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Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/linkage.h> |
2 | #include <asm/assembler.h> | |
3 | #include "abort-macro.S" | |
4 | /* | |
5 | * Function: v5tj_early_abort | |
6 | * | |
da740472 RK |
7 | * Params : r2 = pt_regs |
8 | * : r4 = aborted context pc | |
3e287bec | 9 | * : r5 = aborted context psr |
1da177e4 | 10 | * |
da740472 | 11 | * Returns : r4 - r11, r13 preserved |
1da177e4 LT |
12 | * |
13 | * Purpose : obtain information about current aborted instruction. | |
14 | * Note: we read user space. This means we might cause a data | |
15 | * abort here if the I-TLB and D-TLB aren't seeing the same | |
16 | * picture. Unfortunately, this does happen. We live with it. | |
17 | */ | |
18 | .align 5 | |
19 | ENTRY(v5tj_early_abort) | |
20 | mrc p15, 0, r1, c5, c0, 0 @ get FSR | |
21 | mrc p15, 0, r0, c6, c0, 0 @ get FAR | |
22 | bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR | |
3e287bec | 23 | tst r5, #PSR_J_BIT @ Java? |
da740472 | 24 | bne do_DataAbort |
3e287bec RK |
25 | do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3 |
26 | ldreq r3, [r4] @ read aborted ARM instruction | |
2190fed6 | 27 | uaccess_disable ip @ disable userspace access |
08446b12 RK |
28 | teq_ldrd tmp=ip, insn=r3 @ insn was LDRD? |
29 | beq do_DataAbort @ yes | |
1da177e4 LT |
30 | tst r3, #1 << 20 @ L = 0 -> write |
31 | orreq r1, r1, #1 << 11 @ yes. | |
da740472 | 32 | b do_DataAbort |