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/*
* Copyright (c) 2011-2021 Advanced Micro Devices, Inc.
* All rights reserved.
*
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* 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
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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*/
#include "sim/mem_pool.hh"
#include "base/addr_range.hh"
#include "base/logging.hh"
namespace gem5
{
MemPool::MemPool(Addr page_shift, Addr ptr, Addr limit)
: pageShift(page_shift), startPageNum(ptr >> page_shift),
freePageNum(ptr >> page_shift),
_totalPages((limit - ptr) >> page_shift)
{
gem5_assert(_totalPages > 0);
}
Counter
MemPool::startPage() const
{
return startPageNum;
}
Counter
MemPool::freePage() const
{
return freePageNum;
}
void
MemPool::setFreePage(Counter value)
{
freePageNum = value;
}
Addr
MemPool::freePageAddr() const
{
return freePageNum << pageShift;
}
Counter
MemPool::totalPages() const
{
return _totalPages;
}
Counter
MemPool::allocatedPages() const
{
return freePageNum - startPageNum;
}
Counter
MemPool::freePages() const
{
return _totalPages - allocatedPages();
}
Addr
MemPool::startAddr() const
{
return startPage() << pageShift;
}
Addr
MemPool::allocatedBytes() const
{
return allocatedPages() << pageShift;
}
Addr
MemPool::freeBytes() const
{
return freePages() << pageShift;
}
Addr
MemPool::totalBytes() const
{
return totalPages() << pageShift;
}
Addr
MemPool::allocate(Addr npages)
{
Addr return_addr = freePageAddr();
freePageNum += npages;
fatal_if(freePages() <= 0,
"Out of memory, please increase size of physical memory.");
return return_addr;
}
void
MemPool::serialize(CheckpointOut &cp) const
{
paramOut(cp, "page_shift", pageShift);
paramOut(cp, "start_page", startPageNum);
paramOut(cp, "free_page_num", freePageNum);
paramOut(cp, "total_pages", _totalPages);
}
void
MemPool::unserialize(CheckpointIn &cp)
{
paramIn(cp, "page_shift", pageShift);
paramIn(cp, "start_page", startPageNum);
paramIn(cp, "free_page_num", freePageNum);
paramIn(cp, "total_pages", _totalPages);
}
void
MemPools::populate(const AddrRangeList &memories)
{
for (const auto &mem : memories)
pools.emplace_back(pageShift, mem.start(), mem.end());
}
Addr
MemPools::allocPhysPages(int npages, int pool_id)
{
return pools[pool_id].allocate(npages);
}
Addr
MemPools::memSize(int pool_id) const
{
return pools[pool_id].totalBytes();
}
Addr
MemPools::freeMemSize(int pool_id) const
{
return pools[pool_id].freeBytes();
}
void
MemPools::serialize(CheckpointOut &cp) const
{
int num_pools = pools.size();
SERIALIZE_SCALAR(num_pools);
for (int i = 0; i < num_pools; i++)
pools[i].serializeSection(cp, csprintf("pool%d", i));
}
void
MemPools::unserialize(CheckpointIn &cp)
{
int num_pools = 0;
UNSERIALIZE_SCALAR(num_pools);
for (int i = 0; i < num_pools; i++) {
MemPool pool;
pool.unserializeSection(cp, csprintf("pool%d", i));
pools.push_back(pool);
}
}
} // namespace gem5