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/*
* Copyright (c) 2011-2021 Advanced Micro Devices, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the copyright holder 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 HOLDER 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.
*/
#ifndef __MEM_POOL_HH__
#define __MEM_POOL_HH__
#include <vector>
#include "base/addr_range.hh"
#include "base/types.hh"
#include "sim/serialize.hh"
namespace gem5
{
/** Class for handling allocation of physical pages in SE mode. */
class MemPool : public Serializable
{
private:
Addr pageShift = 0;
/** Start page of pool. */
Counter startPageNum = 0;
/** Page number of free memory. */
Counter freePageNum = 0;
/** The size of the pool, in number of pages. */
Counter _totalPages = 0;
MemPool() {}
friend class MemPools;
public:
MemPool(Addr page_shift, Addr ptr, Addr limit);
Counter startPage() const;
Counter freePage() const;
void setFreePage(Counter value);
Addr freePageAddr() const;
Counter totalPages() const;
Counter allocatedPages() const;
Counter freePages() const;
Addr startAddr() const;
Addr allocatedBytes() const;
Addr freeBytes() const;
Addr totalBytes() const;
Addr allocate(Addr npages);
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
};
class MemPools : public Serializable
{
private:
Addr pageShift;
std::vector<MemPool> pools;
public:
MemPools(Addr page_shift) : pageShift(page_shift) {}
void populate(const AddrRangeList &memories);
/// Allocate npages contiguous unused physical pages.
/// @return Starting address of first page
Addr allocPhysPages(int npages, int pool_id=0);
/** Amount of physical memory that exists in a pool. */
Addr memSize(int pool_id=0) const;
/** Amount of physical memory that is still free in a pool. */
Addr freeMemSize(int pool_id=0) const;
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
};
} // namespace gem5
#endif // __MEM_POOL_HH__