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 /* Define how to take a char and sign-extend into an int.
  50    On machines where char is signed, this is a no-op.  */
  51
  52 #define SIGN_EXTEND_CHAR(c) (c)
  53
  54 /* Now define a symbol for the cpu type, if your compiler
  55    does not define it automatically:
  56    Ones defined so far include vax, m68000, ns16000, pyramid,
  57    orion, tahoe, APOLLO and many others */
  58 #ifndef hp9000s800
  59 #       define hp9000s800
  60 #endif
  61
  62 /* Use type int rather than a union, to represent Lisp_Object */
  63 /* This is desirable for most machines.  */
  64
  65 #define NO_UNION_TYPE
  66
  67 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  68    the 24-bit bit field into an int.  In other words, if bit fields
  69    are always unsigned.
  70
  71    If you use NO_UNION_TYPE, this flag does not matter.  */
  72
  73 #define EXPLICIT_SIGN_EXTEND
  74
  75 /* Data type of load average, as read out of kmem.  */
  76
  77 #define LOAD_AVE_TYPE double
  78
  79 /* Convert that into an integer that is 100 for a load average of 1.0  */
  80
  81 #define LOAD_AVE_CVT(x) ((int) (x * 100.0))
  82
  83
  84 /* Define CANNOT_DUMP on machines where unexec does not work.
  85    Then the function dump-emacs will not be defined
  86    and temacs will do (load "loadup") automatically unless told otherwise.  */
  87
  88 #undef CANNOT_DUMP
  89
  90 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  91    pure and impure space as loaded can vary, and even their
  92    relative order cannot be relied on.
  93
  94    Otherwise Emacs assumes that text space precedes data space,
  95    numerically.  */
  96
  97 #define VIRT_ADDR_VARIES
  98
  99 /* Define C_ALLOCA if this machine does not support a true alloca
 100    and the one written in C should be used instead.
 101    Define HAVE_ALLOCA to say that the system provides a properly
 102    working alloca function and it should be used.
 103    Define neither one if an assembler-language alloca
 104    in the file alloca.s should be used.  */
 105
 106 #define C_ALLOCA
 107 /* #define HAVE_ALLOCA */
 108 \f
 109 /* the data segment on this machine always starts at address 0x40000000. */
 110
 111 #define DATA_SEG_BITS 0x40000000
 112
 113 #define VALBITS    26
 114 #define GCTYPEBITS 5
 115
 116 #define DATA_START    0x40000000
 117 #define TEXT_START    0x00000000
 118
 119 #define STACK_DIRECTION 1
 120
 121 /* Define NO_REMAP if memory segmentation makes it not work well
 122    to change the boundary between the text section and data section
 123    when Emacs is dumped.  If you define this, the preloaded Lisp
 124    code will not be sharable; but that's better than failing completely.  */
 125
 126 #define NO_REMAP
 127
 128 /* This machine requires completely different unexec code
 129    which lives in a separate file.  Specify the file name.  */
 130
 131 #define UNEXEC unexhp9k800.o
 132
 133 #define LIBS_MACHINE
 134 #define LIBS_DEBUG
 135
 136 /* Define NEED_BSDTTY if you have such. */
 137
 138 #define NEED_BSDTTY
 139 \f
 140 /* The standard definitions of these macros would work ok,
 141    but these are faster because the constants are short. */
 142
 143
 144 #define XUINT(a) (((unsigned)(a) << INTBITS-VALBITS) >> INTBITS-VALBITS)
 145
 146 #define XSET(var, type, ptr) \
 147    ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << INTBITS-VALBITS) >> INTBITS-VALBITS))
 148
 149 #define XSETINT(a, b)  XSET(a, XTYPE(a), b)
 150 #define XSETUINT(a, b) XSET(a, XTYPE(a), b)
 151 #define XSETPNTR(a, b) XSET(a, XTYPE(a), b)
 152 #define XMARKBIT(a) ((a) < 0)
 153 #define XSETMARKBIT(a,b) ((a) = ((b) ? (a)|MARKBIT : (a) & ~MARKBIT))
 154
 155 #if 0  /* Loses when sign bit of type field is set.  */
 156 #define XUNMARK(a) ((a) = (((a) << INTBITS-GCTYPEBITS-VALBITS) >> INTBITS-GCTYPEBITS-VALBITS))
 157 #endif
 158
 159 /* The symbol in the kernel where the load average is found
 160    is named _avenrun.  At this time there are two major flavors
 161    of hp-ux (there is the s800 and s300 (s200) flavors).  The
 162    differences are thusly moved to the corresponding machine description file.
 163 */
 164
 165 /* no underscore please */
 166 #define LDAV_SYMBOL "avenrun"
 167 #define CPTIME_SYMBOL "cp_time"
 168 #define DKXFER_SYMBOL "dk_xfer"
 169
 170 #if 0   /* Supposedly no longer true.  */
 171 /* In hpux, for unknown reasons, S_IFLNK is defined even though
 172    symbolic links do not exist.
 173    Make sure our conditionals based on S_IFLNK are not confused.
 174
 175    Here we assume that stat.h is included before config.h
 176    so that we can override it here.  */
 177
 178 #undef S_IFLNK
 179 #endif
 180
 181 /* Define the BSTRING functions in terms of the sysV functions. */
 182
 183 #define bcopy(a,b,s)    memcpy (b,a,s)
 184 #define bzero(a,s)      memset (a,0,s)
 185 #define bcmp            memcmp
 186
 187 /* On USG systems these have different names. */
 188
 189 #define index strchr
 190 #define rindex strrchr
 191
 192 /* Include the file bsdtty.h, since this machine has job control.  */
 193 #define NEED_BSDTTY