forked from Bananymous/banan-os
53 lines
1.0 KiB
C++
53 lines
1.0 KiB
C++
#pragma once
|
|
|
|
#include <kernel/Memory/Types.h>
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
namespace Kernel
|
|
{
|
|
|
|
class PhysicalRange
|
|
{
|
|
public:
|
|
PhysicalRange(paddr_t, size_t);
|
|
paddr_t reserve_page();
|
|
void release_page(paddr_t);
|
|
|
|
paddr_t start() const { return m_paddr; }
|
|
paddr_t end() const { return m_paddr + m_size; }
|
|
bool contains(paddr_t addr) const { return m_paddr <= addr && addr < m_paddr + m_size; }
|
|
|
|
size_t usable_memory() const { return m_reservable_pages * PAGE_SIZE; }
|
|
|
|
size_t used_pages() const { return m_used_pages; }
|
|
size_t free_pages() const { return m_free_pages; }
|
|
|
|
private:
|
|
struct node
|
|
{
|
|
node* next;
|
|
node* prev;
|
|
};
|
|
|
|
paddr_t page_address(const node*) const;
|
|
node* node_address(paddr_t) const;
|
|
|
|
private:
|
|
paddr_t m_paddr { 0 };
|
|
vaddr_t m_vaddr { 0 };
|
|
size_t m_size { 0 };
|
|
|
|
uint64_t m_total_pages { 0 };
|
|
uint64_t m_reservable_pages { 0 };
|
|
uint64_t m_list_pages { 0 };
|
|
|
|
size_t m_used_pages { 0 };
|
|
size_t m_free_pages { 0 };
|
|
|
|
node* m_free_list { nullptr };
|
|
node* m_used_list { nullptr };
|
|
};
|
|
|
|
} |