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 WORD_MACHINE if addresses and such have
  43  * to be corrected before they can be used as byte counts.  */
  44
  45 #undef WORD_MACHINE
  46
  47 /* Define how to take a char and sign-extend into an int.
  48    On machines where char is signed, this is a no-op.  */
  49
  50 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  51
  52 /* Now define a symbol for the cpu type, if your compiler
  53    does not define it automatically:
  54    Ones defined so far include vax, m68000, ns16000, pyramid,
  55    orion, tahoe, APOLLO and many others */
  56 #ifndef mips
  57 #       define mips
  58 #endif
  59
  60 /* Use type int rather than a union, to represent Lisp_Object */
  61 /* This is desirable for most machines.  */
  62
  63 #define NO_UNION_TYPE
  64
  65 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  66    the 24-bit bit field into an int.  In other words, if bit fields
  67    are always unsigned.
  68
  69    If you use NO_UNION_TYPE, this flag does not matter.  */
  70
  71 #define EXPLICIT_SIGN_EXTEND
  72
  73 /* Data type of load average, as read out of kmem.  */
  74
  75 #define LOAD_AVE_TYPE long
  76
  77 /* Convert that into an integer that is 100 for a load average of 1.0  */
  78
  79 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
  80
  81 /* CDC EP/IX 1.4.3 uses /unix */
  82
  83 #ifndef __linux__
  84 #undef KERNEL_FILE
  85 #define KERNEL_FILE "/unix"
  86 #endif /* not __linux__ */
  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 NO_REMAP if memory segmentation makes it not work well
 104    to change the boundary between the text section and data section
 105    when Emacs is dumped.  If you define this, the preloaded Lisp
 106    code will not be sharable; but that's better than failing completely.  */
 107
 108 #define NO_REMAP
 109
 110 /* This machine requires completely different unexec code
 111    which lives in a separate file.  Specify the file name.  */
 112
 113 #if !defined(__linux__) && !defined(__NetBSD__)
 114 #undef UNEXEC
 115 #define UNEXEC unexmips.o
 116 #endif /* not __linux__ && not __NetBSD__ */
 117
 118 /* Describe layout of the address space in an executing process.  */
 119
 120 #ifdef __linux__
 121 #define TEXT_START      0x00400000
 122 #define DATA_START      0x10000000
 123 #define DATA_SEG_BITS   0x10000000
 124 #else /* not __linux__ */
 125 #define TEXT_START 0x400000
 126 #define DATA_START 0x800000
 127 #endif /* __linux__ */
 128
 129 /* Alter some of the options used when linking.  */
 130
 131 #if !defined(__linux__)
 132 #ifdef BSD_SYSTEM
 133
 134 /* DECstations don't have this library.
 135    #define LIBS_MACHINE -lmld  */
 136
 137 #define LD_SWITCH_MACHINE -D 800000
 138 #define LIBS_DEBUG
 139
 140 #if defined (__NetBSD__) || defined (__OpenBSD__)
 141 #else  /* bsd with elf */
 142 #define LINKER /bsd43/bin/ld
 143
 144 #define LD_SWITCH_MACHINE -D 800000 -g3
 145 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 146 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 147 #define LIBS_TERMCAP -lcurses
 148
 149 #define C_SWITCH_MACHINE -I/usr/include/bsd
 150 #define C_DEBUG_SWITCH -O -g3
 151
 152 #endif /* bsd with elf */
 153 #else /* not BSD_SYSTEM */
 154
 155 #if defined(__GNUC__) && defined(_ABIN32)
 156 #define LIBS_MACHINE
 157 #else
 158 #define LIBS_MACHINE -lmld
 159 #endif
 160
 161 #endif /* not BSD_SYSTEM */
 162 #endif /* 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 \f
 174 #if !defined (__linux__)
 175 #ifdef USG
 176
 177 /* Cancel certain parts of standard sysV support.  */
 178 #undef NONSYSTEM_DIR_LIBRARY
 179 #define SYSV_SYSTEM_DIR
 180 #undef static
 181
 182 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 183 #define BROKEN_SIGIO
 184 #define BROKEN_FIONREAD
 185
 186 /* Describe special kernel features.  */
 187
 188 #define HAVE_SYSVIPC
 189
 190 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
 191 #include <bsd/sys/time.h>
 192 #endif
 193
 194 /* The `select' in the system won't work for pipes, so don't use it.  */
 195 #undef HAVE_SELECT /* override configuration decision */
 196
 197 #define HAVE_PTYS
 198 #define HAVE_SOCKETS
 199
 200 #undef NOMULTIPLEJOBS
 201
 202 /* ??? */
 203 #define IRIS
 204
 205 #endif /* USG */
 206
 207 #ifdef BSD_SYSTEM
 208 #define COFF
 209 #define TERMINFO
 210 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 211 #undef HAVE_UNION_WAIT
 212 #endif /* BSD_SYSTEM */
 213
 214 #endif /* not __linux__ */
 215
 216 /* arch-tag: 8fd020ee-78a7-4d87-96ce-6129f52f7bee
 217    (do not change this comment) */