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Currently the amdgpu simulated device is assumed to be a Vega10. As a result there are a few things that are hardcoded. One of those is the number of SDMAs. In order to add a newer device, such as MI100+, we need to enable a flexible number of SDMAs. In order to support a variable number of SDMAs and with the MMIO offsets of each device being potentially different, the MMIO interface for SDMAs is changed to use an SDMA class method dispatch table with forwards a 32-bit value from the MMIO packet to the MMIO functions in SDMA of the format `void method(uint32_t)`. Several changes are made to enable this: - Allow the SDMA to have a variable MMIO base and size. These are configured in python. - An SDMA class method dispatch table which contains the MMIO offset relative to the SDMA's MMIO base address. - An updated writeMMIO method to iterate over the SDMA MMIO address ranges and call the appropriate SDMA MMIO method which matches the MMIO offset. - Moved all SDMA related MMIO data bit twiddling, masking, etc. into the MMIO methods themselves instead of in the writeMMIO method in SDMAEngine. Change-Id: Ifce626f84d52f9e27e4438ba4e685e30dbf06dbc Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/70040 Maintainer: Matt Sinclair <mattdsinclair@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.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.