forked from suyu/suyu
96 lines
3.3 KiB
C++
96 lines
3.3 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/assert.h"
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#include "core/core.h"
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#include "core/hle/kernel/k_page_table.h"
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#include "core/hle/kernel/k_scoped_resource_reservation.h"
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#include "core/hle/kernel/k_shared_memory.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/svc_results.h"
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namespace Kernel {
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KSharedMemory::KSharedMemory(KernelCore& kernel) : KAutoObjectWithSlabHeapAndContainer{kernel} {}
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KSharedMemory::~KSharedMemory() {
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kernel.GetSystemResourceLimit()->Release(LimitableResource::PhysicalMemory, size);
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}
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ResultCode KSharedMemory::Initialize(KernelCore& kernel_, Core::DeviceMemory& device_memory_,
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Process* owner_process_, KPageLinkedList&& page_list_,
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KMemoryPermission owner_permission_,
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KMemoryPermission user_permission_, PAddr physical_address_,
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std::size_t size_, std::string name_) {
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// Set members.
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owner_process = owner_process_;
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device_memory = &device_memory_;
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page_list = std::move(page_list_);
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owner_permission = owner_permission_;
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user_permission = user_permission_;
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physical_address = physical_address_;
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size = size_;
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name = name_;
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// Get the resource limit.
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KResourceLimit* reslimit = kernel.GetSystemResourceLimit();
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// Reserve memory for ourselves.
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KScopedResourceReservation memory_reservation(reslimit, LimitableResource::PhysicalMemory,
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size_);
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R_UNLESS(memory_reservation.Succeeded(), ResultLimitReached);
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// Commit our reservation.
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memory_reservation.Commit();
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// Set our resource limit.
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resource_limit = reslimit;
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resource_limit->Open();
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// Mark initialized.
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is_initialized = true;
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// Clear all pages in the memory.
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std::memset(device_memory_.GetPointer(physical_address_), 0, size_);
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return RESULT_SUCCESS;
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}
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void KSharedMemory::Finalize() {
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///* Get the number of pages. */
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// const size_t num_pages = m_page_group.GetNumPages();
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// const size_t size = num_pages * PageSize;
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///* Close and finalize the page group. */
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// m_page_group.Close();
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// m_page_group.Finalize();
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// Release the memory reservation.
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resource_limit->Release(LimitableResource::PhysicalMemory, size);
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resource_limit->Close();
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// Perform inherited finalization.
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KAutoObjectWithSlabHeapAndContainer<KSharedMemory, KAutoObjectWithList>::Finalize();
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}
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ResultCode KSharedMemory::Map(Process& target_process, VAddr address, std::size_t size,
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KMemoryPermission permissions) {
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const u64 page_count{(size + PageSize - 1) / PageSize};
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if (page_list.GetNumPages() != page_count) {
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UNIMPLEMENTED_MSG("Page count does not match");
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}
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const KMemoryPermission expected =
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&target_process == owner_process ? owner_permission : user_permission;
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if (permissions != expected) {
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UNIMPLEMENTED_MSG("Permission does not match");
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}
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return target_process.PageTable().MapPages(address, page_list, KMemoryState::Shared,
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permissions);
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}
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} // namespace Kernel
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