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-rw-r--r--arch/arm/kernel/setup.c4
-rw-r--r--arch/arm/kernel/smp.c62
2 files changed, 64 insertions, 2 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index a81dcecc734..725f9f2a954 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -977,8 +977,10 @@ void __init setup_arch(char **cmdline_p)
unflatten_device_tree();
#ifdef CONFIG_SMP
- if (is_smp())
+ if (is_smp()) {
+ smp_set_ops(mdesc->smp);
smp_init_cpus();
+ }
#endif
reserve_crashkernel();
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index ebd8ad274d7..d9241885521 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -19,7 +19,6 @@
#include <linux/mm.h>
#include <linux/err.h>
#include <linux/cpu.h>
-#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/irq.h>
#include <linux/percpu.h>
@@ -27,6 +26,7 @@
#include <linux/completion.h>
#include <linux/atomic.h>
+#include <asm/smp.h>
#include <asm/cacheflush.h>
#include <asm/cpu.h>
#include <asm/cputype.h>
@@ -42,6 +42,7 @@
#include <asm/ptrace.h>
#include <asm/localtimer.h>
#include <asm/smp_plat.h>
+#include <asm/mach/arch.h>
/*
* as from 2.5, kernels no longer have an init_tasks structure
@@ -60,6 +61,14 @@ enum ipi_msg_type {
static DECLARE_COMPLETION(cpu_running);
+static struct smp_operations smp_ops;
+
+void __init smp_set_ops(struct smp_operations *ops)
+{
+ if (ops)
+ smp_ops = *ops;
+};
+
int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
{
int ret;
@@ -100,9 +109,60 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
return ret;
}
+/* platform specific SMP operations */
+void __attribute__((weak)) __init smp_init_cpus(void)
+{
+ if (smp_ops.smp_init_cpus)
+ smp_ops.smp_init_cpus();
+}
+
+void __attribute__((weak)) __init platform_smp_prepare_cpus(unsigned int max_cpus)
+{
+ if (smp_ops.smp_prepare_cpus)
+ smp_ops.smp_prepare_cpus(max_cpus);
+}
+
+void __attribute__((weak)) __cpuinit platform_secondary_init(unsigned int cpu)
+{
+ if (smp_ops.smp_secondary_init)
+ smp_ops.smp_secondary_init(cpu);
+}
+
+int __attribute__((weak)) __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ if (smp_ops.smp_boot_secondary)
+ return smp_ops.smp_boot_secondary(cpu, idle);
+ return -ENOSYS;
+}
+
#ifdef CONFIG_HOTPLUG_CPU
static void percpu_timer_stop(void);
+int __attribute__((weak)) platform_cpu_kill(unsigned int cpu)
+{
+ if (smp_ops.cpu_kill)
+ return smp_ops.cpu_kill(cpu);
+ return 1;
+}
+
+void __attribute__((weak)) platform_cpu_die(unsigned int cpu)
+{
+ if (smp_ops.cpu_die)
+ smp_ops.cpu_die(cpu);
+}
+
+int __attribute__((weak)) platform_cpu_disable(unsigned int cpu)
+{
+ if (smp_ops.cpu_disable)
+ return smp_ops.cpu_disable(cpu);
+
+ /*
+ * By default, allow disabling all CPUs except the first one,
+ * since this is special on a lot of platforms, e.g. because
+ * of clock tick interrupts.
+ */
+ return cpu == 0 ? -EPERM : 0;
+}
/*
* __cpu_disable runs on the processor to be shutdown.
*/