code.delx.au - gnu-emacs/blob - src/m/hp800.h

   1 /* machine description file for hp9000 series 800 machines.
   2    Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005,
   3                  2006, 2007, 2008  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="hpux"  */
  26
  27 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  28    is the most significant byte.  */
  29
  30 #define 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    Ones defined so far include vax, m68000, ns16000, pyramid,
  45    orion, tahoe, APOLLO and many others */
  46 #ifndef hp9000s800
  47 #       define hp9000s800
  48 #endif
  49
  50 /* Use type int rather than a union, to represent Lisp_Object */
  51 /* This is desirable for most machines.  */
  52
  53 #define NO_UNION_TYPE
  54
  55 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  56    the bit field into an int.  In other words, if bit fields
  57    are always unsigned.
  58
  59    If you use NO_UNION_TYPE, this flag does not matter.  */
  60
  61 #define EXPLICIT_SIGN_EXTEND
  62
  63 \f
  64 /* Common definitions for HPUX and GNU/Linux.  */
  65
  66 #if defined (__hpux) || defined (GNU_LINUX)
  67 /* Now define a symbol for the cpu type, if your compiler
  68    does not define it automatically:
  69    Ones defined so far include vax, m68000, ns16000, pyramid,
  70    orion, tahoe, APOLLO and many others */
  71 #ifndef hp9000s800
  72 #     define hp9000s800
  73 #endif
  74
  75 /* Define CANNOT_DUMP on machines where unexec does not work.
  76    Then the function dump-emacs will not be defined
  77    and temacs will do (load "loadup") automatically unless told otherwise.  */
  78
  79 #undef CANNOT_DUMP
  80
  81 /* Define NO_REMAP if memory segmentation makes it not work well
  82    to change the boundary between the text section and data section
  83    when Emacs is dumped.  If you define this, the preloaded Lisp
  84    code will not be sharable; but that's better than failing completely.  */
  85
  86 #define NO_REMAP
  87
  88 #endif /* __hpux or GNU_LINUX */
  89 \f
  90 /* Stuff for just GNU/Linux.  */
  91
  92 #ifdef GNU_LINUX
  93
  94 /* Data type of load average, as read out of kmem.  */
  95
  96 #define LOAD_AVE_TYPE long
  97
  98 /* Convert that into an integer that is 100 for a load average of 1.0  */
  99
 100 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
 101
 102 #endif /* GNU_LINUX */
 103 \f
 104 /* Stuff for just HPUX.  */
 105
 106 #ifdef __hpux
 107
 108 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 109    pure and impure space as loaded can vary, and even their
 110    relative order cannot be relied on.
 111
 112    Otherwise Emacs assumes that text space precedes data space,
 113    numerically.  */
 114
 115 #define VIRT_ADDR_VARIES
 116 \f
 117 /* the data segment on this machine always starts at address 0x40000000. */
 118
 119 #define DATA_SEG_BITS 0x40000000
 120
 121 #define DATA_START    0x40000000
 122 #define TEXT_START    0x00000000
 123
 124 /* This machine requires completely different unexec code
 125    which lives in a separate file.  Specify the file name.  */
 126
 127 #define UNEXEC unexhp9k800.o
 128
 129 #define LIBS_MACHINE
 130 #define LIBS_DEBUG
 131
 132 /* Include the file bsdtty.h, since this machine has job control.  */
 133 #define NEED_BSDTTY
 134
 135 /* Data type of load average, as read out of kmem.  */
 136
 137 #define LOAD_AVE_TYPE double
 138
 139 /* Convert that into an integer that is 100 for a load average of 1.0  */
 140
 141 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
 142
 143 /* The symbol in the kernel where the load average is found
 144    is named _avenrun.  At this time there are two major flavors
 145    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 146    differences are thusly moved to the corresponding machine description file.
 147 */
 148
 149 /* no underscore please */
 150 #define LDAV_SYMBOL "avenrun"
 151
 152 #if 0   /* Supposedly no longer true.  */
 153 /* In hpux, for unknown reasons, S_IFLNK is defined even though
 154    symbolic links do not exist.
 155    Make sure our conditionals based on S_IFLNK are not confused.
 156
 157    Here we assume that stat.h is included before config.h
 158    so that we can override it here.  */
 159
 160 #undef S_IFLNK
 161 #endif
 162
 163 /* On USG systems these have different names. */
 164
 165 #define index strchr
 166 #define rindex strrchr
 167
 168 #endif /* __hpux */
 169 \f
 170 /* Systems with GCC don't need to lose. */
 171 #ifdef __NetBSD__
 172 # ifdef __GNUC__
 173 #  define alloca __builtin_alloca
 174 #  define HAVE_ALLOCA
 175 # endif /* __GNUC__ */
 176 #endif /* __NetBSD__ */
 177
 178 /* arch-tag: 809436e6-1645-4b92-b40d-2de5d6e7227c
 179    (do not change this comment) */