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When using the typed register template, most functionality of the class can be controlled using callbacks. For instance, callbacks can be installed to handle reads or writes to a register without having to subclass the template and override those methods using inheritance. The recently added reset() method did not follow this pattern though, which has two problems. First, it's inconsistent with how the class is normally used. Second, once you've defined a subclass, the reader, writer, etc, callbacks still expect the type of the original class. That means these have to either awkwardly use a type different from the actual real type of the register, or use awkward, inefficient, and/or dangerous casting to get back to the true type. To address these problems, this change adds a resetter(...) method which works like the reader(...) or writer(...) methods to optionally install a callback to implement any special reset behavior. Change-Id: Ia74b36616fd459c1dbed9304568903a76a4b55de Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67203 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Yu-hsin Wang <yuhsingw@google.com> Maintainer: Gabe Black <gabeblack@google.com>
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.