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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-02-11 21:56:07 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-05-02 09:35:39 +0100 |
| commit | 59ac59f6f1432aa9417d2592bdfd17c99804dd66 (patch) | |
| tree | c4251d8827165d9eb926d77470a59fb196f998f8 /arch/arm/mach-vexpress/headsmp.S | |
| parent | fef88f10767cfd9f9b4eebb5d5490214c5e13ad5 (diff) | |
| download | linux-59ac59f6f1432aa9417d2592bdfd17c99804dd66.tar.bz2 | |
ARM: Add Versatile Express SMP support
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-vexpress/headsmp.S')
| -rw-r--r-- | arch/arm/mach-vexpress/headsmp.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/mach-vexpress/headsmp.S b/arch/arm/mach-vexpress/headsmp.S new file mode 100644 index 000000000000..8a78ff68e1ee --- /dev/null +++ b/arch/arm/mach-vexpress/headsmp.S @@ -0,0 +1,39 @@ +/* + * linux/arch/arm/mach-vexpress/headsmp.S + * + * Copyright (c) 2003 ARM Limited + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/linkage.h> +#include <linux/init.h> + + __INIT + +/* + * Versatile Express specific entry point for secondary CPUs. This + * provides a "holding pen" into which all secondary cores are held + * until we're ready for them to initialise. + */ +ENTRY(vexpress_secondary_startup) + mrc p15, 0, r0, c0, c0, 5 + and r0, r0, #15 + adr r4, 1f + ldmia r4, {r5, r6} + sub r4, r4, r5 + add r6, r6, r4 +pen: ldr r7, [r6] + cmp r7, r0 + bne pen + + /* + * we've been released from the holding pen: secondary_stack + * should now contain the SVC stack for this core + */ + b secondary_startup + +1: .long . + .long pen_release |