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#ifndef I386_PAGING_H
#define I386_PAGING_H
#include <kernel/asm.h>
#include <kernel/multiboot.h>
#include <stdint.h>
#define PAGE_SIZE 4096
#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 PGROUNDUP(size) (((size)+PAGE_SIZE-1) & ~(PAGE_SIZE-1))
#define PGROUNDDN(size) (((size)) & ~(PAGE_SIZE-1))
#define GET_PADDR(x) (((uint32_t)(x)) - 0xC0000000)
#define GET_VADDR(x) (((uint32_t)(x)) + 0xC0000000)
#define GET_PDX(x) ((uintptr_t)(x) >> 22)
#define GET_PTX(x) (((uintptr_t)(x) >> 12) & 0x03FF)
uintptr_t get_physaddr(void *vaddr);
void paging_init(void);
uintptr_t init_page_directory(void);
void map_page(uintptr_t paddr, uintptr_t vaddr, uint32_t flags);
void unmap_page(uintptr_t vaddr);
void page_fault_handler(struct isr_frame *frame);
#endif
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