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[ARM] smp: move core localtimer support out of platform specific files

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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2009-05-17 18:58:34 +01:00
committed by Russell King
parent ee348d5a1d
commit bc28248ee2
6 changed files with 121 additions and 111 deletions
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56
arch/arm/kernel/smp.c
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@ -22,6 +22,8 @@
#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/irq.h>
#include <linux/percpu.h>
#include <linux/clockchips.h>
#include <asm/atomic.h>
#include <asm/cacheflush.h>
@ -32,6 +34,7 @@
#include <asm/processor.h>
#include <asm/tlbflush.h>
#include <asm/ptrace.h>
#include <asm/localtimer.h>
/*
* as from 2.5, kernels no longer have an init_tasks structure
@ -274,9 +277,9 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
local_fiq_enable();
/*
* Setup local timer for this CPU.
* Setup the percpu timer for this CPU.
*/
local_timer_setup();
percpu_timer_setup();
calibrate_delay();
@ -383,10 +386,16 @@ void show_local_irqs(struct seq_file *p)
seq_putc(p, '\n');
}
/*
* Timer (local or broadcast) support
*/
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();
local_timer_interrupt();
evt->event_handler(evt);
irq_exit();
}
@ -405,6 +414,42 @@ asmlinkage void __exception do_local_timer(struct pt_regs *regs)
}
#endif
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
static void smp_timer_broadcast(const struct cpumask *mask)
{
send_ipi_message(mask, IPI_TIMER);
}
static void broadcast_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
}
static void local_timer_setup(struct clock_event_device *evt)
{
evt->name = "dummy_timer";
evt->features = CLOCK_EVT_FEAT_ONESHOT |
CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_DUMMY;
evt->rating = 400;
evt->mult = 1;
evt->set_mode = broadcast_timer_set_mode;
evt->broadcast = smp_timer_broadcast;
clockevents_register_device(evt);
}
#endif
void __cpuinit percpu_timer_setup(void)
{
unsigned int cpu = smp_processor_id();
struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
evt->cpumask = cpumask_of(cpu);
local_timer_setup(evt);
}
static DEFINE_SPINLOCK(stop_lock);
/*
@ -501,11 +546,6 @@ void smp_send_reschedule(int cpu)
send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE);
}
void smp_timer_broadcast(const struct cpumask *mask)
{
send_ipi_message(mask, IPI_TIMER);
}
void smp_send_stop(void)
{
cpumask_t mask = cpu_online_map;