To remove dependency on soc_is_exynosMMMM macros and remove
multiple checks for such macros lets refactor code in platsmp.c.
This patch introduces new structure as exynos_cpu_info to
separate such variable information and routines which vary from
one Exynos SoC to other SoC. During smp_prepare_cpus lets match
SoC specific information to select appropriate exynos_cpu_info
and use it in all other places
Signed-off-by: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx>
---
arch/arm/mach-exynos/platsmp.c | 244 +++++++++++++++++++++++++++++++++++------
1 file changed, 210 insertions(+), 34 deletions(-)
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index 4de254e..759a184 100644
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -19,6 +19,7 @@
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/of_address.h>
+#include <linux/sys_soc.h>
#include <linux/soc/samsung/exynos-regs-pmu.h>
#include <asm/cacheflush.h>
@@ -27,12 +28,26 @@
#include <asm/smp_scu.h>
#include <asm/firmware.h>
-#include <mach/map.h>
-
#include "common.h"
extern void exynos4_secondary_startup(void);
+/*
+ * struct exynos_cpu_info - Exynos CPU related info/operations
+ * @cpu_boot_reg: computes cpu boot address for requested cpu
+ * @cpu_power_down: handles cpu power down routine for requested cpu
+ * @cpu_power_up: handles cpu power up routine for requested cpu
+ * @cpu_restart: handles cpu restart routine for requested cpu
+ */
+struct exynos_cpu_info {
+ void __iomem* (*cpu_boot_reg)(u32 cpu);
+ void (*cpu_power_down)(u32 cpu);
+ void (*cpu_power_up)(u32 cpu);
+ void (*cpu_restart)(u32 cpu);
+};
+
+static const struct exynos_cpu_info *cpu_info;
+
#ifdef CONFIG_HOTPLUG_CPU
static inline void cpu_leave_lowpower(u32 core_id)
{
@@ -81,19 +96,39 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
}
#endif /* CONFIG_HOTPLUG_CPU */
-/**
- * exynos_core_power_down : power down the specified cpu
+/*
+ * exynos_cpu_power_down - power down the specified cpu
* @cpu : the cpu to power down
*
- * Power down the specified cpu. The sequence must be finished by a
- * call to cpu_do_idle()
- *
+ * The sequence must be finished by a call to cpu_do_idle()
*/
void exynos_cpu_power_down(int cpu)
{
+ if (cpu_info && cpu_info->cpu_power_down)
+ cpu_info->cpu_power_down(cpu);
+}
+
+/*
+ * exynos_common_cpu_power_down - common cpu power down routine for Exynos SoC
+ * @cpu : the cpu to power down
+ */
+static void exynos_common_cpu_power_down(u32 cpu)
+{
u32 core_conf;
- if (cpu == 0 && (soc_is_exynos5420() || soc_is_exynos5800())) {
+ core_conf = pmu_raw_readl(EXYNOS_ARM_CORE_CONFIGURATION(cpu));
+ core_conf &= ~S5P_CORE_LOCAL_PWR_EN;
+ pmu_raw_writel(core_conf, EXYNOS_ARM_CORE_CONFIGURATION(cpu));
+}
+
+/*
+ * exynos5420_cpu_power_down - Exynos5420/Exynos5800 specific cpu power down
+ * routine
+ * @cpu : the cpu to power down
+ */
+static void exynos5420_cpu_power_down(u32 cpu)
+{
+ if (cpu == 0) {
/*
* Bypass power down for CPU0 during suspend. Check for
* the SYS_PWR_REG value to decide if we are suspending
@@ -105,24 +140,39 @@ void exynos_cpu_power_down(int cpu)
return;
}
- core_conf = pmu_raw_readl(EXYNOS_ARM_CORE_CONFIGURATION(cpu));
- core_conf &= ~S5P_CORE_LOCAL_PWR_EN;
- pmu_raw_writel(core_conf, EXYNOS_ARM_CORE_CONFIGURATION(cpu));
+ exynos_common_cpu_power_down(cpu);
}
/**
* exynos_cpu_power_up : power up the specified cpu
* @cpu : the cpu to power up
- *
- * Power up the specified cpu
*/
void exynos_cpu_power_up(int cpu)
{
+ if (cpu_info && cpu_info->cpu_power_up)
+ cpu_info->cpu_power_up(cpu);
+}
+
+/*
+ * exynos_common_cpu_power_up - common cpu power up routine for Exynos SoC
+ * @cpu : the cpu to power up
+ */
+static void exynos_common_cpu_power_up(u32 cpu)
+{
u32 core_conf = S5P_CORE_LOCAL_PWR_EN;
+ pmu_raw_writel(core_conf,
+ EXYNOS_ARM_CORE_CONFIGURATION(cpu));
+}
- if (soc_is_exynos3250())
- core_conf |= S5P_CORE_AUTOWAKEUP_EN;
+/*
+ * exynos3250_cpu_power_up - Exynos3250 specific cpu power up routine
+ * @cpu : the cpu to power down
+ */
+static void exynos3250_cpu_power_up(u32 cpu)
+{
+ u32 core_conf = S5P_CORE_LOCAL_PWR_EN;
+ core_conf |= S5P_CORE_AUTOWAKEUP_EN;
pmu_raw_writel(core_conf,
EXYNOS_ARM_CORE_CONFIGURATION(cpu));
}
@@ -130,7 +180,6 @@ void exynos_cpu_power_up(int cpu)
/**
* exynos_cpu_power_state : returns the power state of the cpu
* @cpu : the cpu to retrieve the power state from
- *
*/
int exynos_cpu_power_state(int cpu)
{
@@ -189,39 +238,76 @@ int exynos_scu_enable(void)
return 0;
}
-static void __iomem *cpu_boot_reg_base(void)
+static inline void __iomem *exynos_cpu_boot_reg(int cpu)
+{
+ if (cpu_info && cpu_info->cpu_boot_reg)
+ return cpu_info->cpu_boot_reg(cpu);
+ return NULL;
+}
+
+static void __iomem *exynos_common_cpu_boot_reg(u32 cpu)
{
- if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_1_1)
- return pmu_base_addr + S5P_INFORM5;
+ if (!sysram_base_addr)
+ return IOMEM_ERR_PTR(-ENODEV);
+
return sysram_base_addr;
}
-static inline void __iomem *cpu_boot_reg(int cpu)
+static void __iomem *exynos4210_cpu_boot_reg(u32 cpu)
{
void __iomem *boot_reg;
- boot_reg = cpu_boot_reg_base();
- if (!boot_reg)
+ if (!pmu_base_addr)
return IOMEM_ERR_PTR(-ENODEV);
- if (soc_is_exynos4412())
- boot_reg += 4*cpu;
- else if (soc_is_exynos5420() || soc_is_exynos5800())
- boot_reg += 4;
+ boot_reg = pmu_base_addr + S5P_INFORM5;
+
+ return boot_reg;
+}
+
+static void __iomem *exynos4412_cpu_boot_reg(u32 cpu)
+{
+ void __iomem *boot_reg;
+
+ if (!sysram_base_addr)
+ return IOMEM_ERR_PTR(-ENODEV);
+
+ boot_reg = sysram_base_addr;
+ boot_reg += 4*cpu;
+
+ return boot_reg;
+}
+
+static void __iomem *exynos5420_cpu_boot_reg(u32 cpu)
+{
+ void __iomem *boot_reg;
+
+ if (!sysram_base_addr)
+ return IOMEM_ERR_PTR(-ENODEV);
+
+ boot_reg = sysram_base_addr;
+ boot_reg += 4;
+
return boot_reg;
}
+/**
+ * exynos_core_restart : restart the specified cpu
+ * @core_id : the cpu to be restarted
+ */
+void exynos_core_restart(u32 core_id)
+{
+ if (cpu_info && cpu_info->cpu_restart)
+ cpu_info->cpu_restart(core_id);
+}
+
/*
* Set wake up by local power mode and execute software reset for given core.
- *
* Currently this is needed only when booting secondary CPU on Exynos3250.
*/
-void exynos_core_restart(u32 core_id)
+static void exynos3250_core_restart(u32 core_id)
{
u32 val;
- if (!of_machine_is_compatible("samsung,exynos3250"))
- return;
-
while (!pmu_raw_readl(S5P_PMU_SPARE2))
udelay(10);
udelay(10);
@@ -274,7 +360,7 @@ int exynos_set_boot_addr(u32 core_id, unsigned long boot_addr)
if (ret && ret != -ENOSYS)
goto fail;
if (ret == -ENOSYS) {
- void __iomem *boot_reg = cpu_boot_reg(core_id);
+ void __iomem *boot_reg = exynos_cpu_boot_reg(core_id);
if (IS_ERR(boot_reg)) {
ret = PTR_ERR(boot_reg);
@@ -299,7 +385,7 @@ int exynos_get_boot_addr(u32 core_id, unsigned long *boot_addr)
if (ret && ret != -ENOSYS)
goto fail;
if (ret == -ENOSYS) {
- void __iomem *boot_reg = cpu_boot_reg(core_id);
+ void __iomem *boot_reg = exynos_cpu_boot_reg(core_id);
if (IS_ERR(boot_reg)) {
ret = PTR_ERR(boot_reg);
@@ -312,13 +398,93 @@ int exynos_get_boot_addr(u32 core_id, unsigned long *boot_addr)
return ret;
}
+static const struct exynos_cpu_info exynos3250_cpu_info = {
+ .cpu_boot_reg = exynos_common_cpu_boot_reg,
+ .cpu_power_down = exynos_common_cpu_power_down,
+ .cpu_power_up = exynos3250_cpu_power_up,
+ .cpu_restart = exynos3250_core_restart,
+};
+
+static const struct exynos_cpu_info exynos5420_cpu_info = {
+ .cpu_boot_reg = exynos5420_cpu_boot_reg,
+ .cpu_power_down = exynos5420_cpu_power_down,
+ .cpu_power_up = exynos_common_cpu_power_up,
+};
+
+static const struct exynos_cpu_info exynos4210_cpu_info = {
+ .cpu_boot_reg = exynos4210_cpu_boot_reg,
+ .cpu_power_down = exynos_common_cpu_power_down,
+ .cpu_power_up = exynos_common_cpu_power_up,
+};
+
+static const struct exynos_cpu_info exynos4412_cpu_info = {
+ .cpu_boot_reg = exynos4412_cpu_boot_reg,
+ .cpu_power_down = exynos_common_cpu_power_down,
+ .cpu_power_up = exynos_common_cpu_power_up,
+};
+
+static const struct exynos_cpu_info exynos_common_cpu_info = {
+ .cpu_boot_reg = exynos_common_cpu_boot_reg,
+ .cpu_power_down = exynos_common_cpu_power_down,
+ .cpu_power_up = exynos_common_cpu_power_up,
+};
+
+static const struct soc_device_attribute exynos_soc_revision[] __initconst = {
+ {
+ .soc_id = "EXYNOS4210", .revision = "11",
+ .data = &exynos4210_cpu_info
+ }, {
+ .soc_id = "EXYNOS4210", .revision = "10",
+ .data = &exynos_common_cpu_info
+ }
+};
+
+static const struct of_device_id exynos_pmu_of_device_ids[] __initconst = {
+ {
+ .compatible = "samsung,exynos3250",
+ .data = &exynos3250_cpu_info
+ }, {
+ .compatible = "samsung,exynos4212",
+ .data = &exynos_common_cpu_info
+ }, {
+ .compatible = "samsung,exynos4412",
+ .data = &exynos4412_cpu_info
+ }, {
+ .compatible = "samsung,exynos5250",
+ .data = &exynos_common_cpu_info
+ }, {
+ .compatible = "samsung,exynos5260",
+ .data = &exynos_common_cpu_info
+ }, {
+ .compatible = "samsung,exynos5410",
+ .data = &exynos_common_cpu_info
+ }, {
+ .compatible = "samsung,exynos5420",
+ .data = &exynos5420_cpu_info
+ }, {
+ .compatible = "samsung,exynos5440",
+ .data = &exynos_common_cpu_info
+ }, {
+ .compatible = "samsung,exynos5800",
+ .data = &exynos5420_cpu_info
+ },
+ { /*sentinel*/ },
+};
+
static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;
+ const struct soc_device_attribute *match;
u32 mpidr = cpu_logical_map(cpu);
u32 core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
int ret = -ENOSYS;
+ if (of_machine_is_compatible("samsung,exynos4210")) {
+ match = soc_device_match(exynos_soc_revision);
+ if (match)
+ cpu_info = (const struct exynos_cpu_info *) match->data;
+ }
+
/*
* Set synchronisation state between this boot processor
* and the secondary one
@@ -377,7 +543,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
call_firmware_op(cpu_boot, core_id);
- if (soc_is_exynos3250())
+ if (of_machine_is_compatible("samsung,exynos3250"))
dsb_sev();
else
arch_send_wakeup_ipi_mask(cpumask_of(cpu));
@@ -403,6 +569,16 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
{
+ const struct of_device_id *match;
+ struct device_node *np;
+
+ np = of_find_matching_node_and_match(NULL,
+ exynos_pmu_of_device_ids, &match);
+ if (!np)
+ pr_err("failed to find supported CPU\n");
+ else
+ cpu_info = (const struct exynos_cpu_info *) match->data;
+
exynos_sysram_init();
exynos_set_delayed_reset_assertion(true);
--
2.7.4
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