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code.delx.au - gnu-emacs/blob - src/m/mips.h
1 /* m- file for Mips machines.
2 Copyright (C) 1987, 1992, 1999, 2001, 2002, 2003, 2004, 2005, 2006,
3 2007, 2008 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
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
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
21 /* The following line tells the configuration script what sort of
22 operating system this machine is likely to run.
26 Use mips4.h for RISCOS version 4; use s-bsd4-3.h with the BSD world.
27 Note that the proper m file for the Decstation is pmax.h.
30 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
31 is the most significant byte. */
33 #if ! (defined (__MIPSEL__) || defined (MIPSEL) || defined (_MIPSEL))
34 #define WORDS_BIG_ENDIAN
37 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
38 * group of arguments and treat it as an array of the arguments. */
42 /* Define WORD_MACHINE if addresses and such have
43 * to be corrected before they can be used as byte counts. */
47 /* Define how to take a char and sign-extend into an int.
48 On machines where char is signed, this is a no-op. */
50 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
52 /* Now define a symbol for the cpu type, if your compiler
53 does not define it automatically:
54 Ones defined so far include vax, m68000, ns16000, pyramid,
55 orion, tahoe, APOLLO and many others */
60 /* Use type int rather than a union, to represent Lisp_Object */
61 /* This is desirable for most machines. */
65 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
66 the 24-bit bit field into an int. In other words, if bit fields
69 If you use NO_UNION_TYPE, this flag does not matter. */
71 #define EXPLICIT_SIGN_EXTEND
73 /* Data type of load average, as read out of kmem. */
75 #define LOAD_AVE_TYPE long
77 /* Convert that into an integer that is 100 for a load average of 1.0 */
79 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
81 /* CDC EP/IX 1.4.3 uses /unix */
85 #define KERNEL_FILE "/unix"
86 #endif /* not __linux__ */
88 /* Define CANNOT_DUMP on machines where unexec does not work.
89 Then the function dump-emacs will not be defined
90 and temacs will do (load "loadup") automatically unless told otherwise. */
94 /* Define VIRT_ADDR_VARIES if the virtual addresses of
95 pure and impure space as loaded can vary, and even their
96 relative order cannot be relied on.
98 Otherwise Emacs assumes that text space precedes data space,
101 /* #define VIRT_ADDR_VARIES */
103 /* Define NO_REMAP if memory segmentation makes it not work well
104 to change the boundary between the text section and data section
105 when Emacs is dumped. If you define this, the preloaded Lisp
106 code will not be sharable; but that's better than failing completely. */
110 /* This machine requires completely different unexec code
111 which lives in a separate file. Specify the file name. */
113 #if !defined(__linux__) && !defined(__NetBSD__)
115 #define UNEXEC unexmips.o
116 #endif /* not __linux__ && not __NetBSD__ */
118 /* Describe layout of the address space in an executing process. */
121 #define TEXT_START 0x00400000
122 #define DATA_START 0x10000000
123 #define DATA_SEG_BITS 0x10000000
124 #else /* not __linux__ */
125 #define TEXT_START 0x400000
126 #define DATA_START 0x800000
127 #endif /* __linux__ */
129 /* Alter some of the options used when linking. */
131 #if !defined(__linux__)
134 /* DECstations don't have this library.
135 #define LIBS_MACHINE -lmld */
137 #define LD_SWITCH_MACHINE -D 800000
140 #if defined (__NetBSD__) || defined (__OpenBSD__)
141 #else /* bsd with elf */
142 #define LINKER /bsd43/bin/ld
144 #define LD_SWITCH_MACHINE -D 800000 -g3
145 #define START_FILES pre-crt0.o /usr/lib/crt1.o
146 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
147 #define LIBS_TERMCAP -lcurses
149 #define C_SWITCH_MACHINE -I/usr/include/bsd
150 #define C_DEBUG_SWITCH -O -g3
152 #endif /* bsd with elf */
153 #else /* not BSD_SYSTEM */
155 #if defined(__GNUC__) && defined(_ABIN32)
158 #define LIBS_MACHINE -lmld
161 #endif /* not BSD_SYSTEM */
162 #endif /* not __linux__ */
164 /* The standard definitions of these macros would work ok,
165 but these are faster because the constants are short. */
167 #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
169 #define XSET(var, type, ptr) \
171 ((int)(type) << VALBITS) \
172 + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
174 #if !defined (__linux__)
177 /* Cancel certain parts of standard sysV support. */
178 #undef NONSYSTEM_DIR_LIBRARY
179 #define SYSV_SYSTEM_DIR
182 /* Don't try to use SIGIO or FIONREAD even though they are defined. */
184 #define BROKEN_FIONREAD
186 /* Describe special kernel features. */
190 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
191 #include <bsd/sys/time.h>
194 /* The `select' in the system won't work for pipes, so don't use it. */
195 #undef HAVE_SELECT /* override configuration decision */
200 #undef NOMULTIPLEJOBS
210 #undef MAIL_USE_FLOCK /* Someone should check this. */
211 #undef HAVE_UNION_WAIT
212 #endif /* BSD_SYSTEM */
214 #endif /* not __linux__ */
216 /* arch-tag: 8fd020ee-78a7-4d87-96ce-6129f52f7bee
217 (do not change this comment) */