1 #include <linux/linkage.h>
2 #include <asm/assembler.h>
3 #include "abort-macro.S"
5 * Function: v5t_early_abort
7 * Params : r2 = pt_regs
8 * : r4 = aborted context pc
9 * : r5 = aborted context psr
11 * Returns : r4 - r11, r13 preserved
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.
19 ENTRY(v5t_early_abort)
20 mrc p15, 0, r1, c5, c0, 0 @ get FSR
21 mrc p15, 0, r0, c6, c0, 0 @ get FAR
22 do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3
23 ldreq r3, [r4] @ read aborted ARM instruction
24 bic r1, r1, #1 << 11 @ clear bits 11 of FSR
25 do_ldrd_abort tmp=ip, insn=r3
26 tst r3, #1 << 20 @ check write
27 orreq r1, r1, #1 << 11