pfn.h 261 B

123456789
  1. #ifndef _LINUX_PFN_H_
  2. #define _LINUX_PFN_H_
  3. #define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
  4. #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
  5. #define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
  6. #define PFN_PHYS(x) ((x) << PAGE_SHIFT)
  7. #endif