cns3xxx: add linux 3.8 support and use it by default
[openwrt.git] / target / linux / cns3xxx / files / arch / arm / mach-cns3xxx / headsmp.S
1 /*
2  *  linux/arch/arm/mach-cns3xxx/headsmp.S
3  *
4  *  Cloned from linux/arch/arm/plat-versatile/headsmp.S
5  *
6  *  Copyright (c) 2003 ARM Limited
7  *  All Rights Reserved
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation.
12  */
13 #include <linux/linkage.h>
14 #include <linux/init.h>
15
16         __CPUINIT
17
18 /*
19  * CNS3XXX 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  */
23 ENTRY(cns3xxx_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
30 pen:    ldr     r7, [r6]
31         cmp     r7, r0
32         bne     pen
33
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
39
40         .align
41 1:      .long   .
42         .long   pen_release