i386/MIT/src.xv6/traps.h

   1 // x86 trap and interrupt constants.
   2
   3 // Processor-defined:
   4 #define T_DIVIDE         0      // divide error
   5 #define T_DEBUG          1      // debug exception
   6 #define T_NMI            2      // non-maskable interrupt
   7 #define T_BRKPT          3      // breakpoint
   8 #define T_OFLOW          4      // overflow
   9 #define T_BOUND          5      // bounds check
  10 #define T_ILLOP          6      // illegal opcode
  11 #define T_DEVICE         7      // device not available
  12 #define T_DBLFLT         8      // double fault
  13 // #define T_COPROC      9      // reserved (not used since 486)
  14 #define T_TSS           10      // invalid task switch segment
  15 #define T_SEGNP         11      // segment not present
  16 #define T_STACK         12      // stack exception
  17 #define T_GPFLT         13      // general protection fault
  18 #define T_PGFLT         14      // page fault
  19 // #define T_RES        15      // reserved
  20 #define T_FPERR         16      // floating point error
  21 #define T_ALIGN         17      // aligment check
  22 #define T_MCHK          18      // machine check
  23 #define T_SIMDERR       19      // SIMD floating point error
  24
  25 // These are arbitrarily chosen, but with care not to overlap
  26 // processor defined exceptions or interrupt vectors.
  27 #define T_SYSCALL       64      // system call
  28 #define T_DEFAULT      500      // catchall
  29
  30 #define T_IRQ0          32      // IRQ 0 corresponds to int T_IRQ
  31
  32 #define IRQ_TIMER        0
  33 #define IRQ_KBD          1
  34 #define IRQ_COM1         4
  35 #define IRQ_IDE         14
  36 #define IRQ_ERROR       19
  37 #define IRQ_SPURIOUS    31
  38