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2012-01-06sparc: Kill custom io_remap_pfn_range().David S. Miller
[ Upstream commit 3e37fd3153ac95088a74f5e7c569f7567e9f993a ] To handle the large physical addresses, just make a simple wrapper around remap_pfn_range() like MIPS does. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-03sparc: Allow handling signals when stack is corrupted.David S. Miller
commit 5598473a5b40c47a8c5349dd2c2630797169cf1a upstream. If we can't push the pending register windows onto the user's stack, we disallow signal delivery even if the signal would be delivered on a valid seperate signal stack. Add a register window save area in the signal frame, and store any unsavable windows there. On sigreturn, if any windows are still queued up in the signal frame, try to push them back onto the stack and if that fails we kill the process immediately. This allows the debug/tst-longjmp_chk2 glibc test case to pass. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-03sparc32: unbreak arch_write_unlock()Mikael Pettersson
commit 3f6aa0b113846a8628baa649af422cfc6fb1d786 upstream. The sparc32 version of arch_write_unlock() is just a plain assignment. Unfortunately this allows the compiler to schedule side-effects in a protected region to occur after the HW-level unlock, which is broken. E.g., the following trivial test case gets miscompiled: #include <linux/spinlock.h> rwlock_t lock; int counter; void foo(void) { write_lock(&lock); ++counter; write_unlock(&lock); } Fixed by adding a compiler memory barrier to arch_write_unlock(). The sparc64 version combines the barrier and assignment into a single asm(), and implements the operation as a static inline, so that's what I did too. Compile-tested with sparc32_defconfig + CONFIG_SMP=y. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-03sparc64: remove unnecessary macros from spinlock_64.hMikael Pettersson
commit a0fba3eb059e73fed2d376a901f8117734c12f1f upstream. The sparc64 spinlock_64.h contains a number of operations defined first as static inline functions, and then as macros with the same names and parameters as the functions. Maybe this was needed at some point in the past, but now nothing seems to depend on these macros (checked with a recursive grep looking for ifdefs on these names). Other archs don't define these identity-macros. So this patch deletes these unnecessary macros. Compile-tested with sparc64_defconfig. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-15sparc: Access kernel TSB using physical addressing when possible.David S. Miller
[ Upstream commit 9076d0e7e02b98f7a65df10d1956326c8d8ba61a ] On sun4v this is basically required since we point the hypervisor and the TSB walking hardware at these tables using physical addressing too. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-15sparc: Use popc when possible for ffs/__ffs/ffz.David S. Miller
[ Upstream commit 56d205cc5c0a3032a605121d4253e111193bf923 ] Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-15sparc: Set reboot-cmd using reboot data hypervisor call if available.David S. Miller
[ Upstream commit ea5e7447ea9d555558e0f13798f5143dd51a915a ] Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-15sparc: Add some missing hypervisor API groups.David S. Miller
[ Upstream commit e2eb9f8158ead43a88c0f0b4d74257b1be938a18 ] Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-15sparc: Use popc if possible for hweight routines.David S. Miller
[ Upstream commit ef7c4d4675d2a9206f913f26ca1a5cd41bff9d41 ] Just like powerpc, we code patch at boot time. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-15sparc: Sanitize cpu feature detection and reporting.David S. Miller
[ Upstream commit ac85fe8b21248054851e05bfaa352562e5b06dd3 ] Instead of evaluating the cpu features for ELF_HWCAP every exec, calculate it once at boot time. Add AV_SPARC_* capability flag bits, compatible with what Solaris reports to applications. Report these capabilities once in the kernel log, and also via /proc/cpuinfo in a new "cpucaps" entry. If available, fetch the cpu features from the machine description 'hwcap-list' property of the 'cpu' node. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-15sparc: Detect and handle UltraSPARC-T3 cpu types.David S. Miller
[ Upstream commit 4ba991d3eb379fbaa22049e7002341e97a673685 ] The cpu compatible string we look for is "SPARC-T3". As far as memset/memcpy optimizations go, we treat this chip the same as Niagara-T2/T2+. Use cache initializing stores for memset, and use perfetch, FPU block loads, cache initializing stores, and block stores for copies. We use the Niagara-T2 perf support, since T3 is a close relative in this regard. Later we'll add support for the new events T3 can report, plus enable T3's new "sample" mode. For now I haven't added any new ELF hwcap flags. We probably need to add a couple, for example: T2 and T3 both support the population count instruction in hardware. T3 supports VIS3 instructions, including support (finally) for partitioned shift. One can also now move directly between float and integer registers. T3 supports instructions meant to help with Galois Field and other HPC calculations, such as XOR multiply. Also there are "OP and negate" instructions, for example "fnmul" which is multiply-and-negate. T3 recognizes the transactional memory opcodes, however since transactional memory isn't supported: 1) 'commit' behaves as a NOP and 2) 'chkpt' always branches 3) 'rdcps' returns all zeros and 4) 'wrcps' behaves as a NOP. So we'll need about 3 new elf capability flags in the end to represent all of these things. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-15sparc: Add T3 sun4v cpu type and hypervisor group defines.David S. Miller
[ Upstream commit 15e3608d7c273947dbf2eadbcaa66e51143928fb ] Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-07-21sparc,kgdbts: fix compile regression with kgdb test suiteJason Wessel
Commit 63ab25ebbc (kgdbts: unify/generalize gdb breakpoint adjustment) introduced a compile regression on sparc. kgdbts.c: In function 'check_and_rewind_pc': kgdbts.c:307: error: implicit declaration of function 'instruction_pointer_set' Simply add the correct macro definition for instruction pointer on the Sparc architecture. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Acked-by: David S. Miller <davem@davemloft.net>
2011-07-06sparc/irqs: Do not trace arch_local_{*,irq_*} functionsSteven Rostedt
Do not trace arch_local_save_flags(), arch_local_irq_*() and friends. Although they are marked inline, gcc may still make a function out of them and add it to the pool of functions that are traced by the function tracer. This can cause undesirable results (kernel panic, triple faults, etc). Add the notrace notation to prevent them from ever being traced. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-27Fix node_start/end_pfn() definition for mm/page_cgroup.cKAMEZAWA Hiroyuki
commit 21a3c96 uses node_start/end_pfn(nid) for detection start/end of nodes. But, it's not defined in linux/mmzone.h but defined in /arch/???/include/mmzone.h which is included only under CONFIG_NEED_MULTIPLE_NODES=y. Then, we see mm/page_cgroup.c: In function 'page_cgroup_init': mm/page_cgroup.c:308: error: implicit declaration of function 'node_start_pfn' mm/page_cgroup.c:309: error: implicit declaration of function 'node_end_pfn' So, fixiing page_cgroup.c is an idea... But node_start_pfn()/node_end_pfn() is a very generic macro and should be implemented in the same manner for all archs. (m32r has different implementation...) This patch removes definitions of node_start/end_pfn() in each archs and defines a unified one in linux/mmzone.h. It's not under CONFIG_NEED_MULTIPLE_NODES, now. A result of macro expansion is here (mm/page_cgroup.c) for !NUMA start_pfn = ((&contig_page_data)->node_start_pfn); end_pfn = ({ pg_data_t *__pgdat = (&contig_page_data); __pgdat->node_start_pfn + __pgdat->node_spanned_pages;}); for NUMA (x86-64) start_pfn = ((node_data[nid])->node_start_pfn); end_pfn = ({ pg_data_t *__pgdat = (node_data[nid]); __pgdat->node_start_pfn + __pgdat->node_spanned_pages;}); Changelog: - fixed to avoid using "nid" twice in node_end_pfn() macro. Reported-and-acked-by: Randy Dunlap <randy.dunlap@oracle.com> Reported-and-tested-by: Ingo Molnar <mingo@elte.hu> Acked-by: Mel Gorman <mgorman@suse.de> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-07sparc: Remove unnecessary semicolonsJoe Perches
Semicolons are not necessary after switch/while/for/if braces so remove them. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-02sparc32,leon: add GRPCI2 PCI Host driverDaniel Hellstrom
The DMA region must be accessible in order for PCI peripheral drivers to work, the sparc32 has DMA in the normal memory zone which requires the GRPCI2 to PCI target BARs so that all kernel low mem (192MB) can be mapped 1:1 to PCI address space. The GRPCI2 has resizeable target BARs, by default the first is made 256MB and all other BARs are disabled. I/O space are always located on 0x1000-0x10000, but accessed through the GRPCI2 PCI I/O Window memory mapped to virtual address space. Configuration space is accessed through the 64KB GRPCI2 PCI CFG Window using LDA bypassing the MMU. The GRPCI2 has a single PCI Window for prefetchable and non- prefetchable address space, it is up to the AHB master requesting PCI data to determine access type. Memory space is mapped 1:1. The GRPCI2 core can be configured in 4 different IRQ modes, where PCI Interrupt, Error Interrupt and DMA Interrupt are shared on a single IRQ line or at most 5 IRQs are used. The GRPCI2 can mask/unmask PCI interrupts, Err and DMA in the control and check status bits which tells us which IRQ really happended. The GENIRQ layer is used to unmask/mask each individual IRQ source by creating virtual IRQs and implementing a IRQ chip. The optional DMA functionality of the GRPCI2 is not supported by this patch. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-02sparc32,leon: added LEON-common low-level PCI routinesDaniel Hellstrom
The LEON architecture does not have a BIOS or bootloader that initializes PCI for us, instead Linux generic PCI layer is used to set up resources and IRQ. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-02sparc32: added CONFIG_PCIC_PCI Kconfig settingDaniel Hellstrom
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-28ns: Wire up the setns system callEric W. Biederman
32bit and 64bit on x86 are tested and working. The rest I have looked at closely and I can't find any problems. setns is an easy system call to wire up. It just takes two ints so I don't expect any weird architecture porting problems. While doing this I have noticed that we have some architectures that are very slow to get new system calls. cris seems to be the slowest where the last system calls wired up were preadv and pwritev. avr32 is weird in that recvmmsg was wired up but never declared in unistd.h. frv is behind with perf_event_open being the last syscall wired up. On h8300 the last system call wired up was epoll_wait. On m32r the last system call wired up was fallocate. mn10300 has recvmmsg as the last system call wired up. The rest seem to at least have syncfs wired up which was new in the 2.6.39. v2: Most of the architecture support added by Daniel Lezcano <dlezcano@fr.ibm.com> v3: ported to v2.6.36-rc4 by: Eric W. Biederman <ebiederm@xmission.com> v4: Moved wiring up of the system call to another patch v5: ported to v2.6.39-rc6 v6: rebased onto parisc-next and net-next to avoid syscall conflicts. v7: ported to Linus's latest post 2.6.39 tree. >  arch/blackfin/include/asm/unistd.h     |    3 ++- >  arch/blackfin/mach-common/entry.S      |    1 + Acked-by: Mike Frysinger <vapier@gentoo.org> Oh - ia64 wiring looks good. Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-25sparc: mmu_gather reworkPeter Zijlstra
Rework the sparc mmu_gather usage to conform to the new world order :-) Sparc mmu_gather does two things: - tracks vaddrs to unhash - tracks pages to free Split these two things like powerpc has done and keep the vaddrs in per-cpu data structures and flush them on context switch. The remaining bits can then use the generic mmu_gather. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Tony Luck <tony.luck@intel.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hughd@google.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (28 commits) sparc32: fix build, fix missing cpu_relax declaration SCHED_TTWU_QUEUE is not longer needed since sparc32 now implements IPI sparc32,leon: Remove unnecessary page_address calls in LEON DMA API. sparc: convert old cpumask API into new one sparc32, sun4d: Implemented SMP IPIs support for SUN4D machines sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines sparc32,leon: Implemented SMP IPIs for LEON CPU sparc32: implement SMP IPIs using the generic functions sparc32,leon: SMP power down implementation sparc32,leon: added some SMP comments sparc: add {read,write}*_be routines sparc32,leon: don't rely on bootloader to mask IRQs sparc32,leon: operate on boot-cpu IRQ controller registers sparc32: always define boot_cpu_id sparc32: removed unused code, implemented by generic code sparc32: avoid build warning at mm/percpu.c:1647 sparc32: always register a PROM based early console sparc32: probe for cpu info only during startup sparc: consolidate show_cpuinfo in cpu.c sparc32,leon: implement genirq CPU affinity ...
2011-05-22sparc32: fix build, fix missing cpu_relax declarationSam Ravnborg
Fix following sparc (32 bit) build error: CC arch/sparc/kernel/asm-offsets.s In file included from include/linux/seqlock.h:29:0, from include/linux/time.h:8, from include/linux/timex.h:56, from include/linux/sched.h:57, from arch/sparc/kernel/asm-offsets.c:13: include/linux/spinlock.h: In function 'spin_unlock_wait': include/linux/spinlock.h:360:2: error: implicit declaration of function 'cpu_relax' Most likely caused by commit e66eed651fd1 ("list: remove prefetching from regular list iterators") due to include changes. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits) macvlan: fix panic if lowerdev in a bond tg3: Add braces around 5906 workaround. tg3: Fix NETIF_F_LOOPBACK error macvlan: remove one synchronize_rcu() call networking: NET_CLS_ROUTE4 depends on INET irda: Fix error propagation in ircomm_lmp_connect_response() irda: Kill set but unused variable 'bytes' in irlan_check_command_param() irda: Kill set but unused variable 'clen' in ircomm_connect_indication() rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() be2net: Kill set but unused variable 'req' in lancer_fw_download() irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication() atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined. rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer(). rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler() rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection() rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window() pkt_sched: Kill set but unused variable 'protocol' in tc_classify() isdn: capi: Use pr_debug() instead of ifdefs. tg3: Update version to 3.119 tg3: Apply rx_discards fix to 5719/5720 ... Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c as per Davem.
2011-05-20Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
2011-05-19Merge branches 'sched-core-for-linus' and 'sched-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (60 commits) sched: Fix and optimise calculation of the weight-inverse sched: Avoid going ahead if ->cpus_allowed is not changed sched, rt: Update rq clock when unthrottling of an otherwise idle CPU sched: Remove unused parameters from sched_fork() and wake_up_new_task() sched: Shorten the construction of the span cpu mask of sched domain sched: Wrap the 'cfs_rq->nr_spread_over' field with CONFIG_SCHED_DEBUG sched: Remove unused 'this_best_prio arg' from balance_tasks() sched: Remove noop in alloc_rt_sched_group() sched: Get rid of lock_depth sched: Remove obsolete comment from scheduler_tick() sched: Fix sched_domain iterations vs. RCU sched: Next buddy hint on sleep and preempt path sched: Make set_*_buddy() work on non-task entities sched: Remove need_migrate_task() sched: Move the second half of ttwu() to the remote cpu sched: Restructure ttwu() some more sched: Rename ttwu_post_activation() to ttwu_do_wakeup() sched: Remove rq argument from ttwu_stat() sched: Remove rq->lock from the first half of ttwu() sched: Drop rq->lock from sched_exec() ... * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Fix rt_rq runtime leakage bug
2011-05-16sparc: convert old cpumask API into new oneKOSAKI Motohiro
Adapt new API. Almost change is trivial, most important change are to remove following like =operator. cpumask_t cpu_mask = *mm_cpumask(mm); cpus_allowed = current->cpus_allowed; Because cpumask_var_t is =operator unsafe. These usage might prevent kernel core improvement. No functional change. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-16sparc32,leon: Implemented SMP IPIs for LEON CPUDaniel Hellstrom
This patch implements SMP IPIs on LEON using software generated IRQs to signal between CPUs. The IPI IRQ number is set by using the ipi_num property in the device tree, or defaults to 13. LEON SMP systems should reserve IRQ 13 (and IRQ 15) to Linux in order for the defaults to work. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-16sparc32: implement SMP IPIs using the generic functionsDaniel Hellstrom
The current sparc32 SMP IPI generation is implemented the cross call function. The cross call function uses IRQ15 the NMI, this is has the effect that IPIs will interrupt IRQ critical areas and hang the system. Typically on/after spin_lock_irqsave calls can be aborted. The cross call functionality must still exist to flush cache/TLBS. This patch provides CPU models a custom way to implement generation of IPIs on the generic code's request. The typical approach is to generate an IRQ for each IPI case. After this patch each sparc32 SMP CPU model needs to implement IPIs in order to function properly. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-16sparc32,leon: added some SMP commentsDaniel Hellstrom
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-12sparc: add {read,write}*_be routinesJan Andersson
This patch adds {read,write}*_be big endian memory access routines to the io.h header used on SPARC32 and SPARC64. Tested on SPARC32 (LEON) Signed-off-by: Jan Andersson <jan@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-05net: Add sendmmsg socket system callAnton Blanchard
This patch adds a multiple message send syscall and is the send version of the existing recvmmsg syscall. This is heavily based on the patch by Arnaldo that added recvmmsg. I wrote a microbenchmark to test the performance gains of using this new syscall: http://ozlabs.org/~anton/junkcode/sendmmsg_test.c The test was run on a ppc64 box with a 10 Gbit network card. The benchmark can send both UDP and RAW ethernet packets. 64B UDP batch pkts/sec 1 804570 2 872800 (+ 8 %) 4 916556 (+14 %) 8 939712 (+17 %) 16 952688 (+18 %) 32 956448 (+19 %) 64 964800 (+20 %) 64B raw socket batch pkts/sec 1 1201449 2 1350028 (+12 %) 4 1461416 (+22 %) 8 1513080 (+26 %) 16 1541216 (+28 %) 32 1553440 (+29 %) 64 1557888 (+30 %) We see a 20% improvement in throughput on UDP send and 30% on raw socket send. [ Add sparc syscall entries. -DaveM ] Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-27Merge branch 'tip/perf/core' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core Conflicts: include/linux/perf_event.h Merge reason: pick up the latest jump-label enhancements, they are cooked ready. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-04-21sparc32: always define boot_cpu_idDaniel Hellstrom
Define boot_cpu_id in single-processor kernels as well. This is to support architectures which can boot on other than CPU0. Sam Ravnborg has written the cleanup parts by extracting boot_cpu_id from smp_32.c into setup_32.c and cleaned up sun4d_irq.c. boot_cpu_id was initialized before BSS was cleared in sun4c_continue_boot, instead boot_cpu_id is set to 0xff to avoid BSS. If boot_cpu_id is untouched (0xff) by bootup code it will be overwritten to 0. boot_cpu_id4 is automatically calculated in common code. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-21sparc32: avoid build warning at mm/percpu.c:1647Sam Ravnborg
Fix following warning: mm/percpu.c: In function 'pcpu_embed_first_chunk': mm/percpu.c:1647:3: warning: format '%lx' expects type 'long unsigned int', but argument 3 has type 'unsigned int' Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> [sam: added warning message to changelog, use _AC()] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-21sparc32: probe for cpu info only during startupSam Ravnborg
We did a cpu_probe() call each time a CPU got online - which only effect was to save latest CPU/FPU info for use by show_cpuinfo(). Use same setup as for sparc64 where we probe for this info during startup, and only once. This allowed us to annotate a few functions __init which again fixed the following section mismatch warnings: WARNING: vmlinux.o(.text+0x65f0): Section mismatch in reference from the function set_cpu_and_fpu() to the (unknown reference) .init.rodata:(unknown) WARNING: vmlinux.o(.text+0x65f8): Section mismatch in reference from the function set_cpu_and_fpu() to the (unknown reference) .init.rodata:(unknown) WARNING: vmlinux.o(.text+0x664c): Section mismatch in reference from the function set_cpu_and_fpu() to the variable .init.rodata:manufacturer_info WARNING: vmlinux.o(.text+0x6650): Section mismatch in reference from the function set_cpu_and_fpu() to the variable .init.rodata:manufacturer_info Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-21sparc: consolidate show_cpuinfo in cpu.cSam Ravnborg
We have all the cpu related info in cpu.c - so move the remaining functions to support /proc/cpuinfo to this file. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-21sparc32,leon: cleaned away code from the LEON2 daysDaniel Hellstrom
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-21sparc32,leon: per-cpu ticker use genirq per-cpu handlerDaniel Hellstrom
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-21sparc32,leon: add support for extended interrupt controllerDaniel Hellstrom
The extended IRQ controller gives the LEON 16 more IRQs. The patch installs a custom handler for the exetended controller IRQ, where a register is read and the "real" IRQ causing IRQ is determined. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-19sparc32: genirq supportSam Ravnborg
The conversion of sparc32 to genirq is based on original work done by David S. Miller. Daniel Hellstrom has helped in the conversion and implemented the shutdowm functionality. Marcel van Nies <morcles@gmail.com> has tested this on Sparc Station 20 Test status: sun4c - not tested sun4m,pci - not tested sun4m,sbus - tested (Sparc Classic, Sparc Station 5, Sparc Station 20) sun4d - not tested leon - tested on various combinations of leon boards, including SMP variants generic Introduce use of GENERIC_HARDIRQS and GENERIC_IRQ_SHOW Allocate 64 IRQs - which is enough even for SS2000 Use a table of irq_bucket to maintain uses IRQs irq_bucket is also used to chain several irq's that must be called when the same intrrupt is asserted Use irq_link to link a interrupt source to the irq All plafforms must now supply their own build_device_irq method handler_irq rewriten to use generic irq support floppy Read FLOPPY_IRQ from platform device Use generic request_irq to register the floppy interrupt Rewrote sparc_floppy_irq to use the generic irq support pcic: Introduce irq_chip Store mask in chip_data for use in mask/unmask functions Add build_device_irq for pcic Use pcic_build_device_irq in pci_time_init allocate virtual irqs in pcic_fill_irq sun4c: Introduce irq_chip Store mask in chip_data for use in mask/unmask functions Add build_device_irq for sun4c Use sun4c_build_device_irq in sun4c_init_timers sun4m: Introduce irq_chip Introduce dedicated mask/unmask methods Introduce sun4m_handler_data that allow easy access to necessary data in the mask/unmask functions Add a helper method to enable profile_timer (used from smp) Added sun4m_build_device_irq Use sun4m_build_device_irq in sun4m_init_timers TODO: There is no replacement for smp_rotate that always scheduled next CPU as interrupt target upon an interrupt sun4d: Introduce irq_chip Introduce dedicated mask/unmask methods Introduce sun4d_handler_data that allow easy access to necessary data in mask/unmask fuctions Rewrote sun4d_handler_irq to use generic irq support TODO: The original implmentation of enable/disable had: if (irq < NR_IRQS) return; The new implmentation does not distingush between SBUS and cpu interrupts. I am no sure what is right here. I assume we need to do something for the cpu interrupts. I have not succeeded booting my sun4d box (with or without this patch) and my understanding of this platfrom is limited. So I would be a bit suprised if this works. leon: Introduce irq_chip Store mask in chip_data for use in mask/unmask functions Add build_device_irq for leon Use leon_build_device_irq in leon_init_timers Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Daniel Hellstrom <daniel@gaisler.com> Tested-by: Daniel Hellstrom <daniel@gaisler.com> Tested-by: Marcel van Nies <morcles@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-19sparc32: cleanup code for pci initSam Ravnborg
Move the ifdeffery to a header file to make the logic more obvious where we decide between PCI or SBUS init Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-12sched, sparc64: Turn cpu_coregroup_mask() into a real functionStephen Rothwell
This compile error triggers on Sparc64: kernel/sched.c:7140: error: 'cpu_coregroup_mask' undeclared here (not in a function) Because after the recent scheduler domain cleanups the scheduler uses this arch method as a function pointer in a scheduler topology data structure - which is not possible with a macro. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: David S. Miller <davem@davemloft.net> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20110412140040.3020ef55.sfr@canb.auug.org.au Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-04-07Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6Linus Torvalds
* 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6: Fix common misspellings
2011-04-04jump label: Introduce static_branch() interfaceJason Baron
Introduce: static __always_inline bool static_branch(struct jump_label_key *key); instead of the old JUMP_LABEL(key, label) macro. In this way, jump labels become really easy to use: Define: struct jump_label_key jump_key; Can be used as: if (static_branch(&jump_key)) do unlikely code enable/disale via: jump_label_inc(&jump_key); jump_label_dec(&jump_key); that's it! For the jump labels disabled case, the static_branch() becomes an atomic_read(), and jump_label_inc()/dec() are simply atomic_inc(), atomic_dec() operations. We show testing results for this change below. Thanks to H. Peter Anvin for suggesting the 'static_branch()' construct. Since we now require a 'struct jump_label_key *key', we can store a pointer into the jump table addresses. In this way, we can enable/disable jump labels, in basically constant time. This change allows us to completely remove the previous hashtable scheme. Thanks to Peter Zijlstra for this re-write. Testing: I ran a series of 'tbench 20' runs 5 times (with reboots) for 3 configurations, where tracepoints were disabled. jump label configured in avg: 815.6 jump label *not* configured in (using atomic reads) avg: 800.1 jump label *not* configured in (regular reads) avg: 803.4 Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20110316212947.GA8792@redhat.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Suggested-by: H. Peter Anvin <hpa@linux.intel.com> Tested-by: David Daney <ddaney@caviumnetworks.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-29sparc: Hook up syncfs system call.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-23remove dma64_addr_tFUJITA Tomonori
There is no user now. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: David Miller <davem@davemloft.net> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-23bitops: remove minix bitops from asm/bitops.hAkinobu Mita
minix bit operations are only used by minix filesystem and useless by other modules. Because byte order of inode and block bitmaps is different on each architecture like below: m68k: big-endian 16bit indexed bitmaps h8300, microblaze, s390, sparc, m68knommu: big-endian 32 or 64bit indexed bitmaps m32r, mips, sh, xtensa: big-endian 32 or 64bit indexed bitmaps for big-endian mode little-endian bitmaps for little-endian mode Others: little-endian bitmaps In order to move minix bit operations from asm/bitops.h to architecture independent code in minix filesystem, this provides two config options. CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED is only selected by m68k. CONFIG_MINIX_FS_NATIVE_ENDIAN is selected by the architectures which use native byte order bitmaps (h8300, microblaze, s390, sparc, m68knommu, m32r, mips, sh, xtensa). The architectures which always use little-endian bitmaps do not select these options. Finally, we can remove minix bit operations from asm/bitops.h for all architectures. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Greg Ungerer <gerg@uclinux.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Michal Simek <monstr@monstr.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Hirokazu Takata <takata@linux-m32r.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-23bitops: remove ext2 non-atomic bitops from asm/bitops.hAkinobu Mita
As the result of conversions, there are no users of ext2 non-atomic bit operations except for ext2 filesystem itself. Now we can put them into architecture independent code in ext2 filesystem, and remove from asm/bitops.h for all architectures. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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