xv6/traps.h
Russ Cox 8b75366ce4 s/IRQ_OFFSET/T_IRQ0/: it's a trap number, not an irq number.
move the SYSCALL number up, so does not overlap the IRQ traps.
2009-07-11 18:17:32 -07:00

38 lines
1.5 KiB
C

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