53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/*
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* Copyright (C) 2018-2020 Intel Corporation
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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#pragma once
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#include "shared/source/helpers/aligned_memory.h"
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#include "shared/source/helpers/constants.h"
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#include "shared/source/helpers/debug_helpers.h"
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#include "shared/source/memory_manager/memory_banks.h"
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#include <atomic>
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#include <mutex>
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namespace NEO {
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class PhysicalAddressAllocator {
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public:
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PhysicalAddressAllocator() {
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mainAllocator.store(initialPageAddress);
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}
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virtual ~PhysicalAddressAllocator() = default;
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uint64_t reserve4kPage(uint32_t memoryBank) {
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return reservePage(memoryBank, MemoryConstants::pageSize, MemoryConstants::pageSize);
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}
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uint64_t reserve64kPage(uint32_t memoryBank) {
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return reservePage(memoryBank, MemoryConstants::pageSize64k, MemoryConstants::pageSize64k);
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}
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virtual uint64_t reservePage(uint32_t memoryBank, size_t pageSize, size_t alignement) {
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UNRECOVERABLE_IF(memoryBank != MemoryBanks::MainBank);
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std::unique_lock<std::mutex> lock(pageReserveMutex);
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auto currentAddress = mainAllocator.load();
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auto alignmentSize = alignUp(currentAddress, alignement) - currentAddress;
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mainAllocator += alignmentSize;
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return mainAllocator.fetch_add(pageSize);
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}
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protected:
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std::atomic<uint64_t> mainAllocator;
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std::mutex pageReserveMutex;
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const uint64_t initialPageAddress = 0x1000;
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};
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} // namespace NEO
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