src/m/mips.h

   1 /* m- file for Mips machines.
   2    Copyright (C) 1987, 1992, 1999 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 #ifndef __linux__
  83 #undef KERNEL_FILE
  84 #define KERNEL_FILE "/unix"
  85 #endif /* not __linux__ */
  86
  87 /* Define CANNOT_DUMP on machines where unexec does not work.
  88    Then the function dump-emacs will not be defined
  89    and temacs will do (load "loadup") automatically unless told otherwise.  */
  90
  91 #undef CANNOT_DUMP
  92
  93 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  94    pure and impure space as loaded can vary, and even their
  95    relative order cannot be relied on.
  96
  97    Otherwise Emacs assumes that text space precedes data space,
  98    numerically.  */
  99
 100 /* #define VIRT_ADDR_VARIES */
 101
 102 /* Define C_ALLOCA if this machine does not support a true alloca
 103    and the one written in C should be used instead.
 104    Define HAVE_ALLOCA to say that the system provides a properly
 105    working alloca function and it should be used.
 106    Define neither one if an assembler-language alloca
 107    in the file alloca.s should be used.  */
 108
 109 #ifdef __GNUC__
 110 #define HAVE_ALLOCA
 111 #else
 112 #define C_ALLOCA
 113 #endif
 114
 115 /* Define NO_REMAP if memory segmentation makes it not work well
 116    to change the boundary between the text section and data section
 117    when Emacs is dumped.  If you define this, the preloaded Lisp
 118    code will not be sharable; but that's better than failing completely.  */
 119
 120 #define NO_REMAP
 121
 122 /* This machine requires completely different unexec code
 123    which lives in a separate file.  Specify the file name.  */
 124
 125 #ifndef __linux__
 126 #undef UNEXEC
 127 #define UNEXEC unexmips.o
 128 #endif /* not __linux__ */
 129
 130 /* Describe layout of the address space in an executing process.  */
 131
 132 #ifdef __linux__
 133 #define TEXT_START      0x00400000
 134 #define DATA_START      0x10000000
 135 #define DATA_SEG_BITS   0x10000000
 136 #else /* not __linux__ */
 137 #define TEXT_START 0x400000
 138 #define DATA_START 0x800000
 139 #endif /* __linux__ */
 140
 141 /* Alter some of the options used when linking.  */
 142
 143 #if !defined(NEWSOS5) && !defined(__linux__)
 144 #ifdef BSD_SYSTEM
 145
 146 /* DECstations don't have this library.
 147    #define LIBS_MACHINE -lmld  */
 148
 149 #define LD_SWITCH_MACHINE -D 800000
 150 #define LIBS_DEBUG
 151
 152 #if defined (__NetBSD__) || defined (__OpenBSD__)
 153 #else  /* bsd with elf */
 154 #define LINKER /bsd43/bin/ld
 155 #endif /* bsd with elf */
 156 #else /* not BSD_SYSTEM */
 157
 158 #if defined(__GNUC__) && defined(_ABIN32)
 159 #define LIBS_MACHINE
 160 #else
 161 #define LIBS_MACHINE -lmld
 162 #endif
 163
 164 #define LD_SWITCH_MACHINE -D 800000 -g3
 165 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 166 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 167 #define LIBS_TERMCAP -lcurses
 168
 169 #define C_SWITCH_MACHINE -I/usr/include/bsd
 170 #define C_DEBUG_SWITCH -O -g3
 171
 172 #if defined(HAVE_X_WINDOWS) && defined(HAVE_X11)
 173 #define HAVE_VFORK              /* Graciously provided by libX.a */
 174 #endif
 175
 176 #endif /* not BSD_SYSTEM */
 177 #endif /* not NEWSOS5 && not __linux__ */
 178 \f
 179 /* The standard definitions of these macros would work ok,
 180    but these are faster because the constants are short.  */
 181
 182 #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
 183
 184 #define XSET(var, type, ptr)                                            \
 185   ((var) =                                                              \
 186    ((int)(type) << VALBITS)                                             \
 187    + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
 188
 189 #define XUNMARK(a)                                                      \
 190   ((a) =                                                                \
 191    (((unsigned)(a) << (BITS_PER_INT-GCTYPEBITS-VALBITS))                \
 192     >> (BITS_PER_INT-GCTYPEBITS-VALBITS)))
 193 \f
 194 #if !defined (NEWSOS5) && !defined (__linux__)
 195 #ifdef USG
 196
 197 /* Cancel certain parts of standard sysV support.  */
 198 #undef NONSYSTEM_DIR_LIBRARY
 199 #define SYSV_SYSTEM_DIR
 200 #undef static
 201
 202 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 203 #define BROKEN_SIGIO
 204 #define BROKEN_FIONREAD
 205
 206 /* Describe special kernel features.  */
 207
 208 #define HAVE_SYSVIPC
 209
 210 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
 211 #include <bsd/sys/time.h>
 212 #endif
 213
 214 /* The `select' in the system won't work for pipes, so don't use it.  */
 215 #undef HAVE_SELECT /* override configuration decision */
 216
 217 #define HAVE_PTYS
 218 #define HAVE_SOCKETS
 219
 220 #undef NOMULTIPLEJOBS
 221
 222 /* ??? */
 223 #define IRIS
 224
 225 #endif /* USG */
 226
 227 #ifdef BSD_SYSTEM
 228 #define COFF
 229 #define TERMINFO
 230 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 231 #undef HAVE_UNION_WAIT
 232 #endif /* BSD_SYSTEM */
 233
 234 #endif /* not NEWSOS5 && not __linux__ */