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authorSantosh Shilimkar <santosh.shilimkar@ti.com>2009-04-28 17:21:52 +0200
committerSantosh Shilimkar <santosh.shilimkar@ti.com>2009-06-09 09:33:50 +0200
commit367cd31ee0cbc948fe3b83960b1dbf931e2eaa90 (patch)
tree7d9c666fa6da3efb4e206c9f6b5fc4200320e498 /arch/arm/plat-omap
parentMerge branch 'smp' into devel (diff)
downloadlinux-367cd31ee0cbc948fe3b83960b1dbf931e2eaa90.tar.xz
linux-367cd31ee0cbc948fe3b83960b1dbf931e2eaa90.zip
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>
Diffstat (limited to 'arch/arm/plat-omap')
-rw-r--r--arch/arm/plat-omap/include/mach/smp.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/mach/smp.h b/arch/arm/plat-omap/include/mach/smp.h
new file mode 100644
index 000000000000..dcaa8fde7063
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/smp.h
@@ -0,0 +1,51 @@
+/*
+ * OMAP4 machine specific smp.h
+ *
+ * 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.
+ */
+#ifndef OMAP_ARCH_SMP_H
+#define OMAP_ARCH_SMP_H
+
+#include <asm/hardware/gic.h>
+
+/*
+ * set_event() is used to wake up secondary core from wfe using sev. ROM
+ * code puts the second core into wfe(standby).
+ *
+ */
+#define set_event() __asm__ __volatile__ ("sev" : : : "memory")
+
+/* Needed for secondary core boot */
+extern void omap_secondary_startup(void);
+
+/*
+ * We use Soft IRQ1 as the IPI
+ */
+static inline void smp_cross_call(const struct cpumask *mask)
+{
+ gic_raise_softirq(mask, 1);
+}
+
+/*
+ * Read MPIDR: Multiprocessor affinity register
+ */
+#define hard_smp_processor_id() \
+ ({ \
+ unsigned int cpunum; \
+ __asm__("mrc p15, 0, %0, c0, c0, 5" \
+ : "=r" (cpunum)); \
+ cpunum &= 0x0F; \
+ })
+
+#endif