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Diffstat (limited to 'arch/arm/kernel/smp.c')
-rw-r--r--arch/arm/kernel/smp.c53
1 files changed, 27 insertions, 26 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 2b26dca2168..2cee7d1eb95 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -227,20 +227,6 @@ void __ref cpu_die(void)
}
#endif /* CONFIG_HOTPLUG_CPU */
-int __cpu_logical_map[NR_CPUS];
-
-void __init smp_setup_processor_id(void)
-{
- int i;
- u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0;
-
- cpu_logical_map(0) = cpu;
- for (i = 1; i < NR_CPUS; ++i)
- cpu_logical_map(i) = i == cpu ? 0 : i;
-
- printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu);
-}
-
/*
* Called by both boot and secondaries to move global data into
* per-processor storage.
@@ -254,6 +240,8 @@ static void __cpuinit smp_store_cpu_info(unsigned int cpuid)
store_cpu_topology(cpuid);
}
+static void percpu_timer_setup(void);
+
/*
* This is the secondary CPU boot entry. We're using this CPUs
* idle thread stack, but a set of temporary page tables.
@@ -304,13 +292,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
*/
percpu_timer_setup();
- while (!cpu_active(cpu))
- cpu_relax();
-
- /*
- * cpu_active bit is set, so it's safe to enalbe interrupts
- * now.
- */
local_irq_enable();
local_fiq_enable();
@@ -438,9 +419,7 @@ static DEFINE_PER_CPU(struct clock_event_device, percpu_clockevent);
static void ipi_timer(void)
{
struct clock_event_device *evt = &__get_cpu_var(percpu_clockevent);
- irq_enter();
evt->event_handler(evt);
- irq_exit();
}
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
@@ -470,7 +449,20 @@ static void __cpuinit broadcast_timer_setup(struct clock_event_device *evt)
clockevents_register_device(evt);
}
-void __cpuinit percpu_timer_setup(void)
+static struct local_timer_ops *lt_ops;
+
+#ifdef CONFIG_LOCAL_TIMERS
+int local_timer_register(struct local_timer_ops *ops)
+{
+ if (lt_ops)
+ return -EBUSY;
+
+ lt_ops = ops;
+ return 0;
+}
+#endif
+
+static void __cpuinit percpu_timer_setup(void)
{
unsigned int cpu = smp_processor_id();
struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
@@ -478,7 +470,7 @@ void __cpuinit percpu_timer_setup(void)
evt->cpumask = cpumask_of(cpu);
evt->broadcast = smp_timer_broadcast;
- if (local_timer_setup(evt))
+ if (!lt_ops || lt_ops->setup(evt))
broadcast_timer_setup(evt);
}
@@ -493,7 +485,8 @@ static void percpu_timer_stop(void)
unsigned int cpu = smp_processor_id();
struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
- local_timer_stop(evt);
+ if (lt_ops)
+ lt_ops->stop(evt);
}
#endif
@@ -543,7 +536,9 @@ void handle_IPI(int ipinr, struct pt_regs *regs)
switch (ipinr) {
case IPI_TIMER:
+ irq_enter();
ipi_timer();
+ irq_exit();
break;
case IPI_RESCHEDULE:
@@ -551,15 +546,21 @@ void handle_IPI(int ipinr, struct pt_regs *regs)
break;
case IPI_CALL_FUNC:
+ irq_enter();
generic_smp_call_function_interrupt();
+ irq_exit();
break;
case IPI_CALL_FUNC_SINGLE:
+ irq_enter();
generic_smp_call_function_single_interrupt();
+ irq_exit();
break;
case IPI_CPU_STOP:
+ irq_enter();
ipi_cpu_stop(cpu);
+ irq_exit();
break;
default: