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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 "base/bitfield.hh"
#include "mem/ruby/system/RubySystem.hh"
Addr
bitSelect(Addr addr, unsigned int small, unsigned int big)
{
assert(big >= small);
if (big >= ADDRESS_WIDTH - 1) {
return (addr >> small);
} else {
Addr mask = ~((Addr)~0 << (big + 1));
// FIXME - this is slow to manipulate a 64-bit number using 32-bits
Addr partial = (addr & mask);
return (partial >> small);
}
}
Addr
maskLowOrderBits(Addr addr, unsigned int number)
{
return mbits<Addr>(addr, 63, number);
}
Addr
getOffset(Addr addr)
{
return bitSelect(addr, 0, RubySystem::getBlockSizeBits() - 1);
}
Addr
makeLineAddress(Addr addr)
{
return mbits<Addr>(addr, 63, RubySystem::getBlockSizeBits());
}
// returns the next stride address based on line address
Addr
makeNextStrideAddress(Addr addr, int stride)
{
return makeLineAddress(addr) + RubySystem::getBlockSizeBytes() * stride;
}
std::string
printAddress(Addr addr)
{
std::stringstream out;
out << "[" << std::hex << "0x" << addr << "," << " line 0x"
<< makeLineAddress(addr) << std::dec << "]";
return out.str();
}
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