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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <memory>
#include <optional>
#include <vector>
#include "common/common_types.h"
namespace Tegra {
/// Virtual addresses in the GPU's memory map are 64 bit.
using GPUVAddr = u64;
class MemoryManager final {
public:
MemoryManager() = default;
GPUVAddr AllocateSpace(u64 size, u64 align);
GPUVAddr AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align);
GPUVAddr MapBufferEx(VAddr cpu_addr, u64 size);
GPUVAddr MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size);
GPUVAddr UnmapBuffer(GPUVAddr gpu_addr, u64 size);
GPUVAddr GetRegionEnd(GPUVAddr region_start) const;
std::optional<VAddr> GpuToCpuAddress(GPUVAddr gpu_addr);
std::vector<GPUVAddr> CpuToGpuAddress(VAddr cpu_addr) const;
static constexpr u64 PAGE_BITS = 16;
static constexpr u64 PAGE_SIZE = 1 << PAGE_BITS;
static constexpr u64 PAGE_MASK = PAGE_SIZE - 1;
private:
std::optional<GPUVAddr> FindFreeBlock(u64 size, u64 align = 1);
bool IsPageMapped(GPUVAddr gpu_addr);
VAddr& PageSlot(GPUVAddr gpu_addr);
enum class PageStatus : u64 {
Unmapped = 0xFFFFFFFFFFFFFFFFULL,
Allocated = 0xFFFFFFFFFFFFFFFEULL,
};
static constexpr u64 MAX_ADDRESS{0x10000000000ULL};
static constexpr u64 PAGE_TABLE_BITS{10};
static constexpr u64 PAGE_TABLE_SIZE{1 << PAGE_TABLE_BITS};
static constexpr u64 PAGE_TABLE_MASK{PAGE_TABLE_SIZE - 1};
static constexpr u64 PAGE_BLOCK_BITS{14};
static constexpr u64 PAGE_BLOCK_SIZE{1 << PAGE_BLOCK_BITS};
static constexpr u64 PAGE_BLOCK_MASK{PAGE_BLOCK_SIZE - 1};
using PageBlock = std::array<VAddr, PAGE_BLOCK_SIZE>;
std::array<std::unique_ptr<PageBlock>, PAGE_TABLE_SIZE> page_table{};
struct MappedRegion {
VAddr cpu_addr;
GPUVAddr gpu_addr;
u64 size;
};
std::vector<MappedRegion> mapped_regions;
};
} // namespace Tegra
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