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: v6_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 .arch armv6k
20 .align 5
21 ENTRY(v6_early_abort)
22 mrc p15, 0, r1, c5, c0, 0
23 mrc p15, 0, r0, c6, c0, 0
24 /*
25 * Faulty SWP instruction on 1136 doesn't set
26 */
27 #ifdef CONFIG_ARM_ERRATA_326103
28 ldr ip, =0x4107b36
29 mrc p15, 0, r3, c0, c0, 0
30 teq ip, r3, lsr #4
31 bne 1f
32 tst r5, #PSR_J_BIT
33 tsteq r5, #PSR_T_BIT
34 bne 1f
35 bic r1, r1, #1 << 11
36 ldr r3, [r4]
37 ARM_BE8(rev r3, r3)
38
39 teq_ldrd tmp=ip, insn=r3
40 beq 1f
41 tst r3, #1 << 20
42 orreq r1, r1, #1 << 11
43 #endif
44 1: uaccess_disable ip
45 b do_DataAbort
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