1 /* machine description file for Mips machines.
2 Copyright (C) 1987, 1990 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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 1, or (at your option)
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.
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
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* The following line tells the configuration script what sort of
22 operating system this machine is likely to run.
26 Use -opsystem=usg5-2-2 normally, or -opsystem=bsd4-3 with the BSD
30 /* The following three symbols give information on
31 the size of various data types. */
33 #define SHORTBITS 16 /* Number of bits in a short */
35 #define INTBITS 32 /* Number of bits in an int */
37 #define LONGBITS 32 /* Number of bits in a long */
39 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
40 is the most significant byte. */
44 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
45 * group of arguments and treat it as an array of the arguments. */
49 /* Define WORD_MACHINE if addresses and such have
50 * to be corrected before they can be used as byte counts. */
54 /* Now define a symbol for the cpu type, if your compiler
55 does not define it automatically:
56 Ones defined so far include vax, m68000, ns16000, pyramid,
57 orion, tahoe, APOLLO and many others */
62 /* Use type int rather than a union, to represent Lisp_Object */
63 /* This is desirable for most machines. */
67 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
68 the 24-bit bit field into an int. In other words, if bit fields
71 If you use NO_UNION_TYPE, this flag does not matter. */
73 #define EXPLICIT_SIGN_EXTEND
75 /* Data type of load average, as read out of kmem. */
77 #define LOAD_AVE_TYPE long
79 /* Convert that into an integer that is 100 for a load average of 1.0 */
81 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
83 /* Define CANNOT_DUMP on machines where unexec does not work.
84 Then the function dump-emacs will not be defined
85 and temacs will do (load "loadup") automatically unless told otherwise. */
89 /* Define VIRT_ADDR_VARIES if the virtual addresses of
90 pure and impure space as loaded can vary, and even their
91 relative order cannot be relied on.
93 Otherwise Emacs assumes that text space precedes data space,
96 /* #define VIRT_ADDR_VARIES */
98 /* Define C_ALLOCA if this machine does not support a true alloca
99 and the one written in C should be used instead.
100 Define HAVE_ALLOCA to say that the system provides a properly
101 working alloca function and it should be used.
102 Define neither one if an assembler-language alloca
103 in the file alloca.s should be used. */
106 /* #define HAVE_ALLOCA */
108 /* Define NO_REMAP if memory segmentation makes it not work well
109 to change the boundary between the text section and data section
110 when Emacs is dumped. If you define this, the preloaded Lisp
111 code will not be sharable; but that's better than failing completely. */
115 /* This machine requires completely different unexec code
116 which lives in a separate file. Specify the file name. */
118 #define UNEXEC unexmips.o
120 /* Describe layout of the address space in an executing process. */
122 #define TEXT_START 0x400000
123 #define DATA_START 0x800000
125 /* Alter some of the options used when linking. */
129 /* Supposedly the dec machine doesn't have this library.
130 #define LIBS_MACHINE -lmld */
132 #define LD_SWITCH_MACHINE -D 800000
137 #define LIBS_MACHINE -lmld
138 #define LD_SWITCH_MACHINE -D 800000 -g3
139 #define START_FILES pre-crt0.o /usr/lib/crt1.o
140 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
141 #define LIBS_TERMCAP -lcurses
143 #define C_SWITCH_SYSTEM -I/usr/include/bsd
144 #define C_DEBUG_SWITCH -O -g3
146 #if defined(HAVE_X_WINDOWS) && defined(HAVE_X11)
147 #define HAVE_VFORK /* Graciously provided by libX.a */
151 /* The standard definitions of these macros would work ok,
152 but these are faster because the constants are short. */
154 #define XUINT(a) (((unsigned)(a) << INTBITS-VALBITS) >> INTBITS-VALBITS)
156 #define XSET(var, type, ptr) \
157 ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << INTBITS-VALBITS) >> INTBITS-VALBITS))
159 #define XSETINT(a, b) XSET(a, XTYPE(a), b)
160 #define XSETUINT(a, b) XSET(a, XTYPE(a), b)
161 #define XSETPNTR(a, b) XSET(a, XTYPE(a), b)
163 #define XUNMARK(a) ((a) = (((unsigned)(a) << INTBITS-GCTYPEBITS-VALBITS) >> INTBITS-GCTYPEBITS-VALBITS))
166 /* Cancel certain parts of standard sysV support. */
167 #undef NONSYSTEM_DIR_LIBRARY
168 #define SYSV_SYSTEM_DIR
171 /* Don't try to use SIGIO or FIONREAD even though they are defined. */
173 #define BROKEN_FIONREAD
175 /* Describe special kernel features. */
181 #include <bsd/sys/time.h>
184 /* #define HAVE_SELECT
185 The `select' in the system won't work for pipes,
190 #define HAVE_GETTIMEOFDAY
195 #undef NOMULTIPLEJOBS
196 #define utimes utime /* Someone should check this. */
206 #undef MAIL_USE_FLOCK /* Someone should check this. */
207 #undef HAVE_UNION_WAIT