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2015-05-23base: Redesign internal frame buffer handlingAndreas Sandberg
Currently, frame buffer handling in gem5 is quite ad hoc. In practice, we pass around naked pointers to raw pixel data and expect consumers to convert frame buffers using the (broken) VideoConverter. This changeset completely redesigns the way we handle frame buffers internally. In summary, it fixes several color conversion bugs, adds support for more color formats (e.g., big endian), and makes the code base easier to follow. In the new world, gem5 always represents pixel data using the Pixel struct when pixels need to be passed between different classes (e.g., a display controller and the VNC server). Producers of entire frames (e.g., display controllers) should use the FrameBuffer class to represent a frame. Frame producers are expected to create one instance of the FrameBuffer class in their constructors and register it with its consumers once. Consumers are expected to check the dimensions of the frame buffer when they consume it. Conversion between the external representation and the internal representation is supported for all common "true color" RGB formats of up to 32-bit color depth. The external pixel representation is expected to be between 1 and 4 bytes in either big endian or little endian. Color channels are assumed to be contiguous ranges of bits within each pixel word. The external pixel value is scaled to an 8-bit internal representation using a floating multiplication to map it to the entire 8-bit range.
2014-09-03base: Use STL C++11 random number generationAndreas Hansson
This patch changes the random number generator from the in-house Mersenne twister to an implementation relying entirely on C++11 STL. The format for the checkpointing of the twister is simplified. As the functionality was never used this should not matter. Note that this patch does not actually make use of the checkpointing functionality. As the random number generator is not thread safe, it may be sensible to create one generator per thread, system, or even object. Until this is decided the status quo is maintained in that no generator state is part of the checkpoint.
2014-08-10base: Remove unused filesAndreas Hansson
A bit of pruning
2013-09-04arch: Resurrect the NOISA build target and rename it NULLAndreas Hansson
This patch makes it possible to once again build gem5 without any ISA. The main purpose is to enable work around the interconnect and memory system without having to build any CPU models or device models. The regress script is updated to include the NULL ISA target. Currently no regressions make use of it, but all the testers could (and perhaps should) transition to it. --HG-- rename : build_opts/NOISA => build_opts/NULL rename : src/arch/noisa/SConsopts => src/arch/null/SConsopts rename : src/arch/noisa/cpu_dummy.hh => src/arch/null/cpu_dummy.hh rename : src/cpu/intr_control.cc => src/cpu/intr_control_noisa.cc
2013-02-15loader: add a flattened device tree blob (dtb) objectAnthony Gutierrez
this adds a dtb_object so the loader can load in the dtb file for linux/android ARM kernels.
2013-02-10ruby: replace Time with Cycles in Message classNilay Vaish
Concomitant changes are being committed as well, including the io operator<< for the Cycles class.
2012-09-19AddrRange: Simplify Range by removing stream input/outputAndreas Hansson
This patch simplifies the Range class in preparation for the introduction of a more specific AddrRange class that allows interleaving/striping. The only place where the parsing was used was in the unit test.
2012-06-05sim: Remove FastAllocAli Saidi
While FastAlloc provides a small performance increase (~1.5%) over regular malloc it isn't thread safe. After removing FastAlloc and using tcmalloc I've seen a performance increase of 12% over libc malloc when running twolf for ARM.
2011-06-02scons: rename TraceFlags to DebugFlagsNathan Binkert
2011-05-12stats: delete mysql supportNathan Binkert
we can add it back within python in some future changeset
2011-05-12stats: move code that loops over all stats into pythonNathan Binkert
2011-02-11VNC: Add VNC server to M5Ali Saidi
2011-01-03Delete unused files from src/base directory.Steve Reinhardt
2010-11-19SCons: Support building without an ISAAli Saidi
2010-06-14stats: get rid of the never-really-used event stuffNathan Binkert
2010-04-18callback: Make helper functions that create callback objects for youNathan Binkert
clean up callback stuff a little bit while we're at it.
2009-02-26CPA: Add new object for gathering critical path annotations.Ali Saidi
2009-02-23stats: get rid of the convoluted 'database' code.Nathan Binkert
Just use the stuff directly and things ought to be more clear
2009-02-23debug: Move debug_break into src/baseNathan Binkert
2009-01-19tracing: Add help strings for some of the trace flagsNathan Binkert
2008-09-19atomicio: provide atomic read and write functions.Nathan Binkert
These functions keep trying to read and write until all data has been transferred, or an error occurrs. In the case where an end of file hasn't been reached, but all of the bytes have not been read/written, try again. On EINTR, try again.
2007-11-13Add in files from merge-bare-iron, get them compiling in FS and SE modeKorey Sewell
--HG-- extra : convert_revision : d4e19afda897bc3797868b40469ce2ec7ec7d251
2007-10-31Traceflags: Add SCons function to created a traceflag instead of having one ↵Ali Saidi
file with them all. --HG-- extra : convert_revision : 427f6bd8f050861ace3bc0d354a1afa5fc8319e6
2007-10-31Base: Rework the way M5 provides and creates random numbers.Ali Saidi
--HG-- extra : convert_revision : 10ec3484647b3acb8e821f8520f97d535e41e861
2007-06-09only compile fenv.c if we're using fenvNathan Binkert
--HG-- extra : convert_revision : 990726f724f99505fc999af82bfb1bbcd6c7f1a2
2007-04-21create base/fenv.c to standerdize fenv across platforms. It's a c file and ↵Ali Saidi
not a cpp file because c99 (which defines fenv) doesn't necessarily extend to c++ and it is a problem with solaris. If really desired this could wrap the ieeefp interface found in bsd* as well, but I see no need at the moment. src/arch/alpha/isa/fp.isa: src/arch/sparc/isa/formats/basic.isa: use m5_fesetround()/m5_fegetround() istead of fenv interface directly src/arch/sparc/isa/includes.isa: use base/fenv instead of fenv directly src/base/SConscript: add fenv to sconscript src/base/fenv.hh: src/base/random.cc: m5 implementation to standerdize fenv across platforms. --HG-- extra : convert_revision : 38d2629affd964dcd1a5ab0db4ac3cb21438e72c
2007-04-12Completely re-work how the scons framework incorporates swigNathan Binkert
and python code into m5 to allow swig an python code to easily added by any SConscript instead of just the one in src/python. This provides SwigSource and PySource for adding new files to m5 (similar to Source for C++). Also provides SimObject for including files that contain SimObject information and build the m5.objects __init__.py file. --HG-- extra : convert_revision : 38b50a0629846ef451ed02f96fe3633947df23eb
2007-03-26Instead of creating a new python process to run traceflags.py,Nathan Binkert
just directly exec the file and generate the flags --HG-- extra : convert_revision : d648ca7348404ded5337db327adafccbd2ae40c8
2007-03-10Rework the way SCons recurses into subdirectories, making itNathan Binkert
automatic. The point is that now a subdirectory can be added to the build process just by creating a SConscript file in it. The process has two passes. On the first pass, all subdirs of the root of the tree are searched for SConsopts files. These files contain any command line options that ought to be added for a particular subdirectory. On the second pass, all subdirs of the src directory are searched for SConscript files. These files describe how to build any given subdirectory. I have added a Source() function. Any file (relative to the directory in which the SConscript resides) passed to that function is added to the build. Clean up everything to take advantage of Source(). function is added to the list of files to be built. --HG-- extra : convert_revision : 103f6b490d2eb224436688c89cdc015211c4fd30