1 /* m- file for Mips machines.
2 Copyright (C) 1987,1992,1993,95,2002,03 Free Software Foundation, Inc.
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)
9 This file is part of GNU Emacs.
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)
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.
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
23 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
27 /* The following line tells the configuration script what sort of
28 operating system this machine is likely to run.
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35 With this the file mips-siemens.h is obsolete.
38 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
39 is the most significant byte. */
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. */
48 /* Define WORD_MACHINE if addresses and such have
49 * to be corrected before they can be used as byte counts. */
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. */
56 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
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 */
66 /* Use type int rather than a union, to represent Lisp_Object */
67 /* This is desirable for most machines. */
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
75 If you use NO_UNION_TYPE, this flag does not matter. */
77 #define EXPLICIT_SIGN_EXTEND
79 /* Data type of load average, as read out of kmem. */
81 #define LOAD_AVE_TYPE long
83 /* Convert that into an integer that is 100 for a load average of 1.0 */
85 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
87 /* CDC EP/IX 1.4.3 uses /unix */
90 #define KERNEL_FILE "/unix"
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. */
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.
102 Otherwise Emacs assumes that text space precedes data space,
105 /* #define VIRT_ADDR_VARIES */
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. */
114 /* Describe layout of the address space in an executing process. */
117 #define TEXT_START 0x400000
119 #define DATA_START 0x10000000
120 #define DATA_SEG_BITS 0x10000000
125 #define UNEXEC unexsni.o
131 /* Alter some of the options used when linking. */
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
139 #define LIB_STANDARD -lc /usr/ccs/lib/crtn.o
142 #define C_DEBUG_SWITCH
143 #define LD_SWITCH_MACHINE
145 #define C_DEBUG_SWITCH -DSYSV
146 #define C_OPTIMIZE_SWITCH -DSYSV
147 #define LD_SWITCH_MACHINE
151 /* The standard definitions of these macros would work ok,
152 but these are faster because the constants are short. */
154 #define XUINT(a) (((unsigned)(a) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS))
156 #define XSET(var, type, ptr) \
158 ((int)(type) << VALBITS) \
159 + (((unsigned) (ptr) << (BITS_PER_INT-VALBITS)) >> (BITS_PER_INT-VALBITS)))
161 /* arch-tag: a4f5c090-0bd5-48f0-9724-b7d531f9b6c8
162 (do not change this comment) */