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 /* The following three symbols give information on
  31  the size of various data types.  */
  32
  33 #define SHORTBITS 16            /* Number of bits in a short */
  34
  35 #define INTBITS 32              /* Number of bits in an int */
  36
  37 #define LONGBITS 32             /* Number of bits in a long */
  38
  39 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  40    is the most significant byte.  */
  41
  42 #define WORDS_BIG_ENDIAN
  43
  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.  */
  46
  47 #define NO_ARG_ARRAY
  48
  49 /* Define WORD_MACHINE if addresses and such have
  50  * to be corrected before they can be used as byte counts.  */
  51
  52 #undef WORD_MACHINE
  53
  54 /* Define how to take a char and sign-extend into an int.
  55    On machines where char is signed, this is a no-op.  */
  56
  57 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  58
  59 /* Now define a symbol for the cpu type, if your compiler
  60    does not define it automatically:
  61    Ones defined so far include vax, m68000, ns16000, pyramid,
  62    orion, tahoe, APOLLO and many others */
  63 #ifndef mips
  64 #       define mips
  65 #endif
  66
  67 /* Use type int rather than a union, to represent Lisp_Object */
  68 /* This is desirable for most machines.  */
  69
  70 #define NO_UNION_TYPE
  71
  72 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  73    the 24-bit bit field into an int.  In other words, if bit fields
  74    are always unsigned.
  75
  76    If you use NO_UNION_TYPE, this flag does not matter.  */
  77
  78 #define EXPLICIT_SIGN_EXTEND
  79
  80 /* Data type of load average, as read out of kmem.  */
  81
  82 #define LOAD_AVE_TYPE long
  83
  84 /* Convert that into an integer that is 100 for a load average of 1.0  */
  85
  86 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
  87
  88 /* CDC EP/IX 1.4.3 uses /unix */
  89
  90 #undef KERNEL_FILE
  91 #define KERNEL_FILE "/unix"
  92
  93 /* Define CANNOT_DUMP on machines where unexec does not work.
  94    Then the function dump-emacs will not be defined
  95    and temacs will do (load "loadup") automatically unless told otherwise.  */
  96
  97 #undef CANNOT_DUMP
  98
  99 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 100    pure and impure space as loaded can vary, and even their
 101    relative order cannot be relied on.
 102
 103    Otherwise Emacs assumes that text space precedes data space,
 104    numerically.  */
 105
 106 /* #define VIRT_ADDR_VARIES */
 107
 108 /* Define C_ALLOCA if this machine does not support a true alloca
 109    and the one written in C should be used instead.
 110    Define HAVE_ALLOCA to say that the system provides a properly
 111    working alloca function and it should be used.
 112    Define neither one if an assembler-language alloca
 113    in the file alloca.s should be used.  */
 114
 115 #ifdef __GNUC__
 116 #define HAVE_ALLOCA
 117 #else
 118 #define C_ALLOCA
 119 #endif
 120
 121 /* Define NO_REMAP if memory segmentation makes it not work well
 122    to change the boundary between the text section and data section
 123    when Emacs is dumped.  If you define this, the preloaded Lisp
 124    code will not be sharable; but that's better than failing completely.  */
 125
 126 #define NO_REMAP
 127
 128 /* This machine requires completely different unexec code
 129    which lives in a separate file.  Specify the file name.  */
 130
 131 #define UNEXEC unexmips.o
 132
 133 /* Describe layout of the address space in an executing process.  */
 134
 135 #define TEXT_START 0x400000
 136 #define DATA_START 0x800000
 137
 138 /* Alter some of the options used when linking.  */
 139
 140 #ifndef NEWSOS5
 141 #ifdef BSD
 142
 143 /* DECstations don't have this library.
 144    #define LIBS_MACHINE -lmld  */
 145
 146 #define LD_SWITCH_MACHINE -D 800000
 147 #define LIBS_DEBUG
 148
 149 #define LINKER /bsd43/bin/ld
 150
 151 #else /* not BSD */
 152
 153 #define LIBS_MACHINE -lmld
 154 #define LD_SWITCH_MACHINE -D 800000 -g3
 155 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 156 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 157 #define LIBS_TERMCAP -lcurses
 158
 159 #define C_SWITCH_MACHINE -I/usr/include/bsd
 160 #define C_DEBUG_SWITCH -O -g3
 161
 162 #if defined(HAVE_X_WINDOWS) && defined(HAVE_X11)
 163 #define HAVE_VFORK              /* Graciously provided by libX.a */
 164 #endif
 165
 166 #endif /* not BSD */
 167 #endif /* not NEWSOS5 */
 168 \f
 169 /* The standard definitions of these macros would work ok,
 170    but these are faster because the constants are short.  */
 171
 172 #define XUINT(a) (((unsigned)(a) << (INTBITS-VALBITS)) >> (INTBITS-VALBITS))
 173
 174 #define XSET(var, type, ptr)                                            \
 175   ((var) =                                                              \
 176    ((int)(type) << VALBITS)                                             \
 177    + (((unsigned) (ptr) << (INTBITS-VALBITS)) >> (INTBITS-VALBITS)))
 178
 179 #define XUNMARK(a)                                                      \
 180   ((a) =                                                                \
 181    (((unsigned)(a) << (INTBITS-GCTYPEBITS-VALBITS))                     \
 182     >> (INTBITS-GCTYPEBITS-VALBITS)))
 183 \f
 184 #ifndef NEWSOS5
 185 #ifdef USG
 186
 187 /* Cancel certain parts of standard sysV support.  */
 188 #undef NONSYSTEM_DIR_LIBRARY
 189 #define SYSV_SYSTEM_DIR
 190 #undef static
 191
 192 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 193 #undef SIGIO
 194 #define BROKEN_FIONREAD
 195
 196 /* Describe special kernel features.  */
 197
 198 #define HAVE_SYSVIPC
 199
 200 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
 201 #include <bsd/sys/time.h>
 202 #endif
 203
 204 /* The `select' in the system won't work for pipes, so don't use it.  */
 205 #undef HAVE_SELECT /* override configuration decision */
 206
 207 #define HAVE_GETWD
 208 #define HAVE_GETTIMEOFDAY
 209
 210 #define HAVE_PTYS
 211 #define HAVE_SOCKETS
 212
 213 #undef NOMULTIPLEJOBS
 214
 215 /* ??? */
 216 #define IRIS
 217
 218 #endif /* USG */
 219
 220 #ifdef BSD
 221 #define COFF
 222 #define TERMINFO
 223 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 224 #undef HAVE_UNION_WAIT
 225 #endif /* BSD */
 226
 227 #endif /* not NEWSOS5 */