src/m/sequent-ptx.h

   1 /* machine description file for SEQUENT machines running DYNIX/ptx
   2    Copyright (C) 1985, 1986, 2002, 2003, 2004,
   3                  2005, 2006 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 2, 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="ptx"  */
  26
  27 #include "intel386.h"
  28
  29 /* Define how to take a char and sign-extend into an int.
  30    On machines where char is signed, this is a no-op.  */
  31 /* CHECK THIS */
  32 #define SIGN_EXTEND_CHAR(c) (c)
  33
  34 /* Now define a symbol for the cpu type, if your compiler
  35    does not define it automatically:
  36    Ones defined so far include vax, m68000, ns16000, pyramid,
  37    orion, tahoe, APOLLO and many others.  */
  38
  39 /* BTW: ptx defines _SEQUENT_, i386 */
  40
  41 /* Use type int rather than a union, to represent Lisp_Object */
  42 /* This is desirable for most machines.  */
  43
  44 #define NO_UNION_TYPE
  45
  46 /* crt0.c should use the vax-bsd style of entry, with these dummy args.  */
  47 /* Already defined.  Assume prior definition works for PTX.  */
  48 #if 0
  49 #undef CRT0_DUMMIES
  50 #define CRT0_DUMMIES dummy1, dummy2, dummy3,
  51 #endif
  52
  53 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  54    the 24-bit bit field into an int.  In other words, if bit fields
  55    are always unsigned.
  56
  57    If you use NO_UNION_TYPE, this flag does not matter.  */
  58
  59 #define EXPLICIT_SIGN_EXTEND
  60
  61 /* Data type of load average, as read out of kmem.  */
  62
  63 #undef LOAD_AVE_TYPE
  64 #define LOAD_AVE_TYPE unsigned long
  65
  66 /* Convert that into an integer that is 100 for a load average of 1.0  */
  67
  68 #undef FSCALE
  69 #define FSCALE  1000.0
  70 #undef LOAD_AVE_CVT
  71 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  72
  73 /* Define CANNOT_DUMP on machines where unexec does not work.
  74    Then the function dump-emacs will not be defined
  75    and temacs will do (load "loadup") automatically unless told otherwise.  */
  76
  77 /* #define CANNOT_DUMP */
  78
  79 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  80    pure and impure space as loaded can vary, and even their
  81    relative order cannot be relied on.
  82
  83    Otherwise Emacs assumes that text space precedes data space,
  84    numerically.  */
  85
  86 /* #define VIRT_ADDR_VARIES */
  87
  88 /* Define NO_REMAP if memory segmentation makes it not work well
  89    to change the boundary between the text section and data section
  90    when Emacs is dumped.  If you define this, the preloaded Lisp
  91    code will not be sharable; but that's better than failing completely.  */
  92 /* On PTX, can't seem to get a valid executable unless NO_REMAP is
  93    defined.  This did work in the Sequent patched Emacs 18.57.  */
  94 #ifndef NO_REMAP
  95 #define NO_REMAP
  96 #endif
  97 /* #undef NO_REMAP */
  98
  99 /* If a valid PTX executable could be dumped without NO_REMAP defined,
 100    here's a guess at some defines to make it work.  */
 101 #ifndef NO_REMAP
 102
 103 /* PTX has getpagesize() but it returns 296. Using the default method of
 104    including getpagesize.h in unexec.c returns 4096 which seems more
 105    reasonable.  */
 106 #undef HAVE_GETPAGESIZE
 107
 108 /* Override magic number for a.out header.  */
 109 #define EXEC_MAGIC 0411         /* from a.out.h: separated I&D */
 110
 111 #define ADJUST_TEXT_SCNHDR_SIZE
 112 #define ADJUST_TEXTBASE
 113
 114 /* The file sections in the Symmetry a.out must be on 4K boundaries.  */
 115 /* #define DATA_SECTION_ALIGNMENT       (4096-1) */
 116
 117 #endif  /* ifndef NO_REMAP */
 118
 119 /* Avoids a compiler bug.  */
 120 #define TAHOE_REGISTER_BUG
 121
 122 /* (short) negative-int doesn't sign-extend correctly.  */
 123 #define SHORT_CAST_BUG
 124
 125 /* Cause compilations to be done in parallel in ymakefile.  */
 126 #define MAKE_PARALLEL $&
 127
 128 /* Use terminfo library.  */
 129 #define LIBS_TERMCAP -ltermlib
 130
 131 /* arch-tag: 0494629b-7e11-4f6f-865f-62254ac46099
 132    (do not change this comment) */