5 * linux/include/asm/hw_irq.h
7 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
9 * moved some of the old arch/i386/kernel/irq.h to here. VY
11 * IRQ/IPI changes taken from work by Thomas Radke
12 * <tomsoft@informatik.tu-chemnitz.de>
15 #include <linux/config.h>
16 #include <linux/profile.h>
17 #include <asm/atomic.h>
19 #include <asm/sections.h>
22 * Various low-level irq details needed by irq.c, process.c,
23 * time.c, io_apic.c and smp.c
25 * Interrupt entry/exit code at both C and assembly level
28 extern u8 irq_vector[NR_IRQ_VECTORS];
29 #define IO_APIC_VECTOR(irq) (irq_vector[irq])
30 #define AUTO_ASSIGN -1
32 extern void (*interrupt[NR_IRQS])(void);
35 fastcall void reschedule_interrupt(void);
36 fastcall void invalidate_interrupt(void);
37 fastcall void call_function_interrupt(void);
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)
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);
62 extern unsigned long io_apic_irqs;
64 extern atomic_t irq_err_count;
65 extern atomic_t irq_mis_count;
67 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
69 #if defined(CONFIG_X86_IO_APIC)
70 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i)
73 send_IPI_self(IO_APIC_VECTOR(i));
76 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
79 #endif /* _ASM_HW_IRQ_H */