src/m/isi-ov.h

   1 /* machine description file for ISI 68000's
   2    Copyright (C) 1985, 1986, 2002, 2003, 2004,
   3                  2005 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 2, 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 `-opsystem=bsd4-2' or `-opsystem=bsd4-3'.
  29 NOTE-END */
  30
  31 #define ISI68K
  32
  33 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  34    is the most significant byte.  */
  35
  36 #define WORDS_BIG_ENDIAN
  37
  38 /* Say this machine is a 68000 */
  39
  40 #define m68000
  41
  42 /* Use type int rather than a union, to represent Lisp_Object */
  43
  44 #define NO_UNION_TYPE
  45
  46 /* XINT must explicitly sign-extend */
  47
  48 #define EXPLICIT_SIGN_EXTEND
  49
  50 /* Data type of load average, as read out of kmem.  */
  51
  52 #ifdef BSD4_3
  53 #define LOAD_AVE_TYPE long
  54 #else
  55 #define LOAD_AVE_TYPE double
  56 #endif BSD4_3
  57
  58 /* Convert that into an integer that is 100 for a load average of 1.0  */
  59
  60 #ifdef BSD4_3
  61 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  62 #else
  63 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  64 #endif
  65
  66 /* Mask for address bits within a memory segment */
  67
  68 #define SEGMENT_MASK 0x1ffff
  69
  70 /* use the -20 switch to get the 68020 code */
  71 /* #define C_SWITCH_MACHINE -20 */
  72
  73 /* Use the version of the library for the 68020
  74    because the standard library requires some special hacks in crt0
  75    which the GNU crt0 does not have.  */
  76
  77 #define LIB_STANDARD -lmc
  78
  79 /* macros to make unexec work right */
  80
  81 #define A_TEXT_OFFSET(HDR) sizeof(HDR)
  82 #define A_TEXT_SEEK(HDR) sizeof(HDR)
  83
  84 /* A few changes for the newer systems.  */
  85
  86 #ifdef BSD4_3
  87 /* The following line affects crt0.c.  */
  88 #undef m68k
  89
  90 #undef LIB_STANDARD
  91 #define LIB_STANDARD -lmc -lc
  92 #define C_DEBUG_SWITCH -20 -O -X23
  93 #endif
  94
  95 /* arch-tag: 3bfb5a11-d94e-4372-923b-9f47d0851f42
  96    (do not change this comment) */