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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _ASM_HW_IRQ_H |
| 2 | #define _ASM_HW_IRQ_H |
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| 3 | |||
| 4 | /* |
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| 5 | * linux/include/asm/hw_irq.h |
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| 6 | * |
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| 7 | * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar |
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| 8 | * |
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| 9 | * moved some of the old arch/i386/kernel/irq.h to here. VY |
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| 10 | * |
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| 11 | * IRQ/IPI changes taken from work by Thomas Radke |
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| 12 | * <tomsoft@informatik.tu-chemnitz.de> |
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| 13 | */ |
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| 14 | |||
| 15 | #include <linux/config.h> |
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| 16 | #include <linux/profile.h> |
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| 17 | #include <asm/atomic.h> |
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| 18 | #include <asm/irq.h> |
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| 19 | #include <asm/sections.h> |
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| 20 | |||
| 21 | /* |
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| 22 | * Various low-level irq details needed by irq.c, process.c, |
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| 23 | * time.c, io_apic.c and smp.c |
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| 24 | * |
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| 25 | * Interrupt entry/exit code at both C and assembly level |
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| 26 | */ |
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| 27 | |||
| 28 | extern u8 irq_vector[NR_IRQ_VECTORS]; |
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| 29 | #define IO_APIC_VECTOR(irq) ((int)irq_vector[irq]) |
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| 30 | |||
| 31 | extern void (*interrupt[NR_IRQS])(void); |
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| 32 | |||
| 33 | #ifdef CONFIG_SMP |
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| 34 | asmlinkage void reschedule_interrupt(void); |
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| 35 | asmlinkage void invalidate_interrupt(void); |
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| 36 | asmlinkage void call_function_interrupt(void); |
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| 37 | #endif |
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| 38 | |||
| 39 | #ifdef CONFIG_X86_LOCAL_APIC |
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| 40 | asmlinkage void apic_timer_interrupt(void); |
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| 41 | asmlinkage void error_interrupt(void); |
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| 42 | asmlinkage void spurious_interrupt(void); |
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| 43 | asmlinkage void thermal_interrupt(struct pt_regs); |
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| 44 | #endif |
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| 45 | |||
| 46 | void mask_irq(unsigned int irq); |
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| 47 | void unmask_irq(unsigned int irq); |
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| 48 | void disable_8259A_irq(unsigned int irq); |
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| 49 | void enable_8259A_irq(unsigned int irq); |
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| 50 | int i8259A_irq_pending(unsigned int irq); |
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| 51 | void make_8259A_irq(unsigned int irq); |
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| 52 | void init_8259A(int aeoi); |
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| 53 | void FASTCALL(send_IPI_self(int vector)); |
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| 54 | void init_VISWS_APIC_irqs(void); |
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| 55 | void setup_IO_APIC(void); |
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| 56 | void disable_IO_APIC(void); |
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| 57 | void print_IO_APIC(void); |
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| 58 | int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn); |
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| 59 | void send_IPI(int dest, int vector); |
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| 60 | void setup_ioapic_dest(cpumask_t mask); |
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| 61 | |||
| 62 | extern unsigned long io_apic_irqs; |
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| 63 | |||
| 64 | extern atomic_t irq_err_count; |
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| 65 | extern atomic_t irq_mis_count; |
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| 66 | |||
| 67 | #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs)) |
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| 68 | |||
| 69 | /* |
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| 70 | * The profiling function is SMP safe. (nothing can mess |
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| 71 | * around with "current", and the profiling counters are |
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| 72 | * updated with atomic operations). This is especially |
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| 73 | * useful with a profiling multiplier != 1 |
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| 74 | */ |
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| 75 | static inline void x86_do_profile(struct pt_regs * regs) |
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| 76 | { |
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| 77 | unsigned long eip; |
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| 78 | extern unsigned long prof_cpu_mask; |
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| 79 | |||
| 80 | profile_hook(regs); |
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| 81 | |||
| 82 | if (user_mode(regs)) |
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| 83 | return; |
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| 84 | |||
| 85 | if (!prof_buffer) |
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| 86 | return; |
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| 87 | |||
| 88 | eip = regs->eip; |
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| 89 | |||
| 90 | /* |
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| 91 | * Only measure the CPUs specified by /proc/irq/prof_cpu_mask. |
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| 92 | * (default is all CPUs.) |
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| 93 | */ |
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| 94 | if (!((1<<smp_processor_id()) & prof_cpu_mask)) |
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| 95 | return; |
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| 96 | |||
| 97 | eip -= (unsigned long)_stext; |
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| 98 | eip >>= prof_shift; |
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| 99 | /* |
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| 100 | * Don't ignore out-of-bounds EIP values silently, |
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| 101 | * put them into the last histogram slot, so if |
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| 102 | * present, they will show up as a sharp peak. |
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| 103 | */ |
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| 104 | if (eip > prof_len-1) |
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| 105 | eip = prof_len-1; |
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| 106 | atomic_inc((atomic_t *)&prof_buffer[eip]); |
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| 107 | } |
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| 108 | |||
| 109 | #if defined(CONFIG_X86_IO_APIC) |
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| 110 | static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) |
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| 111 | { |
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| 112 | if (IO_APIC_IRQ(i)) |
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| 113 | send_IPI_self(IO_APIC_VECTOR(i)); |
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| 114 | } |
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| 115 | #else |
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| 116 | static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {} |
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| 117 | #endif |
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| 118 | |||
| 119 | #endif /* _ASM_HW_IRQ_H */ |