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, 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 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  35  * group of arguments and treat it as an array of the arguments.  */
  36
  37 #define NO_ARG_ARRAY
  38
  39 /* Define WORD_MACHINE if addresses and such have
  40  * to be corrected before they can be used as byte counts.  */
  41
  42 #undef WORD_MACHINE
  43
  44 /* Now define a symbol for the cpu type, if your compiler
  45    does not define it automatically:
  46    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  47    are the ones defined so far.  */
  48
  49 #define ALLIANT
  50 #define ALLIANT_2800
  51 #define sun                     /* Use X support for Sun keyboard stuff. */
  52 #define C_OPTIMIZE_SWITCH -Og   /* No concurrent code allowed here. */
  53 #define VALBITS 26
  54 #define GCTYPEBITS 5
  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 /* On Alliants, bitfields are unsigned. */
  67
  68 #define EXPLICIT_SIGN_EXTEND
  69
  70 /* Concentrix uses a different kernel symbol for load average. */
  71
  72 #undef  LDAV_SYMBOL             /* Undo definition in s-bsd4-2.h */
  73 #define LDAV_SYMBOL "_Loadavg"
  74
  75 /* Data type of load average, as read out of kmem.  */
  76
  77 #define LOAD_AVE_TYPE long
  78
  79 /* Convert that into an integer that is 100 for a load average of 1.0  */
  80
  81 #define LOAD_AVE_CVT(x) (x * 100 / LOADAVG_SCALE)
  82
  83 /* include <sys/param.h> for the definition of LOADAVG_SCALE, and also
  84    LOADAVG_SIZE, the number of items in the Loadavg array. */
  85
  86 /* Define CANNOT_DUMP on machines where unexec does not work.
  87    Then the function dump-emacs will not be defined
  88    and temacs will do (load "loadup") automatically unless told otherwise.  */
  89
  90 /* #define CANNOT_DUMP */
  91 #define UNEXEC unexfx2800.o
  92 #define LIBS_MACHINE -lalliant
  93
  94 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  95    pure and impure space as loaded can vary, and even their
  96    relative order cannot be relied on.
  97
  98    Otherwise Emacs assumes that text space precedes data space,
  99    numerically.  */
 100
 101 #undef VIRT_ADDR_VARIES
 102
 103 /* Define C_ALLOCA if this machine does not support a true alloca
 104    and the one written in C should be used instead.
 105    Define HAVE_ALLOCA to say that the system provides a properly
 106    working alloca function and it should be used.
 107    Define neither one if an assembler-language alloca
 108    in the file alloca.s should be used.  */
 109
 110 #undef C_ALLOCA
 111 #define HAVE_ALLOCA
 112
 113 /* Define NO_REMAP if memory segmentation makes it not work well
 114    to change the boundary between the text section and data section
 115    when Emacs is dumped.  If you define this, the preloaded Lisp
 116    code will not be sharable; but that's better than failing completely.  */
 117 /* Actually, Alliant CONCENTRIX does paging "right":
 118    data pages are copy-on-write, which means that the pure data areas
 119    are shared automatically and remapping is not necessary.  */
 120
 121 #define NO_REMAP
 122
 123 /* Alliant needs special crt0.o because system version is not reentrant */
 124
 125 #define START_FILES crt0.o
 126
 127 /* Alliant dependent code for dumping executing image.
 128    See crt0.c code for alliant.  */
 129
 130 #define ADJUST_EXEC_HEADER {\
 131 extern int _curbrk, _setbrk;\
 132 _setbrk = _curbrk;\
 133 hdr.a_bss_addr = bss_start;\
 134 unexec_text_start = hdr.a_text_addr;}
 135
 136 /* POSIX Compatibility */
 137 /* Use System V.4 style getdents/readdir <dirent.h> for 2.2 and up. */
 138 #define SYSV_SYSTEM_DIR
 139
 140 /* Use the K&R version of the DEFUN macro.  */
 141 #define USE_NONANSI_DEFUN