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      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 (at) informatik.tu-chemnitz.de>
     13  */
     14 
     15 #include <linux/profile.h>
     16 #include <asm/atomic.h>
     17 #include <asm/irq.h>
     18 #include <asm/sections.h>
     19 
     20 #define NMI_VECTOR		0x02
     21 
     22 /*
     23  * Various low-level irq details needed by irq.c, process.c,
     24  * time.c, io_apic.c and smp.c
     25  *
     26  * Interrupt entry/exit code at both C and assembly level
     27  */
     28 
     29 extern void (*interrupt[NR_IRQS])(void);
     30 
     31 #ifdef CONFIG_SMP
     32 fastcall void reschedule_interrupt(void);
     33 fastcall void invalidate_interrupt(void);
     34 fastcall void call_function_interrupt(void);
     35 #endif
     36 
     37 #ifdef CONFIG_X86_LOCAL_APIC
     38 fastcall void apic_timer_interrupt(void);
     39 fastcall void error_interrupt(void);
     40 fastcall void spurious_interrupt(void);
     41 fastcall void thermal_interrupt(void);
     42 #define platform_legacy_irq(irq)	((irq) < 16)
     43 #endif
     44 
     45 void disable_8259A_irq(unsigned int irq);
     46 void enable_8259A_irq(unsigned int irq);
     47 int i8259A_irq_pending(unsigned int irq);
     48 void make_8259A_irq(unsigned int irq);
     49 void init_8259A(int aeoi);
     50 void FASTCALL(send_IPI_self(int vector));
     51 void init_VISWS_APIC_irqs(void);
     52 void setup_IO_APIC(void);
     53 void disable_IO_APIC(void);
     54 void print_IO_APIC(void);
     55 int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
     56 void send_IPI(int dest, int vector);
     57 void setup_ioapic_dest(void);
     58 
     59 extern unsigned long io_apic_irqs;
     60 
     61 extern atomic_t irq_err_count;
     62 extern atomic_t irq_mis_count;
     63 
     64 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
     65 
     66 #endif /* _ASM_HW_IRQ_H */
     67