ARM: realview/vexpress: consolidate SMP bringup code

[pandora-kernel.git] / arch / arm / plat-versatile / headsmp.S

diff --git a/arch/arm/plat-versatile/headsmp.S b/arch/arm/plat-versatile/headsmp.S
new file mode 100644 (file)
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--- /dev/null
+++ b/arch/arm/plat-versatile/headsmp.S
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+/*
+ *  linux/arch/arm/plat-versatile/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/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(versatile_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
+
+       .align
+1:     .long   .
+       .long   pen_release