1/* alliant-2800.h - Alliant FX/2800 machine running Concentrix 2800.
2   Copyright (C) 1990, 2001, 2002, 2003, 2004, 2005,
3                 2006, 2007  Free Software Foundation, Inc.
4
5This file is part of GNU Emacs.
6
7GNU Emacs is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU Emacs is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU Emacs; see the file COPYING.  If not, write to
19the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22
23/* The following line tells the configuration script what sort of
24   operating system this machine is likely to run.
25   USUAL-OPSYS="bsd4-3"  */
26
27/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
28   is the most significant byte.  */
29
30#undef WORDS_BIG_ENDIAN
31
32/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
33 * group of arguments and treat it as an array of the arguments.  */
34
35#define NO_ARG_ARRAY
36
37/* Define WORD_MACHINE if addresses and such have
38 * to be corrected before they can be used as byte counts.  */
39
40#undef WORD_MACHINE
41
42/* Now define a symbol for the cpu type, if your compiler
43   does not define it automatically:
44   vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
45   are the ones defined so far.  */
46
47#define ALLIANT
48#define ALLIANT_2800
49#define sun			/* Use X support for Sun keyboard stuff. */
50#define C_OPTIMIZE_SWITCH -Og	/* No concurrent code allowed here. */
51
52/* Use type int rather than a union, to represent Lisp_Object */
53/* This is desirable for most machines.  */
54
55#define NO_UNION_TYPE
56
57/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
58   the bit field into an int.  In other words, if bit fields
59   are always unsigned.
60
61   If you use NO_UNION_TYPE, this flag does not matter.  */
62/* On Alliants, bitfields are unsigned. */
63
64#define EXPLICIT_SIGN_EXTEND
65
66/* Concentrix uses a different kernel symbol for load average. */
67
68#undef  LDAV_SYMBOL		/* Undo definition in s-bsd4-2.h */
69#define LDAV_SYMBOL "_Loadavg"
70
71/* Data type of load average, as read out of kmem.  */
72
73#define LOAD_AVE_TYPE long
74
75/* Convert that into an integer that is 100 for a load average of 1.0  */
76
77#define LOAD_AVE_CVT(x) (x * 100 / LOADAVG_SCALE)
78
79/* include <sys/param.h> for the definition of LOADAVG_SCALE, and also
80   LOADAVG_SIZE, the number of items in the Loadavg array. */
81
82/* Define CANNOT_DUMP on machines where unexec does not work.
83   Then the function dump-emacs will not be defined
84   and temacs will do (load "loadup") automatically unless told otherwise.  */
85
86/* #define CANNOT_DUMP */
87#define UNEXEC unexfx2800.o
88#define LIBS_MACHINE -lalliant
89
90/* Define VIRT_ADDR_VARIES if the virtual addresses of
91   pure and impure space as loaded can vary, and even their
92   relative order cannot be relied on.
93
94   Otherwise Emacs assumes that text space precedes data space,
95   numerically.  */
96
97#undef VIRT_ADDR_VARIES
98
99/* Define NO_REMAP if memory segmentation makes it not work well
100   to change the boundary between the text section and data section
101   when Emacs is dumped.  If you define this, the preloaded Lisp
102   code will not be sharable; but that's better than failing completely.  */
103/* Actually, Alliant CONCENTRIX does paging "right":
104   data pages are copy-on-write, which means that the pure data areas
105   are shared automatically and remapping is not necessary.  */
106
107#define NO_REMAP
108
109/* Alliant needs special crt0.o because system version is not reentrant */
110
111#define START_FILES crt0.o
112
113/* Alliant dependent code for dumping executing image.
114   See crt0.c code for alliant.  */
115
116#define ADJUST_EXEC_HEADER {\
117extern int _curbrk, _setbrk;\
118_setbrk = _curbrk;\
119hdr.a_bss_addr = bss_start;\
120unexec_text_start = hdr.a_text_addr;}
121
122/* POSIX Compatibility */
123/* Use System V.4 style getdents/readdir <dirent.h> for 2.2 and up. */
124#define SYSV_SYSTEM_DIR
125
126/* Use the K&R version of the DEFUN macro.  */
127#define USE_NONANSI_DEFUN
128
129/* arch-tag: 8ba70b15-d082-40f6-931d-14adfd7f9dbd
130   (do not change this comment) */
131