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