src/m/mips.h

   1 /* m- file for Mips machines.
   2    Copyright (C) 1987, 1992, 1999, 2002 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 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 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 #if ! (defined (__MIPSEL__) || defined (MIPSEL) || defined (_MIPSEL))
  35 #define WORDS_BIG_ENDIAN
  36 #endif
  37
  38 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  39  * group of arguments and treat it as an array of the arguments.  */
  40
  41 #define NO_ARG_ARRAY
  42
  43 /* Define WORD_MACHINE if addresses and such have
  44  * to be corrected before they can be used as byte counts.  */
  45
  46 #undef WORD_MACHINE
  47
  48 /* Define how to take a char and sign-extend into an int.
  49    On machines where char is signed, this is a no-op.  */
  50
  51 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  52
  53 /* Now define a symbol for the cpu type, if your compiler
  54    does not define it automatically:
  55    Ones defined so far include vax, m68000, ns16000, pyramid,
  56    orion, tahoe, APOLLO and many others */
  57 #ifndef mips
  58 #       define mips
  59 #endif
  60
  61 /* Use type int rather than a union, to represent Lisp_Object */
  62 /* This is desirable for most machines.  */
  63
  64 #define NO_UNION_TYPE
  65
  66 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  67    the 24-bit bit field into an int.  In other words, if bit fields
  68    are always unsigned.
  69
  70    If you use NO_UNION_TYPE, this flag does not matter.  */
  71
  72 #define EXPLICIT_SIGN_EXTEND
  73
  74 /* Data type of load average, as read out of kmem.  */
  75
  76 #define LOAD_AVE_TYPE long
  77
  78 /* Convert that into an integer that is 100 for a load average of 1.0  */
  79
  80 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
  81
  82 /* CDC EP/IX 1.4.3 uses /unix */
  83
  84 #ifndef __linux__
  85 #undef KERNEL_FILE
  86 #define KERNEL_FILE "/unix"
  87 #endif /* not __linux__ */
  88
  89 /* Define CANNOT_DUMP on machines where unexec does not work.
  90    Then the function dump-emacs will not be defined
  91    and temacs will do (load "loadup") automatically unless told otherwise.  */
  92
  93 #undef CANNOT_DUMP
  94
  95 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  96    pure and impure space as loaded can vary, and even their
  97    relative order cannot be relied on.
  98
  99    Otherwise Emacs assumes that text space precedes data space,
 100    numerically.  */
 101
 102 /* #define VIRT_ADDR_VARIES */
 103
 104 /* Define NO_REMAP if memory segmentation makes it not work well
 105    to change the boundary between the text section and data section
 106    when Emacs is dumped.  If you define this, the preloaded Lisp
 107    code will not be sharable; but that's better than failing completely.  */
 108
 109 #define NO_REMAP
 110
 111 /* This machine requires completely different unexec code
 112    which lives in a separate file.  Specify the file name.  */
 113
 114 #ifndef __linux__
 115 #undef UNEXEC
 116 #define UNEXEC unexmips.o
 117 #endif /* not __linux__ */
 118
 119 /* Describe layout of the address space in an executing process.  */
 120
 121 #ifdef __linux__
 122 #define TEXT_START      0x00400000
 123 #define DATA_START      0x10000000
 124 #define DATA_SEG_BITS   0x10000000
 125 #else /* not __linux__ */
 126 #define TEXT_START 0x400000
 127 #define DATA_START 0x800000
 128 #endif /* __linux__ */
 129
 130 /* Alter some of the options used when linking.  */
 131
 132 #if !defined(NEWSOS5) && !defined(__linux__)
 133 #ifdef BSD_SYSTEM
 134
 135 /* DECstations don't have this library.
 136    #define LIBS_MACHINE -lmld  */
 137
 138 #define LD_SWITCH_MACHINE -D 800000
 139 #define LIBS_DEBUG
 140
 141 #if defined (__NetBSD__) || defined (__OpenBSD__)
 142 #else  /* bsd with elf */
 143 #define LINKER /bsd43/bin/ld
 144 #endif /* bsd with elf */
 145 #else /* not BSD_SYSTEM */
 146
 147 #if defined(__GNUC__) && defined(_ABIN32)
 148 #define LIBS_MACHINE
 149 #else
 150 #define LIBS_MACHINE -lmld
 151 #endif
 152
 153 #define LD_SWITCH_MACHINE -D 800000 -g3
 154 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 155 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 156 #define LIBS_TERMCAP -lcurses
 157
 158 #define C_SWITCH_MACHINE -I/usr/include/bsd
 159 #define C_DEBUG_SWITCH -O -g3
 160
 161 #endif /* not BSD_SYSTEM */
 162 #endif /* not NEWSOS5 && not __linux__ */
 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) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
 168
 169 #define XSET(var, type, ptr)                                            \
 170   ((var) =                                                              \
 171    ((int)(type) << VALBITS)                                             \
 172    + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
 173
 174 #define XUNMARK(a)                                                      \
 175   ((a) =                                                                \
 176    (((unsigned)(a) << (BITS_PER_INT-GCTYPEBITS-VALBITS))                \
 177     >> (BITS_PER_INT-GCTYPEBITS-VALBITS)))
 178 \f
 179 #if !defined (NEWSOS5) && !defined (__linux__)
 180 #ifdef USG
 181
 182 /* Cancel certain parts of standard sysV support.  */
 183 #undef NONSYSTEM_DIR_LIBRARY
 184 #define SYSV_SYSTEM_DIR
 185 #undef static
 186
 187 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 188 #define BROKEN_SIGIO
 189 #define BROKEN_FIONREAD
 190
 191 /* Describe special kernel features.  */
 192
 193 #define HAVE_SYSVIPC
 194
 195 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
 196 #include <bsd/sys/time.h>
 197 #endif
 198
 199 /* The `select' in the system won't work for pipes, so don't use it.  */
 200 #undef HAVE_SELECT /* override configuration decision */
 201
 202 #define HAVE_PTYS
 203 #define HAVE_SOCKETS
 204
 205 #undef NOMULTIPLEJOBS
 206
 207 /* ??? */
 208 #define IRIS
 209
 210 #endif /* USG */
 211
 212 #ifdef BSD_SYSTEM
 213 #define COFF
 214 #define TERMINFO
 215 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 216 #undef HAVE_UNION_WAIT
 217 #endif /* BSD_SYSTEM */
 218
 219 #endif /* not NEWSOS5 && not __linux__ */