Address.cc revision 10314:94b6b28fc968 
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 "arch/isa_traits.hh"
30#include "config/the_isa.hh"
31#include "mem/ruby/common/Address.hh"
32#include "mem/ruby/system/System.hh"
33
34physical_address_t
35Address::getLineAddress() const
36{
37    return bitSelect(RubySystem::getBlockSizeBits(), ADDRESS_WIDTH);
38}
39
40physical_address_t
41Address::getOffset() const
42{
43    return bitSelect(0, RubySystem::getBlockSizeBits() - 1);
44}
45
46void
47Address::makeLineAddress()
48{
49    m_address = maskLowOrderBits(RubySystem::getBlockSizeBits());
50}
51
52// returns the next stride address based on line address
53void
54Address::makeNextStrideAddress(int stride)
55{
56    m_address = maskLowOrderBits(RubySystem::getBlockSizeBits())
57        + RubySystem::getBlockSizeBytes()*stride;
58}
59
60int64
61Address::memoryModuleIndex() const
62{
63    int64 index =
64        bitSelect(RubySystem::getBlockSizeBits() +
65                  RubySystem::getMemorySizeBits(), ADDRESS_WIDTH);
66    assert (index >= 0);
67    return index;
68
69    // int64 indexHighPortion =
70    //     address.bitSelect(MEMORY_SIZE_BITS - 1,
71    //                       PAGE_SIZE_BITS + NUMBER_OF_MEMORY_MODULE_BITS);
72    // int64 indexLowPortion =
73    //     address.bitSelect(DATA_BLOCK_BITS, PAGE_SIZE_BITS - 1);
74    //
75    // int64 index = indexLowPortion |
76    //     (indexHighPortion << (PAGE_SIZE_BITS - DATA_BLOCK_BITS));
77
78    /*
79      Round-robin mapping of addresses, at page size granularity
80
81ADDRESS_WIDTH    MEMORY_SIZE_BITS        PAGE_SIZE_BITS  DATA_BLOCK_BITS
82  |                    |                       |               |
83 \ /                  \ /                     \ /             \ /       0
84  -----------------------------------------------------------------------
85  |       unused        |xxxxxxxxxxxxxxx|       |xxxxxxxxxxxxxxx|       |
86  |                     |xxxxxxxxxxxxxxx|       |xxxxxxxxxxxxxxx|       |
87  -----------------------------------------------------------------------
88                        indexHighPortion         indexLowPortion
89                                        <------->
90                               NUMBER_OF_MEMORY_MODULE_BITS
91    */
92}
93
94void
95Address::print(std::ostream& out) const
96{
97    using namespace std;
98    out << "[" << hex << "0x" << m_address << "," << " line 0x"
99        << maskLowOrderBits(RubySystem::getBlockSizeBits()) << dec << "]"
100        << flush;
101}
102
103void
104Address::output(std::ostream& out) const
105{
106    // Note: this outputs addresses in the form "ffff", not "0xffff".
107    // This code should always be able to write out addresses in a
108    // format that can be read in by the below input() method.  Please
109    // don't change this without talking to Milo first.
110    out << std::hex << m_address << std::dec;
111}
112
113void
114Address::input(std::istream& in)
115{
116    // Note: this only works with addresses in the form "ffff", not
117    // "0xffff".  This code should always be able to read in addresses
118    // written out by the above output() method.  Please don't change
119    // this without talking to Milo first.
120    in >> std::hex >> m_address >> std::dec;
121}
122
123Address::Address(const Address& obj)
124{
125    m_address = obj.m_address;
126}
127
128Address&
129Address::operator=(const Address& obj)
130{
131    if (this == &obj) {
132        // assert(false);
133    } else {
134        m_address = obj.m_address;
135    }
136    return *this;
137}
138
139void
140Address::makePageAddress()
141{
142    m_address = maskLowOrderBits(TheISA::LogVMPageSize);
143}
144
145Address
146page_address(const Address& addr)
147{
148    Address temp = addr;
149    temp.makePageAddress();
150    return temp;
151}
152
153Address
154next_stride_address(const Address& addr, int stride)
155{
156    Address temp = addr;
157    temp.makeNextStrideAddress(stride);
158    return temp;
159}
160