663fa147e8
Also add a const version of the getPhysMem accessor so it can be used with a const System class. Change-Id: Ieccd0bd4c2c8fe69820eb1a0b0c835722334630d Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/50343 Tested-by: kokoro <noreply+kokoro@google.com> Maintainer: Gabe Black <gabe.black@gmail.com> Reviewed-by: Matthew Poremba <matthew.poremba@amd.com>
118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
/*
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* Copyright (c) 2011-2021 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* For use for simulation and test purposes only
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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 met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __MEM_POOL_HH__
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#define __MEM_POOL_HH__
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#include <vector>
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#include "base/types.hh"
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#include "sim/serialize.hh"
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namespace gem5
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{
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class System;
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/** Class for handling allocation of physical pages in SE mode. */
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class MemPool : public Serializable
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{
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private:
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Addr pageShift = 0;
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/** Start page of pool. */
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Counter startPageNum = 0;
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/** Page number of free memory. */
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Counter freePageNum = 0;
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/** The size of the pool, in number of pages. */
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Counter _totalPages = 0;
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MemPool() {}
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friend class MemPools;
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public:
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MemPool(Addr page_shift, Addr ptr, Addr limit);
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Counter startPage() const;
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Counter freePage() const;
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void setFreePage(Counter value);
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Addr freePageAddr() const;
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Counter totalPages() const;
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Counter allocatedPages() const;
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Counter freePages() const;
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Addr startAddr() const;
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Addr allocatedBytes() const;
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Addr freeBytes() const;
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Addr totalBytes() const;
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Addr allocate(Addr npages);
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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};
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class MemPools : public Serializable
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{
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private:
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Addr pageShift;
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std::vector<MemPool> pools;
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public:
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MemPools(Addr page_shift) : pageShift(page_shift) {}
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void populate(const System &sys);
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/// Allocate npages contiguous unused physical pages.
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/// @return Starting address of first page
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Addr allocPhysPages(int npages, int pool_id=0);
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/** Amount of physical memory that exists in a pool. */
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Addr memSize(int pool_id=0) const;
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/** Amount of physical memory that is still free in a pool. */
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Addr freeMemSize(int pool_id=0) const;
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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};
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} // namespace gem5
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#endif // __MEM_POOL_HH__
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