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59915a53 | 1 | /* machine description file for SEQUENT machines running DYNIX/ptx |
d8f6d720 | 2 | Copyright (C) 1985, 1986, 2002 Free Software Foundation, Inc. |
59915a53 RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
59915a53 RS |
20 | |
21 | ||
177c0ea7 | 22 | /* The following line tells the configuration script what sort of |
59915a53 RS |
23 | operating system this machine is likely to run. |
24 | USUAL-OPSYS="ptx" */ | |
25 | ||
26 | #include "intel386.h" | |
27 | ||
28 | /* Define how to take a char and sign-extend into an int. | |
29 | On machines where char is signed, this is a no-op. */ | |
30 | /* CHECK THIS */ | |
31 | #define SIGN_EXTEND_CHAR(c) (c) | |
32 | ||
33 | /* Now define a symbol for the cpu type, if your compiler | |
34 | does not define it automatically: | |
35 | Ones defined so far include vax, m68000, ns16000, pyramid, | |
36 | orion, tahoe, APOLLO and many others. */ | |
37 | ||
38 | /* BTW: ptx defines _SEQUENT_, i386 */ | |
39 | ||
40 | /* Use type int rather than a union, to represent Lisp_Object */ | |
41 | /* This is desirable for most machines. */ | |
42 | ||
43 | #define NO_UNION_TYPE | |
44 | ||
45 | /* crt0.c should use the vax-bsd style of entry, with these dummy args. */ | |
46 | /* Already defined. Assume prior definition works for PTX. */ | |
47 | #if 0 | |
48 | #undef CRT0_DUMMIES | |
49 | #define CRT0_DUMMIES dummy1, dummy2, dummy3, | |
50 | #endif | |
51 | ||
52 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
53 | the 24-bit bit field into an int. In other words, if bit fields | |
54 | are always unsigned. | |
55 | ||
56 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
57 | ||
58 | #define EXPLICIT_SIGN_EXTEND | |
59 | ||
60 | /* Data type of load average, as read out of kmem. */ | |
61 | ||
cda40aea | 62 | #undef LOAD_AVE_TYPE |
59915a53 RS |
63 | #define LOAD_AVE_TYPE unsigned long |
64 | ||
65 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
66 | ||
cda40aea | 67 | #undef FSCALE |
59915a53 | 68 | #define FSCALE 1000.0 |
cda40aea | 69 | #undef LOAD_AVE_CVT |
59915a53 RS |
70 | #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) |
71 | ||
72 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
73 | Then the function dump-emacs will not be defined | |
74 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
75 | ||
76 | /* #define CANNOT_DUMP */ | |
77 | ||
78 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
79 | pure and impure space as loaded can vary, and even their | |
80 | relative order cannot be relied on. | |
81 | ||
82 | Otherwise Emacs assumes that text space precedes data space, | |
83 | numerically. */ | |
84 | ||
85 | /* #define VIRT_ADDR_VARIES */ | |
86 | ||
59915a53 RS |
87 | /* Define NO_REMAP if memory segmentation makes it not work well |
88 | to change the boundary between the text section and data section | |
89 | when Emacs is dumped. If you define this, the preloaded Lisp | |
90 | code will not be sharable; but that's better than failing completely. */ | |
91 | /* On PTX, can't seem to get a valid executable unless NO_REMAP is | |
92 | defined. This did work in the Sequent patched Emacs 18.57. */ | |
93 | #ifndef NO_REMAP | |
94 | #define NO_REMAP | |
95 | #endif | |
96 | /* #undef NO_REMAP */ | |
97 | ||
177c0ea7 | 98 | /* If a valid PTX executable could be dumped without NO_REMAP defined, |
59915a53 RS |
99 | here's a guess at some defines to make it work. */ |
100 | #ifndef NO_REMAP | |
101 | ||
102 | /* PTX has getpagesize() but it returns 296. Using the default method of | |
103 | including getpagesize.h in unexec.c returns 4096 which seems more | |
104 | reasonable. */ | |
3abc2d46 | 105 | #undef HAVE_GETPAGESIZE |
59915a53 RS |
106 | |
107 | /* Override magic number for a.out header. */ | |
108 | #define EXEC_MAGIC 0411 /* from a.out.h: separated I&D */ | |
109 | ||
110 | #define ADJUST_TEXT_SCNHDR_SIZE | |
111 | #define ADJUST_TEXTBASE | |
112 | ||
113 | /* The file sections in the Symmetry a.out must be on 4K boundaries. */ | |
114 | /* #define DATA_SECTION_ALIGNMENT (4096-1) */ | |
115 | ||
116 | #endif /* ifndef NO_REMAP */ | |
117 | ||
118 | /* Avoids a compiler bug. */ | |
119 | #define TAHOE_REGISTER_BUG | |
120 | ||
121 | /* (short) negative-int doesn't sign-extend correctly. */ | |
122 | #define SHORT_CAST_BUG | |
123 | ||
124 | /* Cause compilations to be done in parallel in ymakefile. */ | |
125 | #define MAKE_PARALLEL $& | |
126 | ||
127 | /* Use terminfo library. */ | |
128 | #define LIBS_TERMCAP -ltermlib | |
129 | ||
ab5796a9 MB |
130 | /* arch-tag: 0494629b-7e11-4f6f-865f-62254ac46099 |
131 | (do not change this comment) */ |