1#include <linux/linkage.h>
 2#include <asm/assembler.h>
 3#include "abort-macro.S"
 4/*
 5 * Function: v5tj_early_abort
 6 *
 7 * Params  : r2 = pt_regs
 8 *	   : r4 = aborted context pc
 9 *	   : r5 = aborted context psr
10 *
11 * Returns : r4 - r11, r13 preserved
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
19ENTRY(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
23	tst	r5, #PSR_J_BIT			@ Java?
24	bne	do_DataAbort
25	do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3
26	ldreq	r3, [r4]			@ read aborted ARM instruction
27	do_ldrd_abort tmp=ip, insn=r3
 
 
28	tst	r3, #1 << 20			@ L = 0 -> write
29	orreq	r1, r1, #1 << 11		@ yes.
30	b	do_DataAbort

 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: v5tj_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 aborted instruction.
15 * Note: we read user space.  This means we might cause a data
16 * abort here if the I-TLB and D-TLB aren't seeing the same
17 * picture.  Unfortunately, this does happen.  We live with it.
18 */
19	.align	5
20ENTRY(v5tj_early_abort)
21	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
22	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
23	bic	r1, r1, #1 << 11 | 1 << 10	@ clear bits 11 and 10 of FSR
24	tst	r5, #PSR_J_BIT			@ Java?
25	bne	do_DataAbort
26	do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3
27	ldreq	r3, [r4]			@ read aborted ARM instruction
28	uaccess_disable ip			@ disable userspace access
29	teq_ldrd tmp=ip, insn=r3		@ insn was LDRD?
30	beq	do_DataAbort			@ yes
31	tst	r3, #1 << 20			@ L = 0 -> write
32	orreq	r1, r1, #1 << 11		@ yes.
33	b	do_DataAbort