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#ifndef _LINUX_PFN_H_
#define _LINUX_PFN_H_
#define PFN_ALIGN(x) (((unsigned long long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
#define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
#define PFN_PHYS(x) ((unsigned long long)(x) << PAGE_SHIFT)
#endif
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