stage2_lookup.hh

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/*
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 * to a hardware implementation of the functionality of the software
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 * met: redistributions of source code must retain the above copyright
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 * this software without specific prior written permission.
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * Authors: Ali Saidi
 *          Giacomo Gabrielli
 */

#ifndef __ARCH_ARM_STAGE2_LOOKUP_HH__
#define __ARCH_ARM_STAGE2_LOOKUP_HH__

#include <list>

#include "arch/arm/system.hh"
#include "arch/arm/table_walker.hh"
#include "arch/arm/tlb.hh"
#include "mem/request.hh"

class ThreadContext;

namespace ArmISA {
class Translation;
class TLB;


class Stage2LookUp : public BaseTLB::Translation
{
  private:
    TLB                     *stage1Tlb;
    TLB               *stage2Tlb;
    TlbEntry                stage1Te;
    RequestPtr              s1Req;
    TLB::Translation        *transState;
    BaseTLB::Mode           mode;
    bool                    timing;
    bool                    functional;
    TLB::ArmTranslationType tranType;
    TlbEntry                *stage2Te;
    Request                 req;
    Fault                   fault;
    bool                    complete;
    bool                    selfDelete;

  public:
    Stage2LookUp(TLB *s1Tlb, TLB *s2Tlb, TlbEntry s1Te, RequestPtr _req,
        TLB::Translation *_transState, BaseTLB::Mode _mode, bool _timing,
        bool _functional, TLB::ArmTranslationType _tranType) :
        stage1Tlb(s1Tlb), stage2Tlb(s2Tlb), stage1Te(s1Te), s1Req(_req),
        transState(_transState), mode(_mode), timing(_timing),
        functional(_functional), tranType(_tranType), stage2Te(nullptr),
        fault(NoFault), complete(false), selfDelete(false)
    {
        req.setVirt(0, s1Te.pAddr(s1Req->getVaddr()), s1Req->getSize(),
                    s1Req->getFlags(), s1Req->masterId(), 0);
    }

    Fault getTe(ThreadContext *tc, TlbEntry *destTe);

    void mergeTe(RequestPtr req, BaseTLB::Mode mode);

    void setSelfDelete() { selfDelete = true; }

    bool isComplete() const { return complete; }

    void markDelayed() {}

    void finish(const Fault &fault, RequestPtr req, ThreadContext *tc,
                BaseTLB::Mode mode);
};


} // namespace ArmISA

#endif //__ARCH_ARM_STAGE2_LOOKUP_HH__