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885028e4ba
linux/arch/arm/mm
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Srinidhi Kasagar 885028e4ba ARM: 6741/1: errata: pl310 cache sync operation may be faulty 
The effect of cache sync operation is to drain the store buffer and
wait for all internal buffers to be empty. In normal conditions, store
buffer is able to merge the normal memory writes within its 32-byte
data buffers.  Due to this erratum present in r3p0, the effect of cache
sync operation on the store buffer still remains when the operation
completes. This means that the store buffer is always asked to drain
and this prevents it from merging any further writes.

This can severely affect performance on the write traffic esp. on
Normal memory NC one.

The proposed workaround is to replace the normal offset of cache sync
operation(0x730) by another offset targeting an unmapped PL310
register 0x740.

Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-19 11:23:21 +00:00
..
abort-ev4.S
abort-ev4t.S
abort-ev5t.S
abort-ev5tj.S
abort-ev6.S Add core support for ARMv6/v7 big-endian 2009-05-30 14:00:18 +01:00
abort-ev7.S arm: mm: qsd8x50: Fix incorrect permission faults 2010-05-03 11:15:05 -07:00
abort-lv4t.S
abort-macro.S
abort-nommu.S [ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01 12:06:34 +01:00
alignment.c ARM: 6401/1: plug a race in the alignment trap handler 2010-09-23 15:17:04 +01:00
cache-fa.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-feroceon-l2.c ARM: fix cache-feroceon-l2 after stack based kmap_atomic() 2010-12-19 12:57:16 -05:00
cache-l2x0.c ARM: 6741/1: errata: pl310 cache sync operation may be faulty 2011-02-19 11:23:21 +00:00
cache-tauros2.c ARM: Add Tauros2 L2 cache controller support 2009-11-27 15:43:21 -05:00
cache-v3.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-v4.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-v4wb.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-v4wt.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
cache-v6.S ARM: 6535/1: V6 MPCore v6_dma_inv_range and v6_dma_flush_range RWFO fix 2010-12-14 22:23:34 +00:00
cache-v7.S ARM: 6528/1: Use CTR for the I-cache line size on ARMv7 2010-12-12 23:25:58 +00:00
cache-xsc3l2.c ARM: fix cache-xsc3l2 after stack based kmap_atomic() 2010-12-19 12:57:08 -05:00
context.c ARM: 5905/1: ARM: Global ASID allocation on SMP 2010-02-15 21:39:51 +00:00
copypage-fa.c ARM: Gemini: fix compiler error in copypage-fa.c 2010-04-27 12:45:10 +02:00
copypage-feroceon.c ARM: 6164/1: Add kto and kfrom to input operands list. 2010-06-08 19:42:18 +01:00
copypage-v3.c ARM: Pass VMA to copy_user_highpage() implementations 2009-10-05 15:17:45 +01:00
copypage-v4mc.c ARM: 6379/1: Assume new page cache pages have dirty D-cache 2010-09-19 12:17:43 +01:00
copypage-v4wb.c ARM: 6164/1: Add kto and kfrom to input operands list. 2010-06-08 19:42:18 +01:00
copypage-v4wt.c ARM: 6164/1: Add kto and kfrom to input operands list. 2010-06-08 19:42:18 +01:00
copypage-v6.c ARM: 6379/1: Assume new page cache pages have dirty D-cache 2010-09-19 12:17:43 +01:00
copypage-xsc3.c ARM: 6164/1: Add kto and kfrom to input operands list. 2010-06-08 19:42:18 +01:00
copypage-xscale.c ARM: 6379/1: Assume new page cache pages have dirty D-cache 2010-09-19 12:17:43 +01:00
dma-mapping.c ARM: 6622/1: fix dma_unmap_sg() documentation 2011-01-12 19:42:13 +00:00
extable.c [ARM] Convert asm/uaccess.h to linux/uaccess.h 2008-09-06 11:35:55 +01:00
fault-armv.c ARM: pgtable: introduce pteval_t to represent a pte value 2010-11-26 20:45:47 +00:00
fault.c ARM: pgtable: switch order of Linux vs hardware page tables 2010-12-22 11:05:32 +00:00
fault.h
flush.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-01-13 10:05:56 -08:00
highmem.c ARM: get rid of kmap_high_l1_vipt() 2010-12-19 12:56:46 -05:00
idmap.c ARM: pgtable: use conventional page table code for identity mappings 2010-12-22 11:05:34 +00:00
init.c ARM: initrd: disable initrd if passed address overlaps reserved region 2011-01-31 10:53:41 +00:00
iomap.c [ARM] Convert asm/io.h to linux/io.h 2008-09-06 12:10:45 +01:00
ioremap.c Revert "ARM: relax ioremap prohibition (309caa9) for -final and -stable" 2010-12-24 09:49:52 +00:00
Kconfig ARM: make SWP emulation explicit on !CPU_USE_DOMAINS 2011-02-10 13:05:13 +00:00
Makefile ARM: pgtable: collect up identity mapping functions 2010-12-22 11:05:33 +00:00
mm.h ARM: pgtable: introduce pteval_t to represent a pte value 2010-11-26 20:45:47 +00:00
mmap.c ARM: implement CONFIG_STRICT_DEVMEM by disabling access to RAM via /dev/mem 2010-10-01 22:31:34 -04:00
mmu.c Merge branch 'pgt' (early part) into devel 2011-01-06 22:33:19 +00:00
nommu.c ARM: Convert platform reservations to use LMB rather than bootmem 2010-07-27 08:48:23 +01:00
pabort-legacy.S ARM: 5727/1: Pass IFSR register to do_PrefetchAbort() 2009-10-02 22:34:32 +01:00
pabort-v6.S ARM: 5727/1: Pass IFSR register to do_PrefetchAbort() 2009-10-02 22:34:32 +01:00
pabort-v7.S ARM: 5727/1: Pass IFSR register to do_PrefetchAbort() 2009-10-02 22:34:32 +01:00
pgd.c thp: pte alloc trans splitting 2011-01-13 17:32:40 -08:00
proc-arm6_7.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm7tdmi.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm9tdmi.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm720.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm740.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-arm920.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm922.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm925.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm926.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm940.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm946.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm1020.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm1020e.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm1022.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-arm1026.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-fa526.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-feroceon.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-macros.S Merge branch 'pgt' (early part) into devel 2011-01-06 22:33:19 +00:00
proc-mohawk.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-sa110.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-sa1100.S ARM: hotplug cpu: Keep processor information, startup code & __lookup_processor_type 2010-10-08 10:07:32 +01:00
proc-syms.c ARM: add size argument to __cpuc_flush_dcache_page 2009-12-14 14:53:22 +00:00
proc-v6.S Merge branch 'hotplug' into devel 2010-10-18 22:34:47 +01:00
proc-v7.S ARM: 6623/1: Thumb-2: Fix out-of-range offset for Thumb-2 in proc-v7.S 2011-01-14 09:00:30 +00:00
proc-xsc3.S ARM: 6466/1: implement flush_icache_all for the rest of the CPUs 2010-10-28 13:54:28 +01:00
proc-xscale.S ARM: pgtable: provide RDONLY page table bit rather than WRITE bit 2010-12-22 11:05:35 +00:00
tlb-fa.S ARM: Add support for FA526 v2 2009-03-25 13:10:01 +02:00
tlb-v3.S
tlb-v4.S
tlb-v4wb.S
tlb-v4wbi.S
tlb-v6.S arm: Use __INIT macro instead of .text.init. 2009-04-27 19:51:58 -07:00
tlb-v7.S ARM: Allow SMP kernels to boot on UP systems 2010-10-04 20:23:36 +01:00
vmregion.c ARM: DMA coherent allocator: align remapped addresses 2010-07-27 10:43:48 +01:00
vmregion.h ARM: DMA coherent allocator: align remapped addresses 2010-07-27 10:43:48 +01:00