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Andreas Sandberg cd098a7e84 dev: Add a simple DMA engine that can be used by devices Add a simple DMA engine that sits behind a FIFO. This engine can be used by devices that need to read large amounts of data (e.g., display controllers). Most aspects of the controller, such as FIFO size, maximum number of in-flight accesses, and maximum request sizes can be configured. The DMA copies blocks of data into its FIFO. Transfers are initiated with a call to startFill() command that takes a start address and a size. Advanced users can create a derived class that overrides the onEndOfBlock() callback that is triggered when the last request to a block has been issued. At this point, the DMA engine is ready to start fetching a new block of data, potentially from a different address range. The DMA engine stops issuing new requests while it is draining. Care must be taken to ensure that devices that are fed by a DMA engine are suspended while the system is draining to avoid buffer underruns.		2015-08-07 09:59:23 +01:00
build_opts	scons: Do not build the InOrderCPU	2015-01-20 08:12:45 -05:00
configs	misc: Coupling gem5 with SystemC TLM2.0	2015-08-03 23:08:40 -05:00
ext	ext: Add the NoMali GPU no-simulation library	2015-07-07 10:03:13 +01:00
src	dev: Add a simple DMA engine that can be used by devices	2015-08-07 09:59:23 +01:00
system	arm: Add support for ARMv8 (AArch64 & AArch32)	2014-01-24 15:29:34 -06:00
tests	stats: Reflect current behaviour	2015-08-05 04:36:29 -04:00
util	util: Enable DRAM sweep to print power and efficiency	2015-08-05 04:36:31 -04:00
.hgignore	ext: Add a McPAT regression tester	2014-06-04 07:48:20 -07:00
.hgtags	Added tag stable_2015_04_15 for changeset e17949745150	2015-04-15 16:04:37 -05:00
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	ext: Add the NoMali GPU no-simulation library	2015-07-07 10:03:13 +01:00

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.