src/m/mips.h

   1 /* m- file for Mips machines.
   2    Copyright (C) 1987, 1992, 1999, 2001, 2002, 2003, 2004, 2005, 2006,
   3                  2007, 2008  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  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 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 pmax.h.
  28 NOTE-END  */
  29
  30 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  31    is the most significant byte.  */
  32
  33 #if ! (defined (__MIPSEL__) || defined (MIPSEL) || defined (_MIPSEL))
  34 #define WORDS_BIG_ENDIAN
  35 #endif
  36
  37 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  38  * group of arguments and treat it as an array of the arguments.  */
  39
  40 #define NO_ARG_ARRAY
  41
  42 /* Define how to take a char and sign-extend into an int.
  43    On machines where char is signed, this is a no-op.  */
  44
  45 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  46
  47 /* Now define a symbol for the cpu type, if your compiler
  48    does not define it automatically:
  49    Ones defined so far include vax, m68000, ns16000, pyramid,
  50    orion, tahoe, APOLLO and many others */
  51 #ifndef mips
  52 #       define mips
  53 #endif
  54
  55 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  56    the 24-bit bit field into an int.  In other words, if bit fields
  57    are always unsigned.
  58
  59    This flag only matters if you use USE_LISP_UNION_TYPE.  */
  60
  61 #define EXPLICIT_SIGN_EXTEND
  62
  63 /* Data type of load average, as read out of kmem.  */
  64
  65 #define LOAD_AVE_TYPE long
  66
  67 /* Convert that into an integer that is 100 for a load average of 1.0  */
  68
  69 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
  70
  71 /* CDC EP/IX 1.4.3 uses /unix */
  72
  73 #ifndef __linux__
  74 #undef KERNEL_FILE
  75 #define KERNEL_FILE "/unix"
  76 #endif /* not __linux__ */
  77
  78 /* Define CANNOT_DUMP on machines where unexec does not work.
  79    Then the function dump-emacs will not be defined
  80    and temacs will do (load "loadup") automatically unless told otherwise.  */
  81
  82 #undef CANNOT_DUMP
  83
  84 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  85    pure and impure space as loaded can vary, and even their
  86    relative order cannot be relied on.
  87
  88    Otherwise Emacs assumes that text space precedes data space,
  89    numerically.  */
  90
  91 /* #define VIRT_ADDR_VARIES */
  92
  93 /* Define NO_REMAP if memory segmentation makes it not work well
  94    to change the boundary between the text section and data section
  95    when Emacs is dumped.  If you define this, the preloaded Lisp
  96    code will not be sharable; but that's better than failing completely.  */
  97
  98 #define NO_REMAP
  99
 100 /* This machine requires completely different unexec code
 101    which lives in a separate file.  Specify the file name.  */
 102
 103 #if !defined(__linux__) && !defined(__NetBSD__)
 104 #undef UNEXEC
 105 #define UNEXEC unexmips.o
 106 #endif /* not __linux__ && not __NetBSD__ */
 107
 108 /* Describe layout of the address space in an executing process.  */
 109
 110 #ifdef __linux__
 111 #define TEXT_START      0x00400000
 112 #define DATA_START      0x10000000
 113 #define DATA_SEG_BITS   0x10000000
 114 #else /* not __linux__ */
 115 #define TEXT_START 0x400000
 116 #define DATA_START 0x800000
 117 #endif /* __linux__ */
 118
 119 /* Alter some of the options used when linking.  */
 120
 121 #if !defined(__linux__)
 122 #ifdef BSD_SYSTEM
 123
 124 /* DECstations don't have this library.
 125    #define LIBS_MACHINE -lmld  */
 126
 127 #define LD_SWITCH_MACHINE -D 800000
 128 #define LIBS_DEBUG
 129
 130 #if defined (__NetBSD__) || defined (__OpenBSD__)
 131 #else  /* bsd with elf */
 132 #define LINKER /bsd43/bin/ld
 133
 134 #define LD_SWITCH_MACHINE -D 800000 -g3
 135 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 136 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 137 #define LIBS_TERMCAP -lcurses
 138
 139 #define C_SWITCH_MACHINE -I/usr/include/bsd
 140 #define C_DEBUG_SWITCH -O -g3
 141
 142 #endif /* bsd with elf */
 143 #else /* not BSD_SYSTEM */
 144
 145 #if defined(__GNUC__) && defined(_ABIN32)
 146 #define LIBS_MACHINE
 147 #else
 148 #define LIBS_MACHINE -lmld
 149 #endif
 150
 151 #endif /* not BSD_SYSTEM */
 152 #endif /* not __linux__ */
 153 \f
 154 /* The standard definitions of these macros would work ok,
 155    but these are faster because the constants are short.  */
 156
 157 #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
 158
 159 #define XSET(var, type, ptr)                                            \
 160   ((var) =                                                              \
 161    ((int)(type) << VALBITS)                                             \
 162    + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
 163 \f
 164 #if !defined (__linux__)
 165 #ifdef USG
 166
 167 /* Cancel certain parts of standard sysV support.  */
 168 #undef NONSYSTEM_DIR_LIBRARY
 169 #define SYSV_SYSTEM_DIR
 170 #undef static
 171
 172 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 173 #define BROKEN_SIGIO
 174 #define BROKEN_FIONREAD
 175
 176 /* Describe special kernel features.  */
 177
 178 #define HAVE_SYSVIPC
 179
 180 #if defined(emacs)
 181 #include <bsd/sys/time.h>
 182 #endif
 183
 184 /* The `select' in the system won't work for pipes, so don't use it.  */
 185 #undef HAVE_SELECT /* override configuration decision */
 186
 187 #define HAVE_PTYS
 188 #define HAVE_SOCKETS
 189
 190 #undef NOMULTIPLEJOBS
 191
 192 /* ??? */
 193 #define IRIS
 194
 195 #endif /* USG */
 196
 197 #ifdef BSD_SYSTEM
 198 #define COFF
 199 #define TERMINFO
 200 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 201 #endif /* BSD_SYSTEM */
 202
 203 #endif /* not __linux__ */
 204
 205 /* arch-tag: 8fd020ee-78a7-4d87-96ce-6129f52f7bee
 206    (do not change this comment) */