diff options
Diffstat (limited to 'arch/mips/kernel/time.c')
| -rw-r--r-- | arch/mips/kernel/time.c | 42 |
1 files changed, 16 insertions, 26 deletions
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c index 111d1baa3b2..11aab6d6bfe 100644 --- a/arch/mips/kernel/time.c +++ b/arch/mips/kernel/time.c @@ -11,7 +11,6 @@ * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ -#include <linux/clocksource.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> @@ -83,7 +82,7 @@ static void null_timer_ack(void) { /* nothing */ } /* * Null high precision timer functions for systems lacking one. */ -static unsigned int null_hpt_read(void) +static cycle_t null_hpt_read(void) { return 0; } @@ -112,7 +111,7 @@ static void c0_timer_ack(void) /* * High precision timer functions for a R4k-compatible timer. */ -static unsigned int c0_hpt_read(void) +static cycle_t c0_hpt_read(void) { return read_c0_count(); } @@ -126,8 +125,6 @@ static void __init c0_hpt_timer_init(void) int (*mips_timer_state)(void); void (*mips_timer_ack)(void); -unsigned int (*mips_hpt_read)(void); -unsigned int mips_hpt_mask = 0xffffffff; /* last time when xtime and rtc are sync'ed up */ static long last_rtc_update; @@ -269,8 +266,7 @@ static struct irqaction timer_irqaction = { static unsigned int __init calibrate_hpt(void) { - u64 frequency; - u32 hpt_start, hpt_end, hpt_count, hz; + cycle_t frequency, hpt_start, hpt_end, hpt_count, hz; const int loops = HZ / 10; int log_2_loops = 0; @@ -296,28 +292,23 @@ static unsigned int __init calibrate_hpt(void) * during the calculated number of periods between timer * interrupts. */ - hpt_start = mips_hpt_read(); + hpt_start = clocksource_mips.read(); do { while (mips_timer_state()); while (!mips_timer_state()); } while (--i); - hpt_end = mips_hpt_read(); + hpt_end = clocksource_mips.read(); - hpt_count = (hpt_end - hpt_start) & mips_hpt_mask; + hpt_count = (hpt_end - hpt_start) & clocksource_mips.mask; hz = HZ; - frequency = (u64)hpt_count * (u64)hz; + frequency = hpt_count * hz; return frequency >> log_2_loops; } -static cycle_t read_mips_hpt(void) -{ - return (cycle_t)mips_hpt_read(); -} - -static struct clocksource clocksource_mips = { +struct clocksource clocksource_mips = { .name = "MIPS", - .read = read_mips_hpt, + .mask = 0xffffffff, .is_continuous = 1, }; @@ -326,7 +317,7 @@ static void __init init_mips_clocksource(void) u64 temp; u32 shift; - if (!mips_hpt_frequency || mips_hpt_read == null_hpt_read) + if (!mips_hpt_frequency || clocksource_mips.read == null_hpt_read) return; /* Calclate a somewhat reasonable rating value */ @@ -340,7 +331,6 @@ static void __init init_mips_clocksource(void) } clocksource_mips.shift = shift; clocksource_mips.mult = (u32)temp; - clocksource_mips.mask = mips_hpt_mask; clocksource_register(&clocksource_mips); } @@ -360,19 +350,19 @@ void __init time_init(void) -xtime.tv_sec, -xtime.tv_nsec); /* Choose appropriate high precision timer routines. */ - if (!cpu_has_counter && !mips_hpt_read) + if (!cpu_has_counter && !clocksource_mips.read) /* No high precision timer -- sorry. */ - mips_hpt_read = null_hpt_read; + clocksource_mips.read = null_hpt_read; else if (!mips_hpt_frequency && !mips_timer_state) { /* A high precision timer of unknown frequency. */ - if (!mips_hpt_read) + if (!clocksource_mips.read) /* No external high precision timer -- use R4k. */ - mips_hpt_read = c0_hpt_read; + clocksource_mips.read = c0_hpt_read; } else { /* We know counter frequency. Or we can get it. */ - if (!mips_hpt_read) { + if (!clocksource_mips.read) { /* No external high precision timer -- use R4k. */ - mips_hpt_read = c0_hpt_read; + clocksource_mips.read = c0_hpt_read; if (!mips_timer_state) { /* No external timer interrupt -- use R4k. */ |