1 /* SPDX-License-Identifier: GPL-2.0+
2 *
3 * Shared SCU setup for mach-shmobile
4 *
5 * Copyright (C) 2012 Bastian Hecht
6 */
7
8 #include <linux/linkage.h>
9 #include <linux/init.h>
10 #include <asm/page.h>
11
12 /*
13 * Boot code for secondary CPUs.
14 *
15 * First we turn on L1 cache coherency for our
16 * secondary_startup that invalidates the cach
17 * to the common ARM startup code.
18 */
19 ENTRY(shmobile_boot_scu)
20 @ r0 =
21 mrc p15, 0, r1, c0, c0, 5 @ read
22 and r1, r1, #3 @ mask
23 lsl r1, r1, #3 @ we w
24 ldr r2, [r0, #8] @ SCU
25 mov r3, #3
26 lsl r3, r3, r1
27 bic r2, r2, r3 @ Clea
28 str r2, [r0, #8] @ writ
29
30 b secondary_startup
31 ENDPROC(shmobile_boot_scu)
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