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comparison src/m/mips.h @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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427:0a0253eac470 428:3ecd8885ac67
1 /* m- file for Mips machines.
2 Copyright (C) 1987, 1992 Free Software Foundation, Inc.
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 XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: FSF 19.31. */
22
23 /* The following line tells the configuration script what sort of
24 operating system this machine is likely to run.
25 USUAL-OPSYS="note"
26
27 NOTE-START
28 Use m-mips4.h for RISCOS version 4; use s-bsd4-3.h with the BSD world.
29 Note that the proper m- file for the Decstation is m-pmax.h.
30 NOTE-END */
31
32 /* Define WORD_MACHINE if addresses and such have
33 * to be corrected before they can be used as byte counts. */
34
35 #undef WORD_MACHINE
36
37 /* Define how to take a char and sign-extend into an int.
38 On machines where char is signed, this is a no-op. */
39
40 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
41
42 /* Now define a symbol for the cpu type, if your compiler
43 does not define it automatically:
44 Ones defined so far include vax, m68000, ns16000, pyramid,
45 orion, tahoe, APOLLO and many others */
46 #ifndef mips
47 # define mips
48 #endif
49
50 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
51 the bit field into an int. In other words, if bit fields
52 are always unsigned.
53
54 If you use NO_UNION_TYPE, this flag does not matter. */
55
56 #define EXPLICIT_SIGN_EXTEND
57
58 /* Data type of load average, as read out of kmem. */
59
60 #define LOAD_AVE_TYPE long
61
62 /* Convert that into an integer that is 100 for a load average of 1.0 */
63
64 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
65
66 #ifndef linux
67 /* CDC EP/IX 1.4.3 uses /unix */
68
69 #undef KERNEL_FILE
70 #define KERNEL_FILE "/unix"
71 #endif /* ! linux */
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 #undef 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
88 /* Define C_ALLOCA if this machine does not support a true alloca
89 and the one written in C should be used instead.
90 Define HAVE_ALLOCA to say that the system provides a properly
91 working alloca function and it should be used.
92 Define neither one if an assembler-language alloca
93 in the file alloca.s should be used. */
94
95 #ifdef __GNUC__
96 #define HAVE_ALLOCA
97 #else
98 #define C_ALLOCA
99 #endif
100
101 /* Define NO_REMAP if memory segmentation makes it not work well
102 to change the boundary between the text section and data section
103 when Emacs is dumped. If you define this, the preloaded Lisp
104 code will not be sharable; but that's better than failing completely. */
105
106 #define NO_REMAP
107
108 /* This machine requires completely different unexec code
109 which lives in a separate file. Specify the file name. */
110
111 #ifndef linux
112 #define UNEXEC "unexmips.o"
113 #endif /* !linux */
114 /* Describe layout of the address space in an executing process. */
115
116 #ifdef linux
117 #define TEXT_START 0x00400000
118 #define DATA_START 0x10000000
119 #define DATA_SEG_BITS 0x10000000
120 #else /* !linux */
121 #define TEXT_START 0x400000
122 #define DATA_START 0x800000
123 #endif /* linux */
124
125 /* Alter some of the options used when linking. */
126
127 #if !defined(NEWSOS5) && !defined(linux)
128 #ifdef BSD
129
130 /* DECstations don't have this library. */
131 /* #define LIBS_MACHINE "-lmld" */
132
133 #define LD_SWITCH_MACHINE "-D 800000"
134 #define LIBS_DEBUG
135
136 #define LINKER "/bsd43/bin/ld"
137
138 #else /* not BSD */
139
140 #undef LIBS_MACHINE
141 #define LD_SWITCH_MACHINE "-D 800000 -g3"
142 #define START_FILES "pre-crt0.o /usr/lib/crt1.o"
143 #define LIB_STANDARD "-lbsd -lc /usr/lib/crtn.o"
144 #define LIBS_TERMCAP "-lcurses"
145
146 #define C_SWITCH_MACHINE "-I/usr/include/bsd"
147 #define C_DEBUG_SWITCH "-O -g3"
148
149 #endif /* not BSD */
150 #endif /* !NEWSOS5 && !linux */
151
152 #if !defined(NEWSOS5) && !defined(linux)
153 #ifdef USG
154
155 /* Don't try to use SIGIO even though it is defined. */
156 #define BROKEN_SIGIO
157
158 /* Describe special kernel features. */
159
160 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
161 #include <bsd/sys/time.h>
162 #endif
163
164 /* The `select' in the system won't work for pipes, so don't use it. */
165 #undef HAVE_SELECT /* override configuration decision */
166
167 #define HAVE_PTYS
168
169 /* ??? */
170 #define IRIS
171
172 #endif /* USG */
173
174 #ifdef BSD
175 #define COFF
176 #define TERMINFO
177 #undef MAIL_USE_FLOCK /* Someone should check this. */
178 #endif /* BSD */
179 #endif /* !NEWSOS5 && !linux */