This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Revision 28 - (hide annotations)
Mon Oct 8 16:20:26 2007 UTC (13 years, 3 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,
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
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 (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 dpavlin 28 Release notes for Gavare's eXperimental Emulator (GXemul), 0.4.1
2     ================================================================
3 dpavlin 2
4 dpavlin 22 Copyright (C) 2003-2006 Anders Gavare.
5 dpavlin 2
7 dpavlin 14 GXemul is an experimental instruction-level machine emulator. Several
8     emulation modes are available. In some modes, processors and surrounding
9 dpavlin 12 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 dpavlin 2
12 dpavlin 22 The documentation lists the machines and guest operating systems that can
13 dpavlin 28 be regarded as "working" in GXemul. The best working guest operating
14 dpavlin 22 systems are probably NetBSD/pmax, NetBSD/cats, and OpenBSD/cats.
15 dpavlin 2
16 dpavlin 20
17 dpavlin 28 Changes between release and 0.4.1 include, among other things:
18 dpavlin 12
19 dpavlin 28 o) Some bugs in the dynamic translation core have been fixed, making
20     all emulation modes (especially the MIPS mode) more stable.
21 dpavlin 2
22 dpavlin 28 o) In the refactoring effort between 0.4.0 and, 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 dpavlin 10
27 dpavlin 28 o) MIPS emulation performance has been improved somewhat:
28 dpavlin 2
29 dpavlin 28 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 to make Linux and Ultrix run.
32     This gives an overall speedup for R2000/R3000.
33 dpavlin 2
34 dpavlin 28 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 dpavlin 2
39 dpavlin 28 o) A new -s command line option is now available, for dumping
40     raw runtime data/statistics on every instruction to a file.
41 dpavlin 2
42 dpavlin 28 Currently, the following kinds of data can be dumped:
43 dpavlin 20
44 dpavlin 28 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 dpavlin 24
49 dpavlin 28 This data can then be analyzed by external tools.
50 dpavlin 24
51 dpavlin 28 (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 dpavlin 24
55     Please read the HISTORY files for more details.
58 dpavlin 2 Files included in this release are:
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 dpavlin 4 configure, Makefile.skel sh and make scripts for building GXemul.
66 dpavlin 24 demos Tutorial-like demos of testmachine functionality.
67 dpavlin 2 doc Documentation.
68     experiments Experimental code. (Usually not needed.)
69 dpavlin 4 src Source code.
70 dpavlin 2
71 dpavlin 24 To build the emulator, run the configure script, and then run make. This
72 dpavlin 22 should work on most Unix-like systems.
73 dpavlin 2
74 dpavlin 24
75 dpavlin 4 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 dpavlin 2 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:
84     This product includes software developed by the University of
85     California, Berkeley and its contributors.
87     This product includes software developed for the
88     NetBSD Project. See http://www.netbsd.org/ for
89     information about NetBSD.
91     This product includes software developed by Jonathan Stone for
92     the NetBSD Project.
94     This product includes software developed for the NetBSD Project
95     by Matthias Drochner.
97     This product includes software developed by the NetBSD
98     Foundation, Inc. and its contributors.
100     This product includes software developed by Christopher G. Demetriou.
101     [for the NetBSD Project.]
103     This product includes software developed by Adam Glass.
105     This product includes software developed by the PocketBSD project
106     and its contributors.
108     This product includes software developed by Peter Galbavy.
110     Carnegie Mellon University (multiple header files,
111     no specific advertisement text required)
113     This product includes software developed by Charles M. Hannum.
115     This product includes software developed under OpenBSD by Per Fogelström.
117     This product includes software developed by Per Fogelström.
119     This product includes software developed at Ludd, University of
120     Luleå, Sweden and its contributors.
122     This product includes software developed by Hellmuth Michaelis
123     and Joerg Wunsch
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...)
130     impactsr-bsd.h is Copyright (C) 2004 by Stanislaw Skowronek.
132     This product includes software developed for the NetBSD Project by
133     Wasabi Systems, Inc. [by Simon Burge]
135     arcbios_other.h is Copyright (c) 1996 M. Warner Losh.
137     This product includes software developed by Marc Horowitz.
139 dpavlin 14 This product includes software developed by Brini.
141     This product includes software developed by Mark Brinicombe
142     for the NetBSD Project.
144 dpavlin 20 This product includes software developed by TooLs GmbH.
146     This product includes software developed by Manuel Bouyer.
148 dpavlin 22 This product includes software developed by the Alice Group.
150 dpavlin 24 This product includes software developed by Ichiro FUKUHARA.
152 dpavlin 12 Also, src/include/alpha_rpb.h requires the following:
154     Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
155     All rights reserved.
157     Author: Keith Bostic, Chris G. Demetriou
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.
165 dpavlin 2 See individual files for license details, if you plan to redistribute GXemul
166     or reuse code.
168 dpavlin 24
169 dpavlin 22 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 dpavlin 2
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.

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