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862184fe RK |
1 | /* |
2 | * linux/arch/arm/mach-realview/headsmp.S | |
3 | * | |
4 | * Copyright (c) 2003 ARM Limited | |
5 | * All Rights Reserved | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/linkage.h> | |
12 | #include <linux/init.h> | |
13 | ||
14 | __INIT | |
15 | ||
16 | /* | |
17 | * Realview specific entry point for secondary CPUs. This provides | |
18 | * a "holding pen" into which all secondary cores are held until we're | |
19 | * ready for them to initialise. | |
20 | */ | |
21 | ENTRY(realview_secondary_startup) | |
22 | mrc p15, 0, r0, c0, c0, 5 | |
23 | and r0, r0, #15 | |
24 | adr r4, 1f | |
25 | ldmia r4, {r5, r6} | |
26 | sub r4, r4, r5 | |
27 | add r6, r6, r4 | |
28 | pen: ldr r7, [r6] | |
29 | cmp r7, r0 | |
30 | bne pen | |
31 | ||
32 | /* | |
33 | * we've been released from the holding pen: secondary_stack | |
34 | * should now contain the SVC stack for this core | |
35 | */ | |
36 | b secondary_startup | |
37 | ||
38 | 1: .long . | |
39 | .long pen_release |