1 #include <linux/linkage.h>
2 #include <asm/assembler.h>
4 * Function: v5tj_early_abort
6 * Params : r2 = address of aborted instruction
9 * Returns : r0 = address of abort
10 * : r1 = FSR, bit 11 = write
13 * : sp = pointer to registers
15 * Purpose : obtain information about current aborted instruction.
16 * Note: we read user space. This means we might cause a data
17 * abort here if the I-TLB and D-TLB aren't seeing the same
18 * picture. Unfortunately, this does happen. We live with it.
21 ENTRY(v5tj_early_abort)
22 mrc p15, 0, r1, c5, c0, 0 @ get FSR
23 mrc p15, 0, r0, c6, c0, 0 @ get FAR
24 bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR
25 tst r3, #PSR_J_BIT @ Java?
27 tst r3, #PSR_T_BIT @ Thumb?
28 ldrneh r3, [r2] @ read aborted thumb instruction
29 ldreq r3, [r2] @ read aborted ARM instruction
30 movne r3, r3, lsl #(21 - 12) @ move thumb bit 11 to ARM bit 20
31 tst r3, #1 << 20 @ L = 0 -> write
32 orreq r1, r1, #1 << 11 @ yes.