blob: 40f27e52de759aed3ab7d3f7e912bf4feab3a358 [file] [log] [blame]
rjw1f884582022-01-06 17:20:42 +08001/*
2 * linux/arch/arm/plat-versatile/headsmp.S
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>
13#include <asm/assembler.h>
14
15/*
16 * Realview/Versatile Express specific entry point for secondary CPUs.
17 * This provides a "holding pen" into which all secondary cores are held
18 * until we're ready for them to initialise.
19 */
20ENTRY(versatile_secondary_startup)
21 ARM_BE8(setend be)
22 mrc p15, 0, r0, c0, c0, 5
23 bic r0, #0xff000000
24 adr r4, 1f
25 ldmia r4, {r5, r6}
26 sub r4, r4, r5
27 add r6, r6, r4
28pen: 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
38 .align
391: .long .
40 .long pen_release
41ENDPROC(versatile_secondary_startup)