1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)psl.h 8.1 (Berkeley) 06/11/93 11 */ 12 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) 36