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1 /*
2  *  arch/arm/mach-sti/headsmp.S
3  *
4  * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
5  *              http://www.st.com
6  *
7  * Cloned from linux/arch/arm/mach-vexpress/headsmp.S
8  *
9  *  Copyright (c) 2003 ARM Limited
10  *  All Rights Reserved
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License version 2 as
14  * published by the Free Software Foundation.
15  */
16 #include <linux/linkage.h>
17 #include <linux/init.h>
18
19         __INIT
20
21 /*
22  * ST specific entry point for secondary CPUs.  This provides
23  * a "holding pen" into which all secondary cores are held until we're
24  * ready for them to initialise.
25  */
26 ENTRY(sti_secondary_startup)
27         mrc     p15, 0, r0, c0, c0, 5
28         and     r0, r0, #15
29         adr     r4, 1f
30         ldmia   r4, {r5, r6}
31         sub     r4, r4, r5
32         add     r6, r6, r4
33 pen:    ldr     r7, [r6]
34         cmp     r7, r0
35         bne     pen
36
37         /*
38          * we've been released from the holding pen: secondary_stack
39          * should now contain the SVC stack for this core
40          */
41         b       secondary_startup
42
43 1:      .long   .
44         .long   pen_release