projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 6e8ec682 YT |
1 | /* |
| 2 | * (C) Copyright 2008 Ilya Yanok, EmCraft Systems, yanok@emcraft.com | |
| 3 | * | |
| 4 | * Developed for DENX Software Engineering GmbH | |
| 5 | * | |
| 6 | * See file CREDITS for list of people who contributed to this | |
| 7 | * project. | |
| 8 | * | |
| 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. | |
| 13 | * | |
| 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. | |
| 18 | * | |
| 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, | |
| 22 | * MA 02111-1307 USA | |
| 23 | */ | |
| 24 | #include <common.h> | |
| 25 | ||
| 26 | /* | |
| 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 | |
| 29 | * power on. | |
| 30 | */ | |
| 31 | ||
| 32 | #include <post.h> | |
| 33 | ||
| 34 | #include <asm/io.h> | |
| 35 | ||
| 36 | DECLARE_GLOBAL_DATA_PTR; | |
| 37 | ||
| 38 | #define OCM_TEST_PATTERN1 0x55555555 | |
| 39 | #define OCM_TEST_PATTERN2 0xAAAAAAAA | |
| 40 | ||
| 41 | #if CONFIG_POST & CFG_POST_OCM | |
| 42 | ||
| 43 | static uint ocm_status_read(void) | |
| 44 | { | |
| 45 | return in_be32((void *)CFG_OCM_STATUS_ADDR) & | |
| 46 | CFG_OCM_STATUS_MASK; | |
| 47 | } | |
| 48 | ||
| 49 | static void ocm_status_write(uint value) | |
| 50 | { | |
| 51 | out_be32((void *)CFG_OCM_STATUS_ADDR, value | | |
| 52 | (in_be32((void *)CFG_OCM_STATUS_ADDR) & | |
| 53 | ~CFG_OCM_STATUS_MASK)); | |
| 54 | } | |
| 55 | ||
| 56 | static inline int ocm_test_word(uint value, uint *address) | |
| 57 | { | |
| 58 | uint read_value; | |
| 59 | ||
| 60 | *address = value; | |
| 61 | sync(); | |
| 62 | read_value = *address; | |
| 63 | ||
| 64 | return (read_value != value); | |
| 65 | } | |
| 66 | ||
| 67 | int ocm_post_test(int flags) | |
| 68 | { | |
| 69 | uint old_value; | |
| 70 | int ret = 0; | |
| 71 | uint *address = (uint*)CFG_OCM_BASE; | |
| 72 | ||
| 73 | if (ocm_status_read() == CFG_OCM_STATUS_OK) | |
| 74 | return 0; | |
| 75 | for (; address < (uint*)(CFG_OCM_BASE + CFG_OCM_SIZE); address++) { | |
| 76 | old_value = *address; | |
| 77 | if (ocm_test_word(OCM_TEST_PATTERN1, address) || | |
| 78 | ocm_test_word(OCM_TEST_PATTERN2, address)) { | |
| 79 | ret = 1; | |
| 80 | *address = old_value; | |
| 81 | printf("OCM POST failed at %p!\n", address); | |
| 82 | break; | |
| 83 | } | |
| 84 | *address = old_value; | |
| 85 | } | |
| 86 | ocm_status_write(ret ? CFG_OCM_STATUS_FAIL : CFG_OCM_STATUS_OK); | |
| 87 | return ret; | |
| 88 | } | |
| 89 | #endif /* CONFIG_POST & CFG_POST_OCM */ |