kernel-ark/include/asm-i386/hw_irq.h
Keith Owens 45486f81c9 [PATCH] x86_64: Standardize i386/x86_64 handling of NMI_VECTOR
x86_64 and i386 behave inconsistently when sending an IPI on vector 2
(NMI_VECTOR).  Make both behave the same, so IPI 2 is sent as NMI.

The crash code was abusing send_IPI_allbutself() by passing a code
instead of a vector, it only worked because crash knew about the
internal code of send_IPI_allbutself().  Change crash to use NMI_VECTOR
instead, and remove the comment about how crash was abusing the function.

This patch is a pre-requisite for fixing the problem where sending an
IPI as NMI would reboot some Dell Xeon systems.  I cannot fix that
problem while crash continus to abuse send_IPI_allbutself().

It also removes the inconsistency between i386 and x86_64 for
NMI_VECTOR.  That will simplify all the RAS code that needs to bring
all the cpus to a clean stop, even when one or more cpus are spinning
disabled.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 10:48:22 -07:00

83 lines
2.1 KiB
C

#ifndef _ASM_HW_IRQ_H
#define _ASM_HW_IRQ_H
/*
* linux/include/asm/hw_irq.h
*
* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
*
* moved some of the old arch/i386/kernel/irq.h to here. VY
*
* IRQ/IPI changes taken from work by Thomas Radke
* <tomsoft@informatik.tu-chemnitz.de>
*/
#include <linux/profile.h>
#include <asm/atomic.h>
#include <asm/irq.h>
#include <asm/sections.h>
struct hw_interrupt_type;
#define NMI_VECTOR 0x02
/*
* Various low-level irq details needed by irq.c, process.c,
* time.c, io_apic.c and smp.c
*
* Interrupt entry/exit code at both C and assembly level
*/
extern u8 irq_vector[NR_IRQ_VECTORS];
#define IO_APIC_VECTOR(irq) (irq_vector[irq])
#define AUTO_ASSIGN -1
extern void (*interrupt[NR_IRQS])(void);
#ifdef CONFIG_SMP
fastcall void reschedule_interrupt(void);
fastcall void invalidate_interrupt(void);
fastcall void call_function_interrupt(void);
#endif
#ifdef CONFIG_X86_LOCAL_APIC
fastcall void apic_timer_interrupt(void);
fastcall void error_interrupt(void);
fastcall void spurious_interrupt(void);
fastcall void thermal_interrupt(struct pt_regs *);
#define platform_legacy_irq(irq) ((irq) < 16)
#endif
void disable_8259A_irq(unsigned int irq);
void enable_8259A_irq(unsigned int irq);
int i8259A_irq_pending(unsigned int irq);
void make_8259A_irq(unsigned int irq);
void init_8259A(int aeoi);
void FASTCALL(send_IPI_self(int vector));
void init_VISWS_APIC_irqs(void);
void setup_IO_APIC(void);
void disable_IO_APIC(void);
void print_IO_APIC(void);
int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
void send_IPI(int dest, int vector);
void setup_ioapic_dest(void);
extern unsigned long io_apic_irqs;
extern atomic_t irq_err_count;
extern atomic_t irq_mis_count;
#define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
#if defined(CONFIG_X86_IO_APIC)
static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i)
{
if (IO_APIC_IRQ(i))
send_IPI_self(IO_APIC_VECTOR(i));
}
#else
static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
#endif
#endif /* _ASM_HW_IRQ_H */