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 BIG_ENDIAN iff lowest-numbered byte in a word
  40    is the most significant byte.  */
  41
  42 #define 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 /* 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 #ifdef BSD
 136
 137 /* DECstations don't have this library.
 138    #define LIBS_MACHINE -lmld  */
 139
 140 #define LD_SWITCH_MACHINE -D 800000
 141 #define LIBS_DEBUG
 142
 143 #define LINKER /bsd43/bin/ld
 144
 145 #else /* not BSD */
 146 #ifdef NEWSOS5
 147
 148 #define LIBS_MACHINE -lmld
 149 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o
 150 #define LIB_STANDARD -lsocket -lnsl -lc /usr/ccs/lib/crtn.o /usr/ccs/lib/values-Xt.o
 151
 152 #ifdef __GNUC__
 153 #define C_DEBUG_SWITCH -g
 154 #define C_OPTIMIZE_SWITCH -g -O
 155 #define LD_SWITCH_MACHINE -g -Xlinker -D -Xlinker 800000
 156 #else
 157 #define C_DEBUG_SWITCH -g3
 158 #define C_OPTIMIZE_SWITCH -g3
 159 #define LD_SWITCH_MACHINE -g3 -D 800000
 160 #endif
 161
 162 #else /* not NEWSOS5 */
 163
 164 #define LIBS_MACHINE -lmld
 165 #define LD_SWITCH_MACHINE -D 800000 -g3
 166 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 167 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 168 #define LIBS_TERMCAP -lcurses
 169
 170 #define C_SWITCH_MACHINE -I/usr/include/bsd
 171 #define C_DEBUG_SWITCH -O -g3
 172
 173 #if defined(HAVE_X_WINDOWS) && defined(HAVE_X11)
 174 #define HAVE_VFORK              /* Graciously provided by libX.a */
 175 #endif
 176
 177 #endif /* not NEWSOS5 */
 178 #endif /* not BSD */
 179 \f
 180 /* The standard definitions of these macros would work ok,
 181    but these are faster because the constants are short.  */
 182
 183 #define XUINT(a) (((unsigned)(a) << (INTBITS-VALBITS)) >> (INTBITS-VALBITS))
 184
 185 #define XSET(var, type, ptr)                                            \
 186   ((var) =                                                              \
 187    ((int)(type) << VALBITS)                                             \
 188    + (((unsigned) (ptr) << (INTBITS-VALBITS)) >> (INTBITS-VALBITS)))
 189
 190 #define XSETINT(a, b)  XSET(a, XTYPE(a), b)
 191 #define XSETUINT(a, b) XSET(a, XTYPE(a), b)
 192 #define XSETPNTR(a, b) XSET(a, XTYPE(a), b)
 193
 194 #define XUNMARK(a)                                                      \
 195   ((a) =                                                                \
 196    (((unsigned)(a) << (INTBITS-GCTYPEBITS-VALBITS))                     \
 197     >> (INTBITS-GCTYPEBITS-VALBITS)))
 198 \f
 199 #ifndef NEWSOS5
 200 #ifdef USG
 201
 202 /* Cancel certain parts of standard sysV support.  */
 203 #undef NONSYSTEM_DIR_LIBRARY
 204 #define SYSV_SYSTEM_DIR
 205 #undef static
 206
 207 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 208 #undef SIGIO
 209 #define BROKEN_FIONREAD
 210
 211 /* Describe special kernel features.  */
 212
 213 #define HAVE_SYSVIPC
 214
 215 #define HAVE_TIMEVAL
 216 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
 217 #include <bsd/sys/time.h>
 218 #endif
 219
 220 /* #define HAVE_SELECT
 221    The `select' in the system won't work for pipes,
 222    so don't use it.  */
 223
 224 #define HAVE_DUP2
 225 #define HAVE_GETWD
 226 #define HAVE_GETTIMEOFDAY
 227
 228 #define HAVE_PTYS
 229 #define HAVE_SOCKETS
 230
 231 #undef NOMULTIPLEJOBS
 232 #define utimes utime  /* Someone should check this.  */
 233
 234 /* ??? */
 235 #define IRIS
 236
 237 #endif /* USG */
 238
 239 #ifdef BSD
 240 #define COFF
 241 #define TERMINFO
 242 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 243 #undef HAVE_UNION_WAIT
 244 #endif /* BSD */
 245
 246 #endif /* not NEWSOS5 */