mmu.cc

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#include "arch/arm/mmu.hh"
#include "arch/arm/table_walker.hh"
#include "arch/arm/tlbi_op.hh"
 
namespace gem5
{
 
using namespace ArmISA;
 
MMU::MMU(const ArmMMUParams &p)
  : BaseMMU(p),
    itbStage2(p.stage2_itb), dtbStage2(p.stage2_dtb),
    iport(p.itb_walker, p.sys->getRequestorId(p.itb_walker)),
    dport(p.dtb_walker, p.sys->getRequestorId(p.dtb_walker)),
    itbWalker(p.itb_walker), dtbWalker(p.dtb_walker),
    itbStage2Walker(p.stage2_itb_walker),
    dtbStage2Walker(p.stage2_dtb_walker)
{
    itbWalker->setPort(&iport);
    dtbWalker->setPort(&dport);
    itbStage2Walker->setPort(&iport);
    dtbStage2Walker->setPort(&dport);
}
 
void
MMU::init()
{
    itbWalker->setMmu(this);
    dtbWalker->setMmu(this);
    itbStage2Walker->setMmu(this);
    dtbStage2Walker->setMmu(this);
 
    itbStage2->setTableWalker(itbStage2Walker);
    dtbStage2->setTableWalker(dtbStage2Walker);
 
    getITBPtr()->setStage2Tlb(itbStage2);
    getITBPtr()->setTableWalker(itbWalker);
    getDTBPtr()->setStage2Tlb(dtbStage2);
    getDTBPtr()->setTableWalker(dtbWalker);
}
 
TLB *
MMU::getTlb(BaseMMU::Mode mode, bool stage2) const
{
    if (mode == BaseMMU::Execute) {
        if (stage2)
            return itbStage2;
        else
            return getITBPtr();
    } else {
        if (stage2)
            return dtbStage2;
        else
            return getDTBPtr();
    }
}
 
bool
MMU::translateFunctional(ThreadContext *tc, Addr vaddr, Addr &paddr)
{
    return getDTBPtr()->translateFunctional(tc, vaddr, paddr);
}
 
Fault
MMU::translateFunctional(const RequestPtr &req, ThreadContext *tc,
    BaseMMU::Mode mode, TLB::ArmTranslationType tran_type)
{
    return translateFunctional(req, tc, mode, tran_type, false);
}
 
Fault
MMU::translateFunctional(const RequestPtr &req, ThreadContext *tc,
    BaseMMU::Mode mode, TLB::ArmTranslationType tran_type,
    bool stage2)
{
    return getTlb(mode, stage2)->translateFunctional(
        req, tc, mode, tran_type);
}
 
Fault
MMU::translateAtomic(const RequestPtr &req, ThreadContext *tc,
    BaseMMU::Mode mode, bool stage2)
{
    return getTlb(mode, stage2)->translateAtomic(req, tc, mode);
}
 
void
MMU::translateTiming(const RequestPtr &req, ThreadContext *tc,
    BaseMMU::Translation *translation, BaseMMU::Mode mode, bool stage2)
{
    return getTlb(mode, stage2)->translateTiming(req, tc, translation, mode);
}
 
void
MMU::invalidateMiscReg(TLBType type)
{
    if (type & TLBType::I_TLBS) {
        getITBPtr()->invalidateMiscReg();
    }
    if (type & TLBType::D_TLBS) {
        getDTBPtr()->invalidateMiscReg();
    }
}
 
} // namespace gem5