gem5 - gem5

Age	Commit message (Collapse)	Author
2013-01-07	arch: Move the ISA object to a separate section	Andreas Sandberg
	After making the ISA an independent SimObject, it is serialized automatically by the Python world. Previously, this just resulted in an empty ISA section. This patch moves the contents of the ISA to that section and removes the explicit ISA serialization from the thread contexts, which makes it behave like a normal SimObject during serialization. Note: This patch breaks checkpoint backwards compatibility! Use the cpt_upgrader.py utility to upgrade old checkpoints to the new format.
2013-01-07	arch: Make the ISA class inherit from SimObject	Andreas Sandberg
	The ISA class on stores the contents of ID registers on many architectures. In order to make reset values of such registers configurable, we make the class inherit from SimObject, which allows us to use the normal generated parameter headers. This patch introduces a Python helper method, BaseCPU.createThreads(), which creates a set of ISAs for each of the threads in an SMT system. Although it is currently only needed when creating multi-threaded CPUs, it should always be called before instantiating the system as this is an obvious place to configure ID registers identifying a thread/CPU.
2013-01-07	o3: Fix issue with LLSC ordering and speculation	Ali Saidi
	This patch unlocks the cpu-local monitor when the CPU sees a snoop to a locked address. Previously we relied on the cache to handle the locking for us, however some users on the gem5 mailing list reported a case where the cpu speculatively executes a ll operation after a pending sc operation in the pipeline and that makes the cache monitor valid. This should handle that case by invaliding the local monitor.
2013-01-04	Decoder: Remove the thread context get/set from the decoder.	Gabe Black
	This interface is no longer used, and getting rid of it simplifies the decoders and code that sets up the decoders. The thread context had been used to read architectural state which was used to contextualize the instruction memory as it came in. That was changed so that the state is now sent to the decoders to keep locally if/when it changes. That's significantly more efficient. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2012-11-02	sim: Include object header files in SWIG interfaces	Andreas Sandberg
	When casting objects in the generated SWIG interfaces, SWIG uses classical C-style casts ( (Foo *)bar; ). In some cases, this can degenerate into the equivalent of a reinterpret_cast (mainly if only a forward declaration of the type is available). This usually works for most compilers, but it is known to break if multiple inheritance is used anywhere in the object hierarchy. This patch introduces the cxx_header attribute to Python SimObject definitions, which should be used to specify a header to include in the SWIG interface. The header should include the declaration of the wrapped object. We currently don't enforce header the use of the header attribute, but a warning will be generated for objects that do not use it.
2012-11-02	ISA: generic Linux thread info support	Dam Sunwoo
	This patch takes the Linux thread info support scattered across different ISA implementations (currently in ARM, ALPHA, and MIPS), and unifies them into a single file. Adds a few more helper functions to read out TGID, mm, etc. ISA-specific information (e.g., ALPHA PCBB register) is now moved to the corresponding isa_traits.hh files.
2012-08-28	Clock: Add a Cycles wrapper class and use where applicable	Andreas Hansson
	This patch addresses the comments and feedback on the preceding patch that reworks the clocks and now more clearly shows where cycles (relative cycle counts) are used to express time. Instead of bumping the existing patch I chose to make this a separate patch, merely to try and focus the discussion around a smaller set of changes. The two patches will be pushed together though. This changes done as part of this patch are mostly following directly from the introduction of the wrapper class, and change enough code to make things compile and run again. There are definitely more places where int/uint/Tick is still used to represent cycles, and it will take some time to chase them all down. Similarly, a lot of parameters should be changed from Param.Tick and Param.Unsigned to Param.Cycles. In addition, the use of curTick is questionable as there should not be an absolute cycle. Potential solutions can be built on top of this patch. There is a similar situation in the o3 CPU where lastRunningCycle is currently counting in Cycles, and is still an absolute time. More discussion to be had in other words. An additional change that would be appropriate in the future is to perform a similar wrapping of Tick and probably also introduce a Ticks class along with suitable operators for all these classes.
2012-08-15	sysemul: bump all linux versions of for syscal emulation to 3.0.	Ali Saidi
	New tool chains seem to be looking for kernel versions newer than what this this was previously set to. Also take this opportunity to change the hostname we report in uname to sim.gem5.org.
2012-08-06	syscall emulation: Clean up ioctl handling, and implement for x86.	Marc Orr
	Enable different whitelists for different OS/arch combinations, since some use the generic Linux definitions only, and others use definitions inherited from earlier Unix flavors on those architectures. Also update x86 function pointers so ioctl is no longer unimplemented on that platform. This patch is a revised version of Vince Weaver's earlier patch.
2012-06-08	Power: Fix MaxMiscDestRegs which was set to zero	Andreas Hansson
	This patch fixes a failing compilation caused by MaxMiscDestRegs being zero. According to gcc 4.6, the result is a comparison that is always false due to limited range of data type.
2012-06-05	ISA: Back-out NoopMachInst as a StaticInstPtr change.	Ali Saidi

2012-06-05	O3: Clean up the O3 structures and try to pack them a bit better.	Ali Saidi
	DynInst is extremely large the hope is that this re-organization will put the most used members close to each other.
2012-06-04	ISA: Turn the ExtMachInst NoopMachinst into the StaticInstPtr NoopStaticInst.	Gabe Black
	This eliminates a use of the ExtMachInst type outside of the ISAs.
2012-05-26	ISA,CPU: Generalize and split out the components of the decode cache.	Gabe Black
	This will allow it to be specialized by the ISAs. The existing caching scheme is provided by the BasicDecodeCache in the GenericISA namespace and is built from the generalized components. --HG-- rename : src/cpu/decode_cache.cc => src/arch/generic/decode_cache.cc
2012-05-26	CPU: Merge the predecoder and decoder.	Gabe Black
	These classes are always used together, and merging them will give the ISAs more flexibility in how they cache things and manage the process. --HG-- rename : src/arch/x86/predecoder_tables.cc => src/arch/x86/decoder_tables.cc
2012-05-25	ISA: Make the decode function part of the ISA's decoder.	Gabe Black

2012-05-25	Decode: Make the Decoder class defined per ISA.	Gabe Black
	--HG-- rename : src/cpu/decode.cc => src/arch/generic/decoder.cc rename : src/cpu/decode.hh => src/arch/generic/decoder.hh
2012-04-23	ISA: Put parser generated files in a "generated" directory.	Gabe Black
	This is to avoid collision with non-generated files.
2012-04-14	clang/gcc: Fix compilation issues with clang 3.0 and gcc 4.6	Andreas Hansson
	This patch addresses a number of minor issues that cause problems when compiling with clang >= 3.0 and gcc >= 4.6. Most importantly, it avoids using the deprecated ext/hash_map and instead uses unordered_map (and similarly so for the hash_set). To make use of the new STL containers, g++ and clang has to be invoked with "-std=c++0x", and this is now added for all gcc versions >= 4.6, and for clang >= 3.0. For gcc >= 4.3 and <= 4.5 and clang <= 3.0 we use the tr1 unordered_map to avoid the deprecation warning. The addition of c++0x in turn causes a few problems, as the compiler is more stringent and adds a number of new warnings. Below, the most important issues are enumerated: 1) the use of namespaces is more strict, e.g. for isnan, and all headers opening the entire namespace std are now fixed. 2) another other issue caused by the more stringent compiler is the narrowing of the embedded python, which used to be a char array, and is now unsigned char since there were values larger than 128. 3) a particularly odd issue that arose with the new c++0x behaviour is found in range.hh, where the operator< causes gcc to complain about the template type parsing (the "<" is interpreted as the beginning of a template argument), and the problem seems to be related to the begin/end members introduced for the range-type iteration, which is a new feature in c++11. As a minor update, this patch also fixes the build flags for the clang debug target that used to be shared with gcc and incorrectly use "-ggdb".
2012-03-26	Power: Change bitfield name to avoid conflicts with range_map	Andreas Hansson
	This patch changes the name of a bitfield from W to W_FIELD to avoid clashes with W being used as a class (typename) in the templatized range_map. It also changes L to L_FIELD to avoid future problems. The problem manifestes itself when the CPU includes a header that in turn includes range_map.hh. The relevant parts of the decoder are updated.
2012-03-09	CheckerCPU: Add function stubs to non-ARM ISA source to compile with CheckerCPU	Geoffrey Blake
	Making the CheckerCPU a runtime time option requires the code to be compatible with ISAs other than ARM. This patch adds the appropriate function stubs to allow compilation.
2012-02-24	MEM: Make port proxies use references rather than pointers	Andreas Hansson
	This patch is adding a clearer design intent to all objects that would not be complete without a port proxy by making the proxies members rathen than dynamically allocated. In essence, if NULL would not be a valid value for the proxy, then we avoid using a pointer to make this clear. The same approach is used for the methods using these proxies, such as loadSections, that now use references rather than pointers to better reflect the fact that NULL would not be an acceptable value (in fact the code would break and that is how this patch started out). Overall the concept of "using a reference to express unconditional composition where a NULL pointer is never valid" could be done on a much broader scale throughout the code base, but for now it is only done in the locations affected by the proxies.
2012-01-30	Merge with main repository.	Gabe Black

2012-01-30	MEM: Clean-up of Functional/Virtual/TranslatingPort remnants	Andreas Hansson
	This patch cleans up forward declarations and a member-function prototype that still referred to the old FunctionalPort, VirtualPort and TranslatingPort. There is no change in functionality.
2012-01-29	Implement Ali's review feedback.	Gabe Black
	Try to decrease indentation, and remove some redundant FullSystem checks.
2012-01-28	Merge with the main repo.	Gabe Black
	--HG-- rename : src/mem/vport.hh => src/mem/fs_translating_port_proxy.hh rename : src/mem/translating_port.cc => src/mem/se_translating_port_proxy.cc rename : src/mem/translating_port.hh => src/mem/se_translating_port_proxy.hh
2012-01-17	MEM: Add port proxies instead of non-structural ports	Andreas Hansson
	Port proxies are used to replace non-structural ports, and thus enable all ports in the system to correspond to a structural entity. This has the advantage of accessing memory through the normal memory subsystem and thus allowing any constellation of distributed memories, address maps, etc. Most accesses are done through the "system port" that is used for loading binaries, debugging etc. For the entities that belong to the CPU, e.g. threads and thread contexts, they wrap the CPU data port in a port proxy. The following replacements are made: FunctionalPort > PortProxy TranslatingPort > SETranslatingPortProxy VirtualPort > FSTranslatingPortProxy --HG-- rename : src/mem/vport.cc => src/mem/fs_translating_port_proxy.cc rename : src/mem/vport.hh => src/mem/fs_translating_port_proxy.hh rename : src/mem/translating_port.cc => src/mem/se_translating_port_proxy.cc rename : src/mem/translating_port.hh => src/mem/se_translating_port_proxy.hh
2012-01-07	Merge with main repository.	Gabe Black

2011-11-18	SE/FS: Get rid of includes of config/full_system.hh.	Gabe Black

2011-11-13	Power: Add a stubbed out stacktrace.cc	Gabe Black

2011-11-13	POWER: Add a stub implementation of initCPU.	Gabe Black

2011-11-13	Power: Add a stub kernel_stats.hh.	Gabe Black

2011-11-13	Power: Implement a stub for getArgument.	Gabe Black

2011-10-31	GCC: Get everything working with gcc 4.6.1.	Gabe Black
	And by "everything" I mean all the quick regressions.
2011-10-30	SE/FS: Remove the last references to FULL_SYSTEM from POWER.	Gabe Black

2011-10-22	SE: move page allocation from PageTable to Process	Steve Reinhardt
	PageTable supported an allocate() call that called back through the Process to allocate memory, but did not have a method to map addresses without allocating new pages. It makes more sense for Process to do the allocation, so this method was renamed allocateMem() and moved to Process, and uses a new map() call on PageTable. The remaining uses of the process pointer in PageTable were only to get the name and the PID, so by passing these in directly in the constructor, we can make PageTable completely independent of Process.
2011-10-22	syscall_emul: implement MAP_FIXED option to mmap()	Steve Reinhardt

2011-10-16	Power: Add a stub implementation for vtophys in SE and FS.	Gabe Black

2011-10-09	SE/FS: Build the Interrupt objects in SE mode.	Gabe Black

2011-09-27	Faults: Replace calls to genMachineCheckFault with M5PanicFault.	Gabe Black

2011-09-26	ISA parser: Use '_' instead of '.' to delimit type modifiers on operands.	Gabe Black
	By using an underscore, the "." is still available and can unambiguously be used to refer to members of a structure if an operand is a structure, class, etc. This change mostly just replaces the appropriate "."s with "_"s, but there were also a few places where the ISA descriptions where handling the extensions themselves and had their own regular expressions to update. The regular expressions in the isa parser were updated as well. It also now looks for one of the defined type extensions specifically after connecting "_" where before it would look for any sequence of characters after a "." following an operand name and try to use it as the extension. This helps to disambiguate cases where a "_" may legitimately be part of an operand name but not separate the name from the type suffix. Because leaving the "_" and suffix on the variable name still leaves a valid C++ identifier and all extensions need to be consistent in a given context, I considered leaving them on as a breadcrumb that would show what the intended type was for that operand. Unfortunately the operands can be referred to in code templates, the Mem operand in particular, and since the exact type of Mem can be different for different uses of the same template, that broke things.
2011-09-19	Faults: Get rid of the unused isAlignmentFault and isMachineCheckFault.	Gabe Black
	These functions aren't called anywhere and are probably only theoretically useful.
2011-09-09	StaticInst: Merge StaticInst and StaticInstBase.	Gabe Black
	Having two StaticInst classes, one nominally ISA dependent and the other ISA dependent, has not been historically useful and makes the StaticInst class more complicated that it needs to be. This change merges StaticInstBase into StaticInst.
2011-07-05	ISAs: Streamline some spots where Mem is used in the ISA descriptions.	Gabe Black

2011-07-05	ISA parser: Define operand types with a ctype directly.	Gabe Black

2011-07-05	ISA parser: Simplify operand type handling.	Gabe Black
	This change simplifies the code surrounding operand type handling and makes it depend only on the ctype that goes with each operand type. Future changes will allow defining operand types by their ctypes directly, convert the ISAs over to that style of definition, and then remove support for the old style. These changes are to make it easier to use non-builtin types like classes or structures as the type for operands.
2011-07-02	ISA: Use readBytes/writeBytes for all instruction level memory operations.	Gabe Black

2011-06-02	scons: rename TraceFlags to DebugFlags	Nathan Binkert

2011-05-23	syscall emul: fix Power Linux mmap constant, plus other cleanup	Steve Reinhardt
	We were getting a spurious warning in the regressions that turned out to be due to having the wrong value for TGT_MAP_ANONYMOUS for Power Linux, but in the process of tracking it down I ended up doing some cleanup of the mmap handling in general.
2011-05-13	Trace: Allow printing ASIDs and selectively tracing based on user/kernel code.	Chander Sudanthi
	Debug flags are ExecUser, ExecKernel, and ExecAsid. ExecUser and ExecKernel are set by default when Exec is specified. Use minus sign with ExecUser or ExecKernel to remove user or kernel tracing respectively.