diff options
| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 12:31:10 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 12:31:10 (GMT) |
| commit | ee238e5ca66858f80170f87724f84d67183b069a (patch) | |
| tree | c08fe7edeac9b55fad0be5f7050cc3ddf8796232 /arch/x86/kernel/time_64.c | |
| parent | 49a697871e2edcbc9cc682466bc4f2316b854d23 (diff) | |
| download | linux-ee238e5ca66858f80170f87724f84d67183b069a.tar.xz | |
x86: prepare time related functions for paravirt
This patch add provisions for time related functions so they
can be later replaced by paravirt versions.
it basically encloses {g,s}et_wallclock inside the
already existent functions update_persistent_clock and
read_persistent_clock, and defines {s,g}et_wallclock
to the core of such functions.
it also allow for a later-on-game time initialization, as done
by i386. Paravirt guests can set a function to do their own
initialization this way.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/time_64.c')
| -rw-r--r-- | arch/x86/kernel/time_64.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c index bf0bcc9..91d4d49 100644 --- a/arch/x86/kernel/time_64.c +++ b/arch/x86/kernel/time_64.c @@ -21,6 +21,8 @@ #include <asm/hpet.h> #include <asm/nmi.h> #include <asm/vgtod.h> +#include <asm/time.h> +#include <asm/timer.h> volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES; @@ -54,7 +56,7 @@ static irqreturn_t timer_event_interrupt(int irq, void *dev_id) /* calibrate_cpu is used on systems with fixed rate TSCs to determine * processor frequency */ #define TICK_COUNT 100000000 -static unsigned int __init tsc_calibrate_cpu_khz(void) +unsigned long __init native_calculate_cpu_khz(void) { int tsc_start, tsc_now; int i, no_ctr_free; @@ -104,20 +106,23 @@ static struct irqaction irq0 = { .name = "timer" }; -void __init time_init(void) +void __init hpet_time_init(void) { if (!hpet_enable()) setup_pit_timer(); setup_irq(0, &irq0); +} +void __init time_init(void) +{ tsc_calibrate(); cpu_khz = tsc_khz; if (cpu_has(&boot_cpu_data, X86_FEATURE_CONSTANT_TSC) && boot_cpu_data.x86_vendor == X86_VENDOR_AMD && boot_cpu_data.x86 == 16) - cpu_khz = tsc_calibrate_cpu_khz(); + cpu_khz = calculate_cpu_khz(); if (unsynchronized_tsc()) mark_tsc_unstable("TSCs unsynchronized"); @@ -130,4 +135,5 @@ void __init time_init(void) printk(KERN_INFO "time.c: Detected %d.%03d MHz processor.\n", cpu_khz / 1000, cpu_khz % 1000); init_tsc_clocksource(); + late_time_init = choose_time_init(); } |