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authorEric W. Biederman <ebiederm@xmission.com>2005-10-30 14:59:41 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-30 17:37:13 -0800
commitf2b36db692b7ff6972320ad9839ae656a3b0ee3e (patch)
tree110387d2557a156d6b9453ea0c45d392b47796c2 /include
parent29b70081f7cb094513d5189e82d3478b50777a28 (diff)
downloadlinux-f2b36db692b7ff6972320ad9839ae656a3b0ee3e.tar.bz2
[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>
Diffstat (limited to 'include')
-rw-r--r--include/asm-i386/apic.h3
-rw-r--r--include/asm-i386/hw_irq.h1
-rw-r--r--include/asm-i386/mach-default/smpboot_hooks.h15
-rw-r--r--include/asm-i386/mach-visws/smpboot_hooks.h7
4 files changed, 3 insertions, 23 deletions
diff --git a/include/asm-i386/apic.h b/include/asm-i386/apic.h
index 8c454aa58ac6..a515e2aed829 100644
--- a/include/asm-i386/apic.h
+++ b/include/asm-i386/apic.h
@@ -118,7 +118,8 @@ extern void release_lapic_nmi(void);
extern void disable_timer_nmi_watchdog(void);
extern void enable_timer_nmi_watchdog(void);
extern void nmi_watchdog_tick (struct pt_regs * regs);
-extern int APIC_init_uniprocessor (void);
+extern int APIC_init(void);
+extern void APIC_late_time_init(void);
extern void disable_APIC_timer(void);
extern void enable_APIC_timer(void);
diff --git a/include/asm-i386/hw_irq.h b/include/asm-i386/hw_irq.h
index 622815bf3243..9139b89497a1 100644
--- a/include/asm-i386/hw_irq.h
+++ b/include/asm-i386/hw_irq.h
@@ -55,6 +55,7 @@ void init_8259A(int aeoi);
void FASTCALL(send_IPI_self(int vector));
void init_VISWS_APIC_irqs(void);
void setup_IO_APIC(void);
+void IO_APIC_late_time_init(void);
void disable_IO_APIC(void);
void print_IO_APIC(void);
int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
diff --git a/include/asm-i386/mach-default/smpboot_hooks.h b/include/asm-i386/mach-default/smpboot_hooks.h
index 7f45f6311059..d7c70c144f9f 100644
--- a/include/asm-i386/mach-default/smpboot_hooks.h
+++ b/include/asm-i386/mach-default/smpboot_hooks.h
@@ -1,11 +1,6 @@
/* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
* which needs to alter them. */
-static inline void smpboot_clear_io_apic_irqs(void)
-{
- io_apic_irqs = 0;
-}
-
static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
{
CMOS_WRITE(0xa, 0xf);
@@ -32,13 +27,3 @@ static inline void smpboot_restore_warm_reset_vector(void)
*((volatile long *) phys_to_virt(0x467)) = 0;
}
-
-static inline void smpboot_setup_io_apic(void)
-{
- /*
- * Here we can be sure that there is an IO-APIC in the system. Let's
- * go and set it up:
- */
- if (!skip_ioapic_setup && nr_ioapics)
- setup_IO_APIC();
-}
diff --git a/include/asm-i386/mach-visws/smpboot_hooks.h b/include/asm-i386/mach-visws/smpboot_hooks.h
index d926471fa359..14d8e0375f7a 100644
--- a/include/asm-i386/mach-visws/smpboot_hooks.h
+++ b/include/asm-i386/mach-visws/smpboot_hooks.h
@@ -11,14 +11,7 @@ static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
/* for visws do nothing for any of these */
-static inline void smpboot_clear_io_apic_irqs(void)
-{
-}
-
static inline void smpboot_restore_warm_reset_vector(void)
{
}
-static inline void smpboot_setup_io_apic(void)
-{
-}