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 #include <linux/percpu.h>
  23 #endif
  24
  25 #define NMI_VECTOR              0x02
  26 /*
  27  * IDT vectors usable for external interrupt sources start
  28  * at 0x20:
  29  */
  30 #define FIRST_EXTERNAL_VECTOR   0x20
  31
  32 #define IA32_SYSCALL_VECTOR     0x80
  33
  34
  35 /* Reserve the lowest usable priority level 0x20 - 0x2f for triggering
  36  * cleanup after irq migration.
  37  */
  38 #define IRQ_MOVE_CLEANUP_VECTOR FIRST_EXTERNAL_VECTOR
  39
  40 /*
  41  * Vectors 0x30-0x3f are used for ISA interrupts.
  42  */
  43 #define IRQ0_VECTOR             FIRST_EXTERNAL_VECTOR + 0x10
  44 #define IRQ1_VECTOR             IRQ0_VECTOR + 1
  45 #define IRQ2_VECTOR             IRQ0_VECTOR + 2
  46 #define IRQ3_VECTOR             IRQ0_VECTOR + 3
  47 #define IRQ4_VECTOR             IRQ0_VECTOR + 4
  48 #define IRQ5_VECTOR             IRQ0_VECTOR + 5
  49 #define IRQ6_VECTOR             IRQ0_VECTOR + 6
  50 #define IRQ7_VECTOR             IRQ0_VECTOR + 7
  51 #define IRQ8_VECTOR             IRQ0_VECTOR + 8
  52 #define IRQ9_VECTOR             IRQ0_VECTOR + 9
  53 #define IRQ10_VECTOR            IRQ0_VECTOR + 10
  54 #define IRQ11_VECTOR            IRQ0_VECTOR + 11
  55 #define IRQ12_VECTOR            IRQ0_VECTOR + 12
  56 #define IRQ13_VECTOR            IRQ0_VECTOR + 13
  57 #define IRQ14_VECTOR            IRQ0_VECTOR + 14
  58 #define IRQ15_VECTOR            IRQ0_VECTOR + 15
  59
  60 /*
  61  * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
  62  *
  63  *  some of the following vectors are 'rare', they are merged
  64  *  into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
  65  *  TLB, reschedule and local APIC vectors are performance-critical.
  66  */
  67 #define SPURIOUS_APIC_VECTOR    0xff
  68 #define ERROR_APIC_VECTOR       0xfe
  69 #define RESCHEDULE_VECTOR       0xfd
  70 #define CALL_FUNCTION_VECTOR    0xfc
  71 /* fb free - please don't readd KDB here because it's useless
  72    (hint - think what a NMI bit does to a vector) */
  73 #define THERMAL_APIC_VECTOR     0xfa
  74 #define THRESHOLD_APIC_VECTOR   0xf9
  75 /* f8 free */
  76 #define INVALIDATE_TLB_VECTOR_END       0xf7
  77 #define INVALIDATE_TLB_VECTOR_START     0xf0    /* f0-f7 used for TLB flush */
  78
  79 #define NUM_INVALIDATE_TLB_VECTORS      8
  80
  81 /*
  82  * Local APIC timer IRQ vector is on a different priority level,
  83  * to work around the 'lost local interrupt if more than 2 IRQ
  84  * sources per level' errata.
  85  */
  86 #define LOCAL_TIMER_VECTOR      0xef
  87
  88 /*
  89  * First APIC vector available to drivers: (vectors 0x30-0xee)
  90  * we start at 0x41 to spread out vectors evenly between priority
  91  * levels. (0x80 is the syscall vector)
  92  */
  93 #define FIRST_DEVICE_VECTOR     (IRQ15_VECTOR + 2)
  94 #define FIRST_SYSTEM_VECTOR     0xef   /* duplicated in irq.h */
  95
  96
  97 #ifndef __ASSEMBLY__
  98 typedef int vector_irq_t[NR_VECTORS];
  99 DECLARE_PER_CPU(vector_irq_t, vector_irq);
 100 extern void __setup_vector_irq(int cpu);
 101 extern spinlock_t vector_lock;
 102
 103 /*
 104  * Various low-level irq details needed by irq.c, process.c,
 105  * time.c, io_apic.c and smp.c
 106  *
 107  * Interrupt entry/exit code at both C and assembly level
 108  */
 109
 110 extern void disable_8259A_irq(unsigned int irq);
 111 extern void enable_8259A_irq(unsigned int irq);
 112 extern int i8259A_irq_pending(unsigned int irq);
 113 extern void make_8259A_irq(unsigned int irq);
 114 extern void init_8259A(int aeoi);
 115 extern void send_IPI_self(int vector);
 116 extern void init_VISWS_APIC_irqs(void);
 117 extern void setup_IO_APIC(void);
 118 extern void disable_IO_APIC(void);
 119 extern void print_IO_APIC(void);
 120 extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
 121 extern void send_IPI(int dest, int vector);
 122 extern void setup_ioapic_dest(void);
 123
 124 extern unsigned long io_apic_irqs;
 125
 126 extern atomic_t irq_err_count;
 127 extern atomic_t irq_mis_count;
 128
 129 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
 130
 131 #define __STR(x) #x
 132 #define STR(x) __STR(x)
 133
 134 #include <asm/ptrace.h>
 135
 136 #define IRQ_NAME2(nr) nr##_interrupt(void)
 137 #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
 138
 139 /*
 140  *      SMP has a few special interrupts for IPI messages
 141  */
 142
 143 #define BUILD_IRQ(nr) \
 144 asmlinkage void IRQ_NAME(nr); \
 145 __asm__( \
 146 "\n.p2align\n" \
 147 "IRQ" #nr "_interrupt:\n\t" \
 148         "push $~(" #nr ") ; " \
 149         "jmp common_interrupt");
 150
 151 #define platform_legacy_irq(irq)        ((irq) < 16)
 152
 153 #endif
 154
 155 #endif /* _ASM_HW_IRQ_H */