| /* |
| * Copyright (c) 2011 ARM Limited |
| * All rights reserved. |
| * |
| * The license below extends only to copyright in the software and shall |
| * not be construed as granting a license to any other intellectual |
| * property including but not limited to intellectual property relating |
| * to a hardware implementation of the functionality of the software |
| * licensed hereunder. You may use the software subject to the license |
| * terms below provided that you ensure that this notice is replicated |
| * unmodified and in its entirety in all distributions of the software, |
| * modified or unmodified, in source code or in binary form. |
| * |
| * Copyright (c) 2006 The Regents of The University of Michigan |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * 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; |
| * redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution; |
| * neither the name of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef __ARCH_GENERIC_TLB_HH__ |
| #define __ARCH_GENERIC_TLB_HH__ |
| |
| #include "arch/generic/mmu.hh" |
| #include "base/logging.hh" |
| #include "mem/request.hh" |
| #include "sim/sim_object.hh" |
| |
| namespace gem5 |
| { |
| |
| class ThreadContext; |
| |
| class BaseTLB : public SimObject |
| { |
| protected: |
| BaseTLB(const Params &p) : SimObject(p) {} |
| |
| public: |
| virtual void demapPage(Addr vaddr, uint64_t asn) = 0; |
| |
| virtual Fault translateAtomic( |
| const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode) = 0; |
| virtual void translateTiming( |
| const RequestPtr &req, ThreadContext *tc, |
| BaseMMU::Translation *translation, BaseMMU::Mode mode) = 0; |
| virtual Fault |
| translateFunctional(const RequestPtr &req, ThreadContext *tc, |
| BaseMMU::Mode mode) |
| { |
| panic("Not implemented.\n"); |
| } |
| |
| /** |
| * Do post-translation physical address finalization. |
| * |
| * This method is used by some architectures that need |
| * post-translation massaging of physical addresses. For example, |
| * X86 uses this to remap physical addresses in the APIC range to |
| * a range of physical memory not normally available to real x86 |
| * implementations. |
| * |
| * @param req Request to updated in-place. |
| * @param tc Thread context that created the request. |
| * @param mode Request type (read/write/execute). |
| * @return A fault on failure, NoFault otherwise. |
| */ |
| virtual Fault finalizePhysical( |
| const RequestPtr &req, ThreadContext *tc, |
| BaseMMU::Mode mode) const = 0; |
| |
| /** |
| * Remove all entries from the TLB |
| */ |
| virtual void flushAll() = 0; |
| |
| /** |
| * Take over from an old tlb context |
| */ |
| virtual void takeOverFrom(BaseTLB *otlb) = 0; |
| |
| /** |
| * Get the table walker port if present. This is used for |
| * migrating port connections during a CPU takeOverFrom() |
| * call. For architectures that do not have a table walker, NULL |
| * is returned, hence the use of a pointer rather than a |
| * reference. |
| * |
| * @return A pointer to the walker port or NULL if not present |
| */ |
| virtual Port* getTableWalkerPort() { return NULL; } |
| |
| void memInvalidate() { flushAll(); } |
| }; |
| |
| } // namespace gem5 |
| |
| #endif // __ARCH_GENERIC_TLB_HH__ |