/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/linkage.h>
#include <asm/assembler.h>
/*
 * Function: v4_early_abort
 *
 * Params  : r2 = pt_regs
 *         : r4 = aborted context pc
 *         : r5 = aborted context psr
 *
 * Returns : r4 - r11, r13 preserved
 *
 * Purpose : obtain information about current aborted instruction.
 * Note: we read user space.  This means we might cause a data
 * abort here if the I-TLB and D-TLB aren't seeing the same
 * picture.  Unfortunately, this does happen.  We live with it.
 */
        .align  5
ENTRY(v4_early_abort)
        mrc     p15, 0, r1, c5, c0, 0           @ get FSR
        mrc     p15, 0, r0, c6, c0, 0           @ get FAR
        ldr     r3, [r4]                        @ read aborted ARM instruction
        uaccess_disable ip                      @ disable userspace access
        bic     r1, r1, #1 << 11 | 1 << 10      @ clear bits 11 and 10 of FSR
        tst     r3, #1 << 20                    @ L = 1 -> write?
        orreq   r1, r1, #1 << 11                @ yes.
        b       do_DataAbort