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ARM: zImage: Fix bad SP address after relocating kernel 

Otherwise cache_clean_flush can overwrite some of the relocated
area depending on where the kernel image gets loaded. This fixes
booting on n900 after commit 6d7d0ae515
(ARM: 6750/1: improvements to compressed/head.S).

Thanks to Aaro Koskinen <aaro.koskinen@nokia.com> for debugging
the address of the relocated area that gets corrupted, and to
Nicolas Pitre <nicolas.pitre@linaro.org> for the other uncompress
related fixes.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
This commit is contained in:
Tony Lindgren 2011-04-26 05:37:46 -07:00 committed by Nicolas Pitre
parent 3bd2cbb955
commit 7c2527f0c4
1 changed files with 5 additions and 0 deletions
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5
arch/arm/boot/compressed/head.S
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@ -253,6 +253,11 @@ restart: adr r0, LC0
/* Preserve offset to relocated code. */
sub r6, r9, r6
#ifndef CONFIG_ZBOOT_ROM
/* cache_clean_flush may use the stack, so relocate it */
add sp, sp, r6
#endif
bl cache_clean_flush
adr r0, BSYM(restart)