diff options
Diffstat (limited to '')
-rw-r--r-- | src/core/device_memory_manager.h | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/src/core/device_memory_manager.h b/src/core/device_memory_manager.h index 0861b792d..71b95016c 100644 --- a/src/core/device_memory_manager.h +++ b/src/core/device_memory_manager.h @@ -5,6 +5,8 @@ #include <deque> #include <memory> +#include <array> +#include <atomic> #include "common/common_types.h" #include "common/virtual_buffer.h" @@ -23,6 +25,7 @@ struct DeviceMemoryManagerAllocator; template <typename Traits> class DeviceMemoryManager { using DeviceInterface = typename Traits::DeviceInterface; + using DeviceMethods = Traits::DeviceMethods; public: DeviceMemoryManager(const DeviceMemory& device_memory); @@ -35,7 +38,7 @@ public: DAddr AllocatePinned(size_t size); void Free(DAddr start, size_t size); - void Map(DAddr address, VAddr virtual_address, size_t size, size_t p_id); + void Map(DAddr address, VAddr virtual_address, size_t size, size_t process_id); void Unmap(DAddr address, size_t size); // Write / Read @@ -57,6 +60,8 @@ public: size_t RegisterProcess(Memory::Memory* memory); void UnregisterProcess(size_t id); + void UpdatePagesCachedCount(DAddr addr, size_t size, s32 delta); + private: static constexpr bool supports_pinning = Traits::supports_pinning; static constexpr size_t device_virtual_bits = Traits::device_virtual_bits; @@ -90,8 +95,52 @@ private: Common::VirtualBuffer<u32> compressed_physical_ptr; Common::VirtualBuffer<u32> compressed_device_addr; + // Process memory interfaces + std::deque<size_t> id_pool; std::deque<Memory::Memory*> registered_processes; + + // Memory protection management + + static constexpr size_t guest_max_as_bits = 39; + static constexpr size_t guest_as_size = 1ULL << guest_max_as_bits; + static constexpr size_t guest_mask = guest_as_size - 1ULL; + static constexpr size_t process_id_start_bit = guest_max_as_bits; + + std::pair<size_t, VAddr> ExtractCPUBacking(size_t page_index) { + auto content = cpu_backing_address[page_index]; + const VAddr address = content & guest_mask; + const size_t process_id = static_cast<size_t>(content >> process_id_start_bit); + return std::make_pair(process_id, address); + } + + void InsertCPUBacking(size_t page_index, VAddr address, size_t process_id) { + cpu_backing_address[page_index] = address | (process_id << page_index); + } + + Common::VirtualBuffer<VAddr> cpu_backing_address; + static constexpr size_t subentries = 4; + static constexpr size_t subentries_mask = subentries - 1; + class CounterEntry final { + public: + CounterEntry() = default; + + std::atomic_uint16_t& Count(std::size_t page) { + return values[page & subentries_mask]; + } + + const std::atomic_uint16_t& Count(std::size_t page) const { + return values[page & subentries_mask]; + } + + private: + std::array<std::atomic_uint16_t, subentries> values{}; + }; + static_assert(sizeof(CounterEntry) == subentries * sizeof(u16), "CounterEntry should be 8 bytes!"); + + static constexpr size_t num_counter_entries = (1ULL << (device_virtual_bits - page_bits)) / subentries; + using CachedPages = std::array<CounterEntry, num_counter_entries>; + std::unique_ptr<CachedPages> cached_pages; }; } // namespace Core
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