code.delx.au - gnu-emacs/blob - src/m/mips.h

   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 GNU Emacs; 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
  22 /* The following line tells the configuration script what sort of
  23    operating system this machine is likely to run.
  24    USUAL-OPSYS="note"
  25
  26 NOTE-START
  27 Use m-mips4.h for RISCOS version 4; use s-bsd4-3.h with the BSD world.
  28 Note that the proper m- file for the Decstation is m-pmax.h.
  29 NOTE-END  */
  30
  31 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  32    is the most significant byte.  */
  33
  34 #define WORDS_BIG_ENDIAN
  35
  36 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  37  * group of arguments and treat it as an array of the arguments.  */
  38
  39 #define NO_ARG_ARRAY
  40
  41 /* Define WORD_MACHINE if addresses and such have
  42  * to be corrected before they can be used as byte counts.  */
  43
  44 #undef WORD_MACHINE
  45
  46 /* Define how to take a char and sign-extend into an int.
  47    On machines where char is signed, this is a no-op.  */
  48
  49 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  50
  51 /* Now define a symbol for the cpu type, if your compiler
  52    does not define it automatically:
  53    Ones defined so far include vax, m68000, ns16000, pyramid,
  54    orion, tahoe, APOLLO and many others */
  55 #ifndef mips
  56 #       define mips
  57 #endif
  58
  59 /* Use type int rather than a union, to represent Lisp_Object */
  60 /* This is desirable for most machines.  */
  61
  62 #define NO_UNION_TYPE
  63
  64 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  65    the 24-bit bit field into an int.  In other words, if bit fields
  66    are always unsigned.
  67
  68    If you use NO_UNION_TYPE, this flag does not matter.  */
  69
  70 #define EXPLICIT_SIGN_EXTEND
  71
  72 /* Data type of load average, as read out of kmem.  */
  73
  74 #define LOAD_AVE_TYPE long
  75
  76 /* Convert that into an integer that is 100 for a load average of 1.0  */
  77
  78 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
  79
  80 /* CDC EP/IX 1.4.3 uses /unix */
  81
  82 #undef KERNEL_FILE
  83 #define KERNEL_FILE "/unix"
  84
  85 /* Define CANNOT_DUMP on machines where unexec does not work.
  86    Then the function dump-emacs will not be defined
  87    and temacs will do (load "loadup") automatically unless told otherwise.  */
  88
  89 #undef CANNOT_DUMP
  90
  91 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  92    pure and impure space as loaded can vary, and even their
  93    relative order cannot be relied on.
  94
  95    Otherwise Emacs assumes that text space precedes data space,
  96    numerically.  */
  97
  98 /* #define VIRT_ADDR_VARIES */
  99
 100 /* Define C_ALLOCA if this machine does not support a true alloca
 101    and the one written in C should be used instead.
 102    Define HAVE_ALLOCA to say that the system provides a properly
 103    working alloca function and it should be used.
 104    Define neither one if an assembler-language alloca
 105    in the file alloca.s should be used.  */
 106
 107 #ifdef __GNUC__
 108 #define HAVE_ALLOCA
 109 #else
 110 #define C_ALLOCA
 111 #endif
 112
 113 /* Define NO_REMAP if memory segmentation makes it not work well
 114    to change the boundary between the text section and data section
 115    when Emacs is dumped.  If you define this, the preloaded Lisp
 116    code will not be sharable; but that's better than failing completely.  */
 117
 118 #define NO_REMAP
 119
 120 /* This machine requires completely different unexec code
 121    which lives in a separate file.  Specify the file name.  */
 122
 123 #undef UNEXEC
 124 #define UNEXEC unexmips.o
 125
 126 /* Describe layout of the address space in an executing process.  */
 127
 128 #define TEXT_START 0x400000
 129 #define DATA_START 0x800000
 130
 131 /* Alter some of the options used when linking.  */
 132
 133 #ifndef NEWSOS5
 134 #ifdef BSD_SYSTEM
 135
 136 /* DECstations don't have this library.
 137    #define LIBS_MACHINE -lmld  */
 138
 139 #define LD_SWITCH_MACHINE -D 800000
 140 #define LIBS_DEBUG
 141
 142 #define LINKER /bsd43/bin/ld
 143
 144 #else /* not BSD_SYSTEM */
 145
 146 #if defined(__GNUC__) && defined(_ABIN32)
 147 #define LIBS_MACHINE
 148 #else
 149 #define LIBS_MACHINE -lmld
 150 #endif
 151
 152 #define LD_SWITCH_MACHINE -D 800000 -g3
 153 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 154 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 155 #define LIBS_TERMCAP -lcurses
 156
 157 #define C_SWITCH_MACHINE -I/usr/include/bsd
 158 #define C_DEBUG_SWITCH -O -g3
 159
 160 #if defined(HAVE_X_WINDOWS) && defined(HAVE_X11)
 161 #define HAVE_VFORK              /* Graciously provided by libX.a */
 162 #endif
 163
 164 #endif /* not BSD_SYSTEM */
 165 #endif /* not NEWSOS5 */
 166 \f
 167 /* The standard definitions of these macros would work ok,
 168    but these are faster because the constants are short.  */
 169
 170 #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
 171
 172 #define XSET(var, type, ptr)                                            \
 173   ((var) =                                                              \
 174    ((int)(type) << VALBITS)                                             \
 175    + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
 176
 177 #define XUNMARK(a)                                                      \
 178   ((a) =                                                                \
 179    (((unsigned)(a) << (BITS_PER_INT-GCTYPEBITS-VALBITS))                \
 180     >> (BITS_PER_INT-GCTYPEBITS-VALBITS)))
 181 \f
 182 #ifndef NEWSOS5
 183 #ifdef USG
 184
 185 /* Cancel certain parts of standard sysV support.  */
 186 #undef NONSYSTEM_DIR_LIBRARY
 187 #define SYSV_SYSTEM_DIR
 188 #undef static
 189
 190 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 191 #undef SIGIO
 192 #define BROKEN_FIONREAD
 193
 194 /* Describe special kernel features.  */
 195
 196 #define HAVE_SYSVIPC
 197
 198 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
 199 #include <bsd/sys/time.h>
 200 #endif
 201
 202 /* The `select' in the system won't work for pipes, so don't use it.  */
 203 #undef HAVE_SELECT /* override configuration decision */
 204
 205 #define HAVE_GETWD
 206 #define HAVE_GETTIMEOFDAY
 207
 208 #define HAVE_PTYS
 209 #define HAVE_SOCKETS
 210
 211 #undef NOMULTIPLEJOBS
 212
 213 /* ??? */
 214 #define IRIS
 215
 216 #endif /* USG */
 217
 218 #ifdef BSD_SYSTEM
 219 #define COFF
 220 #define TERMINFO
 221 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 222 #undef HAVE_UNION_WAIT
 223 #endif /* BSD_SYSTEM */
 224
 225 #endif /* not NEWSOS5 */