]>
git.ipfire.org Git - people/ms/u-boot.git/blob - post/cpu/ppc4xx/ocm.c
2 * (C) Copyright 2008 Ilya Yanok, EmCraft Systems, yanok@emcraft.com
4 * Developed for DENX Software Engineering GmbH
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * This test attempts to verify on-chip memory (OCM). Result is written
28 * to the scratch register and if test succeed it won't be run till next
36 DECLARE_GLOBAL_DATA_PTR
;
38 #define OCM_TEST_PATTERN1 0x55555555
39 #define OCM_TEST_PATTERN2 0xAAAAAAAA
41 #if CONFIG_POST & CFG_POST_OCM
43 static uint
ocm_status_read(void)
45 return in_be32((void *)CFG_OCM_STATUS_ADDR
) &
49 static void ocm_status_write(uint value
)
51 out_be32((void *)CFG_OCM_STATUS_ADDR
, value
|
52 (in_be32((void *)CFG_OCM_STATUS_ADDR
) &
53 ~CFG_OCM_STATUS_MASK
));
56 static inline int ocm_test_word(uint value
, uint
*address
)
62 read_value
= *address
;
64 return (read_value
!= value
);
67 int ocm_post_test(int flags
)
71 uint
*address
= (uint
*)CFG_OCM_BASE
;
73 if (ocm_status_read() == CFG_OCM_STATUS_OK
)
75 for (; address
< (uint
*)(CFG_OCM_BASE
+ CFG_OCM_SIZE
); address
++) {
77 if (ocm_test_word(OCM_TEST_PATTERN1
, address
) ||
78 ocm_test_word(OCM_TEST_PATTERN2
, address
)) {
81 printf("OCM POST failed at %p!\n", address
);
86 ocm_status_write(ret
? CFG_OCM_STATUS_FAIL
: CFG_OCM_STATUS_OK
);
89 #endif /* CONFIG_POST & CFG_POST_OCM */