From: Tomasz Figa <t.figa@samsung.com>
Date: Tue, 11 Dec 2012 04:58:43 +0000 (+0900)
Subject: ARM: EXYNOS: Add support for secure monitor calls
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a4a18d2b3a9245ac43eec1e2eddd6b929b8f0bb9;p=linux-beck.git

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 d2f6b362b6dd..5567bf7d04ba 100644
--- 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
index 000000000000..2e27aa3813fd
--- /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
index 000000000000..13a1dc8ecbf2
--- /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