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Diffstat (limited to 'src/core/hle/kernel/transfer_memory.cpp')
-rw-r--r-- | src/core/hle/kernel/transfer_memory.cpp | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/core/hle/kernel/transfer_memory.cpp b/src/core/hle/kernel/transfer_memory.cpp new file mode 100644 index 000000000..26c4e5e67 --- /dev/null +++ b/src/core/hle/kernel/transfer_memory.cpp @@ -0,0 +1,81 @@ +// Copyright 2019 yuzu emulator team +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "core/hle/kernel/errors.h" +#include "core/hle/kernel/kernel.h" +#include "core/hle/kernel/process.h" +#include "core/hle/kernel/shared_memory.h" +#include "core/hle/kernel/transfer_memory.h" +#include "core/hle/result.h" + +namespace Kernel { + +TransferMemory::TransferMemory(KernelCore& kernel) : Object{kernel} {} +TransferMemory::~TransferMemory() = default; + +SharedPtr<TransferMemory> TransferMemory::Create(KernelCore& kernel, VAddr base_address, u64 size, + MemoryPermission permissions) { + SharedPtr<TransferMemory> transfer_memory{new TransferMemory(kernel)}; + + transfer_memory->base_address = base_address; + transfer_memory->memory_size = size; + transfer_memory->owner_permissions = permissions; + transfer_memory->owner_process = kernel.CurrentProcess(); + + return transfer_memory; +} + +const u8* TransferMemory::GetPointer() const { + return backing_block.get()->data(); +} + +u64 TransferMemory::GetSize() const { + return memory_size; +} + +ResultCode TransferMemory::MapMemory(VAddr address, u64 size, MemoryPermission permissions) { + if (memory_size != size) { + return ERR_INVALID_SIZE; + } + + if (owner_permissions != permissions) { + return ERR_INVALID_STATE; + } + + if (is_mapped) { + return ERR_INVALID_STATE; + } + + backing_block = std::make_shared<std::vector<u8>>(size); + + const auto map_state = owner_permissions == MemoryPermission::None + ? MemoryState::TransferMemoryIsolated + : MemoryState::TransferMemory; + auto& vm_manager = owner_process->VMManager(); + const auto map_result = vm_manager.MapMemoryBlock(address, backing_block, 0, size, map_state); + if (map_result.Failed()) { + return map_result.Code(); + } + + is_mapped = true; + return RESULT_SUCCESS; +} + +ResultCode TransferMemory::UnmapMemory(VAddr address, u64 size) { + if (memory_size != size) { + return ERR_INVALID_SIZE; + } + + auto& vm_manager = owner_process->VMManager(); + const auto result = vm_manager.UnmapRange(address, size); + + if (result.IsError()) { + return result; + } + + is_mapped = false; + return RESULT_SUCCESS; +} + +} // namespace Kernel |