1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Routines to access the system control register
5 * Copyright (c) 2018 Heinrich Schuchardt
8 #include <linux/linkage.h>
11 * void allow_unaligned(void) - allow unaligned access
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.
17 ENTRY(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
22 ENDPROC(allow_unaligned)