src/m/iris4d.h

   1 /* machine description file for Iris-4D machines.  Use with s/irix*.h.
   2    Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008  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 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  22    is the most significant byte.  */
  23
  24 #define WORDS_BIG_ENDIAN
  25
  26 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  27  * group of arguments and treat it as an array of the arguments.  */
  28
  29 #define NO_ARG_ARRAY
  30
  31 /* Define WORD_MACHINE if addresses and such have
  32  * to be corrected before they can be used as byte counts.  */
  33
  34 #undef WORD_MACHINE
  35
  36 /* Now define a symbol for the cpu type, if your compiler
  37    does not define it automatically:
  38    Ones defined so far include vax, m68000, ns16000, pyramid,
  39    orion, tahoe, APOLLO and many others */
  40
  41 #ifndef mips
  42 #define mips
  43 #endif
  44
  45 #ifndef IRIS_4D
  46 #define IRIS_4D
  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 /* jg@genmagic.genmagic.com (John Giannandrea) says this is unnecessary.  */
  63 #if 0
  64 /* Data type of load average, as read out of kmem.  */
  65
  66 #define LOAD_AVE_TYPE long      /* This doesn't quite work on the 4D */
  67
  68 /* Convert that into an integer that is 100 for a load average of 1.0  */
  69
  70 #define LOAD_AVE_CVT(x) (int)(((double)(x)*100)/1024.0)
  71
  72 /* s-iris3-6.h uses /vmunix */
  73
  74 #undef KERNEL_FILE
  75 #define KERNEL_FILE "/unix"
  76 #endif
  77
  78 /* Define CANNOT_DUMP on machines where unexec does not work.
  79    Then the function dump-emacs will not be defined
  80    and temacs will do (load "loadup") automatically unless told otherwise.  */
  81
  82 #undef CANNOT_DUMP
  83
  84 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  85    pure and impure space as loaded can vary, and even their
  86    relative order cannot be relied on.
  87
  88    Otherwise Emacs assumes that text space precedes data space,
  89    numerically.  */
  90
  91 /* #define VIRT_ADDR_VARIES */
  92
  93 /* Define NO_REMAP if memory segmentation makes it not work well
  94    to change the boundary between the text section and data section
  95    when Emacs is dumped.  If you define this, the preloaded Lisp
  96    code will not be sharable; but that's better than failing completely.  */
  97
  98 #define NO_REMAP
  99
 100 /* This machine requires completely different unexec code
 101    which lives in a separate file.  Specify the file name.  */
 102
 103 #ifdef USG5_4
 104 #undef UNEXEC
 105 #define UNEXEC unexelf.o
 106 #else
 107 #define UNEXEC unexmips.o
 108 #endif
 109
 110 #define TEXT_START 0x400000
 111
 112 /*
 113  * DATA_SEG_BITS forces extra bits to be or'd in with any pointers which
 114  * were stored in a Lisp_Object (as Emacs uses fewer than 32 bits for
 115  * the value field of a LISP_OBJECT).
 116  */
 117
 118 #define DATA_START 0x10000000
 119 #define DATA_SEG_BITS   0x10000000
 120
 121 #undef LIBS_MACHINE
 122 #define LIBS_MACHINE
 123 #define LIBS_DEBUG
 124
 125 /* Define this if you have a fairly recent system,
 126    in which crt1.o and crt1.n should be used.  */
 127 #define HAVE_CRTN
 128
 129 #ifndef USG5_4
 130 #ifdef HAVE_CRTN
 131 /* Must define START-FILES so that the linker can find /usr/lib/crt0.o.  */
 132 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 133 #define LIB_STANDARD -lc /usr/lib/crtn.o
 134 #else
 135 #define START_FILES pre-crt0.o /usr/lib/crt0.o
 136 /* The entry-point label (start of text segment) is `start', not `__start'.  */
 137 #define DEFAULT_ENTRY_ADDRESS start
 138 #define LIB_STANDARD -lc
 139 #endif
 140 #endif
 141 \f
 142 /* Use terminfo instead of termcap.  */
 143
 144 #define TERMINFO
 145
 146 /* Letter to use in finding device name of first pty,
 147   if system supports pty's.  'a' means it is /dev/ptya0  */
 148
 149 #undef FIRST_PTY_LETTER
 150 #define FIRST_PTY_LETTER 'q'
 151 \f
 152 #if _MIPS_SZLONG != 64
 153 /* fixme: should there be 64-bit defiitions?  (The ones below aren't
 154    OK.)  */
 155
 156 /* The standard definitions of these macros would work ok,
 157    but these are faster because the constants are short.  */
 158
 159 #define XUINT(a) (((unsigned)(a) << BITS_PER_INT-VALBITS) >> BITS_PER_INT-VALBITS)
 160
 161 #define XSET(var, type, ptr) \
 162    ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << BITS_PER_INT-VALBITS) >> BITS_PER_INT-VALBITS))
 163 #endif /* _LP64 */
 164
 165 /* arch-tag: fff5e139-9ae0-465d-afec-837c41ea0aa6
 166    (do not change this comment) */