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1.1 root 1: /* m- file for Mips machines.
2: Copyright (C) 1987 Free Software Foundation, Inc.
3:
4: This file is part of GNU Emacs.
5:
6: GNU Emacs is distributed in the hope that it will be useful,
7: but WITHOUT ANY WARRANTY. No author or distributor
8: accepts responsibility to anyone for the consequences of using it
9: or for whether it serves any particular purpose or works at all,
10: unless he says so in writing. Refer to the GNU Emacs General Public
11: License for full details.
12:
13: Everyone is granted permission to copy, modify and redistribute
14: GNU Emacs, but only under the conditions described in the
15: GNU Emacs General Public License. A copy of this license is
16: supposed to have been given to you along with GNU Emacs so you
17: can know your rights and responsibilities. It should be in a
18: file named COPYING. Among other things, the copyright notice
19: and this notice must be preserved on all copies. */
20:
21:
22: /* The following three symbols give information on
23: the size of various data types. */
24:
25: #define SHORTBITS 16 /* Number of bits in a short */
26:
27: #define INTBITS 32 /* Number of bits in an int */
28:
29: #define LONGBITS 32 /* Number of bits in a long */
30:
31: /* Define BIG_ENDIAN iff lowest-numbered byte in a word
32: is the most significant byte. */
33:
34: #define BIG_ENDIAN
35:
36: /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
37: * group of arguments and treat it as an array of the arguments. */
38:
39: #define NO_ARG_ARRAY
40:
41: /* Define WORD_MACHINE if addresses and such have
42: * to be corrected before they can be used as byte counts. */
43:
44: #undef WORD_MACHINE
45:
46: /* Define how to take a char and sign-extend into an int.
47: On machines where char is signed, this is a no-op. */
48:
49: #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
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: #ifndef mips
56: # define mips
57: #endif
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: /* Data type of load average, as read out of kmem. */
73:
74: #define LOAD_AVE_TYPE long
75:
76: /* Convert that into an integer that is 100 for a load average of 1.0 */
77:
78: #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
79:
80: /* Define CANNOT_DUMP on machines where unexec does not work.
81: Then the function dump-emacs will not be defined
82: and temacs will do (load "loadup") automatically unless told otherwise. */
83:
84: #undef CANNOT_DUMP
85:
86: /* Define VIRT_ADDR_VARIES if the virtual addresses of
87: pure and impure space as loaded can vary, and even their
88: relative order cannot be relied on.
89:
90: Otherwise Emacs assumes that text space precedes data space,
91: numerically. */
92:
93: /* #define VIRT_ADDR_VARIES */
94:
95: /* Define C_ALLOCA if this machine does not support a true alloca
96: and the one written in C should be used instead.
97: Define HAVE_ALLOCA to say that the system provides a properly
98: working alloca function and it should be used.
99: Define neither one if an assembler-language alloca
100: in the file alloca.s should be used. */
101:
102: #define C_ALLOCA
103: /* #define HAVE_ALLOCA */
104:
105: /* Define NO_REMAP if memory segmentation makes it not work well
106: to change the boundary between the text section and data section
107: when Emacs is dumped. If you define this, the preloaded Lisp
108: code will not be sharable; but that's better than failing completely. */
109:
110: #define NO_REMAP
111:
112: /* This machine requires completely different unexec code
113: which lives in a separate file. Specify the file name. */
114:
115: #define UNEXEC unexmips.o
116:
117: /* Describe layout of the address space in an executing process. */
118:
119: #define TEXT_START 0x400000
120: #define DATA_START 0x800000
121:
122: /* Alter some of the options used when linking. */
123:
124: #ifdef BSD
125:
126: /* Supposedly the dec machine doesn't have this library.
127: #define LIBS_MACHINE -lmld */
128:
129: #define LD_SWITCH_MACHINE -D 800000
130: #define LIBS_DEBUG
131:
132: #else
133:
134: #define LIBS_MACHINE -lmld
135: #define LD_SWITCH_MACHINE -D 800000 -g3
136: #define START_FILES pre-crt0.o /usr/lib/crt1.o
137: #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
138: #define LIBS_TERMCAP -lcurses
139:
140: #define C_SWITCH_SYSTEM -I/usr/include/bsd
141: #define C_DEBUG_SWITCH -O -g3
142:
143: #if defined(HAVE_X_WINDOWS) && defined(HAVE_X11)
144: #define HAVE_VFORK /* Graciously provided by libX.a */
145: #endif
146:
147: #endif
148:
149: /* The standard definitions of these macros would work ok,
150: but these are faster because the constants are short. */
151:
152: #define XUINT(a) (((unsigned)(a) << INTBITS-VALBITS) >> INTBITS-VALBITS)
153:
154: #define XSET(var, type, ptr) \
155: ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << INTBITS-VALBITS) >> INTBITS-VALBITS))
156:
157: #define XSETINT(a, b) XSET(a, XTYPE(a), b)
158: #define XSETUINT(a, b) XSET(a, XTYPE(a), b)
159: #define XSETPNTR(a, b) XSET(a, XTYPE(a), b)
160:
161: #define XUNMARK(a) ((a) = (((unsigned)(a) << INTBITS-GCTYPEBITS-VALBITS) >> INTBITS-GCTYPEBITS-VALBITS))
162:
163: #ifdef USG
164:
165: /* Cancel certain parts of standard sysV.3 support. */
166: #undef SYSV_SYSTEM_DIR
167: #undef static
168:
169: /* Don't try to use SIGIO or FIONREAD even though they are defined. */
170: #undef SIGIO
171: #define BROKEN_FIONREAD
172:
173: /* Describe special kernel features. */
174:
175: #define HAVE_SYSVIPC
176:
177: #define HAVE_TIMEVAL
178: #if defined(emacs)
179: #include <bsd/sys/time.h>
180: #endif
181:
182: /* #define HAVE_SELECT
183: The `select' in the system won't work for pipes,
184: so don't use it. */
185:
186: #define HAVE_DUP2
187: #define HAVE_GETWD
188: #define HAVE_GETTIMEOFDAY
189:
190: #define HAVE_PTYS
191: #define HAVE_SOCKETS
192: #define BSTRING
193:
194: /* ??? */
195: #define IRIS
196:
197: #endif
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