ARM: SoC: convert shmobile SMP to SMP operations

Convert shmobile SMP platforms to use struct smp_operations to provide
their SMP and CPU hotplug operations.

Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-shmobile/board-ag5evm.c

@@ -650,6 +650,7 @@ static void __init ag5evm_init(void)
 }
 
 MACHINE_START(AG5EVM, "ag5evm")
+	.smp		= smp_ops(sh73a0_smp_ops),
 	.map_io		= sh73a0_map_io,
 	.init_early	= sh73a0_add_early_devices,
 	.nr_irqs	= NR_IRQS_LEGACY,

arch/arm/mach-shmobile/board-kota2.c

@@ -545,6 +545,7 @@ static void __init kota2_init(void)
 }
 
 MACHINE_START(KOTA2, "kota2")
+	.smp		= smp_ops(sh73a0_smp_ops),
 	.map_io		= sh73a0_map_io,
 	.init_early	= sh73a0_add_early_devices,
 	.nr_irqs	= NR_IRQS_LEGACY,

arch/arm/mach-shmobile/board-kzm9d.c

@@ -84,6 +84,7 @@ static const char *kzm9d_boards_compat_dt[] __initdata = {
 };
 
 DT_MACHINE_START(KZM9D_DT, "kzm9d")
+	.smp		= smp_ops(emev2_smp_ops),
 	.map_io		= emev2_map_io,
 	.init_early	= emev2_add_early_devices,
 	.nr_irqs	= NR_IRQS_LEGACY,

arch/arm/mach-shmobile/board-kzm9g.c

@@ -769,6 +769,7 @@ static const char *kzm9g_boards_compat_dt[] __initdata = {
 };
 
 DT_MACHINE_START(KZM9G_DT, "kzm9g")
+	.smp		= smp_ops(sh73a0_smp_ops),
 	.map_io		= sh73a0_map_io,
 	.init_early	= sh73a0_add_early_devices,
 	.nr_irqs	= NR_IRQS_LEGACY,

arch/arm/mach-shmobile/board-marzen.c

@@ -102,6 +102,7 @@ static void __init marzen_init(void)
 }
 
 MACHINE_START(MARZEN, "marzen")
+	.smp		= smp_ops(r8a7779_smp_ops),
 	.map_io		= r8a7779_map_io,
 	.init_early	= r8a7779_add_early_devices,
 	.nr_irqs	= NR_IRQS_LEGACY,

arch/arm/mach-shmobile/hotplug.c

@@ -14,30 +14,16 @@
 #include <linux/smp.h>
 #include <linux/cpumask.h>
 #include <linux/delay.h>
+#include <linux/of.h>
 #include <mach/common.h>
+#include <mach/r8a7779.h>
+#include <mach/emev2.h>
 #include <asm/cacheflush.h>
+#include <asm/mach-types.h>
 
 static cpumask_t dead_cpus;
 
-int platform_cpu_kill(unsigned int cpu)
-{
-	int k;
-
-	/* this function is running on another CPU than the offline target,
-	 * here we need wait for shutdown code in platform_cpu_die() to
-	 * finish before asking SoC-specific code to power off the CPU core.
-	 */
-	for (k = 0; k < 1000; k++) {
-		if (cpumask_test_cpu(cpu, &dead_cpus))
-			return shmobile_platform_cpu_kill(cpu);
-
-		mdelay(1);
-	}
-
-	return 0;
-}
-
-void platform_cpu_die(unsigned int cpu)
+void shmobile_cpu_die(unsigned int cpu)
 {
 	/* hardware shutdown code running on the CPU that is being offlined */
 	flush_cache_all();
@@ -60,7 +46,7 @@ void platform_cpu_die(unsigned int cpu)
 	}
 }
 
-int platform_cpu_disable(unsigned int cpu)
+int shmobile_cpu_disable(unsigned int cpu)
 {
 	cpumask_clear_cpu(cpu, &dead_cpus);
 	/*
@@ -69,3 +55,8 @@ int platform_cpu_disable(unsigned int cpu)
 	 */
 	return cpu == 0 ? -EPERM : 0;
 }
+
+int shmobile_cpu_is_dead(unsigned int cpu)
+{
+	return cpumask_test_cpu(cpu, &dead_cpus);
+}

arch/arm/mach-shmobile/include/mach/common.h

@@ -4,11 +4,10 @@
 extern void shmobile_earlytimer_init(void);
 extern struct sys_timer shmobile_timer;
 extern void shmobile_setup_delay(unsigned int max_cpu_core_mhz,
-				 unsigned int mult, unsigned int div);
+			 unsigned int mult, unsigned int div);
 struct twd_local_timer;
 extern void shmobile_setup_console(void);
 extern void shmobile_secondary_vector(void);
-extern int shmobile_platform_cpu_kill(unsigned int cpu);
 struct clk;
 extern int shmobile_clk_init(void);
 extern void shmobile_handle_irq_intc(struct pt_regs *);
@@ -58,11 +57,6 @@ extern struct clk sh73a0_extal2_clk;
 extern struct clk sh73a0_extcki_clk;
 extern struct clk sh73a0_extalr_clk;
 
-extern unsigned int sh73a0_get_core_count(void);
-extern void sh73a0_secondary_init(unsigned int cpu);
-extern int sh73a0_boot_secondary(unsigned int cpu);
-extern void sh73a0_smp_prepare_cpus(void);
-
 extern void r8a7740_init_irq(void);
 extern void r8a7740_map_io(void);
 extern void r8a7740_add_early_devices(void);
@@ -79,11 +73,6 @@ extern void r8a7779_pinmux_init(void);
 extern void r8a7779_pm_init(void);
 extern void r8a7740_meram_workaround(void);
 
-extern unsigned int r8a7779_get_core_count(void);
-extern int r8a7779_platform_cpu_kill(unsigned int cpu);
-extern void r8a7779_secondary_init(unsigned int cpu);
-extern int r8a7779_boot_secondary(unsigned int cpu);
-extern void r8a7779_smp_prepare_cpus(void);
 extern void r8a7779_register_twd(void);
 
 extern void shmobile_init_late(void);
@@ -100,4 +89,15 @@ int shmobile_cpuidle_init(void);
 static inline int shmobile_cpuidle_init(void) { return 0; }
 #endif
 
+extern void shmobile_cpu_die(unsigned int cpu);
+extern int shmobile_cpu_disable(unsigned int cpu);
+
+#ifdef CONFIG_HOTPLUG_CPU
+extern int shmobile_cpu_is_dead(unsigned int cpu);
+#else
+static inline int shmobile_cpu_is_dead(unsigned int cpu) { return 1; }
+#endif
+
+extern void shmobile_smp_init_cpus(unsigned int ncores);
+
 #endif /* __ARCH_MACH_COMMON_H */

arch/arm/mach-shmobile/include/mach/emev2.h

@@ -7,13 +7,10 @@ extern void emev2_add_early_devices(void);
 extern void emev2_add_standard_devices(void);
 extern void emev2_clock_init(void);
 extern void emev2_set_boot_vector(unsigned long value);
-extern unsigned int emev2_get_core_count(void);
-extern int emev2_platform_cpu_kill(unsigned int cpu);
-extern void emev2_secondary_init(unsigned int cpu);
-extern int emev2_boot_secondary(unsigned int cpu);
-extern void emev2_smp_prepare_cpus(void);
 
 #define EMEV2_GPIO_BASE 200
 #define EMEV2_GPIO_IRQ(n) (EMEV2_GPIO_BASE + (n))
 
+extern struct smp_operations emev2_smp_ops;
+
 #endif /* __ASM_EMEV2_H__ */

arch/arm/mach-shmobile/include/mach/r8a7779.h

@@ -360,4 +360,6 @@ extern void r8a7779_add_device_to_domain(struct r8a7779_pm_domain *r8a7779_pd,
 #define r8a7779_add_device_to_domain(pd, pdev) do { } while (0)
 #endif /* CONFIG_PM */
 
+extern struct smp_operations r8a7779_smp_ops;
+
 #endif /* __ASM_R8A7779_H__ */

arch/arm/mach-shmobile/include/mach/sh73a0.h

@@ -557,4 +557,6 @@ enum {
 #define SH73A0_PINT0_IRQ(irq) ((irq) + 700)
 #define SH73A0_PINT1_IRQ(irq) ((irq) + 732)
 
+extern struct smp_operations sh73a0_smp_ops;
+
 #endif /* __ASM_SH73A0_H__ */

arch/arm/mach-shmobile/platsmp.c

@@ -11,100 +11,11 @@
  * published by the Free Software Foundation.
  */
 #include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
-#include <linux/device.h>
 #include <linux/smp.h>
-#include <linux/io.h>
-#include <linux/of.h>
 #include <asm/hardware/gic.h>
-#include <asm/mach-types.h>
-#include <mach/common.h>
-#include <mach/emev2.h>
 
-#ifdef CONFIG_ARCH_SH73A0
-#define is_sh73a0() (machine_is_ag5evm() || machine_is_kota2() || \
-			of_machine_is_compatible("renesas,sh73a0"))
-#else
-#define is_sh73a0() (0)
-#endif
-
-#define is_r8a7779() machine_is_marzen()
-
-#ifdef CONFIG_ARCH_EMEV2
-#define is_emev2() of_machine_is_compatible("renesas,emev2")
-#else
-#define is_emev2() (0)
-#endif
-
-static unsigned int __init shmobile_smp_get_core_count(void)
-{
-	if (is_sh73a0())
-		return sh73a0_get_core_count();
-
-	if (is_r8a7779())
-		return r8a7779_get_core_count();
-
-	if (is_emev2())
-		return emev2_get_core_count();
-
-	return 1;
-}
-
-static void __init shmobile_smp_prepare_cpus(void)
-{
-	if (is_sh73a0())
-		sh73a0_smp_prepare_cpus();
-
-	if (is_r8a7779())
-		r8a7779_smp_prepare_cpus();
-
-	if (is_emev2())
-		emev2_smp_prepare_cpus();
-}
-
-int shmobile_platform_cpu_kill(unsigned int cpu)
-{
-	if (is_r8a7779())
-		return r8a7779_platform_cpu_kill(cpu);
-
-	if (is_emev2())
-		return emev2_platform_cpu_kill(cpu);
-
-	return 1;
-}
-
-void __cpuinit platform_secondary_init(unsigned int cpu)
+void __init shmobile_smp_init_cpus(unsigned int ncores)
 {
-	trace_hardirqs_off();
-
-	if (is_sh73a0())
-		sh73a0_secondary_init(cpu);
-
-	if (is_r8a7779())
-		r8a7779_secondary_init(cpu);
-
-	if (is_emev2())
-		emev2_secondary_init(cpu);
-}
-
-int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
-{
-	if (is_sh73a0())
-		return sh73a0_boot_secondary(cpu);
-
-	if (is_r8a7779())
-		return r8a7779_boot_secondary(cpu);
-
-	if (is_emev2())
-		return emev2_boot_secondary(cpu);
-
-	return -ENOSYS;
-}
-
-void __init smp_init_cpus(void)
-{
-	unsigned int ncores = shmobile_smp_get_core_count();
 	unsigned int i;
 
 	if (ncores > nr_cpu_ids) {
@@ -118,8 +29,3 @@ void __init smp_init_cpus(void)
 
 	set_smp_cross_call(gic_raise_softirq);
 }
-
-void __init platform_smp_prepare_cpus(unsigned int max_cpus)
-{
-	shmobile_smp_prepare_cpus();
-}

arch/arm/mach-shmobile/setup-emev2.c

@@ -440,6 +440,7 @@ void __init emev2_init_irq_dt(void)
 }
 
 DT_MACHINE_START(EMEV2_DT, "Generic Emma Mobile EV2 (Flattened Device Tree)")
+	.smp		= smp_ops(emev2_smp_ops),
 	.init_early	= emev2_init_delay,
 	.nr_irqs	= NR_IRQS_LEGACY,
 	.init_irq	= emev2_init_irq_dt,

arch/arm/mach-shmobile/smp-emev2.c

@@ -50,7 +50,7 @@ static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
 
 }
 
-unsigned int __init emev2_get_core_count(void)
+static unsigned int __init emev2_get_core_count(void)
 {
 	if (!scu_base) {
 		scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE);
@@ -62,17 +62,35 @@ unsigned int __init emev2_get_core_count(void)
 	return scu_base ? scu_get_core_count(scu_base) : 1;
 }
 
-int emev2_platform_cpu_kill(unsigned int cpu)
+static int emev2_platform_cpu_kill(unsigned int cpu)
 {
 	return 0; /* not supported yet */
 }
 
-void __cpuinit emev2_secondary_init(unsigned int cpu)
+static int __maybe_unused emev2_cpu_kill(unsigned int cpu)
+{
+	int k;
+
+	/* this function is running on another CPU than the offline target,
+	 * here we need wait for shutdown code in platform_cpu_die() to
+	 * finish before asking SoC-specific code to power off the CPU core.
+	 */
+	for (k = 0; k < 1000; k++) {
+		if (shmobile_cpu_is_dead(cpu))
+			return emev2_platform_cpu_kill(cpu);
+		mdelay(1);
+	}
+
+	return 0;
+}
+
+
+static void __cpuinit emev2_secondary_init(unsigned int cpu)
 {
 	gic_secondary_init(0);
 }
 
-int __cpuinit emev2_boot_secondary(unsigned int cpu)
+static int __cpuinit emev2_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	cpu = cpu_logical_map(cpu);
 
@@ -86,7 +104,7 @@ int __cpuinit emev2_boot_secondary(unsigned int cpu)
 	return 0;
 }
 
-void __init emev2_smp_prepare_cpus(void)
+static void __init emev2_smp_prepare_cpus(unsigned int max_cpus)
 {
 	int cpu = cpu_logical_map(0);
 
@@ -95,3 +113,22 @@ void __init emev2_smp_prepare_cpus(void)
 	/* enable cache coherency on CPU0 */
 	modify_scu_cpu_psr(0, 3 << (cpu * 8));
 }
+
+static void __init emev2_smp_init_cpus(void)
+{
+	unsigned int ncores = emev2_get_core_count();
+
+	shmobile_smp_init_cpus(ncores);
+}
+
+struct smp_operations emev2_smp_ops __initdata = {
+	.smp_init_cpus		= emev2_smp_init_cpus,
+	.smp_prepare_cpus	= emev2_smp_prepare_cpus,
+	.smp_secondary_init	= emev2_secondary_init,
+	.smp_boot_secondary	= emev2_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_kill		= emev2_cpu_kill,
+	.cpu_die		= shmobile_cpu_die,
+	.cpu_disable		= shmobile_cpu_disable,
+#endif
+};

arch/arm/mach-shmobile/smp-r8a7779.c

@@ -87,14 +87,14 @@ static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
 	__raw_writel(tmp, scu_base + 8);
 }
 
-unsigned int __init r8a7779_get_core_count(void)
+static unsigned int __init r8a7779_get_core_count(void)
 {
 	void __iomem *scu_base = scu_base_addr();
 
 	return scu_get_core_count(scu_base);
 }
 
-int r8a7779_platform_cpu_kill(unsigned int cpu)
+static int r8a7779_platform_cpu_kill(unsigned int cpu)
 {
 	struct r8a7779_pm_ch *ch = NULL;
 	int ret = -EIO;
@@ -113,12 +113,31 @@ int r8a7779_platform_cpu_kill(unsigned int cpu)
 	return ret ? ret : 1;
 }
 
-void __cpuinit r8a7779_secondary_init(unsigned int cpu)
+static int __maybe_unused r8a7779_cpu_kill(unsigned int cpu)
+{
+	int k;
+
+	/* this function is running on another CPU than the offline target,
+	 * here we need wait for shutdown code in platform_cpu_die() to
+	 * finish before asking SoC-specific code to power off the CPU core.
+	 */
+	for (k = 0; k < 1000; k++) {
+		if (shmobile_cpu_is_dead(cpu))
+			return r8a7779_platform_cpu_kill(cpu);
+
+		mdelay(1);
+	}
+
+	return 0;
+}
+
+
+static void __cpuinit r8a7779_secondary_init(unsigned int cpu)
 {
 	gic_secondary_init(0);
 }
 
-int __cpuinit r8a7779_boot_secondary(unsigned int cpu)
+static int __cpuinit r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	struct r8a7779_pm_ch *ch = NULL;
 	int ret = -EIO;
@@ -137,7 +156,7 @@ int __cpuinit r8a7779_boot_secondary(unsigned int cpu)
 	return ret;
 }
 
-void __init r8a7779_smp_prepare_cpus(void)
+static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
 {
 	int cpu = cpu_logical_map(0);
 
@@ -156,3 +175,22 @@ void __init r8a7779_smp_prepare_cpus(void)
 	r8a7779_platform_cpu_kill(2);
 	r8a7779_platform_cpu_kill(3);
 }
+
+static void __init r8a7779_smp_init_cpus(void)
+{
+	unsigned int ncores = r8a7779_get_core_count();
+
+	shmobile_smp_init_cpus(ncores);
+}
+
+struct smp_operations r8a7779_smp_ops  __initdata = {
+	.smp_init_cpus		= r8a7779_smp_init_cpus,
+	.smp_prepare_cpus	= r8a7779_smp_prepare_cpus,
+	.smp_secondary_init	= r8a7779_secondary_init,
+	.smp_boot_secondary	= r8a7779_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_kill		= r8a7779_cpu_kill,
+	.cpu_die		= shmobile_cpu_die,
+	.cpu_disable		= shmobile_cpu_disable,
+#endif
+};

arch/arm/mach-shmobile/smp-sh73a0.c

@@ -22,8 +22,10 @@
 #include <linux/smp.h>
 #include <linux/spinlock.h>
 #include <linux/io.h>
+#include <linux/delay.h>
 #include <mach/common.h>
 #include <asm/smp_plat.h>
+#include <mach/sh73a0.h>
 #include <asm/smp_scu.h>
 #include <asm/smp_twd.h>
 #include <asm/hardware/gic.h>
@@ -64,19 +66,19 @@ static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
 	__raw_writel(tmp, scu_base + 8);
 }
 
-unsigned int __init sh73a0_get_core_count(void)
+static unsigned int __init sh73a0_get_core_count(void)
 {
 	void __iomem *scu_base = scu_base_addr();
 
 	return scu_get_core_count(scu_base);
 }
 
-void __cpuinit sh73a0_secondary_init(unsigned int cpu)
+static void __cpuinit sh73a0_secondary_init(unsigned int cpu)
 {
 	gic_secondary_init(0);
 }
 
-int __cpuinit sh73a0_boot_secondary(unsigned int cpu)
+static int __cpuinit sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	cpu = cpu_logical_map(cpu);
 
@@ -91,7 +93,7 @@ int __cpuinit sh73a0_boot_secondary(unsigned int cpu)
 	return 0;
 }
 
-void __init sh73a0_smp_prepare_cpus(void)
+static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
 {
 	int cpu = cpu_logical_map(0);
 
@@ -104,3 +106,41 @@ void __init sh73a0_smp_prepare_cpus(void)
 	/* enable cache coherency on CPU0 */
 	modify_scu_cpu_psr(0, 3 << (cpu * 8));
 }
+
+static void __init sh73a0_smp_init_cpus(void)
+{
+	unsigned int ncores = sh73a0_get_core_count();
+
+	shmobile_smp_init_cpus(ncores);
+}
+
+static int __maybe_unused sh73a0_cpu_kill(unsigned int cpu)
+{
+	int k;
+
+	/* this function is running on another CPU than the offline target,
+	 * here we need wait for shutdown code in platform_cpu_die() to
+	 * finish before asking SoC-specific code to power off the CPU core.
+	 */
+	for (k = 0; k < 1000; k++) {
+		if (shmobile_cpu_is_dead(cpu))
+			return 1;
+
+		mdelay(1);
+	}
+
+	return 0;
+}
+
+
+struct smp_operations sh73a0_smp_ops __initdata = {
+	.smp_init_cpus		= sh73a0_smp_init_cpus,
+	.smp_prepare_cpus	= sh73a0_smp_prepare_cpus,
+	.smp_secondary_init	= sh73a0_secondary_init,
+	.smp_boot_secondary	= sh73a0_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_kill		= sh73a0_cpu_kill,
+	.cpu_die		= shmobile_cpu_die,
+	.cpu_disable		= shmobile_cpu_disable,
+#endif
+};