diff options
| author | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-05-03 08:14:09 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-05-03 08:14:09 +0100 |
| commit | 27b030d58c8e72fc7a95187a791bd9406e350f02 (patch) | |
| tree | ab3bab7f39a5ce5bab65578a7e08fa4dfdeb198c /arch/arm/mm/abort-ev6.S | |
| parent | 79d20b14a0d651f15b0ef9a22b6cf12d284a6d38 (diff) | |
| parent | 6628465e33ca694bd8fd5c3cf4eb7ff9177bc694 (diff) | |
| download | blackbird-op-linux-27b030d58c8e72fc7a95187a791bd9406e350f02.tar.gz blackbird-op-linux-27b030d58c8e72fc7a95187a791bd9406e350f02.zip | |
Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'arch/arm/mm/abort-ev6.S')
| -rw-r--r-- | arch/arm/mm/abort-ev6.S | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/mm/abort-ev6.S b/arch/arm/mm/abort-ev6.S index 38b2cbb89beb..8f76f3df7b4c 100644 --- a/arch/arm/mm/abort-ev6.S +++ b/arch/arm/mm/abort-ev6.S @@ -1,5 +1,6 @@ #include <linux/linkage.h> #include <asm/assembler.h> +#include "abort-macro.S" /* * Function: v6_early_abort * @@ -13,11 +14,26 @@ * : 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(v6_early_abort) mrc p15, 0, r1, c5, c0, 0 @ get FSR mrc p15, 0, r0, c6, c0, 0 @ get FAR +/* + * Faulty SWP instruction on 1136 doesn't set bit 11 in DFSR. + * The test below covers all the write situations, including Java bytecodes + */ + bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR + tst r3, #PSR_J_BIT @ Java? + movne pc, lr + do_thumb_abort + ldreq r3, [r2] @ read aborted ARM instruction + do_ldrd_abort + tst r3, #1 << 20 @ L = 0 -> write + orreq r1, r1, #1 << 11 @ yes. mov pc, lr |
