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#ifndef I386_PAGING_H
#define I386_PAGING_H
#include <kernel/isr.h>
#include <stdint.h>
#define PD_PRES 0x0001
#define PD_RW 0x0002
#define PD_USR 0x0004
#define PD_PWT 0x0008
#define PD_PCD 0x0010
#define PD_ACC 0x0020
#define PD_DIRTY 0x0040
#define PD_PS 0x0080
#define PD_GLOB 0x0100
#define PD_PAT 0x1000
#define ERR_PRESENT 0x1
#define ERR_RW 0x2
#define ERR_USER 0x4
#define ERR_RESERVED 0x8
#define ERR_INST 0x10
#define BLOCK_SIZE 4096
#define BLOCKS_PER_BUCKET 8
#define BLOCK_ALIGN(addr) (((addr) & 0xFFFFF000) + 0x1000)
#define SETBIT(x,i) x[i/BLOCKS_PER_BUCKET] = x[i/BLOCKS_PER_BUCKET] | (1 << (i % BLOCKS_PER_BUCKET))
#define CLEARBIT(x,i) x[i/BLOCKS_PER_BUCKET] = x[i/BLOCKS_PER_BUCKET] & (~(1 << (i % BLOCKS_PER_BUCKET)))
#define ISSET(x,i) ((x[i/BLOCKS_PER_BUCKET] >> (i % BLOCKS_PER_BUCKET)) & 0x1)
#define GETBUCKET(x,i) (*((uint32_t*)&x[i/32]))
#define PAGE_SIZE 4096
struct page_frame {
int used;
uint32_t addr;
};
void load_page_dir(uint32_t pd_addr);
void enable_paging(void);
void paging_init();
void page_fault_handler(struct isr_frame *frame);
uint32_t get_paddr(uint32_t vaddr);
uint32_t get_vaddr(uint32_t paddr);
void map_page(uint32_t paddr, uint32_t vaddr, uint32_t flags);
void unmap_page(uint32_t vaddr);
#endif
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