projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 28a753c6 WJ |
1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 32 | * | |
| 33 | * @(#)specialreg.h 7.1 (Berkeley) 5/9/91 | |
| 42d41470 BE |
34 | * |
| 35 | * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE | |
| 36 | * -------------------- ----- ---------------------- | |
| 37 | * CURRENT PATCH LEVEL: 1 00154 | |
| 38 | * -------------------- ----- ---------------------- | |
| 39 | * | |
| 40 | * 20 Apr 93 Bruce Evans New npx-0.5 code | |
| 41 | * | |
| 28a753c6 WJ |
42 | */ |
| 43 | ||
| 44 | /* | |
| 42d41470 | 45 | * Bits in 386 special registers: |
| 28a753c6 WJ |
46 | */ |
| 47 | ||
| 48 | #define CR0_PE 0x00000001 /* Protected mode Enable */ | |
| 42d41470 BE |
49 | #define CR0_MP 0x00000002 /* "Math" Present (NPX or NPX emulator) */ |
| 50 | #ifdef notused | |
| 51 | #define CR0_EM 0x00000004 /* EMulate non-NPX coproc. (trap ESC only) */ | |
| 52 | #endif | |
| 53 | #define CR0_TS 0x00000008 /* Task Switched (if MP, trap ESC and WAIT) */ | |
| 54 | #ifdef notused | |
| 55 | #define CR0_ET 0x00000010 /* Extension Type (387 (if set) vs 287) */ | |
| 56 | #endif | |
| 57 | #define CR0_PG 0x80000000 /* PaGing enable */ | |
| 58 | ||
| 59 | /* | |
| 60 | * Bits in 486 special registers: | |
| 61 | */ | |
| 62 | ||
| 63 | #define CR0_NE 0x00000020 /* Numeric Error enable (EX16 vs IRQ13) */ | |
| 64 | #define CR0_WP 0x00010000 /* Write Protect (honor ~PG_W in all modes) */ | |
| 65 | #ifdef notyet | |
| 66 | #define CR0_AM 0x00040000 /* Alignment Mask (set to enable AC flag) */ | |
| 67 | #endif |