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TOMOYO Linux Cross Reference
Linux/arch/m68k/include/asm/page_no.h

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  1 #ifndef _M68K_PAGE_NO_H
  2 #define _M68K_PAGE_NO_H
  3 
  4 #ifndef __ASSEMBLY__
  5  
  6 extern unsigned long memory_start;
  7 extern unsigned long memory_end;
  8 
  9 #define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
 10 #define free_user_page(page, addr)      free_page(addr)
 11 
 12 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
 13 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
 14 
 15 #define clear_user_page(page, vaddr, pg)        clear_page(page)
 16 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
 17 
 18 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
 19         alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
 20 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
 21 
 22 #define __pa(vaddr)             ((unsigned long)(vaddr))
 23 #define __va(paddr)             ((void *)(paddr))
 24 
 25 #define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
 26 #define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
 27 
 28 #define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 29 #define page_to_virt(page)      __va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
 30 
 31 #define pfn_to_page(pfn)        virt_to_page(pfn_to_virt(pfn))
 32 #define page_to_pfn(page)       virt_to_pfn(page_to_virt(page))
 33 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
 34 
 35 #define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
 36                                 ((void *)(kaddr) < (void *)memory_end))
 37 
 38 #endif /* __ASSEMBLY__ */
 39 
 40 #endif /* _M68K_PAGE_NO_H */
 41 

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