src/m/iris4d.h

   1 /* machine description file for Iris-4D machines.  Use with s-iris3-6.h
   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="irix3-3"  */
  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) ((signed char)(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
  59 #ifndef mips
  60 #define mips
  61 #endif
  62
  63 #ifndef IRIS_4D
  64 #define IRIS_4D
  65 #endif
  66
  67 /* Use type int rather than a union, to represent Lisp_Object */
  68 /* This is desirable for most machines.  */
  69
  70 #define NO_UNION_TYPE
  71
  72 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  73    the 24-bit bit field into an int.  In other words, if bit fields
  74    are always unsigned.
  75
  76    If you use NO_UNION_TYPE, this flag does not matter.  */
  77
  78 #define EXPLICIT_SIGN_EXTEND
  79
  80 /* Data type of load average, as read out of kmem.  */
  81
  82 #define LOAD_AVE_TYPE long      /* This doesn't quite work on the 4D */
  83
  84 /* Convert that into an integer that is 100 for a load average of 1.0  */
  85
  86 #define LOAD_AVE_CVT(x) (int)(((double)(x)*100)/1024.0)
  87
  88 /* s-iris3-6.h uses /vmunix */
  89
  90 #undef KERNEL_FILE
  91 #define KERNEL_FILE "/unix"
  92
  93 /* Define CANNOT_DUMP on machines where unexec does not work.
  94    Then the function dump-emacs will not be defined
  95    and temacs will do (load "loadup") automatically unless told otherwise.  */
  96
  97 #undef CANNOT_DUMP
  98
  99 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 100    pure and impure space as loaded can vary, and even their
 101    relative order cannot be relied on.
 102
 103    Otherwise Emacs assumes that text space precedes data space,
 104    numerically.  */
 105
 106 /* #define VIRT_ADDR_VARIES */
 107
 108 /* Define C_ALLOCA if this machine does not support a true alloca
 109    and the one written in C should be used instead.
 110    Define HAVE_ALLOCA to say that the system provides a properly
 111    working alloca function and it should be used.
 112    Define neither one if an assembler-language alloca
 113    in the file alloca.s should be used.  */
 114
 115 #define C_ALLOCA
 116 /* #define HAVE_ALLOCA */
 117
 118 /* Define NO_REMAP if memory segmentation makes it not work well
 119    to change the boundary between the text section and data section
 120    when Emacs is dumped.  If you define this, the preloaded Lisp
 121    code will not be sharable; but that's better than failing completely.  */
 122
 123 #define NO_REMAP
 124
 125 /* This machine requires completely different unexec code
 126    which lives in a separate file.  Specify the file name.  */
 127
 128 #define UNEXEC unexmips.o
 129
 130 #define TEXT_START 0x400000
 131
 132 /*
 133  * DATA_SEG_BITS forces that bit to be or'd in with any pointers which
 134  * are trying to access pure strings (as gnu-emacs only allows 24 bits
 135  * for the value field of a LISP_OBJECT).
 136  */
 137
 138 #define DATA_START 0x10000000
 139 #define DATA_SEG_BITS   0x10000000
 140
 141 #undef LIBS_MACHINE
 142 /* -lsun in case using Yellow Pages for passwords.  */
 143 #define LIBS_MACHINE -lsun -lmld
 144 #define LIBS_DEBUG
 145
 146 /* Define this if you have a fairly recent system,
 147    in which crt1.o and crt1.n should be used.  */
 148 #define HAVE_CRTN
 149
 150 #ifdef HAVE_CRTN
 151 /* Must define START-FILES so that the linker can find /usr/lib/crt0.o.  */
 152 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 153 #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
 154 #else
 155 #define START_FILES pre-crt0.o /usr/lib/crt0.o
 156 /* The entry-point label (start of text segment) is `start', not `__start'.  */
 157 #define DEFAULT_ENTRY_ADDRESS start
 158 #define LIB_STANDARD -lbsd -lc
 159 #endif
 160 \f
 161 /* Use terminfo instead of termcap.  */
 162
 163 #define TERMINFO
 164
 165 /* sioctl.h should be included where appropriate.  */
 166
 167 #define NEED_SIOCTL
 168
 169 /* Letter to use in finding device name of first pty,
 170   if system supports pty's.  'a' means it is /dev/ptya0  */
 171
 172 #undef FIRST_PTY_LETTER
 173 #define FIRST_PTY_LETTER 'q'
 174
 175 /* Define STACK_DIRECTION for alloca.c */
 176
 177 #define STACK_DIRECTION -1
 178 \f
 179 /* The standard definitions of these macros would work ok,
 180    but these are faster because the constants are short.  */
 181
 182 #define XUINT(a) (((unsigned)(a) << INTBITS-VALBITS) >> INTBITS-VALBITS)
 183
 184 #define XSET(var, type, ptr) \
 185    ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << INTBITS-VALBITS) >> INTBITS-VALBITS))
 186
 187 #define XSETINT(a, b)  XSET(a, XTYPE(a), b)
 188 #define XSETUINT(a, b) XSET(a, XTYPE(a), b)
 189 #define XSETPNTR(a, b) XSET(a, XTYPE(a), b)
 190
 191 #define XMARKBIT(a) ((a) < 0)
 192 #define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | ((b) ? MARKBIT : 0))
 193 #define XUNMARK(a) ((a) = (((unsigned)(a) << INTBITS-GCTYPEBITS-VALBITS) >> INTBITS-GCTYPEBITS-VALBITS))
 194
 195 /* Turn off some "helpful" error checks for type mismatches
 196    that we can't fix without breaking other machines.  */
 197 #define C_SWITCH_MACHINE -cckr