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ppc flush_cache: add watch-dog triggering into the loops.

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Some boards (e.g. lwmon5) need rather a frequent watch-dog
kicking. Since the time it takes for the flush_cache() function
to complete its job depends on the size of data being flushed, one
may encounter watch-dog resets on such boards when, for example,
download big files over ethernet.

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
This commit is contained in:
Yuri Tikhonov 2008-04-29 13:32:45 +02:00 • committed by Wolfgang Denk
parent 18ec19e4aa
commit 138105efe1
1 changed files with 3 additions and 0 deletions
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3
lib_ppc/cache.c
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@ -23,6 +23,7 @@
#include <common.h>
#include <asm/cache.h>
#include <watchdog.h>
void flush_cache (ulong start_addr, ulong size)
{
@ -35,6 +36,7 @@ void flush_cache (ulong start_addr, ulong size)
addr < end_addr;
addr += CFG_CACHELINE_SIZE) {
asm ("dcbst 0,%0": :"r" (addr));
WATCHDOG_RESET();
}
asm ("sync"); /* Wait for all dcbst to complete on bus */
@ -42,6 +44,7 @@ void flush_cache (ulong start_addr, ulong size)
addr < end_addr;
addr += CFG_CACHELINE_SIZE) {
asm ("icbi 0,%0": :"r" (addr));
WATCHDOG_RESET();
}
}
asm ("sync"); /* Always flush prefetch queue in any case */