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59915a53 | 1 | /* machine description file for SEQUENT machines running DYNIX/ptx |
429ab54e | 2 | Copyright (C) 1985, 1986, 2001, 2002, 2003, 2004, |
49c1c3cc | 3 | 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
59915a53 RS |
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 | |
4a9f99bd | 9 | the Free Software Foundation; either version 3, or (at your option) |
59915a53 RS |
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. */ | |
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21 | |
22 | ||
177c0ea7 | 23 | /* The following line tells the configuration script what sort of |
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24 | operating system this machine is likely to run. |
25 | USUAL-OPSYS="ptx" */ | |
26 | ||
27 | #include "intel386.h" | |
28 | ||
29 | /* Define how to take a char and sign-extend into an int. | |
30 | On machines where char is signed, this is a no-op. */ | |
31 | /* CHECK THIS */ | |
32 | #define SIGN_EXTEND_CHAR(c) (c) | |
33 | ||
34 | /* Now define a symbol for the cpu type, if your compiler | |
35 | does not define it automatically: | |
36 | Ones defined so far include vax, m68000, ns16000, pyramid, | |
37 | orion, tahoe, APOLLO and many others. */ | |
38 | ||
39 | /* BTW: ptx defines _SEQUENT_, i386 */ | |
40 | ||
41 | /* Use type int rather than a union, to represent Lisp_Object */ | |
42 | /* This is desirable for most machines. */ | |
43 | ||
44 | #define NO_UNION_TYPE | |
45 | ||
46 | /* crt0.c should use the vax-bsd style of entry, with these dummy args. */ | |
47 | /* Already defined. Assume prior definition works for PTX. */ | |
48 | #if 0 | |
49 | #undef CRT0_DUMMIES | |
50 | #define CRT0_DUMMIES dummy1, dummy2, dummy3, | |
51 | #endif | |
52 | ||
53 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
54 | the 24-bit bit field into an int. In other words, if bit fields | |
55 | are always unsigned. | |
56 | ||
57 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
58 | ||
59 | #define EXPLICIT_SIGN_EXTEND | |
60 | ||
61 | /* Data type of load average, as read out of kmem. */ | |
62 | ||
cda40aea | 63 | #undef LOAD_AVE_TYPE |
59915a53 RS |
64 | #define LOAD_AVE_TYPE unsigned long |
65 | ||
66 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
67 | ||
cda40aea | 68 | #undef FSCALE |
59915a53 | 69 | #define FSCALE 1000.0 |
cda40aea | 70 | #undef LOAD_AVE_CVT |
59915a53 RS |
71 | #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) |
72 | ||
73 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
74 | Then the function dump-emacs will not be defined | |
75 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
76 | ||
77 | /* #define CANNOT_DUMP */ | |
78 | ||
79 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
80 | pure and impure space as loaded can vary, and even their | |
81 | relative order cannot be relied on. | |
82 | ||
83 | Otherwise Emacs assumes that text space precedes data space, | |
84 | numerically. */ | |
85 | ||
86 | /* #define VIRT_ADDR_VARIES */ | |
87 | ||
59915a53 RS |
88 | /* Define NO_REMAP if memory segmentation makes it not work well |
89 | to change the boundary between the text section and data section | |
90 | when Emacs is dumped. If you define this, the preloaded Lisp | |
91 | code will not be sharable; but that's better than failing completely. */ | |
92 | /* On PTX, can't seem to get a valid executable unless NO_REMAP is | |
93 | defined. This did work in the Sequent patched Emacs 18.57. */ | |
94 | #ifndef NO_REMAP | |
95 | #define NO_REMAP | |
96 | #endif | |
97 | /* #undef NO_REMAP */ | |
98 | ||
177c0ea7 | 99 | /* If a valid PTX executable could be dumped without NO_REMAP defined, |
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100 | here's a guess at some defines to make it work. */ |
101 | #ifndef NO_REMAP | |
102 | ||
103 | /* PTX has getpagesize() but it returns 296. Using the default method of | |
104 | including getpagesize.h in unexec.c returns 4096 which seems more | |
105 | reasonable. */ | |
3abc2d46 | 106 | #undef HAVE_GETPAGESIZE |
59915a53 RS |
107 | |
108 | /* Override magic number for a.out header. */ | |
109 | #define EXEC_MAGIC 0411 /* from a.out.h: separated I&D */ | |
110 | ||
111 | #define ADJUST_TEXT_SCNHDR_SIZE | |
112 | #define ADJUST_TEXTBASE | |
113 | ||
114 | /* The file sections in the Symmetry a.out must be on 4K boundaries. */ | |
115 | /* #define DATA_SECTION_ALIGNMENT (4096-1) */ | |
116 | ||
117 | #endif /* ifndef NO_REMAP */ | |
118 | ||
119 | /* Avoids a compiler bug. */ | |
120 | #define TAHOE_REGISTER_BUG | |
121 | ||
122 | /* (short) negative-int doesn't sign-extend correctly. */ | |
123 | #define SHORT_CAST_BUG | |
124 | ||
125 | /* Cause compilations to be done in parallel in ymakefile. */ | |
126 | #define MAKE_PARALLEL $& | |
127 | ||
128 | /* Use terminfo library. */ | |
129 | #define LIBS_TERMCAP -ltermlib | |
130 | ||
ab5796a9 MB |
131 | /* arch-tag: 0494629b-7e11-4f6f-865f-62254ac46099 |
132 | (do not change this comment) */ |