12 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _TOOLS_LINUX_PFN_H_3#define _TOOLS_LINUX_PFN_H_4 5#include <linux/mm.h>6 7#define PFN_UP(x) (((x) + PAGE_SIZE - 1) >> PAGE_SHIFT)8#define PFN_DOWN(x) ((x) >> PAGE_SHIFT)9#define PFN_PHYS(x) ((phys_addr_t)(x) << PAGE_SHIFT)10#define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT))11#endif12