[linux-2.6-block.git] / arch / arm / mach-exynos / headsmp.S

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  Cloned from linux/arch/arm/mach-realview/headsmp.S
 *
 *  Copyright (c) 2003 ARM Limited
 *  All Rights Reserved
 */
#include <linux/linkage.h>
#include <linux/init.h>

#include <asm/assembler.h>

/*
 * exynos4 specific entry point for secondary CPUs.  This provides
 * a "holding pen" into which all secondary cores are held until we're
 * ready for them to initialise.
 */
ENTRY(exynos4_secondary_startup)
ARM_BE8(setend	be)
	mrc	p15, 0, r0, c0, c0, 5
	and	r0, r0, #15
	adr	r4, 1f
	ldmia	r4, {r5, r6}
	sub	r4, r4, r5
	add	r6, r6, r4
pen:	ldr	r7, [r6]
	cmp	r7, r0
	bne	pen

	/*
	 * we've been released from the holding pen: secondary_stack
	 * should now contain the SVC stack for this core
	 */
	b	secondary_startup
ENDPROC(exynos4_secondary_startup)

	.align 2
1:	.long	.
	.long	pen_release
Commit	Line	Data
347863d4	1	/* SPDX-License-Identifier: GPL-2.0 */
2b12b5c4	2	/*
2b12b5c4 CY	3	* Cloned from linux/arch/arm/mach-realview/headsmp.S
	4	*
	5	* Copyright (c) 2003 ARM Limited
	6	* All Rights Reserved
2b12b5c4 CY	7	*/
	8	#include <linux/linkage.h>
	9	#include <linux/init.h>
	10
458ad21d BD	11	#include <asm/assembler.h>
458ad21d BD	12
2b12b5c4	13	/*
7d30e8b3	14	* exynos4 specific entry point for secondary CPUs. This provides
2b12b5c4 CY	15	* a "holding pen" into which all secondary cores are held until we're
	16	* ready for them to initialise.
	17	*/
7d30e8b3	18	ENTRY(exynos4_secondary_startup)
458ad21d	19	ARM_BE8(setend be)
2b12b5c4 CY	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
	26	pen: 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
f7597c02	35	ENDPROC(exynos4_secondary_startup)
2b12b5c4	36
f7597c02	37	.align 2
2b12b5c4 CY	38	1: .long .
2b12b5c4 CY	39	.long pen_release