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| author | Hyok S. Choi <hyok.choi@samsung.com> | 2006-09-28 21:46:16 +0900 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-09-28 20:15:46 +0100 |
| commit | 0f45d7f36b766cb668cebfb5d4d2f67b4a8676ba (patch) | |
| tree | 975c493fc13a2a078ef4d41374794faf1c5d1510 /arch/arm/mm/abort-lv4t.S | |
| parent | 6cc7cbef948ea2660cc40d7aab090a479f7db6a2 (diff) | |
| download | op-kernel-dev-0f45d7f36b766cb668cebfb5d4d2f67b4a8676ba.zip op-kernel-dev-0f45d7f36b766cb668cebfb5d4d2f67b4a8676ba.tar.gz | |
[ARM] nommu: abort handler fixup for !CPU_CP15_MMU cores.
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>
Diffstat (limited to 'arch/arm/mm/abort-lv4t.S')
| -rw-r--r-- | arch/arm/mm/abort-lv4t.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/mm/abort-lv4t.S b/arch/arm/mm/abort-lv4t.S index db743e5..9fb7b0e 100644 --- a/arch/arm/mm/abort-lv4t.S +++ b/arch/arm/mm/abort-lv4t.S @@ -19,11 +19,16 @@ */ ENTRY(v4t_late_abort) tst r3, #PSR_T_BIT @ check for thumb mode +#ifdef CONFIG_CPU_CP15_MMU mrc p15, 0, r1, c5, c0, 0 @ get FSR mrc p15, 0, r0, c6, c0, 0 @ get FAR + bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR +#else + mov r0, #0 @ clear r0, r1 (no FSR/FAR) + mov r1, #0 +#endif bne .data_thumb_abort ldr r8, [r2] @ read arm instruction - bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR tst r8, #1 << 20 @ L = 1 -> write? orreq r1, r1, #1 << 11 @ yes. and r7, r8, #15 << 24 |
