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f3cc1007 | 1 | /* Machine description file for Acorn RISCiX machines. |
d8f6d720 | 2 | Copyright (C) 1994, 2002 Free Software Foundation, Inc. |
f3cc1007 RS |
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 2, 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 GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
f3cc1007 RS |
20 | |
21 | ||
22 | ||
74d3f806 | 23 | /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word |
f3cc1007 RS |
24 | is the most significant byte. */ |
25 | ||
74d3f806 | 26 | #undef WORDS_BIG_ENDIAN |
f3cc1007 RS |
27 | |
28 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a | |
29 | * group of arguments and treat it as an array of the arguments. We can't | |
30 | * do this on the arm with gcc, since the first 4 args are in registers. */ | |
31 | ||
32 | #ifdef __GNUC__ | |
33 | #define NO_ARG_ARRAY | |
34 | #else | |
35 | #undef NO_ARG_ARRAY | |
36 | #endif | |
37 | ||
38 | /* Define WORD_MACHINE if addresses and such have | |
39 | * to be corrected before they can be used as byte counts. */ | |
40 | ||
41 | #undef WORD_MACHINE | |
42 | ||
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 | /* ARM note - The RISCiX Norcroft C Compiler has ALL | |
47 | non-32-bit types as unsigned */ | |
48 | ||
49 | #define SIGN_EXTEND_CHAR(c) (((int)(c) << 24) >> 24) | |
50 | ||
51 | /* Now define a symbol for the cpu type, if your compiler | |
52 | does not define it automatically: | |
53 | Ones defined so far include vax, m68000, ns16000, pyramid, | |
54 | orion, tahoe, APOLLO and many others */ | |
55 | ||
56 | /* ARM note - this is done by the Norcroft compiler - symbol is `__arm' */ | |
57 | ||
58 | /* Use type int rather than a union, to represent Lisp_Object */ | |
59 | /* This is desirable for most machines. */ | |
60 | ||
61 | #define NO_UNION_TYPE | |
62 | ||
63 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
64 | the 24-bit bit field into an int. In other words, if bit fields | |
65 | are always unsigned. | |
66 | ||
67 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
68 | ||
69 | #define EXPLICIT_SIGN_EXTEND | |
70 | ||
71 | #ifdef LDAV_SYMBOL | |
72 | #undef LDAV_SYMBOL | |
73 | #endif | |
74 | ||
75 | #define LDAV_SYMBOL "_iavenrun" | |
76 | ||
77 | ||
78 | /* Data type of load average, as read out of kmem. */ | |
79 | ||
80 | #define LOAD_AVE_TYPE long | |
81 | ||
82 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
83 | ||
84 | /* | |
85 | * Scale factor for scaled integers used to count | |
86 | * %cpu time and load averages. | |
87 | */ | |
88 | ||
89 | /* FSHIFT and FSCALE are defined in param.h, but are required by | |
90 | LOAD_AVE_CVT, so they need to be defined here. */ | |
91 | ||
92 | #ifndef FSHIFT | |
93 | #define FSHIFT 8 /* bits to right of fixed binary point */ | |
94 | #endif | |
95 | ||
96 | #ifndef FSCALE | |
97 | #define FSCALE (1<<FSHIFT) | |
98 | #endif | |
99 | ||
100 | #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) | |
101 | ||
102 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
103 | Then the function dump-emacs will not be defined | |
104 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
105 | ||
106 | #undef CANNOT_DUMP | |
107 | ||
108 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
109 | pure and impure space as loaded can vary, and even their | |
110 | relative order cannot be relied on. | |
111 | ||
112 | Otherwise Emacs assumes that text space precedes data space, | |
113 | numerically. */ | |
114 | ||
115 | #undef VIRT_ADDR_VARIES | |
116 | ||
117 | /* This prevents Emacs dumping an unsqueezed binary with the | |
118 | SQUEEZE bit set in the magic number. */ | |
119 | ||
120 | #define ADJUST_EXEC_HEADER {hdr.a_magic &= ~MF_SQUEEZED;} | |
121 | ||
f3cc1007 RS |
122 | #ifdef __GNUC__ |
123 | ||
f3cc1007 RS |
124 | /* Keep gcc/RISCiX happy - it uses __gccmain where other versions of |
125 | gcc use __main, because of a library routine name clash. */ | |
126 | #define __main __gccmain | |
127 | ||
f3cc1007 RS |
128 | #endif /* __GNUC__ */ |
129 | ||
130 | /* Define NO_REMAP if memory segmentation makes it not work well | |
131 | to change the boundary between the text section and data section | |
132 | when Emacs is dumped. If you define this, the preloaded Lisp | |
133 | code will not be sharable; but that's better than failing completely. */ | |
134 | ||
135 | #define NO_REMAP | |
136 | ||
137 | ||
138 | #ifndef NOT_C_CODE | |
139 | #define TEXT_START 0x8000 | |
140 | #define DATA_END &_edata | |
141 | extern int _edata; | |
142 | #define etext _etext | |
143 | #endif | |
144 | ||
145 | /* Avoid debugging library */ | |
146 | #define LIBS_DEBUG | |
147 | ||
148 | /* Avoid sharing libc */ | |
149 | #define LIB_STANDARD -lc_n | |
150 | ||
151 | /* Avoid sharing libX11 */ | |
152 | #define LIB_X11_LIB -lX11_n | |
153 | ||
154 | /* All kinds of symbol definitions, so as to avoid multiply defined symbol | |
155 | errors from the RISCiX linker. */ | |
156 | ||
157 | #ifdef __GNUC__ | |
158 | #define C_DEBUG_SWITCH | |
159 | ||
160 | #define C_OPTIMIZE_SWITCH -O1 -fomit-frame-pointer -w -g -Dgetopt=gnu_getopt -Dopterr=gnu_opterr -Doptind=gnu_optind -Doptarg=gnu_optarg -Dcfree=gnu_cfree -D___type= | |
161 | ||
162 | #else | |
163 | #define C_DEBUG_SWITCH -O -w -g -Dgetopt=gnu_getopt -Dopterr=gnu_opterr -Doptind=gnu_optind -Doptarg=gnu_optarg -Dcfree=gnu_cfree | |
164 | #endif | |
165 | ||
166 | /* Turn this on to avoid the emacs malloc and use standard one */ | |
167 | ||
168 | #undef SYSTEM_MALLOC | |
169 | ||
170 | /* Use <dirent.h>. */ | |
171 | #define SYSV_SYSTEM_DIR | |
172 | ||
f3cc1007 RS |
173 | #ifdef NO_REMAP |
174 | /* CRT0_O is defined in s/riscix1-1.h or s/riscix1-2.h, as appropriate. */ | |
175 | #define START_FILES pre-crt0.o CRT0_O | |
176 | #else | |
177 | Cannot | |
178 | do | |
179 | this | |
180 | yet | |
181 | #endif | |
ab5796a9 MB |
182 | |
183 | /* arch-tag: acee2955-8c49-4b40-813c-579f76f4c0c3 | |
184 | (do not change this comment) */ |