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2013-04-17base: load weak symbols from object fileDeyuan Guo ext:(%2C%20Nilay%20Vaish%20%3Cnilay%40cs.wisc.edu%3E)
Without loading weak symbols into gem5, some function names and the given PC cannot correspond correctly, because the binding attributes of unction names in an ELF file are not only STB_GLOBAL or STB_LOCAL, but also STB_WEAK. This patch adds a function for loading weak symbols. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2013-03-07base: Fix address range granularity calculationsAndreas Hansson
This patch fixes a bug in the address range granularity calculations. Previously it incorrectly used the high bit to establish the size of the regions created, when it should really be looking at the low bit.
2013-02-19scons: Fix warnings issued by clang 3.2svn (XCode 4.6)Andreas Hansson
This patch fixes the warnings that clang3.2svn emit due to the "-Wall" flag. There is one case of an uninitialised value in the ARM neon ISA description, and then a whole range of unused private fields that are pruned.
2013-02-19scons: Add warning for missing declarationsAndreas Hansson
This patch enables warnings for missing declarations. To avoid issues with SWIG-generated code, the warning is only applied to non-SWIG code.
2013-02-19scons: Fix up numerous warnings about name shadowingAndreas Hansson
This patch address the most important name shadowing warnings (as produced when using gcc/clang with -Wshadow). There are many locations where constructor parameters and function parameters shadow local variables, but these are left unchanged.
2013-02-19base: Fix a bug in the address interleavingAndreas Hansson
This patch fixes a minor (but important) typo in the matching of an address to an interleaved range.
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.
2013-02-10base: add some mathematical operators to Cycles classNilay Vaish
2013-01-07scons: Enforce gcc >= 4.4 or clang >= 2.9 and c++0x supportAndreas Hansson
This patch checks that the compiler in use is either gcc >= 4.4 or clang >= 2.9. and enables building with --std=c++0x in all cases. As a consequence, we can tidy up the hashmap and always have static_assert available. If anyone wants to use alternative compilers, icc for example supports c++0x to a similar level and could be added if needed. This patch opens up for a more elaborate use of c++0x features that are present in gcc 4.4 and clang 2.9, e.g. auto typed variables, variadic templates, rvalues and move semantics, and strongly typed enums. There will be no going back on this one...
2013-01-07scons: Remove stale compiler optionsAndreas Hansson
This patch simply prunes the SUNCC and ICC compiler options as they are both sufficiently stale that they would have to be re-written from scratch anyhow. The patch serves to clean things up before shifting to a build environment that enforces basic c++11 compliance as done in the following patch.
2013-01-07base: Add support for merging of interleaved address rangesAndreas Hansson
This patch adds support for merging a vector of interleaved address ranges into a contigous range. The functionality will be used in the interconnect and the PhysicalMemory to transform interleaved memory ranges to contigous ranges before passing them on. The actual use of the merging is appearing in future patches.
2013-01-07mem: Add interleaving bits to the address rangesAndreas Hansson
This patch adds support for interleaving bits for the address ranges. What was previously just a start and end address, now has an additional three fields, for the high bit, and number of bits to use for interleaving, and a match value to compare against. If the number of interleaving bits is set to zero it is effectively disabled. A number of convenience functions are added to the range to enquire about the interleaving, its granularity and the number of stripes it is part of.
2013-01-07base: Simplify the AddrRangeMap by removing unused codeAndreas Hansson
This patch cleans up the AddrRangeMap in preparation for the addition of interleaving by removing unused code. The non-const editions of find are never used, and hence the duplication is not needed.
2013-01-07base: Encapsulate the underlying fields in AddrRangeAndreas Hansson
This patch makes the start and end address private in a move to prevent direct manipulation and matching of ranges based on these fields. This is done so that a transition to ranges with interleaving support is possible. As a result of hiding the start and end, a number of member functions are needed to perform the comparisons and manipulations that previously took place directly on the members. An accessor function is provided for the start address, and a function is added to test if an address is within a range. As a result of the latter the != and == operator is also removed in favour of the member function. A member function that returns a string representation is also created to allow debug printing. In general, this patch does not add any functionality, but it does take us closer to a situation where interleaving (and more cleverness) can be added under the bonnet without exposing it to the user. More on that in a later patch.
2013-01-07mem: Add tracing support in the communication monitorAndreas Hansson
This patch adds packet tracing to the communication monitor using a protobuf as the mechanism for creating the trace. If no file is specified, then the tracing is disabled. If a file is specified, then for every packet that is successfully sent, a protobuf message is serialized to the file.
2012-11-16sim: have a curTick per eventqNilay Vaish
This patch adds a _curTick variable to an eventq. This variable is updated whenever an event is serviced in function serviceOne(), or all events upto a particular time are processed in function serviceEvents(). This change helps when there are eventqs that do not make use of curTick for scheduling events.
2012-11-02sim: Include object header files in SWIG interfacesAndreas 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.
2012-11-02base: Add missing header file to addr_range.hh.Andreas Sandberg
2012-11-02base: Fix a few incorrectly handled print format casesChander Sudanthi
This patch ensures cases like %0.6u, %06f, and %.6u are processed correctly. The case like %06f is ambiguous and was made to match printf. Also, this patch removes the goto statement in cprintf.cc in favor of a function call.
2012-11-02base: split out the VncServer into a VncInput and Server classesChander Sudanthi
This patch adds a VncInput base class which VncServer inherits from. Another class can implement the same interface and be used instead of the VncServer, for example a class that replays Vnc traffic. --HG-- rename : src/base/vnc/VncServer.py => src/base/vnc/Vnc.py rename : src/base/vnc/vncserver.cc => src/base/vnc/vncinput.cc rename : src/base/vnc/vncserver.hh => src/base/vnc/vncinput.hh
2012-10-15Mem: Use range operations in bus in preparation for stripingAndreas Hansson
This patch transitions the bus to use the AddrRange operations instead of directly accessing the start and end. The change facilitates the move to a more elaborate AddrRange class that also supports address striping in the bus by specifying interleaving bits in the ranges. Two new functions are added to the AddrRange to determine if two ranges intersect, and if one is a subset of another. The bus propagation of address ranges is also tweaked such that an update is only propagated if the bus received information from all the downstream slave modules. This avoids the iteration and need for the cycle-breaking scheme that was previously used.
2012-09-25ARM: added support for flattened device tree blobsDam Sunwoo
Newer Linux kernels require DTB (device tree blobs) to specify platform configurations. The input DTB filename can be specified through gem5 parameters in LinuxArmSystem.
2012-09-25base: Check for static_assert support and provide fallbackAndreas Sandberg
C++11 has support for static_asserts to provide compile-time assertion checking. This is very useful when testing, for example, structure sizes to make sure that the compiler got the right alignment or vector sizes.
2012-09-19AddrRange: Transition from Range<T> to AddrRangeAndreas Hansson
This patch takes the final plunge and transitions from the templated Range class to the more specific AddrRange. In doing so it changes the obvious Range<Addr> to AddrRange, and also bumps the range_map to be AddrRangeMap. In addition to the obvious changes, including the removal of redundant includes, this patch also does some house keeping in preparing for the introduction of address interleaving support in the ranges. The Range class is also stripped of all the functionality that is never used. --HG-- rename : src/base/range.hh => src/base/addr_range.hh rename : src/base/range_map.hh => src/base/addr_range_map.hh
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.
2012-09-19AddrRange: Remove unused range_multimapAndreas Hansson
This patch simply removes the unused range_multimap in preparation for a more specific AddrRangeMap that also allows interleaving in addition to pure ranges.
2012-09-14scons: Use c++0x with gcc >= 4.4 instead of 4.6Andreas Hansson
This patch shifts the version of gcc for which we enable c++0x from 4.6 to 4.4 The more long term plan is to see what the c++0x features can bring and what level of support would be enabled simply by bumping the required version of gcc from 4.3 to 4.4. A few minor things had to be fixed in the code base, most notably the choice of a hashmap implementation. In the Ruby Sequencer there were also a few minor issues that gcc 4.4 was not too happy about.
2012-09-10NetBSD: Build on NetBSDPalle Lyckegaard
Minor patch against so building on NetBSD is possible.
2012-09-10AddrRange: Remove the unused range_ops headerAndreas Hansson
This patch prunes the range_ops header that is no longer used. The bridge used it to do filtering of address ranges, but this is changed since quite some time. Ultimately this patch aims to simplify the handling of ranges before specialising the AddrRange to an AddrRegion that also allows striping bits to be selected.
2012-09-10Inet: Remove the SackRange and its useAndreas Hansson
This patch aims to simplify the use of the Range class before introducing a more elaborate AddrRegion to replace the AddrRange. The SackRange is the only use of the range class besides address ranges, and the removal of this use makes for an easier modification of the range class. The functionlity that is removed with this patch is not used anywhere throughout the code base.
2012-09-07loader: initialize all memory in the ObjectFile objects.Ali Saidi
Some bare metal build flows seem to build binaries that we aren't necessarily expecting. Initialize everything to 0, so we don't make any assumptions about what is or isn't in the binary.
2012-09-07Param: Transition to Cycles for relevant parametersAndreas Hansson
This patch is a first step to using Cycles as a parameter type. The main affected modules are the CPUs and the Ruby caches. There are definitely plenty more places that are affected, but this patch serves as a starting point to making the transition. An important part of this patch is to actually enable parameters to be specified as Param.Cycles which involves some changes to params.py.
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.
2012-08-21Clock: Make Tick unsigned and remove UTickAndreas Hansson
This patch makes the Tick unsigned and removes the UTick typedef. The ticks should never be negative, and there was only one major issue with removing it, caused by the o3 CPU using a -1 as an initial value. The patch has no impact on any regressions.
2012-08-06str: add an overloaded startswith() utility methodSteve Reinhardt
for various string types and use it in a few places.
2012-07-09Bus: Replace tickNextIdle and inRetry with a state variableAndreas Hansson
This patch adds a state enum and member variable in the bus, tracking the bus state, thus eliminating the need for tickNextIdle and inRetry, and fixing an issue that allowed the bus to be occupied by multiple packets at once (hopefully it also makes it easier to understand the code). The bus, in its current form, uses tickNextIdle and inRetry to keep track of the state of the bus. However, it only updates tickNextIdle _after_ forwarding a packet using sendTiming, and the result is that the bus is still seen as idle, and a module that receives the packet and starts transmitting new packets in zero time will still see the bus as idle (and this is done by a number of DMA devices). The issue can also be seen in isOccupied where the bus calls reschedule on an event instead of schedule. This patch addresses the problem by marking the bus as _not_ idle already by the time we conclude that the bus is not occupied and we will deal with the packet. As a result of not allowing multiple packets to occupy the bus, some regressions have slight changes in their statistics. A separate patch updates these accordingly. Further ahead, a follow-on patch will introduce a separate state variable for request/responses/snoop responses, and thus implement a split request/response bus with separate flow control for the different message types (even further ahead it will introduce a multi-layer bus).
2012-07-09Fix: Address a few benign memory leaksAndreas Hansson
This patch is the result of static analysis identifying a number of memory leaks. The leaks are all benign as they are a result of not deallocating memory in the desctructor. The fix still has value as it removes false positives in the static analysis.
2012-06-05stats: when applying an operation to two vectors sum the components first.William Wang
Previously writing X/Y in a formula would result in: x[0]/y[0] + x[1]/y[1] In reality you want: (x[0] +x[1])/(y[0] + y[1])
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.
2012-06-05stats: Provide a mechanism to get a callback when stats are dumped.Mitchell Hayenga
This mechanism is useful for dumping output that is correlated with stats dumping, but isn't tracked by the gem5 statistics.
2012-05-30Packet: Unify the use of PortID in packet and portAndreas Hansson
This patch removes the Packet::NodeID typedef and unifies it with the Port::PortId. The src and dest fields in the packet are used to hold a port id (e.g. in the bus), and thus the two should actually be the same. The typedef PortID is now global (in base/types.hh) and aligned with the ThreadID in terms of capitalisation and naming of the InvalidPortID constant. Before this patch, two flags were used for valid destination and source, rather than relying on a named value (InvalidPortID), and this is now redundant, as the src and dest field themselves are sufficient to tell whether the current value is a valid port identifier or not. Consequently, the VALID_SRC and VALID_DST are removed. As part of the cleaning up, a number of int parameters and local variables are updated to use PortID. Note that Ruby still has its own NodeID typedef. Furthermore, the MemObject getMaster/SlavePort still has an int idx parameter with a default value of -1 which should eventually change to PortID idx = InvalidPortID.
2012-05-10stats: fix bug in assert for 2d vectorAli Saidi
2012-05-10base: fix a invalid ?: operatorAli Saidi
2012-05-10stats: track if the stats have been enabled and prevent requesting master idAli Saidi
Track the point in the initialization where statistics have been registered. After this point registering new masterIds can no longer work as some SimObjects may have sized stats vectors based on the previous value. If someone tries to register a masterId after this point the simulator executes fatal().
2012-05-09stats: use nan instead of no_valueNathan Binkert
2012-04-25clang/gcc: Use STL hash function for int64_t and uint64_tAndreas Hansson
This patch changes the guards for the definition of hash functions to also exclude the int64_t and uint64_t hash functions in the case we are using the c++0x STL <unordered_map> (and <hash>) or the TR1 version of the same header. Previously the guard only covered the hash function for strings, but it seems there is also no need to define a hash for the 64-bit integer types, and this has caused problems with builds on 32-bit Ubuntu.
2012-04-22base: Include cassert in trie.hh.Gabe Black
trie.hh uses assert, but it wasn't explicitly including cassert.
2012-04-14sim: Update some comments in trie.hh that were meant to go in the last change.Gabe Black
2012-04-14sim: A trie data structure specifically to speed up paging lookups.Gabe Black
This change adds a trie data structure which stores an arbitrary pointer type based on an address and a number of relevant bits. Then lookups can be done against the trie where the tree is traversed and the first legitimate match found is returned.