translation.hh revision 6973:a123bd350935
1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * Copyright (c) 2009 The University of Edinburgh 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer; 10 * redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution; 13 * neither the name of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * Authors: Gabe Black 30 * Timothy M. Jones 31 */ 32 33#ifndef __CPU_TRANSLATION_HH__ 34#define __CPU_TRANSLATION_HH__ 35 36#include "sim/tlb.hh" 37 38class WholeTranslationState 39{ 40 protected: 41 int outstanding; 42 Fault faults[2]; 43 44 public: 45 bool isSplit; 46 RequestPtr mainReq; 47 RequestPtr sreqLow; 48 RequestPtr sreqHigh; 49 uint8_t *data; 50 uint64_t *res; 51 BaseTLB::Mode mode; 52 53 /** Single translation state. */ 54 WholeTranslationState(RequestPtr _req, uint8_t *_data, uint64_t *_res, 55 BaseTLB::Mode _mode) 56 : outstanding(1), isSplit(false), mainReq(_req), sreqLow(NULL), 57 sreqHigh(NULL), data(_data), res(_res), mode(_mode) 58 { 59 faults[0] = faults[1] = NoFault; 60 assert(mode == BaseTLB::Read || mode == BaseTLB::Write); 61 } 62 63 /** Split translation state. */ 64 WholeTranslationState(RequestPtr _req, RequestPtr _sreqLow, 65 RequestPtr _sreqHigh, uint8_t *_data, uint64_t *_res, 66 BaseTLB::Mode _mode) 67 : outstanding(2), isSplit(true), mainReq(_req), sreqLow(_sreqLow), 68 sreqHigh(_sreqHigh), data(_data), res(_res), mode(_mode) 69 { 70 faults[0] = faults[1] = NoFault; 71 assert(mode == BaseTLB::Read || mode == BaseTLB::Write); 72 } 73 74 bool 75 finish(Fault fault, int index) 76 { 77 assert(outstanding); 78 faults[index] = fault; 79 outstanding--; 80 if (isSplit && outstanding == 0) { 81 82 // For ease later, we copy some state to the main request. 83 if (faults[0] == NoFault) { 84 mainReq->setPaddr(sreqLow->getPaddr()); 85 } 86 mainReq->setFlags(sreqLow->getFlags()); 87 mainReq->setFlags(sreqHigh->getFlags()); 88 } 89 return outstanding == 0; 90 } 91 92 Fault 93 getFault() const 94 { 95 if (!isSplit) 96 return faults[0]; 97 else if (faults[0] != NoFault) 98 return faults[0]; 99 else if (faults[1] != NoFault) 100 return faults[1]; 101 else 102 return NoFault; 103 } 104 105 void 106 setNoFault() 107 { 108 faults[0] = faults[1] = NoFault; 109 } 110 111 bool 112 isUncacheable() const 113 { 114 return mainReq->isUncacheable(); 115 } 116 117 bool 118 isPrefetch() const 119 { 120 return mainReq->isPrefetch(); 121 } 122 123 Addr 124 getPaddr() const 125 { 126 return mainReq->getPaddr(); 127 } 128 129 unsigned 130 getFlags() 131 { 132 return mainReq->getFlags(); 133 } 134 135 void 136 deleteReqs() 137 { 138 delete mainReq; 139 if (isSplit) { 140 delete sreqLow; 141 delete sreqHigh; 142 } 143 } 144}; 145 146template <class ExecContext> 147class DataTranslation : public BaseTLB::Translation 148{ 149 protected: 150 ExecContext *xc; 151 WholeTranslationState *state; 152 int index; 153 154 public: 155 DataTranslation(ExecContext *_xc, WholeTranslationState* _state) 156 : xc(_xc), state(_state), index(0) 157 { 158 } 159 160 DataTranslation(ExecContext *_xc, WholeTranslationState* _state, 161 int _index) 162 : xc(_xc), state(_state), index(_index) 163 { 164 } 165 166 void 167 finish(Fault fault, RequestPtr req, ThreadContext *tc, 168 BaseTLB::Mode mode) 169 { 170 assert(state); 171 assert(mode == state->mode); 172 if (state->finish(fault, index)) { 173 xc->finishTranslation(state); 174 } 175 delete this; 176 } 177}; 178 179#endif // __CPU_TRANSLATION_HH__ 180