Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[sfrench/cifs-2.6.git] / arch / powerpc / kernel / time.c

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 5b1657540a7d22d3343830863ba635748684d5b7..92dc844299b65ff5b7d934b14e4e110a6d956547 100644 (file)
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -53,7 +53,7 @@
 #include <linux/posix-timers.h>
 #include <linux/irq.h>
 #include <linux/delay.h>
-#include <linux/perf_counter.h>
+#include <linux/perf_event.h>
 
 #include <asm/io.h>
 #include <asm/processor.h>
@@ -481,7 +481,8 @@ static int __init iSeries_tb_recal(void)
                unsigned long tb_ticks = tb - iSeries_recal_tb;
                unsigned long titan_usec = (titan - iSeries_recal_titan) >> 12;
                unsigned long new_tb_ticks_per_sec   = (tb_ticks * USEC_PER_SEC)/titan_usec;
-               unsigned long new_tb_ticks_per_jiffy = (new_tb_ticks_per_sec+(HZ/2))/HZ;
+               unsigned long new_tb_ticks_per_jiffy =
+                       DIV_ROUND_CLOSEST(new_tb_ticks_per_sec, HZ);
                long tick_diff = new_tb_ticks_per_jiffy - tb_ticks_per_jiffy;
                char sign = '+';                
                /* make sure tb_ticks_per_sec and tb_ticks_per_jiffy are consistent */
@@ -529,25 +530,25 @@ void __init iSeries_time_init_early(void)
 }
 #endif /* CONFIG_PPC_ISERIES */
 
-#if defined(CONFIG_PERF_COUNTERS) && defined(CONFIG_PPC32)
-DEFINE_PER_CPU(u8, perf_counter_pending);
+#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_PPC32)
+DEFINE_PER_CPU(u8, perf_event_pending);
 
-void set_perf_counter_pending(void)
+void set_perf_event_pending(void)
 {
-       get_cpu_var(perf_counter_pending) = 1;
+       get_cpu_var(perf_event_pending) = 1;
        set_dec(1);
-       put_cpu_var(perf_counter_pending);
+       put_cpu_var(perf_event_pending);
 }
 
-#define test_perf_counter_pending()    __get_cpu_var(perf_counter_pending)
-#define clear_perf_counter_pending()   __get_cpu_var(perf_counter_pending) = 0
+#define test_perf_event_pending()      __get_cpu_var(perf_event_pending)
+#define clear_perf_event_pending()     __get_cpu_var(perf_event_pending) = 0
 
-#else  /* CONFIG_PERF_COUNTERS && CONFIG_PPC32 */
+#else  /* CONFIG_PERF_EVENTS && CONFIG_PPC32 */
 
-#define test_perf_counter_pending()    0
-#define clear_perf_counter_pending()
+#define test_perf_event_pending()      0
+#define clear_perf_event_pending()
 
-#endif /* CONFIG_PERF_COUNTERS && CONFIG_PPC32 */
+#endif /* CONFIG_PERF_EVENTS && CONFIG_PPC32 */
 
 /*
  * For iSeries shared processors, we have to let the hypervisor
@@ -575,9 +576,9 @@ void timer_interrupt(struct pt_regs * regs)
        set_dec(DECREMENTER_MAX);
 
 #ifdef CONFIG_PPC32
-       if (test_perf_counter_pending()) {
-               clear_perf_counter_pending();
-               perf_counter_do_pending();
+       if (test_perf_event_pending()) {
+               clear_perf_event_pending();
+               perf_event_do_pending();
        }
        if (atomic_read(&ppc_n_lost_interrupts) != 0)
                do_IRQ(regs);
@@ -729,6 +730,18 @@ static int __init get_freq(char *name, int cells, unsigned long *val)
        return found;
 }
 
+/* should become __cpuinit when secondary_cpu_time_init also is */
+void start_cpu_decrementer(void)
+{
+#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
+       /* Clear any pending timer interrupts */
+       mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
+
+       /* Enable decrementer interrupt */
+       mtspr(SPRN_TCR, TCR_DIE);
+#endif /* defined(CONFIG_BOOKE) || defined(CONFIG_40x) */
+}
+
 void __init generic_calibrate_decr(void)
 {
        ppc_tb_freq = DEFAULT_TB_FREQ;          /* hardcoded default */
@@ -748,14 +761,6 @@ void __init generic_calibrate_decr(void)
                printk(KERN_ERR "WARNING: Estimating processor frequency "
                                "(not found)\n");
        }
-
-#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
-       /* Clear any pending timer interrupts */
-       mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
-
-       /* Enable decrementer interrupt */
-       mtspr(SPRN_TCR, TCR_DIE);
-#endif
 }
 
 int update_persistent_clock(struct timespec now)
@@ -921,6 +926,11 @@ static void __init init_decrementer_clockevent(void)
 
 void secondary_cpu_time_init(void)
 {
+       /* Start the decrementer on CPUs that have manual control
+        * such as BookE
+        */
+       start_cpu_decrementer();
+
        /* FIME: Should make unrelatred change to move snapshot_timebase
         * call here ! */
        register_decrementer_clockevent(smp_processor_id());
@@ -1025,6 +1035,11 @@ void __init time_init(void)
 
        write_sequnlock_irqrestore(&xtime_lock, flags);
 
+       /* Start the decrementer on CPUs that have manual control
+        * such as BookE
+        */
+       start_cpu_decrementer();
+
        /* Register the clocksource, if we're not running on iSeries */
        if (!firmware_has_feature(FW_FEATURE_ISERIES))
                clocksource_init();