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Diffstat (limited to '')
-rw-r--r-- | src/core/hle/kernel/svc/svc_transfer_memory.cpp | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/core/hle/kernel/svc/svc_transfer_memory.cpp b/src/core/hle/kernel/svc/svc_transfer_memory.cpp new file mode 100644 index 000000000..82d469a37 --- /dev/null +++ b/src/core/hle/kernel/svc/svc_transfer_memory.cpp @@ -0,0 +1,115 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "common/scope_exit.h" +#include "core/core.h" +#include "core/hle/kernel/k_process.h" +#include "core/hle/kernel/k_scoped_resource_reservation.h" +#include "core/hle/kernel/k_transfer_memory.h" +#include "core/hle/kernel/svc.h" + +namespace Kernel::Svc { +namespace { + +constexpr bool IsValidTransferMemoryPermission(MemoryPermission perm) { + switch (perm) { + case MemoryPermission::None: + case MemoryPermission::Read: + case MemoryPermission::ReadWrite: + return true; + default: + return false; + } +} + +} // Anonymous namespace + +/// Creates a TransferMemory object +Result CreateTransferMemory(Core::System& system, Handle* out, u64 address, u64 size, + MemoryPermission map_perm) { + auto& kernel = system.Kernel(); + + // Validate the size. + R_UNLESS(Common::IsAligned(address, PageSize), ResultInvalidAddress); + R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize); + R_UNLESS(size > 0, ResultInvalidSize); + R_UNLESS((address < address + size), ResultInvalidCurrentMemory); + + // Validate the permissions. + R_UNLESS(IsValidTransferMemoryPermission(map_perm), ResultInvalidNewMemoryPermission); + + // Get the current process and handle table. + auto& process = GetCurrentProcess(kernel); + auto& handle_table = process.GetHandleTable(); + + // Reserve a new transfer memory from the process resource limit. + KScopedResourceReservation trmem_reservation(std::addressof(process), + LimitableResource::TransferMemoryCountMax); + R_UNLESS(trmem_reservation.Succeeded(), ResultLimitReached); + + // Create the transfer memory. + KTransferMemory* trmem = KTransferMemory::Create(kernel); + R_UNLESS(trmem != nullptr, ResultOutOfResource); + + // Ensure the only reference is in the handle table when we're done. + SCOPE_EXIT({ trmem->Close(); }); + + // Ensure that the region is in range. + R_UNLESS(process.PageTable().Contains(address, size), ResultInvalidCurrentMemory); + + // Initialize the transfer memory. + R_TRY(trmem->Initialize(address, size, map_perm)); + + // Commit the reservation. + trmem_reservation.Commit(); + + // Register the transfer memory. + KTransferMemory::Register(kernel, trmem); + + // Add the transfer memory to the handle table. + R_RETURN(handle_table.Add(out, trmem)); +} + +Result MapTransferMemory(Core::System& system, Handle trmem_handle, uint64_t address, uint64_t size, + MemoryPermission owner_perm) { + UNIMPLEMENTED(); + R_THROW(ResultNotImplemented); +} + +Result UnmapTransferMemory(Core::System& system, Handle trmem_handle, uint64_t address, + uint64_t size) { + UNIMPLEMENTED(); + R_THROW(ResultNotImplemented); +} + +Result MapTransferMemory64(Core::System& system, Handle trmem_handle, uint64_t address, + uint64_t size, MemoryPermission owner_perm) { + R_RETURN(MapTransferMemory(system, trmem_handle, address, size, owner_perm)); +} + +Result UnmapTransferMemory64(Core::System& system, Handle trmem_handle, uint64_t address, + uint64_t size) { + R_RETURN(UnmapTransferMemory(system, trmem_handle, address, size)); +} + +Result CreateTransferMemory64(Core::System& system, Handle* out_handle, uint64_t address, + uint64_t size, MemoryPermission map_perm) { + R_RETURN(CreateTransferMemory(system, out_handle, address, size, map_perm)); +} + +Result MapTransferMemory64From32(Core::System& system, Handle trmem_handle, uint32_t address, + uint32_t size, MemoryPermission owner_perm) { + R_RETURN(MapTransferMemory(system, trmem_handle, address, size, owner_perm)); +} + +Result UnmapTransferMemory64From32(Core::System& system, Handle trmem_handle, uint32_t address, + uint32_t size) { + R_RETURN(UnmapTransferMemory(system, trmem_handle, address, size)); +} + +Result CreateTransferMemory64From32(Core::System& system, Handle* out_handle, uint32_t address, + uint32_t size, MemoryPermission map_perm) { + R_RETURN(CreateTransferMemory(system, out_handle, address, size, map_perm)); +} + +} // namespace Kernel::Svc |