Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=801740971af7c6256b7ad2472706d43ed008fd3d
Commit: 801740971af7c6256b7ad2472706d43ed008fd3d
Parent: 7ffeeb1e03c4fc1c7e8434c5496018dd035f8924
Author: Thomas Gleixner <[EMAIL PROTECTED]>
AuthorDate: Fri Oct 12 23:04:06 2007 +0200
Committer: Thomas Gleixner <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 23:04:06 2007 +0200
x86_64: prepare apic code for clock events
Change __setup_APIC_LVTT so it takes the arguments which are necessary
for the later clock events switch.
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
Signed-off-by: Chris Wright <[EMAIL PROTECTED]>
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Arjan van de Ven <[EMAIL PROTECTED]>
---
arch/x86/kernel/apic_64.c | 23 +++++++++++++++--------
1 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index 48206bb..ce2f801 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic_64.c
@@ -759,14 +759,14 @@ void __init init_apic_mappings(void)
#define APIC_DIVISOR 16
-static void __setup_APIC_LVTT(unsigned int clocks)
+static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen)
{
unsigned int lvtt_value, tmp_value;
- int cpu = smp_processor_id();
-
- lvtt_value = APIC_LVT_TIMER_PERIODIC | LOCAL_TIMER_VECTOR;
- if (cpu_isset(cpu, timer_interrupt_broadcast_ipi_mask))
+ lvtt_value = LOCAL_TIMER_VECTOR;
+ if (!oneshot)
+ lvtt_value |= APIC_LVT_TIMER_PERIODIC;
+ if (!irqen)
lvtt_value |= APIC_LVT_MASKED;
apic_write(APIC_LVTT, lvtt_value);
@@ -779,12 +779,14 @@ static void __setup_APIC_LVTT(unsigned int clocks)
& ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE))
| APIC_TDR_DIV_16);
- apic_write(APIC_TMICT, clocks/APIC_DIVISOR);
+ if (!oneshot)
+ apic_write(APIC_TMICT, clocks/APIC_DIVISOR);
}
static void setup_APIC_timer(unsigned int clocks)
{
unsigned long flags;
+ int irqen;
local_irq_save(flags);
@@ -805,7 +807,10 @@ static void setup_APIC_timer(unsigned int clocks)
c2 |= inb_p(0x40) << 8;
} while (c2 - c1 < 300);
}
- __setup_APIC_LVTT(clocks);
+
+ irqen = ! cpu_isset(smp_processor_id(),
+ timer_interrupt_broadcast_ipi_mask);
+ __setup_APIC_LVTT(clocks, 0, irqen);
/* Turn off PIT interrupt if we use APIC timer as main timer.
Only works with the PM timer right now
TBD fix it for HPET too. */
@@ -843,8 +848,10 @@ static int __init calibrate_APIC_clock(void)
* Put whatever arbitrary (but long enough) timeout
* value into the APIC clock, we just want to get the
* counter running for calibration.
+ *
+ * No interrupt enable !
*/
- __setup_APIC_LVTT(4000000000);
+ __setup_APIC_LVTT(4000000000, 0, 0);
apic_start = apic_read(APIC_TMCCT);
#ifdef CONFIG_X86_PM_TIMER
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
