1/* SPDX-License-Identifier:     GPL-2.0+ */
2/*
3 *  Routines to access the system control register
4 *
5 *  Copyright (c) 2018 Heinrich Schuchardt
6 */
7
8#include <linux/linkage.h>
9
10/*
11 * void allow_unaligned(void) - allow unaligned access
12 *
13 * This routine clears the aligned flag in the system control register.
14 * After calling this routine unaligned access does no longer lead to a
15 * data abort but is handled by the CPU.
16 */
17ENTRY(allow_unaligned)
18	mrc	p15, 0, r0, c1, c0, 0	@ load system control register
19	bic	r0, r0, #2		@ clear aligned flag
20	mcr	p15, 0, r0, c1, c0, 0	@ write system control register
21	bx	lr			@ return
22ENDPROC(allow_unaligned)
23