/[gxemul]/trunk/RELEASE
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Revision 28 - (show annotations)
Mon Oct 8 16:20:26 2007 UTC (13 years, 2 months ago) by dpavlin
File size: 6982 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1298 2006/07/22 11:27:46 debug Exp $
20060626	Continuing on SPARC emulation (beginning on the 'save'
		instruction, register windows, etc).
20060629	Planning statistics gathering (new -s command line option),
		and renaming speed_tricks to allow_instruction_combinations.
20060630	Some minor manual page updates.
		Various cleanups.
		Implementing the -s command line option.
20060701	FINALLY found the bug which prevented Linux and Ultrix from
		running without the ugly hack in the R2000/R3000 cache isol
		code; it was the phystranslation hint array which was buggy.
		Removing the phystranslation hint code completely, for now.
20060702	Minor dyntrans cleanups; invalidation of physpages now only
		invalidate those parts of a page that have actually been
		translated. (32 parts per page.)
		Some MIPS non-R3000 speed fixes.
		Experimenting with MIPS instruction combination for some
		addiu+bne+sw loops, and sw+sw+sw.
		Adding support (again) for larger-than-4KB pages in MIPS tlbw*.
		Continuing on SPARC emulation: adding load/store instructions.
20060704	Fixing a virtual vs physical page shift bug in the new tlbw*
		implementation. Problem noticed by Jakub Jermar. (Many thanks.)
		Moving rfe and eret to cpu_mips_instr.c, since that is the
		only place that uses them nowadays.
20060705	Removing the BSD license from the "testmachine" include files,
		placing them in the public domain instead; this enables the
		testmachine stuff to be used from projects which are
		incompatible with the BSD license for some reason.
20060707	Adding instruction combinations for the R2000/R3000 L1
		I-cache invalidation code used by NetBSD/pmax 3.0, lui+addiu,
		various branches followed by addiu or nop, and jr ra followed
		by addiu. The time it takes to perform a full NetBSD/pmax R3000
		install on the laptop has dropped from 573 seconds to 539. :-)
20060708	Adding a framebuffer controller device (dev_fbctrl), which so
		far can be used to change the fb resolution during runtime, but
		in the future will also be useful for accelerated block fill/
		copy, and possibly also simplified character output.
		Adding an instruction combination for NetBSD/pmax' strlen.
20060709	Minor fixes: reading raw files in src/file.c wasn't memblock
		aligned, removing buggy multi_sw MIPS instruction combination,
		etc.
20060711	Adding a machine_qemu.c, which contains a "qemu_mips" machine.
		(It mimics QEMU's MIPS machine mode, so that a test kernel
		made for QEMU_MIPS also can run in GXemul... at least to some
		extent.)  Adding a short section about how to run this mode to
		doc/guestoses.html.
20060714	Misc. minor code cleanups.
20060715	Applying a patch which adds getchar() to promemul/yamon.c
		(from Oleksandr Tymoshenko).
		Adding yamon.h from NetBSD, and rewriting yamon.c to use it
		(instead of ugly hardcoded numbers) + some cleanup.
20060716	Found and fixed the bug which broke single-stepping of 64-bit
		programs between 0.4.0 and 0.4.0.1 (caused by too quick
		refactoring and no testing). Hopefully this fix will not
		break too many other things.
20060718	Continuing on the 8253 PIT; it now works with Linux/QEMU_MIPS.
		Re-adding the sw+sw+sw instr comb (the problem was that I had
		ignored endian issues); however, it doesn't seem to give any
		big performance gain.
20060720	Adding a dummy Transputer mode (T414, T800 etc) skeleton (only
		the 'j' and 'ldc' instructions are implemented so far). :-}
20060721	Adding gtreg.h from NetBSD, updating dev_gt.c to use it, plus
		misc. other updates to get Linux 2.6 for evbmips/malta working
		(thanks to Alec Voropay for the details).
		FINALLY found and fixed the bug which made tlbw* for non-R3000
		buggy; it was a reference count problem in the dyntrans core.
20060722	Testing stuff; things seem stable enough for a new release.

==============  RELEASE 0.4.1  ==============


1 Release notes for Gavare's eXperimental Emulator (GXemul), 0.4.1
2 ================================================================
3
4 Copyright (C) 2003-2006 Anders Gavare.
5
6
7 GXemul is an experimental instruction-level machine emulator. Several
8 emulation modes are available. In some modes, processors and surrounding
9 hardware components are emulated well enough to let unmodified operating
10 systems (e.g. NetBSD) run as if they were running on a real machine.
11
12 The documentation lists the machines and guest operating systems that can
13 be regarded as "working" in GXemul. The best working guest operating
14 systems are probably NetBSD/pmax, NetBSD/cats, and OpenBSD/cats.
15
16
17 Changes between release 0.4.0.1 and 0.4.1 include, among other things:
18
19 o) Some bugs in the dynamic translation core have been fixed, making
20 all emulation modes (especially the MIPS mode) more stable.
21
22 o) In the refactoring effort between 0.4.0 and 0.4.0.1, single-stepping
23 (and instruction tracing) of 64-bit programs was accidentally broken.
24 Single-stepping in 64-bit mode could result in strange exceptions.
25 This has been fixed in 0.4.1.
26
27 o) MIPS emulation performance has been improved somewhat:
28
29 R3000: After removing some buggy code (hints for physical page
30 translations), it was possible to remove the workaround for R3000
31 caches which was needed in 0.4.0.1 to make Linux and Ultrix run.
32 This gives an overall speedup for R2000/R3000.
33
34 For non-R3000, there have been some speedups as well. After fixing
35 reference count bugs for 64-bit addressing in the dyntrans system,
36 workarounds/hacks in the tlbwr/tlbwi instructions and in the ASID
37 change helper function could be removed.
38
39 o) A new -s command line option is now available, for dumping
40 raw runtime data/statistics on every instruction to a file.
41
42 Currently, the following kinds of data can be dumped:
43
44 1. the program counter (virtual address)
45 2. the physical address representation of the program counter
46 3. the internal dyntrans instruction call pointer, useful when
47 developing/optimizing the emulator
48
49 This data can then be analyzed by external tools.
50
51 (There was a -s command line option in previous releases of
52 the emulator, but it did not work as intended, and was not
53 usable from dyntrans emulation modes.)
54
55 Please read the HISTORY files for more details.
56
57
58 Files included in this release are:
59
60 HISTORY Detailed revision history / changelog.
61 LICENSE Copyright message / license.
62 README Quick start instructions, for the impatient.
63 RELEASE This file.
64 TODO TODO notes.
65 configure, Makefile.skel sh and make scripts for building GXemul.
66 demos Tutorial-like demos of testmachine functionality.
67 doc Documentation.
68 experiments Experimental code. (Usually not needed.)
69 src Source code.
70
71 To build the emulator, run the configure script, and then run make. This
72 should work on most Unix-like systems.
73
74
75 Regarding files in the src/include/ directory: only some of these are written
76 by me, the rest are from other sources (such as NetBSD). The license text says
77 that "All advertising materials mentioning features or use of this software"
78 must display acknowledgements. Even though I do NOT feel I mention features or
79 use of the header files (the "software") in any advertising materials, I am
80 still very grateful for the fact that these people have made their files
81 available for re-use, so regardless of legal requirements, I guess thanking
82 them like this is in order:
83
84 This product includes software developed by the University of
85 California, Berkeley and its contributors.
86
87 This product includes software developed for the
88 NetBSD Project. See http://www.netbsd.org/ for
89 information about NetBSD.
90
91 This product includes software developed by Jonathan Stone for
92 the NetBSD Project.
93
94 This product includes software developed for the NetBSD Project
95 by Matthias Drochner.
96
97 This product includes software developed by the NetBSD
98 Foundation, Inc. and its contributors.
99
100 This product includes software developed by Christopher G. Demetriou.
101 [for the NetBSD Project.]
102
103 This product includes software developed by Adam Glass.
104
105 This product includes software developed by the PocketBSD project
106 and its contributors.
107
108 This product includes software developed by Peter Galbavy.
109
110 Carnegie Mellon University (multiple header files,
111 no specific advertisement text required)
112
113 This product includes software developed by Charles M. Hannum.
114
115 This product includes software developed under OpenBSD by Per Fogelström.
116
117 This product includes software developed by Per Fogelström.
118
119 This product includes software developed at Ludd, University of
120 Luleå, Sweden and its contributors.
121
122 This product includes software developed by Hellmuth Michaelis
123 and Joerg Wunsch
124
125 The font(s) in devices/fonts are Copyright (c) 1992, 1993, 1994
126 by Hellmuth Michaelis and Joerg Wunsch. ("This product includes software
127 developed by Hellmuth Michaelis and Joerg Wunsch", well, the font
128 is maybe not software, but still...)
129
130 impactsr-bsd.h is Copyright (C) 2004 by Stanislaw Skowronek.
131
132 This product includes software developed for the NetBSD Project by
133 Wasabi Systems, Inc. [by Simon Burge]
134
135 arcbios_other.h is Copyright (c) 1996 M. Warner Losh.
136
137 This product includes software developed by Marc Horowitz.
138
139 This product includes software developed by Brini.
140
141 This product includes software developed by Mark Brinicombe
142 for the NetBSD Project.
143
144 This product includes software developed by TooLs GmbH.
145
146 This product includes software developed by Manuel Bouyer.
147
148 This product includes software developed by the Alice Group.
149
150 This product includes software developed by Ichiro FUKUHARA.
151
152 Also, src/include/alpha_rpb.h requires the following:
153
154 Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
155 All rights reserved.
156
157 Author: Keith Bostic, Chris G. Demetriou
158
159 Permission to use, copy, modify and distribute this software and
160 its documentation is hereby granted, provided that both the copyright
161 notice and this permission notice appear in all copies of the
162 software, derivative works or modified versions, and any portions
163 thereof, and that both notices appear in supporting documentation.
164
165 See individual files for license details, if you plan to redistribute GXemul
166 or reuse code.
167
168
169 Thanks to (in no specific order) Joachim Buss, Olivier Houchard, Juli Mallett,
170 Juan Romero Pardines, Alec Voropay, Göran Weinholt, Alexander Yurchenko, and
171 everyone else who has provided me with feedback.
172
173 If you have found GXemul useful in some way, or feel like sending me comments
174 or feedback in general, then mail me at anders(at)gavare.se.
175

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