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-rw-r--r--kernel/arch/arm/mach-socfpga/headsmp.S37
1 files changed, 37 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-socfpga/headsmp.S b/kernel/arch/arm/mach-socfpga/headsmp.S
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index 000000000..f65ea0af4
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+++ b/kernel/arch/arm/mach-socfpga/headsmp.S
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+/*
+ * Copyright (c) 2003 ARM Limited
+ * Copyright (c) u-boot contributors
+ * Copyright (c) 2012 Pavel Machek <pavel@denx.de>
+ *
+ * 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>
+#include <asm/memory.h>
+
+ .arch armv7-a
+
+ENTRY(secondary_trampoline)
+ /* CPU1 will always fetch from 0x0 when it is brought out of reset.
+ * Thus, we can just subtract the PAGE_OFFSET to get the physical
+ * address of &cpu1start_addr. This would not work for platforms
+ * where the physical memory does not start at 0x0.
+ */
+ adr r0, 1f
+ ldmia r0, {r1, r2}
+ sub r2, r2, #PAGE_OFFSET
+ ldr r3, [r2]
+ ldr r4, [r3]
+ bx r4
+
+ .align
+1: .long .
+ .long socfpga_cpu1start_addr
+ENTRY(secondary_trampoline_end)
+
+ENTRY(socfpga_secondary_startup)
+ bl v7_invalidate_l1
+ b secondary_startup
+ENDPROC(socfpga_secondary_startup)