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The existing device tree generation method would use the default frequency as both the min and max frequency when setting up the OSC device tree nodes. This would sort of work, except it seems that if the kernel needed to adjust a frequency, it would fail to do so since it would assume the new frequency was out of range. Since the existing property is used to set the initial frequency of those clocks, and because the default, min and max frequencies are all mostly independent variables (other than obvious ordering restrictions), two new properties were added, min_freq and max_freq, which are only there to fill in the frequency range property in the device tree. If they aren't set, then the device tree generation method falls back to the old way of using the default frequency as both min and max. Change-Id: Ie907bd673f8bcb149e69e45c5b486863149b8a68 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/37935 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.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.