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2012-06-05ISA: Back-out NoopMachInst as a StaticInstPtr change.Ali Saidi
2012-06-05O3: 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.
2012-06-04ISA: Turn the ExtMachInst NoopMachinst into the StaticInstPtr NoopStaticInst.Gabe Black
This eliminates a use of the ExtMachInst type outside of the ISAs.
2012-05-26ISA,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
2012-05-26CPU: 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
2012-05-25ISA: Make the decode function part of the ISA's decoder.Gabe Black
2012-05-25Decode: 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
2012-04-23ISA: Put parser generated files in a "generated" directory.Gabe Black
This is to avoid collision with non-generated files.
2012-04-14clang/gcc: Fix compilation issues with clang 3.0 and gcc 4.6Andreas 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".
2012-04-06MEM: Enable multiple distributed generalized memoriesAndreas Hansson
This patch removes the assumption on having on single instance of PhysicalMemory, and enables a distributed memory where the individual memories in the system are each responsible for a single contiguous address range. All memories inherit from an AbstractMemory that encompasses the basic behaviuor of a random access memory, and provides untimed access methods. What was previously called PhysicalMemory is now SimpleMemory, and a subclass of AbstractMemory. All future types of memory controllers should inherit from AbstractMemory. To enable e.g. the atomic CPU and RubyPort to access the now distributed memory, the system has a wrapper class, called PhysicalMemory that is aware of all the memories in the system and their associated address ranges. This class thus acts as an infinitely-fast bus and performs address decoding for these "shortcut" accesses. Each memory can specify that it should not be part of the global address map (used e.g. by the functional memories by some testers). Moreover, each memory can be configured to be reported to the OS configuration table, useful for populating ATAG structures, and any potential ACPI tables. Checkpointing support currently assumes that all memories have the same size and organisation when creating and resuming from the checkpoint. A future patch will enable a more flexible re-organisation. --HG-- rename : src/mem/PhysicalMemory.py => src/mem/AbstractMemory.py rename : src/mem/PhysicalMemory.py => src/mem/SimpleMemory.py rename : src/mem/physical.cc => src/mem/abstract_mem.cc rename : src/mem/physical.hh => src/mem/abstract_mem.hh rename : src/mem/physical.cc => src/mem/simple_mem.cc rename : src/mem/physical.hh => src/mem/simple_mem.hh
2012-03-19clang: Fix recently introduced clang compilation errorsAndreas Hansson
This patch makes the code compile with clang 2.9 and 3.0 again by making two very minor changes. Firt, it maintains a strict typing in the forward declaration of the BaseCPUParams. Second, it adds a FullSystemInt flag of the type unsigned int next to the boolean FullSystem flag. The FullSystemInt variable can be used in decode-statements (expands to switch statements) in the instruction decoder.
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.
2012-02-24MEM: Make port proxies use references rather than pointersAndreas 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.
2012-01-31Merge with head, hopefully the last time for this batch.Gabe Black
2012-01-31clang: Enable compiling gem5 using clang 2.9 and 3.0Koan-Sin Tan
This patch adds the necessary flags to the SConstruct and SConscript files for compiling using clang 2.9 and later (on Ubuntu et al and OSX XCode 4.2), and also cleans up a bunch of compiler warnings found by clang. Most of the warnings are related to hidden virtual functions, comparisons with unsigneds >= 0, and if-statements with empty bodies. A number of mismatches between struct and class are also fixed. clang 2.8 is not working as it has problems with class names that occur in multiple namespaces (e.g. Statistics in kernel_stats.hh). clang has a bug (http://llvm.org/bugs/show_bug.cgi?id=7247) which causes confusion between the container std::set and the function Packet::set, and this is currently addressed by not including the entire namespace std, but rather selecting e.g. "using std::vector" in the appropriate places.
2012-01-30Merge with main repository.Gabe Black
2012-01-30MEM: Clean-up of Functional/Virtual/TranslatingPort remnantsAndreas 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.
2012-01-29Implement Ali's review feedback.Gabe Black
Try to decrease indentation, and remove some redundant FullSystem checks.
2012-01-28MIPS: Fix a compiler warning from the eret instruction.Gabe Black
2012-01-28Merge 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
2012-01-16Merge yet again with the main repository.Gabe Black
2012-01-17MEM: Add port proxies instead of non-structural portsAndreas 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
2012-01-12mips: compatibility between MIPS_SE and cross compiler from CodeSorceryDeyuan Guo
2012-01-12mips: Fix bugs in faults.cc/hh and tlb.cc for MIPS_FSDeyuan Guo
2012-01-12mips: Fix decoder of two float-convert instructionsDeyuan Guo
2012-01-12mips: definition of MIPS64_QNAN in registers.hhDeyuan Guo
2012-01-07Merge with main repository.Gabe Black
2011-11-18SE/FS: Get rid of includes of config/full_system.hh.Gabe Black
2011-10-31GCC: Get everything working with gcc 4.6.1.Gabe Black
And by "everything" I mean all the quick regressions.
2011-10-30SE/FS: Get rid of FULL_SYSTEM in MIPS.Gabe Black
2011-10-30System: Push boot_cpu_frequency down into the subclasses that actually use it.Gabe Black
This parameter depends on a number of coincidences to work properly. First, there must be an array assigned to system called "cpu" even though there's no parameter called that. Second, the items in the "cpu" array have to have a "clock" parameter which has a "frequency" member. This is true of the normal CPUs, but isn't true of the memory tester CPUs. This happened to work before because the memory tester CPUs were only used in SE mode where this parameter was being excluded. Since everything is being pulled into a common binary, this won't work any more. Since the boot_cpu_frequency parameter is only used by Alpha's Linux System object (and Mips's through copy and paste), the definition of that parameter is moved down to those objects specifically.
2011-10-30SE/FS: Make getProcessPtr available in both modes, and get rid of FULL_SYSTEMs.Gabe Black
2011-10-22SE: move page allocation from PageTable to ProcessSteve 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.
2011-10-22syscall_emul: implement MAP_FIXED option to mmap()Steve Reinhardt
2011-10-16SE/FS: Turn on the page table class in FS.Gabe Black
2011-10-16MIPS: Build vtophys in SE mode.Gabe Black
2011-10-09SE/FS: Build the Interrupt objects in SE mode.Gabe Black
2011-09-30SE/FS: Remove System::platform and Platform::intrFrequency.Gabe Black
In order for a system object to work in SE mode and FS mode, it has to either always require a platform object even in SE mode, or get rid of the requirement all together. Making SE mode carry around unnecessary/unused bits of FS seems less than ideal, so I decided to go with the second option. The platform pointer in the System class was used for exactly one purpose, a path for the Alpha Linux system object to get to the real time clock and read its frequency so that it could short cut the loops_per_jiffy calculation. There was also a copy and pasted implementation in MIPS, but since it was only there because it was there in Alpha I still count that as one use. This change reverses the mechanism that communicates the RTC frequency so that the Tsunami platform object pushes it up to the AlphaSystem object. This is slightly less specific than it could be because really only the AlphaLinuxSystem uses it. Because the intrFrequency function on the Platform class was no longer necessary (and unimplemented on anything but Alpha) it was eliminated. After this change, a platform will need to have a system, but a system won't have to have a platform.
2011-09-30SE/FS: Use the new FullSystem constant where possible.Gabe Black
2011-09-27Faults: Replace calls to genMachineCheckFault with M5PanicFault.Gabe Black
2011-09-26ISA 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.
2011-09-19MIPS: Final overhaul of MIPS faults to kill #if FULL_SYSTEMGabe Black
This change is a significant reorganization of the MIPS fault code that gets rid of duplication, fixes some bugs, doubtlessly introduces others, and adds names for the exception code constants.
2011-09-19MIPS, faults: Update how the PC is set.Gabe Black
2011-09-19MIPS: Get rid of skipFaultInstruction and setRestartAddress.Gabe Black
Neither of these functions were used.
2011-09-19MIPS: Use inheritance to consolidate class definitions.Gabe Black
2011-09-19MIPS: Always compile in setExceptionState, including in SE mode.Gabe Black
Also fix the newly exposed and preexisting compile errors. This code hasn't been exposed in a while, and it's not up to date with the rest of gem5.
2011-09-19MIPS: Consolidate TLB related faults.Gabe Black
Pass in a bool to indicate if the fault is from a store instead of having two different classes. The classes were also misleadingly named since loads are also processed by the DTB but should return ITB faults since they aren't stores. The TLB may be returning the wrong fault in this case, but I haven't looked at it closely.
2011-09-19MIPS: Get rid of the unused "count" field in FaultVals.Gabe Black
2011-09-19MIPS: Move the genMachineCheckFault function near MachineCheckFault.Gabe Black
Since they're so closely linked, they should be next to each other in the file.
2011-09-19MIPS: Consolidate the two AddressErrorFault variants.Gabe Black