include/asm-x86/irq_vectors.h

   1 #ifndef _ASM_IRQ_VECTORS_H
   2 #define _ASM_IRQ_VECTORS_H
   3
   4 #include <linux/threads.h>
   5
   6 #define NMI_VECTOR              0x02
   7
   8 /*
   9  * IDT vectors usable for external interrupt sources start
  10  * at 0x20:
  11  */
  12 #define FIRST_EXTERNAL_VECTOR   0x20
  13
  14 #ifdef CONFIG_X86_32
  15 # define SYSCALL_VECTOR         0x80
  16 #else
  17 # define IA32_SYSCALL_VECTOR    0x80
  18 #endif
  19
  20 /*
  21  * Reserve the lowest usable priority level 0x20 - 0x2f for triggering
  22  * cleanup after irq migration on 64 bit.
  23  */
  24 #define IRQ_MOVE_CLEANUP_VECTOR FIRST_EXTERNAL_VECTOR
  25
  26 /*
  27  * Vectors 0x20-0x2f are used for ISA interrupts on 32 bit.
  28  * Vectors 0x30-0x3f are used for ISA interrupts on 64 bit.
  29  */
  30 #ifdef CONFIG_X86_32
  31 #define IRQ0_VECTOR             (FIRST_EXTERNAL_VECTOR)
  32 #else
  33 #define IRQ0_VECTOR             (FIRST_EXTERNAL_VECTOR + 0x10)
  34 #endif
  35 #define IRQ1_VECTOR             (IRQ0_VECTOR + 1)
  36 #define IRQ2_VECTOR             (IRQ0_VECTOR + 2)
  37 #define IRQ3_VECTOR             (IRQ0_VECTOR + 3)
  38 #define IRQ4_VECTOR             (IRQ0_VECTOR + 4)
  39 #define IRQ5_VECTOR             (IRQ0_VECTOR + 5)
  40 #define IRQ6_VECTOR             (IRQ0_VECTOR + 6)
  41 #define IRQ7_VECTOR             (IRQ0_VECTOR + 7)
  42 #define IRQ8_VECTOR             (IRQ0_VECTOR + 8)
  43 #define IRQ9_VECTOR             (IRQ0_VECTOR + 9)
  44 #define IRQ10_VECTOR            (IRQ0_VECTOR + 10)
  45 #define IRQ11_VECTOR            (IRQ0_VECTOR + 11)
  46 #define IRQ12_VECTOR            (IRQ0_VECTOR + 12)
  47 #define IRQ13_VECTOR            (IRQ0_VECTOR + 13)
  48 #define IRQ14_VECTOR            (IRQ0_VECTOR + 14)
  49 #define IRQ15_VECTOR            (IRQ0_VECTOR + 15)
  50
  51 /*
  52  * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
  53  *
  54  *  some of the following vectors are 'rare', they are merged
  55  *  into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
  56  *  TLB, reschedule and local APIC vectors are performance-critical.
  57  *
  58  *  Vectors 0xf0-0xfa are free (reserved for future Linux use).
  59  */
  60 #ifdef CONFIG_X86_32
  61
  62 # define SPURIOUS_APIC_VECTOR           0xff
  63 # define ERROR_APIC_VECTOR              0xfe
  64 # define INVALIDATE_TLB_VECTOR          0xfd
  65 # define RESCHEDULE_VECTOR              0xfc
  66 # define CALL_FUNCTION_VECTOR           0xfb
  67 # define THERMAL_APIC_VECTOR            0xf0
  68
  69 #else
  70
  71 #define SPURIOUS_APIC_VECTOR            0xff
  72 #define ERROR_APIC_VECTOR               0xfe
  73 #define RESCHEDULE_VECTOR               0xfd
  74 #define CALL_FUNCTION_VECTOR            0xfc
  75 #define THERMAL_APIC_VECTOR             0xfa
  76 #define THRESHOLD_APIC_VECTOR           0xf9
  77 #define INVALIDATE_TLB_VECTOR_END       0xf7
  78 #define INVALIDATE_TLB_VECTOR_START     0xf0    /* f0-f7 used for TLB flush */
  79
  80 #define NUM_INVALIDATE_TLB_VECTORS      8
  81
  82 #endif
  83
  84 /*
  85  * Local APIC timer IRQ vector is on a different priority level,
  86  * to work around the 'lost local interrupt if more than 2 IRQ
  87  * sources per level' errata.
  88  */
  89 #define LOCAL_TIMER_VECTOR      0xef
  90
  91 /*
  92  * First APIC vector available to drivers: (vectors 0x30-0xee) we
  93  * start at 0x31(0x41) to spread out vectors evenly between priority
  94  * levels. (0x80 is the syscall vector)
  95  */
  96 #ifdef CONFIG_X86_32
  97 # define FIRST_DEVICE_VECTOR    0x31
  98 #else
  99 # define FIRST_DEVICE_VECTOR    (IRQ15_VECTOR + 2)
 100 #endif
 101
 102 #define NR_VECTORS              256
 103
 104 #define FPU_IRQ                 13
 105
 106 #define FIRST_VM86_IRQ          3
 107 #define LAST_VM86_IRQ           15
 108 #define invalid_vm86_irq(irq)   ((irq) < 3 || (irq) > 15)
 109
 110 #if !defined(CONFIG_X86_VOYAGER)
 111
 112 # if defined(CONFIG_X86_IO_APIC) || defined(CONFIG_PARAVIRT) || defined(CONFIG_X86_VISWS)
 113
 114 #  define NR_IRQS               224
 115
 116 #  if (224 >= 32 * NR_CPUS)
 117 #   define NR_IRQ_VECTORS       NR_IRQS
 118 #  else
 119 #   define NR_IRQ_VECTORS       (32 * NR_CPUS)
 120 #  endif
 121
 122 # else /* IO_APIC || PARAVIRT */
 123
 124 #  define NR_IRQS               16
 125 #  define NR_IRQ_VECTORS        NR_IRQS
 126
 127 # endif
 128
 129 #else /* !VISWS && !VOYAGER */
 130
 131 # define NR_IRQS                224
 132 # define NR_IRQ_VECTORS         NR_IRQS
 133
 134 #endif /* VISWS */
 135
 136 /* Voyager specific defines */
 137 /* These define the CPIs we use in linux */
 138 #define VIC_CPI_LEVEL0                  0
 139 #define VIC_CPI_LEVEL1                  1
 140 /* now the fake CPIs */
 141 #define VIC_TIMER_CPI                   2
 142 #define VIC_INVALIDATE_CPI              3
 143 #define VIC_RESCHEDULE_CPI              4
 144 #define VIC_ENABLE_IRQ_CPI              5
 145 #define VIC_CALL_FUNCTION_CPI           6
 146
 147 /* Now the QIC CPIs:  Since we don't need the two initial levels,
 148  * these are 2 less than the VIC CPIs */
 149 #define QIC_CPI_OFFSET                  1
 150 #define QIC_TIMER_CPI                   (VIC_TIMER_CPI - QIC_CPI_OFFSET)
 151 #define QIC_INVALIDATE_CPI              (VIC_INVALIDATE_CPI - QIC_CPI_OFFSET)
 152 #define QIC_RESCHEDULE_CPI              (VIC_RESCHEDULE_CPI - QIC_CPI_OFFSET)
 153 #define QIC_ENABLE_IRQ_CPI              (VIC_ENABLE_IRQ_CPI - QIC_CPI_OFFSET)
 154 #define QIC_CALL_FUNCTION_CPI           (VIC_CALL_FUNCTION_CPI - QIC_CPI_OFFSET)
 155
 156 #define VIC_START_FAKE_CPI              VIC_TIMER_CPI
 157 #define VIC_END_FAKE_CPI                VIC_CALL_FUNCTION_CPI
 158
 159 /* this is the SYS_INT CPI. */
 160 #define VIC_SYS_INT                     8
 161 #define VIC_CMN_INT                     15
 162
 163 /* This is the boot CPI for alternate processors.  It gets overwritten
 164  * by the above once the system has activated all available processors */
 165 #define VIC_CPU_BOOT_CPI                VIC_CPI_LEVEL0
 166 #define VIC_CPU_BOOT_ERRATA_CPI         (VIC_CPI_LEVEL0 + 8)
 167
 168
 169 #endif /* _ASM_IRQ_VECTORS_H */