From 0d62f30b00fbfe598573ea8fd433bd64d7be3e5f Mon Sep 17 00:00:00 2001 From: bunnei Date: Fri, 5 Feb 2021 23:14:31 -0800 Subject: hle: kernel: Rename SharedMemory to KSharedMemory. --- src/core/hle/kernel/k_shared_memory.cpp | 66 +++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 src/core/hle/kernel/k_shared_memory.cpp (limited to 'src/core/hle/kernel/k_shared_memory.cpp') diff --git a/src/core/hle/kernel/k_shared_memory.cpp b/src/core/hle/kernel/k_shared_memory.cpp new file mode 100644 index 000000000..dd82e0217 --- /dev/null +++ b/src/core/hle/kernel/k_shared_memory.cpp @@ -0,0 +1,66 @@ +// Copyright 2014 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/assert.h" +#include "core/core.h" +#include "core/hle/kernel/k_scoped_resource_reservation.h" +#include "core/hle/kernel/k_shared_memory.h" +#include "core/hle/kernel/kernel.h" +#include "core/hle/kernel/memory/page_table.h" + +namespace Kernel { + +KSharedMemory::KSharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory) + : Object{kernel}, device_memory{device_memory} {} + +KSharedMemory::~KSharedMemory() { + kernel.GetSystemResourceLimit()->Release(LimitableResource::PhysicalMemory, size); +} + +std::shared_ptr KSharedMemory::Create( + KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process, + Memory::PageLinkedList&& page_list, Memory::MemoryPermission owner_permission, + Memory::MemoryPermission user_permission, PAddr physical_address, std::size_t size, + std::string name) { + + const auto resource_limit = kernel.GetSystemResourceLimit(); + KScopedResourceReservation memory_reservation(resource_limit, LimitableResource::PhysicalMemory, + size); + ASSERT(memory_reservation.Succeeded()); + + std::shared_ptr shared_memory{ + std::make_shared(kernel, device_memory)}; + + shared_memory->owner_process = owner_process; + shared_memory->page_list = std::move(page_list); + shared_memory->owner_permission = owner_permission; + shared_memory->user_permission = user_permission; + shared_memory->physical_address = physical_address; + shared_memory->size = size; + shared_memory->name = name; + + memory_reservation.Commit(); + return shared_memory; +} + +ResultCode KSharedMemory::Map(Process& target_process, VAddr address, std::size_t size, + Memory::MemoryPermission permissions) { + const u64 page_count{(size + Memory::PageSize - 1) / Memory::PageSize}; + + if (page_list.GetNumPages() != page_count) { + UNIMPLEMENTED_MSG("Page count does not match"); + } + + const Memory::MemoryPermission expected = + &target_process == owner_process ? owner_permission : user_permission; + + if (permissions != expected) { + UNIMPLEMENTED_MSG("Permission does not match"); + } + + return target_process.PageTable().MapPages(address, page_list, Memory::MemoryState::Shared, + permissions); +} + +} // namespace Kernel -- cgit v1.2.3