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comparison src/m/alpha.h @ 0:376386a54a3c r19-14

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Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
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1 /* machine description file For the alpha chip.
2 Copyright (C) 1994 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 XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: FSF 19.31. */
22
23 /* The following line tells the configuration script what sort of
24 operating system this machine is likely to run.
25 USUAL-OPSYS="note"
26
27 NOTE-START
28 Use -opsystem=osf1
29 NOTE-END
30
31 */
32
33 #define DEC_ALPHA /* Digital Alpha AXP */
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 /* XEmacs addition: is this necessary? */
41
42 /* XEmacs: Apparently not Andrew Cohen 8/24/95 */
43 /* Define how to take a char and sign-extend into an int.
44 On machines where char is signed, this is a no-op. */
45
46 /* #define SIGN_EXTEND_CHAR(c) ((signed char)(c)) */
47
48 /* Now define a symbol for the cpu type, if your compiler
49 does not define it automatically:
50 Ones defined so far include vax, m68000, ns16000, pyramid,
51 orion, tahoe, APOLLO and many others */
52
53 /* __alpha defined automatically */
54
55
56 /* Use type EMACS_INT rather than a union, to represent Lisp_Object */
57 /* This is desirable for most machines. */
58
59 /* XEmacs change: something is not quite right with this defined. */
60 /* I'm sure this is because VALBITS is defined to be 28 instead of 60.
61 --ben */
62 #undef NO_UNION_TYPE
63
64 /* Define the type to use. */
65 #define EMACS_INT long
66 #define EMACS_UINT unsigned long
67 #define SPECIAL_EMACS_INT
68
69 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
70 the bit field into an int. In other words, if bit fields
71 are always unsigned.
72
73 If you use NO_UNION_TYPE, this flag does not matter. */
74
75 #define EXPLICIT_SIGN_EXTEND
76
77 /* Data type of load average, as read out of kmem. */
78 /* Load average requires special crocks. Version 19 has them.
79 For now, don't define this. */
80
81 #define LOAD_AVE_TYPE long
82
83 /* Convert that into an integer that is 100 for a load average of 1.0 */
84
85 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
86
87 /* Define CANNOT_DUMP on machines where unexec does not work.
88 Then the function dump-emacs will not be defined
89 and temacs will do (load "loadup") automatically unless told otherwise. */
90
91 /* #define CANNOT_DUMP */
92
93 /* Define VIRT_ADDR_VARIES if the virtual addresses of
94 pure and impure space as loaded can vary, and even their
95 relative order cannot be relied on.
96
97 Otherwise Emacs assumes that text space precedes data space,
98 numerically. */
99
100 /* #define VIRT_ADDR_VARIES */
101
102 /* Define C_ALLOCA if this machine does not support a true alloca
103 and the one written in C should be used instead.
104 Define HAVE_ALLOCA to say that the system provides a properly
105 working alloca function and it should be used.
106 Define neither one if an assembler-language alloca
107 in the file alloca.s should be used. */
108
109 #define HAVE_ALLOCA
110
111 /* GNU malloc and the relocating allocator do not work together
112 with X. [Who wrote that?] */
113
114 /* May 1995: reportedly [Rainer Schoepf <schoepf@uni-mainz.de>] both the
115 system and the gnu malloc system work with "alpha-dec-osf3.0" and
116 "alpha-dec-osf3.2". */
117
118 /* May 1995: it seems to me [Morten Welinder <terra@diku.dk>] that both
119 mallocs work with "alpha-dec-osf2.0", but I daren't break anything
120 right now. Feel free to play if you want. */
121
122 /* #define SYSTEM_MALLOC */
123
124 /* Define NO_REMAP if memory segmentation makes it not work well
125 to change the boundary between the text section and data section
126 when Emacs is dumped. If you define this, the preloaded Lisp
127 code will not be sharable; but that's better than failing completely. */
128
129 /* #define NO_REMAP */
130
131 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
132 * do not support asynchronous I/O (using SIGIO) on sockets,
133 * even though it works fine on tty's. If you have one of
134 * these systems, define the following, and then use it in
135 * config.h (or elsewhere) to decide when (not) to use SIGIO.
136 *
137 * You'd think this would go in an operating-system description file,
138 * but since it only occurs on some, but not all, BSD systems, the
139 * reasonable place to select for it is in the machine description
140 * file.
141 */
142
143 /* #define NO_SOCK_SIGIO */
144
145
146 #define HAVE_X11R4
147 #define HAVE_X11R5
148
149
150 /* Describe layout of the address space in an executing process. */
151
152 #define TEXT_START 0x120000000
153 #define DATA_START 0x140000000
154
155 #if 0 /* #### XEmacs: see below */
156 /* This is necessary for mem-limits.h, so that start_of_data gives
157 the correct value */
158 #define DATA_SEG_BITS 0x140000000
159 #endif /* 0 */
160
161 #ifdef OSF1
162 #define ORDINARY_LINK
163 /* Some systems seem to have this, others don't. */
164 #ifdef HAVE_LIBDNET
165 #define LIBS_MACHINE -ldnet
166 #else
167 #define LIBS_MACHINE -ldnet_stub
168 #endif /* HAVE_LIBDNET */
169 #endif /* OSF1 */
170
171 #if 0 /* Rainer Schoepf <schoepf@uni-mainz.de> says this loses with X11R6
172 since it has only shared libraries. */
173 #ifndef __GNUC__
174 /* This apparently is for the system ld as opposed to Gnu ld. */
175 #ifdef OSF1
176 #define LD_SWITCH_MACHINE -non_shared
177 #endif /* OSF1 */
178 #endif /* not __GNUC__ */
179 #endif /* 0 */
180
181 #ifdef OSF1
182 #define LIBS_DEBUG
183 #define START_FILES pre-crt0.o
184 #endif /* OSF1 */
185
186 #ifdef LINUX
187 /* This controls a conditional in main. */
188 #define LINUX_SBRK_BUG
189 #endif /* LINUX */
190
191 /* The program to be used for unexec. */
192
193 #define UNEXEC unexalpha.o
194
195 #define PNTR_COMPARISON_TYPE unsigned long
196
197 #if 0
198
199 /* XEmacs -- removed code to define XINT, etc. This gets
200 correctly handled automatically. */
201
202 /* Declare malloc and realloc in a way that is clean.
203 But not in makefiles! */
204
205 #ifndef NOT_C_CODE
206 /* We need these because pointers are larger than the default ints. */
207 #include <alloca.h>
208 #endif /* not NOT_C_CODE */
209
210 #endif /* 0 */
211
212 #ifdef OSF1
213 #define PTY_ITERATION for (i = 0; i < 1; i++) /* ick */
214 #define PTY_NAME_SPRINTF /* none */
215 #define PTY_TTY_NAME_SPRINTF /* none */
216 #define PTY_OPEN \
217 do \
218 { \
219 int dummy; \
220 int mask = sigsetmask (SIGCHLD); \
221 if (-1 == openpty (&fd, &dummy, pty_name, 0, 0)) \
222 fd = -1; \
223 sigsetmask (mask); \
224 close (dummy); \
225 } \
226 while (0)
227 #endif /* OSF1 */
228
229 #ifdef linux
230 #define COFF
231 #define TEXT_END ({ extern int _etext; &_etext; })
232 #define DATA_END ({ extern int _EDATA; &_EDATA; })
233 #endif /* linux */
234
235 /* XEmacs: The Dec CC compiler (but apparently not GCC, which uses different
236 macros due to its own compiler bug) breaks spectacularly
237 when MACROIZE_ERROR_CHECKING is turned on. */
238 #define BROKEN_MACROIZE_ERROR_CHECKING
239
240 /* XEmacs: from Andrew Cohen based on this comment found in <termio.h>:
241
242 Unfortunately System V and POSIX have different values for some of
243 the defines. So we have to perform the following kluge which
244 redefines the V___ values for termio. This means you cannot do
245 ioctls using termios and termio in the same source file.
246 */
247 #define NO_TERMIO 1