ARM: OMAP4: SMP: Add OMAP4430 SMP board files

This patch adds SMP platform files support for OMAP4430SDP. TI's OMAP4430
SOC is based on ARM Cortex-A9 SMP architecture. It's a dual core SOC
with GIC used for interrupt handling and SCU for cache coherency.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap-headsmp.S b/arch/arm/mach-omap2/omap-headsmp.S
new file mode 100644
index 000000000000..4afadba09477
--- /dev/null
+++ b/arch/arm/mach-omap2/omap-headsmp.S
@@ -0,0 +1,46 @@
+/*
+ * Secondary CPU startup routine source file.
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author:
+ *      Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * Interface functions needed for the SMP. This file is based on arm
+ * realview smp platform.
+ * Copyright (c) 2003 ARM Limited.
+ *
+ * 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>
+
+/* Physical address needed since MMU not enabled yet on secondary core */
+#define OMAP4_AUX_CORE_BOOT1_PA                 0x48281804
+
+        __INIT
+
+/*
+ * OMAP4 specific entry point for secondary CPU to jump from ROM
+ * code.  This routine also provides a holding flag into which
+ * secondary core is held until we're ready for it to initialise.
+ * The primary core will update the this flag using a hardware
+ * register AuxCoreBoot1.
+ */
+ENTRY(omap_secondary_startup)
+        mrc     p15, 0, r0, c0, c0, 5
+        and     r0, r0, #0x0f
+hold:   ldr     r1, =OMAP4_AUX_CORE_BOOT1_PA    @ read from AuxCoreBoot1
+        ldr     r2, [r1]
+        cmp     r2, r0
+        bne     hold
+
+        /*
+         * we've been released from the cpu_release,secondary_stack
+         * should now contain the SVC stack for this core
+         */
+        b       secondary_startup
+