src/m/hp800.h

   1 /* machine description file for hp9000 series 800 machines.
   2    Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008, 2009, 2010  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 3 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 /* The following line tells the configuration script what sort of
  22    operating system this machine is likely to run.
  23    USUAL-OPSYS="hpux"  */
  24
  25 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  26    is the most significant byte.  */
  27
  28 #define WORDS_BIG_ENDIAN
  29
  30 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  31  * group of arguments and treat it as an array of the arguments.  */
  32
  33 #define NO_ARG_ARRAY
  34
  35 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  36    the bit field into an int.  In other words, if bit fields
  37    are always unsigned.
  38
  39    This flag only matters if you use USE_LISP_UNION_TYPE.  */
  40
  41 #define EXPLICIT_SIGN_EXTEND
  42
  43 \f
  44 /* Common definitions for HPUX and GNU/Linux.  */
  45
  46 #if defined (__hpux) || defined (GNU_LINUX)
  47
  48 /* Define NO_REMAP if memory segmentation makes it not work well
  49    to change the boundary between the text section and data section
  50    when Emacs is dumped.  If you define this, the preloaded Lisp
  51    code will not be sharable; but that's better than failing completely.  */
  52
  53 #define NO_REMAP
  54
  55 #endif /* __hpux or GNU_LINUX */
  56 \f
  57 /* Stuff for just GNU/Linux.  */
  58
  59 #ifdef GNU_LINUX
  60
  61 /* Data type of load average, as read out of kmem.  */
  62
  63 #define LOAD_AVE_TYPE long
  64
  65 /* Convert that into an integer that is 100 for a load average of 1.0  */
  66
  67 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  68
  69 #endif /* GNU_LINUX */
  70 \f
  71 /* Stuff for just HPUX.  */
  72
  73 #ifdef __hpux
  74
  75 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  76    pure and impure space as loaded can vary, and even their
  77    relative order cannot be relied on.
  78
  79    Otherwise Emacs assumes that text space precedes data space,
  80    numerically.  */
  81
  82 #define VIRT_ADDR_VARIES
  83 \f
  84 /* the data segment on this machine always starts at address 0x40000000. */
  85
  86 #define DATA_SEG_BITS 0x40000000
  87
  88 #define DATA_START    0x40000000
  89 #define TEXT_START    0x00000000
  90
  91 /* This machine requires completely different unexec code
  92    which lives in a separate file.  Specify the file name.  */
  93
  94 #define UNEXEC unexhp9k800.o
  95
  96 #define LIBS_MACHINE
  97 #define LIBS_DEBUG
  98
  99 /* Include the file bsdtty.h, since this machine has job control.  */
 100 #define NEED_BSDTTY
 101
 102 /* Data type of load average, as read out of kmem.  */
 103
 104 #define LOAD_AVE_TYPE double
 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) (x * 100.0))
 109
 110 /* The symbol in the kernel where the load average is found
 111    is named _avenrun.  At this time there are two major flavors
 112    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 113    differences are thusly moved to the corresponding machine description file.
 114 */
 115
 116 /* no underscore please */
 117 #define LDAV_SYMBOL "avenrun"
 118
 119 /* On USG systems these have different names. */
 120
 121 #define index strchr
 122 #define rindex strrchr
 123
 124 #endif /* __hpux */
 125 \f
 126 /* Systems with GCC don't need to lose. */
 127 #ifdef __NetBSD__
 128 # ifdef __GNUC__
 129 #  define alloca __builtin_alloca
 130 #  define HAVE_ALLOCA
 131 # endif /* __GNUC__ */
 132 #endif /* __NetBSD__ */
 133
 134 /* arch-tag: 809436e6-1645-4b92-b40d-2de5d6e7227c
 135    (do not change this comment) */