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

   1 /* machine description file for hp9000 series 800 machines.
   2    Copyright (C) 1987 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
  78 /* Define the BSTRING functions in terms of the sysV functions. */
  79 /* On HPUX 8.05, including types.h can include strings.h
  80    which declares these as functions.  Hence the #ifndef.  */
  81
  82 #ifndef HAVE_BCOPY
  83 #define bcopy(a,b,s)    memcpy (b,a,s)
  84 #define bzero(a,s)      memset (a,0,s)
  85 #define bcmp            memcmp
  86 #endif
  87 \f
  88 #ifdef __hpux
  89 /* Now define a symbol for the cpu type, if your compiler
  90    does not define it automatically:
  91    Ones defined so far include vax, m68000, ns16000, pyramid,
  92    orion, tahoe, APOLLO and many others */
  93 #ifndef hp9000s800
  94 #     define hp9000s800
  95 #endif
  96
  97 /* Data type of load average, as read out of kmem.  */
  98
  99 #define LOAD_AVE_TYPE double
 100
 101 /* Convert that into an integer that is 100 for a load average of 1.0  */
 102
 103 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
 104
 105
 106 /* Define CANNOT_DUMP on machines where unexec does not work.
 107    Then the function dump-emacs will not be defined
 108    and temacs will do (load "loadup") automatically unless told otherwise.  */
 109
 110 #undef CANNOT_DUMP
 111
 112 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 113    pure and impure space as loaded can vary, and even their
 114    relative order cannot be relied on.
 115
 116    Otherwise Emacs assumes that text space precedes data space,
 117    numerically.  */
 118
 119 #define VIRT_ADDR_VARIES
 120
 121 /* Define C_ALLOCA if this machine does not support a true alloca
 122    and the one written in C should be used instead.
 123    Define HAVE_ALLOCA to say that the system provides a properly
 124    working alloca function and it should be used.
 125    Define neither one if an assembler-language alloca
 126    in the file alloca.s should be used.  */
 127
 128 #define C_ALLOCA
 129 /* #define HAVE_ALLOCA */
 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 #define STACK_DIRECTION 1
 139
 140 /* Define NO_REMAP if memory segmentation makes it not work well
 141    to change the boundary between the text section and data section
 142    when Emacs is dumped.  If you define this, the preloaded Lisp
 143    code will not be sharable; but that's better than failing completely.  */
 144
 145 #define NO_REMAP
 146
 147 /* This machine requires completely different unexec code
 148    which lives in a separate file.  Specify the file name.  */
 149
 150 #define UNEXEC unexhp9k800.o
 151
 152 #define LIBS_MACHINE
 153 #define LIBS_DEBUG
 154
 155 /* Include the file bsdtty.h, since this machine has job control.  */
 156 #define NEED_BSDTTY
 157 \f
 158 /* The symbol in the kernel where the load average is found
 159    is named _avenrun.  At this time there are two major flavors
 160    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 161    differences are thusly moved to the corresponding machine description file.
 162 */
 163
 164 /* no underscore please */
 165 #define LDAV_SYMBOL "avenrun"
 166
 167 #if 0   /* Supposedly no longer true.  */
 168 /* In hpux, for unknown reasons, S_IFLNK is defined even though
 169    symbolic links do not exist.
 170    Make sure our conditionals based on S_IFLNK are not confused.
 171
 172    Here we assume that stat.h is included before config.h
 173    so that we can override it here.  */
 174
 175 #undef S_IFLNK
 176 #endif
 177
 178 /* On USG systems these have different names. */
 179
 180 #define index strchr
 181 #define rindex strrchr
 182
 183 #endif /* __hpux */