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
39