src/m/m68k.h

   1 /* Machine description file for generic Motorola 68k.
   2    Copyright (C) 1985, 1995, 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 three symbols give information on
  24  the size of various data types.  */
  25
  26
  27 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  28    is the most significant byte.  */
  29
  30 #define WORDS_BIG_ENDIAN
  31
  32 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  33  * group of arguments and treat it as an array of the arguments.  */
  34
  35 /* #define NO_ARG_ARRAY */
  36
  37 /* Define WORD_MACHINE if addresses and such have
  38  * to be corrected before they can be used as byte counts.  */
  39
  40 /* #define WORD_MACHINE */
  41
  42 /* Now define a symbol for the cpu type, if your compiler
  43    does not define it automatically.  */
  44
  45 #ifndef m68k
  46 #define m68k
  47 #endif
  48
  49 /* Use type int rather than a union, to represent Lisp_Object */
  50 /* This is desirable for most machines.  */
  51
  52 #define NO_UNION_TYPE
  53
  54 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  55    the 24-bit bit field into an int.  In other words, if bit fields
  56    are always unsigned.
  57
  58    If you use NO_UNION_TYPE, this flag does not matter.  */
  59
  60 #define EXPLICIT_SIGN_EXTEND
  61
  62 /* Define CANNOT_DUMP on machines where unexec does not work.
  63    Then the function dump-emacs will not be defined
  64    and temacs will do (load "loadup") automatically unless told otherwise.  */
  65
  66 /* #define CANNOT_DUMP */
  67
  68 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  69    pure and impure space as loaded can vary, and even their
  70    relative order cannot be relied on.
  71
  72    Otherwise Emacs assumes that text space precedes data space,
  73    numerically.  */
  74
  75 /* #define VIRT_ADDR_VARIES */
  76
  77 #ifdef linux
  78 #ifdef __ELF__
  79 #define DATA_SEG_BITS 0x80000000
  80 #endif
  81
  82 #define NO_REMAP
  83 #define TEXT_START 0
  84 #endif
  85
  86 /* arch-tag: 4eadd161-b4e8-4b82-82a1-e4ce7f42969d
  87    (do not change this comment) */