The cpu_is_[name]() can be used to distinguish cpu at runtime.
This patch was originally from Changhwan Youn <chaos.youn@xxxxxxxxxxx>
Acked-by: Changhwan Youn <chaos.youn@xxxxxxxxxxx>
Cc: Ben Dooks <ben-linux@xxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
arch/arm/mach-s3c64xx/cpu.c | 18 +++----
arch/arm/plat-s3c24xx/cpu.c | 8 +--
arch/arm/plat-s5p/cpu.c | 26 ++++-----
arch/arm/plat-samsung/include/plat/cpu.h | 87 +++++++++++++++++++++++++++++-
arch/arm/plat-samsung/init.c | 1 +
5 files changed, 110 insertions(+), 30 deletions(-)
diff --git a/arch/arm/mach-s3c64xx/cpu.c b/arch/arm/mach-s3c64xx/cpu.c
index 374e45e..7b665f3 100644
--- a/arch/arm/mach-s3c64xx/cpu.c
+++ b/arch/arm/mach-s3c64xx/cpu.c
@@ -43,16 +43,16 @@ static const char name_s3c6410[] = "S3C6410";
static struct cpu_table cpu_ids[] __initdata = {
{
- .idcode = 0x36400000,
- .idmask = 0xfffff000,
+ .idcode = S3C6400_CPU_ID,
+ .idmask = S3C64XX_CPU_MASK,
.map_io = s3c6400_map_io,
.init_clocks = s3c6400_init_clocks,
.init_uarts = s3c6400_init_uarts,
.init = s3c6400_init,
.name = name_s3c6400,
}, {
- .idcode = 0x36410100,
- .idmask = 0xffffff00,
+ .idcode = S3C6410_CPU_ID,
+ .idmask = S3C64XX_CPU_MASK,
.map_io = s3c6410_map_io,
.init_clocks = s3c6410_init_clocks,
.init_uarts = s3c6410_init_uarts,
@@ -140,22 +140,20 @@ void __init s3c6400_common_init_uarts(struct s3c2410_uartcfg *cfg, int no)
void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
{
- unsigned long idcode;
-
/* initialise the io descriptors we need for initialisation */
iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
iotable_init(mach_desc, size);
- idcode = __raw_readl(S3C_VA_SYS + 0x118);
- if (!idcode) {
+ samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0x118);
+ if (!samsung_cpu_id) {
/* S3C6400 has the ID register in a different place,
* and needs a write before it can be read. */
__raw_writel(0x0, S3C_VA_SYS + 0xA1C);
- idcode = __raw_readl(S3C_VA_SYS + 0xA1C);
+ samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0xA1C);
}
- s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
+ s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
}
static __init int s3c64xx_sysdev_init(void)
diff --git a/arch/arm/plat-s3c24xx/cpu.c b/arch/arm/plat-s3c24xx/cpu.c
index c1fc6c6..ead21a4 100644
--- a/arch/arm/plat-s3c24xx/cpu.c
+++ b/arch/arm/plat-s3c24xx/cpu.c
@@ -215,19 +215,17 @@ static void s3c24xx_pm_restart(char mode, const char *cmd)
void __init s3c24xx_init_io(struct map_desc *mach_desc, int size)
{
- unsigned long idcode = 0x0;
-
/* initialise the io descriptors we need for initialisation */
iotable_init(mach_desc, size);
iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
if (cpu_architecture() >= CPU_ARCH_ARMv5) {
- idcode = s3c24xx_read_idcode_v5();
+ samsung_cpu_id = s3c24xx_read_idcode_v5();
} else {
- idcode = s3c24xx_read_idcode_v4();
+ samsung_cpu_id = s3c24xx_read_idcode_v4();
}
arm_pm_restart = s3c24xx_pm_restart;
- s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
+ s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
}
diff --git a/arch/arm/plat-s5p/cpu.c b/arch/arm/plat-s5p/cpu.c
index bbc2aa7..3ef6734 100644
--- a/arch/arm/plat-s5p/cpu.c
+++ b/arch/arm/plat-s5p/cpu.c
@@ -36,40 +36,40 @@ static const char name_exynos4210[] = "EXYNOS4210";
static struct cpu_table cpu_ids[] __initdata = {
{
- .idcode = 0x56440100,
- .idmask = 0xfffff000,
+ .idcode = S5P6440_CPU_ID,
+ .idmask = S5P64XX_CPU_MASK,
.map_io = s5p6440_map_io,
.init_clocks = s5p6440_init_clocks,
.init_uarts = s5p6440_init_uarts,
.init = s5p64x0_init,
.name = name_s5p6440,
}, {
- .idcode = 0x36450000,
- .idmask = 0xfffff000,
+ .idcode = S5P6450_CPU_ID,
+ .idmask = S5P64XX_CPU_MASK,
.map_io = s5p6450_map_io,
.init_clocks = s5p6450_init_clocks,
.init_uarts = s5p6450_init_uarts,
.init = s5p64x0_init,
.name = name_s5p6450,
}, {
- .idcode = 0x43100000,
- .idmask = 0xfffff000,
+ .idcode = S5PC100_CPU_ID,
+ .idmask = S5PC100_CPU_MASK,
.map_io = s5pc100_map_io,
.init_clocks = s5pc100_init_clocks,
.init_uarts = s5pc100_init_uarts,
.init = s5pc100_init,
.name = name_s5pc100,
}, {
- .idcode = 0x43110000,
- .idmask = 0xfffff000,
+ .idcode = S5PV210_CPU_ID,
+ .idmask = S5PV210_CPU_MASK,
.map_io = s5pv210_map_io,
.init_clocks = s5pv210_init_clocks,
.init_uarts = s5pv210_init_uarts,
.init = s5pv210_init,
.name = name_s5pv210,
}, {
- .idcode = 0x43210000,
- .idmask = 0xfffe0000,
+ .idcode = EXYNOS4210_CPU_ID,
+ .idmask = EXYNOS4_CPU_MASK,
.map_io = exynos4_map_io,
.init_clocks = exynos4_init_clocks,
.init_uarts = exynos4_init_uarts,
@@ -114,13 +114,11 @@ static struct map_desc s5p_iodesc[] __initdata = {
void __init s5p_init_io(struct map_desc *mach_desc,
int size, void __iomem *cpuid_addr)
{
- unsigned long idcode;
-
/* initialize the io descriptors we need for initialization */
iotable_init(s5p_iodesc, ARRAY_SIZE(s5p_iodesc));
if (mach_desc)
iotable_init(mach_desc, size);
- idcode = __raw_readl(cpuid_addr);
- s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
+ samsung_cpu_id = __raw_readl(cpuid_addr);
+ s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
}
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index c0a5741..b762b37 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -1,9 +1,12 @@
/* linux/arch/arm/plat-samsung/include/plat/cpu.h
*
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
* Copyright (c) 2004-2005 Simtec Electronics
* Ben Dooks <ben@xxxxxxxxxxxx>
*
- * Header file for S3C24XX CPU support
+ * Header file for Samsung CPU support
*
* 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
@@ -15,6 +18,88 @@
#ifndef __SAMSUNG_PLAT_CPU_H
#define __SAMSUNG_PLAT_CPU_H
+extern unsigned long samsung_cpu_id;
+
+#define S3C24XX_CPU_ID 0x32400000
+#define S3C24XX_CPU_MASK 0xFFF00000
+
+#define S3C6400_CPU_ID 0x36400000
+#define S3C6410_CPU_ID 0x36410000
+#define S3C64XX_CPU_ID (S3C6400_CPU_ID & S3C6410_CPU_ID)
+#define S3C64XX_CPU_MASK 0x1FF40000
+
+#define S5P6440_CPU_ID 0x56440000
+#define S5P6450_CPU_ID 0x36450000
+#define S5P64XX_CPU_MASK 0x1FF40000
+
+#define S5PC100_CPU_ID 0x43100000
+#define S5PC100_CPU_MASK 0xFFFFF000
+
+#define S5PV210_CPU_ID 0x43110000
+#define S5PV210_CPU_MASK 0xFFFFF000
+
+#define EXYNOS4210_CPU_ID 0x43210000
+#define EXYNOS4_CPU_MASK 0xFFFE0000
+
+#define IS_SAMSUNG_CPU(name, id, mask) \
+static inline int is_samsung_##name(void) \
+{ \
+ return ((samsung_cpu_id & mask) == (id & mask)); \
+}
+
+IS_SAMSUNG_CPU(s3c24xx, S3C24XX_CPU_ID, S3C24XX_CPU_MASK)
+IS_SAMSUNG_CPU(s3c64xx, S3C64XX_CPU_ID, S3C64XX_CPU_MASK)
+IS_SAMSUNG_CPU(s5p6440, S5P6440_CPU_ID, S5P64XX_CPU_MASK)
+IS_SAMSUNG_CPU(s5p6450, S5P6450_CPU_ID, S5P64XX_CPU_MASK)
+IS_SAMSUNG_CPU(s5pc100, S5PC100_CPU_ID, S5PC100_CPU_MASK)
+IS_SAMSUNG_CPU(s5pv210, S5PV210_CPU_ID, S5PV210_CPU_MASK)
+IS_SAMSUNG_CPU(exynos4210, EXYNOS4210_CPU_ID, EXYNOS4_CPU_MASK)
+
+#if defined(CONFIG_CPU_S3C2410) || defined(CONFIG_CPU_S3C2412) || \
+ defined(CONFIG_CPU_S3C2416) || defined(CONFIG_CPU_S3C2440) || \
+ defined(CONFIG_CPU_S3C2442) || defined(CONFIG_CPU_S3C244X) || \
+ defined(CONFIG_CPU_S3C2443)
+# define cpu_is_s3c24xx() is_samsung_s3c24xx()
+#else
+# define cpu_is_s3c24xx() 0
+#endif
+
+#if defined(CONFIG_CPU_S3C6400) || defined(CONFIG_CPU_S3C6410)
+# define cpu_is_s3c64xx() is_samsung_s3c64xx()
+#else
+# define cpu_is_s3c64xx() 0
+#endif
+
+#if defined(CONFIG_CPU_S5P6440)
+# define cpu_is_s5p6440() is_samsung_s5p6440()
+#else
+# define cpu_is_s5p6440() 0
+#endif
+
+#if defined(CONFIG_CPU_S5P6450)
+# define cpu_is_s5p6450() is_samsung_s5p6450()
+#else
+# define cpu_is_s5p6450() 0
+#endif
+
+#if defined(CONFIG_CPU_S5PC100)
+# define cpu_is_s5pc100() is_samsung_s5pc100()
+#else
+# define cpu_is_s5pc100() 0
+#endif
+
+#if defined(CONFIG_CPU_S5PV210)
+# define cpu_is_s5pv210() is_samsung_s5pv210()
+#else
+# define cpu_is_s5pv210() 0
+#endif
+
+#if defined(CONFIG_CPU_EXYNOS4210)
+# define cpu_is_exynos4210() is_samsung_exynos4210()
+#else
+# define cpu_is_exynos4210() 0
+#endif
+
#define IODESC_ENT(x) { (unsigned long)S3C24XX_VA_##x, __phys_to_pfn(S3C24XX_PA_##x), S3C24XX_SZ_##x, MT_DEVICE }
#ifndef MHZ
diff --git a/arch/arm/plat-samsung/init.c b/arch/arm/plat-samsung/init.c
index 79d10fc..40b1228 100644
--- a/arch/arm/plat-samsung/init.c
+++ b/arch/arm/plat-samsung/init.c
@@ -30,6 +30,7 @@
#include <plat/regs-serial.h>
static struct cpu_table *cpu;
+unsigned long samsung_cpu_id;
static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode,
struct cpu_table *tab,
--
1.7.1
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