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The ISAs we support today mostly have a micropc, whether that's used very heavily like on x86, or sparsely like on ARM, RISCV or SPARC. Only MIPS and POWER don't currently use a micropc, and neither of those is performance tuned to the point where adding some size to the PC object should make a meaningful difference. Because most ISAs already have a micropc anyway, and some minimal part of managing the micropc has to be part of the guaranteed interface so that the CPUs can work, it's a small step to make the micropc more completely part of the base class. This change also makes uReset part of the guaranteed interface so we can get rid of an #if THE_ISA == in the minor CPU. Jira Issue: https://gem5.atlassian.net/browse/GEM5-1060 Change-Id: Ide55a8feaee0bd5fff1d7ec05f95ad30a496b196 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/48704 Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu> Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@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, SWIG, 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 the aforementioned tools. Once you have all dependencies resolved, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ARM, NULL, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. See http://www.gem5.org/documentation/general_docs/building for more details and options. The basic source release includes these subdirectories: - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - 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 will need compiled system firmware (console and PALcode for Alpha), kernel binaries and one or more disk images. If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.