67 lines
2 KiB
C++
67 lines
2 KiB
C++
// Copyright 2018 yuzu emulator team
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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 <array>
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#include <memory>
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#include <vector>
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#include <boost/optional.hpp>
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#include "common/common_types.h"
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namespace Tegra {
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/// Virtual addresses in the GPU's memory map are 64 bit.
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using GPUVAddr = u64;
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class MemoryManager final {
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public:
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MemoryManager() = default;
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GPUVAddr AllocateSpace(u64 size, u64 align);
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GPUVAddr AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align);
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GPUVAddr MapBufferEx(VAddr cpu_addr, u64 size);
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GPUVAddr MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size);
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GPUVAddr UnmapBuffer(GPUVAddr gpu_addr, u64 size);
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boost::optional<VAddr> GpuToCpuAddress(GPUVAddr gpu_addr);
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std::vector<GPUVAddr> CpuToGpuAddress(VAddr cpu_addr) const;
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static constexpr u64 PAGE_BITS = 16;
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static constexpr u64 PAGE_SIZE = 1 << PAGE_BITS;
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static constexpr u64 PAGE_MASK = PAGE_SIZE - 1;
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private:
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boost::optional<GPUVAddr> FindFreeBlock(u64 size, u64 align = 1);
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bool IsPageMapped(GPUVAddr gpu_addr);
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VAddr& PageSlot(GPUVAddr gpu_addr);
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enum class PageStatus : u64 {
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Unmapped = 0xFFFFFFFFFFFFFFFFULL,
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Allocated = 0xFFFFFFFFFFFFFFFEULL,
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};
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static constexpr u64 MAX_ADDRESS{0x10000000000ULL};
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static constexpr u64 PAGE_TABLE_BITS{10};
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static constexpr u64 PAGE_TABLE_SIZE{1 << PAGE_TABLE_BITS};
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static constexpr u64 PAGE_TABLE_MASK{PAGE_TABLE_SIZE - 1};
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static constexpr u64 PAGE_BLOCK_BITS{14};
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static constexpr u64 PAGE_BLOCK_SIZE{1 << PAGE_BLOCK_BITS};
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static constexpr u64 PAGE_BLOCK_MASK{PAGE_BLOCK_SIZE - 1};
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using PageBlock = std::array<VAddr, PAGE_BLOCK_SIZE>;
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std::array<std::unique_ptr<PageBlock>, PAGE_TABLE_SIZE> page_table{};
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struct MappedRegion {
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VAddr cpu_addr;
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GPUVAddr gpu_addr;
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u64 size;
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};
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std::vector<MappedRegion> mapped_regions;
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};
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} // namespace Tegra
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