linux/arch/arm/mm/pabort-v6.S
Russell King 8b4186160b ARM: entry: prefetch abort helper: pass aborted pc in r4 rather than r0
This avoids unnecessary instructions for CPUs which implement the IFAR
(instruction fault address register).

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-30 11:04:59 +01:00

21 lines
368 B
ArmAsm

#include <linux/linkage.h>
#include <asm/assembler.h>
/*
* Function: v6_pabort
*
* Params : r4 = address of aborted instruction
*
* Returns : r0 = address of abort
* : r1 = IFSR
*
* Purpose : obtain information about current prefetch abort.
*/
.align 5
ENTRY(v6_pabort)
mov r0, r4
mrc p15, 0, r1, c5, c0, 1 @ get IFSR
mov pc, lr
ENDPROC(v6_pabort)