1/*
2 * Shared SCU setup for mach-shmobile
3 *
4 * Copyright (C) 2012 Bastian Hecht
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
19 * MA 02111-1307 USA
20 */
21
22#include <linux/linkage.h>
23#include <linux/init.h>
24#include <asm/memory.h>
25
26/*
27 * Boot code for secondary CPUs.
28 *
29 * First we turn on L1 cache coherency for our CPU. Then we jump to
30 * shmobile_invalidate_start that invalidates the cache and hands over control
31 * to the common ARM startup code.
32 */
33ENTRY(shmobile_boot_scu)
34					@ r0 = SCU base address
35	mrc     p15, 0, r1, c0, c0, 5	@ read MIPDR
36	and	r1, r1, #3		@ mask out cpu ID
37	lsl	r1, r1, #3		@ we will shift by cpu_id * 8 bits
38	ldr	r2, [r0, #8]		@ SCU Power Status Register
39	mov	r3, #3
40	bic	r2, r2, r3, lsl r1	@ Clear bits of our CPU (Run Mode)
41	str	r2, [r0, #8]		@ write back
42
43	b	shmobile_invalidate_start
44ENDPROC(shmobile_boot_scu)
45
46	.text
47	.globl	shmobile_scu_base
48shmobile_scu_base:
49	.space	4
50