mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-01-25 18:52:22 -05:00
118cb391dd
This makes no functional difference, but it makes it clear that MemoryManager and PhysicalRegion take over the actual physical page represented by this PhysicalPage instance.
39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
#pragma once
|
|
|
|
#include <AK/Bitmap.h>
|
|
#include <AK/Retainable.h>
|
|
#include <AK/Retained.h>
|
|
#include <Kernel/PhysicalAddress.h>
|
|
#include <Kernel/VM/PhysicalPage.h>
|
|
|
|
class PhysicalRegion : public Retainable<PhysicalRegion> {
|
|
AK_MAKE_ETERNAL
|
|
|
|
public:
|
|
static Retained<PhysicalRegion> create(PhysicalAddress lower, PhysicalAddress upper);
|
|
~PhysicalRegion() {}
|
|
|
|
void expand(PhysicalAddress lower, PhysicalAddress upper);
|
|
unsigned finalize_capacity();
|
|
|
|
PhysicalAddress lower() const { return m_lower; }
|
|
PhysicalAddress upper() const { return m_upper; }
|
|
unsigned size() const { return m_pages; }
|
|
unsigned used() const { return m_used; }
|
|
unsigned free() const { return m_pages - m_used; }
|
|
bool contains(PhysicalPage& page) const { return page.paddr() >= m_lower && page.paddr() <= m_upper; }
|
|
|
|
RetainPtr<PhysicalPage> take_free_page(bool supervisor);
|
|
void return_page_at(PhysicalAddress addr);
|
|
void return_page(PhysicalPage&& page) { return_page_at(page.paddr()); }
|
|
|
|
private:
|
|
PhysicalRegion(PhysicalAddress lower, PhysicalAddress upper);
|
|
|
|
PhysicalAddress m_lower;
|
|
PhysicalAddress m_upper;
|
|
unsigned m_pages { 0 };
|
|
unsigned m_used { 0 };
|
|
unsigned m_last { 0 };
|
|
Bitmap m_bitmap;
|
|
};
|