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 WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  35    is the most significant byte.  */
  36
  37 #undef WORDS_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 #define 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
  54 #define ALLIANT
  55 #define ALLIANT_2800
  56 #define sun                     /* Use X support for Sun keyboard stuff. */
  57 #define C_OPTIMIZE_SWITCH -Og   /* No concurrent code allowed here. */
  58
  59 /* Use type int rather than a union, to represent Lisp_Object */
  60 /* This is desirable for most machines.  */
  61
  62 #define NO_UNION_TYPE
  63
  64 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  65    the bit field into an int.  In other words, if bit fields
  66    are always unsigned.
  67
  68    If you use NO_UNION_TYPE, this flag does not matter.  */
  69 /* On Alliants, bitfields are unsigned. */
  70
  71 #define EXPLICIT_SIGN_EXTEND
  72
  73 /* Concentrix uses a different kernel symbol for load average. */
  74
  75 #undef  LDAV_SYMBOL             /* Undo definition in s-bsd4-2.h */
  76 #define LDAV_SYMBOL "_Loadavg"
  77
  78 /* Data type of load average, as read out of kmem.  */
  79
  80 #define LOAD_AVE_TYPE long
  81
  82 /* Convert that into an integer that is 100 for a load average of 1.0  */
  83
  84 #define LOAD_AVE_CVT(x) (x * 100 / LOADAVG_SCALE)
  85
  86 /* include <sys/param.h> for the definition of LOADAVG_SCALE, and also
  87    LOADAVG_SIZE, the number of items in the Loadavg array. */
  88
  89 /* Define CANNOT_DUMP on machines where unexec does not work.
  90    Then the function dump-emacs will not be defined
  91    and temacs will do (load "loadup") automatically unless told otherwise.  */
  92
  93 /* #define CANNOT_DUMP */
  94 #define UNEXEC unexfx2800.o
  95 #define LIBS_MACHINE -lalliant
  96
  97 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  98    pure and impure space as loaded can vary, and even their
  99    relative order cannot be relied on.
 100
 101    Otherwise Emacs assumes that text space precedes data space,
 102    numerically.  */
 103
 104 #undef VIRT_ADDR_VARIES
 105
 106 /* Define C_ALLOCA if this machine does not support a true alloca
 107    and the one written in C should be used instead.
 108    Define HAVE_ALLOCA to say that the system provides a properly
 109    working alloca function and it should be used.
 110    Define neither one if an assembler-language alloca
 111    in the file alloca.s should be used.  */
 112
 113 #undef C_ALLOCA
 114 #define HAVE_ALLOCA
 115
 116 /* Define NO_REMAP if memory segmentation makes it not work well
 117    to change the boundary between the text section and data section
 118    when Emacs is dumped.  If you define this, the preloaded Lisp
 119    code will not be sharable; but that's better than failing completely.  */
 120 /* Actually, Alliant CONCENTRIX does paging "right":
 121    data pages are copy-on-write, which means that the pure data areas
 122    are shared automatically and remapping is not necessary.  */
 123
 124 #define NO_REMAP
 125
 126 /* Alliant needs special crt0.o because system version is not reentrant */
 127
 128 #define START_FILES crt0.o
 129
 130 /* Alliant dependent code for dumping executing image.
 131    See crt0.c code for alliant.  */
 132
 133 #define ADJUST_EXEC_HEADER {\
 134 extern int _curbrk, _setbrk;\
 135 _setbrk = _curbrk;\
 136 hdr.a_bss_addr = bss_start;\
 137 unexec_text_start = hdr.a_text_addr;}
 138
 139 /* POSIX Compatibility */
 140 /* Use System V.4 style getdents/readdir <dirent.h> for 2.2 and up. */
 141 #define SYSV_SYSTEM_DIR
 142
 143 /* Use the K&R version of the DEFUN macro.  */
 144 #define USE_NONANSI_DEFUN