[PATCH] i386: move apic init in init_IRQs
authorEric W. Biederman <ebiederm@xmission.com>
Sun, 30 Oct 2005 22:59:41 +0000 (14:59 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Mon, 31 Oct 2005 01:37:13 +0000 (17:37 -0800)
commitf2b36db692b7ff6972320ad9839ae656a3b0ee3e
tree110387d2557a156d6b9453ea0c45d392b47796c2
parent29b70081f7cb094513d5189e82d3478b50777a28
[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>
arch/i386/kernel/apic.c
arch/i386/kernel/i8259.c
arch/i386/kernel/io_apic.c
arch/i386/kernel/smpboot.c
arch/i386/kernel/time.c
include/asm-i386/apic.h
include/asm-i386/hw_irq.h
include/asm-i386/mach-default/smpboot_hooks.h
include/asm-i386/mach-visws/smpboot_hooks.h
init/main.c