mirror of https://gitee.com/openkylin/linux.git
145 lines
3.5 KiB
C
145 lines
3.5 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>
|
|
*
|
|
* hacked by Andi Kleen for x86-64.
|
|
*
|
|
* $Id: hw_irq.h,v 1.24 2001/09/14 20:55:03 vojtech Exp $
|
|
*/
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/config.h>
|
|
#include <asm/atomic.h>
|
|
#include <asm/irq.h>
|
|
#include <linux/profile.h>
|
|
#include <linux/smp.h>
|
|
|
|
struct hw_interrupt_type;
|
|
#endif
|
|
|
|
/*
|
|
* IDT vectors usable for external interrupt sources start
|
|
* at 0x20:
|
|
*/
|
|
#define FIRST_EXTERNAL_VECTOR 0x20
|
|
|
|
#define IA32_SYSCALL_VECTOR 0x80
|
|
|
|
|
|
/*
|
|
* Vectors 0x20-0x2f are used for ISA interrupts.
|
|
*/
|
|
|
|
/*
|
|
* Special IRQ vectors used by the SMP architecture, 0xf0-0xff
|
|
*
|
|
* some of the following vectors are 'rare', they are merged
|
|
* into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
|
|
* TLB, reschedule and local APIC vectors are performance-critical.
|
|
*
|
|
* Vectors 0xf0-0xf9 are free (reserved for future Linux use).
|
|
*/
|
|
#define SPURIOUS_APIC_VECTOR 0xff
|
|
#define ERROR_APIC_VECTOR 0xfe
|
|
#define INVALIDATE_TLB_VECTOR 0xfd
|
|
#define RESCHEDULE_VECTOR 0xfc
|
|
#define TASK_MIGRATION_VECTOR 0xfb
|
|
#define CALL_FUNCTION_VECTOR 0xfa
|
|
#define KDB_VECTOR 0xf9
|
|
|
|
#define THERMAL_APIC_VECTOR 0xf0
|
|
|
|
|
|
/*
|
|
* Local APIC timer IRQ vector is on a different priority level,
|
|
* to work around the 'lost local interrupt if more than 2 IRQ
|
|
* sources per level' errata.
|
|
*/
|
|
#define LOCAL_TIMER_VECTOR 0xef
|
|
|
|
/*
|
|
* First APIC vector available to drivers: (vectors 0x30-0xee)
|
|
* we start at 0x31 to spread out vectors evenly between priority
|
|
* levels. (0x80 is the syscall vector)
|
|
*/
|
|
#define FIRST_DEVICE_VECTOR 0x31
|
|
#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */
|
|
|
|
|
|
#ifndef __ASSEMBLY__
|
|
extern u8 irq_vector[NR_IRQ_VECTORS];
|
|
#define IO_APIC_VECTOR(irq) (irq_vector[irq])
|
|
#define AUTO_ASSIGN -1
|
|
|
|
/*
|
|
* 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 void disable_8259A_irq(unsigned int irq);
|
|
extern void enable_8259A_irq(unsigned int irq);
|
|
extern int i8259A_irq_pending(unsigned int irq);
|
|
extern void make_8259A_irq(unsigned int irq);
|
|
extern void init_8259A(int aeoi);
|
|
extern void FASTCALL(send_IPI_self(int vector));
|
|
extern void init_VISWS_APIC_irqs(void);
|
|
extern void setup_IO_APIC(void);
|
|
extern void disable_IO_APIC(void);
|
|
extern void print_IO_APIC(void);
|
|
extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
|
|
extern void send_IPI(int dest, int vector);
|
|
extern 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))
|
|
|
|
#define __STR(x) #x
|
|
#define STR(x) __STR(x)
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
#define IRQ_NAME2(nr) nr##_interrupt(void)
|
|
#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
|
|
|
|
/*
|
|
* SMP has a few special interrupts for IPI messages
|
|
*/
|
|
|
|
#define BUILD_IRQ(nr) \
|
|
asmlinkage void IRQ_NAME(nr); \
|
|
__asm__( \
|
|
"\n.p2align\n" \
|
|
"IRQ" #nr "_interrupt:\n\t" \
|
|
"push $" #nr "-256 ; " \
|
|
"jmp common_interrupt");
|
|
|
|
#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
|
|
|
|
#define platform_legacy_irq(irq) ((irq) < 16)
|
|
|
|
#endif
|
|
|
|
#endif /* _ASM_HW_IRQ_H */
|