ARM: EXYNOS: Add support for secure monitor calls

Some boards use secure monitor calls to communicate with secure
firmware.

This patch adds exynos_smc function which uses smc assembly instruction
to do secure monitor calls.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index d2f6b36..5567bf7 100644 (file)
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -24,6 +24,11 @@ obj-$(CONFIG_SMP)            += platsmp.o headsmp.o
 
 obj-$(CONFIG_HOTPLUG_CPU)      += hotplug.o
 
+obj-$(CONFIG_ARCH_EXYNOS)      += exynos-smc.o
+
+plus_sec := $(call as-instr,.arch_extension sec,+sec)
+AFLAGS_exynos-smc.o            :=-Wa,-march=armv7-a$(plus_sec)
+
 # machine support
 
 obj-$(CONFIG_MACH_SMDKC210)            += mach-smdkv310.o

diff --git a/arch/arm/mach-exynos/exynos-smc.S b/arch/arm/mach-exynos/exynos-smc.S
new file mode 100644 (file)
index 0000000..2e27aa3
--- /dev/null
+++ b/arch/arm/mach-exynos/exynos-smc.S
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics.
+ *
+ * Copied from omap-smc.S Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * 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>
+
+/*
+ * Function signature: void exynos_smc(u32 cmd, u32 arg1, u32 arg2, u32 arg3)
+ */
+
+ENTRY(exynos_smc)
+       stmfd   sp!, {r4-r11, lr}
+       dsb
+       smc     #0
+       ldmfd   sp!, {r4-r11, pc}
+ENDPROC(exynos_smc)

diff --git a/arch/arm/mach-exynos/smc.h b/arch/arm/mach-exynos/smc.h
new file mode 100644 (file)
index 0000000..13a1dc8
--- /dev/null
+++ b/arch/arm/mach-exynos/smc.h
@@ -0,0 +1,31 @@
+/*
+ *  Copyright (c) 2012 Samsung Electronics.
+ *
+ * EXYNOS - SMC Call
+ *
+ * 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 __ASM_ARCH_EXYNOS_SMC_H
+#define __ASM_ARCH_EXYNOS_SMC_H
+
+#define SMC_CMD_INIT           (-1)
+#define SMC_CMD_INFO           (-2)
+/* For Power Management */
+#define SMC_CMD_SLEEP          (-3)
+#define SMC_CMD_CPU1BOOT       (-4)
+#define SMC_CMD_CPU0AFTR       (-5)
+/* For CP15 Access */
+#define SMC_CMD_C15RESUME      (-11)
+/* For L2 Cache Access */
+#define SMC_CMD_L2X0CTRL       (-21)
+#define SMC_CMD_L2X0SETUP1     (-22)
+#define SMC_CMD_L2X0SETUP2     (-23)
+#define SMC_CMD_L2X0INVALL     (-24)
+#define SMC_CMD_L2X0DEBUG      (-25)
+
+extern void exynos_smc(u32 cmd, u32 arg1, u32 arg2, u32 arg3);
+
+#endif