#ifndef MM_H
#define MM_H MM_H

#include "hos_types.h"
#include "hos_defines.h"
#include "multiboot.h"

typedef u32_t pagedirectory_entry_t;

#define NUM_PAGETABLE_ENTRIES (PAGE_SIZE / sizeof(pagedirectory_entry_t))

typedef pagedirectory_entry_t
    pagedirectory_t[NUM_PAGETABLE_ENTRIES];

extern pagedirectory_t page_directory;

typedef struct
{
    u64_t   base;
    u64_t   length;
} mm_mem_range_t;

void mm_record_mmap_entry(mb_mmap_t * mmap);
void mm_bootstrap();

int mm_map(u32_t virtual_address, u32_t physical_address,
           u32_t user_mode, u32_t writable);

u32_t mm_page_alloc();

#define set_cr3(address) \
    __asm__ __volatile__ ("movl %0, %%cr3" : : "r" (address));

#endif