| Russell King | 59ac59f | 2010-02-11 21:56:07 +0000 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-vexpress/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 | * Versatile Express specific entry point for secondary CPUs. This |
| 18 | * provides a "holding pen" into which all secondary cores are held |
| 19 | * until we're ready for them to initialise. |
| 20 | */ |
| 21 | ENTRY(vexpress_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 |