mirror of
https://github.com/RGBCube/serenity
synced 2025-05-14 07:54:58 +00:00
11eee67b85
Until now, our kernel has reimplemented a number of AK classes to provide automatic internal locking: - RefPtr - NonnullRefPtr - WeakPtr - Weakable This patch renames the Kernel classes so that they can coexist with the original AK classes: - RefPtr => LockRefPtr - NonnullRefPtr => NonnullLockRefPtr - WeakPtr => LockWeakPtr - Weakable => LockWeakable The goal here is to eventually get rid of the Lock* classes in favor of using external locking.
50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
/*
|
|
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
|
|
* Copyright (c) 2018-2022, James Mintram <me@jamesrm.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Singleton.h>
|
|
|
|
#include <Kernel/Memory/PageDirectory.h>
|
|
#include <Kernel/Thread.h>
|
|
|
|
namespace Kernel::Memory {
|
|
|
|
static Singleton<IntrusiveRedBlackTree<&PageDirectory::m_tree_node>> s_cr3_map;
|
|
|
|
static IntrusiveRedBlackTree<&PageDirectory::m_tree_node>& cr3_map()
|
|
{
|
|
VERIFY_INTERRUPTS_DISABLED();
|
|
return *s_cr3_map;
|
|
}
|
|
|
|
void PageDirectory::register_page_directory(PageDirectory* directory)
|
|
{
|
|
cr3_map().insert(directory->cr3(), *directory);
|
|
}
|
|
|
|
void PageDirectory::deregister_page_directory(PageDirectory* directory)
|
|
{
|
|
cr3_map().remove(directory->cr3());
|
|
}
|
|
|
|
LockRefPtr<PageDirectory> PageDirectory::find_current()
|
|
{
|
|
SpinlockLocker lock(s_mm_lock);
|
|
return cr3_map().find(read_cr3());
|
|
}
|
|
|
|
void activate_kernel_page_directory(PageDirectory const& pgd)
|
|
{
|
|
write_cr3(pgd.cr3());
|
|
}
|
|
|
|
void activate_page_directory(PageDirectory const& pgd, Thread* current_thread)
|
|
{
|
|
current_thread->regs().cr3 = pgd.cr3();
|
|
write_cr3(pgd.cr3());
|
|
}
|
|
|
|
}
|