src/m/alliant-2800.h

   1 /* alliant-2800.h - Alliant FX/2800 machine running Concentrix 2800.
   2    Copyright (C) 1990 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="bsd4-3"  */
  25
  26 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  27    is the most significant byte.  */
  28
  29 #undef 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 #define 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
  46 #define ALLIANT
  47 #define ALLIANT_2800
  48 #define sun                     /* Use X support for Sun keyboard stuff. */
  49 #define C_OPTIMIZE_SWITCH -Og   /* No concurrent code allowed here. */
  50
  51 /* Use type int rather than a union, to represent Lisp_Object */
  52 /* This is desirable for most machines.  */
  53
  54 #define NO_UNION_TYPE
  55
  56 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  57    the bit field into an int.  In other words, if bit fields
  58    are always unsigned.
  59
  60    If you use NO_UNION_TYPE, this flag does not matter.  */
  61 /* On Alliants, bitfields are unsigned. */
  62
  63 #define EXPLICIT_SIGN_EXTEND
  64
  65 /* Concentrix uses a different kernel symbol for load average. */
  66
  67 #undef  LDAV_SYMBOL             /* Undo definition in s-bsd4-2.h */
  68 #define LDAV_SYMBOL "_Loadavg"
  69
  70 /* Data type of load average, as read out of kmem.  */
  71
  72 #define LOAD_AVE_TYPE long
  73
  74 /* Convert that into an integer that is 100 for a load average of 1.0  */
  75
  76 #define LOAD_AVE_CVT(x) (x * 100 / LOADAVG_SCALE)
  77
  78 /* include <sys/param.h> for the definition of LOADAVG_SCALE, and also
  79    LOADAVG_SIZE, the number of items in the Loadavg array. */
  80
  81 /* Define CANNOT_DUMP on machines where unexec does not work.
  82    Then the function dump-emacs will not be defined
  83    and temacs will do (load "loadup") automatically unless told otherwise.  */
  84
  85 /* #define CANNOT_DUMP */
  86 #define UNEXEC unexfx2800.o
  87 #define LIBS_MACHINE -lalliant
  88
  89 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  90    pure and impure space as loaded can vary, and even their
  91    relative order cannot be relied on.
  92
  93    Otherwise Emacs assumes that text space precedes data space,
  94    numerically.  */
  95
  96 #undef VIRT_ADDR_VARIES
  97
  98 /* Define C_ALLOCA if this machine does not support a true alloca
  99    and the one written in C should be used instead.
 100    Define HAVE_ALLOCA to say that the system provides a properly
 101    working alloca function and it should be used.
 102    Define neither one if an assembler-language alloca
 103    in the file alloca.s should be used.  */
 104
 105 #undef C_ALLOCA
 106 #define HAVE_ALLOCA
 107
 108 /* Define NO_REMAP if memory segmentation makes it not work well
 109    to change the boundary between the text section and data section
 110    when Emacs is dumped.  If you define this, the preloaded Lisp
 111    code will not be sharable; but that's better than failing completely.  */
 112 /* Actually, Alliant CONCENTRIX does paging "right":
 113    data pages are copy-on-write, which means that the pure data areas
 114    are shared automatically and remapping is not necessary.  */
 115
 116 #define NO_REMAP
 117
 118 /* Alliant needs special crt0.o because system version is not reentrant */
 119
 120 #define START_FILES crt0.o
 121
 122 /* Alliant dependent code for dumping executing image.
 123    See crt0.c code for alliant.  */
 124
 125 #define ADJUST_EXEC_HEADER {\
 126 extern int _curbrk, _setbrk;\
 127 _setbrk = _curbrk;\
 128 hdr.a_bss_addr = bss_start;\
 129 unexec_text_start = hdr.a_text_addr;}
 130
 131 /* POSIX Compatibility */
 132 /* Use System V.4 style getdents/readdir <dirent.h> for 2.2 and up. */
 133 #define SYSV_SYSTEM_DIR
 134
 135 /* Use the K&R version of the DEFUN macro.  */
 136 #define USE_NONANSI_DEFUN