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ARM: EXYNOS: Add support for secure monitor calls

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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>
This commit is contained in:
Tomasz Figa 2012-12-11 13:58:43 +09:00 committed by Kukjin Kim
parent 7366b92a77
commit a4a18d2b3a
3 changed files with 58 additions and 0 deletions
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5
arch/arm/mach-exynos/Makefile
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@ -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

22
arch/arm/mach-exynos/exynos-smc.S Normal file
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@ -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)

31
arch/arm/mach-exynos/smc.h Normal file
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@ -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