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 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="rtu"  */
  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 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  35    is the most significant byte.  */
  36
  37 #define BIG_ENDIAN
  38
  39 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  40  * group of arguments and treat it as an array of the arguments.  */
  41
  42 #undef NO_ARG_ARRAY
  43
  44 /* Define WORD_MACHINE if addresses and such have
  45  * to be corrected before they can be used as byte counts.  */
  46
  47 #undef WORD_MACHINE
  48
  49 /* Now define a symbol for the cpu type, if your compiler
  50    does not define it automatically:
  51    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  52    are the ones defined so far.  */
  53 /* Masscomp predefines mc68000. */
  54 #define m68000 mc68000
  55
  56 /* Use type int rather than a union, to represent Lisp_Object */
  57 /* This is desirable for most machines.  */
  58
  59 #define NO_UNION_TYPE
  60
  61 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  62    the 24-bit bit field into an int.  In other words, if bit fields
  63    are always unsigned.
  64
  65    If you use NO_UNION_TYPE, this flag does not matter.  */
  66
  67 #undef EXPLICIT_SIGN_EXTEND
  68
  69 /* Data type of load average, as read out of kmem.  */
  70
  71 #define LOAD_AVE_TYPE double
  72
  73 /* Convert that into an integer that is 100 for a load average of 1.0  */
  74
  75 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  76
  77 /* Define CANNOT_DUMP on machines where unexec does not work.
  78    Then the function dump-emacs will not be defined
  79    and temacs will do (load "loadup") automatically unless told otherwise.  */
  80
  81 #undef CANNOT_DUMP
  82
  83 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  84    pure and impure space as loaded can vary, and even their
  85    relative order cannot be relied on.
  86
  87    Otherwise Emacs assumes that text space precedes data space,
  88    numerically.  */
  89
  90 #undef VIRT_ADDR_VARIES
  91
  92 /* Define C_ALLOCA if this machine does not support a true alloca
  93    and the one written in C should be used instead.
  94    Define HAVE_ALLOCA to say that the system provides a properly
  95    working alloca function and it should be used.
  96    Define neither one if an assembler-language alloca
  97    in the file alloca.s should be used.  */
  98
  99 /* On return from a subroutine, the 68020 compiler restores old contents of
 100    register variables relative to sp, so alloca() screws up such routines.
 101    The following definitions should work on all Masscomps.  On the MC-5500
 102    (a 68000) one can #undef C_ALLOCA and #define HAVE_ALLOCA.  */
 103 #ifdef mc500
 104 #undef C_ALLOCA
 105 #define HAVE_ALLOCA
 106 #else
 107 #define C_ALLOCA
 108 #undef HAVE_ALLOCA
 109 #endif
 110
 111 /* Define NO_REMAP if memory segmentation makes it not work well
 112    to change the boundary between the text section and data section
 113    when Emacs is dumped.  If you define this, the preloaded Lisp
 114    code will not be sharable; but that's better than failing completely.  */
 115
 116 #undef NO_REMAP
 117
 118 /* crt0.c should use the vax-bsd style of entry, with a dummy arg.  */
 119
 120 #define CRT0_DUMMIES bogus_fp,
 121
 122 /* Name of file the to look in
 123    for the kernel symbol table (for load average) */
 124
 125 #define KERNEL_FILE "/unix"
 126
 127 /* This triggers some stuff to avoid a compiler bug */
 128
 129 #define MASSC_REGISTER_BUG
 130
 131 /* Prevent -lg from being used for debugging.  Not implemented?  */
 132
 133 #define LIBS_DEBUG
 134
 135 /*
 136  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
 137  *      for terminal control.
 138  */
 139
 140 #define HAVE_TERMIO
 141
 142 /* Adjust a header field for the executable file about to be dumped.  */
 143
 144 #define ADJUST_EXEC_HEADER   \
 145   hdr.a_stamp = STAMP13; /* really want the latest stamp, whatever it is */