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