aacb676220
This change also adjusts the TlbEntry class so that it stores the number of address bits wide a page is rather than its size in bytes. In other words, instead of storing 4K for a 4K page, it stores 12. 12 is easy to turn into 4K, but it's a little harder going the other way.
75 lines
3 KiB
C++
75 lines
3 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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#include <string>
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#include "arch/x86/pagetable_walker.hh"
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#include "arch/x86/tlb.hh"
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#include "arch/x86/vtophys.hh"
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#include "base/trace.hh"
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#include "cpu/thread_context.hh"
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#include "debug/VtoPhys.hh"
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#include "sim/fault_fwd.hh"
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using namespace std;
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namespace X86ISA
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{
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Addr
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vtophys(Addr vaddr)
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{
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panic("Need access to page tables\n");
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}
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Addr
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vtophys(ThreadContext *tc, Addr vaddr)
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{
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Walker *walker = tc->getDTBPtr()->getWalker();
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unsigned logBytes;
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Addr addr = vaddr;
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Fault fault = walker->startFunctional(
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tc, addr, logBytes, BaseTLB::Read);
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if (fault != NoFault)
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panic("vtophys page walk returned fault\n");
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Addr masked_addr = vaddr & mask(logBytes);
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Addr paddr = addr | masked_addr;
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DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
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return paddr;
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}
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}
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