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

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _LINUX_PFN_H_
 3#define _LINUX_PFN_H_
 4
 5#ifndef __ASSEMBLY__
 6#include <linux/types.h>
 7
 8/*
 9 * pfn_t: encapsulates a page-frame number that is optionally backed
10 * by memmap (struct page).  Whether a pfn_t has a 'struct page'
11 * backing is indicated by flags in the high bits of the value.
12 */
13typedef struct {
14	u64 val;
15} pfn_t;
16#endif
17
18#define PFN_ALIGN(x)	(((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
19#define PFN_UP(x)	(((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
20#define PFN_DOWN(x)	((x) >> PAGE_SHIFT)
21#define PFN_PHYS(x)	((phys_addr_t)(x) << PAGE_SHIFT)
22#define PHYS_PFN(x)	((unsigned long)((x) >> PAGE_SHIFT))
23
24#endif