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f3cc1007 | 1 | /* Machine description file for Acorn RISCiX machines. |
429ab54e GM |
2 | Copyright (C) 1994, 2001, 2002, 2003, 2004, 2005, |
3 | 2006, 2007 Free Software Foundation, Inc. | |
f3cc1007 RS |
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 | |
4a9f99bd | 9 | the Free Software Foundation; either version 3, or (at your option) |
f3cc1007 RS |
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 | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
f3cc1007 RS |
21 | |
22 | ||
23 | ||
74d3f806 | 24 | /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word |
f3cc1007 RS |
25 | is the most significant byte. */ |
26 | ||
74d3f806 | 27 | #undef WORDS_BIG_ENDIAN |
f3cc1007 RS |
28 | |
29 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a | |
30 | * group of arguments and treat it as an array of the arguments. We can't | |
31 | * do this on the arm with gcc, since the first 4 args are in registers. */ | |
32 | ||
33 | #ifdef __GNUC__ | |
34 | #define NO_ARG_ARRAY | |
35 | #else | |
36 | #undef NO_ARG_ARRAY | |
37 | #endif | |
38 | ||
39 | /* Define WORD_MACHINE if addresses and such have | |
40 | * to be corrected before they can be used as byte counts. */ | |
41 | ||
42 | #undef WORD_MACHINE | |
43 | ||
44 | /* Define how to take a char and sign-extend into an int. | |
45 | On machines where char is signed, this is a no-op. */ | |
46 | ||
47 | /* ARM note - The RISCiX Norcroft C Compiler has ALL | |
48 | non-32-bit types as unsigned */ | |
49 | ||
50 | #define SIGN_EXTEND_CHAR(c) (((int)(c) << 24) >> 24) | |
51 | ||
52 | /* Now define a symbol for the cpu type, if your compiler | |
53 | does not define it automatically: | |
54 | Ones defined so far include vax, m68000, ns16000, pyramid, | |
55 | orion, tahoe, APOLLO and many others */ | |
56 | ||
57 | /* ARM note - this is done by the Norcroft compiler - symbol is `__arm' */ | |
58 | ||
59 | /* Use type int rather than a union, to represent Lisp_Object */ | |
60 | /* This is desirable for most machines. */ | |
61 | ||
62 | #define NO_UNION_TYPE | |
63 | ||
64 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
65 | the 24-bit bit field into an int. In other words, if bit fields | |
66 | are always unsigned. | |
67 | ||
68 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
69 | ||
70 | #define EXPLICIT_SIGN_EXTEND | |
71 | ||
72 | #ifdef LDAV_SYMBOL | |
73 | #undef LDAV_SYMBOL | |
74 | #endif | |
75 | ||
76 | #define LDAV_SYMBOL "_iavenrun" | |
77 | ||
78 | ||
79 | /* Data type of load average, as read out of kmem. */ | |
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 | /* | |
86 | * Scale factor for scaled integers used to count | |
87 | * %cpu time and load averages. | |
88 | */ | |
89 | ||
90 | /* FSHIFT and FSCALE are defined in param.h, but are required by | |
91 | LOAD_AVE_CVT, so they need to be defined here. */ | |
92 | ||
93 | #ifndef FSHIFT | |
94 | #define FSHIFT 8 /* bits to right of fixed binary point */ | |
95 | #endif | |
96 | ||
97 | #ifndef FSCALE | |
98 | #define FSCALE (1<<FSHIFT) | |
99 | #endif | |
100 | ||
101 | #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) | |
102 | ||
103 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
104 | Then the function dump-emacs will not be defined | |
105 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
106 | ||
107 | #undef CANNOT_DUMP | |
108 | ||
109 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
110 | pure and impure space as loaded can vary, and even their | |
111 | relative order cannot be relied on. | |
112 | ||
113 | Otherwise Emacs assumes that text space precedes data space, | |
114 | numerically. */ | |
115 | ||
116 | #undef VIRT_ADDR_VARIES | |
117 | ||
118 | /* This prevents Emacs dumping an unsqueezed binary with the | |
119 | SQUEEZE bit set in the magic number. */ | |
120 | ||
121 | #define ADJUST_EXEC_HEADER {hdr.a_magic &= ~MF_SQUEEZED;} | |
122 | ||
f3cc1007 RS |
123 | #ifdef __GNUC__ |
124 | ||
f3cc1007 RS |
125 | /* Keep gcc/RISCiX happy - it uses __gccmain where other versions of |
126 | gcc use __main, because of a library routine name clash. */ | |
127 | #define __main __gccmain | |
128 | ||
f3cc1007 RS |
129 | #endif /* __GNUC__ */ |
130 | ||
131 | /* Define NO_REMAP if memory segmentation makes it not work well | |
132 | to change the boundary between the text section and data section | |
133 | when Emacs is dumped. If you define this, the preloaded Lisp | |
134 | code will not be sharable; but that's better than failing completely. */ | |
135 | ||
136 | #define NO_REMAP | |
137 | ||
138 | ||
139 | #ifndef NOT_C_CODE | |
140 | #define TEXT_START 0x8000 | |
141 | #define DATA_END &_edata | |
142 | extern int _edata; | |
143 | #define etext _etext | |
144 | #endif | |
145 | ||
146 | /* Avoid debugging library */ | |
147 | #define LIBS_DEBUG | |
148 | ||
149 | /* Avoid sharing libc */ | |
150 | #define LIB_STANDARD -lc_n | |
151 | ||
152 | /* Avoid sharing libX11 */ | |
153 | #define LIB_X11_LIB -lX11_n | |
154 | ||
155 | /* All kinds of symbol definitions, so as to avoid multiply defined symbol | |
156 | errors from the RISCiX linker. */ | |
157 | ||
158 | #ifdef __GNUC__ | |
159 | #define C_DEBUG_SWITCH | |
160 | ||
161 | #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= | |
162 | ||
163 | #else | |
164 | #define C_DEBUG_SWITCH -O -w -g -Dgetopt=gnu_getopt -Dopterr=gnu_opterr -Doptind=gnu_optind -Doptarg=gnu_optarg -Dcfree=gnu_cfree | |
165 | #endif | |
166 | ||
167 | /* Turn this on to avoid the emacs malloc and use standard one */ | |
168 | ||
169 | #undef SYSTEM_MALLOC | |
170 | ||
171 | /* Use <dirent.h>. */ | |
172 | #define SYSV_SYSTEM_DIR | |
173 | ||
f3cc1007 RS |
174 | #ifdef NO_REMAP |
175 | /* CRT0_O is defined in s/riscix1-1.h or s/riscix1-2.h, as appropriate. */ | |
176 | #define START_FILES pre-crt0.o CRT0_O | |
177 | #else | |
178 | Cannot | |
179 | do | |
180 | this | |
181 | yet | |
182 | #endif | |
ab5796a9 MB |
183 | |
184 | /* arch-tag: acee2955-8c49-4b40-813c-579f76f4c0c3 | |
185 | (do not change this comment) */ |