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1 /* machine description file For the alpha chip.
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2 Copyright (C) 1994 Free Software Foundation, Inc.
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3
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4 This file is part of GNU Emacs.
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5
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6 GNU Emacs is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 1, or (at your option)
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9 any later version.
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10
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11 GNU Emacs is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: FSF 19.31. */
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22
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23 /* The following line tells the configuration script what sort of
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24 operating system this machine is likely to run.
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25 USUAL-OPSYS="note"
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26
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27 NOTE-START
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28 Use -opsystem=osf1
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29 NOTE-END
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30
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31 */
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32
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33 #define DEC_ALPHA /* Digital Alpha AXP */
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34
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35 /* Define WORD_MACHINE if addresses and such have
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36 * to be corrected before they can be used as byte counts. */
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37
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38 /* #define WORD_MACHINE */
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39
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40 /* XEmacs addition: is this necessary? */
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41
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42 /* XEmacs: Apparently not Andrew Cohen 8/24/95 */
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43 /* Define how to take a char and sign-extend into an int.
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44 On machines where char is signed, this is a no-op. */
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45
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46 /* #define SIGN_EXTEND_CHAR(c) ((signed char)(c)) */
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47
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48 /* Now define a symbol for the cpu type, if your compiler
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49 does not define it automatically:
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50 Ones defined so far include vax, m68000, ns16000, pyramid,
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51 orion, tahoe, APOLLO and many others */
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52
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53 /* __alpha defined automatically */
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54
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55
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56 /* Use type EMACS_INT rather than a union, to represent Lisp_Object */
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57 /* This is desirable for most machines. */
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58
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59 /* XEmacs change: something is not quite right with this defined. */
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60 /* I'm sure this is because VALBITS is defined to be 28 instead of 60.
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61 --ben */
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62 #undef NO_UNION_TYPE
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63
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64 /* Define the type to use. */
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65 #define EMACS_INT long
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66 #define EMACS_UINT unsigned long
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67 #define SPECIAL_EMACS_INT
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68
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69 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
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70 the bit field into an int. In other words, if bit fields
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71 are always unsigned.
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72
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73 If you use NO_UNION_TYPE, this flag does not matter. */
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74
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75 #define EXPLICIT_SIGN_EXTEND
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76
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77 /* Data type of load average, as read out of kmem. */
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78 /* Load average requires special crocks. Version 19 has them.
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79 For now, don't define this. */
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80
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81 #define LOAD_AVE_TYPE long
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82
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83 /* Convert that into an integer that is 100 for a load average of 1.0 */
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84
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85 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
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86
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87 /* Define CANNOT_DUMP on machines where unexec does not work.
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88 Then the function dump-emacs will not be defined
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89 and temacs will do (load "loadup") automatically unless told otherwise. */
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90
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91 /* #define CANNOT_DUMP */
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92
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93 /* Define VIRT_ADDR_VARIES if the virtual addresses of
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94 pure and impure space as loaded can vary, and even their
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95 relative order cannot be relied on.
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96
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97 Otherwise Emacs assumes that text space precedes data space,
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98 numerically. */
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99
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100 /* #define VIRT_ADDR_VARIES */
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101
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102 /* Define C_ALLOCA if this machine does not support a true alloca
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103 and the one written in C should be used instead.
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104 Define HAVE_ALLOCA to say that the system provides a properly
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105 working alloca function and it should be used.
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106 Define neither one if an assembler-language alloca
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107 in the file alloca.s should be used. */
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108
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109 #define HAVE_ALLOCA
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110
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111 /* GNU malloc and the relocating allocator do not work together
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112 with X. [Who wrote that?] */
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113
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114 /* May 1995: reportedly [Rainer Schoepf <schoepf@uni-mainz.de>] both the
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115 system and the gnu malloc system work with "alpha-dec-osf3.0" and
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116 "alpha-dec-osf3.2". */
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117
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118 /* May 1995: it seems to me [Morten Welinder <terra@diku.dk>] that both
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119 mallocs work with "alpha-dec-osf2.0", but I daren't break anything
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120 right now. Feel free to play if you want. */
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121
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122 /* #define SYSTEM_MALLOC */
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123
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124 /* Define NO_REMAP if memory segmentation makes it not work well
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125 to change the boundary between the text section and data section
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126 when Emacs is dumped. If you define this, the preloaded Lisp
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127 code will not be sharable; but that's better than failing completely. */
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128
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129 /* #define NO_REMAP */
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130
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131 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
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132 * do not support asynchronous I/O (using SIGIO) on sockets,
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133 * even though it works fine on tty's. If you have one of
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134 * these systems, define the following, and then use it in
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135 * config.h (or elsewhere) to decide when (not) to use SIGIO.
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136 *
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137 * You'd think this would go in an operating-system description file,
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138 * but since it only occurs on some, but not all, BSD systems, the
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139 * reasonable place to select for it is in the machine description
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140 * file.
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141 */
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142
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143 /* #define NO_SOCK_SIGIO */
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144
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145
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146 #define HAVE_X11R4
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147 #define HAVE_X11R5
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148
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149
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150 /* Describe layout of the address space in an executing process. */
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151
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152 #define TEXT_START 0x120000000
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153 #define DATA_START 0x140000000
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154
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155 #if 0 /* #### XEmacs: see below */
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156 /* This is necessary for mem-limits.h, so that start_of_data gives
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157 the correct value */
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158 #define DATA_SEG_BITS 0x140000000
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159 #endif /* 0 */
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160
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161 #ifdef OSF1
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162 #define ORDINARY_LINK
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163 #endif /* OSF1 */
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164
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165 #if 0 /* Rainer Schoepf <schoepf@uni-mainz.de> says this loses with X11R6
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166 since it has only shared libraries. */
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167 #ifndef __GNUC__
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168 /* This apparently is for the system ld as opposed to Gnu ld. */
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169 #ifdef OSF1
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163
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170 #define LD_SWITCH_MACHINE "-non_shared"
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0
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171 #endif /* OSF1 */
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172 #endif /* not __GNUC__ */
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173 #endif /* 0 */
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174
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175 #ifdef OSF1
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176 #define LIBS_DEBUG
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163
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177 #define START_FILES "pre-crt0.o "
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0
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178 #endif /* OSF1 */
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179
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180 #ifdef LINUX
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181 /* This controls a conditional in main. */
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182 #define LINUX_SBRK_BUG
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183 #endif /* LINUX */
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184
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185 /* The program to be used for unexec. */
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186
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163
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187 #define UNEXEC "unexalpha.o"
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0
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188
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189 #if 0
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190
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191 /* XEmacs -- removed code to define XINT, etc. This gets
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192 correctly handled automatically. */
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193
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194 /* Declare malloc and realloc in a way that is clean.
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195 But not in makefiles! */
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196
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197 #ifndef NOT_C_CODE
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198 /* We need these because pointers are larger than the default ints. */
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199 #include <alloca.h>
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200 #endif /* not NOT_C_CODE */
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201
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202 #endif /* 0 */
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203
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204 #ifdef OSF1
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205 #define PTY_ITERATION for (i = 0; i < 1; i++) /* ick */
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206 #define PTY_NAME_SPRINTF /* none */
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207 #define PTY_TTY_NAME_SPRINTF /* none */
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208 #define PTY_OPEN \
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209 do \
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210 { \
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211 int dummy; \
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212 int mask = sigsetmask (SIGCHLD); \
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213 if (-1 == openpty (&fd, &dummy, pty_name, 0, 0)) \
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214 fd = -1; \
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215 sigsetmask (mask); \
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216 close (dummy); \
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217 } \
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218 while (0)
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219 #endif /* OSF1 */
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220
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221 #ifdef linux
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222 #define COFF
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223 #define TEXT_END ({ extern int _etext; &_etext; })
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224 #define DATA_END ({ extern int _EDATA; &_EDATA; })
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225 #endif /* linux */
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226
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227 /* XEmacs: The Dec CC compiler (but apparently not GCC, which uses different
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228 macros due to its own compiler bug) breaks spectacularly
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229 when MACROIZE_ERROR_CHECKING is turned on. */
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230 #define BROKEN_MACROIZE_ERROR_CHECKING
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231
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232 /* XEmacs: from Andrew Cohen based on this comment found in <termio.h>:
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233
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234 Unfortunately System V and POSIX have different values for some of
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235 the defines. So we have to perform the following kluge which
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236 redefines the V___ values for termio. This means you cannot do
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237 ioctls using termios and termio in the same source file.
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238 */
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175
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239 /* #define NO_TERMIO */ /* mrb */
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