diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2008-08-01 15:20:30 +1000 |
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committer | Paul Mackerras <paulus@samba.org> | 2008-08-04 12:02:00 +1000 |
commit | b8b572e1015f81b4e748417be2629dfe51ab99f9 (patch) | |
tree | 7df58667d5ed71d6c8f8f4ce40ca16b6fb776d0b /arch/powerpc/include/asm/edac.h | |
parent | 2b12a4c524812fb3f6ee590a02e65b95c8c32229 (diff) | |
download | linux-b8b572e1015f81b4e748417be2629dfe51ab99f9.tar.bz2 |
powerpc: Move include files to arch/powerpc/include/asm
from include/asm-powerpc. This is the result of a
mkdir arch/powerpc/include/asm
git mv include/asm-powerpc/* arch/powerpc/include/asm
Followed by a few documentation/comment fixups and a couple of places
where <asm-powepc/...> was being used explicitly. Of the latter only
one was outside the arch code and it is a driver only built for powerpc.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/include/asm/edac.h')
-rw-r--r-- | arch/powerpc/include/asm/edac.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/edac.h b/arch/powerpc/include/asm/edac.h new file mode 100644 index 000000000000..6ead88bbfbb8 --- /dev/null +++ b/arch/powerpc/include/asm/edac.h @@ -0,0 +1,40 @@ +/* + * PPC EDAC common defs + * + * Author: Dave Jiang <djiang@mvista.com> + * + * 2007 (c) MontaVista Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ +#ifndef ASM_EDAC_H +#define ASM_EDAC_H +/* + * ECC atomic, DMA, SMP and interrupt safe scrub function. + * Implements the per arch atomic_scrub() that EDAC use for software + * ECC scrubbing. It reads memory and then writes back the original + * value, allowing the hardware to detect and correct memory errors. + */ +static __inline__ void atomic_scrub(void *va, u32 size) +{ + unsigned int *virt_addr = va; + unsigned int temp; + unsigned int i; + + for (i = 0; i < size / sizeof(*virt_addr); i++, virt_addr++) { + /* Very carefully read and write to memory atomically + * so we are interrupt, DMA and SMP safe. + */ + __asm__ __volatile__ ("\n\ + 1: lwarx %0,0,%1\n\ + stwcx. %0,0,%1\n\ + bne- 1b\n\ + isync" + : "=&r"(temp) + : "r"(virt_addr) + : "cr0", "memory"); + } +} + +#endif |