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