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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 12:01:22 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 12:01:22 -0700
commit0a4908e19fd016d60403fc76cf38b2d08d21e2d2 (patch)
treef8f33a474bfb9835625677c76735fb27fe0a2b75 /arch/mips/kernel
parent2843483d2eb02ad104edbe8b2429fb6a39d25063 (diff)
parent6f75aaa72af19d3e4d144e13d59e71f51686b77f (diff)
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Delete totally outdated Documentation/mips/time.README [MIPS] Kill duplicated setup_irq() for cp0 timer [MIPS] Sibyte: Finish conversion to modern time APIs. [MIPS] time: Helpers to compute clocksource/event shift and mult values. [MIPS] SMTC: Build fix. [MIPS] time: Delete dead code. [MIPS] MIPSsim: Strip defconfig file to the bones.
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/cevt-r4k.c1
-rw-r--r--arch/mips/kernel/time.c92
2 files changed, 29 insertions, 64 deletions
diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
index 08b84d476c8..a915e569342 100644
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -10,6 +10,7 @@
#include <linux/interrupt.h>
#include <linux/percpu.h>
+#include <asm/smtc_ipi.h>
#include <asm/time.h>
static int mips_next_event(unsigned long delta,
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index ea7cfe766a8..c4e6866d5cb 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -40,17 +40,6 @@
#include <irq.h>
/*
- * The integer part of the number of usecs per jiffy is taken from tick,
- * but the fractional part is not recorded, so we calculate it using the
- * initial value of HZ. This aids systems where tick isn't really an
- * integer (e.g. for HZ = 128).
- */
-#define USECS_PER_JIFFY TICK_SIZE
-#define USECS_PER_JIFFY_FRAC ((unsigned long)(u32)((1000000ULL << 32) / HZ))
-
-#define TICK_SIZE (tick_nsec / 1000)
-
-/*
* forward reference
*/
DEFINE_SPINLOCK(rtc_lock);
@@ -182,84 +171,59 @@ struct clocksource clocksource_mips = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static void __init init_mips_clocksource(void)
+void __init clocksource_set_clock(struct clocksource *cs, unsigned int clock)
{
u64 temp;
u32 shift;
- if (!mips_hpt_frequency || clocksource_mips.read == null_hpt_read)
- return;
-
- /* Calclate a somewhat reasonable rating value */
- clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;
/* Find a shift value */
for (shift = 32; shift > 0; shift--) {
temp = (u64) NSEC_PER_SEC << shift;
- do_div(temp, mips_hpt_frequency);
+ do_div(temp, clock);
if ((temp >> 32) == 0)
break;
}
- clocksource_mips.shift = shift;
- clocksource_mips.mult = (u32)temp;
-
- clocksource_register(&clocksource_mips);
+ cs->shift = shift;
+ cs->mult = (u32) temp;
}
-void __init __weak plat_time_init(void)
+void __cpuinit clockevent_set_clock(struct clock_event_device *cd,
+ unsigned int clock)
{
+ u64 temp;
+ u32 shift;
+
+ /* Find a shift value */
+ for (shift = 32; shift > 0; shift--) {
+ temp = (u64) NSEC_PER_SEC << shift;
+ do_div(temp, clock);
+ if ((temp >> 32) == 0)
+ break;
+ }
+ cd->shift = shift;
+ cd->mult = (u32) temp;
}
-void __init __weak plat_timer_setup(struct irqaction *irq)
+static void __init init_mips_clocksource(void)
{
-}
+ if (!mips_hpt_frequency || clocksource_mips.read == null_hpt_read)
+ return;
-#ifdef CONFIG_MIPS_MT_SMTC
-DEFINE_PER_CPU(struct clock_event_device, smtc_dummy_clockevent_device);
+ /* Calclate a somewhat reasonable rating value */
+ clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;
-static void smtc_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
+ clocksource_set_clock(&clocksource_mips, mips_hpt_frequency);
+
+ clocksource_register(&clocksource_mips);
}
-static void mips_broadcast(cpumask_t mask)
+void __init __weak plat_time_init(void)
{
- unsigned int cpu;
-
- for_each_cpu_mask(cpu, mask)
- smtc_send_ipi(cpu, SMTC_CLOCK_TICK, 0);
}
-static void setup_smtc_dummy_clockevent_device(void)
+void __init __weak plat_timer_setup(struct irqaction *irq)
{
- //uint64_t mips_freq = mips_hpt_^frequency;
- unsigned int cpu = smp_processor_id();
- struct clock_event_device *cd;
-
- cd = &per_cpu(smtc_dummy_clockevent_device, cpu);
-
- cd->name = "SMTC";
- cd->features = CLOCK_EVT_FEAT_DUMMY;
-
- /* Calculate the min / max delta */
- cd->mult = 0; //div_sc((unsigned long) mips_freq, NSEC_PER_SEC, 32);
- cd->shift = 0; //32;
- cd->max_delta_ns = 0; //clockevent_delta2ns(0x7fffffff, cd);
- cd->min_delta_ns = 0; //clockevent_delta2ns(0x30, cd);
-
- cd->rating = 200;
- cd->irq = 17; //-1;
-// if (cpu)
-// cd->cpumask = CPU_MASK_ALL; // cpumask_of_cpu(cpu);
-// else
- cd->cpumask = cpumask_of_cpu(cpu);
-
- cd->set_mode = smtc_set_mode;
-
- cd->broadcast = mips_broadcast;
-
- clockevents_register_device(cd);
}
-#endif
void __init time_init(void)
{