src/m/tek4300.h

   1 /* machine description file for tek4300.
   2    Copyright (C) 1988 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 1, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  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="bsd4-3"  */
  24
  25 /* The following three symbols give information on
  26  the size of various data types.  */
  27
  28 #define SHORTBITS 16            /* Number of bits in a short */
  29
  30 #define INTBITS 32              /* Number of bits in an int */
  31
  32 #define LONGBITS 32             /* Number of bits in a long */
  33
  34 /* 68000 has lowest-numbered byte as most significant */
  35
  36 #define BIG_ENDIAN
  37
  38 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  39  * group of arguments and treat it as an array of the arguments.  */
  40
  41 #undef NO_ARG_ARRAY
  42
  43 /* Define WORD_MACHINE if addresses and such have
  44  * to be corrected before they can be used as byte counts.  */
  45
  46 #undef WORD_MACHINE
  47
  48 /* Now define a symbol for the cpu type, if your compiler
  49    does not define it automatically.  */
  50
  51 #define tek4300
  52
  53 /* Use type int rather than a union, to represent Lisp_Object */
  54
  55 #define NO_UNION_TYPE
  56
  57 /* Data type of load average, as read out of kmem.  */
  58
  59 #define LOAD_AVE_TYPE long
  60
  61 /* Convert that into an integer that is 100 for a load average of 1.0  */
  62
  63 #define LOAD_AVE_CVT(x) (x)
  64
  65 /* Define NO_REMAP if memory segmentation makes it not work well
  66    to change the boundary between the text section and data section
  67    when Emacs is dumped.  If you define this, the preloaded Lisp
  68    code will not be sharable; but that's better than failing completely.  */
  69
  70 #define NO_REMAP
  71
  72 /* Define C_ALLOCA if this machine does not support a true alloca
  73    and the one written in C should be used instead. */
  74
  75 #define C_ALLOCA
  76
  77 /* setjmp and longjmp can safely replace _setjmp and _longjmp, */
  78
  79 #define _longjmp longjmp
  80 #define _setjmp setjmp
  81
  82 /* The text segment always starts at a fixed address.
  83    This way we don't need to have a label _start defined.  */
  84
  85 #define TEXT_START 0
  86
  87 /* The Tektronix exec struct for ZMAGIC files is struct zexec */
  88
  89 #define EXEC_HDR_TYPE struct zexec
  90
  91 /* The entry-point label (start of text segment) is `start', not `__start'.  */
  92
  93 #define DEFAULT_ENTRY_ADDRESS start