linux/arch/m68k/include/asm/page_no.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _M68K_PAGE_NO_H
   3#define _M68K_PAGE_NO_H
   4
   5#ifndef __ASSEMBLY__
   6 
   7extern unsigned long memory_start;
   8extern 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_movable(vma, vaddr) \
  17        alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
  18#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
  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)  (((unsigned long)(kaddr) >= PAGE_OFFSET) && \
  34                                ((unsigned long)(kaddr) < memory_end))
  35
  36#endif /* __ASSEMBLY__ */
  37
  38#endif /* _M68K_PAGE_NO_H */
  39
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