Catalin Marinas e7c5650f60 ARM: 5996/1: ARM: Change the mandatory barriers implementation (4/4) ... The mandatory barriers (mb, rmb, wmb) are used even on uniprocessor systems for things like ordering Normal Non-cacheable memory accesses with DMA transfer (via Device memory writes). The current implementation uses dmb() for mb() and friends but this is not sufficient. The DMB only ensures the relative ordering of the observability of accesses by other processors or devices acting as masters. In case of DMA transfers started by writes to device memory, the relative ordering is not ensured because accesses to slave ports of a device are not considered observable by the DMB definition. A DSB is required for the data to reach the main memory (even if mapped as Normal Non-cacheable) before the device receives the notification to begin the transfer. Furthermore, some L2 cache controllers (like L2x0 or PL310) buffer stores to Normal Non-cacheable memory and this would need to be drained with the outer_sync() function call. The patch also allows platforms to define their own mandatory barriers implementation by selecting CONFIG_ARCH_HAS_BARRIERS and providing a mach/barriers.h file. Note that the SMP barriers are unchanged (being DMBs as before) since they are only guaranteed to work with Normal Cacheable memory. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2010-03-25 21:13:50 +00:00
..
hardware	Merge branch 'origin' into devel-stable	2010-03-08 20:21:04 +00:00
mach	ARM: remove old RTC support	2010-02-15 21:39:12 +00:00
a.out-core.h
a.out.h
asm-offsets.h	kbuild: move asm-offsets.h to include/generated	2009-12-12 13:08:14 +01:00
assembler.h	Merge branch 'for-rmk-2.6.32' of git://git.pengutronix.de/git/ukl/linux-2.6 into devel-stable	2009-08-15 16:51:48 +01:00
atomic.h	ARM: 5889/1: Add atomic64 routines for ARMv6k and above.	2010-02-15 21:39:50 +00:00
auxvec.h
bitops.h	ARM: boolean bit testing	2009-10-11 16:25:06 +01:00
bitsperlong.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
bug.h
bugs.h
byteorder.h
cache.h	ARM: 5700/1: ARM: Introduce ARM_L1_CACHE_SHIFT to define cache line size	2009-09-15 22:06:38 +01:00
cacheflush.h	ARM: 5993/1: ARM: Move the outer_cache definitions into a separate file (1/4)	2010-03-25 21:13:49 +00:00
cachetype.h
checksum.h
clkdev.h	ARM: Consolidate clks_register() and similar	2010-02-12 17:32:36 +00:00
cpu-multi32.h
cpu-single.h
cpu.h	ARM: 5872/1: ARM: include needed linux/cpu.h in asm/cpu.h	2010-01-10 13:03:52 +00:00
cputime.h
cputype.h	Merge branch 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into devel	2009-09-21 16:02:30 +01:00
current.h
delay.h
device.h	Driver Core: Add platform device arch data V3	2009-07-22 00:28:38 +02:00
div64.h
dma-mapping.h	dma-mapping: arm: use generic pci_set_dma_mask and pci_set_consistent_dma_mask	2010-03-12 15:52:42 -08:00
dma.h	ARM: 5870/1: arch/arm: Fix build failure for defconfigs without CONFIG_ISA_DMA_API set	2010-01-10 00:08:03 +00:00
domain.h
ecard.h
elf.h	ARM: 5987/1: fix warning in kernel/elfcore.c from ARM's elf.h	2010-03-13 10:48:22 +00:00
emergency-restart.h
entry-macro-vic2.S	ARM: Add common entry code for system with two VICs	2010-01-15 17:10:14 +09:00
errno.h
fb.h
fcntl.h
fiq.h
fixmap.h
flat.h	flat: fix data sections alignment	2009-05-29 08:40:02 -07:00
floppy.h
fpstate.h
ftrace.h	Merge branch 'devel-stable' into devel	2009-09-12 12:02:26 +01:00
futex.h	Thumb-2: Implementation of the unified start-up and exceptions code	2009-07-24 12:32:54 +01:00
glue.h	ARM: 5727/1: Pass IFSR register to do_PrefetchAbort()	2009-10-02 22:34:32 +01:00
gpio.h
hardirq.h
highmem.h
hw_irq.h
hwcap.h
ide.h
io.h	ARM: Add caller information to ioremap	2010-02-15 21:39:11 +00:00
ioctl.h
ioctls.h
ipcbuf.h
irq.h	[ARM] give RiscPC a NR_IRQS definition and remove default	2008-11-29 19:14:31 +00:00
irq_regs.h
irqflags.h
Kbuild
kdebug.h
kexec.h
kgdb.h
kmap_types.h	[ARM] kmap: fix build errors with DEBUG_HIGHMEM enabled	2009-11-20 14:23:36 +00:00
kprobes.h
leds.h
limits.h
linkage.h
local.h
localtimer.h	[ARM] smp: allow re-use of realview localtimer TWD support	2009-05-17 19:16:41 +01:00
locks.h
mach-types.h	arm: move mach-types to include/generated	2009-12-12 13:08:14 +01:00
mc146818rtc.h
memory.h	ARM: 5928/1: Change type of VMALLOC_END to unsigned long.	2010-02-15 21:40:33 +00:00
mman.h	arm: add arch_mmap_check(), get rid of sys_arm_mremap()	2009-12-11 06:34:09 -05:00
mmu.h	ARM: 5905/1: ARM: Global ASID allocation on SMP	2010-02-15 21:39:51 +00:00
mmu_context.h	ARM: 5905/1: ARM: Global ASID allocation on SMP	2010-02-15 21:39:51 +00:00
mmzone.h
module.h
msgbuf.h
mtd-xip.h
mutex.h
nwflash.h
outercache.h	ARM: 5994/1: ARM: Add outer_cache_fns.sync function pointer (2/4)	2010-03-25 21:13:49 +00:00
page-nommu.h	nommu: Remove the memory_start/end variables from ARM page-nommu.h	2009-07-24 12:35:01 +01:00
page.h	ARM: Pass VMA to copy_user_highpage() implementations	2009-10-05 15:17:45 +01:00
param.h
parport.h
pci.h	pci-dma: add linux/pci-dma.h to linux/pci.h	2010-03-12 15:52:42 -08:00
percpu.h
perf_event.h	ARM: 5900/2: arm: enable support for software perf events	2010-02-12 17:25:53 +00:00
pgalloc.h	ARM: implement highpte	2009-08-17 20:02:06 +01:00
pgtable-hwdef.h
pgtable-nommu.h	ARM: 5988/1: pgprot_dmacoherent() for non-mmu builds	2010-03-13 10:48:22 +00:00
pgtable.h	ARM: dma-mapping: switch ARMv7 DMA mappings to retain 'memory' attribute	2009-11-24 17:41:36 +00:00
pmu.h	ARM: 5899/2: arm: provide a mechanism to reserve performance counters	2010-02-12 17:23:43 +00:00
poll.h
posix_types.h
proc-fns.h	ARM: Kill CONFIG_CPU_32	2009-12-18 16:07:53 +00:00
processor.h	Add core support for ARMv6/v7 big-endian	2009-05-30 14:00:18 +01:00
procinfo.h
ptrace.h	arm: use generic ptrace_resume code	2010-03-12 15:52:38 -08:00
resource.h
scatterlist.h
sections.h
segment.h
sembuf.h
serial.h
setup.h	ARM: 5880/1: arm: use generic infrastructure for early params	2010-02-15 21:39:13 +00:00
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h	asm-generic: rename termios.h, signal.h and mman.h	2009-06-11 21:01:52 +02:00
sizes.h	[ARM] Kirkwood: create a mapping for the Security Accelerator SRAM	2009-06-08 13:05:02 -04:00
smp.h	cpumask: remove arch_send_call_function_ipi	2009-09-24 09:34:47 +09:30
smp_plat.h	ARM: Fix ptrace accesses	2009-12-14 14:54:28 +00:00
smp_scu.h	[ARM] smp: separate SCU support code from realview	2009-05-17 19:00:37 +01:00
smp_twd.h	[ARM] smp: allow re-use of realview localtimer TWD support	2009-05-17 19:16:41 +01:00
socket.h	net: Generalize socket rx gap / receive queue overflow cmsg	2009-10-12 13:26:31 -07:00
sockios.h
sparsemem.h
spinlock.h	ARM: 5897/1: spinlock: don't use deprecated barriers on ARMv7	2010-02-15 21:39:50 +00:00
spinlock_types.h	locking: Convert raw_rwlock to arch_rwlock	2009-12-14 23:55:32 +01:00
stacktrace.h
stat.h
statfs.h
string.h
swab.h	ARM: 5772/1: Use REV and REV16 for byte swapping on ARMv6+	2009-10-25 15:59:53 +00:00
system.h	ARM: 5996/1: ARM: Change the mandatory barriers implementation (4/4)	2010-03-25 21:13:50 +00:00
tcm.h	ARM: 5580/2: ARM TCM (Tightly-Coupled Memory) support v3	2009-09-15 22:11:05 +01:00
termbits.h
termios.h
therm.h
thread_info.h	ARM: vfp ptrace: no point flushing hw context for PTRACE_GETVFPREGS	2010-02-15 21:39:53 +00:00
thread_notify.h	ARM: Convert VFP/Crunch/XscaleCP thread_release() to exit_thread()	2009-12-18 14:53:41 +00:00
timex.h
tlb.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
tlbflush.h	MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself	2010-02-20 16:41:46 +00:00
topology.h
traps.h
types.h
uaccess.h	Thumb-2: Implement the unified arch/arm/lib functions	2009-07-24 12:32:57 +01:00
ucontext.h
unaligned.h
unified.h	Fix "W" macro in arch/arm/include/asm/unified.h	2009-09-18 23:30:11 +01:00
unistd.h	Add generic sys_ipc wrapper	2010-03-12 15:52:32 -08:00
unwind.h
user.h
vfp.h
vfpmacros.h
vga.h
xor.h