threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/*
|
|
* 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 edac_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 edac_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
|