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Andreas Sandberg 184fefbb3b arm: Raise an alignment fault if a PC has illegal alignment We currently don't handle unaligned PCs correctly. There is one check for unaligned PCs in the TLB when running in aarch64 mode, but this check does not cover cases where the CPU does not do a TLB lookup when decoding an instruction (e.g., a branch stays within the same cache line). Additionally, the Decoder class sometimes throws an assertion for unaligned PCs which breaks speculation. This changeset introduces a decoder fault bit field in the ExtMachInst structure. This field can be used to signal a decoder failure. If set, the decoder generates an internal gem5fault instruction instead of a normal instruction. This instruction in turns either panics (fault type PANIC), returns an PCAlignmentFault (fault type UNALIGNED, aarch64) or PrefetchAbort (fault type UNALIGNED, aarch32). The patch causes minor changes to the realview64 regressions, and a stats bump will follow.		2014-12-23 09:31:17 -05:00
build_opts	alpha: Stop using 'inorder' and rely entirely on 'minor'	2014-09-03 07:42:56 -04:00
configs	config: Add options to take/resume from SimPoint checkpoints	2014-12-23 09:31:17 -05:00
ext	ext: Bump DRAMPower to avoid compilation issues	2014-10-20 18:03:53 -04:00
src	arm: Raise an alignment fault if a PC has illegal alignment	2014-12-23 09:31:17 -05:00
system	arm: Add support for ARMv8 (AArch64 & AArch32)	2014-01-24 15:29:34 -06:00
tests	stats: Bump stats for fixes, mostly TLB and WriteInvalidate	2014-12-02 06:08:25 -05:00
util	config: Fix to SystemC example's event handling	2014-12-02 06:08:09 -05:00
.hgignore	ext: Add a McPAT regression tester	2014-06-04 07:48:20 -07:00
.hgtags	Added tag stable_2014_12_14 for changeset bdb307e8be54	2014-12-14 16:21:04 -06:00
COPYING	copyright: Add code for finding all copyright blocks and create a COPYING file	2011-06-02 17:36:07 -07:00
LICENSE	copyright: Add code for finding all copyright blocks and create a COPYING file	2011-06-02 17:36:07 -07:00
README	misc: README direct to website for dependencies	2014-08-26 10:12:04 -04:00
SConstruct	scons: Make the USE_KVM variable available in C++.	2014-12-22 16:49:24 -08:00

README

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.