1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/linkage.h>
3 #include <asm/assembler.h>
4 #include "abort-macro.S"
5 /*
6 * Function: v5t_early_abort
7 *
8 * Params : r2 = pt_regs
9 * : r4 = aborted context pc
10 * : r5 = aborted context psr
11 *
12 * Returns : r4 - r11, r13 preserved
13 *
14 * Purpose : obtain information about current
15 * Note: we read user space. This means we mi
16 * abort here if the I-TLB and D-TLB aren't se
17 * picture. Unfortunately, this does happen.
18 */
19 .align 5
20 ENTRY(v5t_early_abort)
21 mrc p15, 0, r1, c5, c0, 0
22 mrc p15, 0, r0, c6, c0, 0
23 do_thumb_abort fsr=r1, pc=r4, psr=r5,
24 ldreq r3, [r4]
25 uaccess_disable ip
26 bic r1, r1, #1 << 11
27 teq_ldrd tmp=ip, insn=r3
28 beq do_DataAbort
29 tst r3, #1 << 20
30 orreq r1, r1, #1 << 11
31 b do_DataAbort
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