projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a55e280b | 1 | /* psl.h 1.2 86/01/05 */ |
| 0681b8df SL |
2 | |
| 3 | /* | |
| a55e280b | 4 | * TAHOE processor status longword. |
| 0681b8df | 5 | */ |
| 0681b8df SL |
6 | #define PSL_C 0x00000001 /* carry bit */ |
| 7 | #define PSL_V 0x00000002 /* overflow bit */ | |
| 8 | #define PSL_Z 0x00000004 /* zero bit */ | |
| 9 | #define PSL_N 0x00000008 /* negative bit */ | |
| 10 | #define PSL_ALLCC 0x0000000f /* all cc bits - unlikely */ | |
| 11 | #define PSL_T 0x00000010 /* trace enable bit */ | |
| 12 | #define PSL_IV 0x00000020 /* integer overflow enable bit */ | |
| 13 | #define PSL_FU 0x00000040 /* float underflow enable */ | |
| 14 | #define PSL_DBL 0x00000080 /* f.p. prescision indicator */ | |
| 15 | #define PSL_SFE 0x00000100 /* system-forced-exception */ | |
| 16 | #define PSL_IPL 0x001f0000 /* interrupt priority level */ | |
| a55e280b | 17 | #define PSL_PRVMOD 0x00000000 /* previous mode (kernel mode) */ |
| 0681b8df SL |
18 | #define PSL_CURMOD 0x01000000 /* current mode (all on is user) */ |
| 19 | #define PSL_IS 0x04000000 /* interrupt stack */ | |
| 20 | #define PSL_TP 0x40000000 /* trace pending */ | |
| 21 | ||
| a55e280b | 22 | #define PSL_MBZ 0xbae0fe00 /* must be zero bits */ |
| 0681b8df SL |
23 | |
| 24 | #define PSL_USERSET (PSL_CURMOD) | |
| a55e280b | 25 | #define PSL_USERCLR (PSL_IS|PSL_IPL|PSL_MBZ|PSL_SFE|PSL_DBL|PSL_FU) |