Linux Kernel
3.7.1
Main Page
Related Pages
Modules
Namespaces
Data Structures
Files
File List
Globals
All
Data Structures
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Groups
Pages
arch
powerpc
include
asm
edac.h
Go to the documentation of this file.
1
/*
2
* PPC EDAC common defs
3
*
4
* Author: Dave Jiang <
[email protected]
>
5
*
6
* 2007 (c) MontaVista Software, Inc. This file is licensed under
7
* the terms of the GNU General Public License version 2. This program
8
* is licensed "as is" without any warranty of any kind, whether express
9
* or implied.
10
*/
11
#ifndef ASM_EDAC_H
12
#define ASM_EDAC_H
13
/*
14
* ECC atomic, DMA, SMP and interrupt safe scrub function.
15
* Implements the per arch atomic_scrub() that EDAC use for software
16
* ECC scrubbing. It reads memory and then writes back the original
17
* value, allowing the hardware to detect and correct memory errors.
18
*/
19
static
__inline__
void
atomic_scrub(
void
*
va
,
u32
size
)
20
{
21
unsigned
int
*virt_addr =
va
;
22
unsigned
int
temp
;
23
unsigned
int
i
;
24
25
for
(i = 0; i < size /
sizeof
(*virt_addr); i++, virt_addr++) {
26
/* Very carefully read and write to memory atomically
27
* so we are interrupt, DMA and SMP safe.
28
*/
29
__asm__
__volatile__ (
"\n\
30
1: lwarx %0,0,%1\n\
31
stwcx. %0,0,%1\n\
32
bne- 1b\n\
33
isync"
34
:
"=&r"
(temp)
35
:
"r"
(virt_addr)
36
:
"cr0"
,
"memory"
);
37
}
38
}
39
40
#endif
Generated on Thu Jan 10 2013 12:55:05 for Linux Kernel by
1.8.2