release/src-rt-6.x.4708/linux/linux-2.6.36/include/linux/pfn.h

   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