74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/*
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* (C) Copyright 2008 Ilya Yanok, EmCraft Systems, yanok@emcraft.com
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*
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* Developed for DENX Software Engineering GmbH
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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/*
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* This test attempts to verify on-chip memory (OCM). Result is written
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* to the scratch register and if test succeed it won't be run till next
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* power on.
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*/
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#include <post.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define OCM_TEST_PATTERN1 0x55555555
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#define OCM_TEST_PATTERN2 0xAAAAAAAA
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#if CONFIG_POST & CONFIG_SYS_POST_OCM
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static uint ocm_status_read(void)
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{
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return in_be32((void *)CONFIG_SYS_OCM_STATUS_ADDR) &
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CONFIG_SYS_OCM_STATUS_MASK;
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}
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static void ocm_status_write(uint value)
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{
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out_be32((void *)CONFIG_SYS_OCM_STATUS_ADDR, value |
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(in_be32((void *)CONFIG_SYS_OCM_STATUS_ADDR) &
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~CONFIG_SYS_OCM_STATUS_MASK));
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}
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static inline int ocm_test_word(uint value, uint *address)
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{
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uint read_value;
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*address = value;
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sync();
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read_value = *address;
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return (read_value != value);
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}
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int ocm_post_test(int flags)
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{
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uint old_value;
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int ret = 0;
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uint *address = (uint*)CONFIG_SYS_OCM_BASE;
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if (ocm_status_read() == CONFIG_SYS_OCM_STATUS_OK)
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return 0;
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for (; address < (uint*)(CONFIG_SYS_OCM_BASE + CONFIG_SYS_OCM_SIZE); address++) {
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old_value = *address;
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if (ocm_test_word(OCM_TEST_PATTERN1, address) ||
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ocm_test_word(OCM_TEST_PATTERN2, address)) {
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ret = 1;
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*address = old_value;
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printf("OCM POST failed at %p!\n", address);
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break;
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}
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*address = old_value;
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}
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ocm_status_write(ret ? CONFIG_SYS_OCM_STATUS_FAIL : CONFIG_SYS_OCM_STATUS_OK);
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return ret;
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}
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#endif /* CONFIG_POST & CONFIG_SYS_POST_OCM */
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