* [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support
@ 2012-10-25 15:22 Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 1/6] ARM: Add interface for registering and calling firmware-specific operations Tomasz Figa
` (6 more replies)
0 siblings, 7 replies; 17+ messages in thread
From: Tomasz Figa @ 2012-10-25 15:22 UTC (permalink / raw)
To: linux-arm-kernel
Some Exynos-based boards are running with secure firmware running in
TrustZone secure world, which changes the way some things have to be
initialized.
This series adds support for specifying firmware operations, implements
some firmware operations for Exynos secure firmware and adds a method of
enabling secure firmware operations on Exynos-based boards through board
file and device tree.
Changes since v2
( http://thread.gmane.org/gmane.linux.kernel.samsung-soc/12848 )
- Made Exynos firmware binding require address
- Minor style fixes
Changes since v1
( http://thread.gmane.org/gmane.linux.kernel.samsung-soc/12583/focus=12820 )
- Changed return types of all operations to int
- Defined all operations to return 0 on success, -ENOSYS when not
implemented or appropriate error code on error
Tomasz Figa (6):
ARM: Add interface for registering and calling firmware-specific
operations
ARM: EXYNOS: Add support for secure monitor calls
ARM: EXYNOS: Add IO mapping for non-secure SYSRAM.
ARM: EXYNOS: Add support for Exynos secure firmware
ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412
ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up
.../devicetree/bindings/arm/samsung-boards.txt | 10 ++++
arch/arm/common/Makefile | 2 +
arch/arm/common/firmware.c | 18 ++++++
arch/arm/include/asm/firmware.h | 31 ++++++++++
arch/arm/mach-exynos/Makefile | 6 ++
arch/arm/mach-exynos/common.c | 35 +++++++++++
arch/arm/mach-exynos/common.h | 2 +
arch/arm/mach-exynos/exynos-smc.S | 22 +++++++
arch/arm/mach-exynos/firmware.c | 67 ++++++++++++++++++++++
arch/arm/mach-exynos/include/mach/map.h | 3 +
arch/arm/mach-exynos/mach-exynos4-dt.c | 1 +
arch/arm/mach-exynos/platsmp.c | 37 ++++++++++--
arch/arm/mach-exynos/smc.h | 31 ++++++++++
arch/arm/plat-samsung/include/plat/map-s5p.h | 1 +
14 files changed, 260 insertions(+), 6 deletions(-)
create mode 100644 arch/arm/common/firmware.c
create mode 100644 arch/arm/include/asm/firmware.h
create mode 100644 arch/arm/mach-exynos/exynos-smc.S
create mode 100644 arch/arm/mach-exynos/firmware.c
create mode 100644 arch/arm/mach-exynos/smc.h
--
1.7.12
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 1/6] ARM: Add interface for registering and calling firmware-specific operations
2012-10-25 15:22 [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Tomasz Figa
@ 2012-10-25 15:22 ` Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 2/6] ARM: EXYNOS: Add support for secure monitor calls Tomasz Figa
` (5 subsequent siblings)
6 siblings, 0 replies; 17+ messages in thread
From: Tomasz Figa @ 2012-10-25 15:22 UTC (permalink / raw)
To: linux-arm-kernel
Some boards are running with secure firmware running in TrustZone secure
world, which changes the way some things have to be initialized.
This patch adds an interface for platforms to specify available firmware
operations and call them.
A wrapper macro, call_firmware_op(), checks if the operation is provided
and calls it if so, otherwise returns -ENOSYS to allow fallback to
legacy operation..
By default no operations are provided.
Example of use:
In code using firmware ops:
__raw_writel(virt_to_phys(exynos4_secondary_startup),
CPU1_BOOT_REG);
/* Call Exynos specific smc call */
if (call_firmware_op(cpu_boot, cpu) == -ENOSYS)
cpu_boot_legacy(...); /* Try legacy way */
gic_raise_softirq(cpumask_of(cpu), 1);
In board-/platform-specific code:
static int platformX_do_idle(void)
{
/* tell platformX firmware to enter idle */
return 0;
}
static int platformX_cpu_boot(int i)
{
/* tell platformX firmware to boot CPU i */
return 0;
}
static const struct firmware_ops platformX_firmware_ops = {
.do_idle = exynos_do_idle,
.cpu_boot = exynos_cpu_boot,
/* other operations not available on platformX */
};
static void __init board_init_early(void)
{
????????register_firmware_ops(&platformX_firmware_ops);
}
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
---
arch/arm/common/Makefile | 2 ++
arch/arm/common/firmware.c | 18 ++++++++++++++++++
arch/arm/include/asm/firmware.h | 31 +++++++++++++++++++++++++++++++
3 files changed, 51 insertions(+)
create mode 100644 arch/arm/common/firmware.c
create mode 100644 arch/arm/include/asm/firmware.h
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index e8a4e58..55d4182 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -2,6 +2,8 @@
# Makefile for the linux kernel.
#
+obj-y += firmware.o
+
obj-$(CONFIG_ARM_GIC) += gic.o
obj-$(CONFIG_ARM_VIC) += vic.o
obj-$(CONFIG_ICST) += icst.o
diff --git a/arch/arm/common/firmware.c b/arch/arm/common/firmware.c
new file mode 100644
index 0000000..27ddccb
--- /dev/null
+++ b/arch/arm/common/firmware.c
@@ -0,0 +1,18 @@
+/*
+ * 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/suspend.h>
+
+#include <asm/firmware.h>
+
+static const struct firmware_ops default_firmware_ops;
+
+const struct firmware_ops *firmware_ops = &default_firmware_ops;
diff --git a/arch/arm/include/asm/firmware.h b/arch/arm/include/asm/firmware.h
new file mode 100644
index 0000000..5d87d8e
--- /dev/null
+++ b/arch/arm/include/asm/firmware.h
@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+#ifndef __ASM_ARM_FIRMWARE_H
+#define __ASM_ARM_FIRMWARE_H
+
+struct firmware_ops {
+ int (*do_idle)(void);
+ int (*cpu_boot)(int cpu);
+ int (*cpu_boot_reg)(int cpu, void __iomem **ptr);
+ int (*l2x0_init)(void);
+};
+
+extern const struct firmware_ops *firmware_ops;
+
+#define call_firmware_op(op, ...) \
+ ((firmware_ops->op) ? firmware_ops->op(__VA_ARGS__) : (-ENOSYS))
+
+static inline void register_firmware_ops(const struct firmware_ops *ops)
+{
+ firmware_ops = ops;
+}
+
+#endif
--
1.7.12
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH v3 2/6] ARM: EXYNOS: Add support for secure monitor calls
2012-10-25 15:22 [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 1/6] ARM: Add interface for registering and calling firmware-specific operations Tomasz Figa
@ 2012-10-25 15:22 ` Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 3/6] ARM: EXYNOS: Add IO mapping for non-secure SYSRAM Tomasz Figa
` (4 subsequent siblings)
6 siblings, 0 replies; 17+ messages in thread
From: Tomasz Figa @ 2012-10-25 15:22 UTC (permalink / raw)
To: linux-arm-kernel
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>
---
arch/arm/mach-exynos/Makefile | 5 +++++
arch/arm/mach-exynos/exynos-smc.S | 22 ++++++++++++++++++++++
arch/arm/mach-exynos/smc.h | 31 +++++++++++++++++++++++++++++++
3 files changed, 58 insertions(+)
create mode 100644 arch/arm/mach-exynos/exynos-smc.S
create mode 100644 arch/arm/mach-exynos/smc.h
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index 9b58024..5c1de47 100644
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -30,6 +30,11 @@ obj-$(CONFIG_EXYNOS4_MCT) += mct.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 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
index 0000000..e972390
--- /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
--
1.7.12
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH v3 3/6] ARM: EXYNOS: Add IO mapping for non-secure SYSRAM.
2012-10-25 15:22 [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 1/6] ARM: Add interface for registering and calling firmware-specific operations Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 2/6] ARM: EXYNOS: Add support for secure monitor calls Tomasz Figa
@ 2012-10-25 15:22 ` Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 4/6] ARM: EXYNOS: Add support for Exynos secure firmware Tomasz Figa
` (3 subsequent siblings)
6 siblings, 0 replies; 17+ messages in thread
From: Tomasz Figa @ 2012-10-25 15:22 UTC (permalink / raw)
To: linux-arm-kernel
On TrustZone-enabled boards the non-secure SYSRAM is used for secondary
CPU bring-up, so add a mapping for it.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
---
arch/arm/mach-exynos/common.c | 35 ++++++++++++++++++++++++++++
arch/arm/mach-exynos/include/mach/map.h | 3 +++
arch/arm/plat-samsung/include/plat/map-s5p.h | 1 +
3 files changed, 39 insertions(+)
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 1947be8..cb891a7 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -215,6 +215,33 @@ static struct map_desc exynos4_iodesc1[] __initdata = {
},
};
+static struct map_desc exynos4210_iodesc[] __initdata = {
+ {
+ .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
+ .pfn = __phys_to_pfn(EXYNOS4210_PA_SYSRAM_NS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ },
+};
+
+static struct map_desc exynos4x12_iodesc[] __initdata = {
+ {
+ .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
+ .pfn = __phys_to_pfn(EXYNOS4x12_PA_SYSRAM_NS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ },
+};
+
+static struct map_desc exynos5250_iodesc[] __initdata = {
+ {
+ .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
+ .pfn = __phys_to_pfn(EXYNOS5250_PA_SYSRAM_NS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ },
+};
+
static struct map_desc exynos5_iodesc[] __initdata = {
{
.virtual = (unsigned long)S3C_VA_SYS,
@@ -322,6 +349,11 @@ static void __init exynos4_map_io(void)
else
iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
+ if (soc_is_exynos4210())
+ iotable_init(exynos4210_iodesc, ARRAY_SIZE(exynos4210_iodesc));
+ if (soc_is_exynos4212() || soc_is_exynos4412())
+ iotable_init(exynos4x12_iodesc, ARRAY_SIZE(exynos4x12_iodesc));
+
/* initialize device information early */
exynos4_default_sdhci0();
exynos4_default_sdhci1();
@@ -355,6 +387,9 @@ static void __init exynos5_map_io(void)
{
iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
+ if (soc_is_exynos5250())
+ iotable_init(exynos5250_iodesc, ARRAY_SIZE(exynos5250_iodesc));
+
s3c_device_i2c0.resource[0].start = EXYNOS5_PA_IIC(0);
s3c_device_i2c0.resource[0].end = EXYNOS5_PA_IIC(0) + SZ_4K - 1;
s3c_device_i2c0.resource[1].start = EXYNOS5_IRQ_IIC;
diff --git a/arch/arm/mach-exynos/include/mach/map.h b/arch/arm/mach-exynos/include/mach/map.h
index 8480849..42f4444 100644
--- a/arch/arm/mach-exynos/include/mach/map.h
+++ b/arch/arm/mach-exynos/include/mach/map.h
@@ -26,6 +26,9 @@
#define EXYNOS4_PA_SYSRAM0 0x02025000
#define EXYNOS4_PA_SYSRAM1 0x02020000
#define EXYNOS5_PA_SYSRAM 0x02020000
+#define EXYNOS4210_PA_SYSRAM_NS 0x0203F000
+#define EXYNOS4x12_PA_SYSRAM_NS 0x0204F000
+#define EXYNOS5250_PA_SYSRAM_NS 0x0204F000
#define EXYNOS4_PA_FIMC0 0x11800000
#define EXYNOS4_PA_FIMC1 0x11810000
diff --git a/arch/arm/plat-samsung/include/plat/map-s5p.h b/arch/arm/plat-samsung/include/plat/map-s5p.h
index c2d7bda..c186786 100644
--- a/arch/arm/plat-samsung/include/plat/map-s5p.h
+++ b/arch/arm/plat-samsung/include/plat/map-s5p.h
@@ -22,6 +22,7 @@
#define S5P_VA_GPIO3 S3C_ADDR(0x02280000)
#define S5P_VA_SYSRAM S3C_ADDR(0x02400000)
+#define S5P_VA_SYSRAM_NS S3C_ADDR(0x02410000)
#define S5P_VA_DMC0 S3C_ADDR(0x02440000)
#define S5P_VA_DMC1 S3C_ADDR(0x02480000)
#define S5P_VA_SROMC S3C_ADDR(0x024C0000)
--
1.7.12
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH v3 4/6] ARM: EXYNOS: Add support for Exynos secure firmware
2012-10-25 15:22 [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Tomasz Figa
` (2 preceding siblings ...)
2012-10-25 15:22 ` [PATCH v3 3/6] ARM: EXYNOS: Add IO mapping for non-secure SYSRAM Tomasz Figa
@ 2012-10-25 15:22 ` Tomasz Figa
2012-11-12 9:51 ` Russell King - ARM Linux
2012-10-25 15:22 ` [PATCH v3 5/6] ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412 Tomasz Figa
` (2 subsequent siblings)
6 siblings, 1 reply; 17+ messages in thread
From: Tomasz Figa @ 2012-10-25 15:22 UTC (permalink / raw)
To: linux-arm-kernel
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 at 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>
---
.../devicetree/bindings/arm/samsung-boards.txt | 10 ++++
arch/arm/mach-exynos/Makefile | 1 +
arch/arm/mach-exynos/common.h | 2 +
arch/arm/mach-exynos/firmware.c | 67 ++++++++++++++++++++++
arch/arm/mach-exynos/mach-exynos4-dt.c | 1 +
5 files changed, 81 insertions(+)
create mode 100644 arch/arm/mach-exynos/firmware.c
diff --git a/Documentation/devicetree/bindings/arm/samsung-boards.txt b/Documentation/devicetree/bindings/arm/samsung-boards.txt
index 0bf68be..2168ed3 100644
--- a/Documentation/devicetree/bindings/arm/samsung-boards.txt
+++ b/Documentation/devicetree/bindings/arm/samsung-boards.txt
@@ -6,3 +6,13 @@ Required root node properties:
- compatible = should be one or more of the following.
(a) "samsung,smdkv310" - for Samsung's SMDKV310 eval board.
(b) "samsung,exynos4210" - for boards based on Exynos4210 SoC.
+
+Optional:
+ - firmware node, specifying presence and type of secure firmware:
+ - compatible: only "samsung,secure-firmware" is currently supported
+ - reg: address of non-secure SYSRAM used for communication with firmware
+
+ firmware at 0203F000 {
+ compatible = "samsung,secure-firmware";
+ reg = <0x0203F000 0x1000>;
+ };
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index 5c1de47..b464333 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 dac146d..5f1d393 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 0000000..15d3c87
--- /dev/null
+++ b/arch/arm/mach-exynos/firmware.c
@@ -0,0 +1,67 @@
+/*
+ * 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/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_cpu_boot_reg(int cpu, void __iomem **ptr)
+{
+ *ptr = S5P_VA_SYSRAM_NS + 0x1c + 4*cpu;
+ return 0;
+}
+
+static const struct firmware_ops exynos_firmware_ops = {
+ .do_idle = exynos_do_idle,
+ .cpu_boot = exynos_cpu_boot,
+ .cpu_boot_reg = exynos_cpu_boot_reg,
+};
+
+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 eadf4b5..977bd39 100644
--- a/arch/arm/mach-exynos/mach-exynos4-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos4-dt.c
@@ -103,6 +103,7 @@ 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,
--
1.7.12
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH v3 5/6] ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412
2012-10-25 15:22 [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Tomasz Figa
` (3 preceding siblings ...)
2012-10-25 15:22 ` [PATCH v3 4/6] ARM: EXYNOS: Add support for Exynos secure firmware Tomasz Figa
@ 2012-10-25 15:22 ` Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 6/6] ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up Tomasz Figa
2012-11-12 7:39 ` [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Kukjin Kim
6 siblings, 0 replies; 17+ messages in thread
From: Tomasz Figa @ 2012-10-25 15:22 UTC (permalink / raw)
To: linux-arm-kernel
Exynos4412 uses different information register for each core. This patch
adjusts the bring-up code to take that into account.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
---
arch/arm/mach-exynos/platsmp.c | 30 ++++++++++++++++++++++++------
1 file changed, 24 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index f93d820..4ca8ff1 100644
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -36,8 +36,22 @@
extern void exynos4_secondary_startup(void);
-#define CPU1_BOOT_REG (samsung_rev() == EXYNOS4210_REV_1_1 ? \
- S5P_INFORM5 : S5P_VA_SYSRAM)
+static inline void __iomem *cpu_boot_reg_base(void)
+{
+ if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_1_1)
+ return S5P_INFORM5;
+ return S5P_VA_SYSRAM;
+}
+
+static inline void __iomem *cpu_boot_reg(int cpu)
+{
+ void __iomem *boot_reg;
+
+ boot_reg = cpu_boot_reg_base();
+ if (soc_is_exynos4412())
+ boot_reg += 4*cpu;
+ return boot_reg;
+}
/*
* Write pen_release in a way that is guaranteed to be visible to all
@@ -84,6 +98,7 @@ static void __cpuinit exynos_secondary_init(unsigned int cpu)
static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;
+ unsigned long phys_cpu = cpu_logical_map(cpu);
/*
* Set synchronisation state between this boot processor
@@ -99,7 +114,7 @@ static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct
* Note that "pen_release" is the hardware CPU ID, whereas
* "cpu" is Linux's internal ID.
*/
- write_pen_release(cpu_logical_map(cpu));
+ write_pen_release(phys_cpu);
if (!(__raw_readl(S5P_ARM_CORE1_STATUS) & S5P_CORE_LOCAL_PWR_EN)) {
__raw_writel(S5P_CORE_LOCAL_PWR_EN,
@@ -133,7 +148,7 @@ static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct
smp_rmb();
__raw_writel(virt_to_phys(exynos4_secondary_startup),
- CPU1_BOOT_REG);
+ cpu_boot_reg(phys_cpu));
gic_raise_softirq(cpumask_of(cpu), 0);
if (pen_release == -1)
@@ -181,6 +196,8 @@ static void __init exynos_smp_init_cpus(void)
static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
{
+ int i;
+
if (!soc_is_exynos5250())
scu_enable(scu_base_addr());
@@ -190,8 +207,9 @@ static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
* until it receives a soft interrupt, and then the
* secondary CPU branches to this address.
*/
- __raw_writel(virt_to_phys(exynos4_secondary_startup),
- CPU1_BOOT_REG);
+ for (i = 1; i < max_cpus; ++i)
+ __raw_writel(virt_to_phys(exynos4_secondary_startup),
+ cpu_boot_reg(cpu_logical_map(i)));
}
struct smp_operations exynos_smp_ops __initdata = {
--
1.7.12
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH v3 6/6] ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up
2012-10-25 15:22 [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Tomasz Figa
` (4 preceding siblings ...)
2012-10-25 15:22 ` [PATCH v3 5/6] ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412 Tomasz Figa
@ 2012-10-25 15:22 ` Tomasz Figa
2012-11-12 9:52 ` Russell King - ARM Linux
2012-11-12 7:39 ` [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Kukjin Kim
6 siblings, 1 reply; 17+ messages in thread
From: Tomasz Figa @ 2012-10-25 15:22 UTC (permalink / raw)
To: linux-arm-kernel
Boards using secure firmware must use different CPU boot registers and
call secure firmware to boot the CPU.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
---
arch/arm/mach-exynos/platsmp.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index 4ca8ff1..9f8bdaf 100644
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -25,6 +25,7 @@
#include <asm/hardware/gic.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
+#include <asm/firmware.h>
#include <mach/hardware.h>
#include <mach/regs-clock.h>
@@ -47,6 +48,8 @@ static inline void __iomem *cpu_boot_reg(int cpu)
{
void __iomem *boot_reg;
+ if (!call_firmware_op(cpu_boot_reg, cpu, &boot_reg))
+ return boot_reg;
boot_reg = cpu_boot_reg_base();
if (soc_is_exynos4412())
boot_reg += 4*cpu;
@@ -149,6 +152,10 @@ static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct
__raw_writel(virt_to_phys(exynos4_secondary_startup),
cpu_boot_reg(phys_cpu));
+
+ /* Call Exynos specific smc call */
+ call_firmware_op(cpu_boot, phys_cpu);
+
gic_raise_softirq(cpumask_of(cpu), 0);
if (pen_release == -1)
--
1.7.12
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support
2012-10-25 15:22 [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Tomasz Figa
` (5 preceding siblings ...)
2012-10-25 15:22 ` [PATCH v3 6/6] ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up Tomasz Figa
@ 2012-11-12 7:39 ` Kukjin Kim
2012-11-12 9:55 ` Russell King - ARM Linux
6 siblings, 1 reply; 17+ messages in thread
From: Kukjin Kim @ 2012-11-12 7:39 UTC (permalink / raw)
To: linux-arm-kernel
Tomasz Figa wrote:
>
> Some Exynos-based boards are running with secure firmware running in
> TrustZone secure world, which changes the way some things have to be
> initialized.
>
> This series adds support for specifying firmware operations, implements
> some firmware operations for Exynos secure firmware and adds a method of
> enabling secure firmware operations on Exynos-based boards through board
> file and device tree.
>
> Changes since v2
> ( http://thread.gmane.org/gmane.linux.kernel.samsung-soc/12848 )
> - Made Exynos firmware binding require address
> - Minor style fixes
>
> Changes since v1
> ( http://thread.gmane.org/gmane.linux.kernel.samsung-
> soc/12583/focus=12820 )
> - Changed return types of all operations to int
> - Defined all operations to return 0 on success, -ENOSYS when not
> implemented or appropriate error code on error
>
> Tomasz Figa (6):
> ARM: Add interface for registering and calling firmware-specific
> operations
> ARM: EXYNOS: Add support for secure monitor calls
> ARM: EXYNOS: Add IO mapping for non-secure SYSRAM.
> ARM: EXYNOS: Add support for Exynos secure firmware
> ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412
> ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up
>
> .../devicetree/bindings/arm/samsung-boards.txt | 10 ++++
> arch/arm/common/Makefile | 2 +
> arch/arm/common/firmware.c | 18 ++++++
> arch/arm/include/asm/firmware.h | 31 ++++++++++
> arch/arm/mach-exynos/Makefile | 6 ++
> arch/arm/mach-exynos/common.c | 35 +++++++++++
> arch/arm/mach-exynos/common.h | 2 +
> arch/arm/mach-exynos/exynos-smc.S | 22 +++++++
> arch/arm/mach-exynos/firmware.c | 67 ++++++++++++++++++++++
> arch/arm/mach-exynos/include/mach/map.h | 3 +
> arch/arm/mach-exynos/mach-exynos4-dt.c | 1 +
> arch/arm/mach-exynos/platsmp.c | 37 ++++++++++--
> arch/arm/mach-exynos/smc.h | 31 ++++++++++
> arch/arm/plat-samsung/include/plat/map-s5p.h | 1 +
> 14 files changed, 260 insertions(+), 6 deletions(-)
> create mode 100644 arch/arm/common/firmware.c
> create mode 100644 arch/arm/include/asm/firmware.h
> create mode 100644 arch/arm/mach-exynos/exynos-smc.S
> create mode 100644 arch/arm/mach-exynos/firmware.c
> create mode 100644 arch/arm/mach-exynos/smc.h
>
> --
> 1.7.12
(+ Russell King)
As we discussed, let me pick up this series into Samsung tree.
If any objections, please kindly let me know.
Thanks.
Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 4/6] ARM: EXYNOS: Add support for Exynos secure firmware
2012-10-25 15:22 ` [PATCH v3 4/6] ARM: EXYNOS: Add support for Exynos secure firmware Tomasz Figa
@ 2012-11-12 9:51 ` Russell King - ARM Linux
2012-11-12 10:09 ` Tomasz Figa
0 siblings, 1 reply; 17+ messages in thread
From: Russell King - ARM Linux @ 2012-11-12 9:51 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, Oct 25, 2012 at 05:22:38PM +0200, Tomasz Figa wrote:
> +static int exynos_do_idle(void)
> +{
> + exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
> + return 0;
> +}
This looks fine as an API - it has a defined purpose.
> +
> +static int exynos_cpu_boot(int cpu)
> +{
> + exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
> + return 0;
> +}
Same for this (though, what _exactly_ is 'cpu', is it the physical CPU
number or the logical CPU number?)
> +
> +static int exynos_cpu_boot_reg(int cpu, void __iomem **ptr)
> +{
> + *ptr = S5P_VA_SYSRAM_NS + 0x1c + 4*cpu;
> + return 0;
> +}
This is really bad. What's it trying to do? What is the significance
of the 'ptr' returned? What if a platform doesn't have a boot register?
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 6/6] ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up
2012-10-25 15:22 ` [PATCH v3 6/6] ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up Tomasz Figa
@ 2012-11-12 9:52 ` Russell King - ARM Linux
2012-11-12 10:11 ` Tomasz Figa
0 siblings, 1 reply; 17+ messages in thread
From: Russell King - ARM Linux @ 2012-11-12 9:52 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, Oct 25, 2012 at 05:22:40PM +0200, Tomasz Figa wrote:
> @@ -47,6 +48,8 @@ static inline void __iomem *cpu_boot_reg(int cpu)
> {
> void __iomem *boot_reg;
>
> + if (!call_firmware_op(cpu_boot_reg, cpu, &boot_reg))
> + return boot_reg;
> boot_reg = cpu_boot_reg_base();
That code makes no sense.
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support
2012-11-12 7:39 ` [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Kukjin Kim
@ 2012-11-12 9:55 ` Russell King - ARM Linux
2012-11-12 10:14 ` Tomasz Figa
0 siblings, 1 reply; 17+ messages in thread
From: Russell King - ARM Linux @ 2012-11-12 9:55 UTC (permalink / raw)
To: linux-arm-kernel
On Mon, Nov 12, 2012 at 04:39:28PM +0900, Kukjin Kim wrote:
> (+ Russell King)
I think there's still an amount of work to do here; it's not a generic
interface at the moment because it makes some assumptions about how
things are done (eg, it assumes that there _will_ be a CPU boot register;
that is not always true.
Moreover, the 'cpu' arguments given seem to be uncertain whether they're
logical CPU numbers or physical CPU numbers.
Lastly, where is this interface actually documented? It's just a bunch
of code _without_ _any_ documentation. That means people will interpret
it differently, and it'll get used differently from platform to platform.
Let's have some documentation on this.
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 4/6] ARM: EXYNOS: Add support for Exynos secure firmware
2012-11-12 9:51 ` Russell King - ARM Linux
@ 2012-11-12 10:09 ` Tomasz Figa
2012-12-26 8:30 ` Barry Song
0 siblings, 1 reply; 17+ messages in thread
From: Tomasz Figa @ 2012-11-12 10:09 UTC (permalink / raw)
To: linux-arm-kernel
Hi Russel,
On Monday 12 of November 2012 09:51:14 Russell King - ARM Linux wrote:
> > +
> > +static int exynos_cpu_boot(int cpu)
> > +{
> > + exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
> > + return 0;
> > +}
>
> Same for this (though, what _exactly_ is 'cpu', is it the physical CPU
> number or the logical CPU number?)
Yes, it's the physical CPU number.
> > +
> > +static int exynos_cpu_boot_reg(int cpu, void __iomem **ptr)
> > +{
> > + *ptr = S5P_VA_SYSRAM_NS + 0x1c + 4*cpu;
> > + return 0;
> > +}
>
> This is really bad. What's it trying to do? What is the significance
> of the 'ptr' returned? What if a platform doesn't have a boot register?
It returns a pointer to the area where boot code (secondary startup)
address must be stored.
This callback (just as all the firmware callbacks) is optional, if it is
not appropriate for given platform, it will not use it.
However, now when I think of it, it may be better to just add a callback
like set_boot_addr(cpu, addr), which would set boot address of given CPU
without exporting address of its boot register outside firmware code. Are
you OK with this kind of approach?
Best regards,
--
Tomasz Figa
Samsung Poland R&D Center
SW Solution Development, Linux Platform
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 6/6] ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up
2012-11-12 9:52 ` Russell King - ARM Linux
@ 2012-11-12 10:11 ` Tomasz Figa
0 siblings, 0 replies; 17+ messages in thread
From: Tomasz Figa @ 2012-11-12 10:11 UTC (permalink / raw)
To: linux-arm-kernel
On Monday 12 of November 2012 09:52:31 Russell King - ARM Linux wrote:
> On Thu, Oct 25, 2012 at 05:22:40PM +0200, Tomasz Figa wrote:
> > @@ -47,6 +48,8 @@ static inline void __iomem *cpu_boot_reg(int cpu)
> >
> > {
> >
> > void __iomem *boot_reg;
> >
> > + if (!call_firmware_op(cpu_boot_reg, cpu, &boot_reg))
> > + return boot_reg;
> >
> > boot_reg = cpu_boot_reg_base();
>
> That code makes no sense.
Why?
call_firmware_op returning 0 means a success, so boot_reg is filled with
proper boot register address, which should be used.
Otherwise (call_firmware_op returning an error) the legacy boot register
is used.
Best regards,
--
Tomasz Figa
Samsung Poland R&D Center
SW Solution Development, Linux Platform
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support
2012-11-12 9:55 ` Russell King - ARM Linux
@ 2012-11-12 10:14 ` Tomasz Figa
2012-11-22 6:52 ` Kukjin Kim
0 siblings, 1 reply; 17+ messages in thread
From: Tomasz Figa @ 2012-11-12 10:14 UTC (permalink / raw)
To: linux-arm-kernel
On Monday 12 of November 2012 09:55:30 Russell King - ARM Linux wrote:
> On Mon, Nov 12, 2012 at 04:39:28PM +0900, Kukjin Kim wrote:
> > (+ Russell King)
>
> I think there's still an amount of work to do here; it's not a generic
> interface at the moment because it makes some assumptions about how
> things are done (eg, it assumes that there _will_ be a CPU boot
> register; that is not always true.
>
> Moreover, the 'cpu' arguments given seem to be uncertain whether they're
> logical CPU numbers or physical CPU numbers.
>
> Lastly, where is this interface actually documented? It's just a bunch
> of code _without_ _any_ documentation. That means people will interpret
> it differently, and it'll get used differently from platform to
> platform.
>
> Let's have some documentation on this.
Right, I will include documentation in next version of this patchset.
Best regards,
--
Tomasz Figa
Samsung Poland R&D Center
SW Solution Development, Linux Platform
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support
2012-11-12 10:14 ` Tomasz Figa
@ 2012-11-22 6:52 ` Kukjin Kim
2012-11-22 9:33 ` Tomasz Figa
0 siblings, 1 reply; 17+ messages in thread
From: Kukjin Kim @ 2012-11-22 6:52 UTC (permalink / raw)
To: linux-arm-kernel
Tomasz Figa wrote:
>
> On Monday 12 of November 2012 09:55:30 Russell King - ARM Linux wrote:
> > On Mon, Nov 12, 2012 at 04:39:28PM +0900, Kukjin Kim wrote:
> > > (+ Russell King)
> >
> > I think there's still an amount of work to do here; it's not a generic
> > interface at the moment because it makes some assumptions about how
> > things are done (eg, it assumes that there _will_ be a CPU boot
> > register; that is not always true.
> >
> > Moreover, the 'cpu' arguments given seem to be uncertain whether they're
> > logical CPU numbers or physical CPU numbers.
> >
> > Lastly, where is this interface actually documented? It's just a bunch
> > of code _without_ _any_ documentation. That means people will interpret
> > it differently, and it'll get used differently from platform to
> > platform.
> >
> > Let's have some documentation on this.
>
> Right, I will include documentation in next version of this patchset.
>
Any updates on this?
Thanks.
Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support
2012-11-22 6:52 ` Kukjin Kim
@ 2012-11-22 9:33 ` Tomasz Figa
0 siblings, 0 replies; 17+ messages in thread
From: Tomasz Figa @ 2012-11-22 9:33 UTC (permalink / raw)
To: linux-arm-kernel
Hi Kgene,
On Thursday 22 of November 2012 15:52:14 Kukjin Kim wrote:
> Tomasz Figa wrote:
> > On Monday 12 of November 2012 09:55:30 Russell King - ARM Linux wrote:
> > > On Mon, Nov 12, 2012 at 04:39:28PM +0900, Kukjin Kim wrote:
> > > > (+ Russell King)
> > >
> > > I think there's still an amount of work to do here; it's not a
> > > generic
> > > interface at the moment because it makes some assumptions about how
> > > things are done (eg, it assumes that there _will_ be a CPU boot
> > > register; that is not always true.
> > >
> > > Moreover, the 'cpu' arguments given seem to be uncertain whether
> > > they're logical CPU numbers or physical CPU numbers.
> > >
> > > Lastly, where is this interface actually documented? It's just a
> > > bunch
> > > of code _without_ _any_ documentation. That means people will
> > > interpret it differently, and it'll get used differently from
> > > platform to platform.
> > >
> > > Let's have some documentation on this.
> >
> > Right, I will include documentation in next version of this patchset.
>
> Any updates on this?
>
> Thanks.
>
> Best regards,
> Kgene.
> --
> Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
> SW Solution Development Team, Samsung Electronics Co., Ltd.
I was waiting for some comments about my proposals, but since there is no
new input I will prepare and post next version today.
Best regards.
--
Tomasz Figa
Samsung Poland R&D Center
SW Solution Development, Linux Platform
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH v3 4/6] ARM: EXYNOS: Add support for Exynos secure firmware
2012-11-12 10:09 ` Tomasz Figa
@ 2012-12-26 8:30 ` Barry Song
0 siblings, 0 replies; 17+ messages in thread
From: Barry Song @ 2012-12-26 8:30 UTC (permalink / raw)
To: linux-arm-kernel
2012/11/12, Tomasz Figa <t.figa@samsung.com>:
> Hi Russel,
>
> On Monday 12 of November 2012 09:51:14 Russell King - ARM Linux wrote:
>> > +
>> > +static int exynos_cpu_boot(int cpu)
>> > +{
>> > + exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
>> > + return 0;
>> > +}
>>
>> Same for this (though, what _exactly_ is 'cpu', is it the physical CPU
>> number or the logical CPU number?)
>
> Yes, it's the physical CPU number.
>
>> > +
>> > +static int exynos_cpu_boot_reg(int cpu, void __iomem **ptr)
>> > +{
>> > + *ptr = S5P_VA_SYSRAM_NS + 0x1c + 4*cpu;
>> > + return 0;
>> > +}
>>
>> This is really bad. What's it trying to do? What is the significance
>> of the 'ptr' returned? What if a platform doesn't have a boot register?
>
> It returns a pointer to the area where boot code (secondary startup)
> address must be stored.
>
> This callback (just as all the firmware callbacks) is optional, if it is
> not appropriate for given platform, it will not use it.
>
> However, now when I think of it, it may be better to just add a callback
> like set_boot_addr(cpu, addr), which would set boot address of given CPU
> without exporting address of its boot register outside firmware code. Are
> you OK with this kind of approach?
it seems the firmware_ops you are providing is just for samsung EXYNOS
SMC, esepecially for the boot of secondary physical cpu. then it
really should be namespaced.
more callbacks for a common secure monitor APIs might need to cover
1. boot of 2nd CPU
2. do_idle(might let the other RTOS running on secure mode to be schedued in)
3. call SMC, send param and get feedback from firmware
4. might need to handle the steal time of firmware, firmware is also
taking the CPU time, but linux doesn't know. it will affect the
scheduler of Linux.
>
>
> Best regards,
> --
> Tomasz Figa
> Samsung Poland R&D Center
> SW Solution Development, Linux Platform
-barry
^ permalink raw reply [flat|nested] 17+ messages in thread
end of thread, other threads:[~2012-12-26 8:30 UTC | newest]
Thread overview: 17+ messages (download: mbox.gz follow: Atom feed
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2012-10-25 15:22 [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 1/6] ARM: Add interface for registering and calling firmware-specific operations Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 2/6] ARM: EXYNOS: Add support for secure monitor calls Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 3/6] ARM: EXYNOS: Add IO mapping for non-secure SYSRAM Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 4/6] ARM: EXYNOS: Add support for Exynos secure firmware Tomasz Figa
2012-11-12 9:51 ` Russell King - ARM Linux
2012-11-12 10:09 ` Tomasz Figa
2012-12-26 8:30 ` Barry Song
2012-10-25 15:22 ` [PATCH v3 5/6] ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412 Tomasz Figa
2012-10-25 15:22 ` [PATCH v3 6/6] ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up Tomasz Figa
2012-11-12 9:52 ` Russell King - ARM Linux
2012-11-12 10:11 ` Tomasz Figa
2012-11-12 7:39 ` [PATCH v3 0/6] ARM: EXYNOS: Add secure firmware support Kukjin Kim
2012-11-12 9:55 ` Russell King - ARM Linux
2012-11-12 10:14 ` Tomasz Figa
2012-11-22 6:52 ` Kukjin Kim
2012-11-22 9:33 ` Tomasz Figa
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