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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  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 /* The following three symbols give information on
  26  the size of various data types.  */
  27
  28 #define SHORTBITS 16            /* Number of bits in a short */
  29
  30 #define INTBITS 32              /* Number of bits in an int */
  31
  32 #define LONGBITS 32             /* Number of bits in a long */
  33
  34 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  35    is the most significant byte.  */
  36
  37 #define BIG_ENDIAN
  38
  39 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  40  * group of arguments and treat it as an array of the arguments.  */
  41
  42 #define NO_ARG_ARRAY
  43
  44 /* Define WORD_MACHINE if addresses and such have
  45  * to be corrected before they can be used as byte counts.  */
  46
  47 #undef WORD_MACHINE
  48
  49 /* Now define a symbol for the cpu type, if your compiler
  50    does not define it automatically:
  51    Ones defined so far include vax, m68000, ns16000, pyramid,
  52    orion, tahoe, APOLLO and many others */
  53 #ifndef hp9000s800
  54 #       define hp9000s800
  55 #endif
  56
  57 /* Use type int rather than a union, to represent Lisp_Object */
  58 /* This is desirable for most machines.  */
  59
  60 #define NO_UNION_TYPE
  61
  62 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  63    the 24-bit bit field into an int.  In other words, if bit fields
  64    are always unsigned.
  65
  66    If you use NO_UNION_TYPE, this flag does not matter.  */
  67
  68 #define EXPLICIT_SIGN_EXTEND
  69
  70 /* Data type of load average, as read out of kmem.  */
  71
  72 #define LOAD_AVE_TYPE double
  73
  74 /* Convert that into an integer that is 100 for a load average of 1.0  */
  75
  76 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
  77
  78
  79 /* Define CANNOT_DUMP on machines where unexec does not work.
  80    Then the function dump-emacs will not be defined
  81    and temacs will do (load "loadup") automatically unless told otherwise.  */
  82
  83 #undef CANNOT_DUMP
  84
  85 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  86    pure and impure space as loaded can vary, and even their
  87    relative order cannot be relied on.
  88
  89    Otherwise Emacs assumes that text space precedes data space,
  90    numerically.  */
  91
  92 #define VIRT_ADDR_VARIES
  93
  94 /* Define C_ALLOCA if this machine does not support a true alloca
  95    and the one written in C should be used instead.
  96    Define HAVE_ALLOCA to say that the system provides a properly
  97    working alloca function and it should be used.
  98    Define neither one if an assembler-language alloca
  99    in the file alloca.s should be used.  */
 100
 101 #define C_ALLOCA
 102 /* #define HAVE_ALLOCA */
 103 \f
 104 /* the data segment on this machine always starts at address 0x40000000. */
 105
 106 #define DATA_SEG_BITS 0x40000000
 107
 108 #define VALBITS    26
 109 #define GCTYPEBITS 5
 110
 111 #define DATA_START    0x40000000
 112 #define TEXT_START    0x00000000
 113
 114 #define STACK_DIRECTION 1
 115
 116 /* Define NO_REMAP if memory segmentation makes it not work well
 117    to change the boundary between the text section and data section
 118    when Emacs is dumped.  If you define this, the preloaded Lisp
 119    code will not be sharable; but that's better than failing completely.  */
 120
 121 #define NO_REMAP
 122
 123 /* This machine requires completely different unexec code
 124    which lives in a separate file.  Specify the file name.  */
 125
 126 #define UNEXEC unexhp9k800.o
 127
 128 #define LIBS_MACHINE
 129 #define LIBS_DEBUG
 130
 131 /* Define NEED_BSDTTY if you have such. */
 132
 133 #define NEED_BSDTTY
 134 \f
 135 /* The standard definitions of these macros would work ok,
 136    but these are faster because the constants are short. */
 137
 138
 139 #define XUINT(a) (((unsigned)(a) << INTBITS-VALBITS) >> INTBITS-VALBITS)
 140
 141 #define XSET(var, type, ptr) \
 142    ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << INTBITS-VALBITS) >> INTBITS-VALBITS))
 143
 144 #define XSETINT(a, b)  XSET(a, XTYPE(a), b)
 145 #define XSETUINT(a, b) XSET(a, XTYPE(a), b)
 146 #define XSETPNTR(a, b) XSET(a, XTYPE(a), b)
 147 #define XMARKBIT(a) ((a) < 0)
 148 #define XSETMARKBIT(a,b) ((a) = ((b) ? (a)|MARKBIT : (a) & ~MARKBIT))
 149
 150 #if 0  /* Loses when sign bit of type field is set.  */
 151 #define XUNMARK(a) ((a) = (((a) << INTBITS-GCTYPEBITS-VALBITS) >> INTBITS-GCTYPEBITS-VALBITS))
 152 #endif
 153
 154 /* The symbol in the kernel where the load average is found
 155    is named _avenrun.  At this time there are two major flavors
 156    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 157    differences are thusly moved to the corresponding machine description file.
 158 */
 159
 160 /* no underscore please */
 161 #define LDAV_SYMBOL "avenrun"
 162 #define CPTIME_SYMBOL "cp_time"
 163 #define DKXFER_SYMBOL "dk_xfer"
 164
 165 #if 0   /* Supposedly no longer true.  */
 166 /* In hpux, for unknown reasons, S_IFLNK is defined even though
 167    symbolic links do not exist.
 168    Make sure our conditionals based on S_IFLNK are not confused.
 169
 170    Here we assume that stat.h is included before config.h
 171    so that we can override it here.  */
 172
 173 #undef S_IFLNK
 174 #endif
 175
 176 /* Define the BSTRING functions in terms of the sysV functions. */
 177
 178 #define bcopy(a,b,s)    memcpy (b,a,s)
 179 #define bzero(a,s)      memset (a,0,s)
 180 #define bcmp            memcmp
 181
 182 /* On USG systems these have different names. */
 183
 184 #define index strchr
 185 #define rindex strrchr
 186
 187 /* Include the file bsdtty.h, since this machine has job control.  */
 188 #define NEED_BSDTTY