[linux-2.6-block.git] / arch / arm / plat-versatile / headsmp.S

/*
 *  linux/arch/arm/plat-versatile/headsmp.S
 *
 *  Copyright (c) 2003 ARM Limited
 *  All Rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>

/*
 * Realview/Versatile Express 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(versatile_secondary_startup)
 ARM_BE8(setend	be)
	mrc	p15, 0, r0, c0, c0, 5
	bic	r0, #0xff000000
	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

	.align
1:	.long	.
	.long	pen_release
ENDPROC(versatile_secondary_startup)
Commit	Line	Data
59ac59f6	1	/*
0462b447	2	* linux/arch/arm/plat-versatile/headsmp.S
59ac59f6 RK	3	*
	4	* Copyright (c) 2003 ARM Limited
	5	* All Rights Reserved
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	#include <linux/linkage.h>
	12	#include <linux/init.h>
98dec91f	13	#include <asm/assembler.h>
59ac59f6	14
59ac59f6	15	/*
0462b447 RK	16	* Realview/Versatile Express specific entry point for secondary CPUs.
0462b447 RK	17	* This provides a "holding pen" into which all secondary cores are held
59ac59f6 RK	18	* until we're ready for them to initialise.
59ac59f6 RK	19	*/
0462b447	20	ENTRY(versatile_secondary_startup)
98dec91f	21	ARM_BE8(setend be)
59ac59f6	22	mrc p15, 0, r0, c0, c0, 5
1585defb	23	bic r0, #0xff000000
59ac59f6 RK	24	adr r4, 1f
	25	ldmia r4, {r5, r6}
	26	sub r4, r4, r5
	27	add r6, r6, r4
	28	pen: ldr r7, [r6]
	29	cmp r7, r0
	30	bne pen
	31
	32	/*
	33	* we've been released from the holding pen: secondary_stack
	34	* should now contain the SVC stack for this core
	35	*/
	36	b secondary_startup
	37
618d9c8f	38	.align
59ac59f6 RK	39	1: .long .
59ac59f6 RK	40	.long pen_release
764a579f	41	ENDPROC(versatile_secondary_startup)