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Kernel: Rename Kernel/VM/ to Kernel/Memory/

Browse source 
This directory isn't just about virtual memory, it's about all kinds
of memory management.
This commit is contained in:
Andreas Kling 2021-08-06 10:45:34 +02:00
parent 4e8e1b7b3a
commit a1d7ebf85a
117 changed files with 207 additions and 204 deletions
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43
Kernel/Memory/PhysicalPage.cpp Normal file
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@ -0,0 +1,43 @@
/*
* 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 {
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()
{
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
}
}
}