1/*
2 * arch/arm/mach-spear13XX/headsmp.S
3 *
4 * Picked from realview
5 * Copyright (c) 2012 ST Microelectronics Limited
6 * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/linkage.h>
14#include <linux/init.h>
15
16	__INIT
17
18/*
19 * spear13xx specific entry point for secondary CPUs. This provides
20 * a "holding pen" into which all secondary cores are held until we're
21 * ready for them to initialise.
22 */
23ENTRY(spear13xx_secondary_startup)
24	mrc	p15, 0, r0, c0, c0, 5
25	and	r0, r0, #15
26	adr	r4, 1f
27	ldmia	r4, {r5, r6}
28	sub	r4, r4, r5
29	add	r6, r6, r4
30pen:	ldr	r7, [r6]
31	cmp	r7, r0
32	bne	pen
33
34	/* re-enable coherency */
35	mrc	p15, 0, r0, c1, c0, 1
36	orr	r0, r0, #(1 << 6) | (1 << 0)
37	mcr	p15, 0, r0, c1, c0, 1
38	/*
39	 * we've been released from the holding pen: secondary_stack
40	 * should now contain the SVC stack for this core
41	 */
42	b	secondary_startup
43
44	.align
451:	.long	.
46	.long	pen_release
47ENDPROC(spear13xx_secondary_startup)
48