212 lines
7.0 KiB
C++
212 lines
7.0 KiB
C++
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <array>
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#include <atomic>
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#include <deque>
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#include <memory>
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#include <mutex>
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#include "common/common_types.h"
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#include "common/scratch_buffer.h"
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#include "common/virtual_buffer.h"
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namespace Core {
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constexpr size_t DEVICE_PAGEBITS = 12ULL;
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constexpr size_t DEVICE_PAGESIZE = 1ULL << DEVICE_PAGEBITS;
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constexpr size_t DEVICE_PAGEMASK = DEVICE_PAGESIZE - 1ULL;
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class DeviceMemory;
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namespace Memory {
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class Memory;
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}
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template <typename DTraits>
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struct DeviceMemoryManagerAllocator;
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struct Asid {
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size_t id;
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};
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template <typename Traits>
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class DeviceMemoryManager {
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using DeviceInterface = typename Traits::DeviceInterface;
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using DeviceMethods = typename Traits::DeviceMethods;
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public:
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DeviceMemoryManager(const DeviceMemory& device_memory);
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~DeviceMemoryManager();
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void BindInterface(DeviceInterface* device_inter);
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DAddr Allocate(size_t size);
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void AllocateFixed(DAddr start, size_t size);
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void Free(DAddr start, size_t size);
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void Map(DAddr address, VAddr virtual_address, size_t size, Asid asid, bool track = false);
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void Unmap(DAddr address, size_t size);
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void TrackContinuityImpl(DAddr address, VAddr virtual_address, size_t size, Asid asid);
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void TrackContinuity(DAddr address, VAddr virtual_address, size_t size, Asid asid) {
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std::scoped_lock lk(mapping_guard);
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TrackContinuityImpl(address, virtual_address, size, asid);
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}
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// Write / Read
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template <typename T>
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T* GetPointer(DAddr address);
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template <typename T>
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const T* GetPointer(DAddr address) const;
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template <typename Func>
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void ApplyOpOnPAddr(PAddr address, Common::ScratchBuffer<u32>& buffer, Func&& operation) {
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DAddr subbits = static_cast<DAddr>(address & page_mask);
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const u32 base = compressed_device_addr[(address >> page_bits)];
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if ((base >> MULTI_FLAG_BITS) == 0) [[likely]] {
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const DAddr d_address = (static_cast<DAddr>(base) << page_bits) + subbits;
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operation(d_address);
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return;
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}
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InnerGatherDeviceAddresses(buffer, address);
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for (u32 value : buffer) {
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operation((static_cast<DAddr>(value) << page_bits) + subbits);
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}
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}
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template <typename Func>
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void ApplyOpOnPointer(const u8* p, Common::ScratchBuffer<u32>& buffer, Func&& operation) {
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PAddr address = GetRawPhysicalAddr<u8>(p);
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ApplyOpOnPAddr(address, buffer, operation);
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}
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PAddr GetPhysicalRawAddressFromDAddr(DAddr address) const {
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PAddr subbits = static_cast<PAddr>(address & page_mask);
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auto paddr = compressed_physical_ptr[(address >> page_bits)];
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if (paddr == 0) {
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return 0;
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}
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return (static_cast<PAddr>(paddr - 1) << page_bits) + subbits;
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}
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template <typename T>
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void Write(DAddr address, T value);
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template <typename T>
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T Read(DAddr address) const;
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u8* GetSpan(const DAddr src_addr, const std::size_t size);
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const u8* GetSpan(const DAddr src_addr, const std::size_t size) const;
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void ReadBlock(DAddr address, void* dest_pointer, size_t size);
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void ReadBlockUnsafe(DAddr address, void* dest_pointer, size_t size);
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void WriteBlock(DAddr address, const void* src_pointer, size_t size);
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void WriteBlockUnsafe(DAddr address, const void* src_pointer, size_t size);
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Asid RegisterProcess(Memory::Memory* memory);
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void UnregisterProcess(Asid id);
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void UpdatePagesCachedCount(DAddr addr, size_t size, s32 delta);
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static constexpr size_t AS_BITS = Traits::device_virtual_bits;
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private:
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static constexpr size_t device_virtual_bits = Traits::device_virtual_bits;
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static constexpr size_t device_as_size = 1ULL << device_virtual_bits;
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static constexpr size_t physical_min_bits = 32;
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static constexpr size_t physical_max_bits = 33;
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static constexpr size_t page_bits = 12;
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static constexpr size_t page_size = 1ULL << page_bits;
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static constexpr size_t page_mask = page_size - 1ULL;
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static constexpr u32 physical_address_base = 1U << page_bits;
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static constexpr u32 MULTI_FLAG_BITS = 31;
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static constexpr u32 MULTI_FLAG = 1U << MULTI_FLAG_BITS;
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static constexpr u32 MULTI_MASK = ~MULTI_FLAG;
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template <typename T>
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T* GetPointerFromRaw(PAddr addr) {
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return reinterpret_cast<T*>(physical_base + addr);
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}
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template <typename T>
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const T* GetPointerFromRaw(PAddr addr) const {
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return reinterpret_cast<T*>(physical_base + addr);
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}
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template <typename T>
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PAddr GetRawPhysicalAddr(const T* ptr) const {
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return static_cast<PAddr>(reinterpret_cast<uintptr_t>(ptr) - physical_base);
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}
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void WalkBlock(const DAddr addr, const std::size_t size, auto on_unmapped, auto on_memory,
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auto increment);
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void InnerGatherDeviceAddresses(Common::ScratchBuffer<u32>& buffer, PAddr address);
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std::unique_ptr<DeviceMemoryManagerAllocator<Traits>> impl;
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const uintptr_t physical_base;
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DeviceInterface* device_inter;
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Common::VirtualBuffer<u32> compressed_physical_ptr;
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Common::VirtualBuffer<u32> compressed_device_addr;
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Common::VirtualBuffer<u32> continuity_tracker;
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// Process memory interfaces
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std::deque<size_t> id_pool;
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std::deque<Memory::Memory*> registered_processes;
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// Memory protection management
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static constexpr size_t guest_max_as_bits = 39;
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static constexpr size_t guest_as_size = 1ULL << guest_max_as_bits;
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static constexpr size_t guest_mask = guest_as_size - 1ULL;
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static constexpr size_t asid_start_bit = guest_max_as_bits;
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std::pair<Asid, VAddr> ExtractCPUBacking(size_t page_index) {
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auto content = cpu_backing_address[page_index];
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const VAddr address = content & guest_mask;
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const Asid asid{static_cast<size_t>(content >> asid_start_bit)};
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return std::make_pair(asid, address);
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}
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void InsertCPUBacking(size_t page_index, VAddr address, Asid asid) {
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cpu_backing_address[page_index] = address | (asid.id << asid_start_bit);
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}
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Common::VirtualBuffer<VAddr> cpu_backing_address;
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static constexpr size_t subentries = 8 / sizeof(u8);
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static constexpr size_t subentries_mask = subentries - 1;
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class CounterEntry final {
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public:
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CounterEntry() = default;
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std::atomic_uint8_t& Count(std::size_t page) {
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return values[page & subentries_mask];
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}
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const std::atomic_uint8_t& Count(std::size_t page) const {
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return values[page & subentries_mask];
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}
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private:
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std::array<std::atomic_uint8_t, subentries> values{};
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};
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static_assert(sizeof(CounterEntry) == subentries * sizeof(u8),
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"CounterEntry should be 8 bytes!");
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static constexpr size_t num_counter_entries =
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(1ULL << (device_virtual_bits - page_bits)) / subentries;
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using CachedPages = std::array<CounterEntry, num_counter_entries>;
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std::unique_ptr<CachedPages> cached_pages;
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std::mutex counter_guard;
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std::mutex mapping_guard;
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};
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} // namespace Core
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