diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/cavium-octeon/Kconfig | 85 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/Makefile | 16 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/csrc-octeon.c | 58 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/dma-octeon.c | 32 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/flash_setup.c | 84 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/octeon-irq.c | 497 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/octeon-memcpy.S | 521 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/serial.c | 136 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/setup.c | 929 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/smp.c | 211 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h | 78 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h | 64 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-cavium-octeon/irq.h | 244 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h | 131 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-cavium-octeon/war.h | 26 | ||||
| -rw-r--r-- | arch/mips/include/asm/octeon/octeon.h | 248 | ||||
| -rw-r--r-- | arch/mips/kernel/octeon_switch.S | 506 | ||||
| -rw-r--r-- | arch/mips/mm/c-octeon.c | 307 | ||||
| -rw-r--r-- | arch/mips/mm/cex-oct.S | 70 |
19 files changed, 4243 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig new file mode 100644 index 000000000000..094c17e38e16 --- /dev/null +++ b/arch/mips/cavium-octeon/Kconfig @@ -0,0 +1,85 @@ +config CAVIUM_OCTEON_SPECIFIC_OPTIONS + bool "Enable Octeon specific options" + depends on CPU_CAVIUM_OCTEON + default "y" + +config CAVIUM_OCTEON_2ND_KERNEL + bool "Build the kernel to be used as a 2nd kernel on the same chip" + depends on CAVIUM_OCTEON_SPECIFIC_OPTIONS + default "n" + help + This option configures this kernel to be linked at a different + address and use the 2nd uart for output. This allows a kernel built + with this option to be run at the same time as one built without this + option. + +config CAVIUM_OCTEON_HW_FIX_UNALIGNED + bool "Enable hardware fixups of unaligned loads and stores" + depends on CAVIUM_OCTEON_SPECIFIC_OPTIONS + default "y" + help + Configure the Octeon hardware to automatically fix unaligned loads + and stores. Normally unaligned accesses are fixed using a kernel + exception handler. This option enables the hardware automatic fixups, + which requires only an extra 3 cycles. Disable this option if you + are running code that relies on address exceptions on unaligned + accesses. + +config CAVIUM_OCTEON_CVMSEG_SIZE + int "Number of L1 cache lines reserved for CVMSEG memory" + depends on CAVIUM_OCTEON_SPECIFIC_OPTIONS + range 0 54 + default 1 + help + CVMSEG LM is a segment that accesses portions of the dcache as a + local memory; the larger CVMSEG is, the smaller the cache is. + This selects the size of CVMSEG LM, which is in cache blocks. The + legally range is from zero to 54 cache blocks (i.e. CVMSEG LM is + between zero and 6192 bytes). + +config CAVIUM_OCTEON_LOCK_L2 + bool "Lock often used kernel code in the L2" + depends on CAVIUM_OCTEON_SPECIFIC_OPTIONS + default "y" + help + Enable locking parts of the kernel into the L2 cache. + +config CAVIUM_OCTEON_LOCK_L2_TLB + bool "Lock the TLB handler in L2" + depends on CAVIUM_OCTEON_LOCK_L2 + default "y" + help + Lock the low level TLB fast path into L2. + +config CAVIUM_OCTEON_LOCK_L2_EXCEPTION + bool "Lock the exception handler in L2" + depends on CAVIUM_OCTEON_LOCK_L2 + default "y" + help + Lock the low level exception handler into L2. + +config CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT + bool "Lock the interrupt handler in L2" + depends on CAVIUM_OCTEON_LOCK_L2 + default "y" + help + Lock the low level interrupt handler into L2. + +config CAVIUM_OCTEON_LOCK_L2_INTERRUPT + bool "Lock the 2nd level interrupt handler in L2" + depends on CAVIUM_OCTEON_LOCK_L2 + default "y" + help + Lock the 2nd level interrupt handler in L2. + +config CAVIUM_OCTEON_LOCK_L2_MEMCPY + bool "Lock memcpy() in L2" + depends on CAVIUM_OCTEON_LOCK_L2 + default "y" + help + Lock the kernel's implementation of memcpy() into L2. + +config ARCH_SPARSEMEM_ENABLE + def_bool y + select SPARSEMEM_STATIC + depends on CPU_CAVIUM_OCTEON diff --git a/arch/mips/cavium-octeon/Makefile b/arch/mips/cavium-octeon/Makefile new file mode 100644 index 000000000000..1c2a7faf5881 --- /dev/null +++ b/arch/mips/cavium-octeon/Makefile @@ -0,0 +1,16 @@ +# +# Makefile for the Cavium Octeon specific kernel interface routines +# under Linux. +# +# 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. +# +# Copyright (C) 2005-2008 Cavium Networks +# + +obj-y := setup.o serial.o octeon-irq.o csrc-octeon.o +obj-y += dma-octeon.o flash_setup.o +obj-y += octeon-memcpy.o + +obj-$(CONFIG_SMP) += smp.o diff --git a/arch/mips/cavium-octeon/csrc-octeon.c b/arch/mips/cavium-octeon/csrc-octeon.c new file mode 100644 index 000000000000..70fd92c31657 --- /dev/null +++ b/arch/mips/cavium-octeon/csrc-octeon.c @@ -0,0 +1,58 @@ +/* + * 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. + * + * Copyright (C) 2007 by Ralf Baechle + */ +#include <linux/clocksource.h> +#include <linux/init.h> + +#include <asm/time.h> + +#include <asm/octeon/octeon.h> +#include <asm/octeon/cvmx-ipd-defs.h> + +/* + * Set the current core's cvmcount counter to the value of the + * IPD_CLK_COUNT. We do this on all cores as they are brought + * on-line. This allows for a read from a local cpu register to + * access a synchronized counter. + * + */ +void octeon_init_cvmcount(void) +{ + unsigned long flags; + unsigned loops = 2; + + /* Clobber loops so GCC will not unroll the following while loop. */ + asm("" : "+r" (loops)); + + local_irq_save(flags); + /* + * Loop several times so we are executing from the cache, + * which should give more deterministic timing. + */ + while (loops--) + write_c0_cvmcount(cvmx_read_csr(CVMX_IPD_CLK_COUNT)); + local_irq_restore(flags); +} + +static cycle_t octeon_cvmcount_read(void) +{ + return read_c0_cvmcount(); +} + +static struct clocksource clocksource_mips = { + .name = "OCTEON_CVMCOUNT", + .read = octeon_cvmcount_read, + .mask = CLOCKSOURCE_MASK(64), + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +void __init plat_time_init(void) +{ + clocksource_mips.rating = 300; + clocksource_set_clock(&clocksource_mips, mips_hpt_frequency); + clocksource_register(&clocksource_mips); +} diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c new file mode 100644 index 000000000000..01b1ef94b361 --- /dev/null +++ b/arch/mips/cavium-octeon/dma-octeon.c @@ -0,0 +1,32 @@ +/* + * 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. + * + * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com> + * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org> + * Copyright (C) 2005 Ilya A. Volynets-Evenbakh <ilya@total-knowledge.com> + * swiped from i386, and cloned for MIPS by Geert, polished by Ralf. + * IP32 changes by Ilya. + * Cavium Networks: Create new dma setup for Cavium Networks Octeon based on + * the kernels original. + */ +#include <linux/types.h> +#include <linux/mm.h> + +#include <dma-coherence.h> + +dma_addr_t octeon_map_dma_mem(struct device *dev, void *ptr, size_t size) +{ + /* Without PCI/PCIe this function can be called for Octeon internal + devices such as USB. These devices all support 64bit addressing */ + mb(); + return virt_to_phys(ptr); +} + +void octeon_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr) +{ + /* Without PCI/PCIe this function can be called for Octeon internal + * devices such as USB. These devices all support 64bit addressing */ + return; +} diff --git a/arch/mips/cavium-octeon/flash_setup.c b/arch/mips/cavium-octeon/flash_setup.c new file mode 100644 index 000000000000..553d36cbcc42 --- /dev/null +++ b/arch/mips/cavium-octeon/flash_setup.c @@ -0,0 +1,84 @@ +/* + * Octeon Bootbus flash setup + * + * 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. + * + * Copyright (C) 2007, 2008 Cavium Networks + */ +#include <linux/kernel.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/octeon/octeon.h> + +static struct map_info flash_map; +static struct mtd_info *mymtd; +#ifdef CONFIG_MTD_PARTITIONS +static int nr_parts; +static struct mtd_partition *parts; +static const char *part_probe_types[] = { + "cmdlinepart", +#ifdef CONFIG_MTD_REDBOOT_PARTS + "RedBoot", +#endif + NULL +}; +#endif + +/** + * Module/ driver initialization. + * + * Returns Zero on success + */ +static int __init flash_init(void) +{ + /* + * Read the bootbus region 0 setup to determine the base + * address of the flash. + */ + union cvmx_mio_boot_reg_cfgx region_cfg; + region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(0)); + if (region_cfg.s.en) { + /* + * The bootloader always takes the flash and sets its + * address so the entire flash fits below + * 0x1fc00000. This way the flash aliases to + * 0x1fc00000 for booting. Software can access the + * full flash at the true address, while core boot can + * access 4MB. + */ + /* Use this name so old part lines work */ + flash_map.name = "phys_mapped_flash"; + flash_map.phys = region_cfg.s.base << 16; + flash_map.size = 0x1fc00000 - flash_map.phys; + flash_map.bankwidth = 1; + flash_map.virt = ioremap(flash_map.phys, flash_map.size); + pr_notice("Bootbus flash: Setting flash for %luMB flash at " + "0x%08lx\n", flash_map.size >> 20, flash_map.phys); + simple_map_init(&flash_map); + mymtd = do_map_probe("cfi_probe", &flash_map); + if (mymtd) { + mymtd->owner = THIS_MODULE; + +#ifdef CONFIG_MTD_PARTITIONS + nr_parts = parse_mtd_partitions(mymtd, + part_probe_types, + &parts, 0); + if (nr_parts > 0) + add_mtd_partitions(mymtd, parts, nr_parts); + else + add_mtd_device(mymtd); +#else + add_mtd_device(mymtd); +#endif + } else { + pr_err("Failed to register MTD device for flash\n"); + } + } + return 0; +} + +late_initcall(flash_init); diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c new file mode 100644 index 000000000000..fc72984a5dae --- /dev/null +++ b/arch/mips/cavium-octeon/octeon-irq.c @@ -0,0 +1,497 @@ +/* + * 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. + * + * Copyright (C) 2004-2008 Cavium Networks + */ +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/hardirq.h> + +#include <asm/octeon/octeon.h> + +DEFINE_RWLOCK(octeon_irq_ciu0_rwlock); +DEFINE_RWLOCK(octeon_irq_ciu1_rwlock); +DEFINE_SPINLOCK(octeon_irq_msi_lock); + +static void octeon_irq_core_ack(unsigned int irq) +{ + unsigned int bit = irq - OCTEON_IRQ_SW0; + /* + * We don't need to disable IRQs to make these atomic since + * they are already disabled earlier in the low level + * interrupt code. + */ + clear_c0_status(0x100 << bit); + /* The two user interrupts must be cleared manually. */ + if (bit < 2) + clear_c0_cause(0x100 << bit); +} + +static void octeon_irq_core_eoi(unsigned int irq) +{ + irq_desc_t *desc = irq_desc + irq; + unsigned int bit = irq - OCTEON_IRQ_SW0; + /* + * If an IRQ is being processed while we are disabling it the + * handler will attempt to unmask the interrupt after it has + * been disabled. + */ + if (desc->status & IRQ_DISABLED) + return; + + /* There is a race here. We should fix it. */ + + /* + * We don't need to disable IRQs to make these atomic since + * they are already disabled earlier in the low level + * interrupt code. + */ + set_c0_status(0x100 << bit); +} + +static void octeon_irq_core_enable(unsigned int irq) +{ + unsigned long flags; + unsigned int bit = irq - OCTEON_IRQ_SW0; + + /* + * We need to disable interrupts to make sure our updates are + * atomic. + */ + local_irq_save(flags); + set_c0_status(0x100 << bit); + local_irq_restore(flags); +} + +static void octeon_irq_core_disable_local(unsigned int irq) +{ + unsigned long flags; + unsigned int bit = irq - OCTEON_IRQ_SW0; + /* + * We need to disable interrupts to make sure our updates are + * atomic. + */ + local_irq_save(flags); + clear_c0_status(0x100 << bit); + local_irq_restore(flags); +} + +static void octeon_irq_core_disable(unsigned int irq) +{ +#ifdef CONFIG_SMP + on_each_cpu((void (*)(void *)) octeon_irq_core_disable_local, + (void *) (long) irq, 1); +#else + octeon_irq_core_disable_local(irq); +#endif +} + +static struct irq_chip octeon_irq_chip_core = { + .name = "Core", + .enable = octeon_irq_core_enable, + .disable = octeon_irq_core_disable, + .ack = octeon_irq_core_ack, + .eoi = octeon_irq_core_eoi, +}; + + +static void octeon_irq_ciu0_ack(unsigned int irq) +{ + /* + * In order to avoid any locking accessing the CIU, we + * acknowledge CIU interrupts by disabling all of them. This + * way we can use a per core register and avoid any out of + * core locking requirements. This has the side affect that + * CIU interrupts can't be processed recursively. + * + * We don't need to disable IRQs to make these atomic since + * they are already disabled earlier in the low level + * interrupt code. + */ + clear_c0_status(0x100 << 2); +} + +static void octeon_irq_ciu0_eoi(unsigned int irq) +{ + /* + * Enable all CIU interrupts again. We don't need to disable + * IRQs to make these atomic since they are already disabled + * earlier in the low level interrupt code. + */ + set_c0_status(0x100 << 2); +} + +static void octeon_irq_ciu0_enable(unsigned int irq) +{ + int coreid = cvmx_get_core_num(); + unsigned long flags; + uint64_t en0; + int bit = irq - OCTEON_IRQ_WORKQ0; /* Bit 0-63 of EN0 */ + + /* + * A read lock is used here to make sure only one core is ever + * updating the CIU enable bits at a time. During an enable + * the cores don't interfere with each other. During a disable + * the write lock stops any enables that might cause a + * problem. + */ + read_lock_irqsave(&octeon_irq_ciu0_rwlock, flags); + en0 = cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)); + en0 |= 1ull << bit; + cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), en0); + cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)); + read_unlock_irqrestore(&octeon_irq_ciu0_rwlock, flags); +} + +static void octeon_irq_ciu0_disable(unsigned int irq) +{ + int bit = irq - OCTEON_IRQ_WORKQ0; /* Bit 0-63 of EN0 */ + unsigned long flags; + uint64_t en0; +#ifdef CONFIG_SMP + int cpu; + write_lock_irqsave(&octeon_irq_ciu0_rwlock, flags); + for_each_online_cpu(cpu) { + int coreid = cpu_logical_map(cpu); + en0 = cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)); + en0 &= ~(1ull << bit); + cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), en0); + } + /* + * We need to do a read after the last update to make sure all + * of them are done. + */ + cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2)); + write_unlock_irqrestore(&octeon_irq_ciu0_rwlock, flags); +#else + int coreid = cvmx_get_core_num(); + local_irq_save(flags); + en0 = cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)); + en0 &= ~(1ull << bit); + cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), en0); + cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)); + local_irq_restore(flags); +#endif +} + +#ifdef CONFIG_SMP +static void octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask *dest) +{ + int cpu; + int bit = irq - OCTEON_IRQ_WORKQ0; /* Bit 0-63 of EN0 */ + + write_lock(&octeon_irq_ciu0_rwlock); + for_each_online_cpu(cpu) { + int coreid = cpu_logical_map(cpu); + uint64_t en0 = + cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)); + if (cpumask_test_cpu(cpu, dest)) + en0 |= 1ull << bit; + else + en0 &= ~(1ull << bit); + cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), en0); + } + /* + * We need to do a read after the last update to make sure all + * of them are done. + */ + cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2)); + write_unlock(&octeon_irq_ciu0_rwlock); +} +#endif + +static struct irq_chip octeon_irq_chip_ciu0 = { + .name = "CIU0", + .enable = octeon_irq_ciu0_enable, + .disable = octeon_irq_ciu0_disable, + .ack = octeon_irq_ciu0_ack, + .eoi = octeon_irq_ciu0_eoi, +#ifdef CONFIG_SMP + .set_affinity = octeon_irq_ciu0_set_affinity, +#endif +}; + + +static void octeon_irq_ciu1_ack(unsigned int irq) +{ + /* + * In order to avoid any locking accessing the CIU, we + * acknowledge CIU interrupts by disabling all of them. This + * way we can use a per core register and avoid any out of + * core locking requirements. This has the side affect that + * CIU interrupts can't be processed recursively. We don't + * need to disable IRQs to make these atomic since they are + * already disabled earlier in the low level interrupt code. + */ + clear_c0_status(0x100 << 3); +} + +static void octeon_irq_ciu1_eoi(unsigned int irq) +{ + /* + * Enable all CIU interrupts again. We don't need to disable + * IRQs to make these atomic since they are already disabled + * earlier in the low level interrupt code. + */ + set_c0_status(0x100 << 3); +} + +static void octeon_irq_ciu1_enable(unsigned int irq) +{ + int coreid = cvmx_get_core_num(); + unsigned long flags; + uint64_t en1; + int bit = irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */ + + /* + * A read lock is used here to make sure only one core is ever + * updating the CIU enable bits at a time. During an enable + * the cores don't interfere with each other. During a disable + * the write lock stops any enables that might cause a + * problem. + */ + read_lock_irqsave(&octeon_irq_ciu1_rwlock, flags); + en1 = cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1)); + en1 |= 1ull << bit; + cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), en1); + cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1)); + read_unlock_irqrestore(&octeon_irq_ciu1_rwlock, flags); +} + +static void octeon_irq_ciu1_disable(unsigned int irq) +{ + int bit = irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */ + unsigned long flags; + uint64_t en1; +#ifdef CONFIG_SMP + int cpu; + write_lock_irqsave(&octeon_irq_ciu1_rwlock, flags); + for_each_online_cpu(cpu) { + int coreid = cpu_logical_map(cpu); + en1 = cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1)); + en1 &= ~(1ull << bit); + cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), en1); + } + /* + * We need to do a read after the last update to make sure all + * of them are done. + */ + cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1)); + write_unlock_irqrestore(&octeon_irq_ciu1_rwlock, flags); +#else + int coreid = cvmx_get_core_num(); + local_irq_save(flags); + en1 = cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1)); + en1 &= ~(1ull << bit); + cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), en1); + cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1)); + local_irq_restore(flags); +#endif +} + +#ifdef CONFIG_SMP +static void octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask *dest) +{ + int cpu; + int bit = irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */ + + write_lock(&octeon_irq_ciu1_rwlock); + for_each_online_cpu(cpu) { + int coreid = cpu_logical_map(cpu); + uint64_t en1 = + cvmx_read_csr(CVMX_CIU_INTX_EN1 + (coreid * 2 + 1)); + if (cpumask_test_cpu(cpu, dest)) + en1 |= 1ull << bit; + else + en1 &= ~(1ull << bit); + cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), en1); + } + /* + * We need to do a read after the last update to make sure all + * of them are done. + */ + cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1)); + write_unlock(&octeon_irq_ciu1_rwlock); +} +#endif + +static struct irq_chip octeon_irq_chip_ciu1 = { + .name = "CIU1", + .enable = octeon_irq_ciu1_enable, + .disable = octeon_irq_ciu1_disable, + .ack = octeon_irq_ciu1_ack, + .eoi = octeon_irq_ciu1_eoi, +#ifdef CONFIG_SMP + .set_affinity = octeon_irq_ciu1_set_affinity, +#endif +}; + +#ifdef CONFIG_PCI_MSI + +static void octeon_irq_msi_ack(unsigned int irq) +{ + if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) { + /* These chips have PCI */ + cvmx_write_csr(CVMX_NPI_NPI_MSI_RCV, + 1ull << (irq - OCTEON_IRQ_MSI_BIT0)); + } else { + /* + * These chips have PCIe. Thankfully the ACK doesn't + * need any locking. + */ + cvmx_write_csr(CVMX_PEXP_NPEI_MSI_RCV0, + 1ull << (irq - OCTEON_IRQ_MSI_BIT0)); + } +} + +static void octeon_irq_msi_eoi(unsigned int irq) +{ + /* Nothing needed */ +} + +static void octeon_irq_msi_enable(unsigned int irq) +{ + if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) { + /* + * Octeon PCI doesn't have the ability to mask/unmask + * MSI interrupts individually. Instead of + * masking/unmasking them in groups of 16, we simple + * assume MSI devices are well behaved. MSI + * interrupts are always enable and the ACK is assumed + * to be enough. + */ + } else { + /* These chips have PCIe. Note that we only support + * the first 64 MSI interrupts. Unfortunately all the + * MSI enables are in the same register. We use + * MSI0's lock to control access to them all. + */ + uint64_t en; + unsigned long flags; + spin_lock_irqsave(&octeon_irq_msi_lock, flags); + en = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); + en |= 1ull << (irq - OCTEON_IRQ_MSI_BIT0); + cvmx_write_csr(CVMX_PEXP_NPEI_MSI_ENB0, en); + cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); + spin_unlock_irqrestore(&octeon_irq_msi_lock, flags); + } +} + +static void octeon_irq_msi_disable(unsigned int irq) +{ + if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) { + /* See comment in enable */ + } else { + /* + * These chips have PCIe. Note that we only support + * the first 64 MSI interrupts. Unfortunately all the + * MSI enables are in the same register. We use + * MSI0's lock to control access to them all. + */ + uint64_t en; + unsigned long flags; + spin_lock_irqsave(&octeon_irq_msi_lock, flags); + en = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); + en &= ~(1ull << (irq - OCTEON_IRQ_MSI_BIT0)); + cvmx_write_csr(CVMX_PEXP_NPEI_MSI_ENB0, en); + cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); + spin_unlock_irqrestore(&octeon_irq_msi_lock, flags); + } +} + +static struct irq_chip octeon_irq_chip_msi = { + .name = "MSI", + .enable = octeon_irq_msi_enable, + .disable = octeon_irq_msi_disable, + .ack = octeon_irq_msi_ack, + .eoi = octeon_irq_msi_eoi, +}; +#endif + +void __init arch_init_irq(void) +{ + int irq; + +#ifdef CONFIG_SMP + /* Set the default affinity to the boot cpu. */ + cpumask_clear(irq_default_affinity); + cpumask_set_cpu(smp_processor_id(), irq_default_affinity); +#endif + + if (NR_IRQS < OCTEON_IRQ_LAST) + pr_err("octeon_irq_init: NR_IRQS is set too low\n"); + + /* 0 - 15 reserved for i8259 master and slave controller. */ + + /* 17 - 23 Mips internal */ + for (irq = OCTEON_IRQ_SW0; irq <= OCTEON_IRQ_TIMER; irq++) { + set_irq_chip_and_handler(irq, &octeon_irq_chip_core, + handle_percpu_irq); + } + + /* 24 - 87 CIU_INT_SUM0 */ + for (irq = OCTEON_IRQ_WORKQ0; irq <= OCTEON_IRQ_BOOTDMA; irq++) { + set_irq_chip_and_handler(irq, &octeon_irq_chip_ciu0, + handle_percpu_irq); + } + + /* 88 - 151 CIU_INT_SUM1 */ + for (irq = OCTEON_IRQ_WDOG0; irq <= OCTEON_IRQ_RESERVED151; irq++) { + set_irq_chip_and_handler(irq, &octeon_irq_chip_ciu1, + handle_percpu_irq); + } + +#ifdef CONFIG_PCI_MSI + /* 152 - 215 PCI/PCIe MSI interrupts */ + for (irq = OCTEON_IRQ_MSI_BIT0; irq <= OCTEON_IRQ_MSI_BIT63; irq++) { + set_irq_chip_and_handler(irq, &octeon_irq_chip_msi, + handle_percpu_irq); + } +#endif + set_c0_status(0x300 << 2); +} + +asmlinkage void plat_irq_dispatch(void) +{ + const unsigned long core_id = cvmx_get_core_num(); + const uint64_t ciu_sum0_address = CVMX_CIU_INTX_SUM0(core_id * 2); + const uint64_t ciu_en0_address = CVMX_CIU_INTX_EN0(core_id * 2); + const uint64_t ciu_sum1_address = CVMX_CIU_INT_SUM1; + const uint64_t ciu_en1_address = CVMX_CIU_INTX_EN1(core_id * 2 + 1); + unsigned long cop0_cause; + unsigned long cop0_status; + uint64_t ciu_en; + uint64_t ciu_sum; + + while (1) { + cop0_cause = read_c0_cause(); + cop0_status = read_c0_status(); + cop0_cause &= cop0_status; + cop0_cause &= ST0_IM; + + if (unlikely(cop0_cause & STATUSF_IP2)) { + ciu_sum = cvmx_read_csr(ciu_sum0_address); + ciu_en = cvmx_read_csr(ciu_en0_address); + ciu_sum &= ciu_en; + if (likely(ciu_sum)) + do_IRQ(fls64(ciu_sum) + OCTEON_IRQ_WORKQ0 - 1); + else + spurious_interrupt(); + } else if (unlikely(cop0_cause & STATUSF_IP3)) { + ciu_sum = cvmx_read_csr(ciu_sum1_address); + ciu_en = cvmx_read_csr(ciu_en1_address); + ciu_sum &= ciu_en; + if (likely(ciu_sum)) + do_IRQ(fls64(ciu_sum) + OCTEON_IRQ_WDOG0 - 1); + else + spurious_interrupt(); + } else if (likely(cop0_cause)) { + do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE); + } else { + break; + } + } +} diff --git a/arch/mips/cavium-octeon/octeon-memcpy.S b/arch/mips/cavium-octeon/octeon-memcpy.S new file mode 100644 index 000000000000..88e0cddca205 --- /dev/null +++ b/arch/mips/cavium-octeon/octeon-memcpy.S @@ -0,0 +1,521 @@ +/* + * 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. + * + * Unified implementation of memcpy, memmove and the __copy_user backend. + * + * Copyright (C) 1998, 99, 2000, 01, 2002 Ralf Baechle (ralf@gnu.org) + * Copyright (C) 1999, 2000, 01, 2002 Silicon Graphics, Inc. + * Copyright (C) 2002 Broadcom, Inc. + * memcpy/copy_user author: Mark Vandevoorde + * + * Mnemonic names for arguments to memcpy/__copy_user + */ + +#include <asm/asm.h> +#include <asm/asm-offsets.h> +#include <asm/regdef.h> + +#define dst a0 +#define src a1 +#define len a2 + +/* + * Spec + * + * memcpy copies len bytes from src to dst and sets v0 to dst. + * It assumes that + * - src and dst don't overlap + * - src is readable + * - dst is writable + * memcpy uses the standard calling convention + * + * __copy_user copies up to len bytes from src to dst and sets a2 (len) to + * the number of uncopied bytes due to an exception caused by a read or write. + * __copy_user assumes that src and dst don't overlap, and that the call is + * implementing one of the following: + * copy_to_user + * - src is readable (no exceptions when reading src) + * copy_from_user + * - dst is writable (no exceptions when writing dst) + * __copy_user uses a non-standard calling convention; see + * arch/mips/include/asm/uaccess.h + * + * When an exception happens on a load, the handler must + # ensure that all of the destination buffer is overwritten to prevent + * leaking information to user mode programs. + */ + +/* + * Implementation + */ + +/* + * The exception handler for loads requires that: + * 1- AT contain the address of the byte just past the end of the source + * of the copy, + * 2- src_entry <= src < AT, and + * 3- (dst - src) == (dst_entry - src_entry), + * The _entry suffix denotes values when __copy_user was called. + * + * (1) is set up up by uaccess.h and maintained by not writing AT in copy_user + * (2) is met by incrementing src by the number of bytes copied + * (3) is met by not doing loads between a pair of increments of dst and src + * + * The exception handlers for stores adjust len (if necessary) and return. + * These handlers do not need to overwrite any data. + * + * For __rmemcpy and memmove an exception is always a kernel bug, therefore + * they're not protected. + */ + +#define EXC(inst_reg,addr,handler) \ +9: inst_reg, addr; \ + .section __ex_table,"a"; \ + PTR 9b, handler; \ + .previous + +/* + * Only on the 64-bit kernel we can made use of 64-bit registers. + */ +#ifdef CONFIG_64BIT +#define USE_DOUBLE +#endif + +#ifdef USE_DOUBLE + +#define LOAD ld +#define LOADL ldl +#define LOADR ldr +#define STOREL sdl +#define STORER sdr +#define STORE sd +#define ADD daddu +#define SUB dsubu +#define SRL dsrl +#define SRA dsra +#define SLL dsll +#define SLLV dsllv +#define SRLV dsrlv +#define NBYTES 8 +#define LOG_NBYTES 3 + +/* + * As we are sharing code base with the mips32 tree (which use the o32 ABI + * register definitions). We need to redefine the register definitions from + * the n64 ABI register naming to the o32 ABI register naming. + */ +#undef t0 +#undef t1 +#undef t2 +#undef t3 +#define t0 $8 +#define t1 $9 +#define t2 $10 +#define t3 $11 +#define t4 $12 +#define t5 $13 +#define t6 $14 +#define t7 $15 + +#else + +#define LOAD lw +#define LOADL lwl +#define LOADR lwr +#define STOREL swl +#define STORER swr +#define STORE sw +#define ADD addu +#define SUB subu +#define SRL srl +#define SLL sll +#define SRA sra +#define SLLV sllv +#define SRLV srlv +#define NBYTES 4 +#define LOG_NBYTES 2 + +#endif /* USE_DOUBLE */ + +#ifdef CONFIG_CPU_LITTLE_ENDIAN +#define LDFIRST LOADR +#define LDREST LOADL +#define STFIRST STORER +#define STREST STOREL +#define SHIFT_DISCARD SLLV +#else +#define LDFIRST LOADL +#define LDREST LOADR +#define STFIRST STOREL +#define STREST STORER +#define SHIFT_DISCARD SRLV +#endif + +#define FIRST(unit) ((unit)*NBYTES) +#define REST(unit) (FIRST(unit)+NBYTES-1) +#define UNIT(unit) FIRST(unit) + +#define ADDRMASK (NBYTES-1) + + .text + .set noreorder + .set noat + +/* + * A combined memcpy/__copy_user + * __copy_user sets len to 0 for success; else to an upper bound of + * the number of uncopied bytes. + * memcpy sets v0 to dst. + */ + .align 5 +LEAF(memcpy) /* a0=dst a1=src a2=len */ + move v0, dst /* return value */ +__memcpy: +FEXPORT(__copy_user) + /* + * Note: dst & src may be unaligned, len may be 0 + * Temps + */ + # + # Octeon doesn't care if the destination is unaligned. The hardware + # can fix it faster than we can special case the assembly. + # + pref 0, 0(src) + sltu t0, len, NBYTES # Check if < 1 word + bnez t0, copy_bytes_checklen + and t0, src, ADDRMASK # Check if src unaligned + bnez t0, src_unaligned + sltu t0, len, 4*NBYTES # Check if < 4 words + bnez t0, less_than_4units + sltu t0, len, 8*NBYTES # Check if < 8 words + bnez t0, less_than_8units + sltu t0, len, 16*NBYTES # Check if < 16 words + bnez t0, cleanup_both_aligned + sltu t0, len, 128+1 # Check if len < 129 + bnez t0, 1f # Skip prefetch if len is too short + sltu t0, len, 256+1 # Check if len < 257 + bnez t0, 1f # Skip prefetch if len is too short + pref 0, 128(src) # We must not prefetch invalid addresses + # + # This is where we loop if there is more than 128 bytes left +2: pref 0, 256(src) # We must not prefetch invalid addresses + # + # This is where we loop if we can't prefetch anymore +1: +EXC( LOAD t0, UNIT(0)(src), l_exc) +EXC( LOAD t1, UNIT(1)(src), l_exc_copy) +EXC( LOAD t2, UNIT(2)(src), l_exc_copy) +EXC( LOAD t3, UNIT(3)(src), l_exc_copy) + SUB len, len, 16*NBYTES +EXC( STORE t0, UNIT(0)(dst), s_exc_p16u) +EXC( STORE t1, UNIT(1)(dst), s_exc_p15u) +EXC( STORE t2, UNIT(2)(dst), s_exc_p14u) +EXC( STORE t3, UNIT(3)(dst), s_exc_p13u) +EXC( LOAD t0, UNIT(4)(src), l_exc_copy) +EXC( LOAD t1, UNIT(5)(src), l_exc_copy) +EXC( LOAD t2, UNIT(6)(src), l_exc_copy) +EXC( LOAD t3, UNIT(7)(src), l_exc_copy) +EXC( STORE t0, UNIT(4)(dst), s_exc_p12u) +EXC( STORE t1, UNIT(5)(dst), s_exc_p11u) +EXC( STORE t2, UNIT(6)(dst), s_exc_p10u) + ADD src, src, 16*NBYTES +EXC( STORE t3, UNIT(7)(dst), s_exc_p9u) + ADD dst, dst, 16*NBYTES +EXC( LOAD t0, UNIT(-8)(src), l_exc_copy) +EXC( LOAD t1, UNIT(-7)(src), l_exc_copy) +EXC( LOAD t2, UNIT(-6)(src), l_exc_copy) +EXC( LOAD t3, UNIT(-5)(src), l_exc_copy) +EXC( STORE t0, UNIT(-8)(dst), s_exc_p8u) +EXC( STORE t1, UNIT(-7)(dst), s_exc_p7u) +EXC( STORE t2, UNIT(-6)(dst), s_exc_p6u) +EXC( STORE t3, UNIT(-5)(dst), s_exc_p5u) +EXC( LOAD t0, UNIT(-4)(src), l_exc_copy) +EXC( LOAD t1, UNIT(-3)(src), l_exc_copy) +EXC( LOAD t2, UNIT(-2)(src), l_exc_copy) +EXC( LOAD t3, UNIT(-1)(src), l_exc_copy) +EXC( STORE t0, UNIT(-4)(dst), s_exc_p4u) +EXC( STORE t1, UNIT(-3)(dst), s_exc_p3u) +EXC( STORE t2, UNIT(-2)(dst), s_exc_p2u) +EXC( STORE t3, UNIT(-1)(dst), s_exc_p1u) + sltu t0, len, 256+1 # See if we can prefetch more + beqz t0, 2b + sltu t0, len, 128 # See if we can loop more time + beqz t0, 1b + nop + # + # Jump here if there are less than 16*NBYTES left. + # +cleanup_both_aligned: + beqz len, done + sltu t0, len, 8*NBYTES + bnez t0, less_than_8units + nop +EXC( LOAD t0, UNIT(0)(src), l_exc) +EXC( LOAD t1, UNIT(1)(src), l_exc_copy) +EXC( LOAD t2, UNIT(2)(src), l_exc_copy) +EXC( LOAD t3, UNIT(3)(src), l_exc_copy) + SUB len, len, 8*NBYTES +EXC( STORE t0, UNIT(0)(dst), s_exc_p8u) +EXC( STORE t1, UNIT(1)(dst), s_exc_p7u) +EXC( STORE t2, UNIT(2)(dst), s_exc_p6u) +EXC( STORE t3, UNIT(3)(dst), s_exc_p5u) +EXC( LOAD t0, UNIT(4)(src), l_exc_copy) +EXC( LOAD t1, UNIT(5)(src), l_exc_copy) +EXC( LOAD t2, UNIT(6)(src), l_exc_copy) +EXC( LOAD t3, UNIT(7)(src), l_exc_copy) +EXC( STORE t0, UNIT(4)(dst), s_exc_p4u) +EXC( STORE t1, UNIT(5)(dst), s_exc_p3u) +EXC( STORE t2, UNIT(6)(dst), s_exc_p2u) +EXC( STORE t3, UNIT(7)(dst), s_exc_p1u) + ADD src, src, 8*NBYTES + beqz len, done + ADD dst, dst, 8*NBYTES + # + # Jump here if there are less than 8*NBYTES left. + # +less_than_8units: + sltu t0, len, 4*NBYTES + bnez t0, less_than_4units + nop +EXC( LOAD t0, UNIT(0)(src), l_exc) +EXC( LOAD t1, UNIT(1)(src), l_exc_copy) +EXC( LOAD t2, UNIT(2)(src), l_exc_copy) +EXC( LOAD t3, UNIT(3)(src), l_exc_copy) + SUB len, len, 4*NBYTES +EXC( STORE t0, UNIT(0)(dst), s_exc_p4u) +EXC( STORE t1, UNIT(1)(dst), s_exc_p3u) +EXC( STORE t2, UNIT(2)(dst), s_exc_p2u) +EXC( STORE t3, UNIT(3)(dst), s_exc_p1u) + ADD src, src, 4*NBYTES + beqz len, done + ADD dst, dst, 4*NBYTES + # + # Jump here if there are less than 4*NBYTES left. This means + # we may need to copy up to 3 NBYTES words. + # +less_than_4units: + sltu t0, len, 1*NBYTES + bnez t0, copy_bytes_checklen + nop + # + # 1) Copy NBYTES, then check length again + # +EXC( LOAD t0, 0(src), l_exc) + SUB len, len, NBYTES + sltu t1, len, 8 +EXC( STORE t0, 0(dst), s_exc_p1u) + ADD src, src, NBYTES + bnez t1, copy_bytes_checklen + ADD dst, dst, NBYTES + # + # 2) Copy NBYTES, then check length again + # +EXC( LOAD t0, 0(src), l_exc) + SUB len, len, NBYTES + sltu t1, len, 8 +EXC( STORE t0, 0(dst), s_exc_p1u) + ADD src, src, NBYTES + bnez t1, copy_bytes_checklen + ADD dst, dst, NBYTES + # + # 3) Copy NBYTES, then check length again + # +EXC( LOAD t0, 0(src), l_exc) + SUB len, len, NBYTES + ADD src, src, NBYTES + ADD dst, dst, NBYTES + b copy_bytes_checklen +EXC( STORE t0, -8(dst), s_exc_p1u) + +src_unaligned: +#define rem t8 + SRL t0, len, LOG_NBYTES+2 # +2 for 4 units/iter + beqz t0, cleanup_src_unaligned + and rem, len, (4*NBYTES-1) # rem = len % 4*NBYTES +1: +/* + * Avoid consecutive LD*'s to the same register since some mips + * implementations can't issue them in the same cycle. + * It's OK to load FIRST(N+1) before REST(N) because the two addresses + * are to the same unit (unless src is aligned, but it's not). + */ +EXC( LDFIRST t0, FIRST(0)(src), l_exc) +EXC( LDFIRST t1, FIRST(1)(src), l_exc_copy) + SUB len, len, 4*NBYTES +EXC( LDREST t0, REST(0)(src), l_exc_copy) +EXC( LDREST t1, REST(1)(src), l_exc_copy) +EXC( LDFIRST t2, FIRST(2)(src), l_exc_copy) +EXC( LDFIRST t3, FIRST(3)(src), l_exc_copy) +EXC( LDREST t2, REST(2)(src), l_exc_copy) +EXC( LDREST t3, REST(3)(src), l_exc_copy) + ADD src, src, 4*NBYTES +EXC( STORE t0, UNIT(0)(dst), s_exc_p4u) +EXC( STORE t1, UNIT(1)(dst), s_exc_p3u) +EXC( STORE t2, UNIT(2)(dst), s_exc_p2u) +EXC( STORE t3, UNIT(3)(dst), s_exc_p1u) + bne len, rem, 1b + ADD dst, dst, 4*NBYTES + +cleanup_src_unaligned: + beqz len, done + and rem, len, NBYTES-1 # rem = len % NBYTES + beq rem, len, copy_bytes + nop +1: +EXC( LDFIRST t0, FIRST(0)(src), l_exc) +EXC( LDREST t0, REST(0)(src), l_exc_copy) + SUB len, len, NBYTES +EXC( STORE t0, 0(dst), s_exc_p1u) + ADD src, src, NBYTES + bne len, rem, 1b + ADD dst, dst, NBYTES + +copy_bytes_checklen: + beqz len, done + nop +copy_bytes: + /* 0 < len < NBYTES */ +#define COPY_BYTE(N) \ +EXC( lb t0, N(src), l_exc); \ + SUB len, len, 1; \ + beqz len, done; \ +EXC( sb t0, N(dst), s_exc_p1) + + COPY_BYTE(0) + COPY_BYTE(1) +#ifdef USE_DOUBLE + COPY_BYTE(2) + COPY_BYTE(3) + COPY_BYTE(4) + COPY_BYTE(5) +#endif +EXC( lb t0, NBYTES-2(src), l_exc) + SUB len, len, 1 + jr ra +EXC( sb t0, NBYTES-2(dst), s_exc_p1) +done: + jr ra + nop + END(memcpy) + +l_exc_copy: + /* + * Copy bytes from src until faulting load address (or until a + * lb faults) + * + * When reached by a faulting LDFIRST/LDREST, THREAD_BUADDR($28) + * may be more than a byte beyond the last address. + * Hence, the lb below may get an exception. + * + * Assumes src < THREAD_BUADDR($28) + */ + LOAD t0, TI_TASK($28) + nop + LOAD t0, THREAD_BUADDR(t0) +1: +EXC( lb t1, 0(src), l_exc) + ADD src, src, 1 + sb t1, 0(dst) # can't fault -- we're copy_from_user + bne src, t0, 1b + ADD dst, dst, 1 +l_exc: + LOAD t0, TI_TASK($28) + nop + LOAD t0, THREAD_BUADDR(t0) # t0 is just past last good address + nop + SUB len, AT, t0 # len number of uncopied bytes + /* + * Here's where we rely on src and dst being incremented in tandem, + * See (3) above. + * dst += (fault addr - src) to put dst at first byte to clear + */ + ADD dst, t0 # compute start address in a1 + SUB dst, src + /* + * Clear len bytes starting at dst. Can't call __bzero because it + * might modify len. An inefficient loop for these rare times... + */ + beqz len, done + SUB src, len, 1 +1: sb zero, 0(dst) + ADD dst, dst, 1 + bnez src, 1b + SUB src, src, 1 + jr ra + nop + + +#define SEXC(n) \ +s_exc_p ## n ## u: \ + jr ra; \ + ADD len, len, n*NBYTES + +SEXC(16) +SEXC(15) +SEXC(14) +SEXC(13) +SEXC(12) +SEXC(11) +SEXC(10) +SEXC(9) +SEXC(8) +SEXC(7) +SEXC(6) +SEXC(5) +SEXC(4) +SEXC(3) +SEXC(2) +SEXC(1) + +s_exc_p1: + jr ra + ADD len, len, 1 +s_exc: + jr ra + nop + + .align 5 +LEAF(memmove) + ADD t0, a0, a2 + ADD t1, a1, a2 + sltu t0, a1, t0 # dst + len <= src -> memcpy + sltu t1, a0, t1 # dst >= src + len -> memcpy + and t0, t1 + beqz t0, __memcpy + move v0, a0 /* return value */ + beqz a2, r_out + END(memmove) + + /* fall through to __rmemcpy */ +LEAF(__rmemcpy) /* a0=dst a1=src a2=len */ + sltu t0, a1, a0 + beqz t0, r_end_bytes_up # src >= dst + nop + ADD a0, a2 # dst = dst + len + ADD a1, a2 # src = src + len + +r_end_bytes: + lb t0, -1(a1) + SUB a2, a2, 0x1 + sb t0, -1(a0) + SUB a1, a1, 0x1 + bnez a2, r_end_bytes + SUB a0, a0, 0x1 + +r_out: + jr ra + move a2, zero + +r_end_bytes_up: + lb t0, (a1) + SUB a2, a2, 0x1 + sb t0, (a0) + ADD a1, a1, 0x1 + bnez a2, r_end_bytes_up + ADD a0, a0, 0x1 + + jr ra + move a2, zero + END(__rmemcpy) diff --git a/arch/mips/cavium-octeon/serial.c b/arch/mips/cavium-octeon/serial.c new file mode 100644 index 000000000000..8240728d485a --- /dev/null +++ b/arch/mips/cavium-octeon/serial.c @@ -0,0 +1,136 @@ +/* + * 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. + * + * Copyright (C) 2004-2007 Cavium Networks + */ +#include <linux/console.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/serial.h> +#include <linux/serial_8250.h> +#include <linux/serial_reg.h> +#include <linux/tty.h> + +#include <asm/time.h> + +#include <asm/octeon/octeon.h> + +#ifdef CONFIG_GDB_CONSOLE +#define DEBUG_UART 0 +#else +#define DEBUG_UART 1 +#endif + +unsigned int octeon_serial_in(struct uart_port *up, int offset) +{ + int rv = cvmx_read_csr((uint64_t)(up->membase + (offset << 3))); + if (offset == UART_IIR && (rv & 0xf) == 7) { + /* Busy interrupt, read the USR (39) and try again. */ + cvmx_read_csr((uint64_t)(up->membase + (39 << 3))); + rv = cvmx_read_csr((uint64_t)(up->membase + (offset << 3))); + } + return rv; +} + +void octeon_serial_out(struct uart_port *up, int offset, int value) +{ + /* + * If bits 6 or 7 of the OCTEON UART's LCR are set, it quits + * working. + */ + if (offset == UART_LCR) + value &= 0x9f; + cvmx_write_csr((uint64_t)(up->membase + (offset << 3)), (u8)value); +} + +/* + * Allocated in .bss, so it is all zeroed. + */ +#define OCTEON_MAX_UARTS 3 +static struct plat_serial8250_port octeon_uart8250_data[OCTEON_MAX_UARTS + 1]; +static struct platform_device octeon_uart8250_device = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev = { + .platform_data = octeon_uart8250_data, + }, +}; + +static void __init octeon_uart_set_common(struct plat_serial8250_port *p) +{ + p->flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE; + p->type = PORT_OCTEON; + p->iotype = UPIO_MEM; + p->regshift = 3; /* I/O addresses are every 8 bytes */ + p->uartclk = mips_hpt_frequency; + p->serial_in = octeon_serial_in; + p->serial_out = octeon_serial_out; +} + +static int __init octeon_serial_init(void) +{ + int enable_uart0; + int enable_uart1; + int enable_uart2; + struct plat_serial8250_port *p; + +#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL + /* + * If we are configured to run as the second of two kernels, + * disable uart0 and enable uart1. Uart0 is owned by the first + * kernel + */ + enable_uart0 = 0; + enable_uart1 = 1; +#else + /* + * We are configured for the first kernel. We'll enable uart0 + * if the bootloader told us to use 0, otherwise will enable + * uart 1. + */ + enable_uart0 = (octeon_get_boot_uart() == 0); + enable_uart1 = (octeon_get_boot_uart() == 1); +#ifdef CONFIG_KGDB + enable_uart1 = 1; +#endif +#endif + + /* Right now CN52XX is the only chip with a third uart */ + enable_uart2 = OCTEON_IS_MODEL(OCTEON_CN52XX); + + p = octeon_uart8250_data; + if (enable_uart0) { + /* Add a ttyS device for hardware uart 0 */ + octeon_uart_set_common(p); + p->membase = (void *) CVMX_MIO_UARTX_RBR(0); + p->mapbase = CVMX_MIO_UARTX_RBR(0) & ((1ull << 49) - 1); + p->irq = OCTEON_IRQ_UART0; + p++; + } + + if (enable_uart1) { + /* Add a ttyS device for hardware uart 1 */ + octeon_uart_set_common(p); + p->membase = (void *) CVMX_MIO_UARTX_RBR(1); + p->mapbase = CVMX_MIO_UARTX_RBR(1) & ((1ull << 49) - 1); + p->irq = OCTEON_IRQ_UART1; + p++; + } + if (enable_uart2) { + /* Add a ttyS device for hardware uart 2 */ + octeon_uart_set_common(p); + p->membase = (void *) CVMX_MIO_UART2_RBR; + p->mapbase = CVMX_MIO_UART2_RBR & ((1ull << 49) - 1); + p->irq = OCTEON_IRQ_UART2; + p++; + } + + BUG_ON(p > &octeon_uart8250_data[OCTEON_MAX_UARTS]); + + return platform_device_register(&octeon_uart8250_device); +} + +device_initcall(octeon_serial_init); diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c new file mode 100644 index 000000000000..e085feddb4a4 --- /dev/null +++ b/arch/mips/cavium-octeon/setup.c @@ -0,0 +1,929 @@ +/* + * 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. + * + * Copyright (C) 2004-2007 Cavium Networks + * Copyright (C) 2008 Wind River Systems + */ +#include <linux/init.h> +#include <linux/console.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/serial.h> +#include <linux/types.h> +#include <linux/string.h> /* for memset */ +#include <linux/serial.h> +#include <linux/tty.h> +#include <linux/time.h> +#include <linux/platform_device.h> +#include <linux/serial_core.h> +#include <linux/serial_8250.h> +#include <linux/string.h> + +#include <asm/processor.h> +#include <asm/reboot.h> +#include <asm/smp-ops.h> +#include <asm/system.h> +#include <asm/irq_cpu.h> +#include <asm/mipsregs.h> +#include <asm/bootinfo.h> +#include <asm/sections.h> +#include <asm/time.h> + +#include <asm/octeon/octeon.h> + +#ifdef CONFIG_CAVIUM_DECODE_RSL +extern void cvmx_interrupt_rsl_decode(void); +extern int __cvmx_interrupt_ecc_report_single_bit_errors; +extern void cvmx_interrupt_rsl_enable(void); +#endif + +extern struct plat_smp_ops octeon_smp_ops; + +#ifdef CONFIG_PCI +extern void pci_console_init(const char *arg); +#endif + +#ifdef CONFIG_CAVIUM_RESERVE32 +extern uint64_t octeon_reserve32_memory; +#endif +static unsigned long long MAX_MEMORY = 512ull << 20; + +struct octeon_boot_descriptor *octeon_boot_desc_ptr; + +struct cvmx_bootinfo *octeon_bootinfo; +EXPORT_SYMBOL(octeon_bootinfo); + +#ifdef CONFIG_CAVIUM_RESERVE32 +uint64_t octeon_reserve32_memory; +EXPORT_SYMBOL(octeon_reserve32_memory); +#endif + +static int octeon_uart; + +extern asmlinkage void handle_int(void); +extern asmlinkage void plat_irq_dispatch(void); + +/** + * Return non zero if we are currently running in the Octeon simulator + * + * Returns + */ +int octeon_is_simulation(void) +{ + return octeon_bootinfo->board_type == CVMX_BOARD_TYPE_SIM; +} +EXPORT_SYMBOL(octeon_is_simulation); + +/** + * Return true if Octeon is in PCI Host mode. This means + * Linux can control the PCI bus. + * + * Returns Non zero if Octeon in host mode. + */ +int octeon_is_pci_host(void) +{ +#ifdef CONFIG_PCI + return octeon_bootinfo->config_flags & CVMX_BOOTINFO_CFG_FLAG_PCI_HOST; +#else + return 0; +#endif +} + +/** + * Get the clock rate of Octeon + * + * Returns Clock rate in HZ + */ +uint64_t octeon_get_clock_rate(void) +{ + if (octeon_is_simulation()) + octeon_bootinfo->eclock_hz = 6000000; + return octeon_bootinfo->eclock_hz; +} +EXPORT_SYMBOL(octeon_get_clock_rate); + +/** + * Write to the LCD display connected to the bootbus. This display + * exists on most Cavium evaluation boards. If it doesn't exist, then + * this function doesn't do anything. + * + * @s: String to write + */ +void octeon_write_lcd(const char *s) +{ + if (octeon_bootinfo->led_display_base_addr) { + void __iomem *lcd_address = + ioremap_nocache(octeon_bootinfo->led_display_base_addr, + 8); + int i; + for (i = 0; i < 8; i++, s++) { + if (*s) + iowrite8(*s, lcd_address + i); + else + iowrite8(' ', lcd_address + i); + } + iounmap(lcd_address); + } +} + +/** + * Return the console uart passed by the bootloader + * + * Returns uart (0 or 1) + */ +int octeon_get_boot_uart(void) +{ + int uart; +#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL + uart = 1; +#else + uart = (octeon_boot_desc_ptr->flags & OCTEON_BL_FLAG_CONSOLE_UART1) ? + 1 : 0; +#endif + return uart; +} + +/** + * Get the coremask Linux was booted on. + * + * Returns Core mask + */ +int octeon_get_boot_coremask(void) +{ + return octeon_boot_desc_ptr->core_mask; +} + +/** + * Check the hardware BIST results for a CPU + */ +void octeon_check_cpu_bist(void) +{ + const int coreid = cvmx_get_core_num(); + unsigned long long mask; + unsigned long long bist_val; + + /* Check BIST results for COP0 registers */ + mask = 0x1f00000000ull; + bist_val = read_octeon_c0_icacheerr(); + if (bist_val & mask) + pr_err("Core%d BIST Failure: CacheErr(icache) = 0x%llx\n", + coreid, bist_val); + + bist_val = read_octeon_c0_dcacheerr(); + if (bist_val & 1) + pr_err("Core%d L1 Dcache parity error: " + "CacheErr(dcache) = 0x%llx\n", + coreid, bist_val); + + mask = 0xfc00000000000000ull; + bist_val = read_c0_cvmmemctl(); + if (bist_val & mask) + pr_err("Core%d BIST Failure: COP0_CVM_MEM_CTL = 0x%llx\n", + coreid, bist_val); + + write_octeon_c0_dcacheerr(0); +} + +#ifdef CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB +/** + * Called on every core to setup the wired tlb entry needed + * if CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB is set. + * + */ +static void octeon_hal_setup_per_cpu_reserved32(void *unused) +{ + /* + * The config has selected to wire the reserve32 memory for all + * userspace applications. We need to put a wired TLB entry in for each + * 512MB of reserve32 memory. We only handle double 256MB pages here, + * so reserve32 must be multiple of 512MB. + */ + uint32_t size = CONFIG_CAVIUM_RESERVE32; + uint32_t entrylo0 = + 0x7 | ((octeon_reserve32_memory & ((1ul << 40) - 1)) >> 6); + uint32_t entrylo1 = entrylo0 + (256 << 14); + uint32_t entryhi = (0x80000000UL - (CONFIG_CAVIUM_RESERVE32 << 20)); + while (size >= 512) { +#if 0 + pr_info("CPU%d: Adding double wired TLB entry for 0x%lx\n", + smp_processor_id(), entryhi); +#endif + add_wired_entry(entrylo0, entrylo1, entryhi, PM_256M); + entrylo0 += 512 << 14; + entrylo1 += 512 << 14; + entryhi += 512 << 20; + size -= 512; + } +} +#endif /* CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB */ + +/** + * Called to release the named block which was used to made sure + * that nobody used the memory for something else during + * init. Now we'll free it so userspace apps can use this + * memory region with bootmem_alloc. + * + * This function is called only once from prom_free_prom_memory(). + */ +void octeon_hal_setup_reserved32(void) +{ +#ifdef CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB + on_each_cpu(octeon_hal_setup_per_cpu_reserved32, NULL, 0, 1); +#endif +} + +/** + * Reboot Octeon + * + * @command: Command to pass to the bootloader. Currently ignored. + */ +static void octeon_restart(char *command) +{ + /* Disable all watchdogs before soft reset. They don't get cleared */ +#ifdef CONFIG_SMP + int cpu; + for_each_online_cpu(cpu) + cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0); +#else + cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0); +#endif + + mb(); + while (1) + cvmx_write_csr(CVMX_CIU_SOFT_RST, 1); +} + + +/** + * Permanently stop a core. + * + * @arg: Ignored. + */ +static void octeon_kill_core(void *arg) +{ + mb(); + if (octeon_is_simulation()) { + /* The simulator needs the watchdog to stop for dead cores */ + cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0); + /* A break instruction causes the simulator stop a core */ + asm volatile ("sync\nbreak"); + } +} + + +/** + * Halt the system + */ +static void octeon_halt(void) +{ + smp_call_function(octeon_kill_core, NULL, 0); + + switch (octeon_bootinfo->board_type) { + case CVMX_BOARD_TYPE_NAO38: + /* Driving a 1 to GPIO 12 shuts off this board */ + cvmx_write_csr(CVMX_GPIO_BIT_CFGX(12), 1); + cvmx_write_csr(CVMX_GPIO_TX_SET, 0x1000); + break; + default: + octeon_write_lcd("PowerOff"); + break; + } + + octeon_kill_core(NULL); +} + +#if 0 +/** + * Platform time init specifics. + * Returns + */ +void __init plat_time_init(void) +{ + /* Nothing special here, but we are required to have one */ +} + +#endif + +/** + * Handle all the error condition interrupts that might occur. + * + */ +#ifdef CONFIG_CAVIUM_DECODE_RSL +static irqreturn_t octeon_rlm_interrupt(int cpl, void *dev_id) +{ + cvmx_interrupt_rsl_decode(); + return IRQ_HANDLED; +} +#endif + +/** + * Return a string representing the system type + * + * Returns + */ +const char *octeon_board_type_string(void) +{ + static char name[80]; + sprintf(name, "%s (%s)", + cvmx_board_type_to_string(octeon_bootinfo->board_type), + octeon_model_get_string(read_c0_prid())); + return name; +} + +const char *get_system_type(void) + __attribute__ ((alias("octeon_board_type_string"))); + +void octeon_user_io_init(void) +{ + union octeon_cvmemctl cvmmemctl; + union cvmx_iob_fau_timeout fau_timeout; + union cvmx_pow_nw_tim nm_tim; + uint64_t cvmctl; + + /* Get the current settings for CP0_CVMMEMCTL_REG */ + cvmmemctl.u64 = read_c0_cvmmemctl(); + /* R/W If set, marked write-buffer entries time out the same + * as as other entries; if clear, marked write-buffer entries + * use the maximum timeout. */ + cvmmemctl.s.dismarkwblongto = 1; + /* R/W If set, a merged store does not clear the write-buffer + * entry timeout state. */ + cvmmemctl.s.dismrgclrwbto = 0; + /* R/W Two bits that are the MSBs of the resultant CVMSEG LM + * word location for an IOBDMA. The other 8 bits come from the + * SCRADDR field of the IOBDMA. */ + cvmmemctl.s.iobdmascrmsb = 0; + /* R/W If set, SYNCWS and SYNCS only order marked stores; if + * clear, SYNCWS and SYNCS only order unmarked + * stores. SYNCWSMARKED has no effect when DISSYNCWS is + * set. */ + cvmmemctl.s.syncwsmarked = 0; + /* R/W If set, SYNCWS acts as SYNCW and SYNCS acts as SYNC. */ + cvmmemctl.s.dissyncws = 0; + /* R/W If set, no stall happens on write buffer full. */ + if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) + cvmmemctl.s.diswbfst = 1; + else + cvmmemctl.s.diswbfst = 0; + /* R/W If set (and SX set), supervisor-level loads/stores can + * use XKPHYS addresses with <48>==0 */ + cvmmemctl.s.xkmemenas = 0; + + /* R/W If set (and UX set), user-level loads/stores can use + * XKPHYS addresses with VA<48>==0 */ + cvmmemctl.s.xkmemenau = 0; + + /* R/W If set (and SX set), supervisor-level loads/stores can + * use XKPHYS addresses with VA<48>==1 */ + cvmmemctl.s.xkioenas = 0; + + /* R/W If set (and UX set), user-level loads/stores can use + * XKPHYS addresses with VA<48>==1 */ + cvmmemctl.s.xkioenau = 0; + + /* R/W If set, all stores act as SYNCW (NOMERGE must be set + * when this is set) RW, reset to 0. */ + cvmmemctl.s.allsyncw = 0; + + /* R/W If set, no stores merge, and all stores reach the + * coherent bus in order. */ + cvmmemctl.s.nomerge = 0; + /* R/W Selects the bit in the counter used for DID time-outs 0 + * = 231, 1 = 230, 2 = 229, 3 = 214. Actual time-out is + * between 1x and 2x this interval. For example, with + * DIDTTO=3, expiration interval is between 16K and 32K. */ + cvmmemctl.s.didtto = 0; + /* R/W If set, the (mem) CSR clock never turns off. */ + cvmmemctl.s.csrckalwys = 0; + /* R/W If set, mclk never turns off. */ + cvmmemctl.s.mclkalwys = 0; + /* R/W Selects the bit in the counter used for write buffer + * flush time-outs (WBFLT+11) is the bit position in an + * internal counter used to determine expiration. The write + * buffer expires between 1x and 2x this interval. For + * example, with WBFLT = 0, a write buffer expires between 2K + * and 4K cycles after the write buffer entry is allocated. */ + cvmmemctl.s.wbfltime = 0; + /* R/W If set, do not put Istream in the L2 cache. */ + cvmmemctl.s.istrnol2 = 0; + /* R/W The write buffer threshold. */ + cvmmemctl.s.wbthresh = 10; + /* R/W If set, CVMSEG is available for loads/stores in + * kernel/debug mode. */ +#if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0 + cvmmemctl.s.cvmsegenak = 1; +#else + cvmmemctl.s.cvmsegenak = 0; +#endif + /* R/W If set, CVMSEG is available for loads/stores in + * supervisor mode. */ + cvmmemctl.s.cvmsegenas = 0; + /* R/W If set, CVMSEG is available for loads/stores in user + * mode. */ + cvmmemctl.s.cvmsegenau = 0; + /* R/W Size of local memory in cache blocks, 54 (6912 bytes) + * is max legal value. */ + cvmmemctl.s.lmemsz = CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE; + + + if (smp_processor_id() == 0) + pr_notice("CVMSEG size: %d cache lines (%d bytes)\n", + CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE, + CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128); + + write_c0_cvmmemctl(cvmmemctl.u64); + + /* Move the performance counter interrupts to IRQ 6 */ + cvmctl = read_c0_cvmctl(); + cvmctl &= ~(7 << 7); + cvmctl |= 6 << 7; + write_c0_cvmctl(cvmctl); + + /* Set a default for the hardware timeouts */ + fau_timeout.u64 = 0; + fau_timeout.s.tout_val = 0xfff; + /* Disable tagwait FAU timeout */ + fau_timeout.s.tout_enb = 0; + cvmx_write_csr(CVMX_IOB_FAU_TIMEOUT, fau_timeout.u64); + + nm_tim.u64 = 0; + /* 4096 cycles */ + nm_tim.s.nw_tim = 3; + cvmx_write_csr(CVMX_POW_NW_TIM, nm_tim.u64); + + write_octeon_c0_icacheerr(0); + write_c0_derraddr1(0); +} + +/** + * Early entry point for arch setup + */ +void __init prom_init(void) +{ + struct cvmx_sysinfo *sysinfo; + const int coreid = cvmx_get_core_num(); + int i; + int argc; + struct uart_port octeon_port; +#ifdef CONFIG_CAVIUM_RESERVE32 + int64_t addr = -1; +#endif + /* + * The bootloader passes a pointer to the boot descriptor in + * $a3, this is available as fw_arg3. + */ + octeon_boot_desc_ptr = (struct octeon_boot_descriptor *)fw_arg3; + octeon_bootinfo = + cvmx_phys_to_ptr(octeon_boot_desc_ptr->cvmx_desc_vaddr); + cvmx_bootmem_init(cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr)); + + /* + * Only enable the LED controller if we're running on a CN38XX, CN58XX, + * or CN56XX. The CN30XX and CN31XX don't have an LED controller. + */ + if (!octeon_is_simulation() && + octeon_has_feature(OCTEON_FEATURE_LED_CONTROLLER)) { + cvmx_write_csr(CVMX_LED_EN, 0); + cvmx_write_csr(CVMX_LED_PRT, 0); + cvmx_write_csr(CVMX_LED_DBG, 0); + cvmx_write_csr(CVMX_LED_PRT_FMT, 0); + cvmx_write_csr(CVMX_LED_UDD_CNTX(0), 32); + cvmx_write_csr(CVMX_LED_UDD_CNTX(1), 32); + cvmx_write_csr(CVMX_LED_UDD_DATX(0), 0); + cvmx_write_csr(CVMX_LED_UDD_DATX(1), 0); + cvmx_write_csr(CVMX_LED_EN, 1); + } +#ifdef CONFIG_CAVIUM_RESERVE32 + /* + * We need to temporarily allocate all memory in the reserve32 + * region. This makes sure the kernel doesn't allocate this + * memory when it is getting memory from the + * bootloader. Later, after the memory allocations are + * complete, the reserve32 will be freed. + */ +#ifdef CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB + if (CONFIG_CAVIUM_RESERVE32 & 0x1ff) + pr_err("CAVIUM_RESERVE32 isn't a multiple of 512MB. " + "This is required if CAVIUM_RESERVE32_USE_WIRED_TLB " + "is set\n"); + else + addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20, + 0, 0, 512 << 20, + "CAVIUM_RESERVE32", 0); +#else + /* + * Allocate memory for RESERVED32 aligned on 2MB boundary. This + * is in case we later use hugetlb entries with it. + */ + addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20, + 0, 0, 2 << 20, + "CAVIUM_RESERVE32", 0); +#endif + if (addr < 0) + pr_err("Failed to allocate CAVIUM_RESERVE32 memory area\n"); + else + octeon_reserve32_memory = addr; +#endif + +#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2 + if (cvmx_read_csr(CVMX_L2D_FUS3) & (3ull << 34)) { + pr_info("Skipping L2 locking due to reduced L2 cache size\n"); + } else { + uint32_t ebase = read_c0_ebase() & 0x3ffff000; +#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_TLB + /* TLB refill */ + cvmx_l2c_lock_mem_region(ebase, 0x100); +#endif +#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_EXCEPTION + /* General exception */ + cvmx_l2c_lock_mem_region(ebase + 0x180, 0x80); +#endif +#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT + /* Interrupt handler */ + cvmx_l2c_lock_mem_region(ebase + 0x200, 0x80); +#endif +#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_INTERRUPT + cvmx_l2c_lock_mem_region(__pa_symbol(handle_int), 0x100); + cvmx_l2c_lock_mem_region(__pa_symbol(plat_irq_dispatch), 0x80); +#endif +#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_MEMCPY + cvmx_l2c_lock_mem_region(__pa_symbol(memcpy), 0x480); +#endif + } +#endif + + sysinfo = cvmx_sysinfo_get(); + memset(sysinfo, 0, sizeof(*sysinfo)); + sysinfo->system_dram_size = octeon_bootinfo->dram_size << 20; + sysinfo->phy_mem_desc_ptr = + cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr); + sysinfo->core_mask = octeon_bootinfo->core_mask; + sysinfo->exception_base_addr = octeon_bootinfo->exception_base_addr; + sysinfo->cpu_clock_hz = octeon_bootinfo->eclock_hz; + sysinfo->dram_data_rate_hz = octeon_bootinfo->dclock_hz * 2; + sysinfo->board_type = octeon_bootinfo->board_type; + sysinfo->board_rev_major = octeon_bootinfo->board_rev_major; + sysinfo->board_rev_minor = octeon_bootinfo->board_rev_minor; + memcpy(sysinfo->mac_addr_base, octeon_bootinfo->mac_addr_base, + sizeof(sysinfo->mac_addr_base)); + sysinfo->mac_addr_count = octeon_bootinfo->mac_addr_count; + memcpy(sysinfo->board_serial_number, + octeon_bootinfo->board_serial_number, + sizeof(sysinfo->board_serial_number)); + sysinfo->compact_flash_common_base_addr = + octeon_bootinfo->compact_flash_common_base_addr; + sysinfo->compact_flash_attribute_base_addr = + octeon_bootinfo->compact_flash_attribute_base_addr; + sysinfo->led_display_base_addr = octeon_bootinfo->led_display_base_addr; + sysinfo->dfa_ref_clock_hz = octeon_bootinfo->dfa_ref_clock_hz; + sysinfo->bootloader_config_flags = octeon_bootinfo->config_flags; + + + octeon_check_cpu_bist(); + + octeon_uart = octeon_get_boot_uart(); + + /* + * Disable All CIU Interrupts. The ones we need will be + * enabled later. Read the SUM register so we know the write + * completed. + */ + cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), 0); + cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0); + cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0); + cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0); + cvmx_read_csr(CVMX_CIU_INTX_SUM0((coreid * 2))); + +#ifdef CONFIG_SMP + octeon_write_lcd("LinuxSMP"); +#else + octeon_write_lcd("Linux"); +#endif + +#ifdef CONFIG_CAVIUM_GDB + /* + * When debugging the linux kernel, force the cores to enter + * the debug exception handler to break in. + */ + if (octeon_get_boot_debug_flag()) { + cvmx_write_csr(CVMX_CIU_DINT, 1 << cvmx_get_core_num()); + cvmx_read_csr(CVMX_CIU_DINT); + } +#endif + + /* + * BIST should always be enabled when doing a soft reset. L2 + * Cache locking for instance is not cleared unless BIST is + * enabled. Unfortunately due to a chip errata G-200 for + * Cn38XX and CN31XX, BIST msut be disabled on these parts. + */ + if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) || + OCTEON_IS_MODEL(OCTEON_CN31XX)) + cvmx_write_csr(CVMX_CIU_SOFT_BIST, 0); + else + cvmx_write_csr(CVMX_CIU_SOFT_BIST, 1); + + /* Default to 64MB in the simulator to speed things up */ + if (octeon_is_simulation()) + MAX_MEMORY = 64ull << 20; + + arcs_cmdline[0] = 0; + argc = octeon_boot_desc_ptr->argc; + for (i = 0; i < argc; i++) { + const char *arg = + cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]); + if ((strncmp(arg, "MEM=", 4) == 0) || + (strncmp(arg, "mem=", 4) == 0)) { + sscanf(arg + 4, "%llu", &MAX_MEMORY); + MAX_MEMORY <<= 20; + if (MAX_MEMORY == 0) + MAX_MEMORY = 32ull << 30; + } else if (strcmp(arg, "ecc_verbose") == 0) { +#ifdef CONFIG_CAVIUM_REPORT_SINGLE_BIT_ECC + __cvmx_interrupt_ecc_report_single_bit_errors = 1; + pr_notice("Reporting of single bit ECC errors is " + "turned on\n"); +#endif + } else if (strlen(arcs_cmdline) + strlen(arg) + 1 < + sizeof(arcs_cmdline) - 1) { + strcat(arcs_cmdline, " "); + strcat(arcs_cmdline, arg); + } + } + + if (strstr(arcs_cmdline, "console=") == NULL) { +#ifdef CONFIG_GDB_CONSOLE + strcat(arcs_cmdline, " console=gdb"); +#else +#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL + strcat(arcs_cmdline, " console=ttyS0,115200"); +#else + if (octeon_uart == 1) + strcat(arcs_cmdline, " console=ttyS1,115200"); + else + strcat(arcs_cmdline, " console=ttyS0,115200"); +#endif +#endif + } + + if (octeon_is_simulation()) { + /* + * The simulator uses a mtdram device pre filled with + * the filesystem. Also specify the calibration delay + * to avoid calculating it every time. + */ + strcat(arcs_cmdline, " rw root=1f00" + " lpj=60176 slram=root,0x40000000,+1073741824"); + } + + mips_hpt_frequency = octeon_get_clock_rate(); + + octeon_init_cvmcount(); + + _machine_restart = octeon_restart; + _machine_halt = octeon_halt; + + memset(&octeon_port, 0, sizeof(octeon_port)); + /* + * For early_serial_setup we don't set the port type or + * UPF_FIXED_TYPE. + */ + octeon_port.flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ; + octeon_port.iotype = UPIO_MEM; + /* I/O addresses are every 8 bytes */ + octeon_port.regshift = 3; + /* Clock rate of the chip */ + octeon_port.uartclk = mips_hpt_frequency; + octeon_port.fifosize = 64; + octeon_port.mapbase = 0x0001180000000800ull + (1024 * octeon_uart); + octeon_port.membase = cvmx_phys_to_ptr(octeon_port.mapbase); + octeon_port.serial_in = octeon_serial_in; + octeon_port.serial_out = octeon_serial_out; +#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL + octeon_port.line = 0; +#else + octeon_port.line = octeon_uart; +#endif + octeon_port.irq = 42 + octeon_uart; + early_serial_setup(&octeon_port); + + octeon_user_io_init(); + register_smp_ops(&octeon_smp_ops); +} + +void __init plat_mem_setup(void) +{ + uint64_t mem_alloc_size; + uint64_t total; + int64_t memory; + + total = 0; + + /* First add the init memory we will be returning. */ + memory = __pa_symbol(&__init_begin) & PAGE_MASK; + mem_alloc_size = (__pa_symbol(&__init_end) & PAGE_MASK) - memory; + if (mem_alloc_size > 0) { + add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM); + total += mem_alloc_size; + } + + /* + * The Mips memory init uses the first memory location for + * some memory vectors. When SPARSEMEM is in use, it doesn't + * verify that the size is big enough for the final + * vectors. Making the smallest chuck 4MB seems to be enough + * to consistantly work. + */ + mem_alloc_size = 4 << 20; + if (mem_alloc_size > MAX_MEMORY) + mem_alloc_size = MAX_MEMORY; + + /* + * When allocating memory, we want incrementing addresses from + * bootmem_alloc so the code in add_memory_region can merge + * regions next to each other. + */ + cvmx_bootmem_lock(); + while ((boot_mem_map.nr_map < BOOT_MEM_MAP_MAX) + && (total < MAX_MEMORY)) { +#if defined(CONFIG_64BIT) || defined(CONFIG_64BIT_PHYS_ADDR) + memory = cvmx_bootmem_phy_alloc(mem_alloc_size, + __pa_symbol(&__init_end), -1, + 0x100000, + CVMX_BOOTMEM_FLAG_NO_LOCKING); +#elif defined(CONFIG_HIGHMEM) + memory = cvmx_bootmem_phy_alloc(mem_alloc_size, 0, 1ull << 31, + 0x100000, + CVMX_BOOTMEM_FLAG_NO_LOCKING); +#else + memory = cvmx_bootmem_phy_alloc(mem_alloc_size, 0, 512 << 20, + 0x100000, + CVMX_BOOTMEM_FLAG_NO_LOCKING); +#endif + if (memory >= 0) { + /* + * This function automatically merges address + * regions next to each other if they are + * received in incrementing order. + */ + add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM); + total += mem_alloc_size; + } else { + break; + } + } + cvmx_bootmem_unlock(); + +#ifdef CONFIG_CAVIUM_RESERVE32 + /* + * Now that we've allocated the kernel memory it is safe to + * free the reserved region. We free it here so that builtin + * drivers can use the memory. + */ + if (octeon_reserve32_memory) + cvmx_bootmem_free_named("CAVIUM_RESERVE32"); +#endif /* CONFIG_CAVIUM_RESERVE32 */ + + if (total == 0) + panic("Unable to allocate memory from " + "cvmx_bootmem_phy_alloc\n"); +} + + +int prom_putchar(char c) +{ + uint64_t lsrval; + + /* Spin until there is room */ + do { + lsrval = cvmx_read_csr(CVMX_MIO_UARTX_LSR(octeon_uart)); + } while ((lsrval & 0x20) == 0); + + /* Write the byte */ + cvmx_write_csr(CVMX_MIO_UARTX_THR(octeon_uart), c); + return 1; +} + +void prom_free_prom_memory(void) +{ +#ifdef CONFIG_CAVIUM_DECODE_RSL + cvmx_interrupt_rsl_enable(); + + /* Add an interrupt handler for general failures. */ + if (request_irq(OCTEON_IRQ_RML, octeon_rlm_interrupt, IRQF_SHARED, + "RML/RSL", octeon_rlm_interrupt)) { + panic("Unable to request_irq(OCTEON_IRQ_RML)\n"); + } +#endif + + /* This call is here so that it is performed after any TLB + initializations. It needs to be after these in case the + CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB option is set */ + octeon_hal_setup_reserved32(); +} + +static struct octeon_cf_data octeon_cf_data; + +static int __init octeon_cf_device_init(void) +{ + union cvmx_mio_boot_reg_cfgx mio_boot_reg_cfg; + unsigned long base_ptr, region_base, region_size; + struct platform_device *pd; + struct resource cf_resources[3]; + unsigned int num_resources; + int i; + int ret = 0; + + /* Setup octeon-cf platform device if present. */ + base_ptr = 0; + if (octeon_bootinfo->major_version == 1 + && octeon_bootinfo->minor_version >= 1) { + if (octeon_bootinfo->compact_flash_common_base_addr) + base_ptr = + octeon_bootinfo->compact_flash_common_base_addr; + } else { + base_ptr = 0x1d000800; + } + + if (!base_ptr) + return ret; + + /* Find CS0 region. */ + for (i = 0; i < 8; i++) { + mio_boot_reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(i)); + region_base = mio_boot_reg_cfg.s.base << 16; + region_size = (mio_boot_reg_cfg.s.size + 1) << 16; + if (mio_boot_reg_cfg.s.en && base_ptr >= region_base + && base_ptr < region_base + region_size) + break; + } + if (i >= 7) { + /* i and i + 1 are CS0 and CS1, both must be less than 8. */ + goto out; + } + octeon_cf_data.base_region = i; + octeon_cf_data.is16bit = mio_boot_reg_cfg.s.width; + octeon_cf_data.base_region_bias = base_ptr - region_base; + memset(cf_resources, 0, sizeof(cf_resources)); + num_resources = 0; + cf_resources[num_resources].flags = IORESOURCE_MEM; + cf_resources[num_resources].start = region_base; + cf_resources[num_resources].end = region_base + region_size - 1; + num_resources++; + + + if (!(base_ptr & 0xfffful)) { + /* + * Boot loader signals availability of DMA (true_ide + * mode) by setting low order bits of base_ptr to + * zero. + */ + + /* Asume that CS1 immediately follows. */ + mio_boot_reg_cfg.u64 = + cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(i + 1)); + region_base = mio_boot_reg_cfg.s.base << 16; + region_size = (mio_boot_reg_cfg.s.size + 1) << 16; + if (!mio_boot_reg_cfg.s.en) + goto out; + + cf_resources[num_resources].flags = IORESOURCE_MEM; + cf_resources[num_resources].start = region_base; + cf_resources[num_resources].end = region_base + region_size - 1; + num_resources++; + + octeon_cf_data.dma_engine = 0; + cf_resources[num_resources].flags = IORESOURCE_IRQ; + cf_resources[num_resources].start = OCTEON_IRQ_BOOTDMA; + cf_resources[num_resources].end = OCTEON_IRQ_BOOTDMA; + num_resources++; + } else { + octeon_cf_data.dma_engine = -1; + } + + pd = platform_device_alloc("pata_octeon_cf", -1); + if (!pd) { + ret = -ENOMEM; + goto out; + } + pd->dev.platform_data = &octeon_cf_data; + + ret = platform_device_add_resources(pd, cf_resources, num_resources); + if (ret) + goto fail; + + ret = platform_device_add(pd); + if (ret) + goto fail; + + return ret; +fail: + platform_device_put(pd); +out: + return ret; +} +device_initcall(octeon_cf_device_init); diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c new file mode 100644 index 000000000000..24e0ad63980a --- /dev/null +++ b/arch/mips/cavium-octeon/smp.c @@ -0,0 +1,211 @@ +/* + * 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. + * + * Copyright (C) 2004-2008 Cavium Networks + */ +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/smp.h> +#include <linux/interrupt.h> +#include <linux/kernel_stat.h> +#include <linux/sched.h> +#include <linux/module.h> + +#include <asm/mmu_context.h> +#include <asm/system.h> +#include <asm/time.h> + +#include <asm/octeon/octeon.h> + +volatile unsigned long octeon_processor_boot = 0xff; +volatile unsigned long octeon_processor_sp; +volatile unsigned long octeon_processor_gp; + +static irqreturn_t mailbox_interrupt(int irq, void *dev_id) +{ + const int coreid = cvmx_get_core_num(); + uint64_t action; + + /* Load the mailbox register to figure out what we're supposed to do */ + action = cvmx_read_csr(CVMX_CIU_MBOX_CLRX(coreid)); + + /* Clear the mailbox to clear the interrupt */ + cvmx_write_csr(CVMX_CIU_MBOX_CLRX(coreid), action); + + if (action & SMP_CALL_FUNCTION) + smp_call_function_interrupt(); + + /* Check if we've been told to flush the icache */ + if (action & SMP_ICACHE_FLUSH) + asm volatile ("synci 0($0)\n"); + return IRQ_HANDLED; +} + +/** + * Cause the function described by call_data to be executed on the passed + * cpu. When the function has finished, increment the finished field of + * call_data. + */ +void octeon_send_ipi_single(int cpu, unsigned int action) +{ + int coreid = cpu_logical_map(cpu); + /* + pr_info("SMP: Mailbox send cpu=%d, coreid=%d, action=%u\n", cpu, + coreid, action); + */ + cvmx_write_csr(CVMX_CIU_MBOX_SETX(coreid), action); +} + +static inline void octeon_send_ipi_mask(cpumask_t mask, unsigned int action) +{ + unsigned int i; + + for_each_cpu_mask(i, mask) + octeon_send_ipi_single(i, action); +} + +/** + * Detect available CPUs, populate phys_cpu_present_map + */ +static void octeon_smp_setup(void) +{ + const int coreid = cvmx_get_core_num(); + int cpus; + int id; + + int core_mask = octeon_get_boot_coremask(); + + cpus_clear(cpu_possible_map); + __cpu_number_map[coreid] = 0; + __cpu_logical_map[0] = coreid; + cpu_set(0, cpu_possible_map); + + cpus = 1; + for (id = 0; id < 16; id++) { + if ((id != coreid) && (core_mask & (1 << id))) { + cpu_set(cpus, cpu_possible_map); + __cpu_number_map[id] = cpus; + __cpu_logical_map[cpus] = id; + cpus++; + } + } +} + +/** + * Firmware CPU startup hook + * + */ +static void octeon_boot_secondary(int cpu, struct task_struct *idle) +{ + int count; + + pr_info("SMP: Booting CPU%02d (CoreId %2d)...\n", cpu, + cpu_logical_map(cpu)); + + octeon_processor_sp = __KSTK_TOS(idle); + octeon_processor_gp = (unsigned long)(task_thread_info(idle)); + octeon_processor_boot = cpu_logical_map(cpu); + mb(); + + count = 10000; + while (octeon_processor_sp && count) { + /* Waiting for processor to get the SP and GP */ + udelay(1); + count--; + } + if (count == 0) + pr_err("Secondary boot timeout\n"); +} + +/** + * After we've done initial boot, this function is called to allow the + * board code to clean up state, if needed + */ +static void octeon_init_secondary(void) +{ + const int coreid = cvmx_get_core_num(); + union cvmx_ciu_intx_sum0 interrupt_enable; + + octeon_check_cpu_bist(); + octeon_init_cvmcount(); + /* + pr_info("SMP: CPU%d (CoreId %lu) started\n", cpu, coreid); + */ + /* Enable Mailbox interrupts to this core. These are the only + interrupts allowed on line 3 */ + cvmx_write_csr(CVMX_CIU_MBOX_CLRX(coreid), 0xffffffff); + interrupt_enable.u64 = 0; + interrupt_enable.s.mbox = 0x3; + cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), interrupt_enable.u64); + cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0); + cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0); + cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0); + /* Enable core interrupt processing for 2,3 and 7 */ + set_c0_status(0x8c01); +} + +/** + * Callout to firmware before smp_init + * + */ +void octeon_prepare_cpus(unsigned int max_cpus) +{ + cvmx_write_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()), 0xffffffff); + if (request_irq(OCTEON_IRQ_MBOX0, mailbox_interrupt, IRQF_SHARED, + "mailbox0", mailbox_interrupt)) { + panic("Cannot request_irq(OCTEON_IRQ_MBOX0)\n"); + } + if (request_irq(OCTEON_IRQ_MBOX1, mailbox_interrupt, IRQF_SHARED, + "mailbox1", mailbox_interrupt)) { + panic("Cannot request_irq(OCTEON_IRQ_MBOX1)\n"); + } +} + +/** + * Last chance for the board code to finish SMP initialization before + * the CPU is "online". + */ +static void octeon_smp_finish(void) +{ +#ifdef CONFIG_CAVIUM_GDB + unsigned long tmp; + /* Pulse MCD0 signal on Ctrl-C to stop all the cores. Also set the MCD0 + to be not masked by this core so we know the signal is received by + someone */ + asm volatile ("dmfc0 %0, $22\n" + "ori %0, %0, 0x9100\n" "dmtc0 %0, $22\n" : "=r" (tmp)); +#endif + + octeon_user_io_init(); + + /* to generate the first CPU timer interrupt */ + write_c0_compare(read_c0_count() + mips_hpt_frequency / HZ); +} + +/** + * Hook for after all CPUs are online + */ +static void octeon_cpus_done(void) +{ +#ifdef CONFIG_CAVIUM_GDB + unsigned long tmp; + /* Pulse MCD0 signal on Ctrl-C to stop all the cores. Also set the MCD0 + to be not masked by this core so we know the signal is received by + someone */ + asm volatile ("dmfc0 %0, $22\n" + "ori %0, %0, 0x9100\n" "dmtc0 %0, $22\n" : "=r" (tmp)); +#endif +} + +struct plat_smp_ops octeon_smp_ops = { + .send_ipi_single = octeon_send_ipi_single, + .send_ipi_mask = octeon_send_ipi_mask, + .init_secondary = octeon_init_secondary, + .smp_finish = octeon_smp_finish, + .cpus_done = octeon_cpus_done, + .boot_secondary = octeon_boot_secondary, + .smp_setup = octeon_smp_setup, + .prepare_cpus = octeon_prepare_cpus, +}; diff --git a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h new file mode 100644 index 000000000000..04ce6e6569da --- /dev/null +++ b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h @@ -0,0 +1,78 @@ +/* + * 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. + * + * Copyright (C) 2004 Cavium Networks + */ +#ifndef __ASM_MACH_CAVIUM_OCTEON_CPU_FEATURE_OVERRIDES_H +#define __ASM_MACH_CAVIUM_OCTEON_CPU_FEATURE_OVERRIDES_H + +#include <linux/types.h> +#include <asm/mipsregs.h> + +/* + * Cavium Octeons are MIPS64v2 processors + */ +#define cpu_dcache_line_size() 128 +#define cpu_icache_line_size() 128 + + +#define cpu_has_4kex 1 +#define cpu_has_3k_cache 0 +#define cpu_has_4k_cache 0 +#define cpu_has_tx39_cache 0 +#define cpu_has_fpu 0 +#define cpu_has_counter 1 +#define cpu_has_watch 1 +#define cpu_has_divec 1 +#define cpu_has_vce 0 +#define cpu_has_cache_cdex_p 0 +#define cpu_has_cache_cdex_s 0 +#define cpu_has_prefetch 1 + +/* + * We should disable LL/SC on non SMP systems as it is faster to + * disable interrupts for atomic access than a LL/SC. Unfortunatly we + * cannot as this breaks asm/futex.h + */ +#define cpu_has_llsc 1 +#define cpu_has_vtag_icache 1 +#define cpu_has_dc_aliases 0 +#define cpu_has_ic_fills_f_dc 0 +#define cpu_has_64bits 1 +#define cpu_has_octeon_cache 1 +#define cpu_has_saa octeon_has_saa() +#define cpu_has_mips32r1 0 +#define cpu_has_mips32r2 0 +#define cpu_has_mips64r1 0 +#define cpu_has_mips64r2 1 +#define cpu_has_dsp 0 +#define cpu_has_mipsmt 0 +#define cpu_has_userlocal 0 +#define cpu_has_vint 0 +#define cpu_has_veic 0 +#define ARCH_HAS_READ_CURRENT_TIMER 1 +#define ARCH_HAS_IRQ_PER_CPU 1 +#define ARCH_HAS_SPINLOCK_PREFETCH 1 +#define spin_lock_prefetch(x) prefetch(x) +#define PREFETCH_STRIDE 128 + +static inline int read_current_timer(unsigned long *result) +{ + asm volatile ("rdhwr %0,$31\n" +#ifndef CONFIG_64BIT + "\tsll %0, 0" +#endif + : "=r" (*result)); + return 0; +} + +static inline int octeon_has_saa(void) +{ + int id; + asm volatile ("mfc0 %0, $15,0" : "=r" (id)); + return id >= 0x000d0300; +} + +#endif diff --git a/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h b/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h new file mode 100644 index 000000000000..f30fce92aabb --- /dev/null +++ b/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h @@ -0,0 +1,64 @@ +/* + * 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. + * + * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org> + * + * + * Similar to mach-generic/dma-coherence.h except + * plat_device_is_coherent hard coded to return 1. + * + */ +#ifndef __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H +#define __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H + +struct device; + +dma_addr_t octeon_map_dma_mem(struct device *, void *, size_t); +void octeon_unmap_dma_mem(struct device *, dma_addr_t); + +static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, + size_t size) +{ + return octeon_map_dma_mem(dev, addr, size); +} + +static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, + struct page *page) +{ + return octeon_map_dma_mem(dev, page_address(page), PAGE_SIZE); +} + +static inline unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr) +{ + return dma_addr; +} + +static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr) +{ + octeon_unmap_dma_mem(dev, dma_addr); +} + +static inline int plat_dma_supported(struct device *dev, u64 mask) +{ + return 1; +} + +static inline void plat_extra_sync_for_device(struct device *dev) +{ + mb(); +} + +static inline int plat_device_is_coherent(struct device *dev) +{ + return 1; +} + +static inline int plat_dma_mapping_error(struct device *dev, + dma_addr_t dma_addr) +{ + return dma_addr == -1; +} + +#endif /* __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H */ diff --git a/arch/mips/include/asm/mach-cavium-octeon/irq.h b/arch/mips/include/asm/mach-cavium-octeon/irq.h new file mode 100644 index 000000000000..d32220fbf4f1 --- /dev/null +++ b/arch/mips/include/asm/mach-cavium-octeon/irq.h @@ -0,0 +1,244 @@ +/* + * 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. + * + * Copyright (C) 2004-2008 Cavium Networks + */ +#ifndef __OCTEON_IRQ_H__ +#define __OCTEON_IRQ_H__ + +#define NR_IRQS OCTEON_IRQ_LAST +#define MIPS_CPU_IRQ_BASE OCTEON_IRQ_SW0 + +/* 0 - 7 represent the i8259 master */ +#define OCTEON_IRQ_I8259M0 0 +#define OCTEON_IRQ_I8259M1 1 +#define OCTEON_IRQ_I8259M2 2 +#define OCTEON_IRQ_I8259M3 3 +#define OCTEON_IRQ_I8259M4 4 +#define OCTEON_IRQ_I8259M5 5 +#define OCTEON_IRQ_I8259M6 6 +#define OCTEON_IRQ_I8259M7 7 +/* 8 - 15 represent the i8259 slave */ +#define OCTEON_IRQ_I8259S0 8 +#define OCTEON_IRQ_I8259S1 9 +#define OCTEON_IRQ_I8259S2 10 +#define OCTEON_IRQ_I8259S3 11 +#define OCTEON_IRQ_I8259S4 12 +#define OCTEON_IRQ_I8259S5 13 +#define OCTEON_IRQ_I8259S6 14 +#define OCTEON_IRQ_I8259S7 15 +/* 16 - 23 represent the 8 MIPS standard interrupt sources */ +#define OCTEON_IRQ_SW0 16 +#define OCTEON_IRQ_SW1 17 +#define OCTEON_IRQ_CIU0 18 +#define OCTEON_IRQ_CIU1 19 +#define OCTEON_IRQ_CIU4 20 +#define OCTEON_IRQ_5 21 +#define OCTEON_IRQ_PERF 22 +#define OCTEON_IRQ_TIMER 23 +/* 24 - 87 represent the sources in CIU_INTX_EN0 */ +#define OCTEON_IRQ_WORKQ0 24 +#define OCTEON_IRQ_WORKQ1 25 +#define OCTEON_IRQ_WORKQ2 26 +#define OCTEON_IRQ_WORKQ3 27 +#define OCTEON_IRQ_WORKQ4 28 +#define OCTEON_IRQ_WORKQ5 29 +#define OCTEON_IRQ_WORKQ6 30 +#define OCTEON_IRQ_WORKQ7 31 +#define OCTEON_IRQ_WORKQ8 32 +#define OCTEON_IRQ_WORKQ9 33 +#define OCTEON_IRQ_WORKQ10 34 +#define OCTEON_IRQ_WORKQ11 35 +#define OCTEON_IRQ_WORKQ12 36 +#define OCTEON_IRQ_WORKQ13 37 +#define OCTEON_IRQ_WORKQ14 38 +#define OCTEON_IRQ_WORKQ15 39 +#define OCTEON_IRQ_GPIO0 40 +#define OCTEON_IRQ_GPIO1 41 +#define OCTEON_IRQ_GPIO2 42 +#define OCTEON_IRQ_GPIO3 43 +#define OCTEON_IRQ_GPIO4 44 +#define OCTEON_IRQ_GPIO5 45 +#define OCTEON_IRQ_GPIO6 46 +#define OCTEON_IRQ_GPIO7 47 +#define OCTEON_IRQ_GPIO8 48 +#define OCTEON_IRQ_GPIO9 49 +#define OCTEON_IRQ_GPIO10 50 +#define OCTEON_IRQ_GPIO11 51 +#define OCTEON_IRQ_GPIO12 52 +#define OCTEON_IRQ_GPIO13 53 +#define OCTEON_IRQ_GPIO14 54 +#define OCTEON_IRQ_GPIO15 55 +#define OCTEON_IRQ_MBOX0 56 +#define OCTEON_IRQ_MBOX1 57 +#define OCTEON_IRQ_UART0 58 +#define OCTEON_IRQ_UART1 59 +#define OCTEON_IRQ_PCI_INT0 60 +#define OCTEON_IRQ_PCI_INT1 61 +#define OCTEON_IRQ_PCI_INT2 62 +#define OCTEON_IRQ_PCI_INT3 63 +#define OCTEON_IRQ_PCI_MSI0 64 +#define OCTEON_IRQ_PCI_MSI1 65 +#define OCTEON_IRQ_PCI_MSI2 66 +#define OCTEON_IRQ_PCI_MSI3 67 +#define OCTEON_IRQ_RESERVED68 68 /* Summary of CIU_INT_SUM1 */ +#define OCTEON_IRQ_TWSI 69 +#define OCTEON_IRQ_RML 70 +#define OCTEON_IRQ_TRACE 71 +#define OCTEON_IRQ_GMX_DRP0 72 +#define OCTEON_IRQ_GMX_DRP1 73 +#define OCTEON_IRQ_IPD_DRP 74 +#define OCTEON_IRQ_KEY_ZERO 75 +#define OCTEON_IRQ_TIMER0 76 +#define OCTEON_IRQ_TIMER1 77 +#define OCTEON_IRQ_TIMER2 78 +#define OCTEON_IRQ_TIMER3 79 +#define OCTEON_IRQ_USB0 80 +#define OCTEON_IRQ_PCM 81 +#define OCTEON_IRQ_MPI 82 +#define OCTEON_IRQ_TWSI2 83 +#define OCTEON_IRQ_POWIQ 84 +#define OCTEON_IRQ_IPDPPTHR 85 +#define OCTEON_IRQ_MII0 86 +#define OCTEON_IRQ_BOOTDMA 87 +/* 88 - 151 represent the sources in CIU_INTX_EN1 */ +#define OCTEON_IRQ_WDOG0 88 +#define OCTEON_IRQ_WDOG1 89 +#define OCTEON_IRQ_WDOG2 90 +#define OCTEON_IRQ_WDOG3 91 +#define OCTEON_IRQ_WDOG4 92 +#define OCTEON_IRQ_WDOG5 93 +#define OCTEON_IRQ_WDOG6 94 +#define OCTEON_IRQ_WDOG7 95 +#define OCTEON_IRQ_WDOG8 96 +#define OCTEON_IRQ_WDOG9 97 +#define OCTEON_IRQ_WDOG10 98 +#define OCTEON_IRQ_WDOG11 99 +#define OCTEON_IRQ_WDOG12 100 +#define OCTEON_IRQ_WDOG13 101 +#define OCTEON_IRQ_WDOG14 102 +#define OCTEON_IRQ_WDOG15 103 +#define OCTEON_IRQ_UART2 104 +#define OCTEON_IRQ_USB1 105 +#define OCTEON_IRQ_MII1 106 +#define OCTEON_IRQ_RESERVED107 107 +#define OCTEON_IRQ_RESERVED108 108 +#define OCTEON_IRQ_RESERVED109 109 +#define OCTEON_IRQ_RESERVED110 110 +#define OCTEON_IRQ_RESERVED111 111 +#define OCTEON_IRQ_RESERVED112 112 +#define OCTEON_IRQ_RESERVED113 113 +#define OCTEON_IRQ_RESERVED114 114 +#define OCTEON_IRQ_RESERVED115 115 +#define OCTEON_IRQ_RESERVED116 116 +#define OCTEON_IRQ_RESERVED117 117 +#define OCTEON_IRQ_RESERVED118 118 +#define OCTEON_IRQ_RESERVED119 119 +#define OCTEON_IRQ_RESERVED120 120 +#define OCTEON_IRQ_RESERVED121 121 +#define OCTEON_IRQ_RESERVED122 122 +#define OCTEON_IRQ_RESERVED123 123 +#define OCTEON_IRQ_RESERVED124 124 +#define OCTEON_IRQ_RESERVED125 125 +#define OCTEON_IRQ_RESERVED126 126 +#define OCTEON_IRQ_RESERVED127 127 +#define OCTEON_IRQ_RESERVED128 128 +#define OCTEON_IRQ_RESERVED129 129 +#define OCTEON_IRQ_RESERVED130 130 +#define OCTEON_IRQ_RESERVED131 131 +#define OCTEON_IRQ_RESERVED132 132 +#define OCTEON_IRQ_RESERVED133 133 +#define OCTEON_IRQ_RESERVED134 134 +#define OCTEON_IRQ_RESERVED135 135 +#define OCTEON_IRQ_RESERVED136 136 +#define OCTEON_IRQ_RESERVED137 137 +#define OCTEON_IRQ_RESERVED138 138 +#define OCTEON_IRQ_RESERVED139 139 +#define OCTEON_IRQ_RESERVED140 140 +#define OCTEON_IRQ_RESERVED141 141 +#define OCTEON_IRQ_RESERVED142 142 +#define OCTEON_IRQ_RESERVED143 143 +#define OCTEON_IRQ_RESERVED144 144 +#define OCTEON_IRQ_RESERVED145 145 +#define OCTEON_IRQ_RESERVED146 146 +#define OCTEON_IRQ_RESERVED147 147 +#define OCTEON_IRQ_RESERVED148 148 +#define OCTEON_IRQ_RESERVED149 149 +#define OCTEON_IRQ_RESERVED150 150 +#define OCTEON_IRQ_RESERVED151 151 + +#ifdef CONFIG_PCI_MSI +/* 152 - 215 represent the MSI interrupts 0-63 */ +#define OCTEON_IRQ_MSI_BIT0 152 +#define OCTEON_IRQ_MSI_BIT1 153 +#define OCTEON_IRQ_MSI_BIT2 154 +#define OCTEON_IRQ_MSI_BIT3 155 +#define OCTEON_IRQ_MSI_BIT4 156 +#define OCTEON_IRQ_MSI_BIT5 157 +#define OCTEON_IRQ_MSI_BIT6 158 +#define OCTEON_IRQ_MSI_BIT7 159 +#define OCTEON_IRQ_MSI_BIT8 160 +#define OCTEON_IRQ_MSI_BIT9 161 +#define OCTEON_IRQ_MSI_BIT10 162 +#define OCTEON_IRQ_MSI_BIT11 163 +#define OCTEON_IRQ_MSI_BIT12 164 +#define OCTEON_IRQ_MSI_BIT13 165 +#define OCTEON_IRQ_MSI_BIT14 166 +#define OCTEON_IRQ_MSI_BIT15 167 +#define OCTEON_IRQ_MSI_BIT16 168 +#define OCTEON_IRQ_MSI_BIT17 169 +#define OCTEON_IRQ_MSI_BIT18 170 +#define OCTEON_IRQ_MSI_BIT19 171 +#define OCTEON_IRQ_MSI_BIT20 172 +#define OCTEON_IRQ_MSI_BIT21 173 +#define OCTEON_IRQ_MSI_BIT22 174 +#define OCTEON_IRQ_MSI_BIT23 175 +#define OCTEON_IRQ_MSI_BIT24 176 +#define OCTEON_IRQ_MSI_BIT25 177 +#define OCTEON_IRQ_MSI_BIT26 178 +#define OCTEON_IRQ_MSI_BIT27 179 +#define OCTEON_IRQ_MSI_BIT28 180 +#define OCTEON_IRQ_MSI_BIT29 181 +#define OCTEON_IRQ_MSI_BIT30 182 +#define OCTEON_IRQ_MSI_BIT31 183 +#define OCTEON_IRQ_MSI_BIT32 184 +#define OCTEON_IRQ_MSI_BIT33 185 +#define OCTEON_IRQ_MSI_BIT34 186 +#define OCTEON_IRQ_MSI_BIT35 187 +#define OCTEON_IRQ_MSI_BIT36 188 +#define OCTEON_IRQ_MSI_BIT37 189 +#define OCTEON_IRQ_MSI_BIT38 190 +#define OCTEON_IRQ_MSI_BIT39 191 +#define OCTEON_IRQ_MSI_BIT40 192 +#define OCTEON_IRQ_MSI_BIT41 193 +#define OCTEON_IRQ_MSI_BIT42 194 +#define OCTEON_IRQ_MSI_BIT43 195 +#define OCTEON_IRQ_MSI_BIT44 196 +#define OCTEON_IRQ_MSI_BIT45 197 +#define OCTEON_IRQ_MSI_BIT46 198 +#define OCTEON_IRQ_MSI_BIT47 199 +#define OCTEON_IRQ_MSI_BIT48 200 +#define OCTEON_IRQ_MSI_BIT49 201 +#define OCTEON_IRQ_MSI_BIT50 202 +#define OCTEON_IRQ_MSI_BIT51 203 +#define OCTEON_IRQ_MSI_BIT52 204 +#define OCTEON_IRQ_MSI_BIT53 205 +#define OCTEON_IRQ_MSI_BIT54 206 +#define OCTEON_IRQ_MSI_BIT55 207 +#define OCTEON_IRQ_MSI_BIT56 208 +#define OCTEON_IRQ_MSI_BIT57 209 +#define OCTEON_IRQ_MSI_BIT58 210 +#define OCTEON_IRQ_MSI_BIT59 211 +#define OCTEON_IRQ_MSI_BIT60 212 +#define OCTEON_IRQ_MSI_BIT61 213 +#define OCTEON_IRQ_MSI_BIT62 214 +#define OCTEON_IRQ_MSI_BIT63 215 + +#define OCTEON_IRQ_LAST 216 +#else +#define OCTEON_IRQ_LAST 152 +#endif + +#endif diff --git a/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h b/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h new file mode 100644 index 000000000000..0b2b5eb22e9b --- /dev/null +++ b/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h @@ -0,0 +1,131 @@ +/* + * 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. + * + * Copyright (C) 2005-2008 Cavium Networks, Inc + */ +#ifndef __ASM_MACH_CAVIUM_OCTEON_KERNEL_ENTRY_H +#define __ASM_MACH_CAVIUM_OCTEON_KERNEL_ENTRY_H + + +#define CP0_CYCLE_COUNTER $9, 6 +#define CP0_CVMCTL_REG $9, 7 +#define CP0_CVMMEMCTL_REG $11,7 +#define CP0_PRID_REG $15, 0 +#define CP0_PRID_OCTEON_PASS1 0x000d0000 +#define CP0_PRID_OCTEON_CN30XX 0x000d0200 + +.macro kernel_entry_setup + # Registers set by bootloader: + # (only 32 bits set by bootloader, all addresses are physical + # addresses, and need to have the appropriate memory region set + # by the kernel + # a0 = argc + # a1 = argv (kseg0 compat addr) + # a2 = 1 if init core, zero otherwise + # a3 = address of boot descriptor block + .set push + .set arch=octeon + # Read the cavium mem control register + dmfc0 v0, CP0_CVMMEMCTL_REG + # Clear the lower 6 bits, the CVMSEG size + dins v0, $0, 0, 6 + ori v0, CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE + dmtc0 v0, CP0_CVMMEMCTL_REG # Write the cavium mem control register + dmfc0 v0, CP0_CVMCTL_REG # Read the cavium control register +#ifdef CONFIG_CAVIUM_OCTEON_HW_FIX_UNALIGNED + # Disable unaligned load/store support but leave HW fixup enabled + or v0, v0, 0x5001 + xor v0, v0, 0x1001 +#else + # Disable unaligned load/store and HW fixup support + or v0, v0, 0x5001 + xor v0, v0, 0x5001 +#endif + # Read the processor ID register + mfc0 v1, CP0_PRID_REG + # Disable instruction prefetching (Octeon Pass1 errata) + or v0, v0, 0x2000 + # Skip reenable of prefetching for Octeon Pass1 + beq v1, CP0_PRID_OCTEON_PASS1, skip + nop + # Reenable instruction prefetching, not on Pass1 + xor v0, v0, 0x2000 + # Strip off pass number off of processor id + srl v1, 8 + sll v1, 8 + # CN30XX needs some extra stuff turned off for better performance + bne v1, CP0_PRID_OCTEON_CN30XX, skip + nop + # CN30XX Use random Icache replacement + or v0, v0, 0x400 + # CN30XX Disable instruction prefetching + or v0, v0, 0x2000 +skip: + # Write the cavium control register + dmtc0 v0, CP0_CVMCTL_REG + sync + # Flush dcache after config change + cache 9, 0($0) + # Get my core id + rdhwr v0, $0 + # Jump the master to kernel_entry + bne a2, zero, octeon_main_processor + nop + +#ifdef CONFIG_SMP + + # + # All cores other than the master need to wait here for SMP bootstrap + # to begin + # + + # This is the variable where the next core to boot os stored + PTR_LA t0, octeon_processor_boot +octeon_spin_wait_boot: + # Get the core id of the next to be booted + LONG_L t1, (t0) + # Keep looping if it isn't me + bne t1, v0, octeon_spin_wait_boot + nop + # Get my GP from the global variable + PTR_LA t0, octeon_processor_gp + LONG_L gp, (t0) + # Get my SP from the global variable + PTR_LA t0, octeon_processor_sp + LONG_L sp, (t0) + # Set the SP global variable to zero so the master knows we've started + LONG_S zero, (t0) +#ifdef __OCTEON__ + syncw + syncw +#else + sync +#endif + # Jump to the normal Linux SMP entry point + j smp_bootstrap + nop +#else /* CONFIG_SMP */ + + # + # Someone tried to boot SMP with a non SMP kernel. All extra cores + # will halt here. + # +octeon_wait_forever: + wait + b octeon_wait_forever + nop + +#endif /* CONFIG_SMP */ +octeon_main_processor: + .set pop +.endm + +/* + * Do SMP slave processor setup necessary before we can savely execute C code. + */ + .macro smp_slave_setup + .endm + +#endif /* __ASM_MACH_CAVIUM_OCTEON_KERNEL_ENTRY_H */ diff --git a/arch/mips/include/asm/mach-cavium-octeon/war.h b/arch/mips/include/asm/mach-cavium-octeon/war.h new file mode 100644 index 000000000000..c4712d7cc81d --- /dev/null +++ b/arch/mips/include/asm/mach-cavium-octeon/war.h @@ -0,0 +1,26 @@ +/* + * 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. + * + * Copyright (C) 2002, 2004, 2007 by Ralf Baechle <ralf@linux-mips.org> + * Copyright (C) 2008 Cavium Networks <support@caviumnetworks.com> + */ +#ifndef __ASM_MIPS_MACH_CAVIUM_OCTEON_WAR_H +#define __ASM_MIPS_MACH_CAVIUM_OCTEON_WAR_H + +#define R4600_V1_INDEX_ICACHEOP_WAR 0 +#define R4600_V1_HIT_CACHEOP_WAR 0 +#define R4600_V2_HIT_CACHEOP_WAR 0 +#define R5432_CP0_INTERRUPT_WAR 0 +#define BCM1250_M3_WAR 0 +#define SIBYTE_1956_WAR 0 +#define MIPS4K_ICACHE_REFILL_WAR 0 +#define MIPS_CACHE_SYNC_WAR 0 +#define TX49XX_ICACHE_INDEX_INV_WAR 0 +#define RM9000_CDEX_SMP_WAR 0 +#define ICACHE_REFILLS_WORKAROUND_WAR 0 +#define R10000_LLSC_WAR 0 +#define MIPS34K_MISSED_ITLB_WAR 0 + +#endif /* __ASM_MIPS_MACH_CAVIUM_OCTEON_WAR_H */ diff --git a/arch/mips/include/asm/octeon/octeon.h b/arch/mips/include/asm/octeon/octeon.h new file mode 100644 index 000000000000..edc676084cda --- /dev/null +++ b/arch/mips/include/asm/octeon/octeon.h @@ -0,0 +1,248 @@ +/* + * 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. + * + * Copyright (C) 2004-2008 Cavium Networks + */ +#ifndef __ASM_OCTEON_OCTEON_H +#define __ASM_OCTEON_OCTEON_H + +#include "cvmx.h" + +extern uint64_t octeon_bootmem_alloc_range_phys(uint64_t size, + uint64_t alignment, + uint64_t min_addr, + uint64_t max_addr, + int do_locking); +extern void *octeon_bootmem_alloc(uint64_t size, uint64_t alignment, + int do_locking); +extern void *octeon_bootmem_alloc_range(uint64_t size, uint64_t alignment, + uint64_t min_addr, uint64_t max_addr, + int do_locking); +extern void *octeon_bootmem_alloc_named(uint64_t size, uint64_t alignment, + char *name); +extern void *octeon_bootmem_alloc_named_range(uint64_t size, uint64_t min_addr, + uint64_t max_addr, uint64_t align, + char *name); +extern void *octeon_bootmem_alloc_named_address(uint64_t size, uint64_t address, + char *name); +extern int octeon_bootmem_free_named(char *name); +extern void octeon_bootmem_lock(void); +extern void octeon_bootmem_unlock(void); + +extern int octeon_is_simulation(void); +extern int octeon_is_pci_host(void); +extern int octeon_usb_is_ref_clk(void); +extern uint64_t octeon_get_clock_rate(void); +extern const char *octeon_board_type_string(void); +extern const char *octeon_get_pci_interrupts(void); +extern int octeon_get_southbridge_interrupt(void); +extern int octeon_get_boot_coremask(void); +extern int octeon_get_boot_num_arguments(void); +extern const char *octeon_get_boot_argument(int arg); +extern void octeon_hal_setup_reserved32(void); +extern void octeon_user_io_init(void); +struct octeon_cop2_state; +extern unsigned long octeon_crypto_enable(struct octeon_cop2_state *state); +extern void octeon_crypto_disable(struct octeon_cop2_state *state, + unsigned long flags); + +extern void octeon_init_cvmcount(void); + +#define OCTEON_ARGV_MAX_ARGS 64 +#define OCTOEN_SERIAL_LEN 20 + +struct octeon_boot_descriptor { + /* Start of block referenced by assembly code - do not change! */ + uint32_t desc_version; + uint32_t desc_size; + uint64_t stack_top; + uint64_t heap_base; + uint64_t heap_end; + /* Only used by bootloader */ + uint64_t entry_point; + uint64_t desc_vaddr; + /* End of This block referenced by assembly code - do not change! */ + uint32_t exception_base_addr; + uint32_t stack_size; + uint32_t heap_size; + /* Argc count for application. */ + uint32_t argc; + uint32_t argv[OCTEON_ARGV_MAX_ARGS]; + +#define BOOT_FLAG_INIT_CORE (1 << 0) +#define OCTEON_BL_FLAG_DEBUG (1 << 1) +#define OCTEON_BL_FLAG_NO_MAGIC (1 << 2) + /* If set, use uart1 for console */ +#define OCTEON_BL_FLAG_CONSOLE_UART1 (1 << 3) + /* If set, use PCI console */ +#define OCTEON_BL_FLAG_CONSOLE_PCI (1 << 4) + /* Call exit on break on serial port */ +#define OCTEON_BL_FLAG_BREAK (1 << 5) + + uint32_t flags; + uint32_t core_mask; + /* DRAM size in megabyes. */ + uint32_t dram_size; + /* physical address of free memory descriptor block. */ + uint32_t phy_mem_desc_addr; + /* used to pass flags from app to debugger. */ + uint32_t debugger_flags_base_addr; + /* CPU clock speed, in hz. */ + uint32_t eclock_hz; + /* DRAM clock speed, in hz. */ + uint32_t dclock_hz; + /* SPI4 clock in hz. */ + uint32_t spi_clock_hz; + uint16_t board_type; + uint8_t board_rev_major; + uint8_t board_rev_minor; + uint16_t chip_type; + uint8_t chip_rev_major; + uint8_t chip_rev_minor; + char board_serial_number[OCTOEN_SERIAL_LEN]; + uint8_t mac_addr_base[6]; + uint8_t mac_addr_count; + uint64_t cvmx_desc_vaddr; +}; + +union octeon_cvmemctl { + uint64_t u64; + struct { + /* RO 1 = BIST fail, 0 = BIST pass */ + uint64_t tlbbist:1; + /* RO 1 = BIST fail, 0 = BIST pass */ + uint64_t l1cbist:1; + /* RO 1 = BIST fail, 0 = BIST pass */ + uint64_t l1dbist:1; + /* RO 1 = BIST fail, 0 = BIST pass */ + uint64_t dcmbist:1; + /* RO 1 = BIST fail, 0 = BIST pass */ + uint64_t ptgbist:1; + /* RO 1 = BIST fail, 0 = BIST pass */ + uint64_t wbfbist:1; + /* Reserved */ + uint64_t reserved:22; + /* R/W If set, marked write-buffer entries time out + * the same as as other entries; if clear, marked + * write-buffer entries use the maximum timeout. */ + uint64_t dismarkwblongto:1; + /* R/W If set, a merged store does not clear the + * write-buffer entry timeout state. */ + uint64_t dismrgclrwbto:1; + /* R/W Two bits that are the MSBs of the resultant + * CVMSEG LM word location for an IOBDMA. The other 8 + * bits come from the SCRADDR field of the IOBDMA. */ + uint64_t iobdmascrmsb:2; + /* R/W If set, SYNCWS and SYNCS only order marked + * stores; if clear, SYNCWS and SYNCS only order + * unmarked stores. SYNCWSMARKED has no effect when + * DISSYNCWS is set. */ + uint64_t syncwsmarked:1; + /* R/W If set, SYNCWS acts as SYNCW and SYNCS acts as + * SYNC. */ + uint64_t dissyncws:1; + /* R/W If set, no stall happens on write buffer + * full. */ + uint64_t diswbfst:1; + /* R/W If set (and SX set), supervisor-level + * loads/stores can use XKPHYS addresses with + * VA<48>==0 */ + uint64_t xkmemenas:1; + /* R/W If set (and UX set), user-level loads/stores + * can use XKPHYS addresses with VA<48>==0 */ + uint64_t xkmemenau:1; + /* R/W If set (and SX set), supervisor-level + * loads/stores can use XKPHYS addresses with + * VA<48>==1 */ + uint64_t xkioenas:1; + /* R/W If set (and UX set), user-level loads/stores + * can use XKPHYS addresses with VA<48>==1 */ + uint64_t xkioenau:1; + /* R/W If set, all stores act as SYNCW (NOMERGE must + * be set when this is set) RW, reset to 0. */ + uint64_t allsyncw:1; + /* R/W If set, no stores merge, and all stores reach + * the coherent bus in order. */ + uint64_t nomerge:1; + /* R/W Selects the bit in the counter used for DID + * time-outs 0 = 231, 1 = 230, 2 = 229, 3 = + * 214. Actual time-out is between 1x and 2x this + * interval. For example, with DIDTTO=3, expiration + * interval is between 16K and 32K. */ + uint64_t didtto:2; + /* R/W If set, the (mem) CSR clock never turns off. */ + uint64_t csrckalwys:1; + /* R/W If set, mclk never turns off. */ + uint64_t mclkalwys:1; + /* R/W Selects the bit in the counter used for write + * buffer flush time-outs (WBFLT+11) is the bit + * position in an internal counter used to determine + * expiration. The write buffer expires between 1x and + * 2x this interval. For example, with WBFLT = 0, a + * write buffer expires between 2K and 4K cycles after + * the write buffer entry is allocated. */ + uint64_t wbfltime:3; + /* R/W If set, do not put Istream in the L2 cache. */ + uint64_t istrnol2:1; + /* R/W The write buffer threshold. */ + uint64_t wbthresh:4; + /* Reserved */ + uint64_t reserved2:2; + /* R/W If set, CVMSEG is available for loads/stores in + * kernel/debug mode. */ + uint64_t cvmsegenak:1; + /* R/W If set, CVMSEG is available for loads/stores in + * supervisor mode. */ + uint64_t cvmsegenas:1; + /* R/W If set, CVMSEG is available for loads/stores in + * user mode. */ + uint64_t cvmsegenau:1; + /* R/W Size of local memory in cache blocks, 54 (6912 + * bytes) is max legal value. */ + uint64_t lmemsz:6; + } s; +}; + +struct octeon_cf_data { + unsigned long base_region_bias; + unsigned int base_region; /* The chip select region used by CF */ + int is16bit; /* 0 - 8bit, !0 - 16bit */ + int dma_engine; /* -1 for no DMA */ +}; + +extern void octeon_write_lcd(const char *s); +extern void octeon_check_cpu_bist(void); +extern int octeon_get_boot_debug_flag(void); +extern int octeon_get_boot_uart(void); + +struct uart_port; +extern unsigned int octeon_serial_in(struct uart_port *, int); +extern void octeon_serial_out(struct uart_port *, int, int); + +/** + * Write a 32bit value to the Octeon NPI register space + * + * @address: Address to write to + * @val: Value to write + */ +static inline void octeon_npi_write32(uint64_t address, uint32_t val) +{ + cvmx_write64_uint32(address ^ 4, val); + cvmx_read64_uint32(address ^ 4); +} + + +/** + * Read a 32bit value from the Octeon NPI register space + * + * @address: Address to read + * Returns The result + */ +static inline uint32_t octeon_npi_read32(uint64_t address) +{ + return cvmx_read64_uint32(address ^ 4); +} + +#endif /* __ASM_OCTEON_OCTEON_H */ diff --git a/arch/mips/kernel/octeon_switch.S b/arch/mips/kernel/octeon_switch.S new file mode 100644 index 000000000000..d52389672b06 --- /dev/null +++ b/arch/mips/kernel/octeon_switch.S @@ -0,0 +1,506 @@ +/* + * 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. + * + * Copyright (C) 1994, 1995, 1996, 1998, 1999, 2002, 2003 Ralf Baechle + * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) + * Copyright (C) 1994, 1995, 1996, by Andreas Busse + * Copyright (C) 1999 Silicon Graphics, Inc. + * Copyright (C) 2000 MIPS Technologies, Inc. + * written by Carsten Langgaard, carstenl@mips.com + */ +#include <asm/asm.h> +#include <asm/cachectl.h> +#include <asm/fpregdef.h> +#include <asm/mipsregs.h> +#include <asm/asm-offsets.h> +#include <asm/page.h> +#include <asm/pgtable-bits.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> +#include <asm/thread_info.h> + +#include <asm/asmmacro.h> + +/* + * Offset to the current process status flags, the first 32 bytes of the + * stack are not used. + */ +#define ST_OFF (_THREAD_SIZE - 32 - PT_SIZE + PT_STATUS) + +/* + * task_struct *resume(task_struct *prev, task_struct *next, + * struct thread_info *next_ti) + */ + .align 7 + LEAF(resume) + .set arch=octeon +#ifndef CONFIG_CPU_HAS_LLSC + sw zero, ll_bit +#endif + mfc0 t1, CP0_STATUS + LONG_S t1, THREAD_STATUS(a0) + cpu_save_nonscratch a0 + LONG_S ra, THREAD_REG31(a0) + + /* check if we need to save COP2 registers */ + PTR_L t2, TASK_THREAD_INFO(a0) + LONG_L t0, ST_OFF(t2) + bbit0 t0, 30, 1f + + /* Disable COP2 in the stored process state */ + li t1, ST0_CU2 + xor t0, t1 + LONG_S t0, ST_OFF(t2) + + /* Enable COP2 so we can save it */ + mfc0 t0, CP0_STATUS + or t0, t1 + mtc0 t0, CP0_STATUS + + /* Save COP2 */ + daddu a0, THREAD_CP2 + jal octeon_cop2_save + dsubu a0, THREAD_CP2 + + /* Disable COP2 now that we are done */ + mfc0 t0, CP0_STATUS + li t1, ST0_CU2 + xor t0, t1 + mtc0 t0, CP0_STATUS + +1: +#if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0 + /* Check if we need to store CVMSEG state */ + mfc0 t0, $11,7 /* CvmMemCtl */ + bbit0 t0, 6, 3f /* Is user access enabled? */ + + /* Store the CVMSEG state */ + /* Extract the size of CVMSEG */ + andi t0, 0x3f + /* Multiply * (cache line size/sizeof(long)/2) */ + sll t0, 7-LONGLOG-1 + li t1, -32768 /* Base address of CVMSEG */ + LONG_ADDI t2, a0, THREAD_CVMSEG /* Where to store CVMSEG to */ + synciobdma +2: + .set noreorder + LONG_L t8, 0(t1) /* Load from CVMSEG */ + subu t0, 1 /* Decrement loop var */ + LONG_L t9, LONGSIZE(t1)/* Load from CVMSEG */ + LONG_ADDU t1, LONGSIZE*2 /* Increment loc in CVMSEG */ + LONG_S t8, 0(t2) /* Store CVMSEG to thread storage */ + LONG_ADDU t2, LONGSIZE*2 /* Increment loc in thread storage */ + bnez t0, 2b /* Loop until we've copied it all */ + LONG_S t9, -LONGSIZE(t2)/* Store CVMSEG to thread storage */ + .set reorder + + /* Disable access to CVMSEG */ + mfc0 t0, $11,7 /* CvmMemCtl */ + xori t0, t0, 0x40 /* Bit 6 is CVMSEG user enable */ + mtc0 t0, $11,7 /* CvmMemCtl */ +#endif +3: + /* + * The order of restoring the registers takes care of the race + * updating $28, $29 and kernelsp without disabling ints. + */ + move $28, a2 + cpu_restore_nonscratch a1 + +#if (_THREAD_SIZE - 32) < 0x8000 + PTR_ADDIU t0, $28, _THREAD_SIZE - 32 +#else + PTR_LI t0, _THREAD_SIZE - 32 + PTR_ADDU t0, $28 +#endif + set_saved_sp t0, t1, t2 + + mfc0 t1, CP0_STATUS /* Do we really need this? */ + li a3, 0xff01 + and t1, a3 + LONG_L a2, THREAD_STATUS(a1) + nor a3, $0, a3 + and a2, a3 + or a2, t1 + mtc0 a2, CP0_STATUS + move v0, a0 + jr ra + END(resume) + +/* + * void octeon_cop2_save(struct octeon_cop2_state *a0) + */ + .align 7 + LEAF(octeon_cop2_save) + + dmfc0 t9, $9,7 /* CvmCtl register. */ + + /* Save the COP2 CRC state */ + dmfc2 t0, 0x0201 + dmfc2 t1, 0x0202 + dmfc2 t2, 0x0200 + sd t0, OCTEON_CP2_CRC_IV(a0) + sd t1, OCTEON_CP2_CRC_LENGTH(a0) + sd t2, OCTEON_CP2_CRC_POLY(a0) + /* Skip next instructions if CvmCtl[NODFA_CP2] set */ + bbit1 t9, 28, 1f + + /* Save the LLM state */ + dmfc2 t0, 0x0402 + dmfc2 t1, 0x040A + sd t0, OCTEON_CP2_LLM_DAT(a0) + sd t1, OCTEON_CP2_LLM_DAT+8(a0) + +1: bbit1 t9, 26, 3f /* done if CvmCtl[NOCRYPTO] set */ + + /* Save the COP2 crypto state */ + /* this part is mostly common to both pass 1 and later revisions */ + dmfc2 t0, 0x0084 + dmfc2 t1, 0x0080 + dmfc2 t2, 0x0081 + dmfc2 t3, 0x0082 + sd t0, OCTEON_CP2_3DES_IV(a0) + dmfc2 t0, 0x0088 + sd t1, OCTEON_CP2_3DES_KEY(a0) + dmfc2 t1, 0x0111 /* only necessary for pass 1 */ + sd t2, OCTEON_CP2_3DES_KEY+8(a0) + dmfc2 t2, 0x0102 + sd t3, OCTEON_CP2_3DES_KEY+16(a0) + dmfc2 t3, 0x0103 + sd t0, OCTEON_CP2_3DES_RESULT(a0) + dmfc2 t0, 0x0104 + sd t1, OCTEON_CP2_AES_INP0(a0) /* only necessary for pass 1 */ + dmfc2 t1, 0x0105 + sd t2, OCTEON_CP2_AES_IV(a0) + dmfc2 t2, 0x0106 + sd t3, OCTEON_CP2_AES_IV+8(a0) + dmfc2 t3, 0x0107 + sd t0, OCTEON_CP2_AES_KEY(a0) + dmfc2 t0, 0x0110 + sd t1, OCTEON_CP2_AES_KEY+8(a0) + dmfc2 t1, 0x0100 + sd t2, OCTEON_CP2_AES_KEY+16(a0) + dmfc2 t2, 0x0101 + sd t3, OCTEON_CP2_AES_KEY+24(a0) + mfc0 t3, $15,0 /* Get the processor ID register */ + sd t0, OCTEON_CP2_AES_KEYLEN(a0) + li t0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */ + sd t1, OCTEON_CP2_AES_RESULT(a0) + sd t2, OCTEON_CP2_AES_RESULT+8(a0) + /* Skip to the Pass1 version of the remainder of the COP2 state */ + beq t3, t0, 2f + + /* the non-pass1 state when !CvmCtl[NOCRYPTO] */ + dmfc2 t1, 0x0240 + dmfc2 t2, 0x0241 + dmfc2 t3, 0x0242 + dmfc2 t0, 0x0243 + sd t1, OCTEON_CP2_HSH_DATW(a0) + dmfc2 t1, 0x0244 + sd t2, OCTEON_CP2_HSH_DATW+8(a0) + dmfc2 t2, 0x0245 + sd t3, OCTEON_CP2_HSH_DATW+16(a0) + dmfc2 t3, 0x0246 + sd t0, OCTEON_CP2_HSH_DATW+24(a0) + dmfc2 t0, 0x0247 + sd t1, OCTEON_CP2_HSH_DATW+32(a0) + dmfc2 t1, 0x0248 + sd t2, OCTEON_CP2_HSH_DATW+40(a0) + dmfc2 t2, 0x0249 + sd t3, OCTEON_CP2_HSH_DATW+48(a0) + dmfc2 t3, 0x024A + sd t0, OCTEON_CP2_HSH_DATW+56(a0) + dmfc2 t0, 0x024B + sd t1, OCTEON_CP2_HSH_DATW+64(a0) + dmfc2 t1, 0x024C + sd t2, OCTEON_CP2_HSH_DATW+72(a0) + dmfc2 t2, 0x024D + sd t3, OCTEON_CP2_HSH_DATW+80(a0) + dmfc2 t3, 0x024E + sd t0, OCTEON_CP2_HSH_DATW+88(a0) + dmfc2 t0, 0x0250 + sd t1, OCTEON_CP2_HSH_DATW+96(a0) + dmfc2 t1, 0x0251 + sd t2, OCTEON_CP2_HSH_DATW+104(a0) + dmfc2 t2, 0x0252 + sd t3, OCTEON_CP2_HSH_DATW+112(a0) + dmfc2 t3, 0x0253 + sd t0, OCTEON_CP2_HSH_IVW(a0) + dmfc2 t0, 0x0254 + sd t1, OCTEON_CP2_HSH_IVW+8(a0) + dmfc2 t1, 0x0255 + sd t2, OCTEON_CP2_HSH_IVW+16(a0) + dmfc2 t2, 0x0256 + sd t3, OCTEON_CP2_HSH_IVW+24(a0) + dmfc2 t3, 0x0257 + sd t0, OCTEON_CP2_HSH_IVW+32(a0) + dmfc2 t0, 0x0258 + sd t1, OCTEON_CP2_HSH_IVW+40(a0) + dmfc2 t1, 0x0259 + sd t2, OCTEON_CP2_HSH_IVW+48(a0) + dmfc2 t2, 0x025E + sd t3, OCTEON_CP2_HSH_IVW+56(a0) + dmfc2 t3, 0x025A + sd t0, OCTEON_CP2_GFM_MULT(a0) + dmfc2 t0, 0x025B + sd t1, OCTEON_CP2_GFM_MULT+8(a0) + sd t2, OCTEON_CP2_GFM_POLY(a0) + sd t3, OCTEON_CP2_GFM_RESULT(a0) + sd t0, OCTEON_CP2_GFM_RESULT+8(a0) + jr ra + +2: /* pass 1 special stuff when !CvmCtl[NOCRYPTO] */ + dmfc2 t3, 0x0040 + dmfc2 t0, 0x0041 + dmfc2 t1, 0x0042 + dmfc2 t2, 0x0043 + sd t3, OCTEON_CP2_HSH_DATW(a0) + dmfc2 t3, 0x0044 + sd t0, OCTEON_CP2_HSH_DATW+8(a0) + dmfc2 t0, 0x0045 + sd t1, OCTEON_CP2_HSH_DATW+16(a0) + dmfc2 t1, 0x0046 + sd t2, OCTEON_CP2_HSH_DATW+24(a0) + dmfc2 t2, 0x0048 + sd t3, OCTEON_CP2_HSH_DATW+32(a0) + dmfc2 t3, 0x0049 + sd t0, OCTEON_CP2_HSH_DATW+40(a0) + dmfc2 t0, 0x004A + sd t1, OCTEON_CP2_HSH_DATW+48(a0) + sd t2, OCTEON_CP2_HSH_IVW(a0) + sd t3, OCTEON_CP2_HSH_IVW+8(a0) + sd t0, OCTEON_CP2_HSH_IVW+16(a0) + +3: /* pass 1 or CvmCtl[NOCRYPTO] set */ + jr ra + END(octeon_cop2_save) + +/* + * void octeon_cop2_restore(struct octeon_cop2_state *a0) + */ + .align 7 + .set push + .set noreorder + LEAF(octeon_cop2_restore) + /* First cache line was prefetched before the call */ + pref 4, 128(a0) + dmfc0 t9, $9,7 /* CvmCtl register. */ + + pref 4, 256(a0) + ld t0, OCTEON_CP2_CRC_IV(a0) + pref 4, 384(a0) + ld t1, OCTEON_CP2_CRC_LENGTH(a0) + ld t2, OCTEON_CP2_CRC_POLY(a0) + + /* Restore the COP2 CRC state */ + dmtc2 t0, 0x0201 + dmtc2 t1, 0x1202 + bbit1 t9, 28, 2f /* Skip LLM if CvmCtl[NODFA_CP2] is set */ + dmtc2 t2, 0x4200 + + /* Restore the LLM state */ + ld t0, OCTEON_CP2_LLM_DAT(a0) + ld t1, OCTEON_CP2_LLM_DAT+8(a0) + dmtc2 t0, 0x0402 + dmtc2 t1, 0x040A + +2: + bbit1 t9, 26, done_restore /* done if CvmCtl[NOCRYPTO] set */ + nop + + /* Restore the COP2 crypto state common to pass 1 and pass 2 */ + ld t0, OCTEON_CP2_3DES_IV(a0) + ld t1, OCTEON_CP2_3DES_KEY(a0) + ld t2, OCTEON_CP2_3DES_KEY+8(a0) + dmtc2 t0, 0x0084 + ld t0, OCTEON_CP2_3DES_KEY+16(a0) + dmtc2 t1, 0x0080 + ld t1, OCTEON_CP2_3DES_RESULT(a0) + dmtc2 t2, 0x0081 + ld t2, OCTEON_CP2_AES_INP0(a0) /* only really needed for pass 1 */ + dmtc2 t0, 0x0082 + ld t0, OCTEON_CP2_AES_IV(a0) + dmtc2 t1, 0x0098 + ld t1, OCTEON_CP2_AES_IV+8(a0) + dmtc2 t2, 0x010A /* only really needed for pass 1 */ + ld t2, OCTEON_CP2_AES_KEY(a0) + dmtc2 t0, 0x0102 + ld t0, OCTEON_CP2_AES_KEY+8(a0) + dmtc2 t1, 0x0103 + ld t1, OCTEON_CP2_AES_KEY+16(a0) + dmtc2 t2, 0x0104 + ld t2, OCTEON_CP2_AES_KEY+24(a0) + dmtc2 t0, 0x0105 + ld t0, OCTEON_CP2_AES_KEYLEN(a0) + dmtc2 t1, 0x0106 + ld t1, OCTEON_CP2_AES_RESULT(a0) + dmtc2 t2, 0x0107 + ld t2, OCTEON_CP2_AES_RESULT+8(a0) + mfc0 t3, $15,0 /* Get the processor ID register */ + dmtc2 t0, 0x0110 + li t0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */ + dmtc2 t1, 0x0100 + bne t0, t3, 3f /* Skip the next stuff for non-pass1 */ + dmtc2 t2, 0x0101 + + /* this code is specific for pass 1 */ + ld t0, OCTEON_CP2_HSH_DATW(a0) + ld t1, OCTEON_CP2_HSH_DATW+8(a0) + ld t2, OCTEON_CP2_HSH_DATW+16(a0) + dmtc2 t0, 0x0040 + ld t0, OCTEON_CP2_HSH_DATW+24(a0) + dmtc2 t1, 0x0041 + ld t1, OCTEON_CP2_HSH_DATW+32(a0) + dmtc2 t2, 0x0042 + ld t2, OCTEON_CP2_HSH_DATW+40(a0) + dmtc2 t0, 0x0043 + ld t0, OCTEON_CP2_HSH_DATW+48(a0) + dmtc2 t1, 0x0044 + ld t1, OCTEON_CP2_HSH_IVW(a0) + dmtc2 t2, 0x0045 + ld t2, OCTEON_CP2_HSH_IVW+8(a0) + dmtc2 t0, 0x0046 + ld t0, OCTEON_CP2_HSH_IVW+16(a0) + dmtc2 t1, 0x0048 + dmtc2 t2, 0x0049 + b done_restore /* unconditional branch */ + dmtc2 t0, 0x004A + +3: /* this is post-pass1 code */ + ld t2, OCTEON_CP2_HSH_DATW(a0) + ld t0, OCTEON_CP2_HSH_DATW+8(a0) + ld t1, OCTEON_CP2_HSH_DATW+16(a0) + dmtc2 t2, 0x0240 + ld t2, OCTEON_CP2_HSH_DATW+24(a0) + dmtc2 t0, 0x0241 + ld t0, OCTEON_CP2_HSH_DATW+32(a0) + dmtc2 t1, 0x0242 + ld t1, OCTEON_CP2_HSH_DATW+40(a0) + dmtc2 t2, 0x0243 + ld t2, OCTEON_CP2_HSH_DATW+48(a0) + dmtc2 t0, 0x0244 + ld t0, OCTEON_CP2_HSH_DATW+56(a0) + dmtc2 t1, 0x0245 + ld t1, OCTEON_CP2_HSH_DATW+64(a0) + dmtc2 t2, 0x0246 + ld t2, OCTEON_CP2_HSH_DATW+72(a0) + dmtc2 t0, 0x0247 + ld t0, OCTEON_CP2_HSH_DATW+80(a0) + dmtc2 t1, 0x0248 + ld t1, OCTEON_CP2_HSH_DATW+88(a0) + dmtc2 t2, 0x0249 + ld t2, OCTEON_CP2_HSH_DATW+96(a0) + dmtc2 t0, 0x024A + ld t0, OCTEON_CP2_HSH_DATW+104(a0) + dmtc2 t1, 0x024B + ld t1, OCTEON_CP2_HSH_DATW+112(a0) + dmtc2 t2, 0x024C + ld t2, OCTEON_CP2_HSH_IVW(a0) + dmtc2 t0, 0x024D + ld t0, OCTEON_CP2_HSH_IVW+8(a0) + dmtc2 t1, 0x024E + ld t1, OCTEON_CP2_HSH_IVW+16(a0) + dmtc2 t2, 0x0250 + ld t2, OCTEON_CP2_HSH_IVW+24(a0) + dmtc2 t0, 0x0251 + ld t0, OCTEON_CP2_HSH_IVW+32(a0) + dmtc2 t1, 0x0252 + ld t1, OCTEON_CP2_HSH_IVW+40(a0) + dmtc2 t2, 0x0253 + ld t2, OCTEON_CP2_HSH_IVW+48(a0) + dmtc2 t0, 0x0254 + ld t0, OCTEON_CP2_HSH_IVW+56(a0) + dmtc2 t1, 0x0255 + ld t1, OCTEON_CP2_GFM_MULT(a0) + dmtc2 t2, 0x0256 + ld t2, OCTEON_CP2_GFM_MULT+8(a0) + dmtc2 t0, 0x0257 + ld t0, OCTEON_CP2_GFM_POLY(a0) + dmtc2 t1, 0x0258 + ld t1, OCTEON_CP2_GFM_RESULT(a0) + dmtc2 t2, 0x0259 + ld t2, OCTEON_CP2_GFM_RESULT+8(a0) + dmtc2 t0, 0x025E + dmtc2 t1, 0x025A + dmtc2 t2, 0x025B + +done_restore: + jr ra + nop + END(octeon_cop2_restore) + .set pop + +/* + * void octeon_mult_save() + * sp is assumed to point to a struct pt_regs + * + * NOTE: This is called in SAVE_SOME in stackframe.h. It can only + * safely modify k0 and k1. + */ + .align 7 + .set push + .set noreorder + LEAF(octeon_mult_save) + dmfc0 k0, $9,7 /* CvmCtl register. */ + bbit1 k0, 27, 1f /* Skip CvmCtl[NOMUL] */ + nop + + /* Save the multiplier state */ + v3mulu k0, $0, $0 + v3mulu k1, $0, $0 + sd k0, PT_MTP(sp) /* PT_MTP has P0 */ + v3mulu k0, $0, $0 + sd k1, PT_MTP+8(sp) /* PT_MTP+8 has P1 */ + ori k1, $0, 1 + v3mulu k1, k1, $0 + sd k0, PT_MTP+16(sp) /* PT_MTP+16 has P2 */ + v3mulu k0, $0, $0 + sd k1, PT_MPL(sp) /* PT_MPL has MPL0 */ + v3mulu k1, $0, $0 + sd k0, PT_MPL+8(sp) /* PT_MPL+8 has MPL1 */ + jr ra + sd k1, PT_MPL+16(sp) /* PT_MPL+16 has MPL2 */ + +1: /* Resume here if CvmCtl[NOMUL] */ + jr ra + END(octeon_mult_save) + .set pop + +/* + * void octeon_mult_restore() + * sp is assumed to point to a struct pt_regs + * + * NOTE: This is called in RESTORE_SOME in stackframe.h. + */ + .align 7 + .set push + .set noreorder + LEAF(octeon_mult_restore) + dmfc0 k1, $9,7 /* CvmCtl register. */ + ld v0, PT_MPL(sp) /* MPL0 */ + ld v1, PT_MPL+8(sp) /* MPL1 */ + ld k0, PT_MPL+16(sp) /* MPL2 */ + bbit1 k1, 27, 1f /* Skip CvmCtl[NOMUL] */ + /* Normally falls through, so no time wasted here */ + nop + + /* Restore the multiplier state */ + ld k1, PT_MTP+16(sp) /* P2 */ + MTM0 v0 /* MPL0 */ + ld v0, PT_MTP+8(sp) /* P1 */ + MTM1 v1 /* MPL1 */ + ld v1, PT_MTP(sp) /* P0 */ + MTM2 k0 /* MPL2 */ + MTP2 k1 /* P2 */ + MTP1 v0 /* P1 */ + jr ra + MTP0 v1 /* P0 */ + +1: /* Resume here if CvmCtl[NOMUL] */ + jr ra + nop + END(octeon_mult_restore) + .set pop + diff --git a/arch/mips/mm/c-octeon.c b/arch/mips/mm/c-octeon.c new file mode 100644 index 000000000000..44d01a0a8490 --- /dev/null +++ b/arch/mips/mm/c-octeon.c @@ -0,0 +1,307 @@ +/* + * 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. + * + * Copyright (C) 2005-2007 Cavium Networks + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/bitops.h> +#include <linux/cpu.h> +#include <linux/io.h> + +#include <asm/bcache.h> +#include <asm/bootinfo.h> +#include <asm/cacheops.h> +#include <asm/cpu-features.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/r4kcache.h> +#include <asm/system.h> +#include <asm/mmu_context.h> +#include <asm/war.h> + +#include <asm/octeon/octeon.h> + +unsigned long long cache_err_dcache[NR_CPUS]; + +/** + * Octeon automatically flushes the dcache on tlb changes, so + * from Linux's viewpoint it acts much like a physically + * tagged cache. No flushing is needed + * + */ +static void octeon_flush_data_cache_page(unsigned long addr) +{ + /* Nothing to do */ +} + +static inline void octeon_local_flush_icache(void) +{ + asm volatile ("synci 0($0)"); +} + +/* + * Flush local I-cache for the specified range. + */ +static void local_octeon_flush_icache_range(unsigned long start, + unsigned long end) +{ + octeon_local_flush_icache(); +} + +/** + * Flush caches as necessary for all cores affected by a + * vma. If no vma is supplied, all cores are flushed. + * + * @vma: VMA to flush or NULL to flush all icaches. + */ +static void octeon_flush_icache_all_cores(struct vm_area_struct *vma) +{ + extern void octeon_send_ipi_single(int cpu, unsigned int action); +#ifdef CONFIG_SMP + int cpu; + cpumask_t mask; +#endif + + mb(); + octeon_local_flush_icache(); +#ifdef CONFIG_SMP + preempt_disable(); + cpu = smp_processor_id(); + + /* + * If we have a vma structure, we only need to worry about + * cores it has been used on + */ + if (vma) + mask = vma->vm_mm->cpu_vm_mask; + else + mask = cpu_online_map; + cpu_clear(cpu, mask); + for_each_cpu_mask(cpu, mask) + octeon_send_ipi_single(cpu, SMP_ICACHE_FLUSH); + + preempt_enable(); +#endif +} + + +/** + * Called to flush the icache on all cores + */ +static void octeon_flush_icache_all(void) +{ + octeon_flush_icache_all_cores(NULL); +} + + +/** + * Called to flush all memory associated with a memory + * context. + * + * @mm: Memory context to flush + */ +static void octeon_flush_cache_mm(struct mm_struct *mm) +{ + /* + * According to the R4K version of this file, CPUs without + * dcache aliases don't need to do anything here + */ +} + + +/** + * Flush a range of kernel addresses out of the icache + * + */ +static void octeon_flush_icache_range(unsigned long start, unsigned long end) +{ + octeon_flush_icache_all_cores(NULL); +} + + +/** + * Flush the icache for a trampoline. These are used for interrupt + * and exception hooking. + * + * @addr: Address to flush + */ +static void octeon_flush_cache_sigtramp(unsigned long addr) +{ + struct vm_area_struct *vma; + + vma = find_vma(current->mm, addr); + octeon_flush_icache_all_cores(vma); +} + + +/** + * Flush a range out of a vma + * + * @vma: VMA to flush + * @start: + * @end: + */ +static void octeon_flush_cache_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + if (vma->vm_flags & VM_EXEC) + octeon_flush_icache_all_cores(vma); +} + + +/** + * Flush a specific page of a vma + * + * @vma: VMA to flush page for + * @page: Page to flush + * @pfn: + */ +static void octeon_flush_cache_page(struct vm_area_struct *vma, + unsigned long page, unsigned long pfn) +{ + if (vma->vm_flags & VM_EXEC) + octeon_flush_icache_all_cores(vma); +} + + +/** + * Probe Octeon's caches + * + */ +static void __devinit probe_octeon(void) +{ + unsigned long icache_size; + unsigned long dcache_size; + unsigned int config1; + struct cpuinfo_mips *c = ¤t_cpu_data; + + switch (c->cputype) { + case CPU_CAVIUM_OCTEON: + config1 = read_c0_config1(); + c->icache.linesz = 2 << ((config1 >> 19) & 7); + c->icache.sets = 64 << ((config1 >> 22) & 7); + c->icache.ways = 1 + ((config1 >> 16) & 7); + c->icache.flags |= MIPS_CACHE_VTAG; + icache_size = + c->icache.sets * c->icache.ways * c->icache.linesz; + c->icache.waybit = ffs(icache_size / c->icache.ways) - 1; + c->dcache.linesz = 128; + if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) + c->dcache.sets = 1; /* CN3XXX has one Dcache set */ + else + c->dcache.sets = 2; /* CN5XXX has two Dcache sets */ + c->dcache.ways = 64; + dcache_size = + c->dcache.sets * c->dcache.ways * c->dcache.linesz; + c->dcache.waybit = ffs(dcache_size / c->dcache.ways) - 1; + c->options |= MIPS_CPU_PREFETCH; + break; + + default: + panic("Unsupported Cavium Networks CPU type\n"); + break; + } + + /* compute a couple of other cache variables */ + c->icache.waysize = icache_size / c->icache.ways; + c->dcache.waysize = dcache_size / c->dcache.ways; + + c->icache.sets = icache_size / (c->icache.linesz * c->icache.ways); + c->dcache.sets = dcache_size / (c->dcache.linesz * c->dcache.ways); + + if (smp_processor_id() == 0) { + pr_notice("Primary instruction cache %ldkB, %s, %d way, " + "%d sets, linesize %d bytes.\n", + icache_size >> 10, + cpu_has_vtag_icache ? + "virtually tagged" : "physically tagged", + c->icache.ways, c->icache.sets, c->icache.linesz); + + pr_notice("Primary data cache %ldkB, %d-way, %d sets, " + "linesize %d bytes.\n", + dcache_size >> 10, c->dcache.ways, + c->dcache.sets, c->dcache.linesz); + } +} + + +/** + * Setup the Octeon cache flush routines + * + */ +void __devinit octeon_cache_init(void) +{ + extern unsigned long ebase; + extern char except_vec2_octeon; + + memcpy((void *)(ebase + 0x100), &except_vec2_octeon, 0x80); + octeon_flush_cache_sigtramp(ebase + 0x100); + + probe_octeon(); + + shm_align_mask = PAGE_SIZE - 1; + + flush_cache_all = octeon_flush_icache_all; + __flush_cache_all = octeon_flush_icache_all; + flush_cache_mm = octeon_flush_cache_mm; + flush_cache_page = octeon_flush_cache_page; + flush_cache_range = octeon_flush_cache_range; + flush_cache_sigtramp = octeon_flush_cache_sigtramp; + flush_icache_all = octeon_flush_icache_all; + flush_data_cache_page = octeon_flush_data_cache_page; + flush_icache_range = octeon_flush_icache_range; + local_flush_icache_range = local_octeon_flush_icache_range; + + build_clear_page(); + build_copy_page(); +} + +/** + * Handle a cache error exception + */ + +static void cache_parity_error_octeon(int non_recoverable) +{ + unsigned long coreid = cvmx_get_core_num(); + uint64_t icache_err = read_octeon_c0_icacheerr(); + + pr_err("Cache error exception:\n"); + pr_err("cp0_errorepc == %lx\n", read_c0_errorepc()); + if (icache_err & 1) { + pr_err("CacheErr (Icache) == %llx\n", + (unsigned long long)icache_err); + write_octeon_c0_icacheerr(0); + } + if (cache_err_dcache[coreid] & 1) { + pr_err("CacheErr (Dcache) == %llx\n", + (unsigned long long)cache_err_dcache[coreid]); + cache_err_dcache[coreid] = 0; + } + + if (non_recoverable) + panic("Can't handle cache error: nested exception"); +} + +/** + * Called when the the exception is not recoverable + */ + +asmlinkage void cache_parity_error_octeon_recoverable(void) +{ + cache_parity_error_octeon(0); +} + +/** + * Called when the the exception is recoverable + */ + +asmlinkage void cache_parity_error_octeon_non_recoverable(void) +{ + cache_parity_error_octeon(1); +} + diff --git a/arch/mips/mm/cex-oct.S b/arch/mips/mm/cex-oct.S new file mode 100644 index 000000000000..3db8553fcd34 --- /dev/null +++ b/arch/mips/mm/cex-oct.S @@ -0,0 +1,70 @@ +/* + * 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. + * + * Copyright (C) 2006 Cavium Networks + * Cache error handler + */ + +#include <asm/asm.h> +#include <asm/regdef.h> +#include <asm/mipsregs.h> +#include <asm/stackframe.h> + +/* + * Handle cache error. Indicate to the second level handler whether + * the exception is recoverable. + */ + LEAF(except_vec2_octeon) + + .set push + .set mips64r2 + .set noreorder + .set noat + + + /* due to an errata we need to read the COP0 CacheErr (Dcache) + * before any cache/DRAM access */ + + rdhwr k0, $0 /* get core_id */ + PTR_LA k1, cache_err_dcache + sll k0, k0, 3 + PTR_ADDU k1, k0, k1 /* k1 = &cache_err_dcache[core_id] */ + + dmfc0 k0, CP0_CACHEERR, 1 + sd k0, (k1) + dmtc0 $0, CP0_CACHEERR, 1 + + /* check whether this is a nested exception */ + mfc0 k1, CP0_STATUS + andi k1, k1, ST0_EXL + beqz k1, 1f + nop + j cache_parity_error_octeon_non_recoverable + nop + + /* exception is recoverable */ +1: j handle_cache_err + nop + + .set pop + END(except_vec2_octeon) + + /* We need to jump to handle_cache_err so that the previous handler + * can fit within 0x80 bytes. We also move from 0xFFFFFFFFAXXXXXXX + * space (uncached) to the 0xFFFFFFFF8XXXXXXX space (cached). */ + LEAF(handle_cache_err) + .set push + .set noreorder + .set noat + + SAVE_ALL + KMODE + jal cache_parity_error_octeon_recoverable + nop + j ret_from_exception + nop + + .set pop + END(handle_cache_err) |