mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
|
|
* (C) Copyright 2008 Ilya Yanok, EmCraft Systems, yanok@emcraft.com
|
|
*
|
|
* Developed for DENX Software Engineering GmbH
|
|
*
|
|
* 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>
|
|
|
|
/*
|
|
* This test attempts to verify on-chip memory (OCM). Result is written
|
|
* to the scratch register and if test succeed it won't be run till next
|
|
* power on.
|
|
*/
|
|
|
|
#include <post.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define OCM_TEST_PATTERN1 0x55555555
|
|
#define OCM_TEST_PATTERN2 0xAAAAAAAA
|
|
|
|
#if CONFIG_POST & CONFIG_SYS_POST_OCM
|
|
|
|
static uint ocm_status_read(void)
|
|
{
|
|
return in_be32((void *)CONFIG_SYS_OCM_STATUS_ADDR) &
|
|
CONFIG_SYS_OCM_STATUS_MASK;
|
|
}
|
|
|
|
static void ocm_status_write(uint value)
|
|
{
|
|
out_be32((void *)CONFIG_SYS_OCM_STATUS_ADDR, value |
|
|
(in_be32((void *)CONFIG_SYS_OCM_STATUS_ADDR) &
|
|
~CONFIG_SYS_OCM_STATUS_MASK));
|
|
}
|
|
|
|
static inline int ocm_test_word(uint value, uint *address)
|
|
{
|
|
uint read_value;
|
|
|
|
*address = value;
|
|
sync();
|
|
read_value = *address;
|
|
|
|
return (read_value != value);
|
|
}
|
|
|
|
int ocm_post_test(int flags)
|
|
{
|
|
uint old_value;
|
|
int ret = 0;
|
|
uint *address = (uint*)CONFIG_SYS_OCM_BASE;
|
|
|
|
if (ocm_status_read() == CONFIG_SYS_OCM_STATUS_OK)
|
|
return 0;
|
|
for (; address < (uint*)(CONFIG_SYS_OCM_BASE + CONFIG_SYS_OCM_SIZE); address++) {
|
|
old_value = *address;
|
|
if (ocm_test_word(OCM_TEST_PATTERN1, address) ||
|
|
ocm_test_word(OCM_TEST_PATTERN2, address)) {
|
|
ret = 1;
|
|
*address = old_value;
|
|
printf("OCM POST failed at %p!\n", address);
|
|
break;
|
|
}
|
|
*address = old_value;
|
|
}
|
|
ocm_status_write(ret ? CONFIG_SYS_OCM_STATUS_FAIL : CONFIG_SYS_OCM_STATUS_OK);
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_POST & CONFIG_SYS_POST_OCM */
|