src/m/hp800.h

   1 /* machine description file for hp9000 series 800 machines.
   2    Copyright (C) 1987, 2002 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 #define XSETMARKBIT(a,b) ((a) = ((b) ? (a)|MARKBIT : (a) & ~MARKBIT))
  73
  74 #if 0  /* Loses when sign bit of type field is set.  */
  75 #define XUNMARK(a) ((a) = (((a) << BITS_PER_INT-GCTYPEBITS-VALBITS) >> BITS_PER_INT-GCTYPEBITS-VALBITS))
  76 #endif
  77 \f
  78 /* Common definitions for HPUX and GNU/Linux.  */
  79
  80 #if defined (__hpux) || defined (GNU_LINUX)
  81 /* Now define a symbol for the cpu type, if your compiler
  82    does not define it automatically:
  83    Ones defined so far include vax, m68000, ns16000, pyramid,
  84    orion, tahoe, APOLLO and many others */
  85 #ifndef hp9000s800
  86 #     define hp9000s800
  87 #endif
  88
  89 /* Define CANNOT_DUMP on machines where unexec does not work.
  90    Then the function dump-emacs will not be defined
  91    and temacs will do (load "loadup") automatically unless told otherwise.  */
  92
  93 #undef CANNOT_DUMP
  94
  95 /* Define NO_REMAP if memory segmentation makes it not work well
  96    to change the boundary between the text section and data section
  97    when Emacs is dumped.  If you define this, the preloaded Lisp
  98    code will not be sharable; but that's better than failing completely.  */
  99
 100 #define NO_REMAP
 101
 102 #endif /* __hpux or GNU_LINUX */
 103 \f
 104 /* Stuff for just GNU/Linux.  */
 105
 106 #ifdef GNU_LINUX
 107
 108 /* Data type of load average, as read out of kmem.  */
 109
 110 #define LOAD_AVE_TYPE long
 111
 112 /* Convert that into an integer that is 100 for a load average of 1.0  */
 113
 114 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
 115
 116 #endif /* GNU_LINUX */
 117 \f
 118 /* Stuff for just HPUX.  */
 119
 120 #ifdef __hpux
 121
 122 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 123    pure and impure space as loaded can vary, and even their
 124    relative order cannot be relied on.
 125
 126    Otherwise Emacs assumes that text space precedes data space,
 127    numerically.  */
 128
 129 #define VIRT_ADDR_VARIES
 130 \f
 131 /* the data segment on this machine always starts at address 0x40000000. */
 132
 133 #define DATA_SEG_BITS 0x40000000
 134
 135 #define DATA_START    0x40000000
 136 #define TEXT_START    0x00000000
 137
 138 /* This machine requires completely different unexec code
 139    which lives in a separate file.  Specify the file name.  */
 140
 141 #define UNEXEC unexhp9k800.o
 142
 143 #define LIBS_MACHINE
 144 #define LIBS_DEBUG
 145
 146 /* Include the file bsdtty.h, since this machine has job control.  */
 147 #define NEED_BSDTTY
 148
 149 /* Data type of load average, as read out of kmem.  */
 150
 151 #define LOAD_AVE_TYPE double
 152
 153 /* Convert that into an integer that is 100 for a load average of 1.0  */
 154
 155 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
 156
 157 /* The symbol in the kernel where the load average is found
 158    is named _avenrun.  At this time there are two major flavors
 159    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 160    differences are thusly moved to the corresponding machine description file.
 161 */
 162
 163 /* no underscore please */
 164 #define LDAV_SYMBOL "avenrun"
 165
 166 #if 0   /* Supposedly no longer true.  */
 167 /* In hpux, for unknown reasons, S_IFLNK is defined even though
 168    symbolic links do not exist.
 169    Make sure our conditionals based on S_IFLNK are not confused.
 170
 171    Here we assume that stat.h is included before config.h
 172    so that we can override it here.  */
 173
 174 #undef S_IFLNK
 175 #endif
 176
 177 /* On USG systems these have different names. */
 178
 179 #define index strchr
 180 #define rindex strrchr
 181
 182 #endif /* __hpux */