include/asm-i386/hw_irq.h

   1 #ifndef _ASM_HW_IRQ_H
   2 #define _ASM_HW_IRQ_H
   3
   4 /*
   5  *      linux/include/asm/hw_irq.h
   6  *
   7  *      (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
   8  *
   9  *      moved some of the old arch/i386/kernel/irq.h to here. VY
  10  *
  11  *      IRQ/IPI changes taken from work by Thomas Radke
  12  *      <tomsoft@informatik.tu-chemnitz.de>
  13  */
  14
  15 #include <linux/config.h>
  16 #include <linux/profile.h>
  17 #include <asm/atomic.h>
  18 #include <asm/irq.h>
  19 #include <asm/sections.h>
  20
  21 struct hw_interrupt_type;
  22
  23 /*
  24  * Various low-level irq details needed by irq.c, process.c,
  25  * time.c, io_apic.c and smp.c
  26  *
  27  * Interrupt entry/exit code at both C and assembly level
  28  */
  29
  30 extern u8 irq_vector[NR_IRQ_VECTORS];
  31 #define IO_APIC_VECTOR(irq)     (irq_vector[irq])
  32 #define AUTO_ASSIGN             -1
  33
  34 extern void (*interrupt[NR_IRQS])(void);
  35
  36 #ifdef CONFIG_SMP
  37 fastcall void reschedule_interrupt(void);
  38 fastcall void invalidate_interrupt(void);
  39 fastcall void call_function_interrupt(void);
  40 #endif
  41
  42 #ifdef CONFIG_X86_LOCAL_APIC
  43 fastcall void apic_timer_interrupt(void);
  44 fastcall void error_interrupt(void);
  45 fastcall void spurious_interrupt(void);
  46 fastcall void thermal_interrupt(struct pt_regs *);
  47 #define platform_legacy_irq(irq)        ((irq) < 16)
  48 #endif
  49
  50 void disable_8259A_irq(unsigned int irq);
  51 void enable_8259A_irq(unsigned int irq);
  52 int i8259A_irq_pending(unsigned int irq);
  53 void make_8259A_irq(unsigned int irq);
  54 void init_8259A(int aeoi);
  55 void FASTCALL(send_IPI_self(int vector));
  56 void init_VISWS_APIC_irqs(void);
  57 void setup_IO_APIC(void);
  58 void disable_IO_APIC(void);
  59 void print_IO_APIC(void);
  60 int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
  61 void send_IPI(int dest, int vector);
  62 void setup_ioapic_dest(void);
  63
  64 extern unsigned long io_apic_irqs;
  65
  66 extern atomic_t irq_err_count;
  67 extern atomic_t irq_mis_count;
  68
  69 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
  70
  71 #if defined(CONFIG_X86_IO_APIC)
  72 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i)
  73 {
  74         if (IO_APIC_IRQ(i))
  75                 send_IPI_self(IO_APIC_VECTOR(i));
  76 }
  77 #else
  78 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
  79 #endif
  80
  81 #endif /* _ASM_HW_IRQ_H */