mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 18:59:44 +00:00
138105efe1
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>
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/cache.h>
|
|
#include <watchdog.h>
|
|
|
|
void flush_cache (ulong start_addr, ulong size)
|
|
{
|
|
#ifndef CONFIG_5xx
|
|
ulong addr, end_addr = start_addr + size;
|
|
|
|
if (CFG_CACHELINE_SIZE) {
|
|
addr = start_addr & (CFG_CACHELINE_SIZE - 1);
|
|
for (addr = start_addr;
|
|
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 */
|
|
|
|
for (addr = start_addr;
|
|
addr < end_addr;
|
|
addr += CFG_CACHELINE_SIZE) {
|
|
asm ("icbi 0,%0": :"r" (addr));
|
|
WATCHDOG_RESET();
|
|
}
|
|
}
|
|
asm ("sync"); /* Always flush prefetch queue in any case */
|
|
asm ("isync");
|
|
#endif
|
|
}
|