e4537dfbba
The System object supports multiple memory pools but there is currently no way to specify which pool to allocate from in SE mode. This patch adds a optional poolID argument to the allocation functions. Change-Id: I1c732f28905f3b3875adee5f2b0d9abb39a6c5d1 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/42215 Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Maintainer: Matt Sinclair <mattdsinclair@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
117 lines
3.0 KiB
C++
117 lines
3.0 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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#include "sim/mem_pool.hh"
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#include "sim/system.hh"
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MemPool::MemPool(System *system, Addr ptr, Addr limit)
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: sys(system), freePageNum(ptr >> sys->getPageShift()),
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_totalPages(limit >> sys->getPageShift())
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{
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}
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Counter
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MemPool::freePage() const
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{
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return freePageNum;
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}
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void
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MemPool::setFreePage(Counter value)
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{
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freePageNum = value;
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}
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Addr
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MemPool::freePageAddr() const
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{
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return freePageNum << sys->getPageShift();
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}
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Counter
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MemPool::totalPages() const
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{
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return _totalPages;
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}
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Counter
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MemPool::allocatedPages() const
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{
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return freePageNum;
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}
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Counter
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MemPool::freePages() const
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{
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return _totalPages - freePageNum;
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}
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Addr
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MemPool::allocatedBytes() const
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{
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return allocatedPages() << sys->getPageShift();
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}
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Addr
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MemPool::freeBytes() const
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{
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return freePages() << sys->getPageShift();
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}
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Addr
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MemPool::totalBytes() const
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{
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return totalPages() << sys->getPageShift();
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}
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Addr
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MemPool::allocate(Addr npages)
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{
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Addr return_addr = freePageAddr();
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freePageNum += npages;
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Addr next_return_addr = freePageAddr();
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if (sys->m5opRange().valid() &&
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next_return_addr >= sys->m5opRange().start()) {
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warn("Reached m5ops MMIO region\n");
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return_addr = sys->m5opRange().end();
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freePageNum = (return_addr >> sys->getPageShift()) + npages;
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}
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fatal_if((freePages() <= 0), "Out of memory, "
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"please increase size of physical memory.");
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return return_addr;
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}
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