LXR linux/arch/x86/include/asm/hw

   1#ifndef _ASM_X86_HW_IRQ_H
   2#define _ASM_X86_HW_IRQ_H
   3
   4/*
   5 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
   6 *
   7 * moved some of the old arch/i386/kernel/irq.h to here. VY
   8 *
   9 * IRQ/IPI changes taken from work by Thomas Radke
  10 * <tomsoft@informatik.tu-chemnitz.de>
  11 *
  12 * hacked by Andi Kleen for x86-64.
  13 * unified by tglx
  14 */
  15
  16#include <asm/irq_vectors.h>
  17
  18#ifndef __ASSEMBLY__
  19
  20#include <linux/percpu.h>
  21#include <linux/profile.h>
  22#include <linux/smp.h>
  23
  24#include <linux/atomic.h>
  25#include <asm/irq.h>
  26#include <asm/sections.h>
  27
  28/* Interrupt handlers registered during init_IRQ */
  29extern asmlinkage void apic_timer_interrupt(void);
  30extern asmlinkage void x86_platform_ipi(void);
  31extern asmlinkage void kvm_posted_intr_ipi(void);
  32extern asmlinkage void error_interrupt(void);
  33extern asmlinkage void irq_work_interrupt(void);
  34
  35extern asmlinkage void spurious_interrupt(void);
  36extern asmlinkage void thermal_interrupt(void);
  37extern asmlinkage void reschedule_interrupt(void);
  38
  39extern asmlinkage void invalidate_interrupt(void);
  40extern asmlinkage void invalidate_interrupt0(void);
  41extern asmlinkage void invalidate_interrupt1(void);
  42extern asmlinkage void invalidate_interrupt2(void);
  43extern asmlinkage void invalidate_interrupt3(void);
  44extern asmlinkage void invalidate_interrupt4(void);
  45extern asmlinkage void invalidate_interrupt5(void);
  46extern asmlinkage void invalidate_interrupt6(void);
  47extern asmlinkage void invalidate_interrupt7(void);
  48extern asmlinkage void invalidate_interrupt8(void);
  49extern asmlinkage void invalidate_interrupt9(void);
  50extern asmlinkage void invalidate_interrupt10(void);
  51extern asmlinkage void invalidate_interrupt11(void);
  52extern asmlinkage void invalidate_interrupt12(void);
  53extern asmlinkage void invalidate_interrupt13(void);
  54extern asmlinkage void invalidate_interrupt14(void);
  55extern asmlinkage void invalidate_interrupt15(void);
  56extern asmlinkage void invalidate_interrupt16(void);
  57extern asmlinkage void invalidate_interrupt17(void);
  58extern asmlinkage void invalidate_interrupt18(void);
  59extern asmlinkage void invalidate_interrupt19(void);
  60extern asmlinkage void invalidate_interrupt20(void);
  61extern asmlinkage void invalidate_interrupt21(void);
  62extern asmlinkage void invalidate_interrupt22(void);
  63extern asmlinkage void invalidate_interrupt23(void);
  64extern asmlinkage void invalidate_interrupt24(void);
  65extern asmlinkage void invalidate_interrupt25(void);
  66extern asmlinkage void invalidate_interrupt26(void);
  67extern asmlinkage void invalidate_interrupt27(void);
  68extern asmlinkage void invalidate_interrupt28(void);
  69extern asmlinkage void invalidate_interrupt29(void);
  70extern asmlinkage void invalidate_interrupt30(void);
  71extern asmlinkage void invalidate_interrupt31(void);
  72
  73extern asmlinkage void irq_move_cleanup_interrupt(void);
  74extern asmlinkage void reboot_interrupt(void);
  75extern asmlinkage void threshold_interrupt(void);
  76
  77extern asmlinkage void call_function_interrupt(void);
  78extern asmlinkage void call_function_single_interrupt(void);
  79
  80#ifdef CONFIG_TRACING
  81/* Interrupt handlers registered during init_IRQ */
  82extern void trace_apic_timer_interrupt(void);
  83extern void trace_x86_platform_ipi(void);
  84extern void trace_error_interrupt(void);
  85extern void trace_irq_work_interrupt(void);
  86extern void trace_spurious_interrupt(void);
  87extern void trace_thermal_interrupt(void);
  88extern void trace_reschedule_interrupt(void);
  89extern void trace_threshold_interrupt(void);
  90extern void trace_call_function_interrupt(void);
  91extern void trace_call_function_single_interrupt(void);
  92#define trace_irq_move_cleanup_interrupt  irq_move_cleanup_interrupt
  93#define trace_reboot_interrupt  reboot_interrupt
  94#define trace_kvm_posted_intr_ipi kvm_posted_intr_ipi
  95#endif /* CONFIG_TRACING */
  96
  97/* IOAPIC */
  98#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1<<(x)) & io_apic_irqs))
  99extern unsigned long io_apic_irqs;
 100
 101extern void setup_IO_APIC(void);
 102extern void disable_IO_APIC(void);
 103
 104struct io_apic_irq_attr {
 105        int ioapic;
 106        int ioapic_pin;
 107        int trigger;
 108        int polarity;
 109};
 110
 111static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr,
 112                                        int ioapic, int ioapic_pin,
 113                                        int trigger, int polarity)
 114{
 115        irq_attr->ioapic        = ioapic;
 116        irq_attr->ioapic_pin    = ioapic_pin;
 117        irq_attr->trigger       = trigger;
 118        irq_attr->polarity      = polarity;
 119}
 120
 121/* Intel specific interrupt remapping information */
 122struct irq_2_iommu {
 123        struct intel_iommu *iommu;
 124        u16 irte_index;
 125        u16 sub_handle;
 126        u8  irte_mask;
 127};
 128
 129/* AMD specific interrupt remapping information */
 130struct irq_2_irte {
 131        u16 devid; /* Device ID for IRTE table */
 132        u16 index; /* Index into IRTE table*/
 133};
 134
 135/*
 136 * This is performance-critical, we want to do it O(1)
 137 *
 138 * Most irqs are mapped 1:1 with pins.
 139 */
 140struct irq_cfg {
 141        struct irq_pin_list     *irq_2_pin;
 142        cpumask_var_t           domain;
 143        cpumask_var_t           old_domain;
 144        u8                      vector;
 145        u8                      move_in_progress : 1;
 146#ifdef CONFIG_IRQ_REMAP
 147        u8                      remapped : 1;
 148        union {
 149                struct irq_2_iommu irq_2_iommu;
 150                struct irq_2_irte  irq_2_irte;
 151        };
 152#endif
 153};
 154
 155extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
 156extern void send_cleanup_vector(struct irq_cfg *);
 157
 158struct irq_data;
 159int __ioapic_set_affinity(struct irq_data *, const struct cpumask *,
 160                          unsigned int *dest_id);
 161extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr);
 162extern void setup_ioapic_dest(void);
 163
 164extern void enable_IO_APIC(void);
 165
 166/* Statistics */
 167extern atomic_t irq_err_count;
 168extern atomic_t irq_mis_count;
 169
 170/* EISA */
 171extern void eisa_set_level_irq(unsigned int irq);
 172
 173/* SMP */
 174extern __visible void smp_apic_timer_interrupt(struct pt_regs *);
 175extern __visible void smp_spurious_interrupt(struct pt_regs *);
 176extern __visible void smp_x86_platform_ipi(struct pt_regs *);
 177extern __visible void smp_error_interrupt(struct pt_regs *);
 178#ifdef CONFIG_X86_IO_APIC
 179extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
 180#endif
 181#ifdef CONFIG_SMP
 182extern __visible void smp_reschedule_interrupt(struct pt_regs *);
 183extern __visible void smp_call_function_interrupt(struct pt_regs *);
 184extern __visible void smp_call_function_single_interrupt(struct pt_regs *);
 185extern __visible void smp_invalidate_interrupt(struct pt_regs *);
 186#endif
 187
 188extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
 189#ifdef CONFIG_TRACING
 190#define trace_interrupt interrupt
 191#endif
 192
 193#define VECTOR_UNDEFINED        -1
 194#define VECTOR_RETRIGGERED      -2
 195
 196typedef int vector_irq_t[NR_VECTORS];
 197DECLARE_PER_CPU(vector_irq_t, vector_irq);
 198extern void setup_vector_irq(int cpu);
 199
 200#ifdef CONFIG_X86_IO_APIC
 201extern void lock_vector_lock(void);
 202extern void unlock_vector_lock(void);
 203extern void __setup_vector_irq(int cpu);
 204#else
 205static inline void lock_vector_lock(void) {}
 206static inline void unlock_vector_lock(void) {}
 207static inline void __setup_vector_irq(int cpu) {}
 208#endif
 209
 210#endif /* !ASSEMBLY_ */
 211
 212#endif /* _ASM_X86_HW_IRQ_H */
 213