src/m/ia64.h

   1 /* machine description file for the IA-64 architecture.
   2    Copyright (C) 2000 Free Software Foundation, Inc.
   3      Contributed by David Mosberger <davidm@hpl.hp.com>
   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 1, or (at your option)
  10 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; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #define BITS_PER_LONG           64
  23 #define BITS_PER_EMACS_INT      64
  24
  25 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  26    is the most significant byte.  */
  27
  28 #undef 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 WORD_MACHINE if addresses and such have
  36    to be corrected before they can be used as byte counts.  */
  37
  38 /* #define WORD_MACHINE */
  39
  40 /* Now define a symbol for the cpu type, if your compiler
  41    does not define it automatically:
  42    Ones defined so far include vax, m68000, ns16000, pyramid,
  43    orion, tahoe, APOLLO and many others */
  44
  45 /* __ia64__ defined automatically */
  46
  47
  48 /* Use type EMACS_INT rather than a union, to represent Lisp_Object */
  49 /* This is desirable for most machines.  */
  50
  51 #define NO_UNION_TYPE
  52
  53 /* Define the type to use.  */
  54 #define EMACS_INT               long
  55 #define EMACS_UINT              unsigned long
  56 #define SPECIAL_EMACS_INT
  57
  58 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  59    the 24-bit bit field into an int.  In other words, if bit fields
  60    are always unsigned.
  61
  62    If you use NO_UNION_TYPE, this flag does not matter.  */
  63
  64 #define EXPLICIT_SIGN_EXTEND
  65
  66 /* Data type of load average, as read out of kmem.  */
  67
  68 #define LOAD_AVE_TYPE           long
  69
  70 /* Convert that into an integer that is 100 for a load average of 1.0  */
  71
  72 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  73
  74 /* Define CANNOT_DUMP on machines where unexec does not work.
  75    Then the function dump-emacs will not be defined
  76    and temacs will do (load "loadup") automatically unless told otherwise.  */
  77 #if 0
  78 #define CANNOT_DUMP
  79 #endif
  80
  81 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  82    pure and impure space as loaded can vary, and even their
  83    relative order cannot be relied on.
  84
  85    Otherwise Emacs assumes that text space precedes data space,
  86    numerically.  */
  87
  88 /* #define VIRT_ADDR_VARIES */
  89
  90 /* Define C_ALLOCA if this machine does not support a true alloca
  91    and the one written in C should be used instead.
  92    Define HAVE_ALLOCA to say that the system provides a properly
  93    working alloca function and it should be used.
  94    Define neither one if an assembler-language alloca
  95    in the file alloca.s should be used.  */
  96
  97 #define HAVE_ALLOCA
  98
  99 /* Define the following if GNU malloc and the relocating allocator do
 100    not work together with X.  */
 101
 102 /* #define SYSTEM_MALLOC */
 103
 104 /* Define NO_REMAP if memory segmentation makes it not work well
 105    to change the boundary between the text section and data section
 106    when Emacs is dumped.  If you define this, the preloaded Lisp
 107    code will not be sharable; but that's better than failing completely.  */
 108
 109 /* #define NO_REMAP */
 110
 111 /* Some really obscure 4.2-based systems (like Sequent DYNIX) do not
 112    support asynchronous I/O (using SIGIO) on sockets, even though it
 113    works fine on tty's.  If you have one of these systems, define the
 114    following, and then use it in config.h (or elsewhere) to decide
 115    when (not) to use SIGIO.
 116
 117    You'd think this would go in an operating-system description file,
 118    but since it only occurs on some, but not all, BSD systems, the
 119    reasonable place to select for it is in the machine description
 120    file.  */
 121
 122 /* #define NO_SOCK_SIGIO */
 123
 124 #ifdef __ELF__
 125 #undef UNEXEC
 126 #define UNEXEC unexelf.o
 127 #endif
 128
 129 #define PNTR_COMPARISON_TYPE unsigned long
 130
 131 /* On the 64 bit architecture, we can use 60 bits for addresses */
 132
 133 #define VALBITS         60
 134
 135 /* This definition of MARKBIT is necessary because of the comparison of
 136    ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */
 137
 138 #define MARKBIT         0x8000000000000000L
 139
 140 /* Define XINT and XUINT so that they can take arguments of type int */
 141
 142 #define XINT(a)  (((long) (a) << (BITS_PER_LONG - VALBITS)) >> (BITS_PER_LONG - VALBITS))
 143 #define XUINT(a) ((long) (a) & VALMASK)
 144
 145 /* Declare malloc and realloc in a way that is clean.
 146    But not in makefiles!  */
 147
 148 #ifndef NOT_C_CODE
 149 /* We need these because pointers are larger than the default ints.  */
 150 # if !defined(__NetBSD__) && !defined(__OpenBSD__)
 151 #  include <alloca.h>
 152 # else
 153 #  include <stdlib.h>
 154 # endif
 155
 156 /* We need to prototype these for the lib-src programs even if we don't
 157    use the system malloc for the Emacs proper.  */
 158 #ifdef _MALLOC_INTERNAL
 159 /* These declarations are designed to match the ones in gmalloc.c.  */
 160 #if defined (__STDC__) && __STDC__
 161 extern void *malloc (), *realloc (), *calloc ();
 162 #else
 163 extern char *malloc (), *realloc (), *calloc ();
 164 #endif
 165 #else /* not _MALLOC_INTERNAL */
 166 extern void *malloc (), *realloc (), *calloc ();
 167 #endif /* not _MALLOC_INTERNAL */
 168
 169 #ifdef REL_ALLOC
 170 #ifndef _MALLOC_INTERNAL
 171 /* "char *" because ralloc.c defines it that way.  gmalloc.c thinks it
 172    is allowed to prototype these as "void *" so we don't prototype in
 173    that case.  You're right: it stinks!  */
 174 extern char *r_alloc (), *r_re_alloc ();
 175 extern void r_alloc_free ();
 176 #endif /* not _MALLOC_INTERNAL */
 177 #endif /* REL_ALLOC */
 178
 179 #endif /* not NOT_C_CODE */
 180
 181 #define DATA_SEG_BITS   0x6000000000000000
 182
 183 #define HAVE_TEXT_START