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2018-03-27sparc: Add some missing M5_FALLTHROUGHs and breaks.Gabe Black
These fix what I believe are some bugs, and also some gcc warnings. Change-Id: I5fb2a1b2f0ef3643b25aaf0c29c096996ef98ec0 Reviewed-on: https://gem5-review.googlesource.com/9402 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-02-24sparc: Fix FS Checkpoint loadingKhalique
Proposed changes to SPARC FS simulation, testing indicates that checkpoints are now loaded correctly with the following command: build/SPARC/gem5.opt configs/example/fs.py -r 1 Change-Id: Icd44f01a74c41a78828ef6fd7b661e584bdb6966 Reviewed-on: https://gem5-review.googlesource.com/8581 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com>
2017-12-22arch,cpu: "virtualize" the TLB interface.Gabe Black
CPUs have historically instantiated the architecture specific version of the TLBs to avoid a virtual function call, making them a little bit more dependent on what the current ISA is. Some simple performance measurement, the x86 twolf regression on the atomic CPU, shows that there isn't actually any performance benefit, and if anything the simulator goes slightly faster (although still within margin of error) when the TLB functions are virtual. This change switches everything outside of the architectures themselves to use the generic BaseTLB type, and then inside the ISA for them to cast that to their architecture specific type to call into architecture specific interfaces. The ARM TLB needed the most adjustment since it was using non-standard translation function signatures. Specifically, they all took an extra "type" parameter which defaulted to normal, and translateTiming returned a Fault. translateTiming actually doesn't need to return a Fault because everywhere that consumed it just stored it into a structure which it then deleted(?), and the fault is stored in the Translation object when the translation is done. A little more work is needed to fully obviate the arch/tlb.hh header, so the TheISA::TLB type is still visible outside of the ISAs. Specifically, the TlbEntry type is used in the generic PageTable which lives in src/mem. Change-Id: I51b68ee74411f9af778317eff222f9349d2ed575 Reviewed-on: https://gem5-review.googlesource.com/6921 Maintainer: Gabe Black <gabeblack@google.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2016-11-09style: [patch 1/22] use /r/3648/ to reorganize includesBrandon Potter
2015-09-30isa,cpu: Add support for FS SMT InterruptsMitch Hayenga
Adds per-thread interrupt controllers and thread/context logic so that interrupts properly get routed in SMT systems.
2015-07-07sim: Refactor the serialization base classAndreas Sandberg
Objects that are can be serialized are supposed to inherit from the Serializable class. This class is meant to provide a unified API for such objects. However, so far it has mainly been used by SimObjects due to some fundamental design limitations. This changeset redesigns to the serialization interface to make it more generic and hide the underlying checkpoint storage. Specifically: * Add a set of APIs to serialize into a subsection of the current object. Previously, objects that needed this functionality would use ad-hoc solutions using nameOut() and section name generation. In the new world, an object that implements the interface has the methods serializeSection() and unserializeSection() that serialize into a named /subsection/ of the current object. Calling serialize() serializes an object into the current section. * Move the name() method from Serializable to SimObject as it is no longer needed for serialization. The fully qualified section name is generated by the main serialization code on the fly as objects serialize sub-objects. * Add a scoped ScopedCheckpointSection helper class. Some objects need to serialize data structures, that are not deriving from Serializable, into subsections. Previously, this was done using nameOut() and manual section name generation. To simplify this, this changeset introduces a ScopedCheckpointSection() helper class. When this class is instantiated, it adds a new /subsection/ and subsequent serialization calls during the lifetime of this helper class happen inside this section (or a subsection in case of nested sections). * The serialize() call is now const which prevents accidental state manipulation during serialization. Objects that rely on modifying state can use the serializeOld() call instead. The default implementation simply calls serialize(). Note: The old-style calls need to be explicitly called using the serializeOld()/serializeSectionOld() style APIs. These are used by default when serializing SimObjects. * Both the input and output checkpoints now use their own named types. This hides underlying checkpoint implementation from objects that need checkpointing and makes it easier to change the underlying checkpoint storage code.
2015-05-05mem, cpu: Add a separate flag for strictly ordered memoryAndreas Sandberg
The Request::UNCACHEABLE flag currently has two different functions. The first, and obvious, function is to prevent the memory system from caching data in the request. The second function is to prevent reordering and speculation in CPU models. This changeset gives the order/speculation requirement a separate flag (Request::STRICT_ORDER). This flag prevents CPU models from doing the following optimizations: * Speculation: CPU models are not allowed to issue speculative loads. * Write combining: CPU models and caches are not allowed to merge writes to the same cache line. Note: The memory system may still reorder accesses unless the UNCACHEABLE flag is set. It is therefore expected that the STRICT_ORDER flag is combined with the UNCACHEABLE flag to prevent this behavior.
2014-10-16arch: Use shared_ptr for all FaultsAndreas Hansson
This patch takes quite a large step in transitioning from the ad-hoc RefCountingPtr to the c++11 shared_ptr by adopting its use for all Faults. There are no changes in behaviour, and the code modifications are mostly just replacing "new" with "make_shared".
2014-05-31style: eliminate equality tests with true and falseSteve Reinhardt
Using '== true' in a boolean expression is totally redundant, and using '== false' is pretty verbose (and arguably less readable in most cases) compared to '!'. It's somewhat of a pet peeve, perhaps, but I had some time waiting for some tests to run and decided to clean these up. Unfortunately, SLICC appears not to have the '!' operator, so I had to leave the '== false' tests in the SLICC code.
2013-10-15mem: Rename the ASI_BITS flag field in RequestAndreas Sandberg
ASI_BITS in the Request object were originally used to store a memory request's ASI on SPARC. This is not the case any more since other ISAs use the ASI bits to store architecture-dependent information. This changeset renames the ASI_BITS to ARCH_BITS which better describes their use. Additionally, the getAsi() accessor is renamed to getArchFlags().
2013-06-03arch: Create a method to finalize physical addressesAndreas Sandberg
in the TLB Some architectures (currently only x86) require some fixing-up of physical addresses after a normal address translation. This is usually to remap devices such as the APIC, but could be used for other memory mapped devices as well. When running the CPU in a using hardware virtualization, we still need to do these address fix-ups before inserting the request into the memory system. This patch moves this patch allows that code to be used by such CPUs without doing full address translations.
2013-01-07arch: Add support for invalidating TLBs when drainingAndreas Sandberg
This patch adds support for the memInvalidate() drain method. TLB flushing is requested by calling the virtual flushAll() method on the TLB. Note: This patch renames invalidateAll() to flushAll() on x86 and SPARC to make the interface consistent across all supported architectures.
2012-08-28Clock: Add a Cycles wrapper class and use where applicableAndreas 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.
2012-03-09CheckerCPU: Add function stubs to non-ARM ISA source to compile with CheckerCPUGeoffrey 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.
2011-10-13SPARC: Remove the last checks of FULL_SYSTEM.Gabe Black
2011-10-10SPARC: Turn on handleIprRead and handleIprWrite in SE in SPARC.Gabe Black
2011-06-19sparc: init. cache state in TLBKorey Sewell
valgrind complains and its a potential source of instability, so go ahead and set it to 0 to start
2011-04-15trace: reimplement the DTRACE function so it doesn't use a vectorNathan Binkert
At the same time, rename the trace flags to debug flags since they have broader usage than simply tracing. This means that --trace-flags is now --debug-flags and --trace-help is now --debug-help
2011-04-15includes: sort all includesNathan Binkert
2011-03-01Spelling: Fix the a spelling error by changing mmaped to mmapped.Gabe Black
There may not be a formally correct spelling for the past tense of mmap, but mmapped is the spelling Google doesn't try to autocorrect. This makes sense because it mirrors the past tense of map->mapped and not the past tense of cape->caped. --HG-- rename : src/arch/alpha/mmaped_ipr.hh => src/arch/alpha/mmapped_ipr.hh rename : src/arch/arm/mmaped_ipr.hh => src/arch/arm/mmapped_ipr.hh rename : src/arch/mips/mmaped_ipr.hh => src/arch/mips/mmapped_ipr.hh rename : src/arch/power/mmaped_ipr.hh => src/arch/power/mmapped_ipr.hh rename : src/arch/sparc/mmaped_ipr.hh => src/arch/sparc/mmapped_ipr.hh rename : src/arch/x86/mmaped_ipr.hh => src/arch/x86/mmapped_ipr.hh
2011-01-03Make commenting on close namespace brackets consistent.Steve Reinhardt
Ran all the source files through 'perl -pi' with this script: s|\s*(};?\s*)?/\*\s*(end\s*)?namespace\s*(\S+)\s*\*/(\s*})?|} // namespace $3|; s|\s*};?\s*//\s*(end\s*)?namespace\s*(\S+)\s*|} // namespace $2\n|; s|\s*};?\s*//\s*(\S+)\s*namespace\s*|} // namespace $1\n|; Also did a little manual editing on some of the arch/*/isa_traits.hh files and src/SConscript.
2010-11-11SPARC: Clean up some historical style issues.Gabe Black
2010-09-13Faults: Pass the StaticInst involved, if any, to a Fault's invoke method.Gabe Black
Also move the "Fault" reference counted pointer type into a separate file, sim/fault.hh. It would be better to name this less similarly to sim/faults.hh to reduce confusion, but fault.hh matches the name of the type. We could change Fault to FaultPtr to match other pointer types, and then changing the name of the file would make more sense.
2010-08-13CPU: Tidy up endianness handling for mmapped "IPR"s.Gabe Black
2009-08-01Clean up some inconsistencies with Request flags.Steve Reinhardt
2009-07-09SPARC: Fold the MiscRegFile all the way into the ISA object.Gabe Black
2009-04-08tlb: More fixing of unified TLBNathan Binkert
2009-04-08tlb: Don't separate the TLB classes into an instruction TLB and a data TLBGabe Black
2009-02-25CPU: Implement translateTiming which defers to translateAtomic, and convert ↵Gabe Black
the timing simple CPU to use it.
2009-02-25ISA: Replace the translate functions in the TLBs with translateAtomic.Gabe Black
2009-01-30Errors: Use the correct panic/warn/fatal/info message in some places.Ali Saidi
2008-11-10mem: update stuff for changes to Packet and RequestNathan Binkert
2008-10-21style: Use the correct m5 style for things relating to interrupts.Nathan Binkert
2008-10-12CPU: Eliminate the get_vec function.Gabe Black
2008-09-27gcc: Add extra parens to quell warnings.Nathan Binkert
Even though we're not incorrect about operator precedence, let's add some parens in some particularly confusing places to placate GCC 4.3 so that we don't have to turn the warning off. Agreed that this is a bit of a pain for those users who get the order of operations correct, but it is likely to prevent bugs in certain cases.
2008-09-23sparc: Fix style, create a helper function for translation.Nathan Binkert
The translate function simplifies code and removes some compiler warnings in gcc 3.4
2008-02-26TLB: Make a TLB base class and put a virtual demapPage function in it.Gabe Black
--HG-- extra : convert_revision : cc0e62a5a337fd5bf332ad33bed61c0d505a936f
2008-01-01SPARC: Fix a bug where the TLB would match against the wrong entries.Gabe Black
--HG-- extra : convert_revision : 631b3b6a1416121b54bd9717ca1cdccdd5b8a1eb
2007-11-30SPARC: Fixes for invalidateAll and demapAll in the SPARC TLBs.Gabe Black
--HG-- extra : convert_revision : 8de6c60b0e3e725eac11047a9d9888097dd359ff
2007-11-19Serialization: Serialize SPARC PTEs last so their nameOut() calls don't ↵Ali Saidi
interfere with other serialization in the TLB. --HG-- extra : convert_revision : 8a8478a200cd3c65b2ac98944d1278454811d38f
2007-09-28Rename cycles() function to ticks()Ali Saidi
--HG-- extra : convert_revision : 790eddb793d4f5ba35813d001037bd8601bd76a5
2007-08-30params: Deprecate old-style constructors; update most SimObject constructors.Miles Kaufmann
SimObjects not yet updated: - Process and subclasses - BaseCPU and subclasses The SimObject(const std::string &name) constructor was removed. Subclasses that still rely on that behavior must call the parent initializer as : SimObject(makeParams(name)) --HG-- extra : convert_revision : d6faddde76e7c3361ebdbd0a7b372a40941c12ed
2007-08-26Address Translation: Make SE mode use an actual TLB/MMU for translation like FS.Gabe Black
--HG-- extra : convert_revision : a04a30df0b6246e877a1cea35420dbac94b506b1
2007-08-26SPARC: Make sure unaligned access are caught on cached translations as well.Gabe Black
--HG-- extra : convert_revision : 5c1f3f585817a19a771164f809dfc2fdc1ab3fb2
2007-08-13SPARC: Move tlb state into the tlb.Gabe Black
Each "strand" may need to have a private copy of this state, but I couldn't find anywhere in the spec that said that after looking briefly. This prevents writes to the thread context in o3 which was causing the pipeline to be flushed and stopping any forward progress. The other ASI accessible state will probably need to be accessed differently if/when we get O3 full system up and running. --HG-- extra : convert_revision : fa7fba812d7f76564ef4a23818e60f536710d557
2007-08-13SPARC: Make the spill and fill handlers use the correct ASI, and let ↵Gabe Black
No_Fault ASI accesses work. --HG-- extra : convert_revision : 3321bb91da02c1bec27fa34d0ba945cc976b6491
2007-07-26Merge python and x86 changes with cache branchNathan Binkert
--HG-- extra : convert_revision : e06a950964286604274fba81dcca362d75847233
2007-07-23Major changes to how SimObjects are created and initialized. Almost allNathan Binkert
creation and initialization now happens in python. Parameter objects are generated and initialized by python. The .ini file is now solely for debugging purposes and is not used in construction of the objects in any way. --HG-- extra : convert_revision : 7e722873e417cb3d696f2e34c35ff488b7bff4ed
2007-06-30Get rid of Packet result field. Error responses areSteve Reinhardt
now encoded in cmd field. --HG-- extra : convert_revision : d67819b7e3ee4b9a5bf08541104de0a89485e90b
2007-03-08Panic if any CMT registers are accessedAli Saidi
src/arch/sparc/asi.cc: src/arch/sparc/asi.hh: add CMT ASI registers src/arch/sparc/tlb.cc: Panic if any of the CMT registers are being accessed --HG-- extra : convert_revision : b9a94281e2074a576ac21d042b756950d509e758