code.delx.au - gnu-emacs/blob - 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 distributed in the hope that it will be useful,
   7 but WITHOUT ANY WARRANTY.  No author or distributor
   8 accepts responsibility to anyone for the consequences of using it
   9 or for whether it serves any particular purpose or works at all,
  10 unless he says so in writing.  Refer to the GNU Emacs General Public
  11 License for full details.
  12
  13 Everyone is granted permission to copy, modify and redistribute
  14 GNU Emacs, but only under the conditions described in the
  15 GNU Emacs General Public License.   A copy of this license is
  16 supposed to have been given to you along with GNU Emacs so you
  17 can know your rights and responsibilities.  It should be in a
  18 file named COPYING.  Among other things, the copyright notice
  19 and this notice must be preserved on all copies.  */
  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 /* The following three symbols give information on
  27  the size of various data types.  */
  28
  29 #define SHORTBITS 16            /* Number of bits in a short */
  30
  31 #define INTBITS 32              /* Number of bits in an int */
  32
  33 #define LONGBITS 32             /* Number of bits in a long */
  34
  35 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  36    is the most significant byte.  */
  37
  38 #undef BIG_ENDIAN
  39
  40 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  41  * group of arguments and treat it as an array of the arguments.  */
  42
  43 #define NO_ARG_ARRAY
  44
  45 /* Define WORD_MACHINE if addresses and such have
  46  * to be corrected before they can be used as byte counts.  */
  47
  48 #undef WORD_MACHINE
  49
  50 /* Now define a symbol for the cpu type, if your compiler
  51    does not define it automatically:
  52    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  53    are the ones defined so far.  */
  54
  55 #define ALLIANT
  56 #define ALLIANT_2800
  57 #define sun                     /* Use X support for Sun keyboard stuff. */
  58 #define C_OPTIMIZE_SWITCH -Og   /* No concurrent code allowed here. */
  59 #define VALBITS 26
  60 #define GCTYPEBITS 5
  61
  62 /* Use type int rather than a union, to represent Lisp_Object */
  63 /* This is desirable for most machines.  */
  64
  65 #define NO_UNION_TYPE
  66
  67 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  68    the 24-bit bit field into an int.  In other words, if bit fields
  69    are always unsigned.
  70
  71    If you use NO_UNION_TYPE, this flag does not matter.  */
  72 /* On Alliants, bitfields are unsigned. */
  73
  74 #define EXPLICIT_SIGN_EXTEND
  75
  76 /* Concentrix uses a different kernel symbol for load average. */
  77
  78 #undef  LDAV_SYMBOL             /* Undo definition in s-bsd4-2.h */
  79 #define LDAV_SYMBOL "_Loadavg"
  80
  81 /* Data type of load average, as read out of kmem.  */
  82
  83 #define LOAD_AVE_TYPE long
  84
  85 /* Convert that into an integer that is 100 for a load average of 1.0  */
  86
  87 #define LOAD_AVE_CVT(x) (x * 100 / LOADAVG_SCALE)
  88
  89 /* include <sys/param.h> for the definition of LOADAVG_SCALE, and also
  90    LOADAVG_SIZE, the number of items in the Loadavg array. */
  91
  92 /* Define CANNOT_DUMP on machines where unexec does not work.
  93    Then the function dump-emacs will not be defined
  94    and temacs will do (load "loadup") automatically unless told otherwise.  */
  95
  96 /* #define CANNOT_DUMP */
  97 #define UNEXEC unexfx2800.o
  98 #define LIBS_MACHINE -lalliant
  99
 100 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 101    pure and impure space as loaded can vary, and even their
 102    relative order cannot be relied on.
 103
 104    Otherwise Emacs assumes that text space precedes data space,
 105    numerically.  */
 106
 107 #undef VIRT_ADDR_VARIES
 108
 109 /* Define C_ALLOCA if this machine does not support a true alloca
 110    and the one written in C should be used instead.
 111    Define HAVE_ALLOCA to say that the system provides a properly
 112    working alloca function and it should be used.
 113    Define neither one if an assembler-language alloca
 114    in the file alloca.s should be used.  */
 115
 116 #undef C_ALLOCA
 117 #define HAVE_ALLOCA
 118
 119 /* Define NO_REMAP if memory segmentation makes it not work well
 120    to change the boundary between the text section and data section
 121    when Emacs is dumped.  If you define this, the preloaded Lisp
 122    code will not be sharable; but that's better than failing completely.  */
 123 /* Actually, Alliant CONCENTRIX does paging "right":
 124    data pages are copy-on-write, which means that the pure data areas
 125    are shared automatically and remapping is not necessary.  */
 126
 127 #define NO_REMAP
 128
 129 /* Alliant needs special crt0.o because system version is not reentrant */
 130
 131 #define START_FILES crt0.o
 132
 133 /* Alliant dependent code for dumping executing image.
 134    See crt0.c code for alliant.  */
 135
 136 #define ADJUST_EXEC_HEADER {\
 137 extern int _curbrk, _setbrk;\
 138 _setbrk = _curbrk;\
 139 hdr.a_bss_addr = bss_start;\
 140 unexec_text_start = hdr.a_text_addr;}
 141
 142 /* POSIX Compatibility */
 143 /* Use System V.4 style getdents/readdir <dirent.h> for 2.2 and up. */
 144 #define SYSV_SYSTEM_DIR
 145 #define HAVE_CLOSEDIR