From 9c02defc29b57945b600714cf61ddfd02b02fb14 Mon Sep 17 00:00:00 2001
From: Yuri Tikhonov <yur@emcraft.com>
Date: Sat, 25 Aug 2007 05:07:16 +0200
Subject: [PATCH] POST: limit memory test area to not touch global data anymore
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>
---
post/drivers/memory.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/post/drivers/memory.c b/post/drivers/memory.c
index a2c088bad8..fbc349a852 100644
--- a/post/drivers/memory.c
+++ b/post/drivers/memory.c
@@ -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);
--
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