ARM: SoC: convert spear13xx to SMP operations

Convert the spear13xx platform to use struct smp_operations to provide
its SMP and CPU hotplug operations.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Shiraz Hashim <shiraz.hashim@st.com>
Cc: spear-devel@list.st.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-spear13xx/hotplug.c

@@ -56,7 +56,7 @@ static inline void cpu_leave_lowpower(void)
 	: "cc");
 }
 
-static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
+static inline void spear13xx_do_lowpower(unsigned int cpu, int *spurious)
 {
 	for (;;) {
 		wfi();
@@ -79,17 +79,12 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
 	}
 }
 
-int platform_cpu_kill(unsigned int cpu)
-{
-	return 1;
-}
-
 /*
  * platform-specific code to shutdown a CPU
  *
  * Called with IRQs disabled
  */
-void __cpuinit platform_cpu_die(unsigned int cpu)
+void __ref spear13xx_cpu_die(unsigned int cpu)
 {
 	int spurious = 0;
 
@@ -97,7 +92,7 @@ void __cpuinit platform_cpu_die(unsigned int cpu)
 	 * we're ready for shutdown now, so do it
 	 */
 	cpu_enter_lowpower();
-	platform_do_lowpower(cpu, &spurious);
+	spear13xx_do_lowpower(cpu, &spurious);
 
 	/*
 	 * bring this CPU back into the world of cache
@@ -108,12 +103,3 @@ void __cpuinit platform_cpu_die(unsigned int cpu)
 	if (spurious)
 		pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
 }
-
-int platform_cpu_disable(unsigned int cpu)
-{
-	/*
-	 * we don't allow CPU 0 to be shutdown (it is still too special
-	 * e.g. clock tick interrupts)
-	 */
-	return cpu == 0 ? -EPERM : 0;
-}

arch/arm/mach-spear13xx/include/mach/generic.h

@@ -33,6 +33,9 @@ void __init spear13xx_l2x0_init(void);
 bool dw_dma_filter(struct dma_chan *chan, void *slave);
 void spear_restart(char, const char *);
 void spear13xx_secondary_startup(void);
+void __cpuinit spear13xx_cpu_die(unsigned int cpu);
+
+extern struct smp_operations spear13xx_smp_ops;
 
 #ifdef CONFIG_MACH_SPEAR1310
 void __init spear1310_clk_init(void);

arch/arm/mach-spear13xx/platsmp.c

@@ -19,6 +19,7 @@
 #include <asm/hardware/gic.h>
 #include <asm/smp_scu.h>
 #include <mach/spear.h>
+#include <mach/generic.h>
 
 /*
  * control for which core is the next to come out of the secondary
@@ -28,9 +29,8 @@ volatile int __cpuinitdata pen_release = -1;
 static DEFINE_SPINLOCK(boot_lock);
 
 static void __iomem *scu_base = IOMEM(VA_SCU_BASE);
-extern void spear13xx_secondary_startup(void);
 
-void __cpuinit platform_secondary_init(unsigned int cpu)
+static void __cpuinit spear13xx_secondary_init(unsigned int cpu)
 {
 	/*
 	 * if any interrupts are already enabled for the primary
@@ -53,7 +53,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
 	spin_unlock(&boot_lock);
 }
 
-int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+static int __cpuinit spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	unsigned long timeout;
 
@@ -97,7 +97,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
  * Initialise the CPU possible map early - this describes the CPUs
  * which may be present or become present in the system.
  */
-void __init smp_init_cpus(void)
+static void __init spear13xx_smp_init_cpus(void)
 {
 	unsigned int i, ncores = scu_get_core_count(scu_base);
 
@@ -113,7 +113,7 @@ void __init smp_init_cpus(void)
 	set_smp_cross_call(gic_raise_softirq);
 }
 
-void __init platform_smp_prepare_cpus(unsigned int max_cpus)
+static void __init spear13xx_smp_prepare_cpus(unsigned int max_cpus)
 {
 
 	scu_enable(scu_base);
@@ -125,3 +125,13 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus)
 	 */
 	__raw_writel(virt_to_phys(spear13xx_secondary_startup), SYS_LOCATION);
 }
+
+struct smp_operations spear13xx_smp_ops __initdata = {
+       .smp_init_cpus		= spear13xx_smp_init_cpus,
+       .smp_prepare_cpus	= spear13xx_smp_prepare_cpus,
+       .smp_secondary_init	= spear13xx_secondary_init,
+       .smp_boot_secondary	= spear13xx_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+       .cpu_die			= spear13xx_cpu_die,
+#endif
+};

arch/arm/mach-spear13xx/spear1310.c

@@ -78,6 +78,7 @@ static void __init spear1310_map_io(void)
 }
 
 DT_MACHINE_START(SPEAR1310_DT, "ST SPEAr1310 SoC with Flattened Device Tree")
+	.smp		=	smp_ops(spear13xx_smp_ops),
 	.map_io		=	spear1310_map_io,
 	.init_irq	=	spear13xx_dt_init_irq,
 	.handle_irq	=	gic_handle_irq,

arch/arm/mach-spear13xx/spear1340.c

@@ -182,6 +182,7 @@ static const char * const spear1340_dt_board_compat[] = {
 };
 
 DT_MACHINE_START(SPEAR1340_DT, "ST SPEAr1340 SoC with Flattened Device Tree")
+	.smp		=	smp_ops(spear13xx_smp_ops),
 	.map_io		=	spear13xx_map_io,
 	.init_irq	=	spear13xx_dt_init_irq,
 	.handle_irq	=	gic_handle_irq,