91a84c5b3c
This patch eliminates the type Address defined by the ruby memory system. This memory system would now use the type Addr that is in use by the rest of the system.
123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/*
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* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "mem/ruby/common/Address.hh"
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#include "mem/ruby/system/System.hh"
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Addr
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bitSelect(Addr addr, unsigned int small, unsigned int big)
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{
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assert(big >= small);
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if (big >= ADDRESS_WIDTH - 1) {
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return (addr >> small);
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} else {
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Addr mask = ~((Addr)~0 << (big + 1));
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// FIXME - this is slow to manipulate a 64-bit number using 32-bits
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Addr partial = (addr & mask);
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return (partial >> small);
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}
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}
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Addr
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bitRemove(Addr addr, unsigned int small, unsigned int big)
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{
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assert(big >= small);
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if (small >= ADDRESS_WIDTH - 1) {
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return addr;
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} else if (big >= ADDRESS_WIDTH - 1) {
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Addr mask = (Addr)~0 >> small;
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return (addr & mask);
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} else if (small == 0) {
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Addr mask = (Addr)~0 << big;
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return (addr & mask);
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} else {
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Addr mask = ~((Addr)~0 << small);
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Addr lower_bits = addr & mask;
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mask = (Addr)~0 << (big + 1);
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Addr higher_bits = addr & mask;
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// Shift the valid high bits over the removed section
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higher_bits = higher_bits >> (big - small + 1);
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return (higher_bits | lower_bits);
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}
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}
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Addr
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maskLowOrderBits(Addr addr, unsigned int number)
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{
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Addr mask;
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if (number >= ADDRESS_WIDTH - 1) {
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mask = ~0;
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} else {
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mask = (Addr)~0 << number;
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}
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return (addr & mask);
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}
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Addr
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maskHighOrderBits(Addr addr, unsigned int number)
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{
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Addr mask;
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if (number >= ADDRESS_WIDTH - 1) {
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mask = ~0;
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} else {
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mask = (Addr)~0 >> number;
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}
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return (addr & mask);
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}
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Addr
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shiftLowOrderBits(Addr addr, unsigned int number)
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{
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return (addr >> number);
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}
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Addr
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getOffset(Addr addr)
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{
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return bitSelect(addr, 0, RubySystem::getBlockSizeBits() - 1);
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}
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Addr
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makeLineAddress(Addr addr)
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{
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return maskLowOrderBits(addr, RubySystem::getBlockSizeBits());
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}
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// returns the next stride address based on line address
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Addr
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makeNextStrideAddress(Addr addr, int stride)
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{
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return maskLowOrderBits(addr, RubySystem::getBlockSizeBits())
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+ RubySystem::getBlockSizeBytes() * stride;
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}
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