6687265fe2
Change-Id: Icfba8e23b5f6820a6ddefe1a50abbe5f8825b7b5 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/25444 Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
95 lines
3.6 KiB
C++
95 lines
3.6 KiB
C++
/*
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* Copyright (c) 2017-2018 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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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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#ifndef __CPU_UTILS_HH__
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#define __CPU_UTILS_HH__
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#include "base/types.hh"
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/**
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* Calculates the offset of a given address wrt aligned fixed-size blocks.
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* @param addr Input address.
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* @param block_size Block size in bytes.
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* @return Offset of the given address in bytes.
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*/
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inline Addr
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addrBlockOffset(Addr addr, Addr block_size)
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{
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return addr & (block_size - 1);
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}
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/**
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* Returns the address of the closest aligned fixed-size block to the given
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* address.
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* @param addr Input address.
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* @param block_size Block size in bytes.
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* @return Address of the closest aligned block.
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*/
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inline Addr
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addrBlockAlign(Addr addr, Addr block_size)
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{
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return addr & ~(block_size - 1);
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}
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/**
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* Returns true if the given memory access (address, size) needs to be
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* fragmented across aligned fixed-size blocks.
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* @param addr Address of the memory access.
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* @param size Size of the memory access.
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* @param block_size Block size in bytes.
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* @return True if the memory access needs to be fragmented.
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*/
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inline bool
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transferNeedsBurst(Addr addr, unsigned int size, unsigned int block_size)
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{
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return (addrBlockOffset(addr, block_size) + size) > block_size;
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}
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/**
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* Test if there is any active element in an enablement range.
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*/
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inline bool
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isAnyActiveElement(const std::vector<bool>::const_iterator& it_start,
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const std::vector<bool>::const_iterator& it_end)
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{
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auto it_tmp = it_start;
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for (;it_tmp != it_end && !(*it_tmp); ++it_tmp);
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return (it_tmp != it_end);
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}
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#endif // __CPU_UTILS_HH__
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