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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20
  21 /* The following line tells the configuration script what sort of
  22    operating system this machine is likely to run.
  23    USUAL-OPSYS="note"
  24
  25 NOTE-START
  26 Use m-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 m-pmax.h.
  28 NOTE-END  */
  29
  30 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  31    is the most significant byte.  */
  32
  33 #define WORDS_BIG_ENDIAN
  34
  35 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  36  * group of arguments and treat it as an array of the arguments.  */
  37
  38 #define NO_ARG_ARRAY
  39
  40 /* Define WORD_MACHINE if addresses and such have
  41  * to be corrected before they can be used as byte counts.  */
  42
  43 #undef WORD_MACHINE
  44
  45 /* Define how to take a char and sign-extend into an int.
  46    On machines where char is signed, this is a no-op.  */
  47
  48 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  49
  50 /* Now define a symbol for the cpu type, if your compiler
  51    does not define it automatically:
  52    Ones defined so far include vax, m68000, ns16000, pyramid,
  53    orion, tahoe, APOLLO and many others */
  54 #ifndef mips
  55 #       define mips
  56 #endif
  57
  58 /* Use type int rather than a union, to represent Lisp_Object */
  59 /* This is desirable for most machines.  */
  60
  61 #define NO_UNION_TYPE
  62
  63 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  64    the 24-bit bit field into an int.  In other words, if bit fields
  65    are always unsigned.
  66
  67    If you use NO_UNION_TYPE, this flag does not matter.  */
  68
  69 #define EXPLICIT_SIGN_EXTEND
  70
  71 /* Data type of load average, as read out of kmem.  */
  72
  73 #define LOAD_AVE_TYPE long
  74
  75 /* Convert that into an integer that is 100 for a load average of 1.0  */
  76
  77 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
  78
  79 /* CDC EP/IX 1.4.3 uses /unix */
  80
  81 #undef KERNEL_FILE
  82 #define KERNEL_FILE "/unix"
  83
  84 /* Define CANNOT_DUMP on machines where unexec does not work.
  85    Then the function dump-emacs will not be defined
  86    and temacs will do (load "loadup") automatically unless told otherwise.  */
  87
  88 #undef CANNOT_DUMP
  89
  90 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  91    pure and impure space as loaded can vary, and even their
  92    relative order cannot be relied on.
  93
  94    Otherwise Emacs assumes that text space precedes data space,
  95    numerically.  */
  96
  97 /* #define VIRT_ADDR_VARIES */
  98
  99 /* Define C_ALLOCA if this machine does not support a true alloca
 100    and the one written in C should be used instead.
 101    Define HAVE_ALLOCA to say that the system provides a properly
 102    working alloca function and it should be used.
 103    Define neither one if an assembler-language alloca
 104    in the file alloca.s should be used.  */
 105
 106 #ifdef __GNUC__
 107 #define HAVE_ALLOCA
 108 #else
 109 #define C_ALLOCA
 110 #endif
 111
 112 /* Define NO_REMAP if memory segmentation makes it not work well
 113    to change the boundary between the text section and data section
 114    when Emacs is dumped.  If you define this, the preloaded Lisp
 115    code will not be sharable; but that's better than failing completely.  */
 116
 117 #define NO_REMAP
 118
 119 /* This machine requires completely different unexec code
 120    which lives in a separate file.  Specify the file name.  */
 121
 122 #define UNEXEC unexmips.o
 123
 124 /* Describe layout of the address space in an executing process.  */
 125
 126 #define TEXT_START 0x400000
 127 #define DATA_START 0x800000
 128
 129 /* Alter some of the options used when linking.  */
 130
 131 #ifndef NEWSOS5
 132 #ifdef BSD
 133
 134 /* DECstations don't have this library.
 135    #define LIBS_MACHINE -lmld  */
 136
 137 #define LD_SWITCH_MACHINE -D 800000
 138 #define LIBS_DEBUG
 139
 140 #define LINKER /bsd43/bin/ld
 141
 142 #else /* not BSD */
 143
 144 #define LIBS_MACHINE -lmld
 145 #define LD_SWITCH_MACHINE -D 800000 -g3
 146 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 147 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 148 #define LIBS_TERMCAP -lcurses
 149
 150 #define C_SWITCH_MACHINE -I/usr/include/bsd
 151 #define C_DEBUG_SWITCH -O -g3
 152
 153 #if defined(HAVE_X_WINDOWS) && defined(HAVE_X11)
 154 #define HAVE_VFORK              /* Graciously provided by libX.a */
 155 #endif
 156
 157 #endif /* not BSD */
 158 #endif /* not NEWSOS5 */
 159 \f
 160 /* The standard definitions of these macros would work ok,
 161    but these are faster because the constants are short.  */
 162
 163 #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
 164
 165 #define XSET(var, type, ptr)                                            \
 166   ((var) =                                                              \
 167    ((int)(type) << VALBITS)                                             \
 168    + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
 169
 170 #define XUNMARK(a)                                                      \
 171   ((a) =                                                                \
 172    (((unsigned)(a) << (BITS_PER_INT-GCTYPEBITS-VALBITS))                \
 173     >> (BITS_PER_INT-GCTYPEBITS-VALBITS)))
 174 \f
 175 #ifndef NEWSOS5
 176 #ifdef USG
 177
 178 /* Cancel certain parts of standard sysV support.  */
 179 #undef NONSYSTEM_DIR_LIBRARY
 180 #define SYSV_SYSTEM_DIR
 181 #undef static
 182
 183 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 184 #undef SIGIO
 185 #define BROKEN_FIONREAD
 186
 187 /* Describe special kernel features.  */
 188
 189 #define HAVE_SYSVIPC
 190
 191 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
 192 #include <bsd/sys/time.h>
 193 #endif
 194
 195 /* The `select' in the system won't work for pipes, so don't use it.  */
 196 #undef HAVE_SELECT /* override configuration decision */
 197
 198 #define HAVE_GETWD
 199 #define HAVE_GETTIMEOFDAY
 200
 201 #define HAVE_PTYS
 202 #define HAVE_SOCKETS
 203
 204 #undef NOMULTIPLEJOBS
 205
 206 /* ??? */
 207 #define IRIS
 208
 209 #endif /* USG */
 210
 211 #ifdef BSD
 212 #define COFF
 213 #define TERMINFO
 214 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 215 #undef HAVE_UNION_WAIT
 216 #endif /* BSD */
 217
 218 #endif /* not NEWSOS5 */