src/m/ns32000.h

   1 /* machine description file for National Semiconductor 32000, running Genix.
   2    Copyright (C) 1985, 1986 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 2, 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
  22 /* The following line tells the configuration script what sort of
  23    operating system this machine is likely to run.
  24    USUAL-OPSYS="usg5-2"  */
  25
  26 /* The following three symbols give information on
  27  the size of various data types.  */
  28
  29 #define SHORTBITS 16            /* Number of bits in a short */
  30
  31 #define INTBITS 32              /* Number of bits in an int */
  32
  33 #define LONGBITS 32             /* Number of bits in a long */
  34
  35 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  36    is the most significant byte.  */
  37
  38 /* #define BIG_ENDIAN */
  39
  40 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  41  * group of arguments and treat it as an array of the arguments.  */
  42
  43 /* #define NO_ARG_ARRAY */
  44
  45 /* Define WORD_MACHINE if addresses and such have
  46  * to be corrected before they can be used as byte counts.  */
  47
  48 /* #define WORD_MACHINE */
  49
  50 /* Now define a symbol for the cpu type, if your compiler
  51    does not define it automatically:
  52    Ones defined so far include vax, m68000, ns16000, pyramid,
  53    orion, tahoe, APOLLO and many others */
  54
  55 /* Use type int rather than a union, to represent Lisp_Object */
  56 /* This is desirable for most machines.  */
  57
  58 #define NO_UNION_TYPE
  59
  60 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  61    the 24-bit bit field into an int.  In other words, if bit fields
  62    are always unsigned.
  63
  64    If you use NO_UNION_TYPE, this flag does not matter.  */
  65
  66 #define EXPLICIT_SIGN_EXTEND
  67
  68 /* Data type of load average, as read out of kmem.  */
  69
  70 /* #define LOAD_AVE_TYPE long */
  71
  72 /* Convert that into an integer that is 100 for a load average of 1.0  */
  73
  74 /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
  75
  76 /* Define CANNOT_DUMP on machines where unexec does not work.
  77    Then the function dump-emacs will not be defined
  78    and temacs will do (load "loadup") automatically unless told otherwise.  */
  79
  80 /* #define CANNOT_DUMP */
  81
  82 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  83    pure and impure space as loaded can vary, and even their
  84    relative order cannot be relied on.
  85
  86    Otherwise Emacs assumes that text space precedes data space,
  87    numerically.  */
  88
  89 /* #define VIRT_ADDR_VARIES */
  90
  91 /* Define C_ALLOCA if this machine does not support a true alloca
  92    and the one written in C should be used instead.
  93    Define HAVE_ALLOCA to say that the system provides a properly
  94    working alloca function and it should be used.
  95    Define neither one if an assembler-language alloca
  96    in the file alloca.s should be used.  */
  97
  98 /* #define C_ALLOCA */
  99 /* #define HAVE_ALLOCA */
 100
 101 /* Define NO_REMAP if memory segmentation makes it not work well
 102    to change the boundary between the text section and data section
 103    when Emacs is dumped.  If you define this, the preloaded Lisp
 104    code will not be sharable; but that's better than failing completely.  */
 105
 106 /* #define NO_REMAP */
 107
 108 #define TEXT_START 0
 109
 110 #define STACK_DIRECTION -1
 111
 112 #define EXEC_MAGIC 0410
 113
 114 #define PURESIZE 140000
 115
 116 #define START_FILES pre-crt0.o /lib/crt0.o