1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 *  Cloned from linux/arch/arm/mach-realview/headsmp.S
4 *
5 *  Copyright (c) 2003 ARM Limited
6 *  All Rights Reserved
7 */
8#include <linux/linkage.h>
9#include <linux/init.h>
10
11#include <asm/assembler.h>
12
13/*
14 * exynos4 specific entry point for secondary CPUs.  This provides
15 * a "holding pen" into which all secondary cores are held until we're
16 * ready for them to initialise.
17 */
18ENTRY(exynos4_secondary_startup)
19ARM_BE8(setend	be)
20	mrc	p15, 0, r0, c0, c0, 5
21	and	r0, r0, #15
22	adr	r4, 1f
23	ldmia	r4, {r5, r6}
24	sub	r4, r4, r5
25	add	r6, r6, r4
26pen:	ldr	r7, [r6]
27	cmp	r7, r0
28	bne	pen
29
30	/*
31	 * we've been released from the holding pen: secondary_stack
32	 * should now contain the SVC stack for this core
33	 */
34	b	secondary_startup
35ENDPROC(exynos4_secondary_startup)
36
37	.align 2
381:	.long	.
39	.long	exynos_pen_release
40