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1.1 root 1: /* m-alliant-2800.h Alliant FX/2800 machine running Concentrix 2800.
2: Copyright (C) 1990 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: #undef 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) (c)
50:
51: /* Now define a symbol for the cpu type, if your compiler
52: does not define it automatically:
53: vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
54: are the ones defined so far. */
55:
56: #define ALLIANT
57: #define ALLIANT_2800
58: #define sun /* Use X support for Sun keyboard stuff. */
59: #define C_OPTIMIZE_SWITCH -Og /* No concurrent code allowed here. */
60: #define VALBITS 26
61: #define GCTYPEBITS 5
62:
63: /* Use type int rather than a union, to represent Lisp_Object */
64: /* This is desirable for most machines. */
65:
66: #define NO_UNION_TYPE
67:
68: /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
69: the 24-bit bit field into an int. In other words, if bit fields
70: are always unsigned.
71:
72: If you use NO_UNION_TYPE, this flag does not matter. */
73: /* On Alliants, bitfields are unsigned. */
74:
75: #define EXPLICIT_SIGN_EXTEND
76:
77: /* Concentrix uses a different kernel symbol for load average. */
78:
79: #undef LDAV_SYMBOL /* Undo definition in s-bsd4-2.h */
80: #define LDAV_SYMBOL "_Loadavg"
81:
82: /* Data type of load average, as read out of kmem. */
83:
84: #define LOAD_AVE_TYPE long
85:
86: /* Convert that into an integer that is 100 for a load average of 1.0 */
87:
88: #define LOAD_AVE_CVT(x) (x * 100 / LOADAVG_SCALE)
89:
90: /* include <sys/param.h> for the definition of LOADAVG_SCALE, and also
91: LOADAVG_SIZE, the number of items in the Loadavg array. */
92:
93: /* Define CANNOT_DUMP on machines where unexec does not work.
94: Then the function dump-emacs will not be defined
95: and temacs will do (load "loadup") automatically unless told otherwise. */
96:
97: /* #define CANNOT_DUMP */
98: #define UNEXEC unexfx2800.o
99: #define LIBS_MACHINE -lalliant
100:
101: /* Define VIRT_ADDR_VARIES if the virtual addresses of
102: pure and impure space as loaded can vary, and even their
103: relative order cannot be relied on.
104:
105: Otherwise Emacs assumes that text space precedes data space,
106: numerically. */
107:
108: #undef VIRT_ADDR_VARIES
109:
110: /* Define C_ALLOCA if this machine does not support a true alloca
111: and the one written in C should be used instead.
112: Define HAVE_ALLOCA to say that the system provides a properly
113: working alloca function and it should be used.
114: Define neither one if an assembler-language alloca
115: in the file alloca.s should be used. */
116:
117: #undef C_ALLOCA
118: #define HAVE_ALLOCA
119:
120: /* Define NO_REMAP if memory segmentation makes it not work well
121: to change the boundary between the text section and data section
122: when Emacs is dumped. If you define this, the preloaded Lisp
123: code will not be sharable; but that's better than failing completely. */
124: /* Actually, Alliant CONCENTRIX does paging "right":
125: data pages are copy-on-write, which means that the pure data areas
126: are shared automatically and remapping is not necessary. */
127:
128: #define NO_REMAP
129:
130: /* Alliant needs special crt0.o because system version is not reentrant */
131:
132: #define START_FILES crt0.o
133:
134: /* Alliant dependent code for dumping executing image.
135: See crt0.c code for alliant. */
136:
137: #define ADJUST_EXEC_HEADER {\
138: extern int _curbrk, _setbrk;\
139: _setbrk = _curbrk;\
140: hdr.a_bss_addr = bss_start;\
141: unexec_text_start = hdr.a_text_addr;}
142:
143: /* POSIX Compatibility */
144: /* Use System V.4 style getdents/readdir <dirent.h> for 2.2 and up. */
145: #define SYSV_SYSTEM_DIR
146: #define HAVE_CLOSEDIR
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