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., 51 Franklin Street, Fifth Floor,
  19 Boston, MA 02110-1301, 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 \f
  71 /* Common definitions for HPUX and GNU/Linux.  */
  72
  73 #if defined (__hpux) || defined (GNU_LINUX)
  74 /* Now define a symbol for the cpu type, if your compiler
  75    does not define it automatically:
  76    Ones defined so far include vax, m68000, ns16000, pyramid,
  77    orion, tahoe, APOLLO and many others */
  78 #ifndef hp9000s800
  79 #     define hp9000s800
  80 #endif
  81
  82 /* Define CANNOT_DUMP on machines where unexec does not work.
  83    Then the function dump-emacs will not be defined
  84    and temacs will do (load "loadup") automatically unless told otherwise.  */
  85
  86 #undef CANNOT_DUMP
  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
  93 #define NO_REMAP
  94
  95 #endif /* __hpux or GNU_LINUX */
  96 \f
  97 /* Stuff for just GNU/Linux.  */
  98
  99 #ifdef GNU_LINUX
 100
 101 /* Data type of load average, as read out of kmem.  */
 102
 103 #define LOAD_AVE_TYPE long
 104
 105 /* Convert that into an integer that is 100 for a load average of 1.0  */
 106
 107 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
 108
 109 #endif /* GNU_LINUX */
 110 \f
 111 /* Stuff for just HPUX.  */
 112
 113 #ifdef __hpux
 114
 115 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 116    pure and impure space as loaded can vary, and even their
 117    relative order cannot be relied on.
 118
 119    Otherwise Emacs assumes that text space precedes data space,
 120    numerically.  */
 121
 122 #define VIRT_ADDR_VARIES
 123 \f
 124 /* the data segment on this machine always starts at address 0x40000000. */
 125
 126 #define DATA_SEG_BITS 0x40000000
 127
 128 #define DATA_START    0x40000000
 129 #define TEXT_START    0x00000000
 130
 131 /* This machine requires completely different unexec code
 132    which lives in a separate file.  Specify the file name.  */
 133
 134 #define UNEXEC unexhp9k800.o
 135
 136 #define LIBS_MACHINE
 137 #define LIBS_DEBUG
 138
 139 /* Include the file bsdtty.h, since this machine has job control.  */
 140 #define NEED_BSDTTY
 141
 142 /* Data type of load average, as read out of kmem.  */
 143
 144 #define LOAD_AVE_TYPE double
 145
 146 /* Convert that into an integer that is 100 for a load average of 1.0  */
 147
 148 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
 149
 150 /* The symbol in the kernel where the load average is found
 151    is named _avenrun.  At this time there are two major flavors
 152    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 153    differences are thusly moved to the corresponding machine description file.
 154 */
 155
 156 /* no underscore please */
 157 #define LDAV_SYMBOL "avenrun"
 158
 159 #if 0   /* Supposedly no longer true.  */
 160 /* In hpux, for unknown reasons, S_IFLNK is defined even though
 161    symbolic links do not exist.
 162    Make sure our conditionals based on S_IFLNK are not confused.
 163
 164    Here we assume that stat.h is included before config.h
 165    so that we can override it here.  */
 166
 167 #undef S_IFLNK
 168 #endif
 169
 170 /* On USG systems these have different names. */
 171
 172 #define index strchr
 173 #define rindex strrchr
 174
 175 #endif /* __hpux */
 176
 177 /* arch-tag: 809436e6-1645-4b92-b40d-2de5d6e7227c
 178    (do not change this comment) */