projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 4bd1c0bf WN |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * William Jolitz. | |
| 7 | * | |
| e375aed8 | 8 | * %sccs.include.redist.c% |
| 4bd1c0bf | 9 | * |
| e375aed8 | 10 | * @(#)psl.h 5.2 (Berkeley) %G% |
| 4bd1c0bf WN |
11 | */ |
| 12 | ||
| ff5d8a40 BJ |
13 | /* |
| 14 | * 386 processor status longword. | |
| 15 | */ | |
| 16 | #define PSL_C 0x00000001 /* carry bit */ | |
| 17 | #define PSL_PF 0x00000004 /* parity bit */ | |
| 18 | #define PSL_AF 0x00000010 /* bcd carry bit */ | |
| 19 | #define PSL_Z 0x00000040 /* zero bit */ | |
| 20 | #define PSL_N 0x00000080 /* negative bit */ | |
| 21 | #define PSL_ALLCC 0x000000d5 /* all cc bits - unlikely */ | |
| 22 | #define PSL_T 0x00000100 /* trace enable bit */ | |
| 23 | #define PSL_I 0x00000200 /* interrupt enable bit */ | |
| 24 | #define PSL_D 0x00000400 /* string instruction direction bit */ | |
| 25 | #define PSL_V 0x00000800 /* overflow bit */ | |
| 26 | #define PSL_IOPL 0x00003000 /* i/o priviledge level enable */ | |
| 27 | #define PSL_NT 0x00004000 /* nested task bit */ | |
| 28 | #define PSL_RF 0x00010000 /* restart flag bit */ | |
| 29 | #define PSL_VM 0x00020000 /* virtual 8086 mode bit */ | |
| 30 | ||
| 31 | #define PSL_MBZ 0xfffc7fb7 /* must be zero bits */ | |
| 32 | #define PSL_MBO 0x00000002 /* must be one bits */ | |
| 33 | ||
| 34 | #define PSL_USERSET (PSL_IOPL) | |
| 35 | #define PSL_USERCLR (PSL_I|PSL_NT) |