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// 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<PhysicalMemory>(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
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