76cd4393c0
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.
169 lines
5.5 KiB
C++
169 lines
5.5 KiB
C++
/*
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* Copyright (c) 2007 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#ifndef __ARCH_X86_TLB_HH__
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#define __ARCH_X86_TLB_HH__
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#include <list>
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#include <string>
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#include <vector>
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#include "arch/generic/tlb.hh"
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#include "arch/x86/regs/segment.hh"
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#include "arch/x86/pagetable.hh"
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#include "base/trie.hh"
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#include "mem/mem_object.hh"
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#include "mem/request.hh"
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#include "params/X86TLB.hh"
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#include "sim/sim_object.hh"
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class ThreadContext;
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class Packet;
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namespace X86ISA
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{
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class Walker;
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class TLB : public BaseTLB
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{
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protected:
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friend class Walker;
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typedef std::list<TlbEntry *> EntryList;
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uint32_t configAddress;
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public:
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typedef X86TLBParams Params;
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TLB(const Params *p);
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void takeOverFrom(BaseTLB *otlb) {}
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TlbEntry *lookup(Addr va, bool update_lru = true);
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void setConfigAddress(uint32_t addr);
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protected:
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EntryList::iterator lookupIt(Addr va, bool update_lru = true);
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Walker * walker;
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public:
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Walker *getWalker();
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void flushAll();
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void flushNonGlobal();
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void demapPage(Addr va, uint64_t asn);
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protected:
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uint32_t size;
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std::vector<TlbEntry> tlb;
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EntryList freeList;
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TlbEntryTrie trie;
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uint64_t lruSeq;
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Fault translateInt(RequestPtr req, ThreadContext *tc);
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Fault translate(RequestPtr req, ThreadContext *tc,
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Translation *translation, Mode mode,
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bool &delayedResponse, bool timing);
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public:
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void evictLRU();
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uint64_t
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nextSeq()
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{
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return ++lruSeq;
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}
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Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode);
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void translateTiming(RequestPtr req, ThreadContext *tc,
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Translation *translation, Mode mode);
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/** Stub function for compilation support of CheckerCPU. x86 ISA does
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* not support Checker model at the moment
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*/
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Fault translateFunctional(RequestPtr req, ThreadContext *tc, Mode mode);
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/**
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* Do post-translation physical address finalization.
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*
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* Some addresses, for example requests going to the APIC,
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* need post-translation updates. Such physical addresses are
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* remapped into a "magic" part of the physical address space
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* by this method.
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*
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* @param req Request to updated in-place.
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* @param tc Thread context that created the request.
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* @param mode Request type (read/write/execute).
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* @return A fault on failure, NoFault otherwise.
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*/
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Fault finalizePhysical(RequestPtr req, ThreadContext *tc,
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Mode mode) const;
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TlbEntry * insert(Addr vpn, TlbEntry &entry);
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// Checkpointing
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void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
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void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
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/**
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* Get the table walker master port. This is used for
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* migrating port connections during a CPU takeOverFrom()
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* call. For architectures that do not have a table walker,
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* NULL is returned, hence the use of a pointer rather than a
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* reference. For X86 this method will always return a valid
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* port pointer.
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*
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* @return A pointer to the walker master port
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*/
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virtual BaseMasterPort *getMasterPort();
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};
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}
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#endif // __ARCH_X86_TLB_HH__
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