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2018-06-25syscall_emul: adding symlink system callMatt Sinclair
Change-Id: Iebda05c130b4d2ee8434cad1e703933bfda486c8 Reviewed-on: https://gem5-review.googlesource.com/11490 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-06-25syscall_emul: adding link system callMatt Sinclair
Change-Id: If8922c2233bbe1f6fce35f64d1a44b91d2cfeed2 Reviewed-on: https://gem5-review.googlesource.com/11489 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Brandon Potter <Brandon.Potter@amd.com>
2018-06-22mem-cache: Promote deferred targets on cache clean responsesNikos Nikoleris
While a cache clean operation is pending, all requests to the corresponding block get deferred. When the response of a cache clean operation is received, if the block is present and the response is not invalidating, we can service all deferred targets that didn't require writable. This change implements this functionality. Change-Id: Ief47e74d07749a6a9736ab450eb46eefa53464a2 Reviewed-on: https://gem5-review.googlesource.com/11018 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-06-22mem-cache: Promote targets that don't require writableNikos Nikoleris
Until now, all deferred targets of an MSHR would be promoted together as soon as the targets were serviced. Due to the way we handle cache clean operations we might need to promote only deferred targets that don't require writable, leaving some targets as deferred. This change adds support for this selective promotion. Change-Id: I502e523dc9adbaf394955cbacea8286ab6a9b6bc Reviewed-on: https://gem5-review.googlesource.com/11017 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-06-22mem-cache: Fix promoting of targets that need writableNikos Nikoleris
There are cases where a request which does not need a writable copy gets an response upgraded reponse and fills in a writable copy. When this happens, we promote deferred MSHR targets that were deferred because they needed a writable copy to service them immediately. Previously, we would uncoditionally promote deferred targets. Since the deferred targets might contain a cache invalidation operation, we have to make sure that any targets following the cache invalidation is not promoted. Change-Id: I1f7b28f7d35f84329e065c8f63117db21852365a Reviewed-on: https://gem5-review.googlesource.com/11016 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-06-22mem-cache: Selectively clear downstream pendingNikos Nikoleris
Until now, all deferred targets of an MSHR would be promoted together as soon as the targets were serviced. When we promote deferred targets we also clear the downstreamPending flag. Due to the way we handle cache clean operations we might need to promote only deferred targets that don't require writable, leaving some targets as deferred. To allow for partial target promotion, this change adds support for clearing the downstreamPending only for a subset of a TargetsList. Change-Id: Id06953643ba9a975ebacc76ac10215441e264e74 Reviewed-on: https://gem5-review.googlesource.com/11015 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-06-22arch-arm: AArch32 execution triggering AArch64 SW BreakGiacomo Travaglini
AArch32 Software Breakpoint (BKPT) can trigger an AArch64 fault when interprocessing if the trapping conditions are met. Change-Id: I485852ed19429f9cd928a6447a95eb6f471f189c Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/11197 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-06-22arch-arm: BadMode checking if corresponding EL is implementedGiacomo Travaglini
The old utility function called badMode was only checking if the mode passed as an argument was a recognized mode. It was not checking if the corresponding mode/EL was implemented. That function has been renamed to unknownMode and a new badMode has been introduced. This is used by the cpsrWriteByInstruction function. In this way any try to change the execution mode won't succeed if the mode hasn't been implemented. Change-Id: Ibfe385c5465b904acc0d2eb9647710891d72c9df Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/11196 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-06-21base: Add a class which encapsulates Fibers.Gabe Black
This class encapsulates the idea of a Fiber in such a way that other implementations can be substituted in in the future. This implementation uses the ucontext family of functions. This change also adds a new unit test which exercises the new class. It creates three new fibers which accept a sequence of other fibers to switch to, one after the other. The main test function switches to the these fibers which switch with each other and occasionally back to the main fiber. Each time a test fiber is activated, it checks against a list which shows the correct order for the fibers to run in. When the main fiber gets control, it makes sure that list has been progressed through by the correct amount. Change-Id: I1fc2afa414b51baaa91e350a4ebc791d989f0b8a Reviewed-on: https://gem5-review.googlesource.com/10935 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-06-21sim: Use the canonical way of iterating over a dictionaryAndreas Sandberg
Instead of using a convoluted getattr call, use the conventional iteritems() interface. Change-Id: I6d6bbccf865f8a0e8ff0767914157a7460099b09 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10782 Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2018-06-21dev-arm: Use recurseDeviceTree instead of custom in platformAndreas Sandberg
The platform code uses a custom mechanism to traverse the object hierarchy when generating device trees. This is highly undesirable since this breaks for common cases such as when SimObjects are stored in a list. Change-Id: I1b968e5fa1db62f1456e3c0ac3de47ab1299e58d Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10781 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
2018-06-21cpu: Fix bug introduced by RequestPtr type changeGiacomo Travaglini
Missing buffer allocation in mwaitAtomic. Change-Id: Ifccb6df2427df8b0daac5ee6a99e5cca0b20825e Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/11469 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-06-20base: Fix includes in AddrRangeMap header fileNikos Nikoleris
Change-Id: I4bdd6cf7c8d22219c0582ab206ec8372a4357759 Reviewed-on: https://gem5-review.googlesource.com/11429 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-06-20mem-cache: Fix TempCacheBlock insertJason Lowe-Power
TempCacheBlock insert() had a different signature than the parent class which caused an error on clang. This matches the signature with default zero values. Change-Id: Ic096914497f3d17e88295c9e65a04d76fdddf365 Signed-off-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-on: https://gem5-review.googlesource.com/11349 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-19mem: Use address range to find the right physical addressNikos Nikoleris
Previously, we used the start address to determine the right physical memory while servicing memory requests. This change uses the full address range to correctly determine the right physical memory and expose bugs where requests might not fully map to a single physical memory. Change-Id: I183d7552918106000f917a62ceb877511ff0ff71 Reviewed-on: https://gem5-review.googlesource.com/11118 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-19mem: Use address range to find the destination port in the xbarNikos Nikoleris
Previously the xbar used the start address to lookup the port map and determine the right destination of an incoming packet. This change uses the full address range to correctly determine the right master. Change-Id: I5118712c43ae65aba64e71bf030bca5c99770bdd Reviewed-on: https://gem5-review.googlesource.com/11117 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-19mem: Use the caching in the AddrRangeMap class in PhysicalMemoryGabe Black
Use it instead of custom implemented caching. Change-Id: Ie21012a77a3cb6ce57f34f879fa391678913896a Reviewed-on: https://gem5-review.googlesource.com/5244 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-19mem: Use the caching built into AddrRangeMap in the xbarGabe Black
Use that instead of caching built into the crossbar. Change-Id: If5a5355a0a1a6e532b14efc88a319de4c023f8c1 Reviewed-on: https://gem5-review.googlesource.com/5243 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-19base: Build caching into the AddrRangeMap classGabe Black
Rather than have each consumer of the AddrRangeMap implement caching lookups on their own, this change adds a centralized mechanism to the AddrRangeMap class itself. Some benefits of this approach are that the cache handles deleted entries correctly/automatically, the cache is maintained by adding/removing entries from a linked list rather than moving elements in an array and checking valid bits, and it's easy to enable in places which might otherwise not bother with caching. The amount of caching is tunable to balance overhead with improved lookup performance. Change-Id: Ic25997e23de4eea501e47f039bb52ed0502c58d2 Reviewed-on: https://gem5-review.googlesource.com/5242 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-19base, mem: Disambiguate if an addr range is contained or overlapsNikos Nikoleris
We need to determined whether an address range is fully contained or it overlaps with an address range in the address range in the mmap. As an example, we use address range maps to associate ports to address ranges and we determine which port we will forward the request based on which address range contains the addresses accessed by the request. We also need to make sure that when we add a new port to the address range map, its address range does not overlap with any of the existing ports. This patch splits the function find() into two functions contains() and intersects() to implement this distinct functionality. It also changes the xbar and the physical memory to use the right function. Change-Id: If3fd3f774a16b27db2df76dc04f1d61824938008 Reviewed-on: https://gem5-review.googlesource.com/11115 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-19mem-cache: Fix support for secure blocks in the FALRU cacheNikos Nikoleris
Fully associative caches use an unordered map to enable efficient lookups of existing blocks. Previously this map was indexed using the tag of the block. Security extentions allow secure and non secure versions of a block with the same tag to co-exist in the cache. This patch amends the block map to allow correct lookups for FALRU caches. Change-Id: Iccf07464deab56d1d270bae14bb3b154047e3556 Reviewed-on: https://gem5-review.googlesource.com/11309 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-15mem-cache: Initialize CacheBlk data pointerDaniel R. Carvalho
Initialize CacheBlk's data pointer as a nullptr. Change-Id: Ice85b4b11495cad4b0a160ccb9efe1be673e57e2 Reviewed-on: https://gem5-review.googlesource.com/11097 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-15mem-cache: Forward declare ReplaceableEntryDaniel R. Carvalho
Forward declare ReplaceableEntry where in classes where pointers to it are used. Change-Id: I49c08d36442a563d7a6b4c9bcd7eba3591d29b60 Reviewed-on: https://gem5-review.googlesource.com/11096 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-15dev-arm: Fix the address range for some I/O devicesNikos Nikoleris
Previously, many devices were incorrecty configured to respond to an address range of size 0xfff. This changes fixes this and sets it to 0x1000. Change-Id: I4b027a27adf60ceae4859e287d7f34443b398752 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/11116 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-06-15sim: Add a SimObject python field which overrides the default c++ base.Gabe Black
The base for the c++ version of python SimObject classes is normally inferred from the c++ version of the python base. There are some specific cases where that isn't desired. This change makes it possible to override the default behavior. Change-Id: I2438dad767e2f56823bad42b3e6c7714ce97ef79 Reviewed-on: https://gem5-review.googlesource.com/10662 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2018-06-14cpu: Prevent suspended TimingSimple CPUs from fetching next instructionsTuan Ta
In TimingSimpleCPU model, when a CPU is suspended by a syscall (e.g., futex(FUTEX_WAIT)), the CPU waits for another CPU to wake it up (e.g., FUTEX_WAKE operation). While staying Idle, the suspended CPU should not try to fetch next instructions after the syscall. This patch added a status check before a CPU schedule a fetch event after a fault is handled. Change-Id: I0cc953135686c9b35afe94942aa1d0b245ec60a2 Reviewed-on: https://gem5-review.googlesource.com/8181 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Brandon Potter <Brandon.Potter@amd.com>
2018-06-14cpu: add a new instruction type 'Atomic'Tuan Ta
This patch adds a new flag named 'Atomic' to support ISA implementations that use AtomicOpFunctor to handle atomic instructions instead of a pair of locking load and unlocking store. Change-Id: I1fbee6e54432396cb49dfc59ad9006b75812d115 Reviewed-on: https://gem5-review.googlesource.com/8187 Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
2018-06-14arch: support issuing Atomic Mem Operation (AMO) requestsTuan Ta
This patch adds two new functions named amoMemAtomic used in Atomic CPU model and initiateMemAMO used in Timing CPU models to issue AMO requests to the memory system. Change-Id: I962bdc0e5f25b72c170d96ebc136f29a2b230d5e Reviewed-on: https://gem5-review.googlesource.com/8186 Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
2018-06-14base,mem: Support AtomicOpFunctor in the classic memory systemTuan Ta
AtomicOpFunctor can be used to implement atomic memory operations. AtomicOpFunctor is captured inside a memory request and executed directly in the memory hierarchy in a single step. This patch enables AtomicOpFunctor pointers to be included in a memory request and executed in a single step in the classic cache system. This patch also makes the copy constructor of Request class do a deep copy of AtomicOpFunctor object. This prevents a copy of a Request object from accessing a deleted AtomicOpFunctor object. Change-Id: I6649532b37f711e55f4552ad26893efeb300dd37 Reviewed-on: https://gem5-review.googlesource.com/8185 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-14ruby: Revamp standalone SLICC scriptJason Lowe-Power
There was some bitrot in the standalone SLICC script (util/slicc and src/mem/slicc/main.py). Fix the changes to the SLICC interface and also add some better documentation. Change-Id: I91c0ec78d5072fba83edf32b661ae67967af7822 Signed-off-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-on: https://gem5-review.googlesource.com/10561 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-14arch-arm: Adapting IllegalExecution fault for AArch32Giacomo Travaglini
The Illegal Execution fault triggered by the setting of processor state PSTATE.IL happens in AArch32 as well and takes the form of UNDEFINED exception fault. We are hence copying the UndefinedInstruction AArch32 fields into the IllegalInstSetStateFault. Change-Id: Ibb7424397c2030ea5d010577c530277a27036aea Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10814 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-06-14arch-arm: Add Illegal Execution flag to PCStateGiacomo Travaglini
This patch moves the detection of the Illegal Execution flag (PSTATE.IL) from the tlb translation stage (fetch) to the decoding stage. This is done by adding the illegalExecution field to the PCState. Change-Id: I9c1c4e9c6bd5ded905c1d56b3034e4e9322582fa Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10813 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-06-14arch-arm: Read APSR in User ModeGiacomo Travaglini
This patch substitutes reads to the CPSR in user mode (MRS CPSR) to reads to APSR (Application Program Status Register). This is the user level alias for the CPSR. The APSR is a subset of the CPSR. Change-Id: I18a70693aef6fd305a4c4cb3c6f81f331bc60a2d Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10602 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-06-14dev-arm: Add new VExpress_GEM5_V1_Base PlatformRohit Kurup
Add a new VExpress_GEM5_V1_Base Platform which configures basic on chip devices. The original VExpress_GEM5_V1 will inherit the Base and add more on chip devices (currently only the HDLCD). This change will make it possible to create variations of the base platform with different devices. Change-Id: I21f9bf4f6217d87e811ff777f630122593eef013 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10807 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
2018-06-14cpu-minor: Remove redundant thread startup callAndreas Sandberg
Don't call startup() twice on each of the threads. Change-Id: Ibe3d1f25c4fdff291ee310abb9bcad3b184bab20 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/11037
2018-06-14dev-arm: Remove deprecated GIC test interfacesAndreas Sandberg
Change-Id: I4c5203b216387d9a4f041c7a00caea926e5cfca6 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10810
2018-06-13tests: Make "UnitTest"s more like GTest so they can be in other dirs.Gabe Black
The original implementation of UnitTest forced all the output binaries to live in the unittest directory, effectively forcing a flat namespace, and seperating the tests from the things they were supposed to be testing. This changes makes them work more like the newer GTest tests in that they can be based out of whatever directory makes sense, although they're currently all still in unittest for the time being. This change also gets rid of automatically tagging the sources associated with a test with the tests name. The first reason for that was that this also forced a flat namespace, since the tests names didn't have any reference to the test's path. Second, this way of pulling in additional files wasn't necessary any more, now that the UnitTest sources could be source filters like they can be for GTests. Change-Id: I3d96ed766ac5170842dbd6daee39f2873bcd6c75 Reviewed-on: https://gem5-review.googlesource.com/10701 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-06-13mem-cache: Remove unnecessary cast in SectorTags::findVictimNikos Nikoleris
Removes an uneccessary cast that also caused an unused variable error (due to -Werror) when compiling .fast targets. Change-Id: Ic043f462925e7eaa7b691455f1d9e08a1c101980 Reviewed-on: https://gem5-review.googlesource.com/11119 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-13arch-arm: Fix missing Request allocationGiacomo Travaglini
This patch is fixing a missing allocation for a Request buffer in the Stage2Translation class. Change-Id: I9ce7b85d3527c5b3cc895eb83e9a39641793b0bd Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/11095 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-06-13mem-cache: Insert on block allocationDaniel R. Carvalho
When a block is being replaced in an allocation, if successfull, the block will be inserted. Therefore we move the insertion functionality to allocateBlock(). allocateBlock's signature has been modified to allow this modification. Change-Id: I60d17a83ff4f3021fdc976378868ccde6c7507bc Reviewed-on: https://gem5-review.googlesource.com/10812 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-13mem-cache: Make packet const in insertBlockDaniel R. Carvalho
The packet should not be modified within insertBlock. Change-Id: If7d2b01fe131f9923194efd155c9e85eeab24d5a Reviewed-on: https://gem5-review.googlesource.com/10811 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-13mem-cache: Create Sector CacheDaniel R. Carvalho
Implementation of Sector Caches, i.e., a cache with multiple sequential data entries per tag entry for Set Associtive placement policies. Change-Id: I8e1e9448fa44ba308ccb16cd5bcc5fd36c988feb Reviewed-on: https://gem5-review.googlesource.com/9741 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-12ruby: Fix initial weight in weighted LRUDaniel R. Carvalho
Initial weight was using the timestamp instead of the weight. Change-Id: I61d3c8424f85fd6856957087c477afda111f8ca7 Reviewed-on: https://gem5-review.googlesource.com/10801 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
2018-06-11misc: Using smart pointers for memory RequestsGiacomo Travaglini
This patch is changing the underlying type for RequestPtr from Request* to shared_ptr<Request>. Having memory requests being managed by smart pointers will simplify the code; it will also prevent memory leakage and dangling pointers. Change-Id: I7749af38a11ac8eb4d53d8df1252951e0890fde3 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10996 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-11misc: Substitute pointer to Request with aliased RequestPtrGiacomo Travaglini
Every usage of Request* in the code has been replaced with the RequestPtr alias. This is a preparing patch for when RequestPtr will be the typdefed to a smart pointer to Request rather then a raw pointer to Request. Change-Id: I73cbaf2d96ea9313a590cdc731a25662950cd51a Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10995 Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
2018-06-08mem-cache: Change Cache block tag checkDaniel R. Carvalho
Change tag to address check for compatibility with sector design. Cache should not use tag, as sector sub-blocks share them, and it could lead to wrong accesses. Change-Id: Id1fa26f417595f475c5b5c07ae1f02f5fa0684ba Reviewed-on: https://gem5-review.googlesource.com/10723 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-08mem-cache: Use secure bit in findVictimDaniel R. Carvalho
Sector caches must know if there was a sector hit in order to decide whether a victim's sector must be fully evicted to give place to a new sector or not. In order to do so it needs the tag and secure information. Change-Id: Ib554169e25fa131d6bf986561f7970b787c56874 Reviewed-on: https://gem5-review.googlesource.com/10722 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-08mem-cache: Move tagsInUse to childrenDaniel R. Carvalho
Move tagsInUse to children, as sector caches have different tag invalidation and insertion, and thus they must handle updating this variable. Change-Id: I875c9b7364a909c76daf610d1e226c4e82063870 Reviewed-on: https://gem5-review.googlesource.com/10721 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-08mem-cache: Return evictions along with victimsDaniel R. Carvalho
For both sector and compressed caches multiple blocks may need to be evicted in order to make room for a new block. For example, when replacing a sector, all the blocks in this sector must be evicted. A replacement, however, does not always need to evict multiple blocks, as it is in the case of an insertion of a block whose sector is already present in the cache (i.e., its corresponding entry in the sector had not been brought in yet, so it was invalid). This patch creates the cache framework for that to happen. Change-Id: I77bedf69637cf899fef4d9432eb6da8529ea398b Reviewed-on: https://gem5-review.googlesource.com/10142 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
2018-06-08mem-cache: Use ReplaceableEntry in findBlockBySetAndWayDaniel R. Carvalho
With a sector cache you can't find a block using only its set and way, as there is the sector offset to take into account. As all of these blocks inherit from ReplaceableEntry, the return type of this function has been updated. This function has also been declared closer to findBlock() due to their similar functionality. Change-Id: I4730a2b4ebb5738f7fc118201e208a1b9c3ba8e8 Reviewed-on: https://gem5-review.googlesource.com/10141 Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
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