[PATCH] i386: move apic init in init_IRQs
All kinds of ugliness exists because we don't initialize
the apics during init_IRQs.
- We calibrate jiffies in non apic mode even when we are using apics.
- We have to have special code to initialize the apics when non-smp.
- The legacy i8259 must exist and be setup correctly, even
when we won't use it past initialization.
- The kexec on panic code must restore the state of the io_apics.
- init/main.c needs a special case for !smp smp_init on x86
In addition to pure code movement I needed a couple
of non-obvious changes:
- Move setup_boot_APIC_clock into APIC_late_time_init for
simplicity.
- Use cpu_khz to generate a better approximation of loops_per_jiffies
so I can verify the timer interrupt is working.
- Call setup_apic_nmi_watchdog again after cpu_khz is initialized on
the boot cpu.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/i386/kernel/time.c b/arch/i386/kernel/time.c
index 2883a4d..46c35ec 100644
--- a/arch/i386/kernel/time.c
+++ b/arch/i386/kernel/time.c
@@ -444,8 +444,8 @@
device_initcall(time_init_device);
-#ifdef CONFIG_HPET_TIMER
extern void (*late_time_init)(void);
+#ifdef CONFIG_HPET_TIMER
/* Duplicate of time_init() below, with hpet_enable part added */
static void __init hpet_time_init(void)
{
@@ -462,6 +462,11 @@
printk(KERN_INFO "Using %s for high-res timesource\n",cur_timer->name);
time_init_hook();
+
+#ifdef CONFIG_X86_LOCAL_APIC
+ if (enable_local_apic >= 0)
+ APIC_late_time_init();
+#endif
}
#endif
@@ -486,4 +491,9 @@
printk(KERN_INFO "Using %s for high-res timesource\n",cur_timer->name);
time_init_hook();
+
+#ifdef CONFIG_X86_LOCAL_APIC
+ if (enable_local_apic >= 0)
+ late_time_init = APIC_late_time_init;
+#endif
}