Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #include <linux/linkage.h> |
2 | #include <asm/assembler.h> | |
3 | #include "abort-macro.S" | |
4 | /* | |
5 | * Function: v5tj_early_abort | |
6 | * | |
7 | * Params : r2 = address of aborted instruction | |
8 | * : r3 = saved SPSR | |
9 | * | |
10 | * Returns : r0 = address of abort | |
11 | * : r1 = FSR, bit 11 = write | |
12 | * : r2-r8 = corrupted | |
13 | * : r9 = preserved | |
14 | * : sp = pointer to registers | |
15 | * | |
16 | * Purpose : obtain information about current aborted instruction. | |
17 | * Note: we read user space. This means we might cause a data | |
18 | * abort here if the I-TLB and D-TLB aren't seeing the same | |
19 | * picture. Unfortunately, this does happen. We live with it. | |
20 | */ | |
21 | .align 5 | |
22 | ENTRY(v5tj_early_abort) | |
23 | mrc p15, 0, r1, c5, c0, 0 @ get FSR | |
24 | mrc p15, 0, r0, c6, c0, 0 @ get FAR | |
25 | bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR | |
26 | tst r3, #PSR_J_BIT @ Java? | |
27 | movne pc, lr | |
28 | do_thumb_abort | |
29 | ldreq r3, [r2] @ read aborted ARM instruction | |
30 | do_ldrd_abort | |
31 | tst r3, #1 << 20 @ L = 0 -> write | |
32 | orreq r1, r1, #1 << 11 @ yes. | |
33 | mov pc, lr | |
34 | ||
35 |