Gabe Black 946edc794f arch-x86: Implement count latching with the PIT read back command.
This command can trigger count latching for any of the PIT channels
together with a single command, and can also latch a status byte. The
status byte is not implemented here, but there is already functionality
for latching the count which this can use.

Change-Id: Ic2ad7c73d0c521fdd6fe5f62cb478c6718f3b90c
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/55283
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2022-01-15 01:53:01 +00:00
2020-10-22 01:01:46 +00:00
2020-07-14 18:41:37 +00:00
2017-03-01 11:58:37 +00:00
2021-09-23 23:14:55 +00:00

This is the gem5 simulator.

The main website can be found at http://www.gem5.org

A good starting point is http://www.gem5.org/about, and for
more information about building the simulator and getting started
please see http://www.gem5.org/documentation and
http://www.gem5.org/documentation/learning_gem5/introduction.

To build gem5, you will need the following software: g++ or clang,
Python (gem5 links in the Python interpreter), SCons, zlib, m4, and lastly
protobuf if you want trace capture and playback support. Please see
http://www.gem5.org/documentation/general_docs/building for more details
concerning the minimum versions of these tools.

Once you have all dependencies resolved, type 'scons
build/<CONFIG>/gem5.opt' where CONFIG is one of the options in build_opts like
ARM, NULL, MIPS, POWER, SPARC, X86, Garnet_standalone, etc. This will build an
optimized version of the gem5 binary (gem5.opt) with the the specified
configuration. See http://www.gem5.org/documentation/general_docs/building for
more details and options.

The main source tree includes these subdirectories:
   - build_opts: pre-made default configurations for gem5
   - build_tools: tools used internally by gem5's build process.
   - configs: example simulation configuration scripts
   - ext: less-common external packages needed to build gem5
   - include: include files for use in other programs
   - site_scons: modular components of the build system
   - src: source code of the gem5 simulator
   - system: source for some optional system software for simulated systems
   - tests: regression tests
   - util: useful utility programs and files

To run full-system simulations, you may need compiled system firmware, kernel
binaries and one or more disk images, depending on gem5's configuration and
what type of workload you're trying to run. Many of those resources can be
downloaded from http://resources.gem5.org, and/or from the git repository here:
https://gem5.googlesource.com/public/gem5-resources/

If you have questions, please send mail to gem5-users@gem5.org

Enjoy using gem5 and please share your modifications and extensions.
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