paging.h

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#ifndef PAGING_H
#define PAGING_H
 
#include <stddef.h>
 
#define RUN_IN_ADDRESS_SPACE(addr_space,codeblock) do { \
  void* old_address_space=get_address_space(); \
  load_address_space(addr_space); \
  codeblock; \
  load_address_space(old_address_space); \
} while(0);
 
 
void map_pages(void* virt_addr_ptr,void* phys_addr_ptr,int num_pages,char usr,char wr);
void unmap_pages(void* start_virt,int num_pages, int free_phys);
void* alloc_pages(int num_pages);
void alloc_pages_virt(int num_pages,void* addr);
void dealloc_pages(int num_pages,void* addr);
 
void paging_init();
void* paging_new_address_space();
void load_address_space(void* address_space);
void* virt_to_phys(void* virt_addr);
void* find_free_pages(int num_pages);
 
void* get_address_space();
 
char is_page_present(size_t page);
 
#endif