2005-04-16 16:20:36 -06:00
|
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/assembler.h>
|
|
|
|
#include "abort-macro.S"
|
|
|
|
/*
|
|
|
|
* Function: v5t_early_abort
|
|
|
|
*
|
2011-06-26 07:35:07 -06:00
|
|
|
* Params : r4 = aborted context pc
|
|
|
|
* : r5 = aborted context psr
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
|
|
|
* Returns : r0 = address of abort
|
|
|
|
* : r1 = FSR, bit 11 = write
|
|
|
|
* : r2-r8 = corrupted
|
|
|
|
* : r9 = preserved
|
|
|
|
* : sp = pointer to registers
|
|
|
|
*
|
|
|
|
* Purpose : obtain information about current aborted instruction.
|
|
|
|
* Note: we read user space. This means we might cause a data
|
|
|
|
* abort here if the I-TLB and D-TLB aren't seeing the same
|
|
|
|
* picture. Unfortunately, this does happen. We live with it.
|
|
|
|
*/
|
|
|
|
.align 5
|
|
|
|
ENTRY(v5t_early_abort)
|
|
|
|
mrc p15, 0, r1, c5, c0, 0 @ get FSR
|
|
|
|
mrc p15, 0, r0, c6, c0, 0 @ get FAR
|
2011-06-26 07:35:07 -06:00
|
|
|
do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3
|
|
|
|
ldreq r3, [r4] @ read aborted ARM instruction
|
2005-04-16 16:20:36 -06:00
|
|
|
bic r1, r1, #1 << 11 @ clear bits 11 of FSR
|
2011-06-26 07:42:02 -06:00
|
|
|
do_ldrd_abort tmp=ip, insn=r3
|
2005-04-16 16:20:36 -06:00
|
|
|
tst r3, #1 << 20 @ check write
|
|
|
|
orreq r1, r1, #1 << 11
|
|
|
|
mov pc, lr
|