diff options
author | Tomasz Figa <t.figa@samsung.com> | 2012-12-11 13:58:43 +0900 |
---|---|---|
committer | Tushar Behera <tushar.behera@linaro.org> | 2013-03-14 10:45:54 +0530 |
commit | 1ae87fe31851edeadfb2b5d562c7d9497f492664 (patch) | |
tree | a105de5741d4165fdf416a65062db3ba7f65bf66 /arch | |
parent | 79853c584ab6b791ef391f306db5dad9bc4f293d (diff) |
ARM: EXYNOS: Add support for Exynos secure firmware
Some Exynos-based boards contain secure firmware and must use firmware
operations to set up some hardware.
This patch adds firmware operations for Exynos secure firmware and a way
for board code and device tree to specify that they must be used.
Example of use:
In board code:
...MACHINE_START(...)
/* ... */
.init_early = exynos_firmware_init,
/* ... */
MACHINE_END
In device tree:
/ {
/* ... */
firmware@0203F000 {
compatible = "samsung,secure-firmware";
reg = <0x0203F000 0x1000>;
};
/* ... */
};
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>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-exynos/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/mach-exynos/common.h | 2 | ||||
-rw-r--r-- | arch/arm/mach-exynos/firmware.c | 70 | ||||
-rw-r--r-- | arch/arm/mach-exynos/mach-exynos4-dt.c | 1 |
4 files changed, 74 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile index 262ee214642a..6ae9179bf3f1 100644 --- a/arch/arm/mach-exynos/Makefile +++ b/arch/arm/mach-exynos/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_EXYNOS4_MCT) += mct.o obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o obj-$(CONFIG_ARCH_EXYNOS) += exynos-smc.o +obj-$(CONFIG_ARCH_EXYNOS) += firmware.o plus_sec := $(call as-instr,.arch_extension sec,+sec) AFLAGS_exynos-smc.o :=-Wa,-march=armv7-a$(plus_sec) diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h index 04744f9c120f..7733b612227e 100644 --- a/arch/arm/mach-exynos/common.h +++ b/arch/arm/mach-exynos/common.h @@ -22,6 +22,8 @@ void exynos4_restart(char mode, const char *cmd); void exynos5_restart(char mode, const char *cmd); void exynos_init_late(void); +void exynos_firmware_init(void); + #ifdef CONFIG_PM_GENERIC_DOMAINS int exynos_pm_late_initcall(void); #else diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c new file mode 100644 index 000000000000..ed11f100d479 --- /dev/null +++ b/arch/arm/mach-exynos/firmware.c @@ -0,0 +1,70 @@ +/* + * Copyright (C) 2012 Samsung Electronics. + * Kyungmin Park <kyungmin.park@samsung.com> + * Tomasz Figa <t.figa@samsung.com> + * + * 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/kernel.h> +#include <linux/io.h> +#include <linux/init.h> +#include <linux/of.h> +#include <linux/of_address.h> + +#include <asm/firmware.h> + +#include <mach/map.h> + +#include "smc.h" + +static int exynos_do_idle(void) +{ + exynos_smc(SMC_CMD_SLEEP, 0, 0, 0); + return 0; +} + +static int exynos_cpu_boot(int cpu) +{ + exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0); + return 0; +} + +static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr) +{ + void __iomem *boot_reg = S5P_VA_SYSRAM_NS + 0x1c + 4*cpu; + + __raw_writel(boot_addr, boot_reg); + return 0; +} + +static const struct firmware_ops exynos_firmware_ops = { + .do_idle = exynos_do_idle, + .set_cpu_boot_addr = exynos_set_cpu_boot_addr, + .cpu_boot = exynos_cpu_boot, +}; + +void __init exynos_firmware_init(void) +{ + if (of_have_populated_dt()) { + struct device_node *nd; + const __be32 *addr; + + nd = of_find_compatible_node(NULL, NULL, + "samsung,secure-firmware"); + if (!nd) + return; + + addr = of_get_address(nd, 0, NULL, NULL); + if (!addr) { + pr_err("%s: No address specified.\n", __func__); + return; + } + } + + pr_info("Running under secure firmware.\n"); + + register_firmware_ops(&exynos_firmware_ops); +} diff --git a/arch/arm/mach-exynos/mach-exynos4-dt.c b/arch/arm/mach-exynos/mach-exynos4-dt.c index 92757ff817ae..ab1dacc34095 100644 --- a/arch/arm/mach-exynos/mach-exynos4-dt.c +++ b/arch/arm/mach-exynos/mach-exynos4-dt.c @@ -108,6 +108,7 @@ DT_MACHINE_START(EXYNOS4210_DT, "Samsung Exynos4 (Flattened Device Tree)") .init_irq = exynos4_init_irq, .map_io = exynos4_dt_map_io, .handle_irq = gic_handle_irq, + .init_early = exynos_firmware_init, .init_machine = exynos4_dt_machine_init, .init_late = exynos_init_late, .timer = &exynos4_timer, |