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ARMv8 differs from ARMv7 with the presence of RVBAR register, which contains the implementation defined reset address when EL3 is not implemented. The entry 0x0 in the AArch32 vector table, once used for the Reset Vector, is now marked as "Not used", stating that it is now IMPLEMENTATION DEFINED. An implementation might still use this vector table entry to hold the Reset vector, but having a Reset address != than the general vector table (for any other exception) is allowed. At the moment any Reset exception is still using 0 as a vector table base address. This patch is extending the ArmSystem::resetAddr64 to ArmSystem::resetAddr so that it can be used for initializing MVBAR/RVBAR. In order to do so, we are providing a specialized behavior for the Reset exception when evaluating the vector base address. Change-Id: I051a730dc089e194db3b107bbed19251c661f87e Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/14000 Maintainer: Andreas Sandberg <andreas.sandberg@arm.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/Introduction, and for more information about building the simulator and getting started please see http://www.gem5.org/Documentation and http://www.gem5.org/Tutorials. 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/Dependencies 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 ALPHA, 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/Build_System for more details and options. With the simulator built, have a look at http://www.gem5.org/Running_gem5 for more information on how to use gem5. 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. Please see the gem5 download page for these items at http://www.gem5.org/Download If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.