// 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/kernel.h"
#include "core/hle/kernel/memory/page_table.h"
#include "core/hle/kernel/shared_memory.h"
namespace Kernel {
SharedMemory::SharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory)
: Object{kernel}, device_memory{device_memory} {}
SharedMemory::~SharedMemory() = default;
std::shared_ptr<SharedMemory> SharedMemory::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) {
std::shared_ptr<SharedMemory> shared_memory{
std::make_shared<SharedMemory>(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;
return shared_memory;
}
ResultCode SharedMemory::Map(Process& target_process, VAddr address, std::size_t size,
Memory::MemoryPermission permission) {
const u64 page_count{(size + Memory::PageSize - 1) / Memory::PageSize};
if (page_list.GetNumPages() != page_count) {
UNIMPLEMENTED();
}
Memory::MemoryPermission expected =
&target_process == owner_process ? owner_permission : user_permission;
if (permission != expected) {
UNIMPLEMENTED();
}
return target_process.PageTable().MapPages(address, page_list, Memory::MemoryState::Shared,
permission);
}
} // namespace Kernel