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Contents of /trunk/src/include/testmachine/README

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Revision 44 - (show annotations)
Mon Oct 8 16:22:56 2007 UTC (13 years, 3 months ago) by dpavlin
File size: 1530 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1632 2007/09/11 21:46:35 debug Exp $
20070616	Implementing the MIPS32/64 revision 2 "ror" instruction.
20070617	Adding a struct for each physpage which keeps track of which
		ranges within that page (base offset, length) that are
		continuously translatable. When running with native code
		generation enabled (-b), a range is added after each read-
		ahead loop.
		Experimenting with using the physical program counter sample
		data (implemented 20070608) together with the "translatable
		range" information, to figure out which physical address ranges
		would be worth translating to native code (if the number of
		samples falling within a range is above a certain threshold).
20070618	Adding automagic building of .index comment files for
		src/file/, src/promemul/, src src/useremul/ as well.
		Adding a "has been translated" bit to the ranges, so that only
		not-yet-translated ranges will be sampled.
20070619	Moving src/cpu.c and src/memory_rw.c into src/cpus/,
		src/device.c into src/devices/, and src/machine.c into
		Creating a skeleton cc/ld native backend module; beginning on
		the function which will detect cc command line, etc.
20070620	Continuing on the native code generation infrastructure.
20070621	Moving src/x11.c and src/console.c into a new src/console/
		subdir (for everything that is console or framebuffer related).
		Moving src/symbol*.c into a new src/symbol/, which should
		contain anything that is symbol handling related.
20070624	Making the program counter sampling threshold a "settings
		variable" (sampling_threshold), i.e. it can now be changed
		during runtime.
		Switching the RELEASE notes format from plain text to HTML.
		If the TMPDIR environment variable is set, it is used instead
		of "/tmp" for temporary files.
		Continuing on the cc/ld backend: simple .c code is generated,
		the compiler and linker are called, etc.
		Adding detection of host architecture to the configure script
		(again), and adding icache invalidation support (only
		implemented for Alpha hosts so far).
20070625	Simplifying the program counter sampling mechanism.
20070626	Removing the cc/ld native code generation stuff, program
		counter sampling, etc; it would not have worked well in the
		general case.
20070627	Removing everything related to native code generation.
20070629	Removing the (practically unusable) support for multiple
		emulations. (The single emulation allowed now still supports
		multiple simultaneous machines, as before.)
		Beginning on PCCTWO and M88K interrupts.
20070723	Adding a dummy skeleton for emulation of M32R processors.
20070901	Fixing a warning found by "gcc version 4.3.0 20070817
		(experimental)" on amd64.
20070905	Removing some more traces of the old "multiple emulations"
		Also looking in /usr/local/include and /usr/local/lib for
		X11 libs, when running configure.
20070909	Minor updates to the guest OS install instructions, in
		preparation for the NetBSD 4.0 release.
20070918	More testing of NetBSD 4.0 RC1.

1 $Id: README,v 1.4 2007/06/16 01:12:32 debug Exp $
3 The files in this directory describe the devices found in GXemul's "test
4 machines". These machines do not match any real-world machines, but they
5 have devices that are similar to those found in real machines:
7 o) console (dev_cons):
8 A simple console device, with putchar() and getchar()
9 functionality. It also has a halt() function, to make it easy
10 to exit from the emulator.
12 o) disk (dev_disk):
13 Used for reading and writing 512-byte sectors from/to disk images.
15 o) ethernet (dev_ether):
16 A very simple ethernet NIC, capable of sending and receiving
17 ethernet frames on the simulated network.
19 o) framebuffer (dev_fb):
20 640 x 480 pixels, 3 bytes per pixel, red-green-blue
22 o) interrupt controller (dev_irqc):
23 A generic interrupt controller. (Not used by the MIPS test machine.)
25 o) mp (dev_mp):
26 A multiprocessor inter-processor communication device.
27 It also contains other useful functionality, such as retrieving
28 the amount of "physical" RAM installed in the emulated machine.
30 o) rtc (dev_rtc):
31 A Real-Time Clock device. Used to retrieve the current time, and
32 to cause periodic interrupts at a specific frequency.
34 These include files are not released under the same license as GXemul
35 itself. The include files are released as public domain, so they can be
36 reused also in projects that have BSD-incompatible licenses.
38 Please read the GXemul documentation for more details on how to use the
39 testmachine devices, and study the demo programs.

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