src/arch/generic/mmu.cc

/*
 * Copyright (c) 2011-2012,2016-2017, 2019-2020 ARM Limited
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 * Copyright (c) 2002-2005 The Regents of The University of Michigan
 * Copyright (c) 2011 Regents of the University of California
 * Copyright (c) 2013 Advanced Micro Devices, Inc.
 * Copyright (c) 2013 Mark D. Hill and David A. Wood
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "arch/generic/mmu.hh"

void
BaseMMU::takeOverFrom(BaseMMU *old_mmu)
{
    Port *old_itb_port = old_mmu->itb->getTableWalkerPort();
    Port *old_dtb_port = old_mmu->dtb->getTableWalkerPort();
    Port *new_itb_port = itb->getTableWalkerPort();
    Port *new_dtb_port = dtb->getTableWalkerPort();

    // Move over any table walker ports if they exist
    if (new_itb_port)
        new_itb_port->takeOverFrom(old_itb_port);
    if (new_dtb_port)
        new_dtb_port->takeOverFrom(old_dtb_port);

    itb->takeOverFrom(old_mmu->itb);
    dtb->takeOverFrom(old_mmu->dtb);
}