182 lines
7.4 KiB
C++
182 lines
7.4 KiB
C++
/*
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* Copyright (c) 2003-2007 The Regents of The University of Michigan
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* All rights reserved.
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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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/*
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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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* Redistribution and use of this software in source and binary forms,
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* with or without modification, are permitted provided that the
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* following conditions are met:
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*
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* The software must be used only for Non-Commercial Use which means any
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* use which is NOT directed to receiving any direct monetary
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* compensation for, or commercial advantage from such use. Illustrative
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* examples of non-commercial use are academic research, personal study,
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* teaching, education and corporate research & development.
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* Illustrative examples of commercial use are distributing products for
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* commercial advantage and providing services using the software for
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* commercial advantage.
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*
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* If you wish to use this software or functionality therein that may be
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* covered by patents for commercial use, please contact:
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* Director of Intellectual Property Licensing
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* Office of Strategy and Technology
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* Hewlett-Packard Company
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* 1501 Page Mill Road
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* Palo Alto, California 94304
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer. Redistributions
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* in binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution. Neither the name of
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* the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, 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. No right of
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* sublicense is granted herewith. Derivatives of the software and
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* output created using the software may be prepared, but only for
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* Non-Commercial Uses. Derivatives of the software may be shared with
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* others provided: (i) the others agree to abide by the list of
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* conditions herein which includes the Non-Commercial Use restrictions;
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* and (ii) such Derivatives of the software include the above copyright
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* notice to acknowledge the contribution from this software where
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* applicable, this list of conditions and the disclaimer below.
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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 "arch/x86/decoder.hh"
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#include "arch/x86/faults.hh"
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#include "base/trace.hh"
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#include "config/full_system.hh"
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#include "cpu/thread_context.hh"
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#if !FULL_SYSTEM
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#include "arch/x86/isa_traits.hh"
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#include "mem/page_table.hh"
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#include "sim/process.hh"
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#else
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#include "arch/x86/tlb.hh"
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#endif
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namespace X86ISA
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{
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#if FULL_SYSTEM
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void X86Trap::invoke(ThreadContext * tc)
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{
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panic("X86 faults are not implemented!");
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}
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void X86Abort::invoke(ThreadContext * tc)
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{
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panic("X86 faults are not implemented!");
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}
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void X86Interrupt::invoke(ThreadContext * tc)
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{
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using namespace X86ISAInst::RomLabels;
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HandyM5Reg m5reg = tc->readMiscRegNoEffect(MISCREG_M5_REG);
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MicroPC entry;
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if (m5reg.mode == LongMode) {
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entry = extern_label_longModeInterrupt;
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} else {
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entry = extern_label_legacyModeInterrupt;
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}
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tc->setIntReg(INTREG_MICRO(1), vector);
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tc->setIntReg(INTREG_MICRO(7), tc->readPC());
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tc->setMicroPC(romMicroPC(entry));
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tc->setNextMicroPC(romMicroPC(entry) + 1);
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}
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void FakeITLBFault::invoke(ThreadContext * tc)
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{
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// Start the page table walker.
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tc->getITBPtr()->walk(tc, vaddr);
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}
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void FakeDTLBFault::invoke(ThreadContext * tc)
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{
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// Start the page table walker.
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tc->getDTBPtr()->walk(tc, vaddr);
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}
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#else // !FULL_SYSTEM
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void FakeITLBFault::invoke(ThreadContext * tc)
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{
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DPRINTF(TLB, "Invoking an ITLB fault for address %#x at pc %#x.\n",
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vaddr, tc->readPC());
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Process *p = tc->getProcessPtr();
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TlbEntry entry;
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bool success = p->pTable->lookup(vaddr, entry);
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if(!success) {
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panic("Tried to execute unmapped address %#x.\n", vaddr);
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} else {
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Addr alignedVaddr = p->pTable->pageAlign(vaddr);
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DPRINTF(TLB, "Mapping %#x to %#x\n", alignedVaddr,
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entry.pageStart());
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tc->getITBPtr()->insert(alignedVaddr, entry);
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}
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}
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void FakeDTLBFault::invoke(ThreadContext * tc)
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{
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DPRINTF(TLB, "Invoking an DTLB fault for address %#x at pc %#x.\n",
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vaddr, tc->readPC());
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Process *p = tc->getProcessPtr();
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TlbEntry entry;
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bool success = p->pTable->lookup(vaddr, entry);
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if(!success) {
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p->checkAndAllocNextPage(vaddr);
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success = p->pTable->lookup(vaddr, entry);
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}
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if(!success) {
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panic("Tried to access unmapped address %#x.\n", vaddr);
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} else {
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Addr alignedVaddr = p->pTable->pageAlign(vaddr);
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DPRINTF(TLB, "Mapping %#x to %#x\n", alignedVaddr,
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entry.pageStart());
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tc->getDTBPtr()->insert(alignedVaddr, entry);
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}
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}
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#endif
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} // namespace X86ISA
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