arch/m68k/include/asm/page_no.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _M68K_PAGE_NO_H
   3 #define _M68K_PAGE_NO_H
   4
   5 #ifndef __ASSEMBLY__
   6
   7 extern unsigned long memory_start;
   8 extern unsigned long memory_end;
   9
  10 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
  11 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
  12
  13 #define clear_user_page(page, vaddr, pg)        clear_page(page)
  14 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  15
  16 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
  17         alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
  18 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
  19
  20 #define __pa(vaddr)             ((unsigned long)(vaddr))
  21 #define __va(paddr)             ((void *)((unsigned long)(paddr)))
  22
  23 #define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
  24 #define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
  25
  26 #define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
  27 #define page_to_virt(page)      __va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
  28
  29 #define pfn_to_page(pfn)        virt_to_page(pfn_to_virt(pfn))
  30 #define page_to_pfn(page)       virt_to_pfn(page_to_virt(page))
  31 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
  32
  33 #define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
  34                                 ((void *)(kaddr) < (void *)memory_end))
  35
  36 #endif /* __ASSEMBLY__ */
  37
  38 #endif /* _M68K_PAGE_NO_H */