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