#ifndef PAGING_H
#define PAGING_H

#define PAGE_SIZE 4096
#define BITS_PER_ROW 64

#include <stdint.h>

void paging_init();

extern uint64_t hhdm_off;

#define PHYS_TO_VIRT(x) ((void*)((uintptr_t)(x) + hhdm_off))
#define VIRT_TO_PHYS(x) ((uintptr_t)(x) - hhdm_off)

// Stole it
#define ALIGN_UP(x, align)   (((x) + ((align) - 1)) & ~((align) - 1))
#define ALIGN_DOWN(x, align) ((x) & ~((align) - 1))

// Page entry special bits
// Bits set on a parent (directory, table) fall back to their children
#define PTE_PRESENT  (1ULL << 0)
#define PTE_WRITE    (1ULL << 1)
#define PTE_USER     (1ULL << 2)
#define PTE_HUGE     (1ULL << 7)
#define PTE_NOEXEC   (1ULL << 63)


#endif