diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/i8253.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/apb_timer.c | 10 | ||||
| -rw-r--r-- | arch/x86/kernel/i8253.c | 80 | ||||
| -rw-r--r-- | arch/x86/kernel/kvmclock.c | 6 | ||||
| -rw-r--r-- | arch/x86/lguest/boot.c | 4 | ||||
| -rw-r--r-- | arch/x86/platform/uv/uv_time.c | 6 | ||||
| -rw-r--r-- | arch/x86/xen/time.c | 6 |
8 files changed, 9 insertions, 106 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 650bb8c47ec..7a0ff52c73f 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -8,6 +8,7 @@ config 64BIT config X86_32 def_bool !64BIT + select CLKSRC_I8253 config X86_64 def_bool 64BIT diff --git a/arch/x86/include/asm/i8253.h b/arch/x86/include/asm/i8253.h index fc1f579fb96..65aaa91d585 100644 --- a/arch/x86/include/asm/i8253.h +++ b/arch/x86/include/asm/i8253.h @@ -6,6 +6,8 @@ #define PIT_CH0 0x40 #define PIT_CH2 0x42 +#define PIT_LATCH LATCH + extern raw_spinlock_t i8253_lock; extern struct clock_event_device *global_clock_event; diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c index cd1ffed4ee2..289e92862fd 100644 --- a/arch/x86/kernel/apb_timer.c +++ b/arch/x86/kernel/apb_timer.c @@ -177,7 +177,6 @@ static struct clocksource clocksource_apbt = { .rating = APBT_CLOCKSOURCE_RATING, .read = apbt_read_clocksource, .mask = APBT_MASK, - .shift = APBT_SHIFT, .flags = CLOCK_SOURCE_IS_CONTINUOUS, .resume = apbt_restart_clocksource, }; @@ -543,14 +542,7 @@ static int apbt_clocksource_register(void) if (t1 == apbt_read_clocksource(&clocksource_apbt)) panic("APBT counter not counting. APBT disabled\n"); - /* - * initialize and register APBT clocksource - * convert that to ns/clock cycle - * mult = (ns/c) * 2^APBT_SHIFT - */ - clocksource_apbt.mult = div_sc(MSEC_PER_SEC, - (unsigned long) apbt_freq, APBT_SHIFT); - clocksource_register(&clocksource_apbt); + clocksource_register_khz(&clocksource_apbt, (u32)apbt_freq*1000); return 0; } diff --git a/arch/x86/kernel/i8253.c b/arch/x86/kernel/i8253.c index 2dfd3159744..577e90cadae 100644 --- a/arch/x86/kernel/i8253.c +++ b/arch/x86/kernel/i8253.c @@ -117,81 +117,6 @@ void __init setup_pit_timer(void) } #ifndef CONFIG_X86_64 -/* - * Since the PIT overflows every tick, its not very useful - * to just read by itself. So use jiffies to emulate a free - * running counter: - */ -static cycle_t pit_read(struct clocksource *cs) -{ - static int old_count; - static u32 old_jifs; - unsigned long flags; - int count; - u32 jifs; - - raw_spin_lock_irqsave(&i8253_lock, flags); - /* - * Although our caller may have the read side of xtime_lock, - * this is now a seqlock, and we are cheating in this routine - * by having side effects on state that we cannot undo if - * there is a collision on the seqlock and our caller has to - * retry. (Namely, old_jifs and old_count.) So we must treat - * jiffies as volatile despite the lock. We read jiffies - * before latching the timer count to guarantee that although - * the jiffies value might be older than the count (that is, - * the counter may underflow between the last point where - * jiffies was incremented and the point where we latch the - * count), it cannot be newer. - */ - jifs = jiffies; - outb_pit(0x00, PIT_MODE); /* latch the count ASAP */ - count = inb_pit(PIT_CH0); /* read the latched count */ - count |= inb_pit(PIT_CH0) << 8; - - /* VIA686a test code... reset the latch if count > max + 1 */ - if (count > LATCH) { - outb_pit(0x34, PIT_MODE); - outb_pit(LATCH & 0xff, PIT_CH0); - outb_pit(LATCH >> 8, PIT_CH0); - count = LATCH - 1; - } - - /* - * It's possible for count to appear to go the wrong way for a - * couple of reasons: - * - * 1. The timer counter underflows, but we haven't handled the - * resulting interrupt and incremented jiffies yet. - * 2. Hardware problem with the timer, not giving us continuous time, - * the counter does small "jumps" upwards on some Pentium systems, - * (see c't 95/10 page 335 for Neptun bug.) - * - * Previous attempts to handle these cases intelligently were - * buggy, so we just do the simple thing now. - */ - if (count > old_count && jifs == old_jifs) - count = old_count; - - old_count = count; - old_jifs = jifs; - - raw_spin_unlock_irqrestore(&i8253_lock, flags); - - count = (LATCH - 1) - count; - - return (cycle_t)(jifs * LATCH) + count; -} - -static struct clocksource pit_cs = { - .name = "pit", - .rating = 110, - .read = pit_read, - .mask = CLOCKSOURCE_MASK(32), - .mult = 0, - .shift = 20, -}; - static int __init init_pit_clocksource(void) { /* @@ -205,10 +130,7 @@ static int __init init_pit_clocksource(void) pit_ce.mode != CLOCK_EVT_MODE_PERIODIC) return 0; - pit_cs.mult = clocksource_hz2mult(CLOCK_TICK_RATE, pit_cs.shift); - - return clocksource_register(&pit_cs); + return clocksource_i8253_init(); } arch_initcall(init_pit_clocksource); - #endif /* !CONFIG_X86_64 */ diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index f98d3eafe07..6389a6bca11 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -26,8 +26,6 @@ #include <asm/x86_init.h> #include <asm/reboot.h> -#define KVM_SCALE 22 - static int kvmclock = 1; static int msr_kvm_system_time = MSR_KVM_SYSTEM_TIME; static int msr_kvm_wall_clock = MSR_KVM_WALL_CLOCK; @@ -120,8 +118,6 @@ static struct clocksource kvm_clock = { .read = kvm_clock_get_cycles, .rating = 400, .mask = CLOCKSOURCE_MASK(64), - .mult = 1 << KVM_SCALE, - .shift = KVM_SCALE, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -203,7 +199,7 @@ void __init kvmclock_init(void) machine_ops.crash_shutdown = kvm_crash_shutdown; #endif kvm_get_preset_lpj(); - clocksource_register(&kvm_clock); + clocksource_register_hz(&kvm_clock, NSEC_PER_SEC); pv_info.paravirt_enabled = 1; pv_info.name = "KVM"; diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 395bf0114aa..e191c096ab9 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -913,8 +913,6 @@ static struct clocksource lguest_clock = { .rating = 200, .read = lguest_clock_read, .mask = CLOCKSOURCE_MASK(64), - .mult = 1 << 22, - .shift = 22, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -997,7 +995,7 @@ static void lguest_time_init(void) /* Set up the timer interrupt (0) to go to our simple timer routine */ irq_set_handler(0, lguest_time_irq); - clocksource_register(&lguest_clock); + clocksource_register_hz(&lguest_clock, NSEC_PER_SEC); /* We can't set cpumask in the initializer: damn C limitations! Set it * here and register our timer device. */ diff --git a/arch/x86/platform/uv/uv_time.c b/arch/x86/platform/uv/uv_time.c index 9daf5d1af9f..0eb90184515 100644 --- a/arch/x86/platform/uv/uv_time.c +++ b/arch/x86/platform/uv/uv_time.c @@ -40,7 +40,6 @@ static struct clocksource clocksource_uv = { .rating = 400, .read = uv_read_rtc, .mask = (cycle_t)UVH_RTC_REAL_TIME_CLOCK_MASK, - .shift = 10, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -372,14 +371,11 @@ static __init int uv_rtc_setup_clock(void) if (!is_uv_system()) return -ENODEV; - clocksource_uv.mult = clocksource_hz2mult(sn_rtc_cycles_per_second, - clocksource_uv.shift); - /* If single blade, prefer tsc */ if (uv_num_possible_blades() == 1) clocksource_uv.rating = 250; - rc = clocksource_register(&clocksource_uv); + rc = clocksource_register_hz(&clocksource_uv, sn_rtc_cycles_per_second); if (rc) printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc); else diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index bd4ffd7d958..5158c505bef 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -26,8 +26,6 @@ #include "xen-ops.h" -#define XEN_SHIFT 22 - /* Xen may fire a timer up to this many ns early */ #define TIMER_SLOP 100000 #define NS_PER_TICK (1000000000LL / HZ) @@ -211,8 +209,6 @@ static struct clocksource xen_clocksource __read_mostly = { .rating = 400, .read = xen_clocksource_get_cycles, .mask = ~0, - .mult = 1<<XEN_SHIFT, /* time directly in nanoseconds */ - .shift = XEN_SHIFT, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -448,7 +444,7 @@ static void __init xen_time_init(void) int cpu = smp_processor_id(); struct timespec tp; - clocksource_register(&xen_clocksource); + clocksource_register_hz(&xen_clocksource, NSEC_PER_SEC); if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL) == 0) { /* Successfully turned off 100Hz tick, so we have the |