src/m/alliant-2800.h

   1 /* alliant-2800.h - Alliant FX/2800 machine running Concentrix 2800.
   2    Copyright (C) 1990, 2001, 2002, 2003, 2004, 2005,
   3                  2006, 2007  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22
  23 /* The following line tells the configuration script what sort of
  24    operating system this machine is likely to run.
  25    USUAL-OPSYS="bsd4-3"  */
  26
  27 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  28    is the most significant byte.  */
  29
  30 #undef WORDS_BIG_ENDIAN
  31
  32 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  33  * group of arguments and treat it as an array of the arguments.  */
  34
  35 #define NO_ARG_ARRAY
  36
  37 /* Define WORD_MACHINE if addresses and such have
  38  * to be corrected before they can be used as byte counts.  */
  39
  40 #undef WORD_MACHINE
  41
  42 /* Now define a symbol for the cpu type, if your compiler
  43    does not define it automatically:
  44    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  45    are the ones defined so far.  */
  46
  47 #define ALLIANT
  48 #define ALLIANT_2800
  49 #define sun                     /* Use X support for Sun keyboard stuff. */
  50 #define C_OPTIMIZE_SWITCH -Og   /* No concurrent code allowed here. */
  51
  52 /* Use type int rather than a union, to represent Lisp_Object */
  53 /* This is desirable for most machines.  */
  54
  55 #define NO_UNION_TYPE
  56
  57 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  58    the bit field into an int.  In other words, if bit fields
  59    are always unsigned.
  60
  61    If you use NO_UNION_TYPE, this flag does not matter.  */
  62 /* On Alliants, bitfields are unsigned. */
  63
  64 #define EXPLICIT_SIGN_EXTEND
  65
  66 /* Concentrix uses a different kernel symbol for load average. */
  67
  68 #undef  LDAV_SYMBOL             /* Undo definition in s-bsd4-2.h */
  69 #define LDAV_SYMBOL "_Loadavg"
  70
  71 /* Data type of load average, as read out of kmem.  */
  72
  73 #define LOAD_AVE_TYPE long
  74
  75 /* Convert that into an integer that is 100 for a load average of 1.0  */
  76
  77 #define LOAD_AVE_CVT(x) (x * 100 / LOADAVG_SCALE)
  78
  79 /* include <sys/param.h> for the definition of LOADAVG_SCALE, and also
  80    LOADAVG_SIZE, the number of items in the Loadavg array. */
  81
  82 /* Define CANNOT_DUMP on machines where unexec does not work.
  83    Then the function dump-emacs will not be defined
  84    and temacs will do (load "loadup") automatically unless told otherwise.  */
  85
  86 /* #define CANNOT_DUMP */
  87 #define UNEXEC unexfx2800.o
  88 #define LIBS_MACHINE -lalliant
  89
  90 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  91    pure and impure space as loaded can vary, and even their
  92    relative order cannot be relied on.
  93
  94    Otherwise Emacs assumes that text space precedes data space,
  95    numerically.  */
  96
  97 #undef VIRT_ADDR_VARIES
  98
  99 /* Define NO_REMAP if memory segmentation makes it not work well
 100    to change the boundary between the text section and data section
 101    when Emacs is dumped.  If you define this, the preloaded Lisp
 102    code will not be sharable; but that's better than failing completely.  */
 103 /* Actually, Alliant CONCENTRIX does paging "right":
 104    data pages are copy-on-write, which means that the pure data areas
 105    are shared automatically and remapping is not necessary.  */
 106
 107 #define NO_REMAP
 108
 109 /* Alliant needs special crt0.o because system version is not reentrant */
 110
 111 #define START_FILES crt0.o
 112
 113 /* Alliant dependent code for dumping executing image.
 114    See crt0.c code for alliant.  */
 115
 116 #define ADJUST_EXEC_HEADER {\
 117 extern int _curbrk, _setbrk;\
 118 _setbrk = _curbrk;\
 119 hdr.a_bss_addr = bss_start;\
 120 unexec_text_start = hdr.a_text_addr;}
 121
 122 /* POSIX Compatibility */
 123 /* Use System V.4 style getdents/readdir <dirent.h> for 2.2 and up. */
 124 #define SYSV_SYSTEM_DIR
 125
 126 /* Use the K&R version of the DEFUN macro.  */
 127 #define USE_NONANSI_DEFUN
 128
 129 /* arch-tag: 8ba70b15-d082-40f6-931d-14adfd7f9dbd
 130    (do not change this comment) */