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POST: limit memory test area to not touch global data anymore

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As experienced on lwmon5, on some boards the POST memory test can
corrupt the global data buffer (bd). This patch fixes this issue
by checking and limiting this area.

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Yuri Tikhonov 2007-08-25 05:07:16 +02:00 committed by Stefan Roese
parent 75e1a84d48
commit 9c02defc29
1 changed files with 3 additions and 0 deletions
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3
post/drivers/memory.c
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@ -461,6 +461,9 @@ int memory_post_test (int flags)
unsigned long memsize = (bd->bi_memsize >= 256 << 20 ?
256 << 20 : bd->bi_memsize) - (1 << 20);
/* Limit area to be tested with the board info struct */
if (CFG_SDRAM_BASE + memsize > (ulong)bd)
memsize = (ulong)bd - CFG_SDRAM_BASE;
if (flags & POST_SLOWTEST) {
ret = memory_post_tests (CFG_SDRAM_BASE, memsize);