headsmp.S

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  Copyright (c) 2003 ARM Limited
 4 *  All Rights Reserved
 5 */
 6#include <linux/linkage.h>
 7#include <linux/init.h>
 8#include <asm/assembler.h>
 9
10/*
11 * Realview/Versatile Express specific entry point for secondary CPUs.
12 * This provides a "holding pen" into which all secondary cores are held
13 * until we're ready for them to initialise.
14 */
15ENTRY(versatile_secondary_startup)
16 ARM_BE8(setend	be)
17	mrc	p15, 0, r0, c0, c0, 5
18	bic	r0, #0xff000000
19	adr	r4, 1f
20	ldmia	r4, {r5, r6}
21	sub	r4, r4, r5
22	add	r6, r6, r4
23pen:	ldr	r7, [r6]
24	cmp	r7, r0
25	bne	pen
26
27	/*
28	 * we've been released from the holding pen: secondary_stack
29	 * should now contain the SVC stack for this core
30	 */
31	b	secondary_startup
32
33	.align
341:	.long	.
35	.long	versatile_cpu_release
36ENDPROC(versatile_secondary_startup)