/* * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org> * * SPDX-License-Identifier: BSD-2-Clause */ #include <Kernel/Heap/kmalloc.h> #include <Kernel/Memory/MemoryManager.h> #include <Kernel/Memory/PhysicalPage.h> namespace Kernel::Memory { NonnullRefPtr<PhysicalPage> PhysicalPage::create(PhysicalAddress paddr, MayReturnToFreeList may_return_to_freelist) { auto& physical_page_entry = MM.get_physical_page_entry(paddr); return adopt_ref(*new (&physical_page_entry.allocated.physical_page) PhysicalPage(may_return_to_freelist)); } PhysicalPage::PhysicalPage(MayReturnToFreeList may_return_to_freelist) : m_may_return_to_freelist(may_return_to_freelist) { } PhysicalAddress PhysicalPage::paddr() const { return MM.get_physical_address(*this); } void PhysicalPage::free_this() const { auto paddr = MM.get_physical_address(*this); if (m_may_return_to_freelist == MayReturnToFreeList::Yes) { auto& this_as_freelist_entry = MM.get_physical_page_entry(paddr).freelist; this->~PhysicalPage(); // delete in place this_as_freelist_entry.next_index = -1; this_as_freelist_entry.prev_index = -1; MM.deallocate_physical_page(paddr); } else { this->~PhysicalPage(); // delete in place } } }