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59ac59f6 | 1 | /* |
0462b447 | 2 | * linux/arch/arm/plat-versatile/headsmp.S |
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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 | ||
59ac59f6 | 14 | /* |
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15 | * Realview/Versatile Express specific entry point for secondary CPUs. |
16 | * This provides a "holding pen" into which all secondary cores are held | |
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17 | * until we're ready for them to initialise. |
18 | */ | |
0462b447 | 19 | ENTRY(versatile_secondary_startup) |
59ac59f6 | 20 | mrc p15, 0, r0, c0, c0, 5 |
1585defb | 21 | bic r0, #0xff000000 |
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22 | adr r4, 1f |
23 | ldmia r4, {r5, r6} | |
24 | sub r4, r4, r5 | |
25 | add r6, r6, r4 | |
26 | pen: ldr r7, [r6] | |
27 | cmp r7, r0 | |
28 | bne pen | |
29 | ||
30 | /* | |
31 | * we've been released from the holding pen: secondary_stack | |
32 | * should now contain the SVC stack for this core | |
33 | */ | |
34 | b secondary_startup | |
35 | ||
618d9c8f | 36 | .align |
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37 | 1: .long . |
38 | .long pen_release | |
764a579f | 39 | ENDPROC(versatile_secondary_startup) |