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[ARM] nommu: abort handler fixup for !CPU_CP15_MMU cores.

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There is no FSR/FAR register on no-CP15 or MPU cores. This patch adds a
dummy abort handler which returns zero for the base restored Data Abort
model !CPU_CP15_MMU cores. The abort-lv4t.S is still used with the fix-up
for the base updated Data Abort model cores.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Hyok S. Choi
2006-09-28 21:46:16 +09:00
committed by Russell King
parent 6cc7cbef94
commit 0f45d7f36b
7 changed files with 35 additions and 7 deletions
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19
arch/arm/mm/abort-nommu.S Normal file
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#include <linux/linkage.h>
#include <asm/assembler.h>
/*
* Function: nommu_early_abort
*
* Params : r2 = address of aborted instruction
* : r3 = saved SPSR
*
* Returns : r0 = 0 (abort address)
* : r1 = 0 (FSR)
*
* Note: There is no FSR/FAR on !CPU_CP15_MMU cores.
* Just fill zero into the registers.
*/
.align 5
ENTRY(nommu_early_abort)
mov r0, #0 @ clear r0, r1 (no FSR/FAR)
mov r1, #0
mov pc, lr