1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * arch/arm/mach-spear13XX/headsmp.S
4 *
5 * Picked from realview
6 * Copyright (c) 2012 ST Microelectronics Limited
7 * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
8 */
9
10#include <linux/linkage.h>
11#include <linux/init.h>
12
13#include <asm/assembler.h>
14
15	__INIT
16
17/*
18 * spear13xx specific entry point for secondary CPUs. This provides
19 * a "holding pen" into which all secondary cores are held until we're
20 * ready for them to initialise.
21 */
22ENTRY(spear13xx_secondary_startup)
23	mrc	p15, 0, r0, c0, c0, 5
24	and	r0, r0, #15
25	adr_l	r6, spear_pen_release
26pen:	ldr	r7, [r6]
27	cmp	r7, r0
28	bne	pen
29
30	/* re-enable coherency */
31	mrc	p15, 0, r0, c1, c0, 1
32	orr	r0, r0, #(1 << 6) | (1 << 0)
33	mcr	p15, 0, r0, c1, c0, 1
34	/*
35	 * we've been released from the holding pen: secondary_stack
36	 * should now contain the SVC stack for this core
37	 */
38	b	secondary_startup
39ENDPROC(spear13xx_secondary_startup)
40