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>

1 files changed, 42 insertions, 5 deletions

diff --git a/arch/arm/mach-shmobile/smp-emev2.c b/arch/arm/mach-shmobile/smp-emev2.c
index 6a35c4a31e6..f978c5d0e1a 100644
--- a/arch/arm/mach-shmobile/smp-emev2.c
+++ b/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
+};