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authorThomas Gleixner <tglx@linutronix.de>2009-08-20 16:07:40 +0200
committerThomas Gleixner <tglx@linutronix.de>2009-08-31 09:35:46 +0200
commit454ede7eebf91b92ab1eafe10c6b6ed04de29bf8 (patch)
treeeac4f80f71d1f545c75db80810ff27a53ebcd8c1 /arch/x86
parent0be6939422eb2f54df4b3d8763c569c6759c1a42 (diff)
downloadblackbird-op-linux-454ede7eebf91b92ab1eafe10c6b6ed04de29bf8.tar.gz
blackbird-op-linux-454ede7eebf91b92ab1eafe10c6b6ed04de29bf8.zip
x86: Make timer setup and global variables the same in time_32/64.c
The timer and timer irq setup code is identical in 32 and 64 bit. Make it the same formatting as well. Also add the global variables under the necessary ifdefs to both files. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/time_32.c8
-rw-r--r--arch/x86/kernel/time_64.c38
2 files changed, 35 insertions, 11 deletions
diff --git a/arch/x86/kernel/time_32.c b/arch/x86/kernel/time_32.c
index ec729cdcfa3d..186abc577b2b 100644
--- a/arch/x86/kernel/time_32.c
+++ b/arch/x86/kernel/time_32.c
@@ -27,6 +27,10 @@
int timer_ack;
#endif
+#ifdef CONFIG_X86_64
+volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
+#endif
+
unsigned long profile_pc(struct pt_regs *regs)
{
unsigned long pc = instruction_pointer(regs);
@@ -53,9 +57,7 @@ unsigned long profile_pc(struct pt_regs *regs)
EXPORT_SYMBOL(profile_pc);
/*
- * This is the same as the above, except we _also_ save the current
- * Time Stamp Counter value at the time of the timer interrupt, so that
- * we later on can estimate the time of day more exactly.
+ * Default timer interrupt handler for PIT/HPET
*/
static irqreturn_t timer_interrupt(int irq, void *dev_id)
{
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c
index 7db3912b8692..78cbdf5c006b 100644
--- a/arch/x86/kernel/time_64.c
+++ b/arch/x86/kernel/time_64.c
@@ -23,7 +23,13 @@
#include <asm/time.h>
#include <asm/nmi.h>
+#if defined(CONFIG_X86_32) && defined(CONFIG_X86_IO_APIC)
+int timer_ack;
+#endif
+
+#ifdef CONFIG_X86_64
volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
+#endif
unsigned long profile_pc(struct pt_regs *regs)
{
@@ -47,8 +53,12 @@ unsigned long profile_pc(struct pt_regs *regs)
}
EXPORT_SYMBOL(profile_pc);
+/*
+ * Default timer interrupt handler for PIT/HPET
+ */
static irqreturn_t timer_interrupt(int irq, void *dev_id)
{
+ /* Keep nmi watchdog up to date */
inc_irq_stat(irq0_irqs);
/* Optimized out for !IO_APIC and x86_64 */
@@ -74,8 +84,10 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-/* calibrate_cpu is used on systems with fixed rate TSCs to determine
- * processor frequency */
+/*
+ * calibrate_cpu is used on systems with fixed rate TSCs to determine
+ * processor frequency
+ */
#define TICK_COUNT 100000000
unsigned long __init calibrate_cpu(void)
{
@@ -122,18 +134,24 @@ unsigned long __init calibrate_cpu(void)
return pmc_now * tsc_khz / (tsc_now - tsc_start);
}
-static struct irqaction irq0 = {
- .handler = timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_IRQPOLL | IRQF_NOBALANCING | IRQF_TIMER,
- .name = "timer"
+static struct irqaction irq0 = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
+ .name = "timer"
};
+void __init setup_default_timer_irq(void)
+{
+ irq0.mask = cpumask_of_cpu(0);
+ setup_irq(0, &irq0);
+}
+
+/* Default timer init function */
void __init hpet_time_init(void)
{
if (!hpet_enable())
setup_pit_timer();
-
- setup_irq(0, &irq0);
+ setup_default_timer_irq();
}
static void x86_late_time_init(void)
@@ -141,6 +159,10 @@ static void x86_late_time_init(void)
x86_init.timers.timer_init();
}
+/*
+ * Initialize TSC and delay the periodic timer init to
+ * late x86_late_time_init() so ioremap works.
+ */
void __init time_init(void)
{
tsc_init();
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