| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| Andrew Morton | d96c4e7 | 2005-09-30 11:58:57 -0700 | [diff] [blame^] | 21 | struct hw_interrupt_type; |
| 22 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |