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/*
* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
* 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.
*/
#include "mem/ruby/common/Address.hh"
#include "mem/ruby/system/System.hh"
physical_address_t
Address::getLineAddress() const
{
return bitSelect(RubySystem::getBlockSizeBits(), ADDRESS_WIDTH);
}
physical_address_t
Address::getOffset() const
{
return bitSelect(0, RubySystem::getBlockSizeBits() - 1);
}
void
Address::makeLineAddress()
{
m_address = maskLowOrderBits(RubySystem::getBlockSizeBits());
}
// returns the next stride address based on line address
void
Address::makeNextStrideAddress(int stride)
{
m_address = maskLowOrderBits(RubySystem::getBlockSizeBits())
+ RubySystem::getBlockSizeBytes()*stride;
}
Index
Address::memoryModuleIndex() const
{
Index index =
bitSelect(RubySystem::getBlockSizeBits() +
RubySystem::getMemorySizeBits(), ADDRESS_WIDTH);
assert (index >= 0);
return index;
// Index indexHighPortion =
// address.bitSelect(MEMORY_SIZE_BITS - 1,
// PAGE_SIZE_BITS + NUMBER_OF_MEMORY_MODULE_BITS);
// Index indexLowPortion =
// address.bitSelect(DATA_BLOCK_BITS, PAGE_SIZE_BITS - 1);
//
// Index index = indexLowPortion |
// (indexHighPortion << (PAGE_SIZE_BITS - DATA_BLOCK_BITS));
/*
Round-robin mapping of addresses, at page size granularity
ADDRESS_WIDTH MEMORY_SIZE_BITS PAGE_SIZE_BITS DATA_BLOCK_BITS
| | | |
\ / \ / \ / \ / 0
-----------------------------------------------------------------------
| unused |xxxxxxxxxxxxxxx| |xxxxxxxxxxxxxxx| |
| |xxxxxxxxxxxxxxx| |xxxxxxxxxxxxxxx| |
-----------------------------------------------------------------------
indexHighPortion indexLowPortion
<------->
NUMBER_OF_MEMORY_MODULE_BITS
*/
}
void
Address::print(std::ostream& out) const
{
using namespace std;
out << "[" << hex << "0x" << m_address << "," << " line 0x"
<< maskLowOrderBits(RubySystem::getBlockSizeBits()) << dec << "]"
<< flush;
}
void
Address::output(std::ostream& out) const
{
// Note: this outputs addresses in the form "ffff", not "0xffff".
// This code should always be able to write out addresses in a
// format that can be read in by the below input() method. Please
// don't change this without talking to Milo first.
out << std::hex << m_address << std::dec;
}
void
Address::input(std::istream& in)
{
// Note: this only works with addresses in the form "ffff", not
// "0xffff". This code should always be able to read in addresses
// written out by the above output() method. Please don't change
// this without talking to Milo first.
in >> std::hex >> m_address >> std::dec;
}
Address::Address(const Address& obj)
{
m_address = obj.m_address;
}
Address&
Address::operator=(const Address& obj)
{
if (this == &obj) {
// assert(false);
} else {
m_address = obj.m_address;
}
return *this;
}
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