diff options
Diffstat (limited to 'arch/arm/mm/abort-ev4t.S')
-rw-r--r-- | arch/arm/mm/abort-ev4t.S | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/arch/arm/mm/abort-ev4t.S b/arch/arm/mm/abort-ev4t.S index b6282548f922..9da704e7b86e 100644 --- a/arch/arm/mm/abort-ev4t.S +++ b/arch/arm/mm/abort-ev4t.S | |||
@@ -4,14 +4,11 @@ | |||
4 | /* | 4 | /* |
5 | * Function: v4t_early_abort | 5 | * Function: v4t_early_abort |
6 | * | 6 | * |
7 | * Params : r2 = address of aborted instruction | 7 | * Params : r2 = pt_regs |
8 | * : r3 = saved SPSR | 8 | * : r4 = aborted context pc |
9 | * : r5 = aborted context psr | ||
9 | * | 10 | * |
10 | * Returns : r0 = address of abort | 11 | * Returns : r4 - r11, r13 preserved |
11 | * : r1 = FSR, bit 11 = write | ||
12 | * : r2-r8 = corrupted | ||
13 | * : r9 = preserved | ||
14 | * : sp = pointer to registers | ||
15 | * | 12 | * |
16 | * Purpose : obtain information about current aborted instruction. | 13 | * Purpose : obtain information about current aborted instruction. |
17 | * Note: we read user space. This means we might cause a data | 14 | * Note: we read user space. This means we might cause a data |
@@ -22,9 +19,9 @@ | |||
22 | ENTRY(v4t_early_abort) | 19 | ENTRY(v4t_early_abort) |
23 | mrc p15, 0, r1, c5, c0, 0 @ get FSR | 20 | mrc p15, 0, r1, c5, c0, 0 @ get FSR |
24 | mrc p15, 0, r0, c6, c0, 0 @ get FAR | 21 | mrc p15, 0, r0, c6, c0, 0 @ get FAR |
25 | do_thumb_abort | 22 | do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3 |
26 | ldreq r3, [r2] @ read aborted ARM instruction | 23 | ldreq r3, [r4] @ read aborted ARM instruction |
27 | bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR | 24 | bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR |
28 | tst r3, #1 << 20 @ check write | 25 | tst r3, #1 << 20 @ check write |
29 | orreq r1, r1, #1 << 11 | 26 | orreq r1, r1, #1 << 11 |
30 | mov pc, lr | 27 | b do_DataAbort |