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[karo-tx-linux.git] / arch / arm / mach-sti / headsmp.S
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 /*
20  * ST specific entry point for secondary CPUs.  This provides
21  * a "holding pen" into which all secondary cores are held until we're
22  * ready for them to initialise.
23  */
24 ENTRY(sti_secondary_startup)
25         mrc     p15, 0, r0, c0, c0, 5
26         and     r0, r0, #15
27         adr     r4, 1f
28         ldmia   r4, {r5, r6}
29         sub     r4, r4, r5
30         add     r6, r6, r4
31 pen:    ldr     r7, [r6]
32         cmp     r7, r0
33         bne     pen
34
35         /*
36          * we've been released from the holding pen: secondary_stack
37          * should now contain the SVC stack for this core
38          */
39         b       secondary_startup
40 ENDPROC(sti_secondary_startup)
41
42 1:      .long   .
43         .long   pen_release