src/m/m68k.h

   1 /* Machine description file for generic Motorola 68k.
   2    Copyright (C) 1985, 1995, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  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 three symbols give information on
  22  the size of various data types.  */
  23
  24
  25 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  26    is the most significant byte.  */
  27
  28 #define WORDS_BIG_ENDIAN
  29
  30 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  31  * group of arguments and treat it as an array of the arguments.  */
  32
  33 /* #define NO_ARG_ARRAY */
  34
  35 /* Define WORD_MACHINE if addresses and such have
  36  * to be corrected before they can be used as byte counts.  */
  37
  38 /* #define WORD_MACHINE */
  39
  40 /* Now define a symbol for the cpu type, if your compiler
  41    does not define it automatically.  */
  42
  43 #ifndef m68k
  44 #define m68k
  45 #endif
  46
  47 /* Use type int rather than a union, to represent Lisp_Object */
  48 /* This is desirable for most machines.  */
  49
  50 #define NO_UNION_TYPE
  51
  52 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  53    the 24-bit bit field into an int.  In other words, if bit fields
  54    are always unsigned.
  55
  56    If you use NO_UNION_TYPE, this flag does not matter.  */
  57
  58 #define EXPLICIT_SIGN_EXTEND
  59
  60 /* Define CANNOT_DUMP on machines where unexec does not work.
  61    Then the function dump-emacs will not be defined
  62    and temacs will do (load "loadup") automatically unless told otherwise.  */
  63
  64 /* #define CANNOT_DUMP */
  65
  66 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  67    pure and impure space as loaded can vary, and even their
  68    relative order cannot be relied on.
  69
  70    Otherwise Emacs assumes that text space precedes data space,
  71    numerically.  */
  72
  73 /* #define VIRT_ADDR_VARIES */
  74
  75 #ifdef linux
  76 #ifdef __ELF__
  77 #define DATA_SEG_BITS 0x80000000
  78 #endif
  79
  80 #define NO_REMAP
  81 #define TEXT_START 0
  82 #endif
  83
  84 /* arch-tag: 4eadd161-b4e8-4b82-82a1-e4ce7f42969d
  85    (do not change this comment) */