arch/x86/include/asm/hw_irq.h

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