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Changhwan Youn2b12b5c2010-07-26 21:08:52 +09001/*
Changhwan Youn2b12b5c2010-07-26 21:08:52 +09002 *
3 * Cloned from linux/arch/arm/mach-realview/headsmp.S
4 *
5 * Copyright (c) 2003 ARM Limited
6 * All Rights Reserved
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#include <linux/linkage.h>
13#include <linux/init.h>
14
Changhwan Youn2b12b5c2010-07-26 21:08:52 +090015/*
Kukjin Kim7d30e8b2011-02-14 16:33:10 +090016 * exynos4 specific entry point for secondary CPUs. This provides
Changhwan Youn2b12b5c2010-07-26 21:08:52 +090017 * a "holding pen" into which all secondary cores are held until we're
18 * ready for them to initialise.
19 */
Kukjin Kim7d30e8b2011-02-14 16:33:10 +090020ENTRY(exynos4_secondary_startup)
Changhwan Youn2b12b5c2010-07-26 21:08:52 +090021 mrc p15, 0, r0, c0, c0, 5
22 and r0, r0, #15
23 adr r4, 1f
24 ldmia r4, {r5, r6}
25 sub r4, r4, r5
26 add r6, r6, r4
27pen: ldr r7, [r6]
28 cmp r7, r0
29 bne pen
30
31 /*
32 * we've been released from the holding pen: secondary_stack
33 * should now contain the SVC stack for this core
34 */
35 b secondary_startup
Rob Herringf7597c02012-01-09 15:39:19 -060036ENDPROC(exynos4_secondary_startup)
Changhwan Youn2b12b5c2010-07-26 21:08:52 +090037
Rob Herringf7597c02012-01-09 15:39:19 -060038 .align 2
Changhwan Youn2b12b5c2010-07-26 21:08:52 +0900391: .long .
40 .long pen_release