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/*
* (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 & CFG_POST_OCM
static uint ocm_status_read(void)
{
return in_be32((void *)CFG_OCM_STATUS_ADDR) &
CFG_OCM_STATUS_MASK;
}
static void ocm_status_write(uint value)
{
out_be32((void *)CFG_OCM_STATUS_ADDR, value |
(in_be32((void *)CFG_OCM_STATUS_ADDR) &
~CFG_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*)CFG_OCM_BASE;
if (ocm_status_read() == CFG_OCM_STATUS_OK)
return 0;
for (; address < (uint*)(CFG_OCM_BASE + CFG_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 ? CFG_OCM_STATUS_FAIL : CFG_OCM_STATUS_OK);
return ret;
}
#endif /* CONFIG_POST & CFG_POST_OCM */
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