tlb.hh revision 8922
1/* 2 * Copyright (c) 2011 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2006 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Gabe Black 41 */ 42 43#ifndef __SIM_TLB_HH__ 44#define __SIM_TLB_HH__ 45 46#include "base/misc.hh" 47#include "mem/request.hh" 48#include "sim/fault_fwd.hh" 49#include "sim/sim_object.hh" 50 51class ThreadContext; 52class MasterPort; 53 54class BaseTLB : public SimObject 55{ 56 protected: 57 BaseTLB(const Params *p) 58 : SimObject(p) 59 {} 60 61 public: 62 enum Mode { Read, Write, Execute }; 63 64 public: 65 virtual void demapPage(Addr vaddr, uint64_t asn) = 0; 66 67 /** 68 * Get the table walker master port if present. This is used for 69 * migrating port connections during a CPU takeOverFrom() 70 * call. For architectures that do not have a table walker, NULL 71 * is returned, hence the use of a pointer rather than a 72 * reference. 73 * 74 * @return A pointer to the walker master port or NULL if not present 75 */ 76 virtual MasterPort* getMasterPort() { return NULL; } 77 78 class Translation 79 { 80 public: 81 virtual ~Translation() 82 {} 83 84 /** 85 * Signal that the translation has been delayed due to a hw page table 86 * walk. 87 */ 88 virtual void markDelayed() = 0; 89 90 /* 91 * The memory for this object may be dynamically allocated, and it may 92 * be responsible for cleaning itself up which will happen in this 93 * function. Once it's called, the object is no longer valid. 94 */ 95 virtual void finish(Fault fault, RequestPtr req, ThreadContext *tc, 96 Mode mode) = 0; 97 }; 98}; 99 100class GenericTLB : public BaseTLB 101{ 102 protected: 103 GenericTLB(const Params *p) 104 : BaseTLB(p) 105 {} 106 107 public: 108 void demapPage(Addr vaddr, uint64_t asn); 109 110 Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode); 111 void translateTiming(RequestPtr req, ThreadContext *tc, 112 Translation *translation, Mode mode); 113}; 114 115#endif // __ARCH_SPARC_TLB_HH__ 116