1#include <linux/linkage.h>
2#include <asm/assembler.h>
3/*
4 * Function: v4_early_abort
5 *
6 * Params  : r2 = address of aborted instruction
7 *         : r3 = saved SPSR
8 *
9 * Returns : r0 = address of abort
10 *	   : r1 = FSR, bit 11 = write
11 *	   : r2-r8 = corrupted
12 *	   : r9 = preserved
13 *	   : sp = pointer to registers
14 *
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.
19 */
20	.align	5
21ENTRY(v4_early_abort)
22	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
23	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
24	ldr	r3, [r2]			@ read aborted ARM instruction
25	bic	r1, r1, #1 << 11 | 1 << 10	@ clear bits 11 and 10 of FSR
26	tst	r3, #1 << 20			@ L = 1 -> write?
27	orreq	r1, r1, #1 << 11		@ yes.
28	mov	pc, lr
29