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// 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_page_table.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/svc_results.h"
namespace Kernel {
KSharedMemory::KSharedMemory(KernelCore& kernel) : KAutoObjectWithSlabHeapAndContainer{kernel} {}
KSharedMemory::~KSharedMemory() {
kernel.GetSystemResourceLimit()->Release(LimitableResource::PhysicalMemory, size);
}
ResultCode KSharedMemory::Initialize(KernelCore& kernel_, Core::DeviceMemory& device_memory_,
KProcess* owner_process_, KPageLinkedList&& page_list_,
KMemoryPermission owner_permission_,
KMemoryPermission user_permission_, PAddr physical_address_,
std::size_t size_, std::string name_) {
// Set members.
owner_process = owner_process_;
device_memory = &device_memory_;
page_list = std::move(page_list_);
owner_permission = owner_permission_;
user_permission = user_permission_;
physical_address = physical_address_;
size = size_;
name = name_;
// Get the resource limit.
KResourceLimit* reslimit = kernel.GetSystemResourceLimit();
// Reserve memory for ourselves.
KScopedResourceReservation memory_reservation(reslimit, LimitableResource::PhysicalMemory,
size_);
R_UNLESS(memory_reservation.Succeeded(), ResultLimitReached);
// Commit our reservation.
memory_reservation.Commit();
// Set our resource limit.
resource_limit = reslimit;
resource_limit->Open();
// Mark initialized.
is_initialized = true;
// Clear all pages in the memory.
std::memset(device_memory_.GetPointer(physical_address_), 0, size_);
return RESULT_SUCCESS;
}
void KSharedMemory::Finalize() {
///* Get the number of pages. */
// const size_t num_pages = m_page_group.GetNumPages();
// const size_t size = num_pages * PageSize;
///* Close and finalize the page group. */
// m_page_group.Close();
// m_page_group.Finalize();
// Release the memory reservation.
resource_limit->Release(LimitableResource::PhysicalMemory, size);
resource_limit->Close();
// Perform inherited finalization.
KAutoObjectWithSlabHeapAndContainer<KSharedMemory, KAutoObjectWithList>::Finalize();
}
ResultCode KSharedMemory::Map(KProcess& target_process, VAddr address, std::size_t size,
KMemoryPermission permissions) {
const u64 page_count{(size + PageSize - 1) / PageSize};
if (page_list.GetNumPages() != page_count) {
UNIMPLEMENTED_MSG("Page count does not match");
}
const KMemoryPermission 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, KMemoryState::Shared,
permissions);
}
} // namespace Kernel
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