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 <asm/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 perf_pending_interrupt(void);
  33
  34 extern void spurious_interrupt(void);
  35 extern void thermal_interrupt(void);
  36 extern void reschedule_interrupt(void);
  37 extern void mce_self_interrupt(void);
  38
  39 extern void invalidate_interrupt(void);
  40 extern void invalidate_interrupt0(void);
  41 extern void invalidate_interrupt1(void);
  42 extern void invalidate_interrupt2(void);
  43 extern void invalidate_interrupt3(void);
  44 extern void invalidate_interrupt4(void);
  45 extern void invalidate_interrupt5(void);
  46 extern void invalidate_interrupt6(void);
  47 extern void invalidate_interrupt7(void);
  48
  49 extern void irq_move_cleanup_interrupt(void);
  50 extern void reboot_interrupt(void);
  51 extern void threshold_interrupt(void);
  52
  53 extern void call_function_interrupt(void);
  54 extern void call_function_single_interrupt(void);
  55
  56 /* PIC specific functions */
  57 extern void disable_8259A_irq(unsigned int irq);
  58 extern void enable_8259A_irq(unsigned int irq);
  59 extern int i8259A_irq_pending(unsigned int irq);
  60 extern void make_8259A_irq(unsigned int irq);
  61 extern void init_8259A(int aeoi);
  62
  63 /* IOAPIC */
  64 #define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1<<(x)) & io_apic_irqs))
  65 extern unsigned long io_apic_irqs;
  66
  67 extern void init_VISWS_APIC_irqs(void);
  68 extern void setup_IO_APIC(void);
  69 extern void disable_IO_APIC(void);
  70
  71 struct io_apic_irq_attr {
  72         int ioapic;
  73         int ioapic_pin;
  74         int trigger;
  75         int polarity;
  76 };
  77
  78 static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr,
  79                                         int ioapic, int ioapic_pin,
  80                                         int trigger, int polarity)
  81 {
  82         irq_attr->ioapic        = ioapic;
  83         irq_attr->ioapic_pin    = ioapic_pin;
  84         irq_attr->trigger       = trigger;
  85         irq_attr->polarity      = polarity;
  86 }
  87
  88 /*
  89  * This is performance-critical, we want to do it O(1)
  90  *
  91  * Most irqs are mapped 1:1 with pins.
  92  */
  93 struct irq_cfg {
  94         struct irq_pin_list     *irq_2_pin;
  95         cpumask_var_t           domain;
  96         cpumask_var_t           old_domain;
  97         u8                      vector;
  98         u8                      move_in_progress : 1;
  99 };
 100
 101 extern struct irq_cfg *irq_cfg(unsigned int);
 102 extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
 103 extern void send_cleanup_vector(struct irq_cfg *);
 104
 105 struct irq_desc;
 106 extern unsigned int set_desc_affinity(struct irq_desc *, const struct cpumask *);
 107 extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr);
 108 extern void setup_ioapic_dest(void);
 109
 110 extern void enable_IO_APIC(void);
 111
 112 /* Statistics */
 113 extern atomic_t irq_err_count;
 114 extern atomic_t irq_mis_count;
 115
 116 /* EISA */
 117 extern void eisa_set_level_irq(unsigned int irq);
 118
 119 /* SMP */
 120 extern void smp_apic_timer_interrupt(struct pt_regs *);
 121 extern void smp_spurious_interrupt(struct pt_regs *);
 122 extern void smp_x86_platform_ipi(struct pt_regs *);
 123 extern void smp_error_interrupt(struct pt_regs *);
 124 #ifdef CONFIG_X86_IO_APIC
 125 extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
 126 #endif
 127 #ifdef CONFIG_SMP
 128 extern void smp_reschedule_interrupt(struct pt_regs *);
 129 extern void smp_call_function_interrupt(struct pt_regs *);
 130 extern void smp_call_function_single_interrupt(struct pt_regs *);
 131 #ifdef CONFIG_X86_32
 132 extern void smp_invalidate_interrupt(struct pt_regs *);
 133 #else
 134 extern asmlinkage void smp_invalidate_interrupt(struct pt_regs *);
 135 #endif
 136 #endif
 137
 138 extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
 139
 140 typedef int vector_irq_t[NR_VECTORS];
 141 DECLARE_PER_CPU(vector_irq_t, vector_irq);
 142
 143 #ifdef CONFIG_X86_IO_APIC
 144 extern void lock_vector_lock(void);
 145 extern void unlock_vector_lock(void);
 146 extern void __setup_vector_irq(int cpu);
 147 #else
 148 static inline void lock_vector_lock(void) {}
 149 static inline void unlock_vector_lock(void) {}
 150 static inline void __setup_vector_irq(int cpu) {}
 151 #endif
 152
 153 #endif /* !ASSEMBLY_ */
 154
 155 #endif /* _ASM_X86_HW_IRQ_H */