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Added takeover methods for PMA Checker and RiscvTLB to ensure that checkpoint restoration works. Also added logic in PLIC to prevent posting interrupts to a CPU that has yet to complete the current interrupt. PLIC's behaviour when a CPU claims another interrupt before completion is also changed. Now PLIC will return the uncompleted interrupt ID instead of return 0. This behaviour is not documented in the specs but is designed this way to avoid issues from CPU side (especially MinorCPU). Change-Id: I68eaaf56d2c4d76cc1e0a1e2160f5abe184c2cd5 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41933 Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Ayaz Akram <yazakram@ucdavis.edu>
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.