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 /*
  22  * Various low-level irq details needed by irq.c, process.c,
  23  * time.c, io_apic.c and smp.c
  24  *
  25  * Interrupt entry/exit code at both C and assembly level
  26  */
  27
  28 extern u8 irq_vector[NR_IRQ_VECTORS];
  29 #define IO_APIC_VECTOR(irq)     (irq_vector[irq])
  30 #define AUTO_ASSIGN             -1
  31
  32 extern void (*interrupt[NR_IRQS])(void);
  33
  34 #ifdef CONFIG_SMP
  35 fastcall void reschedule_interrupt(void);
  36 fastcall void invalidate_interrupt(void);
  37 fastcall void call_function_interrupt(void);
  38 #endif
  39
  40 #ifdef CONFIG_X86_LOCAL_APIC
  41 fastcall void apic_timer_interrupt(void);
  42 fastcall void error_interrupt(void);
  43 fastcall void spurious_interrupt(void);
  44 fastcall void thermal_interrupt(struct pt_regs *);
  45 #define platform_legacy_irq(irq)        ((irq) < 16)
  46 #endif
  47
  48 void disable_8259A_irq(unsigned int irq);
  49 void enable_8259A_irq(unsigned int irq);
  50 int i8259A_irq_pending(unsigned int irq);
  51 void make_8259A_irq(unsigned int irq);
  52 void init_8259A(int aeoi);
  53 void FASTCALL(send_IPI_self(int vector));
  54 void init_VISWS_APIC_irqs(void);
  55 void setup_IO_APIC(void);
  56 void disable_IO_APIC(void);
  57 void print_IO_APIC(void);
  58 int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
  59 void send_IPI(int dest, int vector);
  60 void setup_ioapic_dest(void);
  61
  62 extern unsigned long io_apic_irqs;
  63
  64 extern atomic_t irq_err_count;
  65 extern atomic_t irq_mis_count;
  66
  67 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
  68
  69 #if defined(CONFIG_X86_IO_APIC)
  70 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i)
  71 {
  72         if (IO_APIC_IRQ(i))
  73                 send_IPI_self(IO_APIC_VECTOR(i));
  74 }
  75 #else
  76 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
  77 #endif
  78
  79 #endif /* _ASM_HW_IRQ_H */