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

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 21 insertions, 63 deletions

diff --git a/arch/arm/mach-realview/localtimer.c b/arch/arm/mach-realview/localtimer.c
index 1c01d13460f0..cd98e7acd94d 100644
--- a/arch/arm/mach-realview/localtimer.c
+++ b/arch/arm/mach-realview/localtimer.c
@@ -11,10 +11,8 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
-#include <linux/device.h>
 #include <linux/smp.h>
 #include <linux/jiffies.h>
-#include <linux/percpu.h>
 #include <linux/clockchips.h>
 #include <linux/irq.h>
 #include <linux/io.h>
@@ -24,18 +22,6 @@
 #include <mach/hardware.h>
 #include <asm/irq.h>
 
-static DEFINE_PER_CPU(struct clock_event_device, local_clockevent);
-
-/*
- * Used on SMP for either the local timer or IPI_TIMER
- */
-void local_timer_interrupt(void)
-{
-        struct clock_event_device *clk = &__get_cpu_var(local_clockevent);
-
-        clk->event_handler(clk);
-}
-
 #ifdef CONFIG_LOCAL_TIMERS
 
 /* set up by the platform code */
@@ -44,7 +30,7 @@ void __iomem *twd_base;
 static unsigned long mpcore_timer_rate;
 
 static void local_timer_set_mode(enum clock_event_mode mode,
-                                 struct clock_event_device *clk)
+                                 struct clock_event_device *evt)
 {
         unsigned long ctrl;
 
@@ -140,32 +126,29 @@ static void __cpuinit twd_calibrate_rate(void)
 /*
  * Setup the local clock events for a CPU.
  */
-void __cpuinit local_timer_setup(void)
+void __cpuinit local_timer_setup(struct clock_event_device *evt)
 {
-        unsigned int cpu = smp_processor_id();
-        struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
         unsigned long flags;
 
         twd_calibrate_rate();
 
-        clk->name               = "local_timer";
-        clk->features           = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
-        clk->rating             = 350;
-        clk->set_mode           = local_timer_set_mode;
-        clk->set_next_event     = local_timer_set_next_event;
-        clk->irq                = IRQ_LOCALTIMER;
-        clk->cpumask            = cpumask_of(cpu);
-        clk->shift              = 20;
-        clk->mult               = div_sc(mpcore_timer_rate, NSEC_PER_SEC, clk->shift);
-        clk->max_delta_ns       = clockevent_delta2ns(0xffffffff, clk);
-        clk->min_delta_ns       = clockevent_delta2ns(0xf, clk);
+        evt->name               = "local_timer";
+        evt->features           = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
+        evt->rating             = 350;
+        evt->set_mode           = local_timer_set_mode;
+        evt->set_next_event     = local_timer_set_next_event;
+        evt->irq                = IRQ_LOCALTIMER;
+        evt->shift              = 20;
+        evt->mult               = div_sc(mpcore_timer_rate, NSEC_PER_SEC, evt->shift);
+        evt->max_delta_ns       = clockevent_delta2ns(0xffffffff, evt);
+        evt->min_delta_ns       = clockevent_delta2ns(0xf, evt);
 
         /* Make sure our local interrupt controller has this enabled */
         local_irq_save(flags);
         get_irq_chip(IRQ_LOCALTIMER)->unmask(IRQ_LOCALTIMER);
         local_irq_restore(flags);
 
-        clockevents_register_device(clk);
+        clockevents_register_device(evt);
 }
 
 /*
@@ -176,29 +159,4 @@ void __cpuexit local_timer_stop(void)
         __raw_writel(0, twd_base + TWD_TIMER_CONTROL);
 }
 
-#else   /* CONFIG_LOCAL_TIMERS */
-
-static void dummy_timer_set_mode(enum clock_event_mode mode,
-                                 struct clock_event_device *clk)
-{
-}
-
-void __cpuinit local_timer_setup(void)
-{
-        unsigned int cpu = smp_processor_id();
-        struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
-
-        clk->name               = "dummy_timer";
-        clk->features           = CLOCK_EVT_FEAT_ONESHOT |
-                                  CLOCK_EVT_FEAT_PERIODIC |
-                                  CLOCK_EVT_FEAT_DUMMY;
-        clk->rating             = 400;
-        clk->mult               = 1;
-        clk->set_mode           = dummy_timer_set_mode;
-        clk->broadcast          = smp_timer_broadcast;
-        clk->cpumask            = cpumask_of(cpu);
-
-        clockevents_register_device(clk);
-}
-
-#endif  /* !CONFIG_LOCAL_TIMERS */
+#endif  /* CONFIG_LOCAL_TIMERS */
diff --git a/arch/arm/mach-realview/platsmp.c b/arch/arm/mach-realview/platsmp.c
index 30a9c68591f6..b34d3a57ce93 100644
--- a/arch/arm/mach-realview/platsmp.c
+++ b/arch/arm/mach-realview/platsmp.c
@@ -19,6 +19,7 @@
 #include <asm/cacheflush.h>
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
+#include <asm/localtimer.h>
 
 #include <mach/board-eb.h>
 #include <mach/board-pb11mp.h>
@@ -217,13 +218,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
         if (max_cpus > ncores)
                 max_cpus = ncores;
 
-#if defined(CONFIG_LOCAL_TIMERS) || defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
-        /*
-         * Enable the local timer or broadcast device for the boot CPU.
-         */
-        local_timer_setup();
-#endif
-
         /*
          * Initialise the present map, which describes the set of CPUs
          * actually populated at the present time.
@@ -239,6 +233,12 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
          * WFI
          */
         if (max_cpus > 1) {
+                /*
+                 * Enable the local timer or broadcast device for the
+                 * boot CPU, but only if we have more than one CPU.
+                 */
+                percpu_timer_setup();
+
                 scu_enable();
                 poke_milo();
         }