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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-11-07 21:05:42 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-11-07 21:05:42 +0000
commit862184fe013146a0d9654a5598c5a2691747541c (patch)
tree0f3f0d46c79c7eae3d504c0e1be9ff923f1b2e36 /arch/arm/mach-realview/headsmp.S
parentfea543f47733cc843cd74d95065ed1d4a04b38ed (diff)
[ARM SMP] Add Realview MPcore SMP support
Add SMP support for the MPcore tile fitted to the Realview ARM platform. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-realview/headsmp.S')
-rw-r--r--arch/arm/mach-realview/headsmp.S39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/mach-realview/headsmp.S b/arch/arm/mach-realview/headsmp.S
new file mode 100644
index 00000000000..4075473cf68
--- /dev/null
+++ b/arch/arm/mach-realview/headsmp.S
@@ -0,0 +1,39 @@
+/*
+ * linux/arch/arm/mach-realview/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
+
+/*
+ * Realview 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(realview_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