page_no.h 1.3 KB

1234567891011121314151617181920212223242526272829303132333435363738
  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef _M68K_PAGE_NO_H
  3. #define _M68K_PAGE_NO_H
  4. #ifndef __ASSEMBLY__
  5. extern unsigned long memory_start;
  6. extern unsigned long memory_end;
  7. #define clear_page(page) memset((page), 0, PAGE_SIZE)
  8. #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
  9. #define clear_user_page(page, vaddr, pg) clear_page(page)
  10. #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
  11. #define alloc_zeroed_user_highpage_movable(vma, vaddr) \
  12. alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
  13. #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
  14. #define __pa(vaddr) ((unsigned long)(vaddr))
  15. #define __va(paddr) ((void *)((unsigned long)(paddr)))
  16. #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
  17. #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
  18. #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
  19. #define page_to_virt(page) __va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
  20. #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn))
  21. #define page_to_pfn(page) virt_to_pfn(page_to_virt(page))
  22. #define pfn_valid(pfn) ((pfn) < max_mapnr)
  23. #define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET) && \
  24. ((unsigned long)(kaddr) < memory_end))
  25. #endif /* __ASSEMBLY__ */
  26. #endif /* _M68K_PAGE_NO_H */