src/m/mips.h

   1 /* m- file for Mips machines.
   2    Copyright (C) 1987, 1992, 1999, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007  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, or (at your option)
  10 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; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22
  23 /* The following line tells the configuration script what sort of
  24    operating system this machine is likely to run.
  25    USUAL-OPSYS="note"
  26
  27 NOTE-START
  28 Use mips4.h for RISCOS version 4; use s-bsd4-3.h with the BSD world.
  29 Note that the proper m file for the Decstation is pmax.h.
  30 NOTE-END  */
  31
  32 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  33    is the most significant byte.  */
  34
  35 #if ! (defined (__MIPSEL__) || defined (MIPSEL) || defined (_MIPSEL))
  36 #define WORDS_BIG_ENDIAN
  37 #endif
  38
  39 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  40  * group of arguments and treat it as an array of the arguments.  */
  41
  42 #define NO_ARG_ARRAY
  43
  44 /* Define WORD_MACHINE if addresses and such have
  45  * to be corrected before they can be used as byte counts.  */
  46
  47 #undef WORD_MACHINE
  48
  49 /* Define how to take a char and sign-extend into an int.
  50    On machines where char is signed, this is a no-op.  */
  51
  52 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  53
  54 /* Now define a symbol for the cpu type, if your compiler
  55    does not define it automatically:
  56    Ones defined so far include vax, m68000, ns16000, pyramid,
  57    orion, tahoe, APOLLO and many others */
  58 #ifndef mips
  59 #       define mips
  60 #endif
  61
  62 /* Use type int rather than a union, to represent Lisp_Object */
  63 /* This is desirable for most machines.  */
  64
  65 #define NO_UNION_TYPE
  66
  67 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  68    the 24-bit bit field into an int.  In other words, if bit fields
  69    are always unsigned.
  70
  71    If you use NO_UNION_TYPE, this flag does not matter.  */
  72
  73 #define EXPLICIT_SIGN_EXTEND
  74
  75 /* Data type of load average, as read out of kmem.  */
  76
  77 #define LOAD_AVE_TYPE long
  78
  79 /* Convert that into an integer that is 100 for a load average of 1.0  */
  80
  81 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
  82
  83 /* CDC EP/IX 1.4.3 uses /unix */
  84
  85 #ifndef __linux__
  86 #undef KERNEL_FILE
  87 #define KERNEL_FILE "/unix"
  88 #endif /* not __linux__ */
  89
  90 /* Define CANNOT_DUMP on machines where unexec does not work.
  91    Then the function dump-emacs will not be defined
  92    and temacs will do (load "loadup") automatically unless told otherwise.  */
  93
  94 #undef CANNOT_DUMP
  95
  96 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  97    pure and impure space as loaded can vary, and even their
  98    relative order cannot be relied on.
  99
 100    Otherwise Emacs assumes that text space precedes data space,
 101    numerically.  */
 102
 103 /* #define VIRT_ADDR_VARIES */
 104
 105 /* Define NO_REMAP if memory segmentation makes it not work well
 106    to change the boundary between the text section and data section
 107    when Emacs is dumped.  If you define this, the preloaded Lisp
 108    code will not be sharable; but that's better than failing completely.  */
 109
 110 #define NO_REMAP
 111
 112 /* This machine requires completely different unexec code
 113    which lives in a separate file.  Specify the file name.  */
 114
 115 #if !defined(__linux__) && !defined(__NetBSD__)
 116 #undef UNEXEC
 117 #define UNEXEC unexmips.o
 118 #endif /* not __linux__ && not __NetBSD__ */
 119
 120 /* Describe layout of the address space in an executing process.  */
 121
 122 #ifdef __linux__
 123 #define TEXT_START      0x00400000
 124 #define DATA_START      0x10000000
 125 #define DATA_SEG_BITS   0x10000000
 126 #else /* not __linux__ */
 127 #define TEXT_START 0x400000
 128 #define DATA_START 0x800000
 129 #endif /* __linux__ */
 130
 131 /* Alter some of the options used when linking.  */
 132
 133 #if !defined(NEWSOS5) && !defined(__linux__)
 134 #ifdef BSD_SYSTEM
 135
 136 /* DECstations don't have this library.
 137    #define LIBS_MACHINE -lmld  */
 138
 139 #define LD_SWITCH_MACHINE -D 800000
 140 #define LIBS_DEBUG
 141
 142 #if defined (__NetBSD__) || defined (__OpenBSD__)
 143 #else  /* bsd with elf */
 144 #define LINKER /bsd43/bin/ld
 145
 146 #define LD_SWITCH_MACHINE -D 800000 -g3
 147 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 148 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 149 #define LIBS_TERMCAP -lcurses
 150
 151 #define C_SWITCH_MACHINE -I/usr/include/bsd
 152 #define C_DEBUG_SWITCH -O -g3
 153
 154 #endif /* bsd with elf */
 155 #else /* not BSD_SYSTEM */
 156
 157 #if defined(__GNUC__) && defined(_ABIN32)
 158 #define LIBS_MACHINE
 159 #else
 160 #define LIBS_MACHINE -lmld
 161 #endif
 162
 163 #endif /* not BSD_SYSTEM */
 164 #endif /* not NEWSOS5 && not __linux__ */
 165 \f
 166 /* The standard definitions of these macros would work ok,
 167    but these are faster because the constants are short.  */
 168
 169 #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
 170
 171 #define XSET(var, type, ptr)                                            \
 172   ((var) =                                                              \
 173    ((int)(type) << VALBITS)                                             \
 174    + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
 175 \f
 176 #if !defined (NEWSOS5) && !defined (__linux__)
 177 #ifdef USG
 178
 179 /* Cancel certain parts of standard sysV support.  */
 180 #undef NONSYSTEM_DIR_LIBRARY
 181 #define SYSV_SYSTEM_DIR
 182 #undef static
 183
 184 /* Don't try to use SIGIO or FIONREAD even though they are defined.  */
 185 #define BROKEN_SIGIO
 186 #define BROKEN_FIONREAD
 187
 188 /* Describe special kernel features.  */
 189
 190 #define HAVE_SYSVIPC
 191
 192 #if defined(emacs) && !defined(INHIBIT_BSD_TIME)
 193 #include <bsd/sys/time.h>
 194 #endif
 195
 196 /* The `select' in the system won't work for pipes, so don't use it.  */
 197 #undef HAVE_SELECT /* override configuration decision */
 198
 199 #define HAVE_PTYS
 200 #define HAVE_SOCKETS
 201
 202 #undef NOMULTIPLEJOBS
 203
 204 /* ??? */
 205 #define IRIS
 206
 207 #endif /* USG */
 208
 209 #ifdef BSD_SYSTEM
 210 #define COFF
 211 #define TERMINFO
 212 #undef MAIL_USE_FLOCK  /* Someone should check this.  */
 213 #undef HAVE_UNION_WAIT
 214 #endif /* BSD_SYSTEM */
 215
 216 #endif /* not NEWSOS5 && not __linux__ */
 217
 218 /* arch-tag: 8fd020ee-78a7-4d87-96ce-6129f52f7bee
 219    (do not change this comment) */