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GpuTlbEntry was derived from a vanilla X86ISA::TlbEntry definition. It wrapped the class and included an extra member "valid". This member was intended to report on the validity of the entry, however it introduced bugs when folks forgot to set field properly in the code. So, instead of keeping the extra field which we might forget to set, we track validity by using nullptr for invalid tlb entries (as the tlb entries are dynamically allocated). This saves on the extra class definition and prevents bugs creeping into the code since the checks are intrinsically tied into accessing any of the X86ISA::TlbEntry members. This changeset fixes the issues introduced by a8d030522,a4e722725, and2a15bfd79. Change-Id: I30ebe3ec223fb833f3795bf0403d0016ac9a8bc2 Reviewed-on: https://gem5-review.googlesource.com/10481 Reviewed-by: Brandon Potter <Brandon.Potter@amd.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.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.