Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / mach-ux500 / headsmp.S

diff --git a/kernel/arch/arm/mach-ux500/headsmp.S b/kernel/arch/arm/mach-ux500/headsmp.S
new file mode 100644 (file)
index 0000000..9cdea04
--- /dev/null
+++ b/kernel/arch/arm/mach-ux500/headsmp.S
@@ -0,0 +1,37 @@
+/*
+ *  Copyright (c) 2009 ST-Ericsson
+ *     This file is based  ARM Realview platform
+ *  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>
+
+/*
+ * U8500 specific entry point for secondary CPUs.
+ */
+ENTRY(u8500_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
+ENDPROC(u8500_secondary_startup)
+
+       .align 2
+1:     .long   .
+       .long   pen_release