src/m/masscomp.h

   1 /* machine description file for Masscomp 5000 series running RTU, ucb universe.
   2    Copyright (C) 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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  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="rtu"  */
  25
  26 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  27    is the most significant byte.  */
  28
  29 #define WORDS_BIG_ENDIAN
  30
  31 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  32  * group of arguments and treat it as an array of the arguments.  */
  33
  34 #undef NO_ARG_ARRAY
  35
  36 /* Define WORD_MACHINE if addresses and such have
  37  * to be corrected before they can be used as byte counts.  */
  38
  39 #undef WORD_MACHINE
  40
  41 /* Now define a symbol for the cpu type, if your compiler
  42    does not define it automatically:
  43    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  44    are the ones defined so far.  */
  45 /* Masscomp predefines mc68000. */
  46 #define m68000 mc68000
  47
  48 /* Use type int rather than a union, to represent Lisp_Object */
  49 /* This is desirable for most machines.  */
  50
  51 #define NO_UNION_TYPE
  52
  53 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  54    the 24-bit bit field into an int.  In other words, if bit fields
  55    are always unsigned.
  56
  57    If you use NO_UNION_TYPE, this flag does not matter.  */
  58
  59 #undef EXPLICIT_SIGN_EXTEND
  60
  61 /* Data type of load average, as read out of kmem.  */
  62
  63 #define LOAD_AVE_TYPE double
  64
  65 /* Convert that into an integer that is 100 for a load average of 1.0  */
  66
  67 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  68
  69 /* Define CANNOT_DUMP on machines where unexec does not work.
  70    Then the function dump-emacs will not be defined
  71    and temacs will do (load "loadup") automatically unless told otherwise.  */
  72
  73 #undef CANNOT_DUMP
  74
  75 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  76    pure and impure space as loaded can vary, and even their
  77    relative order cannot be relied on.
  78
  79    Otherwise Emacs assumes that text space precedes data space,
  80    numerically.  */
  81
  82 #undef VIRT_ADDR_VARIES
  83
  84 /* Define C_ALLOCA if this machine does not support a true alloca
  85    and the one written in C should be used instead.
  86    Define HAVE_ALLOCA to say that the system provides a properly
  87    working alloca function and it should be used.
  88    Define neither one if an assembler-language alloca
  89    in the file alloca.s should be used.  */
  90
  91 /* On return from a subroutine, the 68020 compiler restores old contents of
  92    register variables relative to sp, so alloca() screws up such routines.
  93    The following definitions should work on all Masscomps.  On the MC-5500
  94    (a 68000) one can #undef C_ALLOCA and #define HAVE_ALLOCA.  */
  95 #ifdef mc500
  96 #undef C_ALLOCA
  97 #define HAVE_ALLOCA
  98 #else
  99 #define C_ALLOCA
 100 #undef HAVE_ALLOCA
 101 #endif
 102
 103 /* Define NO_REMAP if memory segmentation makes it not work well
 104    to change the boundary between the text section and data section
 105    when Emacs is dumped.  If you define this, the preloaded Lisp
 106    code will not be sharable; but that's better than failing completely.  */
 107
 108 #undef NO_REMAP
 109
 110 /* crt0.c should use the vax-bsd style of entry, with a dummy arg.  */
 111
 112 #define CRT0_DUMMIES bogus_fp,
 113
 114 /* Name of file the to look in
 115    for the kernel symbol table (for load average) */
 116
 117 #define KERNEL_FILE "/unix"
 118
 119 /* This triggers some stuff to avoid a compiler bug */
 120
 121 #define MASSC_REGISTER_BUG
 122
 123 /* Prevent -lg from being used for debugging.  Not implemented?  */
 124
 125 #define LIBS_DEBUG
 126
 127 /*
 128  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
 129  *      for terminal control.
 130  */
 131
 132 #define HAVE_TERMIO
 133
 134 /* Adjust a header field for the executable file about to be dumped.  */
 135
 136 #define ADJUST_EXEC_HEADER   \
 137   hdr.a_stamp = STAMP13; /* really want the latest stamp, whatever it is */