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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-02-11 16:56:07 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-05-02 04:35:39 -0400
commit59ac59f6f1432aa9417d2592bdfd17c99804dd66 (patch)
treec4251d8827165d9eb926d77470a59fb196f998f8 /arch/arm/mach-vexpress/headsmp.S
parentfef88f10767cfd9f9b4eebb5d5490214c5e13ad5 (diff)
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.S39
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 @@
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 */
21ENTRY(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
28pen: 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
381: .long .
39 .long pen_release