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bf40a97f | 1 | /* m- file for Mips machines. |
d8f6d720 | 2 | Copyright (C) 1987, 1992, 1993, 1995, 2002 Free Software Foundation, Inc. |
abf60cc4 | 3 | |
bf40a97f RS |
4 | This file contains some changes for our SVR4 based SINIX-Mips 5.4. |
5 | I hope this is helpful to port the emacs to our RM?00 series and | |
6 | maybe to the DC/OSx (Mips-based) machines of Pyramid Inc. | |
7 | (Marco.Walther@mch.sni.de) | |
abf60cc4 | 8 | |
bf40a97f | 9 | This file is part of GNU Emacs. |
abf60cc4 | 10 | |
bf40a97f RS |
11 | GNU Emacs is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2, or (at your option) | |
14 | any later version. | |
abf60cc4 | 15 | |
bf40a97f RS |
16 | GNU Emacs is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
23 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
24 | Boston, MA 02111-1307, USA. */ | |
bf40a97f RS |
25 | |
26 | ||
177c0ea7 | 27 | /* The following line tells the configuration script what sort of |
bf40a97f RS |
28 | operating system this machine is likely to run. |
29 | USUAL-OPSYS="note" | |
30 | ||
31 | NOTE-START | |
32 | Use m-mips4.h for RISCOS version 4; use s-bsd4-3.h with the BSD world. | |
33 | Note that the proper m- file for the Decstation is m-pmax.h. | |
34 | This is the m- file for SNI RM*00 machines. Use s- sinix5-4.h file! | |
35 | With this the file mips-siemens.h is obsolete. | |
36 | NOTE-END */ | |
37 | ||
bf40a97f RS |
38 | /* Define BIG_ENDIAN iff lowest-numbered byte in a word |
39 | is the most significant byte. */ | |
40 | ||
41 | #define BIG_ENDIAN | |
42 | ||
43 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a | |
44 | * group of arguments and treat it as an array of the arguments. */ | |
308f428d | 45 | |
48083859 RS |
46 | #define NO_ARG_ARRAY |
47 | ||
bf40a97f RS |
48 | /* Define WORD_MACHINE if addresses and such have |
49 | * to be corrected before they can be used as byte counts. */ | |
50 | ||
51 | #undef WORD_MACHINE | |
52 | ||
53 | /* Define how to take a char and sign-extend into an int. | |
54 | On machines where char is signed, this is a no-op. */ | |
55 | ||
56 | #define SIGN_EXTEND_CHAR(c) ((signed char)(c)) | |
57 | ||
58 | /* Now define a symbol for the cpu type, if your compiler | |
59 | does not define it automatically: | |
60 | Ones defined so far include vax, m68000, ns16000, pyramid, | |
61 | orion, tahoe, APOLLO and many others */ | |
62 | #ifndef mips | |
63 | # define mips | |
64 | #endif | |
65 | ||
66 | /* Use type int rather than a union, to represent Lisp_Object */ | |
67 | /* This is desirable for most machines. */ | |
68 | ||
69 | #define NO_UNION_TYPE | |
70 | ||
71 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
72 | the 24-bit bit field into an int. In other words, if bit fields | |
73 | are always unsigned. | |
74 | ||
75 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
76 | ||
77 | #define EXPLICIT_SIGN_EXTEND | |
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 | #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0) | |
48083859 | 86 | |
bf40a97f RS |
87 | /* CDC EP/IX 1.4.3 uses /unix */ |
88 | ||
89 | #undef KERNEL_FILE | |
90 | #define KERNEL_FILE "/unix" | |
91 | ||
92 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
93 | Then the function dump-emacs will not be defined | |
94 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
95 | ||
96 | #undef CANNOT_DUMP | |
97 | ||
98 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
99 | pure and impure space as loaded can vary, and even their | |
100 | relative order cannot be relied on. | |
101 | ||
102 | Otherwise Emacs assumes that text space precedes data space, | |
103 | numerically. */ | |
104 | ||
105 | /* #define VIRT_ADDR_VARIES */ | |
106 | ||
bf40a97f RS |
107 | /* Define NO_REMAP if memory segmentation makes it not work well |
108 | to change the boundary between the text section and data section | |
109 | when Emacs is dumped. If you define this, the preloaded Lisp | |
110 | code will not be sharable; but that's better than failing completely. */ | |
111 | ||
112 | #define NO_REMAP | |
113 | ||
114 | /* Describe layout of the address space in an executing process. */ | |
115 | /* MARCO ??? | |
116 | */ | |
117 | #define TEXT_START 0x400000 | |
118 | /* | |
119 | #define DATA_START 0x10000000 | |
120 | #define DATA_SEG_BITS 0x10000000 | |
121 | */ | |
122 | #ifdef UNEXEC | |
123 | #undef UNEXEC | |
124 | #endif | |
f7c9fad1 | 125 | #define UNEXEC unexsni.o |
bf40a97f RS |
126 | |
127 | #undef ORDINARY_LINK | |
128 | ||
129 | #undef LIBS_DEBUG | |
130 | ||
131 | /* Alter some of the options used when linking. */ | |
132 | ||
133 | #define LIBS_MACHINE -lmld | |
134 | #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o | |
135 | ||
136 | #ifdef LIB_STANDARD | |
137 | #undef LIB_STANDARD | |
138 | #endif | |
139 | #define LIB_STANDARD -lc /usr/ccs/lib/crtn.o | |
140 | ||
141 | #ifdef __GNUC__ | |
142 | #define C_DEBUG_SWITCH | |
177c0ea7 | 143 | #define LD_SWITCH_MACHINE |
bf40a97f RS |
144 | #else |
145 | #define C_DEBUG_SWITCH -DSYSV | |
177c0ea7 | 146 | #define C_OPTIMIZE_SWITCH -DSYSV |
bf40a97f RS |
147 | #define LD_SWITCH_MACHINE |
148 | #endif | |
149 | ||
bf40a97f RS |
150 | \f |
151 | /* The standard definitions of these macros would work ok, | |
152 | but these are faster because the constants are short. */ | |
153 | ||
5964b664 | 154 | #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)) |
bf40a97f RS |
155 | |
156 | #define XSET(var, type, ptr) \ | |
157 | ((var) = \ | |
158 | ((int)(type) << VALBITS) \ | |
5964b664 | 159 | + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))) |
bf40a97f | 160 | |
bf40a97f RS |
161 | #define XUNMARK(a) \ |
162 | ((a) = \ | |
5964b664 KH |
163 | (((unsigned)(a) << (BITS_PER_INT-GCTYPEBITS-VALBITS)) \ |
164 | >> (BITS_PER_INT-GCTYPEBITS-VALBITS))) | |
ec2970a2 | 165 |