Commit | Line | Data |
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20c428fd | 1 | /* machine description file for ISI 68000's |
b908093d TTN |
2 | Copyright (C) 1985, 1986, 2002, 2003, 2004, |
3 | 2005 Free Software Foundation, Inc. | |
20c428fd JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
17385adc | 9 | the Free Software Foundation; either version 2, or (at your option) |
20c428fd JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
20c428fd JB |
21 | |
22 | ||
177c0ea7 | 23 | /* The following line tells the configuration script what sort of |
20c428fd JB |
24 | operating system this machine is likely to run. |
25 | USUAL-OPSYS="note" | |
26 | ||
27 | NOTE-START | |
28 | Use `-opsystem=bsd4-2' or `-opsystem=bsd4-3'. | |
29 | NOTE-END */ | |
30 | ||
31 | #define ISI68K | |
32 | ||
74d3f806 KH |
33 | /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word |
34 | is the most significant byte. */ | |
35 | ||
36 | #define WORDS_BIG_ENDIAN | |
37 | ||
20c428fd JB |
38 | /* Say this machine is a 68000 */ |
39 | ||
40 | #define m68000 | |
41 | ||
42 | /* Use type int rather than a union, to represent Lisp_Object */ | |
43 | ||
44 | #define NO_UNION_TYPE | |
45 | ||
46 | /* XINT must explicitly sign-extend */ | |
47 | ||
48 | #define EXPLICIT_SIGN_EXTEND | |
49 | ||
50 | /* Data type of load average, as read out of kmem. */ | |
51 | ||
52 | #ifdef BSD4_3 | |
53 | #define LOAD_AVE_TYPE long | |
54 | #else | |
55 | #define LOAD_AVE_TYPE double | |
56 | #endif BSD4_3 | |
57 | ||
58 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
59 | ||
60 | #ifdef BSD4_3 | |
61 | #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) | |
62 | #else | |
63 | #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0)) | |
64 | #endif | |
65 | ||
66 | /* Mask for address bits within a memory segment */ | |
67 | ||
68 | #define SEGMENT_MASK 0x1ffff | |
69 | ||
70 | /* use the -20 switch to get the 68020 code */ | |
71 | /* #define C_SWITCH_MACHINE -20 */ | |
72 | ||
73 | /* Use the version of the library for the 68020 | |
74 | because the standard library requires some special hacks in crt0 | |
75 | which the GNU crt0 does not have. */ | |
76 | ||
77 | #define LIB_STANDARD -lmc | |
78 | ||
79 | /* macros to make unexec work right */ | |
80 | ||
81 | #define A_TEXT_OFFSET(HDR) sizeof(HDR) | |
82 | #define A_TEXT_SEEK(HDR) sizeof(HDR) | |
83 | ||
84 | /* A few changes for the newer systems. */ | |
85 | ||
86 | #ifdef BSD4_3 | |
20c428fd JB |
87 | /* The following line affects crt0.c. */ |
88 | #undef m68k | |
89 | ||
90 | #undef LIB_STANDARD | |
91 | #define LIB_STANDARD -lmc -lc | |
92 | #define C_DEBUG_SWITCH -20 -O -X23 | |
93 | #endif | |
ab5796a9 MB |
94 | |
95 | /* arch-tag: 3bfb5a11-d94e-4372-923b-9f47d0851f42 | |
96 | (do not change this comment) */ |