Address.cc revision 8091
1/* 2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include "mem/ruby/common/Address.hh" 30#include "mem/ruby/system/System.hh" 31 32physical_address_t 33Address::getLineAddress() const 34{ 35 return bitSelect(RubySystem::getBlockSizeBits(), ADDRESS_WIDTH); 36} 37 38physical_address_t 39Address::getOffset() const 40{ 41 return bitSelect(0, RubySystem::getBlockSizeBits() - 1); 42} 43 44void 45Address::makeLineAddress() 46{ 47 m_address = maskLowOrderBits(RubySystem::getBlockSizeBits()); 48} 49 50// returns the next stride address based on line address 51void 52Address::makeNextStrideAddress(int stride) 53{ 54 m_address = maskLowOrderBits(RubySystem::getBlockSizeBits()) 55 + RubySystem::getBlockSizeBytes()*stride; 56} 57 58integer_t 59Address::memoryModuleIndex() const 60{ 61 integer_t index = 62 bitSelect(RubySystem::getBlockSizeBits() + 63 RubySystem::getMemorySizeBits(), ADDRESS_WIDTH); 64 assert (index >= 0); 65 return index; 66 67 // Index indexHighPortion = 68 // address.bitSelect(MEMORY_SIZE_BITS - 1, 69 // PAGE_SIZE_BITS + NUMBER_OF_MEMORY_MODULE_BITS); 70 // Index indexLowPortion = 71 // address.bitSelect(DATA_BLOCK_BITS, PAGE_SIZE_BITS - 1); 72 // 73 // Index index = indexLowPortion | 74 // (indexHighPortion << (PAGE_SIZE_BITS - DATA_BLOCK_BITS)); 75 76 /* 77 Round-robin mapping of addresses, at page size granularity 78 79ADDRESS_WIDTH MEMORY_SIZE_BITS PAGE_SIZE_BITS DATA_BLOCK_BITS 80 | | | | 81 \ / \ / \ / \ / 0 82 ----------------------------------------------------------------------- 83 | unused |xxxxxxxxxxxxxxx| |xxxxxxxxxxxxxxx| | 84 | |xxxxxxxxxxxxxxx| |xxxxxxxxxxxxxxx| | 85 ----------------------------------------------------------------------- 86 indexHighPortion indexLowPortion 87 <-------> 88 NUMBER_OF_MEMORY_MODULE_BITS 89 */ 90} 91 92void 93Address::print(std::ostream& out) const 94{ 95 using namespace std; 96 out << "[" << hex << "0x" << m_address << "," << " line 0x" 97 << maskLowOrderBits(RubySystem::getBlockSizeBits()) << dec << "]" 98 << flush; 99} 100 101void 102Address::output(std::ostream& out) const 103{ 104 // Note: this outputs addresses in the form "ffff", not "0xffff". 105 // This code should always be able to write out addresses in a 106 // format that can be read in by the below input() method. Please 107 // don't change this without talking to Milo first. 108 out << std::hex << m_address << std::dec; 109} 110 111void 112Address::input(std::istream& in) 113{ 114 // Note: this only works with addresses in the form "ffff", not 115 // "0xffff". This code should always be able to read in addresses 116 // written out by the above output() method. Please don't change 117 // this without talking to Milo first. 118 in >> std::hex >> m_address >> std::dec; 119} 120 121Address::Address(const Address& obj) 122{ 123 m_address = obj.m_address; 124} 125 126Address& 127Address::operator=(const Address& obj) 128{ 129 if (this == &obj) { 130 // assert(false); 131 } else { 132 m_address = obj.m_address; 133 } 134 return *this; 135} 136 137