Patchwork [U-Boot,V2,RESEND,01/24] SPEAr: Fix ARM relocation support

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Submitter Amit Virdi
Date May 7, 2012, 7:36 a.m.
Message ID <d8ccac164ae97b4b0cc84920eb09d00fc5b5f052.1336376035.git.amit.virdi@st.com>
Download mbox | patch
Permalink /patch/157247/
State Accepted
Delegated to: Stefan Roese
Headers show

Comments

Amit Virdi - May 7, 2012, 7:36 a.m.
While the u-boot code is running from the flash, it is essential that no access
is made to the bss segment. This is due to the fact that .rel.dyn and .bss areas
overlap and former contains information used in relocation. In SPEAr, this was
not taken into consideration. As a result, while the relocation wasn't complete,
dram_init populated an uninitialized global variable resulting in corruption of
.rel.dyn area, which resulted in u-boot crash.

This commit fixes this problem by removing code that accesses bss segment

Signed-off-by: Amit Virdi <amit.virdi@st.com>
Acked-by: Stefan Roese <sr@denx.de>
---
 board/spear/common/spr_misc.c |   20 +-------------------
 1 files changed, 1 insertions(+), 19 deletions(-)

Patch

diff --git a/board/spear/common/spr_misc.c b/board/spear/common/spr_misc.c
index 0812c20..3ab278f 100644
--- a/board/spear/common/spr_misc.c
+++ b/board/spear/common/spr_misc.c
@@ -40,27 +40,9 @@  static struct chip_data chip_data;
 
 int dram_init(void)
 {
-	struct xloader_table *xloader_tb =
-	    (struct xloader_table *)XLOADER_TABLE_ADDRESS;
-	struct xloader_table_1_1 *table_1_1;
-	struct xloader_table_1_2 *table_1_2;
-	struct chip_data *chip = &chip_data;
-
+	/* Store complete RAM size and return */
 	gd->ram_size = get_ram_size(PHYS_SDRAM_1, PHYS_SDRAM_1_MAXSIZE);
 
-	if (XLOADER_TABLE_VERSION_1_1 == xloader_tb->table_version) {
-		table_1_1 = &xloader_tb->table.table_1_1;
-		chip->dramfreq = table_1_1->ddrfreq;
-		chip->dramtype = table_1_1->ddrtype;
-
-	} else if (XLOADER_TABLE_VERSION_1_2 == xloader_tb->table_version) {
-		table_1_2 = &xloader_tb->table.table_1_2;
-		chip->dramfreq = table_1_2->ddrfreq;
-		chip->dramtype = table_1_2->ddrtype;
-	} else {
-		chip->dramfreq = -1;
-	}
-
 	return 0;
 }