src/m/mips-siemens.h

   1 /* m- file for Mips machines.
   2    Copyright (C) 1987, 1992, 1993, 1995, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007  Free Software Foundation, Inc.
   4
   5    This file contains some changes for our SVR4 based SINIX-Mips 5.4.
   6    I hope this is helpful to port the emacs to our RM?00 series and
   7    maybe to the DC/OSx (Mips-based) machines of Pyramid Inc.
   8      (Marco.Walther@mch.sni.de)
   9
  10 This file is part of GNU Emacs.
  11
  12 GNU Emacs is free software; you can redistribute it and/or modify
  13 it under the terms of the GNU General Public License as published by
  14 the Free Software Foundation; either version 2, or (at your option)
  15 any later version.
  16
  17 GNU Emacs is distributed in the hope that it will be useful,
  18 but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 GNU General Public License for more details.
  21
  22 You should have received a copy of the GNU General Public License
  23 along with GNU Emacs; see the file COPYING.  If not, write to
  24 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  25 Boston, MA 02110-1301, USA.  */
  26
  27
  28 /* The following line tells the configuration script what sort of
  29    operating system this machine is likely to run.
  30    USUAL-OPSYS="note"
  31
  32 NOTE-START
  33 Use m-mips4.h for RISCOS version 4; use s-bsd4-3.h with the BSD world.
  34 Note that the proper m- file for the Decstation is m-pmax.h.
  35 This is the m- file for SNI RM*00 machines. Use s- sinix5-4.h file!
  36 With this the file mips-siemens.h is obsolete.
  37 NOTE-END  */
  38
  39 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  40    is the most significant byte.  */
  41
  42 #define BIG_ENDIAN
  43
  44 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  45  * group of arguments and treat it as an array of the arguments.  */
  46
  47 #define NO_ARG_ARRAY
  48
  49 /* Define WORD_MACHINE if addresses and such have
  50  * to be corrected before they can be used as byte counts.  */
  51
  52 #undef WORD_MACHINE
  53
  54 /* Define how to take a char and sign-extend into an int.
  55    On machines where char is signed, this is a no-op.  */
  56
  57 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  58
  59 /* Now define a symbol for the cpu type, if your compiler
  60    does not define it automatically:
  61    Ones defined so far include vax, m68000, ns16000, pyramid,
  62    orion, tahoe, APOLLO and many others */
  63 #ifndef mips
  64 #       define mips
  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
  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)) * 100.0 / 256.0)
  87
  88 /* CDC EP/IX 1.4.3 uses /unix */
  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 NO_REMAP if memory segmentation makes it not work well
 109    to change the boundary between the text section and data section
 110    when Emacs is dumped.  If you define this, the preloaded Lisp
 111    code will not be sharable; but that's better than failing completely.  */
 112
 113 #define NO_REMAP
 114
 115 /* Describe layout of the address space in an executing process.  */
 116 /* MARCO ???
 117 */
 118 #define TEXT_START 0x400000
 119 /*
 120 #define DATA_START 0x10000000
 121 #define DATA_SEG_BITS   0x10000000
 122 */
 123 #ifdef UNEXEC
 124 #undef UNEXEC
 125 #endif
 126 #define UNEXEC unexsni.o
 127
 128 #undef ORDINARY_LINK
 129
 130 #undef LIBS_DEBUG
 131
 132 /* Alter some of the options used when linking.  */
 133
 134 #define LIBS_MACHINE -lmld
 135 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
 136
 137 #ifdef LIB_STANDARD
 138 #undef LIB_STANDARD
 139 #endif
 140 #define LIB_STANDARD -lc /usr/ccs/lib/crtn.o
 141
 142 #ifdef __GNUC__
 143 #define C_DEBUG_SWITCH
 144 #define LD_SWITCH_MACHINE
 145 #else
 146 #define C_DEBUG_SWITCH -DSYSV
 147 #define C_OPTIMIZE_SWITCH -DSYSV
 148 #define LD_SWITCH_MACHINE
 149 #endif
 150
 151 \f
 152 /* The standard definitions of these macros would work ok,
 153    but these are faster because the constants are short.  */
 154
 155 #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
 156
 157 #define XSET(var, type, ptr)                                            \
 158   ((var) =                                                              \
 159    ((int)(type) << VALBITS)                                             \
 160    + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
 161
 162 /* arch-tag: a4f5c090-0bd5-48f0-9724-b7d531f9b6c8
 163    (do not change this comment) */