include/asm-x86_64/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  *      hacked by Andi Kleen for x86-64.
  15  */
  16
  17 #ifndef __ASSEMBLY__
  18 #include <asm/atomic.h>
  19 #include <asm/irq.h>
  20 #include <linux/profile.h>
  21 #include <linux/smp.h>
  22 #endif
  23
  24 #define NMI_VECTOR              0x02
  25 /*
  26  * IDT vectors usable for external interrupt sources start
  27  * at 0x20:
  28  */
  29 #define FIRST_EXTERNAL_VECTOR   0x20
  30
  31 #define IA32_SYSCALL_VECTOR     0x80
  32
  33
  34 /*
  35  * Vectors 0x20-0x2f are used for ISA interrupts.
  36  */
  37
  38 /*
  39  * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
  40  *
  41  *  some of the following vectors are 'rare', they are merged
  42  *  into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
  43  *  TLB, reschedule and local APIC vectors are performance-critical.
  44  */
  45 #define SPURIOUS_APIC_VECTOR    0xff
  46 #define ERROR_APIC_VECTOR       0xfe
  47 #define RESCHEDULE_VECTOR       0xfd
  48 #define CALL_FUNCTION_VECTOR    0xfc
  49 /* fb free - please don't readd KDB here because it's useless
  50    (hint - think what a NMI bit does to a vector) */
  51 #define THERMAL_APIC_VECTOR     0xfa
  52 #define THRESHOLD_APIC_VECTOR   0xf9
  53 /* f8 free */
  54 #define INVALIDATE_TLB_VECTOR_END       0xf7
  55 #define INVALIDATE_TLB_VECTOR_START     0xf0    /* f0-f7 used for TLB flush */
  56
  57 #define NUM_INVALIDATE_TLB_VECTORS      8
  58
  59 /*
  60  * Local APIC timer IRQ vector is on a different priority level,
  61  * to work around the 'lost local interrupt if more than 2 IRQ
  62  * sources per level' errata.
  63  */
  64 #define LOCAL_TIMER_VECTOR      0xef
  65
  66 /*
  67  * First APIC vector available to drivers: (vectors 0x30-0xee)
  68  * we start at 0x31 to spread out vectors evenly between priority
  69  * levels. (0x80 is the syscall vector)
  70  */
  71 #define FIRST_DEVICE_VECTOR     0x31
  72 #define FIRST_SYSTEM_VECTOR     0xef   /* duplicated in irq.h */
  73
  74
  75 #ifndef __ASSEMBLY__
  76 extern u8 irq_vector[NR_IRQ_VECTORS];
  77 extern int vector_irq[NR_VECTORS];
  78 #define IO_APIC_VECTOR(irq)     (irq_vector[irq])
  79
  80 /*
  81  * Various low-level irq details needed by irq.c, process.c,
  82  * time.c, io_apic.c and smp.c
  83  *
  84  * Interrupt entry/exit code at both C and assembly level
  85  */
  86
  87 extern void disable_8259A_irq(unsigned int irq);
  88 extern void enable_8259A_irq(unsigned int irq);
  89 extern int i8259A_irq_pending(unsigned int irq);
  90 extern void make_8259A_irq(unsigned int irq);
  91 extern void init_8259A(int aeoi);
  92 extern void FASTCALL(send_IPI_self(int vector));
  93 extern void init_VISWS_APIC_irqs(void);
  94 extern void setup_IO_APIC(void);
  95 extern void disable_IO_APIC(void);
  96 extern void print_IO_APIC(void);
  97 extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
  98 extern void send_IPI(int dest, int vector);
  99 extern void setup_ioapic_dest(void);
 100
 101 extern unsigned long io_apic_irqs;
 102
 103 extern atomic_t irq_err_count;
 104 extern atomic_t irq_mis_count;
 105
 106 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
 107
 108 #define __STR(x) #x
 109 #define STR(x) __STR(x)
 110
 111 #include <asm/ptrace.h>
 112
 113 #define IRQ_NAME2(nr) nr##_interrupt(void)
 114 #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
 115
 116 /*
 117  *      SMP has a few special interrupts for IPI messages
 118  */
 119
 120 #define BUILD_IRQ(nr) \
 121 asmlinkage void IRQ_NAME(nr); \
 122 __asm__( \
 123 "\n.p2align\n" \
 124 "IRQ" #nr "_interrupt:\n\t" \
 125         "push $~(" #nr ") ; " \
 126         "jmp common_interrupt");
 127
 128 #define platform_legacy_irq(irq)        ((irq) < 16)
 129
 130 #endif
 131
 132 #endif /* _ASM_HW_IRQ_H */