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 void apic_timer_interrupt(void);
  30extern void x86_platform_ipi(void);
  31extern void error_interrupt(void);
  32extern void irq_work_interrupt(void);
  33
  34extern void spurious_interrupt(void);
  35extern void thermal_interrupt(void);
  36extern void reschedule_interrupt(void);
  37
  38extern void invalidate_interrupt(void);
  39extern void invalidate_interrupt0(void);
  40extern void invalidate_interrupt1(void);
  41extern void invalidate_interrupt2(void);
  42extern void invalidate_interrupt3(void);
  43extern void invalidate_interrupt4(void);
  44extern void invalidate_interrupt5(void);
  45extern void invalidate_interrupt6(void);
  46extern void invalidate_interrupt7(void);
  47extern void invalidate_interrupt8(void);
  48extern void invalidate_interrupt9(void);
  49extern void invalidate_interrupt10(void);
  50extern void invalidate_interrupt11(void);
  51extern void invalidate_interrupt12(void);
  52extern void invalidate_interrupt13(void);
  53extern void invalidate_interrupt14(void);
  54extern void invalidate_interrupt15(void);
  55extern void invalidate_interrupt16(void);
  56extern void invalidate_interrupt17(void);
  57extern void invalidate_interrupt18(void);
  58extern void invalidate_interrupt19(void);
  59extern void invalidate_interrupt20(void);
  60extern void invalidate_interrupt21(void);
  61extern void invalidate_interrupt22(void);
  62extern void invalidate_interrupt23(void);
  63extern void invalidate_interrupt24(void);
  64extern void invalidate_interrupt25(void);
  65extern void invalidate_interrupt26(void);
  66extern void invalidate_interrupt27(void);
  67extern void invalidate_interrupt28(void);
  68extern void invalidate_interrupt29(void);
  69extern void invalidate_interrupt30(void);
  70extern void invalidate_interrupt31(void);
  71
  72extern void irq_move_cleanup_interrupt(void);
  73extern void reboot_interrupt(void);
  74extern void threshold_interrupt(void);
  75
  76extern void call_function_interrupt(void);
  77extern void call_function_single_interrupt(void);
  78
  79/* IOAPIC */
  80#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1<<(x)) & io_apic_irqs))
  81extern unsigned long io_apic_irqs;
  82
  83extern void init_VISWS_APIC_irqs(void);
  84extern void setup_IO_APIC(void);
  85extern void disable_IO_APIC(void);
  86
  87struct io_apic_irq_attr {
  88        int ioapic;
  89        int ioapic_pin;
  90        int trigger;
  91        int polarity;
  92};
  93
  94static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr,
  95                                        int ioapic, int ioapic_pin,
  96                                        int trigger, int polarity)
  97{
  98        irq_attr->ioapic        = ioapic;
  99        irq_attr->ioapic_pin    = ioapic_pin;
 100        irq_attr->trigger       = trigger;
 101        irq_attr->polarity      = polarity;
 102}
 103
 104struct irq_2_iommu {
 105        struct intel_iommu *iommu;
 106        u16 irte_index;
 107        u16 sub_handle;
 108        u8  irte_mask;
 109};
 110
 111/*
 112 * This is performance-critical, we want to do it O(1)
 113 *
 114 * Most irqs are mapped 1:1 with pins.
 115 */
 116struct irq_cfg {
 117        struct irq_pin_list     *irq_2_pin;
 118        cpumask_var_t           domain;
 119        cpumask_var_t           old_domain;
 120        u8                      vector;
 121        u8                      move_in_progress : 1;
 122#ifdef CONFIG_IRQ_REMAP
 123        struct irq_2_iommu      irq_2_iommu;
 124#endif
 125};
 126
 127extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
 128extern void send_cleanup_vector(struct irq_cfg *);
 129
 130struct irq_data;
 131int __ioapic_set_affinity(struct irq_data *, const struct cpumask *,
 132                          unsigned int *dest_id);
 133extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr);
 134extern void setup_ioapic_dest(void);
 135
 136extern void enable_IO_APIC(void);
 137
 138/* Statistics */
 139extern atomic_t irq_err_count;
 140extern atomic_t irq_mis_count;
 141
 142/* EISA */
 143extern void eisa_set_level_irq(unsigned int irq);
 144
 145/* SMP */
 146extern void smp_apic_timer_interrupt(struct pt_regs *);
 147extern void smp_spurious_interrupt(struct pt_regs *);
 148extern void smp_x86_platform_ipi(struct pt_regs *);
 149extern void smp_error_interrupt(struct pt_regs *);
 150#ifdef CONFIG_X86_IO_APIC
 151extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
 152#endif
 153#ifdef CONFIG_SMP
 154extern void smp_reschedule_interrupt(struct pt_regs *);
 155extern void smp_call_function_interrupt(struct pt_regs *);
 156extern void smp_call_function_single_interrupt(struct pt_regs *);
 157#ifdef CONFIG_X86_32
 158extern void smp_invalidate_interrupt(struct pt_regs *);
 159#else
 160extern asmlinkage void smp_invalidate_interrupt(struct pt_regs *);
 161#endif
 162#endif
 163
 164extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
 165
 166typedef int vector_irq_t[NR_VECTORS];
 167DECLARE_PER_CPU(vector_irq_t, vector_irq);
 168extern void setup_vector_irq(int cpu);
 169
 170#ifdef CONFIG_X86_IO_APIC
 171extern void lock_vector_lock(void);
 172extern void unlock_vector_lock(void);
 173extern void __setup_vector_irq(int cpu);
 174#else
 175static inline void lock_vector_lock(void) {}
 176static inline void unlock_vector_lock(void) {}
 177static inline void __setup_vector_irq(int cpu) {}
 178#endif
 179
 180#endif /* !ASSEMBLY_ */
 181
 182#endif /* _ASM_X86_HW_IRQ_H */
 183