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

   1 /* machine description file for hp9000 series 800 machines.
   2    Copyright (C) 1987, 2002, 2003 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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  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="hpux"  */
  25
  26 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  27    is the most significant byte.  */
  28
  29 #define WORDS_BIG_ENDIAN
  30
  31 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  32  * group of arguments and treat it as an array of the arguments.  */
  33
  34 #define NO_ARG_ARRAY
  35
  36 /* Define WORD_MACHINE if addresses and such have
  37  * to be corrected before they can be used as byte counts.  */
  38
  39 #undef WORD_MACHINE
  40
  41 /* Now define a symbol for the cpu type, if your compiler
  42    does not define it automatically:
  43    Ones defined so far include vax, m68000, ns16000, pyramid,
  44    orion, tahoe, APOLLO and many others */
  45 #ifndef hp9000s800
  46 #       define hp9000s800
  47 #endif
  48
  49 /* Use type int rather than a union, to represent Lisp_Object */
  50 /* This is desirable for most machines.  */
  51
  52 #define NO_UNION_TYPE
  53
  54 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  55    the bit field into an int.  In other words, if bit fields
  56    are always unsigned.
  57
  58    If you use NO_UNION_TYPE, this flag does not matter.  */
  59
  60 #define EXPLICIT_SIGN_EXTEND
  61
  62 /* The standard definitions of these macros would work ok,
  63    but these are faster because the constants are short. */
  64
  65
  66 #define XUINT(a) (((unsigned)(a) << BITS_PER_INT-VALBITS) >> BITS_PER_INT-VALBITS)
  67
  68 #define XSET(var, type, ptr) \
  69    ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << BITS_PER_INT-VALBITS) >> BITS_PER_INT-VALBITS))
  70
  71 #define XMARKBIT(a) ((a) < 0)
  72
  73 #if 0  /* Loses when sign bit of type field is set.  */
  74 #define XUNMARK(a) ((a) = (((a) << BITS_PER_INT-GCTYPEBITS-VALBITS) >> BITS_PER_INT-GCTYPEBITS-VALBITS))
  75 #endif
  76 \f
  77 /* Common definitions for HPUX and GNU/Linux.  */
  78
  79 #if defined (__hpux) || defined (GNU_LINUX)
  80 /* Now define a symbol for the cpu type, if your compiler
  81    does not define it automatically:
  82    Ones defined so far include vax, m68000, ns16000, pyramid,
  83    orion, tahoe, APOLLO and many others */
  84 #ifndef hp9000s800
  85 #     define hp9000s800
  86 #endif
  87
  88 /* Define CANNOT_DUMP on machines where unexec does not work.
  89    Then the function dump-emacs will not be defined
  90    and temacs will do (load "loadup") automatically unless told otherwise.  */
  91
  92 #undef CANNOT_DUMP
  93
  94 /* Define NO_REMAP if memory segmentation makes it not work well
  95    to change the boundary between the text section and data section
  96    when Emacs is dumped.  If you define this, the preloaded Lisp
  97    code will not be sharable; but that's better than failing completely.  */
  98
  99 #define NO_REMAP
 100
 101 #endif /* __hpux or GNU_LINUX */
 102 \f
 103 /* Stuff for just GNU/Linux.  */
 104
 105 #ifdef GNU_LINUX
 106
 107 /* Data type of load average, as read out of kmem.  */
 108
 109 #define LOAD_AVE_TYPE long
 110
 111 /* Convert that into an integer that is 100 for a load average of 1.0  */
 112
 113 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
 114
 115 #endif /* GNU_LINUX */
 116 \f
 117 /* Stuff for just HPUX.  */
 118
 119 #ifdef __hpux
 120
 121 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 122    pure and impure space as loaded can vary, and even their
 123    relative order cannot be relied on.
 124
 125    Otherwise Emacs assumes that text space precedes data space,
 126    numerically.  */
 127
 128 #define VIRT_ADDR_VARIES
 129 \f
 130 /* the data segment on this machine always starts at address 0x40000000. */
 131
 132 #define DATA_SEG_BITS 0x40000000
 133
 134 #define DATA_START    0x40000000
 135 #define TEXT_START    0x00000000
 136
 137 /* This machine requires completely different unexec code
 138    which lives in a separate file.  Specify the file name.  */
 139
 140 #define UNEXEC unexhp9k800.o
 141
 142 #define LIBS_MACHINE
 143 #define LIBS_DEBUG
 144
 145 /* Include the file bsdtty.h, since this machine has job control.  */
 146 #define NEED_BSDTTY
 147
 148 /* Data type of load average, as read out of kmem.  */
 149
 150 #define LOAD_AVE_TYPE double
 151
 152 /* Convert that into an integer that is 100 for a load average of 1.0  */
 153
 154 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
 155
 156 /* The symbol in the kernel where the load average is found
 157    is named _avenrun.  At this time there are two major flavors
 158    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 159    differences are thusly moved to the corresponding machine description file.
 160 */
 161
 162 /* no underscore please */
 163 #define LDAV_SYMBOL "avenrun"
 164
 165 #if 0   /* Supposedly no longer true.  */
 166 /* In hpux, for unknown reasons, S_IFLNK is defined even though
 167    symbolic links do not exist.
 168    Make sure our conditionals based on S_IFLNK are not confused.
 169
 170    Here we assume that stat.h is included before config.h
 171    so that we can override it here.  */
 172
 173 #undef S_IFLNK
 174 #endif
 175
 176 /* On USG systems these have different names. */
 177
 178 #define index strchr
 179 #define rindex strrchr
 180
 181 #endif /* __hpux */