diff options
Diffstat (limited to 'arch')
64 files changed, 6119 insertions, 549 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 8cc312b5d4dc..b50b845fdd50 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -6,6 +6,7 @@ mainmenu "Linux/Microblaze Kernel Configuration" config MICROBLAZE def_bool y select HAVE_LMB + select ARCH_WANT_OPTIONAL_GPIOLIB config SWAP def_bool n @@ -49,13 +50,14 @@ config GENERIC_CLOCKEVENTS config GENERIC_HARDIRQS_NO__DO_IRQ def_bool y +config GENERIC_GPIO + def_bool y + config PCI - depends on !MMU def_bool n config NO_DMA - depends on !MMU - def_bool n + def_bool y source "init/Kconfig" @@ -72,7 +74,8 @@ source "kernel/Kconfig.preempt" source "kernel/Kconfig.hz" config MMU - def_bool n + bool "MMU support" + default n config NO_MMU bool @@ -105,9 +108,6 @@ config CMDLINE_FORCE config OF def_bool y -config OF_DEVICE - def_bool y - config PROC_DEVICETREE bool "Support for device tree in /proc" depends on PROC_FS @@ -118,6 +118,113 @@ config PROC_DEVICETREE endmenu +menu "Advanced setup" + +config ADVANCED_OPTIONS + bool "Prompt for advanced kernel configuration options" + depends on MMU + help + This option will enable prompting for a variety of advanced kernel + configuration options. These options can cause the kernel to not + work if they are set incorrectly, but can be used to optimize certain + aspects of kernel memory management. + + Unless you know what you are doing, say N here. + +comment "Default settings for advanced configuration options are used" + depends on !ADVANCED_OPTIONS + +config HIGHMEM_START_BOOL + bool "Set high memory pool address" + depends on ADVANCED_OPTIONS && HIGHMEM + help + This option allows you to set the base address of the kernel virtual + area used to map high memory pages. This can be useful in + optimizing the layout of kernel virtual memory. + + Say N here unless you know what you are doing. + +config HIGHMEM_START + hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL + depends on MMU + default "0xfe000000" + +config LOWMEM_SIZE_BOOL + bool "Set maximum low memory" + depends on ADVANCED_OPTIONS + help + This option allows you to set the maximum amount of memory which + will be used as "low memory", that is, memory which the kernel can + access directly, without having to set up a kernel virtual mapping. + This can be useful in optimizing the layout of kernel virtual + memory. + + Say N here unless you know what you are doing. + +config LOWMEM_SIZE + hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL + depends on MMU + default "0x30000000" + +config KERNEL_START_BOOL + bool "Set custom kernel base address" + depends on ADVANCED_OPTIONS + help + This option allows you to set the kernel virtual address at which + the kernel will map low memory (the kernel image will be linked at + this address). This can be useful in optimizing the virtual memory + layout of the system. + + Say N here unless you know what you are doing. + +config KERNEL_START + hex "Virtual address of kernel base" if KERNEL_START_BOOL + default "0xc0000000" if MMU + default KERNEL_BASE_ADDR if !MMU + +config TASK_SIZE_BOOL + bool "Set custom user task size" + depends on ADVANCED_OPTIONS + help + This option allows you to set the amount of virtual address space + allocated to user tasks. This can be useful in optimizing the + virtual memory layout of the system. + + Say N here unless you know what you are doing. + +config TASK_SIZE + hex "Size of user task space" if TASK_SIZE_BOOL + depends on MMU + default "0x80000000" + +config CONSISTENT_START_BOOL + bool "Set custom consistent memory pool address" + depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE + help + This option allows you to set the base virtual address + of the the consistent memory pool. This pool of virtual + memory is used to make consistent memory allocations. + +config CONSISTENT_START + hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL + depends on MMU + default "0xff100000" if NOT_COHERENT_CACHE + +config CONSISTENT_SIZE_BOOL + bool "Set custom consistent memory pool size" + depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE + help + This option allows you to set the size of the the + consistent memory pool. This pool of virtual memory + is used to make consistent memory allocations. + +config CONSISTENT_SIZE + hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL + depends on MMU + default "0x00200000" if NOT_COHERENT_CACHE + +endmenu + source "mm/Kconfig" menu "Exectuable file formats" diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile index aaadfa701da3..d0bcf80a1136 100644 --- a/arch/microblaze/Makefile +++ b/arch/microblaze/Makefile @@ -1,4 +1,8 @@ +ifeq ($(CONFIG_MMU),y) +UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\" +else UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\" +endif # What CPU vesion are we building for, and crack it open # as major.minor.rev @@ -36,6 +40,8 @@ CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER)) # r31 holds current when in kernel mode CFLAGS_KERNEL += -ffixed-r31 $(CPUFLAGS-1) $(CPUFLAGS-2) +LDFLAGS := +LDFLAGS_vmlinux := LDFLAGS_BLOB := --format binary --oformat elf32-microblaze LIBGCC := $(shell $(CC) $(CFLAGS_KERNEL) -print-libgcc-file-name) diff --git a/arch/microblaze/boot/Makefile b/arch/microblaze/boot/Makefile index 844edf406d34..c2bb043a029d 100644 --- a/arch/microblaze/boot/Makefile +++ b/arch/microblaze/boot/Makefile @@ -7,6 +7,8 @@ targets := linux.bin linux.bin.gz OBJCOPYFLAGS_linux.bin := -O binary $(obj)/linux.bin: vmlinux FORCE + [ -n $(CONFIG_INITRAMFS_SOURCE) ] && [ ! -e $(CONFIG_INITRAMFS_SOURCE) ] && \ + touch $(CONFIG_INITRAMFS_SOURCE) || echo "No CPIO image" $(call if_changed,objcopy) @echo 'Kernel: $@ is ready' ' (#'`cat .version`')' diff --git a/arch/microblaze/configs/mmu_defconfig b/arch/microblaze/configs/mmu_defconfig new file mode 100644 index 000000000000..bd0b85ec38f5 --- /dev/null +++ b/arch/microblaze/configs/mmu_defconfig @@ -0,0 +1,798 @@ +# +# Automatically generated make config: don't edit +# Linux kernel version: 2.6.30-rc6 +# Fri May 22 10:02:33 2009 +# +CONFIG_MICROBLAZE=y +# CONFIG_SWAP is not set +CONFIG_RWSEM_GENERIC_SPINLOCK=y +# CONFIG_ARCH_HAS_ILOG2_U32 is not set +# CONFIG_ARCH_HAS_ILOG2_U64 is not set +CONFIG_GENERIC_FIND_NEXT_BIT=y +CONFIG_GENERIC_HWEIGHT=y +CONFIG_GENERIC_HARDIRQS=y +CONFIG_GENERIC_IRQ_PROBE=y +CONFIG_GENERIC_CALIBRATE_DELAY=y +CONFIG_GENERIC_TIME=y +# CONFIG_GENERIC_TIME_VSYSCALL is not set +CONFIG_GENERIC_CLOCKEVENTS=y +CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y +CONFIG_GENERIC_GPIO=y +CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" + +# +# General setup +# +CONFIG_EXPERIMENTAL=y +CONFIG_BROKEN_ON_SMP=y +CONFIG_INIT_ENV_ARG_LIMIT=32 +CONFIG_LOCALVERSION="" +CONFIG_LOCALVERSION_AUTO=y +CONFIG_SYSVIPC=y +CONFIG_SYSVIPC_SYSCTL=y +# CONFIG_POSIX_MQUEUE is not set +# CONFIG_BSD_PROCESS_ACCT is not set +# CONFIG_TASKSTATS is not set +# CONFIG_AUDIT is not set + +# +# RCU Subsystem +# +CONFIG_CLASSIC_RCU=y +# CONFIG_TREE_RCU is not set +# CONFIG_PREEMPT_RCU is not set +# CONFIG_TREE_RCU_TRACE is not set +# CONFIG_PREEMPT_RCU_TRACE is not set +CONFIG_IKCONFIG=y +CONFIG_IKCONFIG_PROC=y +CONFIG_LOG_BUF_SHIFT=17 +# CONFIG_GROUP_SCHED is not set +# CONFIG_CGROUPS is not set +CONFIG_SYSFS_DEPRECATED=y +CONFIG_SYSFS_DEPRECATED_V2=y +# CONFIG_RELAY is not set +# CONFIG_NAMESPACES is not set +CONFIG_BLK_DEV_INITRD=y +CONFIG_INITRAMFS_SOURCE="rootfs.cpio" +CONFIG_INITRAMFS_ROOT_UID=0 +CONFIG_INITRAMFS_ROOT_GID=0 +CONFIG_RD_GZIP=y +# CONFIG_RD_BZIP2 is not set +# CONFIG_RD_LZMA is not set +CONFIG_INITRAMFS_COMPRESSION_NONE=y +# CONFIG_INITRAMFS_COMPRESSION_GZIP is not set +# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set +# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set +# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set +CONFIG_SYSCTL=y +CONFIG_ANON_INODES=y +CONFIG_EMBEDDED=y +CONFIG_SYSCTL_SYSCALL=y +CONFIG_KALLSYMS=y +CONFIG_KALLSYMS_ALL=y +CONFIG_KALLSYMS_EXTRA_PASS=y +# CONFIG_STRIP_ASM_SYMS is not set +# CONFIG_HOTPLUG is not set +CONFIG_PRINTK=y +CONFIG_BUG=y +CONFIG_ELF_CORE=y +# CONFIG_BASE_FULL is not set +# CONFIG_FUTEX is not set +# CONFIG_EPOLL is not set +# CONFIG_SIGNALFD is not set +CONFIG_TIMERFD=y +CONFIG_EVENTFD=y +# CONFIG_SHMEM is not set +CONFIG_AIO=y +CONFIG_VM_EVENT_COUNTERS=y +CONFIG_COMPAT_BRK=y +CONFIG_SLAB=y +# CONFIG_SLUB is not set +# CONFIG_SLOB is not set +# CONFIG_PROFILING is not set +# CONFIG_MARKERS is not set +# CONFIG_SLOW_WORK is not set +# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set +CONFIG_SLABINFO=y +CONFIG_BASE_SMALL=1 +CONFIG_MODULES=y +# CONFIG_MODULE_FORCE_LOAD is not set +CONFIG_MODULE_UNLOAD=y +# CONFIG_MODULE_FORCE_UNLOAD is not set +# CONFIG_MODVERSIONS is not set +# CONFIG_MODULE_SRCVERSION_ALL is not set +CONFIG_BLOCK=y +# CONFIG_LBD is not set +# CONFIG_BLK_DEV_BSG is not set +# CONFIG_BLK_DEV_INTEGRITY is not set + +# +# IO Schedulers +# +CONFIG_IOSCHED_NOOP=y +CONFIG_IOSCHED_AS=y +CONFIG_IOSCHED_DEADLINE=y +CONFIG_IOSCHED_CFQ=y +# CONFIG_DEFAULT_AS is not set +# CONFIG_DEFAULT_DEADLINE is not set +CONFIG_DEFAULT_CFQ=y +# CONFIG_DEFAULT_NOOP is not set +CONFIG_DEFAULT_IOSCHED="cfq" +# CONFIG_FREEZER is not set + +# +# Platform options +# +CONFIG_PLATFORM_GENERIC=y +CONFIG_OPT_LIB_FUNCTION=y +CONFIG_OPT_LIB_ASM=y +CONFIG_ALLOW_EDIT_AUTO=y + +# +# Automatic platform settings from Kconfig.auto +# + +# +# Definitions for MICROBLAZE0 +# +CONFIG_KERNEL_BASE_ADDR=0x90000000 +CONFIG_XILINX_MICROBLAZE0_FAMILY="virtex5" +CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR=1 +CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR=1 +CONFIG_XILINX_MICROBLAZE0_USE_BARREL=1 +CONFIG_XILINX_MICROBLAZE0_USE_DIV=1 +CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL=2 +CONFIG_XILINX_MICROBLAZE0_USE_FPU=2 +CONFIG_XILINX_MICROBLAZE0_HW_VER="7.10.d" + +# +# Processor type and features +# +# CONFIG_NO_HZ is not set +# CONFIG_HIGH_RES_TIMERS is not set +CONFIG_GENERIC_CLOCKEVENTS_BUILD=y +CONFIG_PREEMPT_NONE=y +# CONFIG_PREEMPT_VOLUNTARY is not set +# CONFIG_PREEMPT is not set +CONFIG_HZ_100=y +# CONFIG_HZ_250 is not set +# CONFIG_HZ_300 is not set +# CONFIG_HZ_1000 is not set +CONFIG_HZ=100 +# CONFIG_SCHED_HRTICK is not set +CONFIG_MMU=y + +# +# Boot options +# +CONFIG_CMDLINE_BOOL=y +CONFIG_CMDLINE="console=ttyUL0,115200" +CONFIG_CMDLINE_FORCE=y +CONFIG_OF=y +CONFIG_PROC_DEVICETREE=y + +# +# Advanced setup +# +# CONFIG_ADVANCED_OPTIONS is not set + +# +# Default settings for advanced configuration options are used +# +CONFIG_HIGHMEM_START=0xfe000000 +CONFIG_LOWMEM_SIZE=0x30000000 +CONFIG_KERNEL_START=0xc0000000 +CONFIG_TASK_SIZE=0x80000000 +CONFIG_SELECT_MEMORY_MODEL=y +CONFIG_FLATMEM_MANUAL=y +# CONFIG_DISCONTIGMEM_MANUAL is not set +# CONFIG_SPARSEMEM_MANUAL is not set +CONFIG_FLATMEM=y +CONFIG_FLAT_NODE_MEM_MAP=y +CONFIG_PAGEFLAGS_EXTENDED=y +CONFIG_SPLIT_PTLOCK_CPUS=4 +# CONFIG_PHYS_ADDR_T_64BIT is not set +CONFIG_ZONE_DMA_FLAG=0 +CONFIG_VIRT_TO_BUS=y +CONFIG_UNEVICTABLE_LRU=y +CONFIG_HAVE_MLOCK=y +CONFIG_HAVE_MLOCKED_PAGE_BIT=y + +# +# Exectuable file formats +# +CONFIG_BINFMT_ELF=y +# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set +# CONFIG_HAVE_AOUT is not set +# CONFIG_BINFMT_MISC is not set +CONFIG_NET=y + +# +# Networking options +# +CONFIG_PACKET=y +# CONFIG_PACKET_MMAP is not set +CONFIG_UNIX=y +CONFIG_XFRM=y +# CONFIG_XFRM_USER is not set +# CONFIG_XFRM_SUB_POLICY is not set +# CONFIG_XFRM_MIGRATE is not set +# CONFIG_XFRM_STATISTICS is not set +# CONFIG_NET_KEY is not set +CONFIG_INET=y +# CONFIG_IP_MULTICAST is not set +# CONFIG_IP_ADVANCED_ROUTER is not set +CONFIG_IP_FIB_HASH=y +# CONFIG_IP_PNP is not set +# CONFIG_NET_IPIP is not set +# CONFIG_NET_IPGRE is not set +# CONFIG_ARPD is not set +# CONFIG_SYN_COOKIES is not set +# CONFIG_INET_AH is not set +# CONFIG_INET_ESP is not set +# CONFIG_INET_IPCOMP is not set +# CONFIG_INET_XFRM_TUNNEL is not set +# CONFIG_INET_TUNNEL is not set +CONFIG_INET_XFRM_MODE_TRANSPORT=y +CONFIG_INET_XFRM_MODE_TUNNEL=y +CONFIG_INET_XFRM_MODE_BEET=y +# CONFIG_INET_LRO is not set +CONFIG_INET_DIAG=y +CONFIG_INET_TCP_DIAG=y +# CONFIG_TCP_CONG_ADVANCED is not set +CONFIG_TCP_CONG_CUBIC=y +CONFIG_DEFAULT_TCP_CONG="cubic" +# CONFIG_TCP_MD5SIG is not set +# CONFIG_IPV6 is not set +# CONFIG_NETWORK_SECMARK is not set +# CONFIG_NETFILTER is not set +# CONFIG_IP_DCCP is not set +# CONFIG_IP_SCTP is not set +# CONFIG_TIPC is not set +# CONFIG_ATM is not set +# CONFIG_BRIDGE is not set +# CONFIG_NET_DSA is not set +# CONFIG_VLAN_8021Q is not set +# CONFIG_DECNET is not set +# CONFIG_LLC2 is not set +# CONFIG_IPX is not set +# CONFIG_ATALK is not set +# CONFIG_X25 is not set +# CONFIG_LAPB is not set +# CONFIG_ECONET is not set +# CONFIG_WAN_ROUTER is not set +# CONFIG_PHONET is not set +# CONFIG_NET_SCHED is not set +# CONFIG_DCB is not set + +# +# Network testing +# +# CONFIG_NET_PKTGEN is not set +# CONFIG_HAMRADIO is not set +# CONFIG_CAN is not set +# CONFIG_IRDA is not set +# CONFIG_BT is not set +# CONFIG_AF_RXRPC is not set +# CONFIG_WIRELESS is not set +# CONFIG_WIMAX is not set +# CONFIG_RFKILL is not set +# CONFIG_NET_9P is not set + +# +# Device Drivers +# + +# +# Generic Driver Options +# +CONFIG_STANDALONE=y +CONFIG_PREVENT_FIRMWARE_BUILD=y +# CONFIG_DEBUG_DRIVER is not set +# CONFIG_DEBUG_DEVRES is not set +# CONFIG_SYS_HYPERVISOR is not set +# CONFIG_CONNECTOR is not set +# CONFIG_MTD is not set +CONFIG_OF_DEVICE=y +# CONFIG_PARPORT is not set +CONFIG_BLK_DEV=y +# CONFIG_BLK_DEV_COW_COMMON is not set +# CONFIG_BLK_DEV_LOOP is not set +# CONFIG_BLK_DEV_NBD is not set +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM_COUNT=16 +CONFIG_BLK_DEV_RAM_SIZE=8192 +# CONFIG_BLK_DEV_XIP is not set +# CONFIG_CDROM_PKTCDVD is not set +# CONFIG_ATA_OVER_ETH is not set +# CONFIG_XILINX_SYSACE is not set +CONFIG_MISC_DEVICES=y +# CONFIG_ENCLOSURE_SERVICES is not set +# CONFIG_C2PORT is not set + +# +# EEPROM support +# +# CONFIG_EEPROM_93CX6 is not set + +# +# SCSI device support +# +# CONFIG_RAID_ATTRS is not set +# CONFIG_SCSI is not set +# CONFIG_SCSI_DMA is not set +# CONFIG_SCSI_NETLINK is not set +# CONFIG_ATA is not set +# CONFIG_MD is not set +CONFIG_NETDEVICES=y +CONFIG_COMPAT_NET_DEV_OPS=y +# CONFIG_DUMMY is not set +# CONFIG_BONDING is not set +# CONFIG_MACVLAN is not set +# CONFIG_EQUALIZER is not set +# CONFIG_TUN is not set +# CONFIG_VETH is not set +# CONFIG_PHYLIB is not set +CONFIG_NET_ETHERNET=y +# CONFIG_MII is not set +# CONFIG_ETHOC is not set +# CONFIG_DNET is not set +# CONFIG_IBM_NEW_EMAC_ZMII is not set +# CONFIG_IBM_NEW_EMAC_RGMII is not set +# CONFIG_IBM_NEW_EMAC_TAH is not set +# CONFIG_IBM_NEW_EMAC_EMAC4 is not set +# CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL is not set +# CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT is not set +# CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR is not set +# CONFIG_B44 is not set +CONFIG_NETDEV_1000=y +CONFIG_NETDEV_10000=y + +# +# Wireless LAN +# +# CONFIG_WLAN_PRE80211 is not set +# CONFIG_WLAN_80211 is not set + +# +# Enable WiMAX (Networking options) to see the WiMAX drivers +# +# CONFIG_WAN is not set +# CONFIG_PPP is not set +# CONFIG_SLIP is not set +# CONFIG_NETCONSOLE is not set +# CONFIG_NETPOLL is not set +# CONFIG_NET_POLL_CONTROLLER is not set +# CONFIG_ISDN is not set +# CONFIG_PHONE is not set + +# +# Input device support +# +# CONFIG_INPUT is not set + +# +# Hardware I/O ports +# +# CONFIG_SERIO is not set +# CONFIG_GAMEPORT is not set + +# +# Character devices +# +# CONFIG_VT is not set +CONFIG_DEVKMEM=y +# CONFIG_SERIAL_NONSTANDARD is not set + +# +# Serial drivers +# +# CONFIG_SERIAL_8250 is not set + +# +# Non-8250 serial port support +# +CONFIG_SERIAL_UARTLITE=y +CONFIG_SERIAL_UARTLITE_CONSOLE=y +CONFIG_SERIAL_CORE=y +CONFIG_SERIAL_CORE_CONSOLE=y +CONFIG_UNIX98_PTYS=y +# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set +CONFIG_LEGACY_PTYS=y +CONFIG_LEGACY_PTY_COUNT=256 +# CONFIG_IPMI_HANDLER is not set +# CONFIG_HW_RANDOM is not set +# CONFIG_RTC is not set +# CONFIG_GEN_RTC is not set +# CONFIG_XILINX_HWICAP is not set +# CONFIG_R3964 is not set +# CONFIG_RAW_DRIVER is not set +# CONFIG_TCG_TPM is not set +# CONFIG_I2C is not set +# CONFIG_SPI is not set +CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y +# CONFIG_GPIOLIB is not set +# CONFIG_W1 is not set +# CONFIG_POWER_SUPPLY is not set +# CONFIG_HWMON is not set +# CONFIG_THERMAL is not set +# CONFIG_THERMAL_HWMON is not set +# CONFIG_WATCHDOG is not set +CONFIG_SSB_POSSIBLE=y + +# +# Sonics Silicon Backplane +# +# CONFIG_SSB is not set + +# +# Multifunction device drivers +# +# CONFIG_MFD_CORE is not set +# CONFIG_MFD_SM501 is not set +# CONFIG_HTC_PASIC3 is not set +# CONFIG_MFD_TMIO is not set +# CONFIG_REGULATOR is not set + +# +# Multimedia devices +# + +# +# Multimedia core support +# +# CONFIG_VIDEO_DEV is not set +# CONFIG_DVB_CORE is not set +# CONFIG_VIDEO_MEDIA is not set + +# +# Multimedia drivers +# +# CONFIG_DAB is not set + +# +# Graphics support +# +# CONFIG_VGASTATE is not set +# CONFIG_VIDEO_OUTPUT_CONTROL is not set +# CONFIG_FB is not set +# CONFIG_BACKLIGHT_LCD_SUPPORT is not set + +# +# Display device support +# +# CONFIG_DISPLAY_SUPPORT is not set +# CONFIG_SOUND is not set +# CONFIG_USB_SUPPORT is not set +# CONFIG_MMC is not set +# CONFIG_MEMSTICK is not set +# CONFIG_NEW_LEDS is not set +# CONFIG_ACCESSIBILITY is not set +# CONFIG_RTC_CLASS is not set +# CONFIG_DMADEVICES is not set +# CONFIG_AUXDISPLAY is not set +# CONFIG_UIO is not set +# CONFIG_STAGING is not set + +# +# File systems +# +CONFIG_EXT2_FS=y +# CONFIG_EXT2_FS_XATTR is not set +# CONFIG_EXT2_FS_XIP is not set +# CONFIG_EXT3_FS is not set +# CONFIG_EXT4_FS is not set +# CONFIG_REISERFS_FS is not set +# CONFIG_JFS_FS is not set +# CONFIG_FS_POSIX_ACL is not set +CONFIG_FILE_LOCKING=y +# CONFIG_XFS_FS is not set +# CONFIG_OCFS2_FS is not set +# CONFIG_BTRFS_FS is not set +# CONFIG_DNOTIFY is not set +# CONFIG_INOTIFY is not set +# CONFIG_QUOTA is not set +# CONFIG_AUTOFS_FS is not set +# CONFIG_AUTOFS4_FS is not set +# CONFIG_FUSE_FS is not set + +# +# Caches +# +# CONFIG_FSCACHE is not set + +# +# CD-ROM/DVD Filesystems +# +# CONFIG_ISO9660_FS is not set +# CONFIG_UDF_FS is not set + +# +# DOS/FAT/NT Filesystems +# +# CONFIG_MSDOS_FS is not set +# CONFIG_VFAT_FS is not set +# CONFIG_NTFS_FS is not set + +# +# Pseudo filesystems +# +CONFIG_PROC_FS=y +# CONFIG_PROC_KCORE is not set +CONFIG_PROC_SYSCTL=y +CONFIG_PROC_PAGE_MONITOR=y +CONFIG_SYSFS=y +CONFIG_TMPFS=y +# CONFIG_TMPFS_POSIX_ACL is not set +# CONFIG_HUGETLB_PAGE is not set +# CONFIG_CONFIGFS_FS is not set +CONFIG_MISC_FILESYSTEMS=y +# CONFIG_ADFS_FS is not set +# CONFIG_AFFS_FS is not set +# CONFIG_HFS_FS is not set +# CONFIG_HFSPLUS_FS is not set +# CONFIG_BEFS_FS is not set +# CONFIG_BFS_FS is not set +# CONFIG_EFS_FS is not set +# CONFIG_CRAMFS is not set +# CONFIG_SQUASHFS is not set +# CONFIG_VXFS_FS is not set +# CONFIG_MINIX_FS is not set +# CONFIG_OMFS_FS is not set +# CONFIG_HPFS_FS is not set +# CONFIG_QNX4FS_FS is not set +# CONFIG_ROMFS_FS is not set +# CONFIG_SYSV_FS is not set +# CONFIG_UFS_FS is not set +# CONFIG_NILFS2_FS is not set +CONFIG_NETWORK_FILESYSTEMS=y +CONFIG_NFS_FS=y +CONFIG_NFS_V3=y +# CONFIG_NFS_V3_ACL is not set +# CONFIG_NFS_V4 is not set +# CONFIG_NFSD is not set +CONFIG_LOCKD=y +CONFIG_LOCKD_V4=y +CONFIG_NFS_COMMON=y +CONFIG_SUNRPC=y +# CONFIG_RPCSEC_GSS_KRB5 is not set +# CONFIG_RPCSEC_GSS_SPKM3 is not set +# CONFIG_SMB_FS is not set +CONFIG_CIFS=y +CONFIG_CIFS_STATS=y +CONFIG_CIFS_STATS2=y +# CONFIG_CIFS_WEAK_PW_HASH is not set +# CONFIG_CIFS_XATTR is not set +# CONFIG_CIFS_DEBUG2 is not set +# CONFIG_CIFS_EXPERIMENTAL is not set +# CONFIG_NCP_FS is not set +# CONFIG_CODA_FS is not set +# CONFIG_AFS_FS is not set + +# +# Partition Types +# +CONFIG_PARTITION_ADVANCED=y +# CONFIG_ACORN_PARTITION is not set +# CONFIG_OSF_PARTITION is not set +# CONFIG_AMIGA_PARTITION is not set +# CONFIG_ATARI_PARTITION is not set +# CONFIG_MAC_PARTITION is not set +CONFIG_MSDOS_PARTITION=y +# CONFIG_BSD_DISKLABEL is not set +# CONFIG_MINIX_SUBPARTITION is not set +# CONFIG_SOLARIS_X86_PARTITION is not set +# CONFIG_UNIXWARE_DISKLABEL is not set +# CONFIG_LDM_PARTITION is not set +# CONFIG_SGI_PARTITION is not set +# CONFIG_ULTRIX_PARTITION is not set +# CONFIG_SUN_PARTITION is not set +# CONFIG_KARMA_PARTITION is not set +# CONFIG_EFI_PARTITION is not set +# CONFIG_SYSV68_PARTITION is not set +CONFIG_NLS=y +CONFIG_NLS_DEFAULT="iso8859-1" +# CONFIG_NLS_CODEPAGE_437 is not set +# CONFIG_NLS_CODEPAGE_737 is not set +# CONFIG_NLS_CODEPAGE_775 is not set +# CONFIG_NLS_CODEPAGE_850 is not set +# CONFIG_NLS_CODEPAGE_852 is not set +# CONFIG_NLS_CODEPAGE_855 is not set +# CONFIG_NLS_CODEPAGE_857 is not set +# CONFIG_NLS_CODEPAGE_860 is not set +# CONFIG_NLS_CODEPAGE_861 is not set +# CONFIG_NLS_CODEPAGE_862 is not set +# CONFIG_NLS_CODEPAGE_863 is not set +# CONFIG_NLS_CODEPAGE_864 is not set +# CONFIG_NLS_CODEPAGE_865 is not set +# CONFIG_NLS_CODEPAGE_866 is not set +# CONFIG_NLS_CODEPAGE_869 is not set +# CONFIG_NLS_CODEPAGE_936 is not set +# CONFIG_NLS_CODEPAGE_950 is not set +# CONFIG_NLS_CODEPAGE_932 is not set +# CONFIG_NLS_CODEPAGE_949 is not set +# CONFIG_NLS_CODEPAGE_874 is not set +# CONFIG_NLS_ISO8859_8 is not set +# CONFIG_NLS_CODEPAGE_1250 is not set +# CONFIG_NLS_CODEPAGE_1251 is not set +# CONFIG_NLS_ASCII is not set +# CONFIG_NLS_ISO8859_1 is not set +# CONFIG_NLS_ISO8859_2 is not set +# CONFIG_NLS_ISO8859_3 is not set +# CONFIG_NLS_ISO8859_4 is not set +# CONFIG_NLS_ISO8859_5 is not set +# CONFIG_NLS_ISO8859_6 is not set +# CONFIG_NLS_ISO8859_7 is not set +# CONFIG_NLS_ISO8859_9 is not set +# CONFIG_NLS_ISO8859_13 is not set +# CONFIG_NLS_ISO8859_14 is not set +# CONFIG_NLS_ISO8859_15 is not set +# CONFIG_NLS_KOI8_R is not set +# CONFIG_NLS_KOI8_U is not set +# CONFIG_NLS_UTF8 is not set +# CONFIG_DLM is not set + +# +# Kernel hacking +# +# CONFIG_PRINTK_TIME is not set +CONFIG_ENABLE_WARN_DEPRECATED=y +CONFIG_ENABLE_MUST_CHECK=y +CONFIG_FRAME_WARN=1024 +# CONFIG_MAGIC_SYSRQ is not set +# CONFIG_UNUSED_SYMBOLS is not set +# CONFIG_DEBUG_FS is not set +# CONFIG_HEADERS_CHECK is not set +CONFIG_DEBUG_KERNEL=y +# CONFIG_DEBUG_SHIRQ is not set +CONFIG_DETECT_SOFTLOCKUP=y +# CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set +CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=0 +CONFIG_DETECT_HUNG_TASK=y +# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set +CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0 +CONFIG_SCHED_DEBUG=y +# CONFIG_SCHEDSTATS is not set +# CONFIG_TIMER_STATS is not set +# CONFIG_DEBUG_OBJECTS is not set +CONFIG_DEBUG_SLAB=y +# CONFIG_DEBUG_SLAB_LEAK is not set +CONFIG_DEBUG_SPINLOCK=y +# CONFIG_DEBUG_MUTEXES is not set +# CONFIG_DEBUG_SPINLOCK_SLEEP is not set +# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set +# CONFIG_DEBUG_KOBJECT is not set +CONFIG_DEBUG_INFO=y +# CONFIG_DEBUG_VM is not set +# CONFIG_DEBUG_WRITECOUNT is not set +# CONFIG_DEBUG_MEMORY_INIT is not set +# CONFIG_DEBUG_LIST is not set +# CONFIG_DEBUG_SG is not set +# CONFIG_DEBUG_NOTIFIERS is not set +# CONFIG_BOOT_PRINTK_DELAY is not set +# CONFIG_RCU_TORTURE_TEST is not set +# CONFIG_RCU_CPU_STALL_DETECTOR is not set +# CONFIG_BACKTRACE_SELF_TEST is not set +# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set +# CONFIG_FAULT_INJECTION is not set +# CONFIG_SYSCTL_SYSCALL_CHECK is not set +# CONFIG_PAGE_POISONING is not set +# CONFIG_SAMPLES is not set +CONFIG_EARLY_PRINTK=y +CONFIG_HEART_BEAT=y +CONFIG_DEBUG_BOOTMEM=y + +# +# Security options +# +# CONFIG_KEYS is not set +# CONFIG_SECURITY is not set +# CONFIG_SECURITYFS is not set +# CONFIG_SECURITY_FILE_CAPABILITIES is not set +CONFIG_CRYPTO=y + +# +# Crypto core or helper +# +# CONFIG_CRYPTO_FIPS is not set +# CONFIG_CRYPTO_MANAGER is not set +# CONFIG_CRYPTO_MANAGER2 is not set +# CONFIG_CRYPTO_GF128MUL is not set +# CONFIG_CRYPTO_NULL is not set +# CONFIG_CRYPTO_CRYPTD is not set +# CONFIG_CRYPTO_AUTHENC is not set +# CONFIG_CRYPTO_TEST is not set + +# +# Authenticated Encryption with Associated Data +# +# CONFIG_CRYPTO_CCM is not set +# CONFIG_CRYPTO_GCM is not set +# CONFIG_CRYPTO_SEQIV is not set + +# +# Block modes +# +# CONFIG_CRYPTO_CBC is not set +# CONFIG_CRYPTO_CTR is not set +# CONFIG_CRYPTO_CTS is not set +# CONFIG_CRYPTO_ECB is not set +# CONFIG_CRYPTO_LRW is not set +# CONFIG_CRYPTO_PCBC is not set +# CONFIG_CRYPTO_XTS is not set + +# +# Hash modes +# +# CONFIG_CRYPTO_HMAC is not set +# CONFIG_CRYPTO_XCBC is not set + +# +# Digest +# +# CONFIG_CRYPTO_CRC32C is not set +# CONFIG_CRYPTO_MD4 is not set +# CONFIG_CRYPTO_MD5 is not set +# CONFIG_CRYPTO_MICHAEL_MIC is not set +# CONFIG_CRYPTO_RMD128 is not set +# CONFIG_CRYPTO_RMD160 is not set +# CONFIG_CRYPTO_RMD256 is not set +# CONFIG_CRYPTO_RMD320 is not set +# CONFIG_CRYPTO_SHA1 is not set +# CONFIG_CRYPTO_SHA256 is not set +# CONFIG_CRYPTO_SHA512 is not set +# CONFIG_CRYPTO_TGR192 is not set +# CONFIG_CRYPTO_WP512 is not set + +# +# Ciphers +# +# CONFIG_CRYPTO_AES is not set +# CONFIG_CRYPTO_ANUBIS is not set +# CONFIG_CRYPTO_ARC4 is not set +# CONFIG_CRYPTO_BLOWFISH is not set +# CONFIG_CRYPTO_CAMELLIA is not set +# CONFIG_CRYPTO_CAST5 is not set +# CONFIG_CRYPTO_CAST6 is not set +# CONFIG_CRYPTO_DES is not set +# CONFIG_CRYPTO_FCRYPT is not set +# CONFIG_CRYPTO_KHAZAD is not set +# CONFIG_CRYPTO_SALSA20 is not set +# CONFIG_CRYPTO_SEED is not set +# CONFIG_CRYPTO_SERPENT is not set +# CONFIG_CRYPTO_TEA is not set +# CONFIG_CRYPTO_TWOFISH is not set + +# +# Compression +# +# CONFIG_CRYPTO_DEFLATE is not set +# CONFIG_CRYPTO_ZLIB is not set +# CONFIG_CRYPTO_LZO is not set + +# +# Random Number Generation +# +# CONFIG_CRYPTO_ANSI_CPRNG is not set +CONFIG_CRYPTO_HW=y +# CONFIG_BINARY_PRINTF is not set + +# +# Library routines +# +CONFIG_BITREVERSE=y +CONFIG_GENERIC_FIND_LAST_BIT=y +# CONFIG_CRC_CCITT is not set +# CONFIG_CRC16 is not set +# CONFIG_CRC_T10DIF is not set +# CONFIG_CRC_ITU_T is not set +CONFIG_CRC32=y +# CONFIG_CRC7 is not set +# CONFIG_LIBCRC32C is not set +CONFIG_ZLIB_INFLATE=y +CONFIG_DECOMPRESS_GZIP=y +CONFIG_HAS_IOMEM=y +CONFIG_HAS_IOPORT=y +CONFIG_HAS_DMA=y +CONFIG_HAVE_LMB=y +CONFIG_NLATTR=y diff --git a/arch/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild index 31820dfef56b..db5294c30caf 100644 --- a/arch/microblaze/include/asm/Kbuild +++ b/arch/microblaze/include/asm/Kbuild @@ -1,26 +1,3 @@ include include/asm-generic/Kbuild.asm -header-y += auxvec.h -header-y += errno.h -header-y += fcntl.h -header-y += ioctl.h -header-y += ioctls.h -header-y += ipcbuf.h -header-y += linkage.h -header-y += msgbuf.h -header-y += poll.h -header-y += resource.h -header-y += sembuf.h -header-y += shmbuf.h -header-y += sigcontext.h -header-y += siginfo.h -header-y += socket.h -header-y += sockios.h -header-y += statfs.h -header-y += stat.h -header-y += termbits.h -header-y += ucontext.h - -unifdef-y += cputable.h -unifdef-y += elf.h -unifdef-y += termios.h +header-y += elf.h diff --git a/arch/microblaze/include/asm/cacheflush.h b/arch/microblaze/include/asm/cacheflush.h index 3300b785049b..f989d6aad648 100644 --- a/arch/microblaze/include/asm/cacheflush.h +++ b/arch/microblaze/include/asm/cacheflush.h @@ -1,5 +1,6 @@ /* - * Copyright (C) 2007 PetaLogix + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix * Copyright (C) 2007 John Williams <john.williams@petalogix.com> * based on v850 version which was * Copyright (C) 2001,02,03 NEC Electronics Corporation @@ -43,6 +44,23 @@ #define flush_icache_range(start, len) __invalidate_icache_range(start, len) #define flush_icache_page(vma, pg) do { } while (0) +#ifndef CONFIG_MMU +# define flush_icache_user_range(start, len) do { } while (0) +#else +# define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all() + +# define flush_page_to_ram(page) do { } while (0) + +# define flush_icache() __invalidate_icache_all() +# define flush_cache_sigtramp(vaddr) \ + __invalidate_icache_range(vaddr, vaddr + 8) + +# define flush_dcache_mmap_lock(mapping) do { } while (0) +# define flush_dcache_mmap_unlock(mapping) do { } while (0) + +# define flush_cache_dup_mm(mm) do { } while (0) +#endif + #define flush_cache_vmap(start, end) do { } while (0) #define flush_cache_vunmap(start, end) do { } while (0) diff --git a/arch/microblaze/include/asm/checksum.h b/arch/microblaze/include/asm/checksum.h index 92b30762ce59..97ea46b5cf80 100644 --- a/arch/microblaze/include/asm/checksum.h +++ b/arch/microblaze/include/asm/checksum.h @@ -51,7 +51,8 @@ extern __wsum csum_partial(const void *buff, int len, __wsum sum); * here even more important to align src and dst on a 32-bit (or even * better 64-bit) boundary */ -extern __wsum csum_partial_copy(const char *src, char *dst, int len, int sum); +extern __wsum csum_partial_copy(const void *src, void *dst, int len, + __wsum sum); /* * the same as csum_partial_copy, but copies from user space. @@ -59,8 +60,8 @@ extern __wsum csum_partial_copy(const char *src, char *dst, int len, int sum); * here even more important to align src and dst on a 32-bit (or even * better 64-bit) boundary */ -extern __wsum csum_partial_copy_from_user(const char *src, char *dst, - int len, int sum, int *csum_err); +extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst, + int len, __wsum sum, int *csum_err); #define csum_partial_copy_nocheck(src, dst, len, sum) \ csum_partial_copy((src), (dst), (len), (sum)) @@ -75,11 +76,12 @@ extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl); /* * Fold a partial checksum */ -static inline __sum16 csum_fold(unsigned int sum) +static inline __sum16 csum_fold(__wsum csum) { + u32 sum = (__force u32)csum; sum = (sum & 0xffff) + (sum >> 16); sum = (sum & 0xffff) + (sum >> 16); - return ~sum; + return (__force __sum16)~sum; } static inline __sum16 @@ -93,6 +95,6 @@ csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len, * this routine is used for miscellaneous IP-like checksums, mainly * in icmp.c */ -extern __sum16 ip_compute_csum(const unsigned char *buff, int len); +extern __sum16 ip_compute_csum(const void *buff, int len); #endif /* _ASM_MICROBLAZE_CHECKSUM_H */ diff --git a/arch/microblaze/include/asm/current.h b/arch/microblaze/include/asm/current.h index 8375ea991e26..29303ed825cc 100644 --- a/arch/microblaze/include/asm/current.h +++ b/arch/microblaze/include/asm/current.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -9,6 +11,12 @@ #ifndef _ASM_MICROBLAZE_CURRENT_H #define _ASM_MICROBLAZE_CURRENT_H +/* + * Register used to hold the current task pointer while in the kernel. + * Any `call clobbered' register without a special meaning should be OK, + * but check asm/microblaze/kernel/entry.S to be sure. + */ +#define CURRENT_TASK r31 # ifndef __ASSEMBLY__ /* * Dedicate r31 to keeping the current task pointer diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h index 17336252a9b8..d00e40099165 100644 --- a/arch/microblaze/include/asm/dma-mapping.h +++ b/arch/microblaze/include/asm/dma-mapping.h @@ -1,129 +1 @@ -/* - * Copyright (C) 2006 Atmark Techno, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#ifndef _ASM_MICROBLAZE_DMA_MAPPING_H -#define _ASM_MICROBLAZE_DMA_MAPPING_H - -#include <asm/cacheflush.h> -#include <linux/io.h> -#include <linux/bug.h> - -struct scatterlist; - -#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) -#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) - -/* FIXME */ -static inline int -dma_supported(struct device *dev, u64 mask) -{ - return 1; -} - -static inline dma_addr_t -dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - BUG(); - return 0; -} - -static inline void -dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, - enum dma_data_direction direction) -{ - BUG(); -} - -static inline int -dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction direction) -{ - BUG(); - return 0; -} - -static inline void -dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, - enum dma_data_direction direction) -{ - BUG(); -} - -static inline void -dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - BUG(); -} - -static inline void -dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction direction) -{ - BUG(); -} - -static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) -{ - BUG(); -} - -static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) -{ - BUG(); -} - -static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return 0; -} - -static inline void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, int flag) -{ - return NULL; /* consistent_alloc(flag, size, dma_handle); */ -} - -static inline void dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle) -{ - BUG(); -} - -static inline dma_addr_t -dma_map_single(struct device *dev, void *ptr, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(direction == DMA_NONE); - - return virt_to_bus(ptr); -} - -static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, - size_t size, - enum dma_data_direction direction) -{ - switch (direction) { - case DMA_FROM_DEVICE: - flush_dcache_range((unsigned)dma_addr, - (unsigned)dma_addr + size); - /* Fall through */ - case DMA_TO_DEVICE: - break; - default: - BUG(); - } -} - -#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */ +#include <asm-generic/dma-mapping-broken.h> diff --git a/arch/microblaze/include/asm/dma.h b/arch/microblaze/include/asm/dma.h index 0967fa04fc5e..08c073badf19 100644 --- a/arch/microblaze/include/asm/dma.h +++ b/arch/microblaze/include/asm/dma.h @@ -9,8 +9,13 @@ #ifndef _ASM_MICROBLAZE_DMA_H #define _ASM_MICROBLAZE_DMA_H +#ifndef CONFIG_MMU /* we don't have dma address limit. define it as zero to be * unlimited. */ #define MAX_DMA_ADDRESS (0) +#else +/* Virtual address corresponding to last available physical memory address. */ +#define MAX_DMA_ADDRESS (CONFIG_KERNEL_START + memory_size - 1) +#endif #endif /* _ASM_MICROBLAZE_DMA_H */ diff --git a/arch/microblaze/include/asm/elf.h b/arch/microblaze/include/asm/elf.h index 81337f241347..f92fc0dda006 100644 --- a/arch/microblaze/include/asm/elf.h +++ b/arch/microblaze/include/asm/elf.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -27,4 +29,95 @@ */ #define ELF_CLASS ELFCLASS32 +#ifndef __uClinux__ + +/* + * ELF register definitions.. + */ + +#include <asm/ptrace.h> +#include <asm/byteorder.h> + +#ifndef ELF_GREG_T +#define ELF_GREG_T +typedef unsigned long elf_greg_t; +#endif + +#ifndef ELF_NGREG +#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t)) +#endif + +#ifndef ELF_GREGSET_T +#define ELF_GREGSET_T +typedef elf_greg_t elf_gregset_t[ELF_NGREG]; +#endif + +#ifndef ELF_FPREGSET_T +#define ELF_FPREGSET_T + +/* TBD */ +#define ELF_NFPREG 33 /* includes fsr */ +typedef unsigned long elf_fpreg_t; +typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; + +/* typedef struct user_fpu_struct elf_fpregset_t; */ +#endif + +/* This is the location that an ET_DYN program is loaded if exec'ed. Typical + * use of this is to invoke "./ld.so someprog" to test out a new version of + * the loader. We need to make sure that it is out of the way of the program + * that it will "exec", and that there is sufficient room for the brk. + */ + +#define ELF_ET_DYN_BASE (0x08000000) + +#ifdef __LITTLE_ENDIAN__ +#define ELF_DATA ELFDATA2LSB +#else +#define ELF_DATA ELFDATA2MSB +#endif + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + + +#define ELF_CORE_COPY_REGS(_dest, _regs) \ + memcpy((char *) &_dest, (char *) _regs, \ + sizeof(struct pt_regs)); + +/* This yields a mask that user programs can use to figure out what + * instruction set this CPU supports. This could be done in user space, + * but it's not easy, and we've already done it here. + */ +#define ELF_HWCAP (0) + +/* This yields a string that ld.so will use to load implementation + * specific libraries for optimization. This is more specific in + * intent than poking at uname or /proc/cpuinfo. + + * For the moment, we have only optimizations for the Intel generations, + * but that could change... + */ +#define ELF_PLATFORM (NULL) + +/* Added _f parameter. Is this definition correct: TBD */ +#define ELF_PLAT_INIT(_r, _f) \ +do { \ + _r->r1 = _r->r1 = _r->r2 = _r->r3 = \ + _r->r4 = _r->r5 = _r->r6 = _r->r7 = \ + _r->r8 = _r->r9 = _r->r10 = _r->r11 = \ + _r->r12 = _r->r13 = _r->r14 = _r->r15 = \ + _r->r16 = _r->r17 = _r->r18 = _r->r19 = \ + _r->r20 = _r->r21 = _r->r22 = _r->r23 = \ + _r->r24 = _r->r25 = _r->r26 = _r->r27 = \ + _r->r28 = _r->r29 = _r->r30 = _r->r31 = \ + 0; \ +} while (0) + +#ifdef __KERNEL__ +#define SET_PERSONALITY(ex) set_personality(PER_LINUX_32BIT) +#endif + +#endif /* __uClinux__ */ + #endif /* _ASM_MICROBLAZE_ELF_H */ diff --git a/arch/microblaze/include/asm/entry.h b/arch/microblaze/include/asm/entry.h index e4c3aef884df..61abbd232640 100644 --- a/arch/microblaze/include/asm/entry.h +++ b/arch/microblaze/include/asm/entry.h @@ -1,8 +1,8 @@ /* * Definitions used by low-level trap handlers * - * Copyright (C) 2008 Michal Simek - * Copyright (C) 2007 - 2008 PetaLogix + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix * Copyright (C) 2007 John Williams <john.williams@petalogix.com> * * This file is subject to the terms and conditions of the GNU General @@ -31,7 +31,40 @@ DECLARE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ DECLARE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ # endif /* __ASSEMBLY__ */ +#ifndef CONFIG_MMU + /* noMMU hasn't any space for args */ # define STATE_SAVE_ARG_SPACE (0) +#else /* CONFIG_MMU */ + +/* If true, system calls save and restore all registers (except result + * registers, of course). If false, then `call clobbered' registers + * will not be preserved, on the theory that system calls are basically + * function calls anyway, and the caller should be able to deal with it. + * This is a security risk, of course, as `internal' values may leak out + * after a system call, but that certainly doesn't matter very much for + * a processor with no MMU protection! For a protected-mode kernel, it + * would be faster to just zero those registers before returning. + * + * I can not rely on the glibc implementation. If you turn it off make + * sure that r11/r12 is saved in user-space. --KAA + * + * These are special variables using by the kernel trap/interrupt code + * to save registers in, at a time when there are no spare registers we + * can use to do so, and we can't depend on the value of the stack + * pointer. This means that they must be within a signed 16-bit + * displacement of 0x00000000. + */ + +/* A `state save frame' is a struct pt_regs preceded by some extra space + * suitable for a function call stack frame. */ + +/* Amount of room on the stack reserved for arguments and to satisfy the + * C calling conventions, in addition to the space used by the struct + * pt_regs that actually holds saved values. */ +#define STATE_SAVE_ARG_SPACE (6*4) /* Up to six arguments */ + +#endif /* CONFIG_MMU */ + #endif /* _ASM_MICROBLAZE_ENTRY_H */ diff --git a/arch/microblaze/include/asm/exceptions.h b/arch/microblaze/include/asm/exceptions.h index 24ca540e77c0..90731df9e574 100644 --- a/arch/microblaze/include/asm/exceptions.h +++ b/arch/microblaze/include/asm/exceptions.h @@ -1,8 +1,8 @@ /* * Preliminary support for HW exception handing for Microblaze * - * Copyright (C) 2008 Michal Simek - * Copyright (C) 2008 PetaLogix + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au> * * This file is subject to the terms and conditions of the GNU General @@ -64,21 +64,13 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, void die(const char *str, struct pt_regs *fp, long err); void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr); -#if defined(CONFIG_XMON) -extern void xmon(struct pt_regs *regs); -extern int xmon_bpt(struct pt_regs *regs); -extern int xmon_sstep(struct pt_regs *regs); -extern int xmon_iabr_match(struct pt_regs *regs); -extern int xmon_dabr_match(struct pt_regs *regs); -extern void (*xmon_fault_handler)(struct pt_regs *regs); +#ifdef CONFIG_MMU +void __bug(const char *file, int line, void *data); +int bad_trap(int trap_num, struct pt_regs *regs); +int debug_trap(struct pt_regs *regs); +#endif /* CONFIG_MMU */ -void (*debugger)(struct pt_regs *regs) = xmon; -int (*debugger_bpt)(struct pt_regs *regs) = xmon_bpt; -int (*debugger_sstep)(struct pt_regs *regs) = xmon_sstep; -int (*debugger_iabr_match)(struct pt_regs *regs) = xmon_iabr_match; -int (*debugger_dabr_match)(struct pt_regs *regs) = xmon_dabr_match; -void (*debugger_fault_handler)(struct pt_regs *regs); -#elif defined(CONFIG_KGDB) +#if defined(CONFIG_KGDB) void (*debugger)(struct pt_regs *regs); int (*debugger_bpt)(struct pt_regs *regs); int (*debugger_sstep)(struct pt_regs *regs); diff --git a/arch/microblaze/include/asm/flat.h b/arch/microblaze/include/asm/flat.h index acf0da543ef1..6847c1512c7b 100644 --- a/arch/microblaze/include/asm/flat.h +++ b/arch/microblaze/include/asm/flat.h @@ -13,7 +13,6 @@ #include <asm/unaligned.h> -#define flat_stack_align(sp) /* nothing needed */ #define flat_argvp_envp_on_stack() 0 #define flat_old_ram_flag(flags) (flags) #define flat_reloc_valid(reloc, size) ((reloc) <= (size)) diff --git a/arch/microblaze/include/asm/gpio.h b/arch/microblaze/include/asm/gpio.h index ea04632399d8..2345ac354d9b 100644 --- a/arch/microblaze/include/asm/gpio.h +++ b/arch/microblaze/include/asm/gpio.h @@ -11,8 +11,8 @@ * (at your option) any later version. */ -#ifndef __ASM_POWERPC_GPIO_H -#define __ASM_POWERPC_GPIO_H +#ifndef _ASM_MICROBLAZE_GPIO_H +#define _ASM_MICROBLAZE_GPIO_H #include <linux/errno.h> #include <asm-generic/gpio.h> @@ -53,4 +53,4 @@ static inline int irq_to_gpio(unsigned int irq) #endif /* CONFIG_GPIOLIB */ -#endif /* __ASM_POWERPC_GPIO_H */ +#endif /* _ASM_MICROBLAZE_GPIO_H */ diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h index 8b5853ee6b5c..5c173424d074 100644 --- a/arch/microblaze/include/asm/io.h +++ b/arch/microblaze/include/asm/io.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -12,6 +14,9 @@ #include <asm/byteorder.h> #include <asm/page.h> #include <linux/types.h> +#include <asm/byteorder.h> +#include <linux/mm.h> /* Get struct page {...} */ + #define IO_SPACE_LIMIT (0xFFFFFFFF) @@ -112,6 +117,30 @@ static inline void writel(unsigned int v, volatile void __iomem *addr) #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) +#ifdef CONFIG_MMU + +#define mm_ptov(addr) ((void *)__phys_to_virt(addr)) +#define mm_vtop(addr) ((unsigned long)__virt_to_phys(addr)) +#define phys_to_virt(addr) ((void *)__phys_to_virt(addr)) +#define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr)) +#define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr)) + +#define __page_address(page) \ + (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT)) +#define page_to_phys(page) virt_to_phys((void *)__page_address(page)) +#define page_to_bus(page) (page_to_phys(page)) +#define bus_to_virt(addr) (phys_to_virt(addr)) + +extern void iounmap(void *addr); +/*extern void *__ioremap(phys_addr_t address, unsigned long size, + unsigned long flags);*/ +extern void __iomem *ioremap(phys_addr_t address, unsigned long size); +#define ioremap_writethrough(addr, size) ioremap((addr), (size)) +#define ioremap_nocache(addr, size) ioremap((addr), (size)) +#define ioremap_fullcache(addr, size) ioremap((addr), (size)) + +#else /* CONFIG_MMU */ + /** * virt_to_phys - map virtual addresses to physical * @address: address to remap @@ -160,6 +189,8 @@ static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size, #define iounmap(addr) ((void)0) #define ioremap_nocache(physaddr, size) ioremap(physaddr, size) +#endif /* CONFIG_MMU */ + /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access diff --git a/arch/microblaze/include/asm/mmu.h b/arch/microblaze/include/asm/mmu.h index 0e0431d61635..66cad6a99d77 100644 --- a/arch/microblaze/include/asm/mmu.h +++ b/arch/microblaze/include/asm/mmu.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -9,11 +11,109 @@ #ifndef _ASM_MICROBLAZE_MMU_H #define _ASM_MICROBLAZE_MMU_H -#ifndef __ASSEMBLY__ +# ifndef CONFIG_MMU +# ifndef __ASSEMBLY__ typedef struct { struct vm_list_struct *vmlist; unsigned long end_brk; } mm_context_t; -#endif /* __ASSEMBLY__ */ +# endif /* __ASSEMBLY__ */ +# else /* CONFIG_MMU */ +# ifdef __KERNEL__ +# ifndef __ASSEMBLY__ +/* Default "unsigned long" context */ +typedef unsigned long mm_context_t; + +/* Hardware Page Table Entry */ +typedef struct _PTE { + unsigned long v:1; /* Entry is valid */ + unsigned long vsid:24; /* Virtual segment identifier */ + unsigned long h:1; /* Hash algorithm indicator */ + unsigned long api:6; /* Abbreviated page index */ + unsigned long rpn:20; /* Real (physical) page number */ + unsigned long :3; /* Unused */ + unsigned long r:1; /* Referenced */ + unsigned long c:1; /* Changed */ + unsigned long w:1; /* Write-thru cache mode */ + unsigned long i:1; /* Cache inhibited */ + unsigned long m:1; /* Memory coherence */ + unsigned long g:1; /* Guarded */ + unsigned long :1; /* Unused */ + unsigned long pp:2; /* Page protection */ +} PTE; + +/* Values for PP (assumes Ks=0, Kp=1) */ +# define PP_RWXX 0 /* Supervisor read/write, User none */ +# define PP_RWRX 1 /* Supervisor read/write, User read */ +# define PP_RWRW 2 /* Supervisor read/write, User read/write */ +# define PP_RXRX 3 /* Supervisor read, User read */ + +/* Segment Register */ +typedef struct _SEGREG { + unsigned long t:1; /* Normal or I/O type */ + unsigned long ks:1; /* Supervisor 'key' (normally 0) */ + unsigned long kp:1; /* User 'key' (normally 1) */ + unsigned long n:1; /* No-execute */ + unsigned long :4; /* Unused */ + unsigned long vsid:24; /* Virtual Segment Identifier */ +} SEGREG; + +extern void _tlbie(unsigned long va); /* invalidate a TLB entry */ +extern void _tlbia(void); /* invalidate all TLB entries */ +# endif /* __ASSEMBLY__ */ + +/* + * The MicroBlaze processor has a TLB architecture identical to PPC-40x. The + * instruction and data sides share a unified, 64-entry, semi-associative + * TLB which is maintained totally under software control. In addition, the + * instruction side has a hardware-managed, 2,4, or 8-entry, fully-associative + * TLB which serves as a first level to the shared TLB. These two TLBs are + * known as the UTLB and ITLB, respectively. + */ + +# define MICROBLAZE_TLB_SIZE 64 + +/* + * TLB entries are defined by a "high" tag portion and a "low" data + * portion. The data portion is 32-bits. + * + * TLB entries are managed entirely under software control by reading, + * writing, and searching using the MTS and MFS instructions. + */ + +# define TLB_LO 1 +# define TLB_HI 0 +# define TLB_DATA TLB_LO +# define TLB_TAG TLB_HI + +/* Tag portion */ +# define TLB_EPN_MASK 0xFFFFFC00 /* Effective Page Number */ +# define TLB_PAGESZ_MASK 0x00000380 +# define TLB_PAGESZ(x) (((x) & 0x7) << 7) +# define PAGESZ_1K 0 +# define PAGESZ_4K 1 +# define PAGESZ_16K 2 +# define PAGESZ_64K 3 +# define PAGESZ_256K 4 +# define PAGESZ_1M 5 +# define PAGESZ_4M 6 +# define PAGESZ_16M 7 +# define TLB_VALID 0x00000040 /* Entry is valid */ + +/* Data portion */ +# define TLB_RPN_MASK 0xFFFFFC00 /* Real Page Number */ +# define TLB_PERM_MASK 0x00000300 +# define TLB_EX 0x00000200 /* Instruction execution allowed */ +# define TLB_WR 0x00000100 /* Writes permitted */ +# define TLB_ZSEL_MASK 0x000000F0 +# define TLB_ZSEL(x) (((x) & 0xF) << 4) +# define TLB_ATTR_MASK 0x0000000F +# define TLB_W 0x00000008 /* Caching is write-through */ +# define TLB_I 0x00000004 /* Caching is inhibited */ +# define TLB_M 0x00000002 /* Memory is coherent */ +# define TLB_G 0x00000001 /* Memory is guarded from prefetch */ + +# endif /* __KERNEL__ */ +# endif /* CONFIG_MMU */ #endif /* _ASM_MICROBLAZE_MMU_H */ diff --git a/arch/microblaze/include/asm/mmu_context.h b/arch/microblaze/include/asm/mmu_context.h index 150ca01b74ba..385fed16bbfb 100644 --- a/arch/microblaze/include/asm/mmu_context.h +++ b/arch/microblaze/include/asm/mmu_context.h @@ -1,21 +1,5 @@ -/* - * Copyright (C) 2006 Atmark Techno, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#ifndef _ASM_MICROBLAZE_MMU_CONTEXT_H -#define _ASM_MICROBLAZE_MMU_CONTEXT_H - -# define init_new_context(tsk, mm) ({ 0; }) - -# define enter_lazy_tlb(mm, tsk) do {} while (0) -# define change_mm_context(old, ctx, _pml4) do {} while (0) -# define destroy_context(mm) do {} while (0) -# define deactivate_mm(tsk, mm) do {} while (0) -# define switch_mm(prev, next, tsk) do {} while (0) -# define activate_mm(prev, next) do {} while (0) - -#endif /* _ASM_MICROBLAZE_MMU_CONTEXT_H */ +#ifdef CONFIG_MMU +# include "mmu_context_mm.h" +#else +# include "mmu_context_no.h" +#endif diff --git a/arch/microblaze/include/asm/mmu_context_mm.h b/arch/microblaze/include/asm/mmu_context_mm.h new file mode 100644 index 000000000000..3e5c254e8d1c --- /dev/null +++ b/arch/microblaze/include/asm/mmu_context_mm.h @@ -0,0 +1,140 @@ +/* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#ifndef _ASM_MICROBLAZE_MMU_CONTEXT_H +#define _ASM_MICROBLAZE_MMU_CONTEXT_H + +#include <asm/atomic.h> +#include <asm/bitops.h> +#include <asm/mmu.h> +#include <asm-generic/mm_hooks.h> + +# ifdef __KERNEL__ +/* + * This function defines the mapping from contexts to VSIDs (virtual + * segment IDs). We use a skew on both the context and the high 4 bits + * of the 32-bit virtual address (the "effective segment ID") in order + * to spread out the entries in the MMU hash table. + */ +# define CTX_TO_VSID(ctx, va) (((ctx) * (897 * 16) + ((va) >> 28) * 0x111) \ + & 0xffffff) + +/* + MicroBlaze has 256 contexts, so we can just rotate through these + as a way of "switching" contexts. If the TID of the TLB is zero, + the PID/TID comparison is disabled, so we can use a TID of zero + to represent all kernel pages as shared among all contexts. + */ + +static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) +{ +} + +# define NO_CONTEXT 256 +# define LAST_CONTEXT 255 +# define FIRST_CONTEXT 1 + +/* + * Set the current MMU context. + * This is done byloading up the segment registers for the user part of the + * address space. + * + * Since the PGD is immediately available, it is much faster to simply + * pass this along as a second parameter, which is required for 8xx and + * can be used for debugging on all processors (if you happen to have + * an Abatron). + */ +extern void set_context(mm_context_t context, pgd_t *pgd); + +/* + * Bitmap of contexts in use. + * The size of this bitmap is LAST_CONTEXT + 1 bits. + */ +extern unsigned long context_map[]; + +/* + * This caches the next context number that we expect to be free. + * Its use is an optimization only, we can't rely on this context + * number to be free, but it usually will be. + */ +extern mm_context_t next_mmu_context; + +/* + * Since we don't have sufficient contexts to give one to every task + * that could be in the system, we need to be able to steal contexts. + * These variables support that. + */ +extern atomic_t nr_free_contexts; +extern struct mm_struct *context_mm[LAST_CONTEXT+1]; +extern void steal_context(void); + +/* + * Get a new mmu context for the address space described by `mm'. + */ +static inline void get_mmu_context(struct mm_struct *mm) +{ + mm_context_t ctx; + + if (mm->context != NO_CONTEXT) + return; + while (atomic_dec_if_positive(&nr_free_contexts) < 0) + steal_context(); + ctx = next_mmu_context; + while (test_and_set_bit(ctx, context_map)) { + ctx = find_next_zero_bit(context_map, LAST_CONTEXT+1, ctx); + if (ctx > LAST_CONTEXT) + ctx = 0; + } + next_mmu_context = (ctx + 1) & LAST_CONTEXT; + mm->context = ctx; + context_mm[ctx] = mm; +} + +/* + * Set up the context for a new address space. + */ +# define init_new_context(tsk, mm) (((mm)->context = NO_CONTEXT), 0) + +/* + * We're finished using the context for an address space. + */ +static inline void destroy_context(struct mm_struct *mm) +{ + if (mm->context != NO_CONTEXT) { + clear_bit(mm->context, context_map); + mm->context = NO_CONTEXT; + atomic_inc(&nr_free_contexts); + } +} + +static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, + struct task_struct *tsk) +{ + tsk->thread.pgdir = next->pgd; + get_mmu_context(next); + set_context(next->context, next->pgd); +} + +/* + * After we have set current->mm to a new value, this activates + * the context for the new mm so we see the new mappings. + */ +static inline void activate_mm(struct mm_struct *active_mm, + struct mm_struct *mm) +{ + current->thread.pgdir = mm->pgd; + get_mmu_context(mm); + set_context(mm->context, mm->pgd); +} + +extern void mmu_context_init(void); + +# endif /* __KERNEL__ */ +#endif /* _ASM_MICROBLAZE_MMU_CONTEXT_H */ diff --git a/arch/microblaze/include/asm/mmu_context_no.h b/arch/microblaze/include/asm/mmu_context_no.h new file mode 100644 index 000000000000..ba5567190154 --- /dev/null +++ b/arch/microblaze/include/asm/mmu_context_no.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#ifndef _ASM_MICROBLAZE_MMU_CONTEXT_H +#define _ASM_MICROBLAZE_MMU_CONTEXT_H + +# define init_new_context(tsk, mm) ({ 0; }) + +# define enter_lazy_tlb(mm, tsk) do {} while (0) +# define change_mm_context(old, ctx, _pml4) do {} while (0) +# define destroy_context(mm) do {} while (0) +# define deactivate_mm(tsk, mm) do {} while (0) +# define switch_mm(prev, next, tsk) do {} while (0) +# define activate_mm(prev, next) do {} while (0) + +#endif /* _ASM_MICROBLAZE_MMU_CONTEXT_H */ diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h index 7238dcfcc517..210e584974f7 100644 --- a/arch/microblaze/include/asm/page.h +++ b/arch/microblaze/include/asm/page.h @@ -1,6 +1,8 @@ /* - * Copyright (C) 2008 Michal Simek - * Copyright (C) 2008 PetaLogix + * VM ops + * + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * Changes for MMU support: * Copyright (C) 2007 Xilinx, Inc. All rights reserved. @@ -15,14 +17,15 @@ #include <linux/pfn.h> #include <asm/setup.h> +#include <linux/const.h> + +#ifdef __KERNEL__ /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT (12) -#define PAGE_SIZE (1UL << PAGE_SHIFT) +#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) -#ifdef __KERNEL__ - #ifndef __ASSEMBLY__ #define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) @@ -35,6 +38,7 @@ /* align addr on a size boundary - adjust address up if needed */ #define _ALIGN(addr, size) _ALIGN_UP(addr, size) +#ifndef CONFIG_MMU /* * PAGE_OFFSET -- the first address of the first page of memory. When not * using MMU this corresponds to the first free page in physical memory (aligned @@ -43,15 +47,44 @@ extern unsigned int __page_offset; #define PAGE_OFFSET __page_offset -#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) -#define get_user_page(vaddr) __get_free_page(GFP_KERNEL) -#define free_user_page(page, addr) free_page(addr) +#else /* CONFIG_MMU */ -#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) +/* + * PAGE_OFFSET -- the first address of the first page of memory. With MMU + * it is set to the kernel start address (aligned on a page boundary). + * + * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used + * in arch/microblaze/Makefile. + */ +#define PAGE_OFFSET CONFIG_KERNEL_START +/* + * MAP_NR -- given an address, calculate the index of the page struct which + * points to the address's page. + */ +#define MAP_NR(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT) -#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) -#define copy_user_page(vto, vfrom, vaddr, topg) \ +/* + * The basic type of a PTE - 32 bit physical addressing. + */ +typedef unsigned long pte_basic_t; +#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ +#define PTE_FMT "%.8lx" + +#endif /* CONFIG_MMU */ + +# ifndef CONFIG_MMU +# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) +# define get_user_page(vaddr) __get_free_page(GFP_KERNEL) +# define free_user_page(page, addr) free_page(addr) +# else /* CONFIG_MMU */ +extern void copy_page(void *to, void *from); +# endif /* CONFIG_MMU */ + +# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) + +# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) +# define copy_user_page(vto, vfrom, vaddr, topg) \ memcpy((vto), (vfrom), PAGE_SIZE) /* @@ -60,21 +93,32 @@ extern unsigned int __page_offset; typedef struct page *pgtable_t; typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pgprot; } pgprot_t; +/* FIXME this can depend on linux kernel version */ +# ifdef CONFIG_MMU +typedef struct { unsigned long pmd; } pmd_t; +typedef struct { unsigned long pgd; } pgd_t; +# else /* CONFIG_MMU */ typedef struct { unsigned long ste[64]; } pmd_t; typedef struct { pmd_t pue[1]; } pud_t; typedef struct { pud_t pge[1]; } pgd_t; +# endif /* CONFIG_MMU */ +# define pte_val(x) ((x).pte) +# define pgprot_val(x) ((x).pgprot) -#define pte_val(x) ((x).pte) -#define pgprot_val(x) ((x).pgprot) -#define pmd_val(x) ((x).ste[0]) -#define pud_val(x) ((x).pue[0]) -#define pgd_val(x) ((x).pge[0]) +# ifdef CONFIG_MMU +# define pmd_val(x) ((x).pmd) +# define pgd_val(x) ((x).pgd) +# else /* CONFIG_MMU */ +# define pmd_val(x) ((x).ste[0]) +# define pud_val(x) ((x).pue[0]) +# define pgd_val(x) ((x).pge[0]) +# endif /* CONFIG_MMU */ -#define __pte(x) ((pte_t) { (x) }) -#define __pmd(x) ((pmd_t) { (x) }) -#define __pgd(x) ((pgd_t) { (x) }) -#define __pgprot(x) ((pgprot_t) { (x) }) +# define __pte(x) ((pte_t) { (x) }) +# define __pmd(x) ((pmd_t) { (x) }) +# define __pgd(x) ((pgd_t) { (x) }) +# define __pgprot(x) ((pgprot_t) { (x) }) /** * Conversions for virtual address, physical address, pfn, and struct @@ -94,44 +138,80 @@ extern unsigned long max_low_pfn; extern unsigned long min_low_pfn; extern unsigned long max_pfn; -#define __pa(vaddr) ((unsigned long) (vaddr)) -#define __va(paddr) ((void *) (paddr)) +extern unsigned long memory_start; +extern unsigned long memory_end; +extern unsigned long memory_size; -#define phys_to_pfn(phys) (PFN_DOWN(phys)) -#define pfn_to_phys(pfn) (PFN_PHYS(pfn)) +extern int page_is_ram(unsigned long pfn); -#define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) -#define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) +# define phys_to_pfn(phys) (PFN_DOWN(phys)) +# define pfn_to_phys(pfn) (PFN_PHYS(pfn)) -#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) -#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) +# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) +# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) -#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) -#define page_to_bus(page) (page_to_phys(page)) -#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) +# ifdef CONFIG_MMU +# define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr)) +# else /* CONFIG_MMU */ +# define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) +# define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) +# define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) +# define page_to_bus(page) (page_to_phys(page)) +# define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) +# endif /* CONFIG_MMU */ -extern unsigned int memory_start; -extern unsigned int memory_end; -extern unsigned int memory_size; +# ifndef CONFIG_MMU +# define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) <= max_mapnr) +# define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) +# else /* CONFIG_MMU */ +# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT) +# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET)) +# define VALID_PAGE(page) ((page - mem_map) < max_mapnr) +# endif /* CONFIG_MMU */ -#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_mapnr) +# endif /* __ASSEMBLY__ */ -#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) +#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) -#else -#define tophys(rd, rs) (addik rd, rs, 0) -#define tovirt(rd, rs) (addik rd, rs, 0) -#endif /* __ASSEMBLY__ */ -#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) +# ifndef CONFIG_MMU +# define __pa(vaddr) ((unsigned long) (vaddr)) +# define __va(paddr) ((void *) (paddr)) +# else /* CONFIG_MMU */ +# define __pa(x) __virt_to_phys((unsigned long)(x)) +# define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) +# endif /* CONFIG_MMU */ + -/* Convert between virtual and physical address for MMU. */ -/* Handle MicroBlaze processor with virtual memory. */ +/* Convert between virtual and physical address for MMU. */ +/* Handle MicroBlaze processor with virtual memory. */ +#ifndef CONFIG_MMU #define __virt_to_phys(addr) addr #define __phys_to_virt(addr) addr +#define tophys(rd, rs) addik rd, rs, 0 +#define tovirt(rd, rs) addik rd, rs, 0 +#else +#define __virt_to_phys(addr) \ + ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) +#define __phys_to_virt(addr) \ + ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) +#define tophys(rd, rs) \ + addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) +#define tovirt(rd, rs) \ + addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) +#endif /* CONFIG_MMU */ #define TOPHYS(addr) __virt_to_phys(addr) +#ifdef CONFIG_MMU +#ifdef CONFIG_CONTIGUOUS_PAGE_ALLOC +#define WANT_PAGE_VIRTUAL 1 /* page alloc 2 relies on this */ +#endif + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) +#endif /* CONFIG_MMU */ + #endif /* __KERNEL__ */ #include <asm-generic/memory_model.h> diff --git a/arch/microblaze/include/asm/pgalloc.h b/arch/microblaze/include/asm/pgalloc.h index 2a4b35484010..59a757e46ba5 100644 --- a/arch/microblaze/include/asm/pgalloc.h +++ b/arch/microblaze/include/asm/pgalloc.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -9,6 +11,195 @@ #ifndef _ASM_MICROBLAZE_PGALLOC_H #define _ASM_MICROBLAZE_PGALLOC_H +#ifdef CONFIG_MMU + +#include <linux/kernel.h> /* For min/max macros */ +#include <linux/highmem.h> +#include <asm/setup.h> +#include <asm/io.h> +#include <asm/page.h> +#include <asm/cache.h> + +#define PGDIR_ORDER 0 + +/* + * This is handled very differently on MicroBlaze since out page tables + * are all 0's and I want to be able to use these zero'd pages elsewhere + * as well - it gives us quite a speedup. + * -- Cort + */ +extern struct pgtable_cache_struct { + unsigned long *pgd_cache; + unsigned long *pte_cache; + unsigned long pgtable_cache_sz; +} quicklists; + +#define pgd_quicklist (quicklists.pgd_cache) +#define pmd_quicklist ((unsigned long *)0) +#define pte_quicklist (quicklists.pte_cache) +#define pgtable_cache_size (quicklists.pgtable_cache_sz) + +extern unsigned long *zero_cache; /* head linked list of pre-zero'd pages */ +extern atomic_t zero_sz; /* # currently pre-zero'd pages */ +extern atomic_t zeropage_hits; /* # zero'd pages request that we've done */ +extern atomic_t zeropage_calls; /* # zero'd pages request that've been made */ +extern atomic_t zerototal; /* # pages zero'd over time */ + +#define zero_quicklist (zero_cache) +#define zero_cache_sz (zero_sz) +#define zero_cache_calls (zeropage_calls) +#define zero_cache_hits (zeropage_hits) +#define zero_cache_total (zerototal) + +/* + * return a pre-zero'd page from the list, + * return NULL if none available -- Cort + */ +extern unsigned long get_zero_page_fast(void); + +extern void __bad_pte(pmd_t *pmd); + +extern inline pgd_t *get_pgd_slow(void) +{ + pgd_t *ret; + + ret = (pgd_t *)__get_free_pages(GFP_KERNEL, PGDIR_ORDER); + if (ret != NULL) + clear_page(ret); + return ret; +} + +extern inline pgd_t *get_pgd_fast(void) +{ + unsigned long *ret; + + ret = pgd_quicklist; + if (ret != NULL) { + pgd_quicklist = (unsigned long *)(*ret); + ret[0] = 0; + pgtable_cache_size--; + } else + ret = (unsigned long *)get_pgd_slow(); + return (pgd_t *)ret; +} + +extern inline void free_pgd_fast(pgd_t *pgd) +{ + *(unsigned long **)pgd = pgd_quicklist; + pgd_quicklist = (unsigned long *) pgd; + pgtable_cache_size++; +} + +extern inline void free_pgd_slow(pgd_t *pgd) +{ + free_page((unsigned long)pgd); +} + +#define pgd_free(mm, pgd) free_pgd_fast(pgd) +#define pgd_alloc(mm) get_pgd_fast() + +#define pmd_pgtable(pmd) pmd_page(pmd) + +/* + * We don't have any real pmd's, and this code never triggers because + * the pgd will always be present.. + */ +#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); }) +#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); }) +/* FIXME two definition - look below */ +#define pmd_free(mm, x) do { } while (0) +#define pgd_populate(mm, pmd, pte) BUG() + +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address) +{ + pte_t *pte; + extern int mem_init_done; + extern void *early_get_page(void); + if (mem_init_done) { + pte = (pte_t *)__get_free_page(GFP_KERNEL | + __GFP_REPEAT | __GFP_ZERO); + } else { + pte = (pte_t *)early_get_page(); + if (pte) + clear_page(pte); + } + return pte; +} + +static inline struct page *pte_alloc_one(struct mm_struct *mm, + unsigned long address) +{ + struct page *ptepage; + +#ifdef CONFIG_HIGHPTE + int flags = GFP_KERNEL | __GFP_HIGHMEM | __GFP_REPEAT; +#else + int flags = GFP_KERNEL | __GFP_REPEAT; +#endif + + ptepage = alloc_pages(flags, 0); + if (ptepage) + clear_highpage(ptepage); + return ptepage; +} + +static inline pte_t *pte_alloc_one_fast(struct mm_struct *mm, + unsigned long address) +{ + unsigned long *ret; + + ret = pte_quicklist; + if (ret != NULL) { + pte_quicklist = (unsigned long *)(*ret); + ret[0] = 0; + pgtable_cache_size--; + } + return (pte_t *)ret; +} + +extern inline void pte_free_fast(pte_t *pte) +{ + *(unsigned long **)pte = pte_quicklist; + pte_quicklist = (unsigned long *) pte; + pgtable_cache_size++; +} + +extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) +{ + free_page((unsigned long)pte); +} + +extern inline void pte_free_slow(struct page *ptepage) +{ + __free_page(ptepage); +} + +extern inline void pte_free(struct mm_struct *mm, struct page *ptepage) +{ + __free_page(ptepage); +} + +#define __pte_free_tlb(tlb, pte) pte_free((tlb)->mm, (pte)) + +#define pmd_populate(mm, pmd, pte) (pmd_val(*(pmd)) = page_address(pte)) + +#define pmd_populate_kernel(mm, pmd, pte) \ + (pmd_val(*(pmd)) = (unsigned long) (pte)) + +/* + * We don't have any real pmd's, and this code never triggers because + * the pgd will always be present.. + */ +#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); }) +/*#define pmd_free(mm, x) do { } while (0)*/ +#define __pmd_free_tlb(tlb, x) do { } while (0) +#define pgd_populate(mm, pmd, pte) BUG() + +extern int do_check_pgt_cache(int, int); + +#endif /* CONFIG_MMU */ + #define check_pgt_cache() do {} while (0) #endif /* _ASM_MICROBLAZE_PGALLOC_H */ diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h index 4df31e46568e..4c57a586a989 100644 --- a/arch/microblaze/include/asm/pgtable.h +++ b/arch/microblaze/include/asm/pgtable.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -14,6 +16,8 @@ #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ remap_pfn_range(vma, vaddr, pfn, size, prot) +#ifndef CONFIG_MMU + #define pgd_present(pgd) (1) /* pages are always present on non MMU */ #define pgd_none(pgd) (0) #define pgd_bad(pgd) (0) @@ -27,6 +31,8 @@ #define PAGE_READONLY __pgprot(0) /* these mean nothing to non MMU */ #define PAGE_KERNEL __pgprot(0) /* these mean nothing to non MMU */ +#define pgprot_noncached(x) (x) + #define __swp_type(x) (0) #define __swp_offset(x) (0) #define __swp_entry(typ, off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) @@ -45,6 +51,538 @@ static inline int pte_file(pte_t pte) { return 0; } #define arch_enter_lazy_cpu_mode() do {} while (0) +#else /* CONFIG_MMU */ + +#include <asm-generic/4level-fixup.h> + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +#include <linux/sched.h> +#include <linux/threads.h> +#include <asm/processor.h> /* For TASK_SIZE */ +#include <asm/mmu.h> +#include <asm/page.h> + +#define FIRST_USER_ADDRESS 0 + +extern unsigned long va_to_phys(unsigned long address); +extern pte_t *va_to_pte(unsigned long address); +extern unsigned long ioremap_bot, ioremap_base; + +/* + * The following only work if pte_present() is true. + * Undefined behaviour if not.. + */ + +static inline int pte_special(pte_t pte) { return 0; } + +static inline pte_t pte_mkspecial(pte_t pte) { return pte; } + +/* Start and end of the vmalloc area. */ +/* Make sure to map the vmalloc area above the pinned kernel memory area + of 32Mb. */ +#define VMALLOC_START (CONFIG_KERNEL_START + \ + max(32 * 1024 * 1024UL, memory_size)) +#define VMALLOC_END ioremap_bot +#define VMALLOC_VMADDR(x) ((unsigned long)(x)) + +#endif /* __ASSEMBLY__ */ + +/* + * The MicroBlaze MMU is identical to the PPC-40x MMU, and uses a hash + * table containing PTEs, together with a set of 16 segment registers, to + * define the virtual to physical address mapping. + * + * We use the hash table as an extended TLB, i.e. a cache of currently + * active mappings. We maintain a two-level page table tree, much + * like that used by the i386, for the sake of the Linux memory + * management code. Low-level assembler code in hashtable.S + * (procedure hash_page) is responsible for extracting ptes from the + * tree and putting them into the hash table when necessary, and + * updating the accessed and modified bits in the page table tree. + */ + +/* + * The MicroBlaze processor has a TLB architecture identical to PPC-40x. The + * instruction and data sides share a unified, 64-entry, semi-associative + * TLB which is maintained totally under software control. In addition, the + * instruction side has a hardware-managed, 2,4, or 8-entry, fully-associative + * TLB which serves as a first level to the shared TLB. These two TLBs are + * known as the UTLB and ITLB, respectively (see "mmu.h" for definitions). + */ + +/* + * The normal case is that PTEs are 32-bits and we have a 1-page + * 1024-entry pgdir pointing to 1-page 1024-entry PTE pages. -- paulus + * + */ + +/* PMD_SHIFT determines the size of the area mapped by the PTE pages */ +#define PMD_SHIFT (PAGE_SHIFT + PTE_SHIFT) +#define PMD_SIZE (1UL << PMD_SHIFT) +#define PMD_MASK (~(PMD_SIZE-1)) + +/* PGDIR_SHIFT determines what a top-level page table entry can map */ +#define PGDIR_SHIFT PMD_SHIFT +#define PGDIR_SIZE (1UL << PGDIR_SHIFT) +#define PGDIR_MASK (~(PGDIR_SIZE-1)) + +/* + * entries per page directory level: our page-table tree is two-level, so + * we don't really have any PMD directory. + */ +#define PTRS_PER_PTE (1 << PTE_SHIFT) +#define PTRS_PER_PMD 1 +#define PTRS_PER_PGD (1 << (32 - PGDIR_SHIFT)) + +#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE) +#define FIRST_USER_PGD_NR 0 + +#define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT) +#define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS) + +#define pte_ERROR(e) \ + printk(KERN_ERR "%s:%d: bad pte "PTE_FMT".\n", \ + __FILE__, __LINE__, pte_val(e)) +#define pmd_ERROR(e) \ + printk(KERN_ERR "%s:%d: bad pmd %08lx.\n", \ + __FILE__, __LINE__, pmd_val(e)) +#define pgd_ERROR(e) \ + printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \ + __FILE__, __LINE__, pgd_val(e)) + +/* + * Bits in a linux-style PTE. These match the bits in the + * (hardware-defined) PTE as closely as possible. + */ + +/* There are several potential gotchas here. The hardware TLBLO + * field looks like this: + * + * 0 1 2 3 4 ... 18 19 20 21 22 23 24 25 26 27 28 29 30 31 + * RPN..................... 0 0 EX WR ZSEL....... W I M G + * + * Where possible we make the Linux PTE bits match up with this + * + * - bits 20 and 21 must be cleared, because we use 4k pages (4xx can + * support down to 1k pages), this is done in the TLBMiss exception + * handler. + * - We use only zones 0 (for kernel pages) and 1 (for user pages) + * of the 16 available. Bit 24-26 of the TLB are cleared in the TLB + * miss handler. Bit 27 is PAGE_USER, thus selecting the correct + * zone. + * - PRESENT *must* be in the bottom two bits because swap cache + * entries use the top 30 bits. Because 4xx doesn't support SMP + * anyway, M is irrelevant so we borrow it for PAGE_PRESENT. Bit 30 + * is cleared in the TLB miss handler before the TLB entry is loaded. + * - All other bits of the PTE are loaded into TLBLO without + * * modification, leaving us only the bits 20, 21, 24, 25, 26, 30 for + * software PTE bits. We actually use use bits 21, 24, 25, and + * 30 respectively for the software bits: ACCESSED, DIRTY, RW, and + * PRESENT. + */ + +/* Definitions for MicroBlaze. */ +#define _PAGE_GUARDED 0x001 /* G: page is guarded from prefetch */ +#define _PAGE_PRESENT 0x002 /* software: PTE contains a translation */ +#define _PAGE_NO_CACHE 0x004 /* I: caching is inhibited */ +#define _PAGE_WRITETHRU 0x008 /* W: caching is write-through */ +#define _PAGE_USER 0x010 /* matches one of the zone permission bits */ +#define _PAGE_RW 0x040 /* software: Writes permitted */ +#define _PAGE_DIRTY 0x080 /* software: dirty page */ +#define _PAGE_HWWRITE 0x100 /* hardware: Dirty & RW, set in exception */ +#define _PAGE_HWEXEC 0x200 /* hardware: EX permission */ +#define _PAGE_ACCESSED 0x400 /* software: R: page referenced */ +#define _PMD_PRESENT PAGE_MASK + +/* + * Some bits are unused... + */ +#ifndef _PAGE_HASHPTE +#define _PAGE_HASHPTE 0 +#endif +#ifndef _PTE_NONE_MASK +#define _PTE_NONE_MASK 0 +#endif +#ifndef _PAGE_SHARED +#define _PAGE_SHARED 0 +#endif +#ifndef _PAGE_HWWRITE +#define _PAGE_HWWRITE 0 +#endif +#ifndef _PAGE_HWEXEC +#define _PAGE_HWEXEC 0 +#endif +#ifndef _PAGE_EXEC +#define _PAGE_EXEC 0 +#endif + +#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) + +/* + * Note: the _PAGE_COHERENT bit automatically gets set in the hardware + * PTE if CONFIG_SMP is defined (hash_page does this); there is no need + * to have it in the Linux PTE, and in fact the bit could be reused for + * another purpose. -- paulus. + */ +#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED) +#define _PAGE_WRENABLE (_PAGE_RW | _PAGE_DIRTY | _PAGE_HWWRITE) + +#define _PAGE_KERNEL \ + (_PAGE_BASE | _PAGE_WRENABLE | _PAGE_SHARED | _PAGE_HWEXEC) + +#define _PAGE_IO (_PAGE_KERNEL | _PAGE_NO_CACHE | _PAGE_GUARDED) + +#define PAGE_NONE __pgprot(_PAGE_BASE) +#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER) +#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) +#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW) +#define PAGE_SHARED_X \ + __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_EXEC) +#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER) +#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC) + +#define PAGE_KERNEL __pgprot(_PAGE_KERNEL) +#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_SHARED) +#define PAGE_KERNEL_CI __pgprot(_PAGE_IO) + +/* + * We consider execute permission the same as read. + * Also, write permissions imply read permissions. + */ +#define __P000 PAGE_NONE +#define __P001 PAGE_READONLY_X +#define __P010 PAGE_COPY +#define __P011 PAGE_COPY_X +#define __P100 PAGE_READONLY +#define __P101 PAGE_READONLY_X +#define __P110 PAGE_COPY +#define __P111 PAGE_COPY_X + +#define __S000 PAGE_NONE +#define __S001 PAGE_READONLY_X +#define __S010 PAGE_SHARED +#define __S011 PAGE_SHARED_X +#define __S100 PAGE_READONLY +#define __S101 PAGE_READONLY_X +#define __S110 PAGE_SHARED +#define __S111 PAGE_SHARED_X + +#ifndef __ASSEMBLY__ +/* + * ZERO_PAGE is a global shared page that is always zero: used + * for zero-mapped memory areas etc.. + */ +extern unsigned long empty_zero_page[1024]; +#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) + +#endif /* __ASSEMBLY__ */ + +#define pte_none(pte) ((pte_val(pte) & ~_PTE_NONE_MASK) == 0) +#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) +#define pte_clear(mm, addr, ptep) \ + do { set_pte_at((mm), (addr), (ptep), __pte(0)); } while (0) + +#define pmd_none(pmd) (!pmd_val(pmd)) +#define pmd_bad(pmd) ((pmd_val(pmd) & _PMD_PRESENT) == 0) +#define pmd_present(pmd) ((pmd_val(pmd) & _PMD_PRESENT) != 0) +#define pmd_clear(pmdp) do { pmd_val(*(pmdp)) = 0; } while (0) + +#define pte_page(x) (mem_map + (unsigned long) \ + ((pte_val(x) - memory_start) >> PAGE_SHIFT)) +#define PFN_SHIFT_OFFSET (PAGE_SHIFT) + +#define pte_pfn(x) (pte_val(x) >> PFN_SHIFT_OFFSET) + +#define pfn_pte(pfn, prot) \ + __pte(((pte_basic_t)(pfn) << PFN_SHIFT_OFFSET) | pgprot_val(prot)) + +#ifndef __ASSEMBLY__ +/* + * The "pgd_xxx()" functions here are trivial for a folded two-level + * setup: the pgd is never bad, and a pmd always exists (as it's folded + * into the pgd entry) + */ +static inline int pgd_none(pgd_t pgd) { return 0; } +static inline int pgd_bad(pgd_t pgd) { return 0; } +static inline int pgd_present(pgd_t pgd) { return 1; } +#define pgd_clear(xp) do { } while (0) +#define pgd_page(pgd) \ + ((unsigned long) __va(pgd_val(pgd) & PAGE_MASK)) + +/* + * The following only work if pte_present() is true. + * Undefined behaviour if not.. + */ +static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; } +static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } +static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_EXEC; } +static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } +static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } +/* FIXME */ +static inline int pte_file(pte_t pte) { return 0; } + +static inline void pte_uncache(pte_t pte) { pte_val(pte) |= _PAGE_NO_CACHE; } +static inline void pte_cache(pte_t pte) { pte_val(pte) &= ~_PAGE_NO_CACHE; } + +static inline pte_t pte_rdprotect(pte_t pte) \ + { pte_val(pte) &= ~_PAGE_USER; return pte; } +static inline pte_t pte_wrprotect(pte_t pte) \ + { pte_val(pte) &= ~(_PAGE_RW | _PAGE_HWWRITE); return pte; } +static inline pte_t pte_exprotect(pte_t pte) \ + { pte_val(pte) &= ~_PAGE_EXEC; return pte; } +static inline pte_t pte_mkclean(pte_t pte) \ + { pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_HWWRITE); return pte; } +static inline pte_t pte_mkold(pte_t pte) \ + { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; } + +static inline pte_t pte_mkread(pte_t pte) \ + { pte_val(pte) |= _PAGE_USER; return pte; } +static inline pte_t pte_mkexec(pte_t pte) \ + { pte_val(pte) |= _PAGE_USER | _PAGE_EXEC; return pte; } +static inline pte_t pte_mkwrite(pte_t pte) \ + { pte_val(pte) |= _PAGE_RW; return pte; } +static inline pte_t pte_mkdirty(pte_t pte) \ + { pte_val(pte) |= _PAGE_DIRTY; return pte; } +static inline pte_t pte_mkyoung(pte_t pte) \ + { pte_val(pte) |= _PAGE_ACCESSED; return pte; } + +/* + * Conversion functions: convert a page and protection to a page entry, + * and a page entry and page directory to the page they refer to. + */ + +static inline pte_t mk_pte_phys(phys_addr_t physpage, pgprot_t pgprot) +{ + pte_t pte; + pte_val(pte) = physpage | pgprot_val(pgprot); + return pte; +} + +#define mk_pte(page, pgprot) \ +({ \ + pte_t pte; \ + pte_val(pte) = (((page - mem_map) << PAGE_SHIFT) + memory_start) | \ + pgprot_val(pgprot); \ + pte; \ +}) + +static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) +{ + pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); + return pte; +} + +/* + * Atomic PTE updates. + * + * pte_update clears and sets bit atomically, and returns + * the old pte value. + * The ((unsigned long)(p+1) - 4) hack is to get to the least-significant + * 32 bits of the PTE regardless of whether PTEs are 32 or 64 bits. + */ +static inline unsigned long pte_update(pte_t *p, unsigned long clr, + unsigned long set) +{ + unsigned long old, tmp, msr; + + __asm__ __volatile__("\ + msrclr %2, 0x2\n\ + nop\n\ + lw %0, %4, r0\n\ + andn %1, %0, %5\n\ + or %1, %1, %6\n\ + sw %1, %4, r0\n\ + mts rmsr, %2\n\ + nop" + : "=&r" (old), "=&r" (tmp), "=&r" (msr), "=m" (*p) + : "r" ((unsigned long)(p+1) - 4), "r" (clr), "r" (set), "m" (*p) + : "cc"); + + return old; +} + +/* + * set_pte stores a linux PTE into the linux page table. + */ +static inline void set_pte(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte) +{ + *ptep = pte; +} + +static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte) +{ + *ptep = pte; +} + +static inline int ptep_test_and_clear_young(struct mm_struct *mm, + unsigned long addr, pte_t *ptep) +{ + return (pte_update(ptep, _PAGE_ACCESSED, 0) & _PAGE_ACCESSED) != 0; +} + +static inline int ptep_test_and_clear_dirty(struct mm_struct *mm, + unsigned long addr, pte_t *ptep) +{ + return (pte_update(ptep, \ + (_PAGE_DIRTY | _PAGE_HWWRITE), 0) & _PAGE_DIRTY) != 0; +} + +static inline pte_t ptep_get_and_clear(struct mm_struct *mm, + unsigned long addr, pte_t *ptep) +{ + return __pte(pte_update(ptep, ~_PAGE_HASHPTE, 0)); +} + +/*static inline void ptep_set_wrprotect(struct mm_struct *mm, + unsigned long addr, pte_t *ptep) +{ + pte_update(ptep, (_PAGE_RW | _PAGE_HWWRITE), 0); +}*/ + +static inline void ptep_mkdirty(struct mm_struct *mm, + unsigned long addr, pte_t *ptep) +{ + pte_update(ptep, 0, _PAGE_DIRTY); +} + +/*#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HASHPTE) == 0)*/ + +/* Convert pmd entry to page */ +/* our pmd entry is an effective address of pte table*/ +/* returns effective address of the pmd entry*/ +#define pmd_page_kernel(pmd) ((unsigned long) (pmd_val(pmd) & PAGE_MASK)) + +/* returns struct *page of the pmd entry*/ +#define pmd_page(pmd) (pfn_to_page(__pa(pmd_val(pmd)) >> PAGE_SHIFT)) + +/* to find an entry in a kernel page-table-directory */ +#define pgd_offset_k(address) pgd_offset(&init_mm, address) + +/* to find an entry in a page-table-directory */ +#define pgd_index(address) ((address) >> PGDIR_SHIFT) +#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) + +/* Find an entry in the second-level page table.. */ +static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address) +{ + return (pmd_t *) dir; +} + +/* Find an entry in the third-level page table.. */ +#define pte_index(address) \ + (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) +#define pte_offset_kernel(dir, addr) \ + ((pte_t *) pmd_page_kernel(*(dir)) + pte_index(addr)) +#define pte_offset_map(dir, addr) \ + ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE0) + pte_index(addr)) +#define pte_offset_map_nested(dir, addr) \ + ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE1) + pte_index(addr)) + +#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0) +#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1) + +/* Encode and decode a nonlinear file mapping entry */ +#define PTE_FILE_MAX_BITS 29 +#define pte_to_pgoff(pte) (pte_val(pte) >> 3) +#define pgoff_to_pte(off) ((pte_t) { ((off) << 3) }) + +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; + +/* + * When flushing the tlb entry for a page, we also need to flush the hash + * table entry. flush_hash_page is assembler (for speed) in hashtable.S. + */ +extern int flush_hash_page(unsigned context, unsigned long va, pte_t *ptep); + +/* Add an HPTE to the hash table */ +extern void add_hash_page(unsigned context, unsigned long va, pte_t *ptep); + +/* + * Encode and decode a swap entry. + * Note that the bits we use in a PTE for representing a swap entry + * must not include the _PAGE_PRESENT bit, or the _PAGE_HASHPTE bit + * (if used). -- paulus + */ +#define __swp_type(entry) ((entry).val & 0x3f) +#define __swp_offset(entry) ((entry).val >> 6) +#define __swp_entry(type, offset) \ + ((swp_entry_t) { (type) | ((offset) << 6) }) +#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 2 }) +#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 2 }) + + +/* CONFIG_APUS */ +/* For virtual address to physical address conversion */ +extern void cache_clear(__u32 addr, int length); +extern void cache_push(__u32 addr, int length); +extern int mm_end_of_chunk(unsigned long addr, int len); +extern unsigned long iopa(unsigned long addr); +/* extern unsigned long mm_ptov(unsigned long addr) \ + __attribute__ ((const)); TBD */ + +/* Values for nocacheflag and cmode */ +/* These are not used by the APUS kernel_map, but prevents + * compilation errors. + */ +#define IOMAP_FULL_CACHING 0 +#define IOMAP_NOCACHE_SER 1 +#define IOMAP_NOCACHE_NONSER 2 +#define IOMAP_NO_COPYBACK 3 + +/* + * Map some physical address range into the kernel address space. + */ +extern unsigned long kernel_map(unsigned long paddr, unsigned long size, + int nocacheflag, unsigned long *memavailp); + +/* + * Set cache mode of (kernel space) address range. + */ +extern void kernel_set_cachemode(unsigned long address, unsigned long size, + unsigned int cmode); + +/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ +#define kern_addr_valid(addr) (1) + +#define io_remap_page_range remap_page_range + +/* + * No page table caches to initialise + */ +#define pgtable_cache_init() do { } while (0) + +void do_page_fault(struct pt_regs *regs, unsigned long address, + unsigned long error_code); + +void __init io_block_mapping(unsigned long virt, phys_addr_t phys, + unsigned int size, int flags); + +void __init adjust_total_lowmem(void); +void mapin_ram(void); +int map_page(unsigned long va, phys_addr_t pa, int flags); + +extern int mem_init_done; +extern unsigned long ioremap_base; +extern unsigned long ioremap_bot; + +asmlinkage void __init mmu_init(void); + +void __init *early_get_page(void); + +void *consistent_alloc(int gfp, size_t size, dma_addr_t *dma_handle); +void consistent_free(void *vaddr); +void consistent_sync(void *vaddr, size_t size, int direction); +void consistent_sync_page(struct page *page, unsigned long offset, + size_t size, int direction); +#endif /* __ASSEMBLY__ */ +#endif /* __KERNEL__ */ + +#endif /* CONFIG_MMU */ + #ifndef __ASSEMBLY__ #include <asm-generic/pgtable.h> diff --git a/arch/microblaze/include/asm/posix_types.h b/arch/microblaze/include/asm/posix_types.h index b4df41c5dde2..8c758b231f37 100644 --- a/arch/microblaze/include/asm/posix_types.h +++ b/arch/microblaze/include/asm/posix_types.h @@ -16,7 +16,7 @@ */ typedef unsigned long __kernel_ino_t; -typedef unsigned int __kernel_mode_t; +typedef unsigned short __kernel_mode_t; typedef unsigned int __kernel_nlink_t; typedef long __kernel_off_t; typedef int __kernel_pid_t; diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index 9329029d2614..563c6b9453f0 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -1,6 +1,6 @@ /* - * Copyright (C) 2008 Michal Simek - * Copyright (C) 2008 PetaLogix + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -26,14 +26,15 @@ extern const struct seq_operations cpuinfo_op; # define cpu_sleep() do {} while (0) # define prepare_to_copy(tsk) do {} while (0) -# endif /* __ASSEMBLY__ */ - #define task_pt_regs(tsk) \ (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) /* Do necessary setup to start up a newly executed thread. */ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp); +# endif /* __ASSEMBLY__ */ + +# ifndef CONFIG_MMU /* * User space process size: memory size * @@ -85,4 +86,90 @@ extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); # define KSTK_EIP(tsk) (0) # define KSTK_ESP(tsk) (0) +# else /* CONFIG_MMU */ + +/* + * This is used to define STACK_TOP, and with MMU it must be below + * kernel base to select the correct PGD when handling MMU exceptions. + */ +# define TASK_SIZE (CONFIG_KERNEL_START) + +/* + * This decides where the kernel will search for a free chunk of vm + * space during mmap's. + */ +# define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3) + +# define THREAD_KSP 0 + +# ifndef __ASSEMBLY__ + +/* + * Default implementation of macro that returns current + * instruction pointer ("program counter"). + */ +# define current_text_addr() ({ __label__ _l; _l: &&_l; }) + +/* If you change this, you must change the associated assembly-languages + * constants defined below, THREAD_*. + */ +struct thread_struct { + /* kernel stack pointer (must be first field in structure) */ + unsigned long ksp; + unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */ + void *pgdir; /* root of page-table tree */ + struct pt_regs *regs; /* Pointer to saved register state */ +}; + +# define INIT_THREAD { \ + .ksp = sizeof init_stack + (unsigned long)init_stack, \ + .pgdir = swapper_pg_dir, \ +} + +/* Do necessary setup to start up a newly executed thread. */ +void start_thread(struct pt_regs *regs, + unsigned long pc, unsigned long usp); + +/* Free all resources held by a thread. */ +extern inline void release_thread(struct task_struct *dead_task) +{ +} + +extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); + +/* Free current thread data structures etc. */ +static inline void exit_thread(void) +{ +} + +/* Return saved (kernel) PC of a blocked thread. */ +# define thread_saved_pc(tsk) \ + ((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0) + +unsigned long get_wchan(struct task_struct *p); + +/* The size allocated for kernel stacks. This _must_ be a power of two! */ +# define KERNEL_STACK_SIZE 0x2000 + +/* Return some info about the user process TASK. */ +# define task_tos(task) ((unsigned long)(task) + KERNEL_STACK_SIZE) +# define task_regs(task) ((struct pt_regs *)task_tos(task) - 1) + +# define task_pt_regs_plus_args(tsk) \ + (((void *)task_pt_regs(tsk)) - STATE_SAVE_ARG_SPACE) + +# define task_sp(task) (task_regs(task)->r1) +# define task_pc(task) (task_regs(task)->pc) +/* Grotty old names for some. */ +# define KSTK_EIP(task) (task_pc(task)) +# define KSTK_ESP(task) (task_sp(task)) + +/* FIXME */ +# define deactivate_mm(tsk, mm) do { } while (0) + +# define STACK_TOP TASK_SIZE +# define STACK_TOP_MAX STACK_TOP + +# endif /* __ASSEMBLY__ */ +# endif /* CONFIG_MMU */ #endif /* _ASM_MICROBLAZE_PROCESSOR_H */ diff --git a/arch/microblaze/include/asm/ptrace.h b/arch/microblaze/include/asm/ptrace.h index 55015bce5e47..a917dc517736 100644 --- a/arch/microblaze/include/asm/ptrace.h +++ b/arch/microblaze/include/asm/ptrace.h @@ -10,7 +10,6 @@ #define _ASM_MICROBLAZE_PTRACE_H #ifndef __ASSEMBLY__ -#include <linux/types.h> typedef unsigned long microblaze_reg_t; diff --git a/arch/microblaze/include/asm/registers.h b/arch/microblaze/include/asm/registers.h index 834142d9356f..68c3afb73877 100644 --- a/arch/microblaze/include/asm/registers.h +++ b/arch/microblaze/include/asm/registers.h @@ -1,6 +1,6 @@ /* - * Copyright (C) 2008 Michal Simek - * Copyright (C) 2008 PetaLogix + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -30,4 +30,21 @@ #define FSR_UF (1<<1) /* Underflow */ #define FSR_DO (1<<0) /* Denormalized operand error */ +# ifdef CONFIG_MMU +/* Machine State Register (MSR) Fields */ +# define MSR_UM (1<<11) /* User Mode */ +# define MSR_UMS (1<<12) /* User Mode Save */ +# define MSR_VM (1<<13) /* Virtual Mode */ +# define MSR_VMS (1<<14) /* Virtual Mode Save */ + +# define MSR_KERNEL (MSR_EE | MSR_VM) +/* # define MSR_USER (MSR_KERNEL | MSR_UM | MSR_IE) */ +# define MSR_KERNEL_VMS (MSR_EE | MSR_VMS) +/* # define MSR_USER_VMS (MSR_KERNEL_VMS | MSR_UMS | MSR_IE) */ + +/* Exception State Register (ESR) Fields */ +# define ESR_DIZ (1<<11) /* Zone Protection */ +# define ESR_S (1<<10) /* Store instruction */ + +# endif /* CONFIG_MMU */ #endif /* _ASM_MICROBLAZE_REGISTERS_H */ diff --git a/arch/microblaze/include/asm/sections.h b/arch/microblaze/include/asm/sections.h index 8434a43e5421..4487e150b455 100644 --- a/arch/microblaze/include/asm/sections.h +++ b/arch/microblaze/include/asm/sections.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -14,6 +16,7 @@ # ifndef __ASSEMBLY__ extern char _ssbss[], _esbss[]; extern unsigned long __ivt_start[], __ivt_end[]; +extern char _etext[], _stext[]; # ifdef CONFIG_MTD_UCLINUX extern char *_ebss; diff --git a/arch/microblaze/include/asm/segment.h b/arch/microblaze/include/asm/segment.h index 7f5dcc56eea1..0e7102c3fb11 100644 --- a/arch/microblaze/include/asm/segment.h +++ b/arch/microblaze/include/asm/segment.h @@ -1,6 +1,6 @@ /* - * Copyright (C) 2008 Michal Simek - * Copyright (C) 2008 PetaLogix + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -11,7 +11,7 @@ #ifndef _ASM_MICROBLAZE_SEGMENT_H #define _ASM_MICROBLAZE_SEGMENT_H -#ifndef __ASSEMBLY__ +# ifndef __ASSEMBLY__ typedef struct { unsigned long seg; @@ -29,15 +29,21 @@ typedef struct { * * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal. */ -# define KERNEL_DS ((mm_segment_t){0}) +# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) + +# ifndef CONFIG_MMU +# define KERNEL_DS MAKE_MM_SEG(0) # define USER_DS KERNEL_DS +# else +# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF) +# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) +# endif # define get_ds() (KERNEL_DS) # define get_fs() (current_thread_info()->addr_limit) -# define set_fs(x) \ - do { current_thread_info()->addr_limit = (x); } while (0) +# define set_fs(val) (current_thread_info()->addr_limit = (val)) -# define segment_eq(a, b) ((a).seg == (b).seg) +# define segment_eq(a, b) ((a).seg == (b).seg) # endif /* __ASSEMBLY__ */ #endif /* _ASM_MICROBLAZE_SEGMENT_H */ diff --git a/arch/microblaze/include/asm/setup.h b/arch/microblaze/include/asm/setup.h index 9b98e8e6abae..27f8dafd8c34 100644 --- a/arch/microblaze/include/asm/setup.h +++ b/arch/microblaze/include/asm/setup.h @@ -1,5 +1,6 @@ /* - * Copyright (C) 2007-2008 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2007-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -18,7 +19,6 @@ extern unsigned int boot_cpuid; /* move to smp.h */ extern char cmd_line[COMMAND_LINE_SIZE]; -# endif/* __KERNEL__ */ void early_printk(const char *fmt, ...); @@ -30,6 +30,11 @@ void setup_heartbeat(void); unsigned long long sched_clock(void); +# ifdef CONFIG_MMU +extern void mmu_reset(void); +extern void early_console_reg_tlb_alloc(unsigned int addr); +# endif /* CONFIG_MMU */ + void time_init(void); void init_IRQ(void); void machine_early_init(const char *cmdline, unsigned int ram, @@ -40,5 +45,6 @@ void machine_shutdown(void); void machine_halt(void); void machine_power_off(void); +# endif/* __KERNEL__ */ # endif /* __ASSEMBLY__ */ #endif /* _ASM_MICROBLAZE_SETUP_H */ diff --git a/arch/microblaze/include/asm/stat.h b/arch/microblaze/include/asm/stat.h index 5f18b8aed220..a15f77520bfd 100644 --- a/arch/microblaze/include/asm/stat.h +++ b/arch/microblaze/include/asm/stat.h @@ -16,58 +16,53 @@ #include <linux/posix_types.h> +#define STAT_HAVE_NSEC 1 + struct stat { - unsigned int st_dev; + unsigned long st_dev; unsigned long st_ino; unsigned int st_mode; unsigned int st_nlink; unsigned int st_uid; unsigned int st_gid; - unsigned int st_rdev; - unsigned long st_size; - unsigned long st_blksize; - unsigned long st_blocks; - unsigned long st_atime; - unsigned long __unused1; /* unsigned long st_atime_nsec */ - unsigned long st_mtime; - unsigned long __unused2; /* unsigned long st_mtime_nsec */ - unsigned long st_ctime; - unsigned long __unused3; /* unsigned long st_ctime_nsec */ + unsigned long st_rdev; + unsigned long __pad1; + long st_size; + int st_blksize; + int __pad2; + long st_blocks; + int st_atime; + unsigned int st_atime_nsec; + int st_mtime; + unsigned int st_mtime_nsec; + int st_ctime; + unsigned int st_ctime_nsec; unsigned long __unused4; unsigned long __unused5; }; struct stat64 { - unsigned long long st_dev; - unsigned long __unused1; - - unsigned long long st_ino; - - unsigned int st_mode; - unsigned int st_nlink; - - unsigned int st_uid; - unsigned int st_gid; - - unsigned long long st_rdev; - unsigned long __unused3; - - long long st_size; - unsigned long st_blksize; - - unsigned long st_blocks; /* No. of 512-byte blocks allocated */ - unsigned long __unused4; /* future possible st_blocks high bits */ - - unsigned long st_atime; - unsigned long st_atime_nsec; - - unsigned long st_mtime; - unsigned long st_mtime_nsec; - - unsigned long st_ctime; - unsigned long st_ctime_nsec; - - unsigned long __unused8; + unsigned long long st_dev; /* Device. */ + unsigned long long st_ino; /* File serial number. */ + unsigned int st_mode; /* File mode. */ + unsigned int st_nlink; /* Link count. */ + unsigned int st_uid; /* User ID of the file's owner. */ + unsigned int st_gid; /* Group ID of the file's group. */ + unsigned long long st_rdev; /* Device number, if device. */ + unsigned long long __pad1; + long long st_size; /* Size of file, in bytes. */ + int st_blksize; /* Optimal block size for I/O. */ + int __pad2; + long long st_blocks; /* Number 512-byte blocks allocated. */ + int st_atime; /* Time of last access. */ + unsigned int st_atime_nsec; + int st_mtime; /* Time of last modification. */ + unsigned int st_mtime_nsec; + int st_ctime; /* Time of last status change. */ + unsigned int st_ctime_nsec; + unsigned int __unused4; + unsigned int __unused5; }; #endif /* _ASM_MICROBLAZE_STAT_H */ + diff --git a/arch/microblaze/include/asm/string.h b/arch/microblaze/include/asm/string.h index f7728c90fc18..aec2f59298b8 100644 --- a/arch/microblaze/include/asm/string.h +++ b/arch/microblaze/include/asm/string.h @@ -9,7 +9,7 @@ #ifndef _ASM_MICROBLAZE_STRING_H #define _ASM_MICROBLAZE_STRING_H -#ifndef __KERNEL__ +#ifdef __KERNEL__ #define __HAVE_ARCH_MEMSET #define __HAVE_ARCH_MEMCPY diff --git a/arch/microblaze/include/asm/syscalls.h b/arch/microblaze/include/asm/syscalls.h index 9cb4ff0edeb2..ddea9eb31f8d 100644 --- a/arch/microblaze/include/asm/syscalls.h +++ b/arch/microblaze/include/asm/syscalls.h @@ -34,6 +34,9 @@ asmlinkage int sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize, asmlinkage int sys_sigaction(int sig, const struct old_sigaction *act, struct old_sigaction *oact); +asmlinkage long sys_rt_sigaction(int sig, const struct sigaction __user *act, + struct sigaction __user *oact, size_t sigsetsize); + asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, struct pt_regs *regs); diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h index 4c3943e3f403..7fac44498445 100644 --- a/arch/microblaze/include/asm/thread_info.h +++ b/arch/microblaze/include/asm/thread_info.h @@ -122,6 +122,8 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SINGLESTEP 4 #define TIF_IRET 5 /* return with iret */ #define TIF_MEMDIE 6 +#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */ +#define TIF_SECCOMP 10 /* secure computing */ #define TIF_FREEZE 14 /* Freezing for suspend */ /* FIXME change in entry.S */ @@ -138,10 +140,17 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_IRET (1<<TIF_IRET) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) #define _TIF_FREEZE (1<<TIF_FREEZE) +#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) +#define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_KERNEL_TRACE (1 << TIF_KERNEL_TRACE) +/* work to do in syscall trace */ +#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ + _TIF_SYSCALL_AUDIT | _TIF_SECCOMP) + /* work to do on interrupt/exception return */ #define _TIF_WORK_MASK 0x0000FFFE + /* work to do on any return to u-space */ #define _TIF_ALLWORK_MASK 0x0000FFFF @@ -154,6 +163,17 @@ static inline struct thread_info *current_thread_info(void) */ /* FPU was used by this task this quantum (SMP) */ #define TS_USEDFPU 0x0001 +#define TS_RESTORE_SIGMASK 0x0002 + +#ifndef __ASSEMBLY__ +#define HAVE_SET_RESTORE_SIGMASK 1 +static inline void set_restore_sigmask(void) +{ + struct thread_info *ti = current_thread_info(); + ti->status |= TS_RESTORE_SIGMASK; + set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags); +} +#endif #endif /* __KERNEL__ */ #endif /* _ASM_MICROBLAZE_THREAD_INFO_H */ diff --git a/arch/microblaze/include/asm/tlb.h b/arch/microblaze/include/asm/tlb.h index d1dfe3791127..c472d2801132 100644 --- a/arch/microblaze/include/asm/tlb.h +++ b/arch/microblaze/include/asm/tlb.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -13,4 +15,10 @@ #include <asm-generic/tlb.h> +#ifdef CONFIG_MMU +#define tlb_start_vma(tlb, vma) do { } while (0) +#define tlb_end_vma(tlb, vma) do { } while (0) +#define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0) +#endif + #endif /* _ASM_MICROBLAZE_TLB_H */ diff --git a/arch/microblaze/include/asm/tlbflush.h b/arch/microblaze/include/asm/tlbflush.h index d7fe7629001b..eb31a0e8a772 100644 --- a/arch/microblaze/include/asm/tlbflush.h +++ b/arch/microblaze/include/asm/tlbflush.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -9,6 +11,50 @@ #ifndef _ASM_MICROBLAZE_TLBFLUSH_H #define _ASM_MICROBLAZE_TLBFLUSH_H +#ifdef CONFIG_MMU + +#include <linux/sched.h> +#include <linux/threads.h> +#include <asm/processor.h> /* For TASK_SIZE */ +#include <asm/mmu.h> +#include <asm/page.h> +#include <asm/pgalloc.h> + +extern void _tlbie(unsigned long address); +extern void _tlbia(void); + +#define __tlbia() _tlbia() + +static inline void local_flush_tlb_all(void) + { __tlbia(); } +static inline void local_flush_tlb_mm(struct mm_struct *mm) + { __tlbia(); } +static inline void local_flush_tlb_page(struct vm_area_struct *vma, + unsigned long vmaddr) + { _tlbie(vmaddr); } +static inline void local_flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) + { __tlbia(); } + +#define flush_tlb_kernel_range(start, end) do { } while (0) + +#define update_mmu_cache(vma, addr, pte) do { } while (0) + +#define flush_tlb_all local_flush_tlb_all +#define flush_tlb_mm local_flush_tlb_mm +#define flush_tlb_page local_flush_tlb_page +#define flush_tlb_range local_flush_tlb_range + +/* + * This is called in munmap when we have freed up some page-table + * pages. We don't need to do anything here, there's nothing special + * about our page-table pages. -- paulus + */ +static inline void flush_tlb_pgtables(struct mm_struct *mm, + unsigned long start, unsigned long end) { } + +#else /* CONFIG_MMU */ + #define flush_tlb() BUG() #define flush_tlb_all() BUG() #define flush_tlb_mm(mm) BUG() @@ -17,4 +63,6 @@ #define flush_tlb_pgtables(mm, start, end) BUG() #define flush_tlb_kernel_range(start, end) BUG() +#endif /* CONFIG_MMU */ + #endif /* _ASM_MICROBLAZE_TLBFLUSH_H */ diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h index 5a3ffc308e12..65adad61e7e9 100644 --- a/arch/microblaze/include/asm/uaccess.h +++ b/arch/microblaze/include/asm/uaccess.h @@ -1,4 +1,6 @@ /* + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public @@ -26,6 +28,10 @@ #define VERIFY_READ 0 #define VERIFY_WRITE 1 +#define __clear_user(addr, n) (memset((void *)(addr), 0, (n)), 0) + +#ifndef CONFIG_MMU + extern int ___range_ok(unsigned long addr, unsigned long size); #define __range_ok(addr, size) \ @@ -34,68 +40,68 @@ extern int ___range_ok(unsigned long addr, unsigned long size); #define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0) #define __access_ok(add, size) (__range_ok((addr), (size)) == 0) -extern inline int bad_user_access_length(void) -{ - return 0; -} +/* Undefined function to trigger linker error */ +extern int bad_user_access_length(void); + /* FIXME this is function for optimalization -> memcpy */ -#define __get_user(var, ptr) \ - ({ \ - int __gu_err = 0; \ - switch (sizeof(*(ptr))) { \ - case 1: \ - case 2: \ - case 4: \ - (var) = *(ptr); \ - break; \ - case 8: \ - memcpy((void *) &(var), (ptr), 8); \ - break; \ - default: \ - (var) = 0; \ - __gu_err = __get_user_bad(); \ - break; \ - } \ - __gu_err; \ - }) +#define __get_user(var, ptr) \ +({ \ + int __gu_err = 0; \ + switch (sizeof(*(ptr))) { \ + case 1: \ + case 2: \ + case 4: \ + (var) = *(ptr); \ + break; \ + case 8: \ + memcpy((void *) &(var), (ptr), 8); \ + break; \ + default: \ + (var) = 0; \ + __gu_err = __get_user_bad(); \ + break; \ + } \ + __gu_err; \ +}) #define __get_user_bad() (bad_user_access_length(), (-EFAULT)) +/* FIXME is not there defined __pu_val */ #define __put_user(var, ptr) \ - ({ \ - int __pu_err = 0; \ - switch (sizeof(*(ptr))) { \ - case 1: \ - case 2: \ - case 4: \ - *(ptr) = (var); \ - break; \ - case 8: { \ - typeof(*(ptr)) __pu_val = var; \ - memcpy(ptr, &__pu_val, sizeof(__pu_val));\ - } \ - break; \ - default: \ - __pu_err = __put_user_bad(); \ - break; \ - } \ - __pu_err; \ - }) +({ \ + int __pu_err = 0; \ + switch (sizeof(*(ptr))) { \ + case 1: \ + case 2: \ + case 4: \ + *(ptr) = (var); \ + break; \ + case 8: { \ + typeof(*(ptr)) __pu_val = (var); \ + memcpy(ptr, &__pu_val, sizeof(__pu_val)); \ + } \ + break; \ + default: \ + __pu_err = __put_user_bad(); \ + break; \ + } \ + __pu_err; \ +}) #define __put_user_bad() (bad_user_access_length(), (-EFAULT)) -#define put_user(x, ptr) __put_user(x, ptr) -#define get_user(x, ptr) __get_user(x, ptr) +#define put_user(x, ptr) __put_user((x), (ptr)) +#define get_user(x, ptr) __get_user((x), (ptr)) -#define copy_to_user(to, from, n) (memcpy(to, from, n), 0) -#define copy_from_user(to, from, n) (memcpy(to, from, n), 0) +#define copy_to_user(to, from, n) (memcpy((to), (from), (n)), 0) +#define copy_from_user(to, from, n) (memcpy((to), (from), (n)), 0) -#define __copy_to_user(to, from, n) (copy_to_user(to, from, n)) -#define __copy_from_user(to, from, n) (copy_from_user(to, from, n)) -#define __copy_to_user_inatomic(to, from, n) (__copy_to_user(to, from, n)) -#define __copy_from_user_inatomic(to, from, n) (__copy_from_user(to, from, n)) - -#define __clear_user(addr, n) (memset((void *)addr, 0, n), 0) +#define __copy_to_user(to, from, n) (copy_to_user((to), (from), (n))) +#define __copy_from_user(to, from, n) (copy_from_user((to), (from), (n))) +#define __copy_to_user_inatomic(to, from, n) \ + (__copy_to_user((to), (from), (n))) +#define __copy_from_user_inatomic(to, from, n) \ + (__copy_from_user((to), (from), (n))) static inline unsigned long clear_user(void *addr, unsigned long size) { @@ -104,13 +110,200 @@ static inline unsigned long clear_user(void *addr, unsigned long size) return size; } -/* Returns 0 if exception not found and fixup otherwise. */ +/* Returns 0 if exception not found and fixup otherwise. */ extern unsigned long search_exception_table(unsigned long); +extern long strncpy_from_user(char *dst, const char *src, long count); +extern long strnlen_user(const char *src, long count); + +#else /* CONFIG_MMU */ + +/* + * Address is valid if: + * - "addr", "addr + size" and "size" are all below the limit + */ +#define access_ok(type, addr, size) \ + (get_fs().seg > (((unsigned long)(addr)) | \ + (size) | ((unsigned long)(addr) + (size)))) + +/* || printk("access_ok failed for %s at 0x%08lx (size %d), seg 0x%08x\n", + type?"WRITE":"READ",addr,size,get_fs().seg)) */ + +/* + * All the __XXX versions macros/functions below do not perform + * access checking. It is assumed that the necessary checks have been + * already performed before the finction (macro) is called. + */ + +#define get_user(x, ptr) \ +({ \ + access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \ + ? __get_user((x), (ptr)) : -EFAULT; \ +}) + +#define put_user(x, ptr) \ +({ \ + access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \ + ? __put_user((x), (ptr)) : -EFAULT; \ +}) + +#define __get_user(x, ptr) \ +({ \ + unsigned long __gu_val; \ + /*unsigned long __gu_ptr = (unsigned long)(ptr);*/ \ + long __gu_err; \ + switch (sizeof(*(ptr))) { \ + case 1: \ + __get_user_asm("lbu", (ptr), __gu_val, __gu_err); \ + break; \ + case 2: \ + __get_user_asm("lhu", (ptr), __gu_val, __gu_err); \ + break; \ + case 4: \ + __get_user_asm("lw", (ptr), __gu_val, __gu_err); \ + break; \ + default: \ + __gu_val = 0; __gu_err = -EINVAL; \ + } \ + x = (__typeof__(*(ptr))) __gu_val; \ + __gu_err; \ +}) + +#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ +({ \ + __asm__ __volatile__ ( \ + "1:" insn " %1, %2, r0; \ + addk %0, r0, r0; \ + 2: \ + .section .fixup,\"ax\"; \ + 3: brid 2b; \ + addik %0, r0, %3; \ + .previous; \ + .section __ex_table,\"a\"; \ + .word 1b,3b; \ + .previous;" \ + : "=r"(__gu_err), "=r"(__gu_val) \ + : "r"(__gu_ptr), "i"(-EFAULT) \ + ); \ +}) + +#define __put_user(x, ptr) \ +({ \ + __typeof__(*(ptr)) __gu_val = x; \ + long __gu_err = 0; \ + switch (sizeof(__gu_val)) { \ + case 1: \ + __put_user_asm("sb", (ptr), __gu_val, __gu_err); \ + break; \ + case 2: \ + __put_user_asm("sh", (ptr), __gu_val, __gu_err); \ + break; \ + case 4: \ + __put_user_asm("sw", (ptr), __gu_val, __gu_err); \ + break; \ + case 8: \ + __put_user_asm_8((ptr), __gu_val, __gu_err); \ + break; \ + default: \ + __gu_err = -EINVAL; \ + } \ + __gu_err; \ +}) + +#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \ +({ \ +__asm__ __volatile__ (" lwi %0, %1, 0; \ + 1: swi %0, %2, 0; \ + lwi %0, %1, 4; \ + 2: swi %0, %2, 4; \ + addk %0,r0,r0; \ + 3: \ + .section .fixup,\"ax\"; \ + 4: brid 3b; \ + addik %0, r0, %3; \ + .previous; \ + .section __ex_table,\"a\"; \ + .word 1b,4b,2b,4b; \ + .previous;" \ + : "=&r"(__gu_err) \ + : "r"(&__gu_val), \ + "r"(__gu_ptr), "i"(-EFAULT) \ + ); \ +}) + +#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ +({ \ + __asm__ __volatile__ ( \ + "1:" insn " %1, %2, r0; \ + addk %0, r0, r0; \ + 2: \ + .section .fixup,\"ax\"; \ + 3: brid 2b; \ + addik %0, r0, %3; \ + .previous; \ + .section __ex_table,\"a\"; \ + .word 1b,3b; \ + .previous;" \ + : "=r"(__gu_err) \ + : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \ + ); \ +}) + +/* + * Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. + */ +static inline int clear_user(char *to, int size) +{ + if (size && access_ok(VERIFY_WRITE, to, size)) { + __asm__ __volatile__ (" \ + 1: \ + sb r0, %2, r0; \ + addik %0, %0, -1; \ + bneid %0, 1b; \ + addik %2, %2, 1; \ + 2: \ + .section __ex_table,\"a\"; \ + .word 1b,2b; \ + .section .text;" \ + : "=r"(size) \ + : "0"(size), "r"(to) + ); + } + return size; +} + +extern unsigned long __copy_tofrom_user(void __user *to, + const void __user *from, unsigned long size); + +#define copy_to_user(to, from, n) \ + (access_ok(VERIFY_WRITE, (to), (n)) ? \ + __copy_tofrom_user((void __user *)(to), \ + (__force const void __user *)(from), (n)) \ + : -EFAULT) + +#define __copy_to_user(to, from, n) copy_to_user((to), (from), (n)) +#define __copy_to_user_inatomic(to, from, n) copy_to_user((to), (from), (n)) + +#define copy_from_user(to, from, n) \ + (access_ok(VERIFY_READ, (from), (n)) ? \ + __copy_tofrom_user((__force void __user *)(to), \ + (void __user *)(from), (n)) \ + : -EFAULT) + +#define __copy_from_user(to, from, n) copy_from_user((to), (from), (n)) +#define __copy_from_user_inatomic(to, from, n) \ + copy_from_user((to), (from), (n)) + +extern int __strncpy_user(char *to, const char __user *from, int len); +extern int __strnlen_user(const char __user *sstr, int len); + +#define strncpy_from_user(to, from, len) \ + (access_ok(VERIFY_READ, from, 1) ? \ + __strncpy_user(to, from, len) : -EFAULT) +#define strnlen_user(str, len) \ + (access_ok(VERIFY_READ, str, 1) ? __strnlen_user(str, len) : 0) -extern long strncpy_from_user(char *dst, const char __user *src, long count); -extern long strnlen_user(const char __user *src, long count); -extern long __strncpy_from_user(char *dst, const char __user *src, long count); +#endif /* CONFIG_MMU */ /* * The exception table consists of pairs of addresses: the first is the diff --git a/arch/microblaze/include/asm/unaligned.h b/arch/microblaze/include/asm/unaligned.h index 9d66b640c910..3658d91ac0fb 100644 --- a/arch/microblaze/include/asm/unaligned.h +++ b/arch/microblaze/include/asm/unaligned.h @@ -12,7 +12,8 @@ # ifdef __KERNEL__ -# include <linux/unaligned/access_ok.h> +# include <linux/unaligned/be_struct.h> +# include <linux/unaligned/le_byteshift.h> # include <linux/unaligned/generic.h> # define get_unaligned __get_unaligned_be diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile index da94bec4ecba..f4a5e19a20eb 100644 --- a/arch/microblaze/kernel/Makefile +++ b/arch/microblaze/kernel/Makefile @@ -15,5 +15,6 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_SELFMOD) += selfmod.o obj-$(CONFIG_HEART_BEAT) += heartbeat.o obj-$(CONFIG_MODULES) += microblaze_ksyms.o module.o +obj-$(CONFIG_MMU) += misc.o obj-y += entry$(MMUEXT).o diff --git a/arch/microblaze/kernel/asm-offsets.c b/arch/microblaze/kernel/asm-offsets.c index aabd9e9423a6..7bc7b68f97db 100644 --- a/arch/microblaze/kernel/asm-offsets.c +++ b/arch/microblaze/kernel/asm-offsets.c @@ -1,4 +1,5 @@ /* + * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> * Copyright (C) 2007-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * @@ -68,16 +69,26 @@ int main(int argc, char *argv[]) /* struct task_struct */ DEFINE(TS_THREAD_INFO, offsetof(struct task_struct, stack)); +#ifdef CONFIG_MMU + DEFINE(TASK_STATE, offsetof(struct task_struct, state)); + DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags)); + DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace)); + DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked)); + DEFINE(TASK_MM, offsetof(struct task_struct, mm)); + DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm)); + DEFINE(TASK_PID, offsetof(struct task_struct, pid)); + DEFINE(TASK_THREAD, offsetof(struct task_struct, thread)); + DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp)); + BLANK(); + + DEFINE(PGDIR, offsetof(struct thread_struct, pgdir)); + BLANK(); +#endif /* struct thread_info */ DEFINE(TI_TASK, offsetof(struct thread_info, task)); - DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain)); DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); - DEFINE(TI_STATUS, offsetof(struct thread_info, status)); - DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); - DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count)); DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); - DEFINE(TI_RESTART_BLOCK, offsetof(struct thread_info, restart_block)); DEFINE(TI_CPU_CONTEXT, offsetof(struct thread_info, cpu_context)); BLANK(); diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c index 4b0f0fdb9ca0..7de84923ba07 100644 --- a/arch/microblaze/kernel/early_printk.c +++ b/arch/microblaze/kernel/early_printk.c @@ -87,6 +87,9 @@ int __init setup_early_printk(char *opt) base_addr = early_uartlite_console(); if (base_addr) { early_console_initialized = 1; +#ifdef CONFIG_MMU + early_console_reg_tlb_alloc(base_addr); +#endif early_printk("early_printk_console is enabled at 0x%08x\n", base_addr); diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S index f24b1268baaf..1fce6b803f54 100644 --- a/arch/microblaze/kernel/entry-nommu.S +++ b/arch/microblaze/kernel/entry-nommu.S @@ -10,7 +10,7 @@ #include <linux/linkage.h> #include <asm/thread_info.h> -#include <asm/errno.h> +#include <linux/errno.h> #include <asm/entry.h> #include <asm/asm-offsets.h> #include <asm/registers.h> diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S new file mode 100644 index 000000000000..91a0e7b185dd --- /dev/null +++ b/arch/microblaze/kernel/entry.S @@ -0,0 +1,1116 @@ +/* + * Low-level system-call handling, trap handlers and context-switching + * + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au> + * Copyright (C) 2001,2002 NEC Corporation + * Copyright (C) 2001,2002 Miles Bader <miles@gnu.org> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + * Written by Miles Bader <miles@gnu.org> + * Heavily modified by John Williams for Microblaze + */ + +#include <linux/sys.h> +#include <linux/linkage.h> + +#include <asm/entry.h> +#include <asm/current.h> +#include <asm/processor.h> +#include <asm/exceptions.h> +#include <asm/asm-offsets.h> +#include <asm/thread_info.h> + +#include <asm/page.h> +#include <asm/unistd.h> + +#include <linux/errno.h> +#include <asm/signal.h> + +/* The size of a state save frame. */ +#define STATE_SAVE_SIZE (PT_SIZE + STATE_SAVE_ARG_SPACE) + +/* The offset of the struct pt_regs in a `state save frame' on the stack. */ +#define PTO STATE_SAVE_ARG_SPACE /* 24 the space for args */ + +#define C_ENTRY(name) .globl name; .align 4; name + +/* + * Various ways of setting and clearing BIP in flags reg. + * This is mucky, but necessary using microblaze version that + * allows msr ops to write to BIP + */ +#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR + .macro clear_bip + msrclr r11, MSR_BIP + nop + .endm + + .macro set_bip + msrset r11, MSR_BIP + nop + .endm + + .macro clear_eip + msrclr r11, MSR_EIP + nop + .endm + + .macro set_ee + msrset r11, MSR_EE + nop + .endm + + .macro disable_irq + msrclr r11, MSR_IE + nop + .endm + + .macro enable_irq + msrset r11, MSR_IE + nop + .endm + + .macro set_ums + msrset r11, MSR_UMS + nop + msrclr r11, MSR_VMS + nop + .endm + + .macro set_vms + msrclr r11, MSR_UMS + nop + msrset r11, MSR_VMS + nop + .endm + + .macro clear_vms_ums + msrclr r11, MSR_VMS + nop + msrclr r11, MSR_UMS + nop + .endm +#else + .macro clear_bip + mfs r11, rmsr + nop + andi r11, r11, ~MSR_BIP + mts rmsr, r11 + nop + .endm + + .macro set_bip + mfs r11, rmsr + nop + ori r11, r11, MSR_BIP + mts rmsr, r11 + nop + .endm + + .macro clear_eip + mfs r11, rmsr + nop + andi r11, r11, ~MSR_EIP + mts rmsr, r11 + nop + .endm + + .macro set_ee + mfs r11, rmsr + nop + ori r11, r11, MSR_EE + mts rmsr, r11 + nop + .endm + + .macro disable_irq + mfs r11, rmsr + nop + andi r11, r11, ~MSR_IE + mts rmsr, r11 + nop + .endm + + .macro enable_irq + mfs r11, rmsr + nop + ori r11, r11, MSR_IE + mts rmsr, r11 + nop + .endm + + .macro set_ums + mfs r11, rmsr + nop + ori r11, r11, MSR_VMS + andni r11, r11, MSR_UMS + mts rmsr, r11 + nop + .endm + + .macro set_vms + mfs r11, rmsr + nop + ori r11, r11, MSR_VMS + andni r11, r11, MSR_UMS + mts rmsr, r11 + nop + .endm + + .macro clear_vms_ums + mfs r11, rmsr + nop + andni r11, r11, (MSR_VMS|MSR_UMS) + mts rmsr,r11 + nop + .endm +#endif + +/* Define how to call high-level functions. With MMU, virtual mode must be + * enabled when calling the high-level function. Clobbers R11. + * VM_ON, VM_OFF, DO_JUMP_BIPCLR, DO_CALL + */ + +/* turn on virtual protected mode save */ +#define VM_ON \ + set_ums; \ + rted r0, 2f; \ +2: nop; + +/* turn off virtual protected mode save and user mode save*/ +#define VM_OFF \ + clear_vms_ums; \ + rted r0, TOPHYS(1f); \ +1: nop; + +#define SAVE_REGS \ + swi r2, r1, PTO+PT_R2; /* Save SDA */ \ + swi r5, r1, PTO+PT_R5; \ + swi r6, r1, PTO+PT_R6; \ + swi r7, r1, PTO+PT_R7; \ + swi r8, r1, PTO+PT_R8; \ + swi r9, r1, PTO+PT_R9; \ + swi r10, r1, PTO+PT_R10; \ + swi r11, r1, PTO+PT_R11; /* save clobbered regs after rval */\ + swi r12, r1, PTO+PT_R12; \ + swi r13, r1, PTO+PT_R13; /* Save SDA2 */ \ + swi r14, r1, PTO+PT_PC; /* PC, before IRQ/trap */ \ + swi r15, r1, PTO+PT_R15; /* Save LP */ \ + swi r18, r1, PTO+PT_R18; /* Save asm scratch reg */ \ + swi r19, r1, PTO+PT_R19; \ + swi r20, r1, PTO+PT_R20; \ + swi r21, r1, PTO+PT_R21; \ + swi r22, r1, PTO+PT_R22; \ + swi r23, r1, PTO+PT_R23; \ + swi r24, r1, PTO+PT_R24; \ + swi r25, r1, PTO+PT_R25; \ + swi r26, r1, PTO+PT_R26; \ + swi r27, r1, PTO+PT_R27; \ + swi r28, r1, PTO+PT_R28; \ + swi r29, r1, PTO+PT_R29; \ + swi r30, r1, PTO+PT_R30; \ + swi r31, r1, PTO+PT_R31; /* Save current task reg */ \ + mfs r11, rmsr; /* save MSR */ \ + nop; \ + swi r11, r1, PTO+PT_MSR; + +#define RESTORE_REGS \ + lwi r11, r1, PTO+PT_MSR; \ + mts rmsr , r11; \ + nop; \ + lwi r2, r1, PTO+PT_R2; /* restore SDA */ \ + lwi r5, r1, PTO+PT_R5; \ + lwi r6, r1, PTO+PT_R6; \ + lwi r7, r1, PTO+PT_R7; \ + lwi r8, r1, PTO+PT_R8; \ + lwi r9, r1, PTO+PT_R9; \ + lwi r10, r1, PTO+PT_R10; \ + lwi r11, r1, PTO+PT_R11; /* restore clobbered regs after rval */\ + lwi r12, r1, PTO+PT_R12; \ + lwi r13, r1, PTO+PT_R13; /* restore SDA2 */ \ + lwi r14, r1, PTO+PT_PC; /* RESTORE_LINK PC, before IRQ/trap */\ + lwi r15, r1, PTO+PT_R15; /* restore LP */ \ + lwi r18, r1, PTO+PT_R18; /* restore asm scratch reg */ \ + lwi r19, r1, PTO+PT_R19; \ + lwi r20, r1, PTO+PT_R20; \ + lwi r21, r1, PTO+PT_R21; \ + lwi r22, r1, PTO+PT_R22; \ + lwi r23, r1, PTO+PT_R23; \ + lwi r24, r1, PTO+PT_R24; \ + lwi r25, r1, PTO+PT_R25; \ + lwi r26, r1, PTO+PT_R26; \ + lwi r27, r1, PTO+PT_R27; \ + lwi r28, r1, PTO+PT_R28; \ + lwi r29, r1, PTO+PT_R29; \ + lwi r30, r1, PTO+PT_R30; \ + lwi r31, r1, PTO+PT_R31; /* Restore cur task reg */ + +.text + +/* + * User trap. + * + * System calls are handled here. + * + * Syscall protocol: + * Syscall number in r12, args in r5-r10 + * Return value in r3 + * + * Trap entered via brki instruction, so BIP bit is set, and interrupts + * are masked. This is nice, means we don't have to CLI before state save + */ +C_ENTRY(_user_exception): + swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */ + addi r14, r14, 4 /* return address is 4 byte after call */ + swi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* Save r11 */ + + lwi r11, r0, TOPHYS(PER_CPU(KM));/* See if already in kernel mode.*/ + beqi r11, 1f; /* Jump ahead if coming from user */ +/* Kernel-mode state save. */ + lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/ + tophys(r1,r11); + swi r11, r1, (PT_R1-PT_SIZE); /* Save original SP. */ + lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */ + + addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */ + SAVE_REGS + + addi r11, r0, 1; /* Was in kernel-mode. */ + swi r11, r1, PTO+PT_MODE; /* pt_regs -> kernel mode */ + brid 2f; + nop; /* Fill delay slot */ + +/* User-mode state save. */ +1: + lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */ + lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */ + tophys(r1,r1); + lwi r1, r1, TS_THREAD_INFO; /* get stack from task_struct */ +/* calculate kernel stack pointer from task struct 8k */ + addik r1, r1, THREAD_SIZE; + tophys(r1,r1); + + addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */ + SAVE_REGS + + swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ + lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); + swi r11, r1, PTO+PT_R1; /* Store user SP. */ + addi r11, r0, 1; + swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */ +2: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */ + /* Save away the syscall number. */ + swi r12, r1, PTO+PT_R0; + tovirt(r1,r1) + + la r15, r0, ret_from_trap-8 +/* where the trap should return need -8 to adjust for rtsd r15, 8*/ +/* Jump to the appropriate function for the system call number in r12 + * (r12 is not preserved), or return an error if r12 is not valid. The LP + * register should point to the location where + * the called function should return. [note that MAKE_SYS_CALL uses label 1] */ + /* See if the system call number is valid. */ + addi r11, r12, -__NR_syscalls; + bgei r11,1f; + /* Figure out which function to use for this system call. */ + /* Note Microblaze barrel shift is optional, so don't rely on it */ + add r12, r12, r12; /* convert num -> ptr */ + add r12, r12, r12; + + /* Trac syscalls and stored them to r0_ram */ + lwi r3, r12, 0x400 + TOPHYS(r0_ram) + addi r3, r3, 1 + swi r3, r12, 0x400 + TOPHYS(r0_ram) + + lwi r12, r12, TOPHYS(sys_call_table); /* Function ptr */ + /* Make the system call. to r12*/ + set_vms; + rtid r12, 0; + nop; + /* The syscall number is invalid, return an error. */ +1: VM_ON; /* RETURN() expects virtual mode*/ + addi r3, r0, -ENOSYS; + rtsd r15,8; /* looks like a normal subroutine return */ + or r0, r0, r0 + + +/* Entry point used to return from a syscall/trap. */ +/* We re-enable BIP bit before state restore */ +C_ENTRY(ret_from_trap): + set_bip; /* Ints masked for state restore*/ + lwi r11, r1, PTO+PT_MODE; +/* See if returning to kernel mode, if so, skip resched &c. */ + bnei r11, 2f; + + /* We're returning to user mode, so check for various conditions that + * trigger rescheduling. */ + /* Get current task ptr into r11 */ + add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, r11, TI_FLAGS; /* get flags in thread info */ + andi r11, r11, _TIF_NEED_RESCHED; + beqi r11, 5f; + + swi r3, r1, PTO + PT_R3; /* store syscall result */ + swi r4, r1, PTO + PT_R4; + bralid r15, schedule; /* Call scheduler */ + nop; /* delay slot */ + lwi r3, r1, PTO + PT_R3; /* restore syscall result */ + lwi r4, r1, PTO + PT_R4; + + /* Maybe handle a signal */ +5: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, r11, TI_FLAGS; /* get flags in thread info */ + andi r11, r11, _TIF_SIGPENDING; + beqi r11, 1f; /* Signals to handle, handle them */ + + swi r3, r1, PTO + PT_R3; /* store syscall result */ + swi r4, r1, PTO + PT_R4; + la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ + add r6, r0, r0; /* Arg 2: sigset_t *oldset */ + addi r7, r0, 1; /* Arg 3: int in_syscall */ + bralid r15, do_signal; /* Handle any signals */ + nop; + lwi r3, r1, PTO + PT_R3; /* restore syscall result */ + lwi r4, r1, PTO + PT_R4; + +/* Finally, return to user state. */ +1: swi r0, r0, PER_CPU(KM); /* Now officially in user state. */ + add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + swi r11, r0, PER_CPU(CURRENT_SAVE); /* save current */ + VM_OFF; + tophys(r1,r1); + RESTORE_REGS; + addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ + lwi r1, r1, PT_R1 - PT_SIZE;/* Restore user stack pointer. */ + bri 6f; + +/* Return to kernel state. */ +2: VM_OFF; + tophys(r1,r1); + RESTORE_REGS; + addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ + tovirt(r1,r1); +6: +TRAP_return: /* Make global symbol for debugging */ + rtbd r14, 0; /* Instructions to return from an IRQ */ + nop; + + +/* These syscalls need access to the struct pt_regs on the stack, so we + implement them in assembly (they're basically all wrappers anyway). */ + +C_ENTRY(sys_fork_wrapper): + addi r5, r0, SIGCHLD /* Arg 0: flags */ + lwi r6, r1, PTO+PT_R1 /* Arg 1: child SP (use parent's) */ + la r7, r1, PTO /* Arg 2: parent context */ + add r8. r0, r0 /* Arg 3: (unused) */ + add r9, r0, r0; /* Arg 4: (unused) */ + add r10, r0, r0; /* Arg 5: (unused) */ + brid do_fork /* Do real work (tail-call) */ + nop; + +/* This the initial entry point for a new child thread, with an appropriate + stack in place that makes it look the the child is in the middle of an + syscall. This function is actually `returned to' from switch_thread + (copy_thread makes ret_from_fork the return address in each new thread's + saved context). */ +C_ENTRY(ret_from_fork): + bralid r15, schedule_tail; /* ...which is schedule_tail's arg */ + add r3, r5, r0; /* switch_thread returns the prev task */ + /* ( in the delay slot ) */ + add r3, r0, r0; /* Child's fork call should return 0. */ + brid ret_from_trap; /* Do normal trap return */ + nop; + +C_ENTRY(sys_vfork_wrapper): + la r5, r1, PTO + brid sys_vfork /* Do real work (tail-call) */ + nop + +C_ENTRY(sys_clone_wrapper): + bnei r6, 1f; /* See if child SP arg (arg 1) is 0. */ + lwi r6, r1, PTO+PT_R1; /* If so, use paret's stack ptr */ +1: la r7, r1, PTO; /* Arg 2: parent context */ + add r8, r0, r0; /* Arg 3: (unused) */ + add r9, r0, r0; /* Arg 4: (unused) */ + add r10, r0, r0; /* Arg 5: (unused) */ + brid do_fork /* Do real work (tail-call) */ + nop; + +C_ENTRY(sys_execve_wrapper): + la r8, r1, PTO; /* add user context as 4th arg */ + brid sys_execve; /* Do real work (tail-call).*/ + nop; + +C_ENTRY(sys_sigsuspend_wrapper): + swi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + swi r4, r1, PTO+PT_R4; + la r6, r1, PTO; /* add user context as 2nd arg */ + bralid r15, sys_sigsuspend; /* Do real work.*/ + nop; + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + bri ret_from_trap /* fall through will not work here due to align */ + nop; + +C_ENTRY(sys_rt_sigsuspend_wrapper): + swi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + swi r4, r1, PTO+PT_R4; + la r7, r1, PTO; /* add user context as 3rd arg */ + brlid r15, sys_rt_sigsuspend; /* Do real work.*/ + nop; + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + bri ret_from_trap /* fall through will not work here due to align */ + nop; + + +C_ENTRY(sys_sigreturn_wrapper): + swi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + swi r4, r1, PTO+PT_R4; + la r5, r1, PTO; /* add user context as 1st arg */ + brlid r15, sys_sigreturn; /* Do real work.*/ + nop; + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + bri ret_from_trap /* fall through will not work here due to align */ + nop; + +C_ENTRY(sys_rt_sigreturn_wrapper): + swi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + swi r4, r1, PTO+PT_R4; + la r5, r1, PTO; /* add user context as 1st arg */ + brlid r15, sys_rt_sigreturn /* Do real work */ + nop; + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + bri ret_from_trap /* fall through will not work here due to align */ + nop; + +/* + * HW EXCEPTION rutine start + */ + +#define SAVE_STATE \ + swi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* Save r11 */ \ + set_bip; /*equalize initial state for all possible entries*/\ + clear_eip; \ + enable_irq; \ + set_ee; \ + /* See if already in kernel mode.*/ \ + lwi r11, r0, TOPHYS(PER_CPU(KM)); \ + beqi r11, 1f; /* Jump ahead if coming from user */\ + /* Kernel-mode state save. */ \ + /* Reload kernel stack-ptr. */ \ + lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \ + tophys(r1,r11); \ + swi r11, r1, (PT_R1-PT_SIZE); /* Save original SP. */ \ + lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */\ + addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\ + /* store return registers separately because \ + * this macros is use for others exceptions */ \ + swi r3, r1, PTO + PT_R3; \ + swi r4, r1, PTO + PT_R4; \ + SAVE_REGS \ + /* PC, before IRQ/trap - this is one instruction above */ \ + swi r17, r1, PTO+PT_PC; \ + \ + addi r11, r0, 1; /* Was in kernel-mode. */ \ + swi r11, r1, PTO+PT_MODE; \ + brid 2f; \ + nop; /* Fill delay slot */ \ +1: /* User-mode state save. */ \ + lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */\ + lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\ + tophys(r1,r1); \ + lwi r1, r1, TS_THREAD_INFO; /* get the thread info */ \ + addik r1, r1, THREAD_SIZE; /* calculate kernel stack pointer */\ + tophys(r1,r1); \ + \ + addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\ + /* store return registers separately because this macros \ + * is use for others exceptions */ \ + swi r3, r1, PTO + PT_R3; \ + swi r4, r1, PTO + PT_R4; \ + SAVE_REGS \ + /* PC, before IRQ/trap - this is one instruction above FIXME*/ \ + swi r17, r1, PTO+PT_PC; \ + \ + swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ \ + lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \ + swi r11, r1, PTO+PT_R1; /* Store user SP. */ \ + addi r11, r0, 1; \ + swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode.*/\ +2: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\ + /* Save away the syscall number. */ \ + swi r0, r1, PTO+PT_R0; \ + tovirt(r1,r1) + +C_ENTRY(full_exception_trap): + swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */ + /* adjust exception address for privileged instruction + * for finding where is it */ + addik r17, r17, -4 + SAVE_STATE /* Save registers */ + /* FIXME this can be store directly in PT_ESR reg. + * I tested it but there is a fault */ + /* where the trap should return need -8 to adjust for rtsd r15, 8 */ + la r15, r0, ret_from_exc - 8 + la r5, r1, PTO /* parameter struct pt_regs * regs */ + mfs r6, resr + nop + mfs r7, rfsr; /* save FSR */ + nop + la r12, r0, full_exception + set_vms; + rtbd r12, 0; + nop; + +/* + * Unaligned data trap. + * + * Unaligned data trap last on 4k page is handled here. + * + * Trap entered via exception, so EE bit is set, and interrupts + * are masked. This is nice, means we don't have to CLI before state save + * + * The assembler routine is in "arch/microblaze/kernel/hw_exception_handler.S" + */ +C_ENTRY(unaligned_data_trap): + swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */ + SAVE_STATE /* Save registers.*/ + /* where the trap should return need -8 to adjust for rtsd r15, 8 */ + la r15, r0, ret_from_exc-8 + mfs r3, resr /* ESR */ + nop + mfs r4, rear /* EAR */ + nop + la r7, r1, PTO /* parameter struct pt_regs * regs */ + la r12, r0, _unaligned_data_exception + set_vms; + rtbd r12, 0; /* interrupts enabled */ + nop; + +/* + * Page fault traps. + * + * If the real exception handler (from hw_exception_handler.S) didn't find + * the mapping for the process, then we're thrown here to handle such situation. + * + * Trap entered via exceptions, so EE bit is set, and interrupts + * are masked. This is nice, means we don't have to CLI before state save + * + * Build a standard exception frame for TLB Access errors. All TLB exceptions + * will bail out to this point if they can't resolve the lightweight TLB fault. + * + * The C function called is in "arch/microblaze/mm/fault.c", declared as: + * void do_page_fault(struct pt_regs *regs, + * unsigned long address, + * unsigned long error_code) + */ +/* data and intruction trap - which is choose is resolved int fault.c */ +C_ENTRY(page_fault_data_trap): + swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */ + SAVE_STATE /* Save registers.*/ + /* where the trap should return need -8 to adjust for rtsd r15, 8 */ + la r15, r0, ret_from_exc-8 + la r5, r1, PTO /* parameter struct pt_regs * regs */ + mfs r6, rear /* parameter unsigned long address */ + nop + mfs r7, resr /* parameter unsigned long error_code */ + nop + la r12, r0, do_page_fault + set_vms; + rtbd r12, 0; /* interrupts enabled */ + nop; + +C_ENTRY(page_fault_instr_trap): + swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */ + SAVE_STATE /* Save registers.*/ + /* where the trap should return need -8 to adjust for rtsd r15, 8 */ + la r15, r0, ret_from_exc-8 + la r5, r1, PTO /* parameter struct pt_regs * regs */ + mfs r6, rear /* parameter unsigned long address */ + nop + ori r7, r0, 0 /* parameter unsigned long error_code */ + la r12, r0, do_page_fault + set_vms; + rtbd r12, 0; /* interrupts enabled */ + nop; + +/* Entry point used to return from an exception. */ +C_ENTRY(ret_from_exc): + set_bip; /* Ints masked for state restore*/ + lwi r11, r1, PTO+PT_MODE; + bnei r11, 2f; /* See if returning to kernel mode, */ + /* ... if so, skip resched &c. */ + + /* We're returning to user mode, so check for various conditions that + trigger rescheduling. */ + /* Get current task ptr into r11 */ + add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, r11, TI_FLAGS; /* get flags in thread info */ + andi r11, r11, _TIF_NEED_RESCHED; + beqi r11, 5f; + +/* Call the scheduler before returning from a syscall/trap. */ + bralid r15, schedule; /* Call scheduler */ + nop; /* delay slot */ + + /* Maybe handle a signal */ +5: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, r11, TI_FLAGS; /* get flags in thread info */ + andi r11, r11, _TIF_SIGPENDING; + beqi r11, 1f; /* Signals to handle, handle them */ + + /* + * Handle a signal return; Pending signals should be in r18. + * + * Not all registers are saved by the normal trap/interrupt entry + * points (for instance, call-saved registers (because the normal + * C-compiler calling sequence in the kernel makes sure they're + * preserved), and call-clobbered registers in the case of + * traps), but signal handlers may want to examine or change the + * complete register state. Here we save anything not saved by + * the normal entry sequence, so that it may be safely restored + * (in a possibly modified form) after do_signal returns. + * store return registers separately because this macros is use + * for others exceptions */ + swi r3, r1, PTO + PT_R3; + swi r4, r1, PTO + PT_R4; + la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ + add r6, r0, r0; /* Arg 2: sigset_t *oldset */ + addi r7, r0, 0; /* Arg 3: int in_syscall */ + bralid r15, do_signal; /* Handle any signals */ + nop; + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + +/* Finally, return to user state. */ +1: swi r0, r0, PER_CPU(KM); /* Now officially in user state. */ + add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + swi r11, r0, PER_CPU(CURRENT_SAVE); /* save current */ + VM_OFF; + tophys(r1,r1); + + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + RESTORE_REGS; + addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ + + lwi r1, r1, PT_R1 - PT_SIZE; /* Restore user stack pointer. */ + bri 6f; +/* Return to kernel state. */ +2: VM_OFF; + tophys(r1,r1); + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + RESTORE_REGS; + addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ + + tovirt(r1,r1); +6: +EXC_return: /* Make global symbol for debugging */ + rtbd r14, 0; /* Instructions to return from an IRQ */ + nop; + +/* + * HW EXCEPTION rutine end + */ + +/* + * Hardware maskable interrupts. + * + * The stack-pointer (r1) should have already been saved to the memory + * location PER_CPU(ENTRY_SP). + */ +C_ENTRY(_interrupt): +/* MS: we are in physical address */ +/* Save registers, switch to proper stack, convert SP to virtual.*/ + swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) + swi r11, r0, TOPHYS(PER_CPU(R11_SAVE)); + /* MS: See if already in kernel mode. */ + lwi r11, r0, TOPHYS(PER_CPU(KM)); + beqi r11, 1f; /* MS: Jump ahead if coming from user */ + +/* Kernel-mode state save. */ + or r11, r1, r0 + tophys(r1,r11); /* MS: I have in r1 physical address where stack is */ +/* MS: Save original SP - position PT_R1 to next stack frame 4 *1 - 152*/ + swi r11, r1, (PT_R1 - PT_SIZE); +/* MS: restore r11 because of saving in SAVE_REGS */ + lwi r11, r0, TOPHYS(PER_CPU(R11_SAVE)); + /* save registers */ +/* MS: Make room on the stack -> activation record */ + addik r1, r1, -STATE_SAVE_SIZE; +/* MS: store return registers separately because + * this macros is use for others exceptions */ + swi r3, r1, PTO + PT_R3; + swi r4, r1, PTO + PT_R4; + SAVE_REGS + /* MS: store mode */ + addi r11, r0, 1; /* MS: Was in kernel-mode. */ + swi r11, r1, PTO + PT_MODE; /* MS: and save it */ + brid 2f; + nop; /* MS: Fill delay slot */ + +1: +/* User-mode state save. */ +/* MS: restore r11 -> FIXME move before SAVE_REG */ + lwi r11, r0, TOPHYS(PER_CPU(R11_SAVE)); + /* MS: get the saved current */ + lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); + tophys(r1,r1); + lwi r1, r1, TS_THREAD_INFO; + addik r1, r1, THREAD_SIZE; + tophys(r1,r1); + /* save registers */ + addik r1, r1, -STATE_SAVE_SIZE; + swi r3, r1, PTO+PT_R3; + swi r4, r1, PTO+PT_R4; + SAVE_REGS + /* calculate mode */ + swi r0, r1, PTO + PT_MODE; + lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); + swi r11, r1, PTO+PT_R1; + /* setup kernel mode to KM */ + addi r11, r0, 1; + swi r11, r0, TOPHYS(PER_CPU(KM)); + +2: + lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); + swi r0, r1, PTO + PT_R0; + tovirt(r1,r1) + la r5, r1, PTO; + set_vms; + la r11, r0, do_IRQ; + la r15, r0, irq_call; +irq_call:rtbd r11, 0; + nop; + +/* MS: we are in virtual mode */ +ret_from_irq: + lwi r11, r1, PTO + PT_MODE; + bnei r11, 2f; + + add r11, r0, CURRENT_TASK; + lwi r11, r11, TS_THREAD_INFO; + lwi r11, r11, TI_FLAGS; /* MS: get flags from thread info */ + andi r11, r11, _TIF_NEED_RESCHED; + beqi r11, 5f + bralid r15, schedule; + nop; /* delay slot */ + + /* Maybe handle a signal */ +5: add r11, r0, CURRENT_TASK; + lwi r11, r11, TS_THREAD_INFO; /* MS: get thread info */ + lwi r11, r11, TI_FLAGS; /* get flags in thread info */ + andi r11, r11, _TIF_SIGPENDING; + beqid r11, no_intr_resched +/* Handle a signal return; Pending signals should be in r18. */ + addi r7, r0, 0; /* Arg 3: int in_syscall */ + la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ + bralid r15, do_signal; /* Handle any signals */ + add r6, r0, r0; /* Arg 2: sigset_t *oldset */ + +/* Finally, return to user state. */ +no_intr_resched: + /* Disable interrupts, we are now committed to the state restore */ + disable_irq + swi r0, r0, PER_CPU(KM); /* MS: Now officially in user state. */ + add r11, r0, CURRENT_TASK; + swi r11, r0, PER_CPU(CURRENT_SAVE); + VM_OFF; + tophys(r1,r1); + lwi r3, r1, PTO + PT_R3; /* MS: restore saved r3, r4 registers */ + lwi r4, r1, PTO + PT_R4; + RESTORE_REGS + addik r1, r1, STATE_SAVE_SIZE /* MS: Clean up stack space. */ + lwi r1, r1, PT_R1 - PT_SIZE; + bri 6f; +/* MS: Return to kernel state. */ +2: VM_OFF /* MS: turn off MMU */ + tophys(r1,r1) + lwi r3, r1, PTO + PT_R3; /* MS: restore saved r3, r4 registers */ + lwi r4, r1, PTO + PT_R4; + RESTORE_REGS + addik r1, r1, STATE_SAVE_SIZE /* MS: Clean up stack space. */ + tovirt(r1,r1); +6: +IRQ_return: /* MS: Make global symbol for debugging */ + rtid r14, 0 + nop + +/* + * `Debug' trap + * We enter dbtrap in "BIP" (breakpoint) mode. + * So we exit the breakpoint mode with an 'rtbd' and proceed with the + * original dbtrap. + * however, wait to save state first + */ +C_ENTRY(_debug_exception): + /* BIP bit is set on entry, no interrupts can occur */ + swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) + + swi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* Save r11 */ + set_bip; /*equalize initial state for all possible entries*/ + clear_eip; + enable_irq; + lwi r11, r0, TOPHYS(PER_CPU(KM));/* See if already in kernel mode.*/ + beqi r11, 1f; /* Jump ahead if coming from user */ + /* Kernel-mode state save. */ + lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/ + tophys(r1,r11); + swi r11, r1, (PT_R1-PT_SIZE); /* Save original SP. */ + lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */ + + addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */ + swi r3, r1, PTO + PT_R3; + swi r4, r1, PTO + PT_R4; + SAVE_REGS; + + addi r11, r0, 1; /* Was in kernel-mode. */ + swi r11, r1, PTO + PT_MODE; + brid 2f; + nop; /* Fill delay slot */ +1: /* User-mode state save. */ + lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */ + lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */ + tophys(r1,r1); + lwi r1, r1, TS_THREAD_INFO; /* get the thread info */ + addik r1, r1, THREAD_SIZE; /* calculate kernel stack pointer */ + tophys(r1,r1); + + addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */ + swi r3, r1, PTO + PT_R3; + swi r4, r1, PTO + PT_R4; + SAVE_REGS; + + swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ + lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); + swi r11, r1, PTO+PT_R1; /* Store user SP. */ + addi r11, r0, 1; + swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */ +2: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */ + /* Save away the syscall number. */ + swi r0, r1, PTO+PT_R0; + tovirt(r1,r1) + + addi r5, r0, SIGTRAP /* send the trap signal */ + add r6, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + addk r7, r0, r0 /* 3rd param zero */ + + set_vms; + la r11, r0, send_sig; + la r15, r0, dbtrap_call; +dbtrap_call: rtbd r11, 0; + nop; + + set_bip; /* Ints masked for state restore*/ + lwi r11, r1, PTO+PT_MODE; + bnei r11, 2f; + + /* Get current task ptr into r11 */ + add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, r11, TI_FLAGS; /* get flags in thread info */ + andi r11, r11, _TIF_NEED_RESCHED; + beqi r11, 5f; + +/* Call the scheduler before returning from a syscall/trap. */ + + bralid r15, schedule; /* Call scheduler */ + nop; /* delay slot */ + /* XXX Is PT_DTRACE handling needed here? */ + /* XXX m68knommu also checks TASK_STATE & TASK_COUNTER here. */ + + /* Maybe handle a signal */ +5: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, r11, TI_FLAGS; /* get flags in thread info */ + andi r11, r11, _TIF_SIGPENDING; + beqi r11, 1f; /* Signals to handle, handle them */ + +/* Handle a signal return; Pending signals should be in r18. */ + /* Not all registers are saved by the normal trap/interrupt entry + points (for instance, call-saved registers (because the normal + C-compiler calling sequence in the kernel makes sure they're + preserved), and call-clobbered registers in the case of + traps), but signal handlers may want to examine or change the + complete register state. Here we save anything not saved by + the normal entry sequence, so that it may be safely restored + (in a possibly modified form) after do_signal returns. */ + + la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ + add r6, r0, r0; /* Arg 2: sigset_t *oldset */ + addi r7, r0, 0; /* Arg 3: int in_syscall */ + bralid r15, do_signal; /* Handle any signals */ + nop; + + +/* Finally, return to user state. */ +1: swi r0, r0, PER_CPU(KM); /* Now officially in user state. */ + add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ + swi r11, r0, PER_CPU(CURRENT_SAVE); /* save current */ + VM_OFF; + tophys(r1,r1); + + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + RESTORE_REGS + addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ + + + lwi r1, r1, PT_R1 - PT_SIZE; + /* Restore user stack pointer. */ + bri 6f; + +/* Return to kernel state. */ +2: VM_OFF; + tophys(r1,r1); + lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */ + lwi r4, r1, PTO+PT_R4; + RESTORE_REGS + addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ + + tovirt(r1,r1); +6: +DBTRAP_return: /* Make global symbol for debugging */ + rtbd r14, 0; /* Instructions to return from an IRQ */ + nop; + + + +ENTRY(_switch_to) + /* prepare return value */ + addk r3, r0, r31 + + /* save registers in cpu_context */ + /* use r11 and r12, volatile registers, as temp register */ + /* give start of cpu_context for previous process */ + addik r11, r5, TI_CPU_CONTEXT + swi r1, r11, CC_R1 + swi r2, r11, CC_R2 + /* skip volatile registers. + * they are saved on stack when we jumped to _switch_to() */ + /* dedicated registers */ + swi r13, r11, CC_R13 + swi r14, r11, CC_R14 + swi r15, r11, CC_R15 + swi r16, r11, CC_R16 + swi r17, r11, CC_R17 + swi r18, r11, CC_R18 + /* save non-volatile registers */ + swi r19, r11, CC_R19 + swi r20, r11, CC_R20 + swi r21, r11, CC_R21 + swi r22, r11, CC_R22 + swi r23, r11, CC_R23 + swi r24, r11, CC_R24 + swi r25, r11, CC_R25 + swi r26, r11, CC_R26 + swi r27, r11, CC_R27 + swi r28, r11, CC_R28 + swi r29, r11, CC_R29 + swi r30, r11, CC_R30 + /* special purpose registers */ + mfs r12, rmsr + nop + swi r12, r11, CC_MSR + mfs r12, rear + nop + swi r12, r11, CC_EAR + mfs r12, resr + nop + swi r12, r11, CC_ESR + mfs r12, rfsr + nop + swi r12, r11, CC_FSR + + /* update r31, the current */ + lwi r31, r6, TI_TASK/* give me pointer to task which will be next */ + /* stored it to current_save too */ + swi r31, r0, PER_CPU(CURRENT_SAVE) + + /* get new process' cpu context and restore */ + /* give me start where start context of next task */ + addik r11, r6, TI_CPU_CONTEXT + + /* non-volatile registers */ + lwi r30, r11, CC_R30 + lwi r29, r11, CC_R29 + lwi r28, r11, CC_R28 + lwi r27, r11, CC_R27 + lwi r26, r11, CC_R26 + lwi r25, r11, CC_R25 + lwi r24, r11, CC_R24 + lwi r23, r11, CC_R23 + lwi r22, r11, CC_R22 + lwi r21, r11, CC_R21 + lwi r20, r11, CC_R20 + lwi r19, r11, CC_R19 + /* dedicated registers */ + lwi r18, r11, CC_R18 + lwi r17, r11, CC_R17 + lwi r16, r11, CC_R16 + lwi r15, r11, CC_R15 + lwi r14, r11, CC_R14 + lwi r13, r11, CC_R13 + /* skip volatile registers */ + lwi r2, r11, CC_R2 + lwi r1, r11, CC_R1 + + /* special purpose registers */ + lwi r12, r11, CC_FSR + mts rfsr, r12 + nop + lwi r12, r11, CC_MSR + mts rmsr, r12 + nop + + rtsd r15, 8 + nop + +ENTRY(_reset) + brai 0x70; /* Jump back to FS-boot */ + +ENTRY(_break) + mfs r5, rmsr + nop + swi r5, r0, 0x250 + TOPHYS(r0_ram) + mfs r5, resr + nop + swi r5, r0, 0x254 + TOPHYS(r0_ram) + bri 0 + + /* These are compiled and loaded into high memory, then + * copied into place in mach_early_setup */ + .section .init.ivt, "ax" + .org 0x0 + /* this is very important - here is the reset vector */ + /* in current MMU branch you don't care what is here - it is + * used from bootloader site - but this is correct for FS-BOOT */ + brai 0x70 + nop + brai TOPHYS(_user_exception); /* syscall handler */ + brai TOPHYS(_interrupt); /* Interrupt handler */ + brai TOPHYS(_break); /* nmi trap handler */ + brai TOPHYS(_hw_exception_handler); /* HW exception handler */ + + .org 0x60 + brai TOPHYS(_debug_exception); /* debug trap handler*/ + +.section .rodata,"a" +#include "syscall_table.S" + +syscall_table_size=(.-sys_call_table) + diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c index 4a8a4064c7ee..0cb64a31e89a 100644 --- a/arch/microblaze/kernel/exceptions.c +++ b/arch/microblaze/kernel/exceptions.c @@ -21,9 +21,9 @@ #include <asm/exceptions.h> #include <asm/entry.h> /* For KM CPU var */ -#include <asm/uaccess.h> -#include <asm/errno.h> -#include <asm/ptrace.h> +#include <linux/uaccess.h> +#include <linux/errno.h> +#include <linux/ptrace.h> #include <asm/current.h> #define MICROBLAZE_ILL_OPCODE_EXCEPTION 0x02 @@ -31,7 +31,7 @@ #define MICROBLAZE_DBUS_EXCEPTION 0x04 #define MICROBLAZE_DIV_ZERO_EXCEPTION 0x05 #define MICROBLAZE_FPU_EXCEPTION 0x06 -#define MICROBLAZE_PRIVILEG_EXCEPTION 0x07 +#define MICROBLAZE_PRIVILEGED_EXCEPTION 0x07 static DEFINE_SPINLOCK(die_lock); @@ -66,6 +66,11 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr) asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, int fsr, int addr) { +#ifdef CONFIG_MMU + int code; + addr = regs->pc; +#endif + #if 0 printk(KERN_WARNING "Exception %02x in %s mode, FSR=%08x PC=%08x ESR=%08x\n", type, user_mode(regs) ? "user" : "kernel", fsr, @@ -74,7 +79,13 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, switch (type & 0x1F) { case MICROBLAZE_ILL_OPCODE_EXCEPTION: - _exception(SIGILL, regs, ILL_ILLOPC, addr); + if (user_mode(regs)) { + printk(KERN_WARNING "Illegal opcode exception in user mode.\n"); + _exception(SIGILL, regs, ILL_ILLOPC, addr); + return; + } + printk(KERN_WARNING "Illegal opcode exception in kernel mode.\n"); + die("opcode exception", regs, SIGBUS); break; case MICROBLAZE_IBUS_EXCEPTION: if (user_mode(regs)) { @@ -95,11 +106,16 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, die("bus exception", regs, SIGBUS); break; case MICROBLAZE_DIV_ZERO_EXCEPTION: - printk(KERN_WARNING "Divide by zero exception\n"); - _exception(SIGILL, regs, ILL_ILLOPC, addr); + if (user_mode(regs)) { + printk(KERN_WARNING "Divide by zero exception in user mode\n"); + _exception(SIGILL, regs, ILL_ILLOPC, addr); + return; + } + printk(KERN_WARNING "Divide by zero exception in kernel mode.\n"); + die("Divide by exception", regs, SIGBUS); break; - case MICROBLAZE_FPU_EXCEPTION: + printk(KERN_WARNING "FPU exception\n"); /* IEEE FP exception */ /* I removed fsr variable and use code var for storing fsr */ if (fsr & FSR_IO) @@ -115,7 +131,20 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, _exception(SIGFPE, regs, fsr, addr); break; +#ifdef CONFIG_MMU + case MICROBLAZE_PRIVILEGED_EXCEPTION: + printk(KERN_WARNING "Privileged exception\n"); + /* "brk r0,r0" - used as debug breakpoint */ + if (get_user(code, (unsigned long *)regs->pc) == 0 + && code == 0x980c0000) { + _exception(SIGTRAP, regs, TRAP_BRKPT, addr); + } else { + _exception(SIGILL, regs, ILL_PRVOPC, addr); + } + break; +#endif default: + /* FIXME what to do in unexpected exception */ printk(KERN_WARNING "Unexpected exception %02x " "PC=%08x in %s mode\n", type, (unsigned int) addr, kernel_mode(regs) ? "kernel" : "user"); diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S index 319dc35fc922..e568d6ec621b 100644 --- a/arch/microblaze/kernel/head.S +++ b/arch/microblaze/kernel/head.S @@ -3,6 +3,26 @@ * Copyright (C) 2007-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * + * MMU code derived from arch/ppc/kernel/head_4xx.S: + * Copyright (c) 1995-1996 Gary Thomas <gdt@linuxppc.org> + * Initial PowerPC version. + * Copyright (c) 1996 Cort Dougan <cort@cs.nmt.edu> + * Rewritten for PReP + * Copyright (c) 1996 Paul Mackerras <paulus@cs.anu.edu.au> + * Low-level exception handers, MMU support, and rewrite. + * Copyright (c) 1997 Dan Malek <dmalek@jlc.net> + * PowerPC 8xx modifications. + * Copyright (c) 1998-1999 TiVo, Inc. + * PowerPC 403GCX modifications. + * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> + * PowerPC 403GCX/405GP modifications. + * Copyright 2000 MontaVista Software Inc. + * PPC405 modifications + * PowerPC 403GCX/405GP modifications. + * Author: MontaVista Software, Inc. + * frank_rowand@mvista.com or source@mvista.com + * debbie_chu@mvista.com + * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. @@ -12,6 +32,22 @@ #include <asm/thread_info.h> #include <asm/page.h> +#ifdef CONFIG_MMU +#include <asm/setup.h> /* COMMAND_LINE_SIZE */ +#include <asm/mmu.h> +#include <asm/processor.h> + +.data +.global empty_zero_page +.align 12 +empty_zero_page: + .space 4096 +.global swapper_pg_dir +swapper_pg_dir: + .space 4096 + +#endif /* CONFIG_MMU */ + .text ENTRY(_start) mfs r1, rmsr @@ -32,6 +68,123 @@ _copy_fdt: addik r3, r3, -4 /* descrement loop */ no_fdt_arg: +#ifdef CONFIG_MMU + +#ifndef CONFIG_CMDLINE_BOOL +/* + * handling command line + * copy command line to __init_end. There is space for storing command line. + */ + or r6, r0, r0 /* incremment */ + ori r4, r0, __init_end /* load address of command line */ + tophys(r4,r4) /* convert to phys address */ + ori r3, r0, COMMAND_LINE_SIZE - 1 /* number of loops */ +_copy_command_line: + lbu r7, r5, r6 /* r7=r5+r6 - r5 contain pointer to command line */ + sb r7, r4, r6 /* addr[r4+r6]= r7*/ + addik r6, r6, 1 /* increment counting */ + bgtid r3, _copy_command_line /* loop for all entries */ + addik r3, r3, -1 /* descrement loop */ + addik r5, r4, 0 /* add new space for command line */ + tovirt(r5,r5) +#endif /* CONFIG_CMDLINE_BOOL */ + +#ifdef NOT_COMPILE +/* save bram context */ + or r6, r0, r0 /* incremment */ + ori r4, r0, TOPHYS(_bram_load_start) /* save bram context */ + ori r3, r0, (LMB_SIZE - 4) +_copy_bram: + lw r7, r0, r6 /* r7 = r0 + r6 */ + sw r7, r4, r6 /* addr[r4 + r6] = r7*/ + addik r6, r6, 4 /* increment counting */ + bgtid r3, _copy_bram /* loop for all entries */ + addik r3, r3, -4 /* descrement loop */ +#endif + /* We have to turn on the MMU right away. */ + + /* + * Set up the initial MMU state so we can do the first level of + * kernel initialization. This maps the first 16 MBytes of memory 1:1 + * virtual to physical. + */ + nop + addik r3, r0, 63 /* Invalidate all TLB entries */ +_invalidate: + mts rtlbx, r3 + mts rtlbhi, r0 /* flush: ensure V is clear */ + bgtid r3, _invalidate /* loop for all entries */ + addik r3, r3, -1 + /* sync */ + + /* + * We should still be executing code at physical address area + * RAM_BASEADDR at this point. However, kernel code is at + * a virtual address. So, set up a TLB mapping to cover this once + * translation is enabled. + */ + + addik r3,r0, CONFIG_KERNEL_START /* Load the kernel virtual address */ + tophys(r4,r3) /* Load the kernel physical address */ + + mts rpid,r0 /* Load the kernel PID */ + nop + bri 4 + + /* + * Configure and load two entries into TLB slots 0 and 1. + * In case we are pinning TLBs, these are reserved in by the + * other TLB functions. If not reserving, then it doesn't + * matter where they are loaded. + */ + andi r4,r4,0xfffffc00 /* Mask off the real page number */ + ori r4,r4,(TLB_WR | TLB_EX) /* Set the write and execute bits */ + + andi r3,r3,0xfffffc00 /* Mask off the effective page number */ + ori r3,r3,(TLB_VALID | TLB_PAGESZ(PAGESZ_16M)) + + mts rtlbx,r0 /* TLB slow 0 */ + + mts rtlblo,r4 /* Load the data portion of the entry */ + mts rtlbhi,r3 /* Load the tag portion of the entry */ + + addik r4, r4, 0x01000000 /* Map next 16 M entries */ + addik r3, r3, 0x01000000 + + ori r6,r0,1 /* TLB slot 1 */ + mts rtlbx,r6 + + mts rtlblo,r4 /* Load the data portion of the entry */ + mts rtlbhi,r3 /* Load the tag portion of the entry */ + + /* + * Load a TLB entry for LMB, since we need access to + * the exception vectors, using a 4k real==virtual mapping. + */ + ori r6,r0,3 /* TLB slot 3 */ + mts rtlbx,r6 + + ori r4,r0,(TLB_WR | TLB_EX) + ori r3,r0,(TLB_VALID | TLB_PAGESZ(PAGESZ_4K)) + + mts rtlblo,r4 /* Load the data portion of the entry */ + mts rtlbhi,r3 /* Load the tag portion of the entry */ + + /* + * We now have the lower 16 Meg of RAM mapped into TLB entries, and the + * caches ready to work. + */ +turn_on_mmu: + ori r15,r0,start_here + ori r4,r0,MSR_KERNEL_VMS + mts rmsr,r4 + nop + rted r15,0 /* enables MMU */ + nop + +start_here: +#endif /* CONFIG_MMU */ + /* Initialize small data anchors */ la r13, r0, _KERNEL_SDA_BASE_ la r2, r0, _KERNEL_SDA2_BASE_ @@ -51,6 +204,43 @@ no_fdt_arg: brald r15, r8 nop +#ifndef CONFIG_MMU la r15, r0, machine_halt braid start_kernel nop +#else + /* + * Initialize the MMU. + */ + bralid r15, mmu_init + nop + + /* Go back to running unmapped so we can load up new values + * and change to using our exception vectors. + * On the MicroBlaze, all we invalidate the used TLB entries to clear + * the old 16M byte TLB mappings. + */ + ori r15,r0,TOPHYS(kernel_load_context) + ori r4,r0,MSR_KERNEL + mts rmsr,r4 + nop + bri 4 + rted r15,0 + nop + + /* Load up the kernel context */ +kernel_load_context: + # Keep entry 0 and 1 valid. Entry 3 mapped to LMB can go away. + ori r5,r0,3 + mts rtlbx,r5 + nop + mts rtlbhi,r0 + nop + addi r15, r0, machine_halt + ori r17, r0, start_kernel + ori r4, r0, MSR_KERNEL_VMS + mts rmsr, r4 + nop + rted r17, 0 /* enable MMU and jump to start_kernel */ + nop +#endif /* CONFIG_MMU */ diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S index cf9486d99838..9d591cd74fc2 100644 --- a/arch/microblaze/kernel/hw_exception_handler.S +++ b/arch/microblaze/kernel/hw_exception_handler.S @@ -53,6 +53,12 @@ * - Illegal instruction opcode * - Divide-by-zero * + * - Privileged instruction exception (MMU) + * - Data storage exception (MMU) + * - Instruction storage exception (MMU) + * - Data TLB miss exception (MMU) + * - Instruction TLB miss exception (MMU) + * * Note we disable interrupts during exception handling, otherwise we will * possibly get multiple re-entrancy if interrupt handles themselves cause * exceptions. JW @@ -71,9 +77,24 @@ #include <asm/asm-offsets.h> /* Helpful Macros */ +#ifndef CONFIG_MMU #define EX_HANDLER_STACK_SIZ (4*19) +#endif #define NUM_TO_REG(num) r ## num +#ifdef CONFIG_MMU +/* FIXME you can't change first load of MSR because there is + * hardcoded jump bri 4 */ + #define RESTORE_STATE \ + lwi r3, r1, PT_R3; \ + lwi r4, r1, PT_R4; \ + lwi r5, r1, PT_R5; \ + lwi r6, r1, PT_R6; \ + lwi r11, r1, PT_R11; \ + lwi r31, r1, PT_R31; \ + lwi r1, r0, TOPHYS(r0_ram + 0); +#endif /* CONFIG_MMU */ + #define LWREG_NOP \ bri ex_handler_unhandled; \ nop; @@ -106,6 +127,54 @@ or r3, r0, NUM_TO_REG (regnum); \ bri ex_sw_tail; +#ifdef CONFIG_MMU + #define R3_TO_LWREG_VM_V(regnum) \ + brid ex_lw_end_vm; \ + swi r3, r7, 4 * regnum; + + #define R3_TO_LWREG_VM(regnum) \ + brid ex_lw_end_vm; \ + or NUM_TO_REG (regnum), r0, r3; + + #define SWREG_TO_R3_VM_V(regnum) \ + brid ex_sw_tail_vm; \ + lwi r3, r7, 4 * regnum; + + #define SWREG_TO_R3_VM(regnum) \ + brid ex_sw_tail_vm; \ + or r3, r0, NUM_TO_REG (regnum); + + /* Shift right instruction depending on available configuration */ + #if CONFIG_XILINX_MICROBLAZE0_USE_BARREL > 0 + #define BSRLI(rD, rA, imm) \ + bsrli rD, rA, imm + #elif CONFIG_XILINX_MICROBLAZE0_USE_DIV > 0 + #define BSRLI(rD, rA, imm) \ + ori rD, r0, (1 << imm); \ + idivu rD, rD, rA + #else + #define BSRLI(rD, rA, imm) BSRLI ## imm (rD, rA) + /* Only the used shift constants defined here - add more if needed */ + #define BSRLI2(rD, rA) \ + srl rD, rA; /* << 1 */ \ + srl rD, rD; /* << 2 */ + #define BSRLI10(rD, rA) \ + srl rD, rA; /* << 1 */ \ + srl rD, rD; /* << 2 */ \ + srl rD, rD; /* << 3 */ \ + srl rD, rD; /* << 4 */ \ + srl rD, rD; /* << 5 */ \ + srl rD, rD; /* << 6 */ \ + srl rD, rD; /* << 7 */ \ + srl rD, rD; /* << 8 */ \ + srl rD, rD; /* << 9 */ \ + srl rD, rD /* << 10 */ + #define BSRLI20(rD, rA) \ + BSRLI10(rD, rA); \ + BSRLI10(rD, rD) + #endif +#endif /* CONFIG_MMU */ + .extern other_exception_handler /* Defined in exception.c */ /* @@ -163,34 +232,119 @@ /* wrappers to restore state before coming to entry.S */ +#ifdef CONFIG_MMU +.section .rodata +.align 4 +_MB_HW_ExceptionVectorTable: +/* 0 - Undefined */ + .long TOPHYS(ex_handler_unhandled) +/* 1 - Unaligned data access exception */ + .long TOPHYS(handle_unaligned_ex) +/* 2 - Illegal op-code exception */ + .long TOPHYS(full_exception_trapw) +/* 3 - Instruction bus error exception */ + .long TOPHYS(full_exception_trapw) +/* 4 - Data bus error exception */ + .long TOPHYS(full_exception_trapw) +/* 5 - Divide by zero exception */ + .long TOPHYS(full_exception_trapw) +/* 6 - Floating point unit exception */ + .long TOPHYS(full_exception_trapw) +/* 7 - Privileged instruction exception */ + .long TOPHYS(full_exception_trapw) +/* 8 - 15 - Undefined */ + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) +/* 16 - Data storage exception */ + .long TOPHYS(handle_data_storage_exception) +/* 17 - Instruction storage exception */ + .long TOPHYS(handle_instruction_storage_exception) +/* 18 - Data TLB miss exception */ + .long TOPHYS(handle_data_tlb_miss_exception) +/* 19 - Instruction TLB miss exception */ + .long TOPHYS(handle_instruction_tlb_miss_exception) +/* 20 - 31 - Undefined */ + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) + .long TOPHYS(ex_handler_unhandled) +#endif + .global _hw_exception_handler .section .text .align 4 .ent _hw_exception_handler _hw_exception_handler: +#ifndef CONFIG_MMU addik r1, r1, -(EX_HANDLER_STACK_SIZ); /* Create stack frame */ +#else + swi r1, r0, TOPHYS(r0_ram + 0); /* GET_SP */ + /* Save date to kernel memory. Here is the problem + * when you came from user space */ + ori r1, r0, TOPHYS(r0_ram + 28); +#endif swi r3, r1, PT_R3 swi r4, r1, PT_R4 swi r5, r1, PT_R5 swi r6, r1, PT_R6 - mfs r5, rmsr; - nop - swi r5, r1, 0; - mfs r4, rbtr /* Save BTR before jumping to handler */ - nop +#ifdef CONFIG_MMU + swi r11, r1, PT_R11 + swi r31, r1, PT_R31 + lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)) /* get saved current */ +#endif + mfs r3, resr nop + mfs r4, rear; + nop +#ifndef CONFIG_MMU andi r5, r3, 0x1000; /* Check ESR[DS] */ beqi r5, not_in_delay_slot; /* Branch if ESR[DS] not set */ mfs r17, rbtr; /* ESR[DS] set - return address in BTR */ nop not_in_delay_slot: swi r17, r1, PT_R17 +#endif andi r5, r3, 0x1F; /* Extract ESR[EXC] */ +#ifdef CONFIG_MMU + /* Calculate exception vector offset = r5 << 2 */ + addk r6, r5, r5; /* << 1 */ + addk r6, r6, r6; /* << 2 */ + +/* counting which exception happen */ + lwi r5, r0, 0x200 + TOPHYS(r0_ram) + addi r5, r5, 1 + swi r5, r0, 0x200 + TOPHYS(r0_ram) + lwi r5, r6, 0x200 + TOPHYS(r0_ram) + addi r5, r5, 1 + swi r5, r6, 0x200 + TOPHYS(r0_ram) +/* end */ + /* Load the HW Exception vector */ + lwi r6, r6, TOPHYS(_MB_HW_ExceptionVectorTable) + bra r6 + +full_exception_trapw: + RESTORE_STATE + bri full_exception_trap +#else /* Exceptions enabled here. This will allow nested exceptions */ mfs r6, rmsr; nop @@ -254,6 +408,7 @@ handle_other_ex: /* Handle Other exceptions here */ lwi r18, r1, PT_R18 bri ex_handler_done; /* Complete exception handling */ +#endif /* 0x01 - Unaligned data access exception * This occurs when a word access is not aligned on a word boundary, @@ -265,11 +420,28 @@ handle_other_ex: /* Handle Other exceptions here */ handle_unaligned_ex: /* Working registers already saved: R3, R4, R5, R6 * R3 = ESR - * R4 = BTR + * R4 = EAR */ - mfs r4, rear; +#ifdef CONFIG_MMU + andi r6, r3, 0x1000 /* Check ESR[DS] */ + beqi r6, _no_delayslot /* Branch if ESR[DS] not set */ + mfs r17, rbtr; /* ESR[DS] set - return address in BTR */ nop +_no_delayslot: +#endif + +#ifdef CONFIG_MMU + /* Check if unaligned address is last on a 4k page */ + andi r5, r4, 0xffc + xori r5, r5, 0xffc + bnei r5, _unaligned_ex2 + _unaligned_ex1: + RESTORE_STATE; +/* Another page must be accessed or physical address not in page table */ + bri unaligned_data_trap + _unaligned_ex2: +#endif andi r6, r3, 0x3E0; /* Mask and extract the register operand */ srl r6, r6; /* r6 >> 5 */ srl r6, r6; @@ -278,6 +450,45 @@ handle_unaligned_ex: srl r6, r6; /* Store the register operand in a temporary location */ sbi r6, r0, TOPHYS(ex_reg_op); +#ifdef CONFIG_MMU + /* Get physical address */ + /* If we are faulting a kernel address, we have to use the + * kernel page tables. + */ + ori r5, r0, CONFIG_KERNEL_START + cmpu r5, r4, r5 + bgti r5, _unaligned_ex3 + ori r5, r0, swapper_pg_dir + bri _unaligned_ex4 + + /* Get the PGD for the current thread. */ +_unaligned_ex3: /* user thread */ + addi r5 ,CURRENT_TASK, TOPHYS(0); /* get current task address */ + lwi r5, r5, TASK_THREAD + PGDIR +_unaligned_ex4: + tophys(r5,r5) + BSRLI(r6,r4,20) /* Create L1 (pgdir/pmd) address */ + andi r6, r6, 0xffc +/* Assume pgdir aligned on 4K boundary, no need for "andi r5,r5,0xfffff003" */ + or r5, r5, r6 + lwi r6, r5, 0 /* Get L1 entry */ + andi r5, r6, 0xfffff000 /* Extract L2 (pte) base address. */ + beqi r5, _unaligned_ex1 /* Bail if no table */ + + tophys(r5,r5) + BSRLI(r6,r4,10) /* Compute PTE address */ + andi r6, r6, 0xffc + andi r5, r5, 0xfffff003 + or r5, r5, r6 + lwi r5, r5, 0 /* Get Linux PTE */ + + andi r6, r5, _PAGE_PRESENT + beqi r6, _unaligned_ex1 /* Bail if no page */ + + andi r5, r5, 0xfffff000 /* Extract RPN */ + andi r4, r4, 0x00000fff /* Extract offset */ + or r4, r4, r5 /* Create physical address */ +#endif /* CONFIG_MMU */ andi r6, r3, 0x400; /* Extract ESR[S] */ bnei r6, ex_sw; @@ -355,6 +566,7 @@ ex_shw: ex_sw_end: /* Exception handling of store word, ends. */ ex_handler_done: +#ifndef CONFIG_MMU lwi r5, r1, 0 /* RMSR */ mts rmsr, r5 nop @@ -366,13 +578,455 @@ ex_handler_done: rted r17, 0 addik r1, r1, (EX_HANDLER_STACK_SIZ); /* Restore stack frame */ +#else + RESTORE_STATE; + rted r17, 0 + nop +#endif + +#ifdef CONFIG_MMU + /* Exception vector entry code. This code runs with address translation + * turned off (i.e. using physical addresses). */ + + /* Exception vectors. */ + + /* 0x10 - Data Storage Exception + * This happens for just a few reasons. U0 set (but we don't do that), + * or zone protection fault (user violation, write to protected page). + * If this is just an update of modified status, we do that quickly + * and exit. Otherwise, we call heavyweight functions to do the work. + */ + handle_data_storage_exception: + /* Working registers already saved: R3, R4, R5, R6 + * R3 = ESR + */ + mfs r11, rpid + nop + bri 4 + mfs r3, rear /* Get faulting address */ + nop + /* If we are faulting a kernel address, we have to use the + * kernel page tables. + */ + ori r4, r0, CONFIG_KERNEL_START + cmpu r4, r3, r4 + bgti r4, ex3 + /* First, check if it was a zone fault (which means a user + * tried to access a kernel or read-protected page - always + * a SEGV). All other faults here must be stores, so no + * need to check ESR_S as well. */ + mfs r4, resr + nop + andi r4, r4, 0x800 /* ESR_Z - zone protection */ + bnei r4, ex2 + + ori r4, r0, swapper_pg_dir + mts rpid, r0 /* TLB will have 0 TID */ + nop + bri ex4 + + /* Get the PGD for the current thread. */ + ex3: + /* First, check if it was a zone fault (which means a user + * tried to access a kernel or read-protected page - always + * a SEGV). All other faults here must be stores, so no + * need to check ESR_S as well. */ + mfs r4, resr + nop + andi r4, r4, 0x800 /* ESR_Z */ + bnei r4, ex2 + /* get current task address */ + addi r4 ,CURRENT_TASK, TOPHYS(0); + lwi r4, r4, TASK_THREAD+PGDIR + ex4: + tophys(r4,r4) + BSRLI(r5,r3,20) /* Create L1 (pgdir/pmd) address */ + andi r5, r5, 0xffc +/* Assume pgdir aligned on 4K boundary, no need for "andi r4,r4,0xfffff003" */ + or r4, r4, r5 + lwi r4, r4, 0 /* Get L1 entry */ + andi r5, r4, 0xfffff000 /* Extract L2 (pte) base address */ + beqi r5, ex2 /* Bail if no table */ + + tophys(r5,r5) + BSRLI(r6,r3,10) /* Compute PTE address */ + andi r6, r6, 0xffc + andi r5, r5, 0xfffff003 + or r5, r5, r6 + lwi r4, r5, 0 /* Get Linux PTE */ + + andi r6, r4, _PAGE_RW /* Is it writeable? */ + beqi r6, ex2 /* Bail if not */ + + /* Update 'changed' */ + ori r4, r4, _PAGE_DIRTY|_PAGE_ACCESSED|_PAGE_HWWRITE + swi r4, r5, 0 /* Update Linux page table */ + + /* Most of the Linux PTE is ready to load into the TLB LO. + * We set ZSEL, where only the LS-bit determines user access. + * We set execute, because we don't have the granularity to + * properly set this at the page level (Linux problem). + * If shared is set, we cause a zero PID->TID load. + * Many of these bits are software only. Bits we don't set + * here we (properly should) assume have the appropriate value. + */ + andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */ + ori r4, r4, _PAGE_HWEXEC /* make it executable */ + + /* find the TLB index that caused the fault. It has to be here*/ + mts rtlbsx, r3 + nop + mfs r5, rtlbx /* DEBUG: TBD */ + nop + mts rtlblo, r4 /* Load TLB LO */ + nop + /* Will sync shadow TLBs */ + + /* Done...restore registers and get out of here. */ + mts rpid, r11 + nop + bri 4 + + RESTORE_STATE; + rted r17, 0 + nop + ex2: + /* The bailout. Restore registers to pre-exception conditions + * and call the heavyweights to help us out. */ + mts rpid, r11 + nop + bri 4 + RESTORE_STATE; + bri page_fault_data_trap + + + /* 0x11 - Instruction Storage Exception + * This is caused by a fetch from non-execute or guarded pages. */ + handle_instruction_storage_exception: + /* Working registers already saved: R3, R4, R5, R6 + * R3 = ESR + */ + + mfs r3, rear /* Get faulting address */ + nop + RESTORE_STATE; + bri page_fault_instr_trap + + /* 0x12 - Data TLB Miss Exception + * As the name implies, translation is not in the MMU, so search the + * page tables and fix it. The only purpose of this function is to + * load TLB entries from the page table if they exist. + */ + handle_data_tlb_miss_exception: + /* Working registers already saved: R3, R4, R5, R6 + * R3 = ESR + */ + mfs r11, rpid + nop + bri 4 + mfs r3, rear /* Get faulting address */ + nop + + /* If we are faulting a kernel address, we have to use the + * kernel page tables. */ + ori r4, r0, CONFIG_KERNEL_START + cmpu r4, r3, r4 + bgti r4, ex5 + ori r4, r0, swapper_pg_dir + mts rpid, r0 /* TLB will have 0 TID */ + nop + bri ex6 + /* Get the PGD for the current thread. */ + ex5: + /* get current task address */ + addi r4 ,CURRENT_TASK, TOPHYS(0); + lwi r4, r4, TASK_THREAD+PGDIR + ex6: + tophys(r4,r4) + BSRLI(r5,r3,20) /* Create L1 (pgdir/pmd) address */ + andi r5, r5, 0xffc +/* Assume pgdir aligned on 4K boundary, no need for "andi r4,r4,0xfffff003" */ + or r4, r4, r5 + lwi r4, r4, 0 /* Get L1 entry */ + andi r5, r4, 0xfffff000 /* Extract L2 (pte) base address */ + beqi r5, ex7 /* Bail if no table */ + + tophys(r5,r5) + BSRLI(r6,r3,10) /* Compute PTE address */ + andi r6, r6, 0xffc + andi r5, r5, 0xfffff003 + or r5, r5, r6 + lwi r4, r5, 0 /* Get Linux PTE */ + + andi r6, r4, _PAGE_PRESENT + beqi r6, ex7 + + ori r4, r4, _PAGE_ACCESSED + swi r4, r5, 0 + + /* Most of the Linux PTE is ready to load into the TLB LO. + * We set ZSEL, where only the LS-bit determines user access. + * We set execute, because we don't have the granularity to + * properly set this at the page level (Linux problem). + * If shared is set, we cause a zero PID->TID load. + * Many of these bits are software only. Bits we don't set + * here we (properly should) assume have the appropriate value. + */ + andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */ + + bri finish_tlb_load + ex7: + /* The bailout. Restore registers to pre-exception conditions + * and call the heavyweights to help us out. + */ + mts rpid, r11 + nop + bri 4 + RESTORE_STATE; + bri page_fault_data_trap + + /* 0x13 - Instruction TLB Miss Exception + * Nearly the same as above, except we get our information from + * different registers and bailout to a different point. + */ + handle_instruction_tlb_miss_exception: + /* Working registers already saved: R3, R4, R5, R6 + * R3 = ESR + */ + mfs r11, rpid + nop + bri 4 + mfs r3, rear /* Get faulting address */ + nop + + /* If we are faulting a kernel address, we have to use the + * kernel page tables. + */ + ori r4, r0, CONFIG_KERNEL_START + cmpu r4, r3, r4 + bgti r4, ex8 + ori r4, r0, swapper_pg_dir + mts rpid, r0 /* TLB will have 0 TID */ + nop + bri ex9 + + /* Get the PGD for the current thread. */ + ex8: + /* get current task address */ + addi r4 ,CURRENT_TASK, TOPHYS(0); + lwi r4, r4, TASK_THREAD+PGDIR + ex9: + tophys(r4,r4) + BSRLI(r5,r3,20) /* Create L1 (pgdir/pmd) address */ + andi r5, r5, 0xffc +/* Assume pgdir aligned on 4K boundary, no need for "andi r4,r4,0xfffff003" */ + or r4, r4, r5 + lwi r4, r4, 0 /* Get L1 entry */ + andi r5, r4, 0xfffff000 /* Extract L2 (pte) base address */ + beqi r5, ex10 /* Bail if no table */ + + tophys(r5,r5) + BSRLI(r6,r3,10) /* Compute PTE address */ + andi r6, r6, 0xffc + andi r5, r5, 0xfffff003 + or r5, r5, r6 + lwi r4, r5, 0 /* Get Linux PTE */ + + andi r6, r4, _PAGE_PRESENT + beqi r6, ex7 + + ori r4, r4, _PAGE_ACCESSED + swi r4, r5, 0 + + /* Most of the Linux PTE is ready to load into the TLB LO. + * We set ZSEL, where only the LS-bit determines user access. + * We set execute, because we don't have the granularity to + * properly set this at the page level (Linux problem). + * If shared is set, we cause a zero PID->TID load. + * Many of these bits are software only. Bits we don't set + * here we (properly should) assume have the appropriate value. + */ + andni r4, r4, 0x0ce2 /* Make sure 20, 21 are zero */ + + bri finish_tlb_load + ex10: + /* The bailout. Restore registers to pre-exception conditions + * and call the heavyweights to help us out. + */ + mts rpid, r11 + nop + bri 4 + RESTORE_STATE; + bri page_fault_instr_trap + +/* Both the instruction and data TLB miss get to this point to load the TLB. + * r3 - EA of fault + * r4 - TLB LO (info from Linux PTE) + * r5, r6 - available to use + * PID - loaded with proper value when we get here + * Upon exit, we reload everything and RFI. + * A common place to load the TLB. + */ + tlb_index: + .long 1 /* MS: storing last used tlb index */ + finish_tlb_load: + /* MS: load the last used TLB index. */ + lwi r5, r0, TOPHYS(tlb_index) + addik r5, r5, 1 /* MS: inc tlb_index -> use next one */ + +/* MS: FIXME this is potential fault, because this is mask not count */ + andi r5, r5, (MICROBLAZE_TLB_SIZE-1) + ori r6, r0, 1 + cmp r31, r5, r6 + blti r31, sem + addik r5, r6, 1 + sem: + /* MS: save back current TLB index */ + swi r5, r0, TOPHYS(tlb_index) + + ori r4, r4, _PAGE_HWEXEC /* make it executable */ + mts rtlbx, r5 /* MS: save current TLB */ + nop + mts rtlblo, r4 /* MS: save to TLB LO */ + nop + + /* Create EPN. This is the faulting address plus a static + * set of bits. These are size, valid, E, U0, and ensure + * bits 20 and 21 are zero. + */ + andi r3, r3, 0xfffff000 + ori r3, r3, 0x0c0 + mts rtlbhi, r3 /* Load TLB HI */ + nop + + /* Done...restore registers and get out of here. */ + ex12: + mts rpid, r11 + nop + bri 4 + RESTORE_STATE; + rted r17, 0 + nop + + /* extern void giveup_fpu(struct task_struct *prev) + * + * The MicroBlaze processor may have an FPU, so this should not just + * return: TBD. + */ + .globl giveup_fpu; + .align 4; + giveup_fpu: + bralid r15,0 /* TBD */ + nop + + /* At present, this routine just hangs. - extern void abort(void) */ + .globl abort; + .align 4; + abort: + br r0 + + .globl set_context; + .align 4; + set_context: + mts rpid, r5 /* Shadow TLBs are automatically */ + nop + bri 4 /* flushed by changing PID */ + rtsd r15,8 + nop + +#endif .end _hw_exception_handler +#ifdef CONFIG_MMU +/* Unaligned data access exception last on a 4k page for MMU. + * When this is called, we are in virtual mode with exceptions enabled + * and registers 1-13,15,17,18 saved. + * + * R3 = ESR + * R4 = EAR + * R7 = pointer to saved registers (struct pt_regs *regs) + * + * This handler perform the access, and returns via ret_from_exc. + */ +.global _unaligned_data_exception +.ent _unaligned_data_exception +_unaligned_data_exception: + andi r8, r3, 0x3E0; /* Mask and extract the register operand */ + BSRLI(r8,r8,2); /* r8 >> 2 = register operand * 8 */ + andi r6, r3, 0x400; /* Extract ESR[S] */ + bneid r6, ex_sw_vm; + andi r6, r3, 0x800; /* Extract ESR[W] - delay slot */ +ex_lw_vm: + beqid r6, ex_lhw_vm; + lbui r5, r4, 0; /* Exception address in r4 - delay slot */ +/* Load a word, byte-by-byte from destination address and save it in tmp space*/ + la r6, r0, ex_tmp_data_loc_0; + sbi r5, r6, 0; + lbui r5, r4, 1; + sbi r5, r6, 1; + lbui r5, r4, 2; + sbi r5, r6, 2; + lbui r5, r4, 3; + sbi r5, r6, 3; + brid ex_lw_tail_vm; +/* Get the destination register value into r3 - delay slot */ + lwi r3, r6, 0; +ex_lhw_vm: + /* Load a half-word, byte-by-byte from destination address and + * save it in tmp space */ + la r6, r0, ex_tmp_data_loc_0; + sbi r5, r6, 0; + lbui r5, r4, 1; + sbi r5, r6, 1; + lhui r3, r6, 0; /* Get the destination register value into r3 */ +ex_lw_tail_vm: + /* Form load_word jump table offset (lw_table_vm + (8 * regnum)) */ + addik r5, r8, lw_table_vm; + bra r5; +ex_lw_end_vm: /* Exception handling of load word, ends */ + brai ret_from_exc; +ex_sw_vm: +/* Form store_word jump table offset (sw_table_vm + (8 * regnum)) */ + addik r5, r8, sw_table_vm; + bra r5; +ex_sw_tail_vm: + la r5, r0, ex_tmp_data_loc_0; + beqid r6, ex_shw_vm; + swi r3, r5, 0; /* Get the word - delay slot */ + /* Store the word, byte-by-byte into destination address */ + lbui r3, r5, 0; + sbi r3, r4, 0; + lbui r3, r5, 1; + sbi r3, r4, 1; + lbui r3, r5, 2; + sbi r3, r4, 2; + lbui r3, r5, 3; + brid ret_from_exc; + sbi r3, r4, 3; /* Delay slot */ +ex_shw_vm: + /* Store the lower half-word, byte-by-byte into destination address */ + lbui r3, r5, 2; + sbi r3, r4, 0; + lbui r3, r5, 3; + brid ret_from_exc; + sbi r3, r4, 1; /* Delay slot */ +ex_sw_end_vm: /* Exception handling of store word, ends. */ +.end _unaligned_data_exception +#endif /* CONFIG_MMU */ + ex_handler_unhandled: /* FIXME add handle function for unhandled exception - dump register */ bri 0 +/* + * hw_exception_handler Jump Table + * - Contains code snippets for each register that caused the unalign exception + * - Hence exception handler is NOT self-modifying + * - Separate table for load exceptions and store exceptions. + * - Each table is of size: (8 * 32) = 256 bytes + */ + .section .text .align 4 lw_table: @@ -407,7 +1061,11 @@ lw_r27: R3_TO_LWREG (27); lw_r28: R3_TO_LWREG (28); lw_r29: R3_TO_LWREG (29); lw_r30: R3_TO_LWREG (30); +#ifdef CONFIG_MMU +lw_r31: R3_TO_LWREG_V (31); +#else lw_r31: R3_TO_LWREG (31); +#endif sw_table: sw_r0: SWREG_TO_R3 (0); @@ -441,7 +1099,81 @@ sw_r27: SWREG_TO_R3 (27); sw_r28: SWREG_TO_R3 (28); sw_r29: SWREG_TO_R3 (29); sw_r30: SWREG_TO_R3 (30); +#ifdef CONFIG_MMU +sw_r31: SWREG_TO_R3_V (31); +#else sw_r31: SWREG_TO_R3 (31); +#endif + +#ifdef CONFIG_MMU +lw_table_vm: +lw_r0_vm: R3_TO_LWREG_VM (0); +lw_r1_vm: R3_TO_LWREG_VM_V (1); +lw_r2_vm: R3_TO_LWREG_VM_V (2); +lw_r3_vm: R3_TO_LWREG_VM_V (3); +lw_r4_vm: R3_TO_LWREG_VM_V (4); +lw_r5_vm: R3_TO_LWREG_VM_V (5); +lw_r6_vm: R3_TO_LWREG_VM_V (6); +lw_r7_vm: R3_TO_LWREG_VM_V (7); +lw_r8_vm: R3_TO_LWREG_VM_V (8); +lw_r9_vm: R3_TO_LWREG_VM_V (9); +lw_r10_vm: R3_TO_LWREG_VM_V (10); +lw_r11_vm: R3_TO_LWREG_VM_V (11); +lw_r12_vm: R3_TO_LWREG_VM_V (12); +lw_r13_vm: R3_TO_LWREG_VM_V (13); +lw_r14_vm: R3_TO_LWREG_VM (14); +lw_r15_vm: R3_TO_LWREG_VM_V (15); +lw_r16_vm: R3_TO_LWREG_VM (16); +lw_r17_vm: R3_TO_LWREG_VM_V (17); +lw_r18_vm: R3_TO_LWREG_VM_V (18); +lw_r19_vm: R3_TO_LWREG_VM (19); +lw_r20_vm: R3_TO_LWREG_VM (20); +lw_r21_vm: R3_TO_LWREG_VM (21); +lw_r22_vm: R3_TO_LWREG_VM (22); +lw_r23_vm: R3_TO_LWREG_VM (23); +lw_r24_vm: R3_TO_LWREG_VM (24); +lw_r25_vm: R3_TO_LWREG_VM (25); +lw_r26_vm: R3_TO_LWREG_VM (26); +lw_r27_vm: R3_TO_LWREG_VM (27); +lw_r28_vm: R3_TO_LWREG_VM (28); +lw_r29_vm: R3_TO_LWREG_VM (29); +lw_r30_vm: R3_TO_LWREG_VM (30); +lw_r31_vm: R3_TO_LWREG_VM_V (31); + +sw_table_vm: +sw_r0_vm: SWREG_TO_R3_VM (0); +sw_r1_vm: SWREG_TO_R3_VM_V (1); +sw_r2_vm: SWREG_TO_R3_VM_V (2); +sw_r3_vm: SWREG_TO_R3_VM_V (3); +sw_r4_vm: SWREG_TO_R3_VM_V (4); +sw_r5_vm: SWREG_TO_R3_VM_V (5); +sw_r6_vm: SWREG_TO_R3_VM_V (6); +sw_r7_vm: SWREG_TO_R3_VM_V (7); +sw_r8_vm: SWREG_TO_R3_VM_V (8); +sw_r9_vm: SWREG_TO_R3_VM_V (9); +sw_r10_vm: SWREG_TO_R3_VM_V (10); +sw_r11_vm: SWREG_TO_R3_VM_V (11); +sw_r12_vm: SWREG_TO_R3_VM_V (12); +sw_r13_vm: SWREG_TO_R3_VM_V (13); +sw_r14_vm: SWREG_TO_R3_VM (14); +sw_r15_vm: SWREG_TO_R3_VM_V (15); +sw_r16_vm: SWREG_TO_R3_VM (16); +sw_r17_vm: SWREG_TO_R3_VM_V (17); +sw_r18_vm: SWREG_TO_R3_VM_V (18); +sw_r19_vm: SWREG_TO_R3_VM (19); +sw_r20_vm: SWREG_TO_R3_VM (20); +sw_r21_vm: SWREG_TO_R3_VM (21); +sw_r22_vm: SWREG_TO_R3_VM (22); +sw_r23_vm: SWREG_TO_R3_VM (23); +sw_r24_vm: SWREG_TO_R3_VM (24); +sw_r25_vm: SWREG_TO_R3_VM (25); +sw_r26_vm: SWREG_TO_R3_VM (26); +sw_r27_vm: SWREG_TO_R3_VM (27); +sw_r28_vm: SWREG_TO_R3_VM (28); +sw_r29_vm: SWREG_TO_R3_VM (29); +sw_r30_vm: SWREG_TO_R3_VM (30); +sw_r31_vm: SWREG_TO_R3_VM_V (31); +#endif /* CONFIG_MMU */ /* Temporary data structures used in the handler */ .section .data diff --git a/arch/microblaze/kernel/microblaze_ksyms.c b/arch/microblaze/kernel/microblaze_ksyms.c index 5f71790e3c3c..59ff20e33e0c 100644 --- a/arch/microblaze/kernel/microblaze_ksyms.c +++ b/arch/microblaze/kernel/microblaze_ksyms.c @@ -45,3 +45,5 @@ extern void __udivsi3(void); EXPORT_SYMBOL(__udivsi3); extern void __umodsi3(void); EXPORT_SYMBOL(__umodsi3); +extern char *_ebss; +EXPORT_SYMBOL_GPL(_ebss); diff --git a/arch/microblaze/kernel/misc.S b/arch/microblaze/kernel/misc.S new file mode 100644 index 000000000000..df16c6287a8e --- /dev/null +++ b/arch/microblaze/kernel/misc.S @@ -0,0 +1,120 @@ +/* + * Miscellaneous low-level MMU functions. + * + * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2008-2009 PetaLogix + * Copyright (C) 2007 Xilinx, Inc. All rights reserved. + * + * Derived from arch/ppc/kernel/misc.S + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + */ + +#include <linux/linkage.h> +#include <linux/sys.h> +#include <asm/unistd.h> +#include <linux/errno.h> +#include <asm/mmu.h> +#include <asm/page.h> + + .text +/* + * Flush MMU TLB + * + * We avoid flushing the pinned 0, 1 and possibly 2 entries. + */ +.globl _tlbia; +.align 4; +_tlbia: + addik r12, r0, 63 /* flush all entries (63 - 3) */ + /* isync */ +_tlbia_1: + mts rtlbx, r12 + nop + mts rtlbhi, r0 /* flush: ensure V is clear */ + nop + addik r11, r12, -2 + bneid r11, _tlbia_1 /* loop for all entries */ + addik r12, r12, -1 + /* sync */ + rtsd r15, 8 + nop + +/* + * Flush MMU TLB for a particular address (in r5) + */ +.globl _tlbie; +.align 4; +_tlbie: + mts rtlbsx, r5 /* look up the address in TLB */ + nop + mfs r12, rtlbx /* Retrieve index */ + nop + blti r12, _tlbie_1 /* Check if found */ + mts rtlbhi, r0 /* flush: ensure V is clear */ + nop +_tlbie_1: + rtsd r15, 8 + nop + +/* + * Allocate TLB entry for early console + */ +.globl early_console_reg_tlb_alloc; +.align 4; +early_console_reg_tlb_alloc: + /* + * Load a TLB entry for the UART, so that microblaze_progress() can use + * the UARTs nice and early. We use a 4k real==virtual mapping. + */ + ori r4, r0, 63 + mts rtlbx, r4 /* TLB slot 2 */ + + or r4,r5,r0 + andi r4,r4,0xfffff000 + ori r4,r4,(TLB_WR|TLB_I|TLB_M|TLB_G) + + andi r5,r5,0xfffff000 + ori r5,r5,(TLB_VALID | TLB_PAGESZ(PAGESZ_4K)) + + mts rtlblo,r4 /* Load the data portion of the entry */ + nop + mts rtlbhi,r5 /* Load the tag portion of the entry */ + nop + rtsd r15, 8 + nop + +/* + * Copy a whole page (4096 bytes). + */ +#define COPY_16_BYTES \ + lwi r7, r6, 0; \ + lwi r8, r6, 4; \ + lwi r9, r6, 8; \ + lwi r10, r6, 12; \ + swi r7, r5, 0; \ + swi r8, r5, 4; \ + swi r9, r5, 8; \ + swi r10, r5, 12 + + +/* FIXME DCACHE_LINE_BYTES (CONFIG_XILINX_MICROBLAZE0_DCACHE_LINE_LEN * 4)*/ +#define DCACHE_LINE_BYTES (4 * 4) + +.globl copy_page; +.align 4; +copy_page: + ori r11, r0, (PAGE_SIZE/DCACHE_LINE_BYTES) - 1 +_copy_page_loop: + COPY_16_BYTES +#if DCACHE_LINE_BYTES >= 32 + COPY_16_BYTES +#endif + addik r6, r6, DCACHE_LINE_BYTES + addik r5, r5, DCACHE_LINE_BYTES + bneid r11, _copy_page_loop + addik r11, r11, -1 + rtsd r15, 8 + nop diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index 07d4fa339eda..00b12c6d5326 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -126,9 +126,54 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, else childregs->r1 = ((unsigned long) ti) + THREAD_SIZE; +#ifndef CONFIG_MMU memset(&ti->cpu_context, 0, sizeof(struct cpu_context)); ti->cpu_context.r1 = (unsigned long)childregs; ti->cpu_context.msr = (unsigned long)childregs->msr; +#else + + /* if creating a kernel thread then update the current reg (we don't + * want to use the parent's value when restoring by POP_STATE) */ + if (kernel_mode(regs)) + /* save new current on stack to use POP_STATE */ + childregs->CURRENT_TASK = (unsigned long)p; + /* if returning to user then use the parent's value of this register */ + + /* if we're creating a new kernel thread then just zeroing all + * the registers. That's OK for a brand new thread.*/ + /* Pls. note that some of them will be restored in POP_STATE */ + if (kernel_mode(regs)) + memset(&ti->cpu_context, 0, sizeof(struct cpu_context)); + /* if this thread is created for fork/vfork/clone, then we want to + * restore all the parent's context */ + /* in addition to the registers which will be restored by POP_STATE */ + else { + ti->cpu_context = *(struct cpu_context *)regs; + childregs->msr |= MSR_UMS; + } + + /* FIXME STATE_SAVE_PT_OFFSET; */ + ti->cpu_context.r1 = (unsigned long)childregs - STATE_SAVE_ARG_SPACE; + /* we should consider the fact that childregs is a copy of the parent + * regs which were saved immediately after entering the kernel state + * before enabling VM. This MSR will be restored in switch_to and + * RETURN() and we want to have the right machine state there + * specifically this state must have INTs disabled before and enabled + * after performing rtbd + * compose the right MSR for RETURN(). It will work for switch_to also + * excepting for VM and UMS + * don't touch UMS , CARRY and cache bits + * right now MSR is a copy of parent one */ + childregs->msr |= MSR_BIP; + childregs->msr &= ~MSR_EIP; + childregs->msr |= MSR_IE; + childregs->msr &= ~MSR_VM; + childregs->msr |= MSR_VMS; + childregs->msr |= MSR_EE; /* exceptions will be enabled*/ + + ti->cpu_context.msr = (childregs->msr|MSR_VM); + ti->cpu_context.msr &= ~MSR_UMS; /* switch_to to kernel mode */ +#endif ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8; if (clone_flags & CLONE_SETTLS) @@ -137,6 +182,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, return 0; } +#ifndef CONFIG_MMU /* * Return saved PC of a blocked thread. */ @@ -151,6 +197,7 @@ unsigned long thread_saved_pc(struct task_struct *tsk) else return ctx->r14; } +#endif static void kernel_thread_helper(int (*fn)(void *), void *arg) { @@ -173,6 +220,7 @@ int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL); } +EXPORT_SYMBOL_GPL(kernel_thread); unsigned long get_wchan(struct task_struct *p) { @@ -188,3 +236,14 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp) regs->r1 = usp; regs->pt_mode = 0; } + +#ifdef CONFIG_MMU +#include <linux/elfcore.h> +/* + * Set up a thread for executing a new program + */ +int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs) +{ + return 0; /* MicroBlaze has no separate FPU registers */ +} +#endif /* CONFIG_MMU */ diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index 34c48718061a..c005cc6f1aaf 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -509,12 +509,13 @@ static void __init early_init_dt_check_for_initrd(unsigned long node) prop = of_get_flat_dt_prop(node, "linux,initrd-start", &l); if (prop) { - initrd_start = (unsigned long)__va(of_read_ulong(prop, l/4)); + initrd_start = (unsigned long) + __va((u32)of_read_ulong(prop, l/4)); prop = of_get_flat_dt_prop(node, "linux,initrd-end", &l); if (prop) { initrd_end = (unsigned long) - __va(of_read_ulong(prop, l/4)); + __va((u32)of_read_ulong(prop, 1/4)); initrd_below_start_ok = 1; } else { initrd_start = 0; @@ -563,7 +564,9 @@ static int __init early_init_dt_scan_chosen(unsigned long node, strlcpy(cmd_line, p, min((int)l, COMMAND_LINE_SIZE)); #ifdef CONFIG_CMDLINE +#ifndef CONFIG_CMDLINE_FORCE if (p == NULL || l == 0 || (l == 1 && (*p) == 0)) +#endif strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); #endif /* CONFIG_CMDLINE */ diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c index eb6b41758e23..8709bea09604 100644 --- a/arch/microblaze/kernel/setup.c +++ b/arch/microblaze/kernel/setup.c @@ -42,10 +42,6 @@ char cmd_line[COMMAND_LINE_SIZE]; void __init setup_arch(char **cmdline_p) { -#ifdef CONFIG_CMDLINE_FORCE - strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); - strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); -#endif *cmdline_p = cmd_line; console_verbose(); @@ -102,14 +98,34 @@ void __init machine_early_init(const char *cmdline, unsigned int ram, { unsigned long *src, *dst = (unsigned long *)0x0; + /* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the + * end of kernel. There are two position which we want to check. + * The first is __init_end and the second __bss_start. + */ +#ifdef CONFIG_MTD_UCLINUX + int romfs_size; + unsigned int romfs_base; + char *old_klimit = klimit; + + romfs_base = (ram ? ram : (unsigned int)&__init_end); + romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); + if (!romfs_size) { + romfs_base = (unsigned int)&__bss_start; + romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); + } + + /* Move ROMFS out of BSS before clearing it */ + if (romfs_size > 0) { + memmove(&_ebss, (int *)romfs_base, romfs_size); + klimit += romfs_size; + } +#endif + /* clearing bss section */ memset(__bss_start, 0, __bss_stop-__bss_start); memset(_ssbss, 0, _esbss-_ssbss); - /* - * Copy command line passed from bootloader, or use default - * if none provided, or forced - */ + /* Copy command line passed from bootloader */ #ifndef CONFIG_CMDLINE_BOOL if (cmdline && cmdline[0] != '\0') strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE); @@ -126,27 +142,15 @@ void __init machine_early_init(const char *cmdline, unsigned int ram, printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt); #ifdef CONFIG_MTD_UCLINUX - { - int size; - unsigned int romfs_base; - romfs_base = (ram ? ram : (unsigned int)&__init_end); - /* if CONFIG_MTD_UCLINUX_EBSS is defined, assume ROMFS is at the - * end of kernel, which is ROMFS_LOCATION defined above. */ - size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); - early_printk("Found romfs @ 0x%08x (0x%08x)\n", - romfs_base, size); - early_printk("#### klimit %p ####\n", klimit); - BUG_ON(size < 0); /* What else can we do? */ - - /* Use memmove to handle likely case of memory overlap */ - early_printk("Moving 0x%08x bytes from 0x%08x to 0x%08x\n", - size, romfs_base, (unsigned)&_ebss); - memmove(&_ebss, (int *)romfs_base, size); - - /* update klimit */ - klimit += PAGE_ALIGN(size); - early_printk("New klimit: 0x%08x\n", (unsigned)klimit); - } + early_printk("Found romfs @ 0x%08x (0x%08x)\n", + romfs_base, romfs_size); + early_printk("#### klimit %p ####\n", old_klimit); + BUG_ON(romfs_size < 0); /* What else can we do? */ + + early_printk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n", + romfs_size, romfs_base, (unsigned)&_ebss); + + early_printk("New klimit: 0x%08x\n", (unsigned)klimit); #endif for (src = __ivt_start; src < __ivt_end; src++, dst++) diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c index 40d36931e363..4c0e6521b114 100644 --- a/arch/microblaze/kernel/signal.c +++ b/arch/microblaze/kernel/signal.c @@ -152,8 +152,8 @@ struct rt_sigframe { unsigned long tramp[2]; /* signal trampoline */ }; -static int -restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *rval_p) +static int restore_sigcontext(struct pt_regs *regs, + struct sigcontext __user *sc, int *rval_p) { unsigned int err = 0; @@ -211,11 +211,10 @@ badframe: asmlinkage int sys_rt_sigreturn(struct pt_regs *regs) { - struct rt_sigframe *frame = - (struct rt_sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE); + struct rt_sigframe __user *frame = + (struct rt_sigframe __user *)(regs->r1 + STATE_SAVE_ARG_SPACE); sigset_t set; - stack_t st; int rval; if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) @@ -233,11 +232,10 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs) if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval)) goto badframe; - if (__copy_from_user((void *)&st, &frame->uc.uc_stack, sizeof(st))) - goto badframe; /* It is more difficult to avoid calling this function than to call it and ignore errors. */ - do_sigaltstack(&st, NULL, regs->r1); + if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->r1)) + goto badframe; return rval; @@ -251,7 +249,7 @@ badframe: */ static int -setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, +setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned long mask) { int err = 0; @@ -278,7 +276,7 @@ setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, /* * Determine which stack to use.. */ -static inline void * +static inline void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) { /* Default to using normal stack */ @@ -287,87 +285,13 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) sp = current->sas_ss_sp + current->sas_ss_size; - return (void *)((sp - frame_size) & -8UL); -} - -static void setup_frame(int sig, struct k_sigaction *ka, - sigset_t *set, struct pt_regs *regs) -{ - struct sigframe *frame; - int err = 0; - int signal; - - frame = get_sigframe(ka, regs, sizeof(*frame)); - - if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto give_sigsegv; - - signal = current_thread_info()->exec_domain - && current_thread_info()->exec_domain->signal_invmap - && sig < 32 - ? current_thread_info()->exec_domain->signal_invmap[sig] - : sig; - - err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); - - if (_NSIG_WORDS > 1) { - err |= __copy_to_user(frame->extramask, &set->sig[1], - sizeof(frame->extramask)); - } - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - /* minus 8 is offset to cater for "rtsd r15,8" offset */ - if (ka->sa.sa_flags & SA_RESTORER) { - regs->r15 = ((unsigned long)ka->sa.sa_restorer)-8; - } else { - /* Note, these encodings are _big endian_! */ - - /* addi r12, r0, __NR_sigreturn */ - err |= __put_user(0x31800000 | __NR_sigreturn , - frame->tramp + 0); - /* brki r14, 0x8 */ - err |= __put_user(0xb9cc0008, frame->tramp + 1); - - /* Return from sighandler will jump to the tramp. - Negative 8 offset because return is rtsd r15, 8 */ - regs->r15 = ((unsigned long)frame->tramp)-8; - - __invalidate_cache_sigtramp((unsigned long)frame->tramp); - } - - if (err) - goto give_sigsegv; - - /* Set up registers for signal handler */ - regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE; - - /* Signal handler args: */ - regs->r5 = signal; /* Arg 0: signum */ - regs->r6 = (unsigned long) &frame->sc; /* arg 1: sigcontext */ - - /* Offset of 4 to handle microblaze rtid r14, 0 */ - regs->pc = (unsigned long)ka->sa.sa_handler; - - set_fs(USER_DS); - -#ifdef DEBUG_SIG - printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n", - current->comm, current->pid, frame, regs->pc); -#endif - - return; - -give_sigsegv: - if (sig == SIGSEGV) - ka->sa.sa_handler = SIG_DFL; - force_sig(SIGSEGV, current); + return (void __user *)((sp - frame_size) & -8UL); } static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs *regs) { - struct rt_sigframe *frame; + struct rt_sigframe __user *frame; int err = 0; int signal; @@ -382,7 +306,8 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, ? current_thread_info()->exec_domain->signal_invmap[sig] : sig; - err |= copy_siginfo_to_user(&frame->info, info); + if (info) + err |= copy_siginfo_to_user(&frame->info, info); /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); @@ -463,7 +388,15 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) case -ERESTARTNOINTR: do_restart: /* offset of 4 bytes to re-execute trap (brki) instruction */ +#ifndef CONFIG_MMU regs->pc -= 4; +#else + /* offset of 8 bytes required = 4 for rtbd + offset, plus 4 for size of + "brki r14,8" + instruction. */ + regs->pc -= 8; +#endif break; } } @@ -480,7 +413,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, if (ka->sa.sa_flags & SA_SIGINFO) setup_rt_frame(sig, ka, info, oldset, regs); else - setup_frame(sig, ka, oldset, regs); + setup_rt_frame(sig, ka, NULL, oldset, regs); if (ka->sa.sa_flags & SA_ONESHOT) ka->sa.sa_handler = SIG_DFL; diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S index 3bb42ec924c2..376d1789f7c0 100644 --- a/arch/microblaze/kernel/syscall_table.S +++ b/arch/microblaze/kernel/syscall_table.S @@ -2,7 +2,11 @@ ENTRY(sys_call_table) .long sys_restart_syscall /* 0 - old "setup()" system call, * used for restarting */ .long sys_exit - .long sys_ni_syscall /* was fork */ +#ifdef CONFIG_MMU + .long sys_fork_wrapper +#else + .long sys_ni_syscall +#endif .long sys_read .long sys_write .long sys_open /* 5 */ diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c index 293ef486013a..eaaaf805f31b 100644 --- a/arch/microblaze/kernel/traps.c +++ b/arch/microblaze/kernel/traps.c @@ -22,14 +22,6 @@ void trap_init(void) __enable_hw_exceptions(); } -void __bad_xchg(volatile void *ptr, int size) -{ - printk(KERN_INFO "xchg: bad data size: pc 0x%p, ptr 0x%p, size %d\n", - __builtin_return_address(0), ptr, size); - BUG(); -} -EXPORT_SYMBOL(__bad_xchg); - static int kstack_depth_to_print = 24; static int __init kstack_setup(char *s) @@ -105,3 +97,37 @@ void dump_stack(void) show_stack(NULL, NULL); } EXPORT_SYMBOL(dump_stack); + +#ifdef CONFIG_MMU +void __bug(const char *file, int line, void *data) +{ + if (data) + printk(KERN_CRIT "kernel BUG at %s:%d (data = %p)!\n", + file, line, data); + else + printk(KERN_CRIT "kernel BUG at %s:%d!\n", file, line); + + machine_halt(); +} + +int bad_trap(int trap_num, struct pt_regs *regs) +{ + printk(KERN_CRIT + "unimplemented trap %d called at 0x%08lx, pid %d!\n", + trap_num, regs->pc, current->pid); + return -ENOSYS; +} + +int debug_trap(struct pt_regs *regs) +{ + int i; + printk(KERN_CRIT "debug trap\n"); + for (i = 0; i < 32; i++) { + /* printk("r%i:%08X\t",i,regs->gpr[i]); */ + if ((i % 4) == 3) + printk(KERN_CRIT "\n"); + } + printk(KERN_CRIT "pc:%08lX\tmsr:%08lX\n", regs->pc, regs->msr); + return -ENOSYS; +} +#endif diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S index 840385e51291..8ae807ab7a51 100644 --- a/arch/microblaze/kernel/vmlinux.lds.S +++ b/arch/microblaze/kernel/vmlinux.lds.S @@ -17,8 +17,7 @@ ENTRY(_start) jiffies = jiffies_64 + 4; SECTIONS { - . = CONFIG_KERNEL_BASE_ADDR; - + . = CONFIG_KERNEL_START; .text : { _text = . ; _stext = . ; @@ -132,6 +131,8 @@ SECTIONS { __con_initcall_end = .; } + SECURITY_INIT + __init_end_before_initramfs = .; .init.ramfs ALIGN(4096) : { diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile index d27126bf306a..71c8cb6c9e43 100644 --- a/arch/microblaze/lib/Makefile +++ b/arch/microblaze/lib/Makefile @@ -10,4 +10,5 @@ else lib-y += memcpy.o memmove.o endif -lib-y += uaccess.o +lib-$(CONFIG_NO_MMU) += uaccess.o +lib-$(CONFIG_MMU) += uaccess_old.o diff --git a/arch/microblaze/lib/checksum.c b/arch/microblaze/lib/checksum.c index 809340070a13..f08e74591418 100644 --- a/arch/microblaze/lib/checksum.c +++ b/arch/microblaze/lib/checksum.c @@ -32,9 +32,10 @@ /* Revised by Kenneth Albanowski for m68knommu. Basic problem: unaligned access kills, so most of the assembly has to go. */ -#include <net/checksum.h> -#include <asm/checksum.h> #include <linux/module.h> +#include <net/checksum.h> + +#include <asm/byteorder.h> static inline unsigned short from32to16(unsigned long x) { @@ -102,6 +103,7 @@ __sum16 ip_fast_csum(const void *iph, unsigned int ihl) { return (__force __sum16)~do_csum(iph, ihl*4); } +EXPORT_SYMBOL(ip_fast_csum); /* * computes the checksum of a memory block at buff, length len, @@ -115,15 +117,16 @@ __sum16 ip_fast_csum(const void *iph, unsigned int ihl) * * it's best to have buff aligned on a 32-bit boundary */ -__wsum csum_partial(const void *buff, int len, __wsum sum) +__wsum csum_partial(const void *buff, int len, __wsum wsum) { + unsigned int sum = (__force unsigned int)wsum; unsigned int result = do_csum(buff, len); /* add in old sum, and carry.. */ result += sum; if (sum > result) result += 1; - return result; + return (__force __wsum)result; } EXPORT_SYMBOL(csum_partial); @@ -131,9 +134,9 @@ EXPORT_SYMBOL(csum_partial); * this routine is used for miscellaneous IP-like checksums, mainly * in icmp.c */ -__sum16 ip_compute_csum(const unsigned char *buff, int len) +__sum16 ip_compute_csum(const void *buff, int len) { - return ~do_csum(buff, len); + return (__force __sum16)~do_csum(buff, len); } EXPORT_SYMBOL(ip_compute_csum); @@ -141,12 +144,18 @@ EXPORT_SYMBOL(ip_compute_csum); * copy from fs while checksumming, otherwise like csum_partial */ __wsum -csum_partial_copy_from_user(const char __user *src, char *dst, int len, - int sum, int *csum_err) +csum_partial_copy_from_user(const void __user *src, void *dst, int len, + __wsum sum, int *csum_err) { - if (csum_err) + int missing; + + missing = __copy_from_user(dst, src, len); + if (missing) { + memset(dst + len - missing, 0, missing); + *csum_err = -EFAULT; + } else *csum_err = 0; - memcpy(dst, src, len); + return csum_partial(dst, len, sum); } EXPORT_SYMBOL(csum_partial_copy_from_user); @@ -155,7 +164,7 @@ EXPORT_SYMBOL(csum_partial_copy_from_user); * copy from ds while checksumming, otherwise like csum_partial */ __wsum -csum_partial_copy(const char *src, char *dst, int len, int sum) +csum_partial_copy(const void *src, void *dst, int len, __wsum sum) { memcpy(dst, src, len); return csum_partial(dst, len, sum); diff --git a/arch/microblaze/lib/memcpy.c b/arch/microblaze/lib/memcpy.c index 5880119c4487..6a907c58a4bc 100644 --- a/arch/microblaze/lib/memcpy.c +++ b/arch/microblaze/lib/memcpy.c @@ -154,8 +154,3 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c) } EXPORT_SYMBOL(memcpy); #endif /* __HAVE_ARCH_MEMCPY */ - -void *cacheable_memcpy(void *d, const void *s, __kernel_size_t c) -{ - return memcpy(d, s, c); -} diff --git a/arch/microblaze/lib/uaccess_old.S b/arch/microblaze/lib/uaccess_old.S new file mode 100644 index 000000000000..67f991c14b8a --- /dev/null +++ b/arch/microblaze/lib/uaccess_old.S @@ -0,0 +1,135 @@ +/* + * Copyright (C) 2009 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2009 PetaLogix + * Copyright (C) 2007 LynuxWorks, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/errno.h> +#include <linux/linkage.h> + +/* + * int __strncpy_user(char *to, char *from, int len); + * + * Returns: + * -EFAULT for an exception + * len if we hit the buffer limit + * bytes copied + */ + + .text +.globl __strncpy_user; +.align 4; +__strncpy_user: + + /* + * r5 - to + * r6 - from + * r7 - len + * r3 - temp count + * r4 - temp val + */ + addik r3,r7,0 /* temp_count = len */ + beqi r3,3f +1: + lbu r4,r6,r0 + sb r4,r5,r0 + + addik r3,r3,-1 + beqi r3,2f /* break on len */ + + addik r5,r5,1 + bneid r4,1b + addik r6,r6,1 /* delay slot */ + addik r3,r3,1 /* undo "temp_count--" */ +2: + rsubk r3,r3,r7 /* temp_count = len - temp_count */ +3: + rtsd r15,8 + nop + + + .section .fixup, "ax" + .align 2 +4: + brid 3b + addik r3,r0, -EFAULT + + .section __ex_table, "a" + .word 1b,4b + +/* + * int __strnlen_user(char __user *str, int maxlen); + * + * Returns: + * 0 on error + * maxlen + 1 if no NUL byte found within maxlen bytes + * size of the string (including NUL byte) + */ + + .text +.globl __strnlen_user; +.align 4; +__strnlen_user: + addik r3,r6,0 + beqi r3,3f +1: + lbu r4,r5,r0 + beqid r4,2f /* break on NUL */ + addik r3,r3,-1 /* delay slot */ + + bneid r3,1b + addik r5,r5,1 /* delay slot */ + + addik r3,r3,-1 /* for break on len */ +2: + rsubk r3,r3,r6 +3: + rtsd r15,8 + nop + + + .section .fixup,"ax" +4: + brid 3b + addk r3,r0,r0 + + .section __ex_table,"a" + .word 1b,4b + +/* + * int __copy_tofrom_user(char *to, char *from, int len) + * Return: + * 0 on success + * number of not copied bytes on error + */ + .text +.globl __copy_tofrom_user; +.align 4; +__copy_tofrom_user: + /* + * r5 - to + * r6 - from + * r7, r3 - count + * r4 - tempval + */ + addik r3,r7,0 + beqi r3,3f +1: + lbu r4,r6,r0 + addik r6,r6,1 +2: + sb r4,r5,r0 + addik r3,r3,-1 + bneid r3,1b + addik r5,r5,1 /* delay slot */ +3: + rtsd r15,8 + nop + + + .section __ex_table,"a" + .word 1b,3b,2b,3b diff --git a/arch/microblaze/mm/Makefile b/arch/microblaze/mm/Makefile index bf9e4479a1fd..6c8a924d9e26 100644 --- a/arch/microblaze/mm/Makefile +++ b/arch/microblaze/mm/Makefile @@ -3,3 +3,5 @@ # obj-y := init.o + +obj-$(CONFIG_MMU) += pgtable.o mmu_context.o fault.o diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c new file mode 100644 index 000000000000..5e67cd1fab40 --- /dev/null +++ b/arch/microblaze/mm/fault.c @@ -0,0 +1,304 @@ +/* + * arch/microblaze/mm/fault.c + * + * Copyright (C) 2007 Xilinx, Inc. All rights reserved. + * + * Derived from "arch/ppc/mm/fault.c" + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * + * Derived from "arch/i386/mm/fault.c" + * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds + * + * Modified by Cort Dougan and Paul Mackerras. + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + */ + +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/ptrace.h> +#include <linux/mman.h> +#include <linux/mm.h> +#include <linux/interrupt.h> + +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/mmu.h> +#include <asm/mmu_context.h> +#include <asm/system.h> +#include <linux/uaccess.h> +#include <asm/exceptions.h> + +#if defined(CONFIG_KGDB) +int debugger_kernel_faults = 1; +#endif + +static unsigned long pte_misses; /* updated by do_page_fault() */ +static unsigned long pte_errors; /* updated by do_page_fault() */ + +/* + * Check whether the instruction at regs->pc is a store using + * an update addressing form which will update r1. + */ +static int store_updates_sp(struct pt_regs *regs) +{ + unsigned int inst; + + if (get_user(inst, (unsigned int *)regs->pc)) + return 0; + /* check for 1 in the rD field */ + if (((inst >> 21) & 0x1f) != 1) + return 0; + /* check for store opcodes */ + if ((inst & 0xd0000000) == 0xd0000000) + return 1; + return 0; +} + + +/* + * bad_page_fault is called when we have a bad access from the kernel. + * It is called from do_page_fault above and from some of the procedures + * in traps.c. + */ +static void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig) +{ + const struct exception_table_entry *fixup; +/* MS: no context */ + /* Are we prepared to handle this fault? */ + fixup = search_exception_tables(regs->pc); + if (fixup) { + regs->pc = fixup->fixup; + return; + } + + /* kernel has accessed a bad area */ +#if defined(CONFIG_KGDB) + if (debugger_kernel_faults) + debugger(regs); +#endif + die("kernel access of bad area", regs, sig); +} + +/* + * The error_code parameter is ESR for a data fault, + * 0 for an instruction fault. + */ +void do_page_fault(struct pt_regs *regs, unsigned long address, + unsigned long error_code) +{ + struct vm_area_struct *vma; + struct mm_struct *mm = current->mm; + siginfo_t info; + int code = SEGV_MAPERR; + int is_write = error_code & ESR_S; + int fault; + + regs->ear = address; + regs->esr = error_code; + + /* On a kernel SLB miss we can only check for a valid exception entry */ + if (kernel_mode(regs) && (address >= TASK_SIZE)) { + printk(KERN_WARNING "kernel task_size exceed"); + _exception(SIGSEGV, regs, code, address); + } + + /* for instr TLB miss and instr storage exception ESR_S is undefined */ + if ((error_code & 0x13) == 0x13 || (error_code & 0x11) == 0x11) + is_write = 0; + +#if defined(CONFIG_KGDB) + if (debugger_fault_handler && regs->trap == 0x300) { + debugger_fault_handler(regs); + return; + } +#endif /* CONFIG_KGDB */ + + if (in_atomic() || mm == NULL) { + /* FIXME */ + if (kernel_mode(regs)) { + printk(KERN_EMERG + "Page fault in kernel mode - Oooou!!! pid %d\n", + current->pid); + _exception(SIGSEGV, regs, code, address); + return; + } + /* in_atomic() in user mode is really bad, + as is current->mm == NULL. */ + printk(KERN_EMERG "Page fault in user mode with " + "in_atomic(), mm = %p\n", mm); + printk(KERN_EMERG "r15 = %lx MSR = %lx\n", + regs->r15, regs->msr); + die("Weird page fault", regs, SIGSEGV); + } + + /* When running in the kernel we expect faults to occur only to + * addresses in user space. All other faults represent errors in the + * kernel and should generate an OOPS. Unfortunately, in the case of an + * erroneous fault occurring in a code path which already holds mmap_sem + * we will deadlock attempting to validate the fault against the + * address space. Luckily the kernel only validly references user + * space from well defined areas of code, which are listed in the + * exceptions table. + * + * As the vast majority of faults will be valid we will only perform + * the source reference check when there is a possibility of a deadlock. + * Attempt to lock the address space, if we cannot we then validate the + * source. If this is invalid we can skip the address space check, + * thus avoiding the deadlock. + */ + if (!down_read_trylock(&mm->mmap_sem)) { + if (kernel_mode(regs) && !search_exception_tables(regs->pc)) + goto bad_area_nosemaphore; + + down_read(&mm->mmap_sem); + } + + vma = find_vma(mm, address); + if (!vma) + goto bad_area; + + if (vma->vm_start <= address) + goto good_area; + + if (!(vma->vm_flags & VM_GROWSDOWN)) + goto bad_area; + + if (!is_write) + goto bad_area; + + /* + * N.B. The ABI allows programs to access up to + * a few hundred bytes below the stack pointer (TBD). + * The kernel signal delivery code writes up to about 1.5kB + * below the stack pointer (r1) before decrementing it. + * The exec code can write slightly over 640kB to the stack + * before setting the user r1. Thus we allow the stack to + * expand to 1MB without further checks. + */ + if (address + 0x100000 < vma->vm_end) { + + /* get user regs even if this fault is in kernel mode */ + struct pt_regs *uregs = current->thread.regs; + if (uregs == NULL) + goto bad_area; + + /* + * A user-mode access to an address a long way below + * the stack pointer is only valid if the instruction + * is one which would update the stack pointer to the + * address accessed if the instruction completed, + * i.e. either stwu rs,n(r1) or stwux rs,r1,rb + * (or the byte, halfword, float or double forms). + * + * If we don't check this then any write to the area + * between the last mapped region and the stack will + * expand the stack rather than segfaulting. + */ + if (address + 2048 < uregs->r1 + && (kernel_mode(regs) || !store_updates_sp(regs))) + goto bad_area; + } + if (expand_stack(vma, address)) + goto bad_area; + +good_area: + code = SEGV_ACCERR; + + /* a write */ + if (is_write) { + if (!(vma->vm_flags & VM_WRITE)) + goto bad_area; + /* a read */ + } else { + /* protection fault */ + if (error_code & 0x08000000) + goto bad_area; + if (!(vma->vm_flags & (VM_READ | VM_EXEC))) + goto bad_area; + } + + /* + * If for any reason at all we couldn't handle the fault, + * make sure we exit gracefully rather than endlessly redo + * the fault. + */ +survive: + fault = handle_mm_fault(mm, vma, address, is_write); + if (unlikely(fault & VM_FAULT_ERROR)) { + if (fault & VM_FAULT_OOM) + goto out_of_memory; + else if (fault & VM_FAULT_SIGBUS) + goto do_sigbus; + BUG(); + } + if (fault & VM_FAULT_MAJOR) + current->maj_flt++; + else + current->min_flt++; + up_read(&mm->mmap_sem); + /* + * keep track of tlb+htab misses that are good addrs but + * just need pte's created via handle_mm_fault() + * -- Cort + */ + pte_misses++; + return; + +bad_area: + up_read(&mm->mmap_sem); + +bad_area_nosemaphore: + pte_errors++; + + /* User mode accesses cause a SIGSEGV */ + if (user_mode(regs)) { + _exception(SIGSEGV, regs, code, address); +/* info.si_signo = SIGSEGV; + info.si_errno = 0; + info.si_code = code; + info.si_addr = (void *) address; + force_sig_info(SIGSEGV, &info, current);*/ + return; + } + + bad_page_fault(regs, address, SIGSEGV); + return; + +/* + * We ran out of memory, or some other thing happened to us that made + * us unable to handle the page fault gracefully. + */ +out_of_memory: + if (current->pid == 1) { + yield(); + down_read(&mm->mmap_sem); + goto survive; + } + up_read(&mm->mmap_sem); + printk(KERN_WARNING "VM: killing process %s\n", current->comm); + if (user_mode(regs)) + do_exit(SIGKILL); + bad_page_fault(regs, address, SIGKILL); + return; + +do_sigbus: + up_read(&mm->mmap_sem); + if (user_mode(regs)) { + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = BUS_ADRERR; + info.si_addr = (void __user *)address; + force_sig_info(SIGBUS, &info, current); + return; + } + bad_page_fault(regs, address, SIGBUS); +} diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c index b0c8213cd6cf..b5a701cd71e0 100644 --- a/arch/microblaze/mm/init.c +++ b/arch/microblaze/mm/init.c @@ -23,8 +23,16 @@ #include <asm/sections.h> #include <asm/tlb.h> +#ifndef CONFIG_MMU unsigned int __page_offset; -/* EXPORT_SYMBOL(__page_offset); */ +EXPORT_SYMBOL(__page_offset); + +#else +DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); + +int mem_init_done; +static int init_bootmem_done; +#endif /* CONFIG_MMU */ char *klimit = _end; @@ -32,28 +40,26 @@ char *klimit = _end; * Initialize the bootmem system and give it all the memory we * have available. */ -unsigned int memory_start; -unsigned int memory_end; /* due to mm/nommu.c */ -unsigned int memory_size; +unsigned long memory_start; +unsigned long memory_end; /* due to mm/nommu.c */ +unsigned long memory_size; /* * paging_init() sets up the page tables - in fact we've already done this. */ static void __init paging_init(void) { - int i; unsigned long zones_size[MAX_NR_ZONES]; + /* Clean every zones */ + memset(zones_size, 0, sizeof(zones_size)); + /* * old: we can DMA to/from any address.put all page into ZONE_DMA * We use only ZONE_NORMAL */ zones_size[ZONE_NORMAL] = max_mapnr; - /* every other zones are empty */ - for (i = 1; i < MAX_NR_ZONES; i++) - zones_size[i] = 0; - free_area_init(zones_size); } @@ -61,6 +67,7 @@ void __init setup_memory(void) { int i; unsigned long map_size; +#ifndef CONFIG_MMU u32 kernel_align_start, kernel_align_size; /* Find main memory where is the kernel */ @@ -93,6 +100,7 @@ void __init setup_memory(void) __func__, kernel_align_start, kernel_align_start + kernel_align_size, kernel_align_size); +#endif /* * Kernel: * start: base phys address of kernel - page align @@ -121,9 +129,13 @@ void __init setup_memory(void) * for 4GB of memory, using 4kB pages), plus 1 page * (in case the address isn't page-aligned). */ +#ifndef CONFIG_MMU map_size = init_bootmem_node(NODE_DATA(0), PFN_UP(TOPHYS((u32)_end)), min_low_pfn, max_low_pfn); - +#else + map_size = init_bootmem_node(&contig_page_data, + PFN_UP(TOPHYS((u32)_end)), min_low_pfn, max_low_pfn); +#endif lmb_reserve(PFN_UP(TOPHYS((u32)_end)) << PAGE_SHIFT, map_size); /* free bootmem is whole main memory */ @@ -137,6 +149,9 @@ void __init setup_memory(void) reserve_bootmem(lmb.reserved.region[i].base, lmb_size_bytes(&lmb.reserved, i) - 1, BOOTMEM_DEFAULT); } +#ifdef CONFIG_MMU + init_bootmem_done = 1; +#endif paging_init(); } @@ -191,11 +206,145 @@ void __init mem_init(void) printk(KERN_INFO "Memory: %luk/%luk available\n", (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), num_physpages << (PAGE_SHIFT-10)); +#ifdef CONFIG_MMU + mem_init_done = 1; +#endif } +#ifndef CONFIG_MMU /* Check against bounds of physical memory */ int ___range_ok(unsigned long addr, unsigned long size) { return ((addr < memory_start) || ((addr + size) > memory_end)); } +EXPORT_SYMBOL(___range_ok); + +#else +int page_is_ram(unsigned long pfn) +{ + return pfn < max_low_pfn; +} + +/* + * Check for command-line options that affect what MMU_init will do. + */ +static void mm_cmdline_setup(void) +{ + unsigned long maxmem = 0; + char *p = cmd_line; + + /* Look for mem= option on command line */ + p = strstr(cmd_line, "mem="); + if (p) { + p += 4; + maxmem = memparse(p, &p); + if (maxmem && memory_size > maxmem) { + memory_size = maxmem; + memory_end = memory_start + memory_size; + lmb.memory.region[0].size = memory_size; + } + } +} + +/* + * MMU_init_hw does the chip-specific initialization of the MMU hardware. + */ +static void __init mmu_init_hw(void) +{ + /* + * The Zone Protection Register (ZPR) defines how protection will + * be applied to every page which is a member of a given zone. At + * present, we utilize only two of the zones. + * The zone index bits (of ZSEL) in the PTE are used for software + * indicators, except the LSB. For user access, zone 1 is used, + * for kernel access, zone 0 is used. We set all but zone 1 + * to zero, allowing only kernel access as indicated in the PTE. + * For zone 1, we set a 01 binary (a value of 10 will not work) + * to allow user access as indicated in the PTE. This also allows + * kernel access as indicated in the PTE. + */ + __asm__ __volatile__ ("ori r11, r0, 0x10000000;" \ + "mts rzpr, r11;" + : : : "r11"); +} + +/* + * MMU_init sets up the basic memory mappings for the kernel, + * including both RAM and possibly some I/O regions, + * and sets up the page tables and the MMU hardware ready to go. + */ + +/* called from head.S */ +asmlinkage void __init mmu_init(void) +{ + unsigned int kstart, ksize; + + if (!lmb.reserved.cnt) { + printk(KERN_EMERG "Error memory count\n"); + machine_restart(NULL); + } + + if ((u32) lmb.memory.region[0].size < 0x1000000) { + printk(KERN_EMERG "Memory must be greater than 16MB\n"); + machine_restart(NULL); + } + /* Find main memory where the kernel is */ + memory_start = (u32) lmb.memory.region[0].base; + memory_end = (u32) lmb.memory.region[0].base + + (u32) lmb.memory.region[0].size; + memory_size = memory_end - memory_start; + + mm_cmdline_setup(); /* FIXME parse args from command line - not used */ + + /* + * Map out the kernel text/data/bss from the available physical + * memory. + */ + kstart = __pa(CONFIG_KERNEL_START); /* kernel start */ + /* kernel size */ + ksize = PAGE_ALIGN(((u32)_end - (u32)CONFIG_KERNEL_START)); + lmb_reserve(kstart, ksize); + +#if defined(CONFIG_BLK_DEV_INITRD) + /* Remove the init RAM disk from the available memory. */ +/* if (initrd_start) { + mem_pieces_remove(&phys_avail, __pa(initrd_start), + initrd_end - initrd_start, 1); + }*/ +#endif /* CONFIG_BLK_DEV_INITRD */ + + /* Initialize the MMU hardware */ + mmu_init_hw(); + + /* Map in all of RAM starting at CONFIG_KERNEL_START */ + mapin_ram(); + +#ifdef HIGHMEM_START_BOOL + ioremap_base = HIGHMEM_START; +#else + ioremap_base = 0xfe000000UL; /* for now, could be 0xfffff000 */ +#endif /* CONFIG_HIGHMEM */ + ioremap_bot = ioremap_base; + + /* Initialize the context management stuff */ + mmu_context_init(); +} + +/* This is only called until mem_init is done. */ +void __init *early_get_page(void) +{ + void *p; + if (init_bootmem_done) { + p = alloc_bootmem_pages(PAGE_SIZE); + } else { + /* + * Mem start + 32MB -> here is limit + * because of mem mapping from head.S + */ + p = __va(lmb_alloc_base(PAGE_SIZE, PAGE_SIZE, + memory_start + 0x2000000)); + } + return p; +} +#endif /* CONFIG_MMU */ diff --git a/arch/microblaze/mm/mmu_context.c b/arch/microblaze/mm/mmu_context.c new file mode 100644 index 000000000000..26ff82f4fa8f --- /dev/null +++ b/arch/microblaze/mm/mmu_context.c @@ -0,0 +1,70 @@ +/* + * This file contains the routines for handling the MMU. + * + * Copyright (C) 2007 Xilinx, Inc. All rights reserved. + * + * Derived from arch/ppc/mm/4xx_mmu.c: + * -- paulus + * + * Derived from arch/ppc/mm/init.c: + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * + * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au) + * and Cort Dougan (PReP) (cort@cs.nmt.edu) + * Copyright (C) 1996 Paul Mackerras + * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk). + * + * Derived from "arch/i386/mm/init.c" + * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#include <linux/mm.h> +#include <linux/init.h> + +#include <asm/tlbflush.h> +#include <asm/mmu_context.h> + +mm_context_t next_mmu_context; +unsigned long context_map[LAST_CONTEXT / BITS_PER_LONG + 1]; +atomic_t nr_free_contexts; +struct mm_struct *context_mm[LAST_CONTEXT+1]; + +/* + * Initialize the context management stuff. + */ +void __init mmu_context_init(void) +{ + /* + * The use of context zero is reserved for the kernel. + * This code assumes FIRST_CONTEXT < 32. + */ + context_map[0] = (1 << FIRST_CONTEXT) - 1; + next_mmu_context = FIRST_CONTEXT; + atomic_set(&nr_free_contexts, LAST_CONTEXT - FIRST_CONTEXT + 1); +} + +/* + * Steal a context from a task that has one at the moment. + * + * This isn't an LRU system, it just frees up each context in + * turn (sort-of pseudo-random replacement :). This would be the + * place to implement an LRU scheme if anyone were motivated to do it. + */ +void steal_context(void) +{ + struct mm_struct *mm; + + /* free up context `next_mmu_context' */ + /* if we shouldn't free context 0, don't... */ + if (next_mmu_context < FIRST_CONTEXT) + next_mmu_context = FIRST_CONTEXT; + mm = context_mm[next_mmu_context]; + flush_tlb_mm(mm); + destroy_context(mm); +} diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c new file mode 100644 index 000000000000..46c4ca5d15c5 --- /dev/null +++ b/arch/microblaze/mm/pgtable.c @@ -0,0 +1,286 @@ +/* + * This file contains the routines setting up the linux page tables. + * + * Copyright (C) 2008 Michal Simek + * Copyright (C) 2008 PetaLogix + * + * Copyright (C) 2007 Xilinx, Inc. All rights reserved. + * + * Derived from arch/ppc/mm/pgtable.c: + * -- paulus + * + * Derived from arch/ppc/mm/init.c: + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * + * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au) + * and Cort Dougan (PReP) (cort@cs.nmt.edu) + * Copyright (C) 1996 Paul Mackerras + * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk). + * + * Derived from "arch/i386/mm/init.c" + * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/vmalloc.h> +#include <linux/init.h> + +#include <asm/pgtable.h> +#include <asm/pgalloc.h> +#include <linux/io.h> +#include <asm/mmu.h> +#include <asm/sections.h> + +#define flush_HPTE(X, va, pg) _tlbie(va) + +unsigned long ioremap_base; +unsigned long ioremap_bot; + +/* The maximum lowmem defaults to 768Mb, but this can be configured to + * another value. + */ +#define MAX_LOW_MEM CONFIG_LOWMEM_SIZE + +#ifndef CONFIG_SMP +struct pgtable_cache_struct quicklists; +#endif + +static void __iomem *__ioremap(phys_addr_t addr, unsigned long size, + unsigned long flags) +{ + unsigned long v, i; + phys_addr_t p; + int err; + + /* + * Choose an address to map it to. + * Once the vmalloc system is running, we use it. + * Before then, we use space going down from ioremap_base + * (ioremap_bot records where we're up to). + */ + p = addr & PAGE_MASK; + size = PAGE_ALIGN(addr + size) - p; + + /* + * Don't allow anybody to remap normal RAM that we're using. + * mem_init() sets high_memory so only do the check after that. + * + * However, allow remap of rootfs: TBD + */ + if (mem_init_done && + p >= memory_start && p < virt_to_phys(high_memory) && + !(p >= virt_to_phys((unsigned long)&__bss_stop) && + p < virt_to_phys((unsigned long)__bss_stop))) { + printk(KERN_WARNING "__ioremap(): phys addr "PTE_FMT + " is RAM lr %p\n", (unsigned long)p, + __builtin_return_address(0)); + return NULL; + } + + if (size == 0) + return NULL; + + /* + * Is it already mapped? If the whole area is mapped then we're + * done, otherwise remap it since we want to keep the virt addrs for + * each request contiguous. + * + * We make the assumption here that if the bottom and top + * of the range we want are mapped then it's mapped to the + * same virt address (and this is contiguous). + * -- Cort + */ + + if (mem_init_done) { + struct vm_struct *area; + area = get_vm_area(size, VM_IOREMAP); + if (area == NULL) + return NULL; + v = VMALLOC_VMADDR(area->addr); + } else { + v = (ioremap_bot -= size); + } + + if ((flags & _PAGE_PRESENT) == 0) + flags |= _PAGE_KERNEL; + if (flags & _PAGE_NO_CACHE) + flags |= _PAGE_GUARDED; + + err = 0; + for (i = 0; i < size && err == 0; i += PAGE_SIZE) + err = map_page(v + i, p + i, flags); + if (err) { + if (mem_init_done) + vfree((void *)v); + return NULL; + } + + return (void __iomem *) (v + ((unsigned long)addr & ~PAGE_MASK)); +} + +void __iomem *ioremap(phys_addr_t addr, unsigned long size) +{ + return __ioremap(addr, size, _PAGE_NO_CACHE); +} +EXPORT_SYMBOL(ioremap); + +void iounmap(void *addr) +{ + if (addr > high_memory && (unsigned long) addr < ioremap_bot) + vfree((void *) (PAGE_MASK & (unsigned long) addr)); +} +EXPORT_SYMBOL(iounmap); + + +int map_page(unsigned long va, phys_addr_t pa, int flags) +{ + pmd_t *pd; + pte_t *pg; + int err = -ENOMEM; + /* spin_lock(&init_mm.page_table_lock); */ + /* Use upper 10 bits of VA to index the first level map */ + pd = pmd_offset(pgd_offset_k(va), va); + /* Use middle 10 bits of VA to index the second-level map */ + pg = pte_alloc_kernel(pd, va); /* from powerpc - pgtable.c */ + /* pg = pte_alloc_kernel(&init_mm, pd, va); */ + + if (pg != NULL) { + err = 0; + set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT, + __pgprot(flags))); + if (mem_init_done) + flush_HPTE(0, va, pmd_val(*pd)); + /* flush_HPTE(0, va, pg); */ + + } + /* spin_unlock(&init_mm.page_table_lock); */ + return err; +} + +void __init adjust_total_lowmem(void) +{ +/* TBD */ +#if 0 + unsigned long max_low_mem = MAX_LOW_MEM; + + if (total_lowmem > max_low_mem) { + total_lowmem = max_low_mem; +#ifndef CONFIG_HIGHMEM + printk(KERN_INFO "Warning, memory limited to %ld Mb, use " + "CONFIG_HIGHMEM to reach %ld Mb\n", + max_low_mem >> 20, total_memory >> 20); + total_memory = total_lowmem; +#endif /* CONFIG_HIGHMEM */ + } +#endif +} + +static void show_tmem(unsigned long tmem) +{ + volatile unsigned long a; + a = a + tmem; +} + +/* + * Map in all of physical memory starting at CONFIG_KERNEL_START. + */ +void __init mapin_ram(void) +{ + unsigned long v, p, s, f; + + v = CONFIG_KERNEL_START; + p = memory_start; + show_tmem(memory_size); + for (s = 0; s < memory_size; s += PAGE_SIZE) { + f = _PAGE_PRESENT | _PAGE_ACCESSED | + _PAGE_SHARED | _PAGE_HWEXEC; + if ((char *) v < _stext || (char *) v >= _etext) + f |= _PAGE_WRENABLE; + else + /* On the MicroBlaze, no user access + forces R/W kernel access */ + f |= _PAGE_USER; + map_page(v, p, f); + v += PAGE_SIZE; + p += PAGE_SIZE; + } +} + +/* is x a power of 2? */ +#define is_power_of_2(x) ((x) != 0 && (((x) & ((x) - 1)) == 0)) + +/* + * Set up a mapping for a block of I/O. + * virt, phys, size must all be page-aligned. + * This should only be called before ioremap is called. + */ +void __init io_block_mapping(unsigned long virt, phys_addr_t phys, + unsigned int size, int flags) +{ + int i; + + if (virt > CONFIG_KERNEL_START && virt < ioremap_bot) + ioremap_bot = ioremap_base = virt; + + /* Put it in the page tables. */ + for (i = 0; i < size; i += PAGE_SIZE) + map_page(virt + i, phys + i, flags); +} + +/* Scan the real Linux page tables and return a PTE pointer for + * a virtual address in a context. + * Returns true (1) if PTE was found, zero otherwise. The pointer to + * the PTE pointer is unmodified if PTE is not found. + */ +static int get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep) +{ + pgd_t *pgd; + pmd_t *pmd; + pte_t *pte; + int retval = 0; + + pgd = pgd_offset(mm, addr & PAGE_MASK); + if (pgd) { + pmd = pmd_offset(pgd, addr & PAGE_MASK); + if (pmd_present(*pmd)) { + pte = pte_offset_kernel(pmd, addr & PAGE_MASK); + if (pte) { + retval = 1; + *ptep = pte; + } + } + } + return retval; +} + +/* Find physical address for this virtual address. Normally used by + * I/O functions, but anyone can call it. + */ +unsigned long iopa(unsigned long addr) +{ + unsigned long pa; + + pte_t *pte; + struct mm_struct *mm; + + /* Allow mapping of user addresses (within the thread) + * for DMA if necessary. + */ + if (addr < TASK_SIZE) + mm = current->mm; + else + mm = &init_mm; + + pa = 0; + if (get_pteptr(mm, addr, &pte)) + pa = (pte_val(*pte) & PAGE_MASK) | (addr & ~PAGE_MASK); + + return pa; +} |