linux/include/linux/pfn.h
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   1#ifndef _LINUX_PFN_H_
   2#define _LINUX_PFN_H_
   3
   4#ifndef __ASSEMBLY__
   5#include <linux/types.h>
   6#endif
   7
   8#define PFN_ALIGN(x)    (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
   9#define PFN_UP(x)       (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
  10#define PFN_DOWN(x)     ((x) >> PAGE_SHIFT)
  11#define PFN_PHYS(x)     ((phys_addr_t)(x) << PAGE_SHIFT)
  12
  13#endif
  14
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