80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
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// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <type_traits>
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#include <utility>
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#include <vector>
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#include "common/common_types.h"
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namespace Common {
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template <typename BaseAddr>
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class MultiLevelPageTable final {
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public:
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constexpr MultiLevelPageTable() = default;
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explicit MultiLevelPageTable(std::size_t address_space_bits, std::size_t first_level_bits,
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std::size_t page_bits);
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~MultiLevelPageTable() noexcept;
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MultiLevelPageTable(const MultiLevelPageTable&) = delete;
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MultiLevelPageTable& operator=(const MultiLevelPageTable&) = delete;
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MultiLevelPageTable(MultiLevelPageTable&& other) noexcept
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: address_space_bits{std::exchange(other.address_space_bits, 0)},
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first_level_bits{std::exchange(other.first_level_bits, 0)}, page_bits{std::exchange(
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other.page_bits, 0)},
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first_level_shift{std::exchange(other.first_level_shift, 0)},
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first_level_chunk_size{std::exchange(other.first_level_chunk_size, 0)},
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first_level_map{std::move(other.first_level_map)}, base_ptr{std::exchange(other.base_ptr,
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nullptr)} {}
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MultiLevelPageTable& operator=(MultiLevelPageTable&& other) noexcept {
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address_space_bits = std::exchange(other.address_space_bits, 0);
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first_level_bits = std::exchange(other.first_level_bits, 0);
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page_bits = std::exchange(other.page_bits, 0);
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first_level_shift = std::exchange(other.first_level_shift, 0);
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first_level_chunk_size = std::exchange(other.first_level_chunk_size, 0);
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alloc_size = std::exchange(other.alloc_size, 0);
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first_level_map = std::move(other.first_level_map);
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base_ptr = std::exchange(other.base_ptr, nullptr);
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return *this;
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}
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void ReserveRange(u64 start, std::size_t size);
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[[nodiscard]] constexpr const BaseAddr& operator[](std::size_t index) const {
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return base_ptr[index];
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}
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[[nodiscard]] constexpr BaseAddr& operator[](std::size_t index) {
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return base_ptr[index];
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}
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[[nodiscard]] constexpr BaseAddr* data() {
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return base_ptr;
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}
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[[nodiscard]] constexpr const BaseAddr* data() const {
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return base_ptr;
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}
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private:
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void AllocateLevel(u64 level);
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std::size_t address_space_bits{};
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std::size_t first_level_bits{};
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std::size_t page_bits{};
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std::size_t first_level_shift{};
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std::size_t first_level_chunk_size{};
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std::size_t alloc_size{};
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std::vector<void*> first_level_map{};
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BaseAddr* base_ptr{};
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};
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} // namespace Common
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