diff options
Diffstat (limited to 'arch/arm/mm/abort-macro.S')
| -rw-r--r-- | arch/arm/mm/abort-macro.S | 34 |
1 files changed, 16 insertions, 18 deletions
diff --git a/arch/arm/mm/abort-macro.S b/arch/arm/mm/abort-macro.S index d7cb1bfa51a4..52162d59407a 100644 --- a/arch/arm/mm/abort-macro.S +++ b/arch/arm/mm/abort-macro.S | |||
| @@ -9,34 +9,32 @@ | |||
| 9 | * | 9 | * |
| 10 | */ | 10 | */ |
| 11 | 11 | ||
| 12 | .macro do_thumb_abort | 12 | .macro do_thumb_abort, fsr, pc, psr, tmp |
| 13 | tst r3, #PSR_T_BIT | 13 | tst \psr, #PSR_T_BIT |
| 14 | beq not_thumb | 14 | beq not_thumb |
| 15 | ldrh r3, [r2] @ Read aborted Thumb instruction | 15 | ldrh \tmp, [\pc] @ Read aborted Thumb instruction |
| 16 | and r3, r3, # 0xfe00 @ Mask opcode field | 16 | and \tmp, \tmp, # 0xfe00 @ Mask opcode field |
| 17 | cmp r3, # 0x5600 @ Is it ldrsb? | 17 | cmp \tmp, # 0x5600 @ Is it ldrsb? |
| 18 | orreq r3, r3, #1 << 11 @ Set L-bit if yes | 18 | orreq \tmp, \tmp, #1 << 11 @ Set L-bit if yes |
| 19 | tst r3, #1 << 11 @ L = 0 -> write | 19 | tst \tmp, #1 << 11 @ L = 0 -> write |
| 20 | orreq r1, r1, #1 << 11 @ yes. | 20 | orreq \psr, \psr, #1 << 11 @ yes. |
| 21 | mov pc, lr | 21 | b do_DataAbort |
| 22 | not_thumb: | 22 | not_thumb: |
| 23 | .endm | 23 | .endm |
| 24 | 24 | ||
| 25 | /* | 25 | /* |
| 26 | * We check for the following insturction encoding for LDRD. | 26 | * We check for the following instruction encoding for LDRD. |
| 27 | * | 27 | * |
| 28 | * [27:25] == 0 | 28 | * [27:25] == 000 |
| 29 | * [7:4] == 1101 | 29 | * [7:4] == 1101 |
| 30 | * [20] == 0 | 30 | * [20] == 0 |
| 31 | */ | 31 | */ |
| 32 | .macro do_ldrd_abort | 32 | .macro do_ldrd_abort, tmp, insn |
| 33 | tst r3, #0x0e000000 @ [27:25] == 0 | 33 | tst \insn, #0x0e100000 @ [27:25,20] == 0 |
| 34 | bne not_ldrd | 34 | bne not_ldrd |
| 35 | and r2, r3, #0x000000f0 @ [7:4] == 1101 | 35 | and \tmp, \insn, #0x000000f0 @ [7:4] == 1101 |
| 36 | cmp r2, #0x000000d0 | 36 | cmp \tmp, #0x000000d0 |
| 37 | bne not_ldrd | 37 | beq do_DataAbort |
| 38 | tst r3, #1 << 20 @ [20] == 0 | ||
| 39 | moveq pc, lr | ||
| 40 | not_ldrd: | 38 | not_ldrd: |
| 41 | .endm | 39 | .endm |
| 42 | 40 | ||
