/* SPDX-License-Identifier: GPL-2.0 */
|
#ifndef _LINUX_PFN_H_
|
#define _LINUX_PFN_H_
|
|
#ifndef __ASSEMBLY__
|
#include <linux/types.h>
|
|
/*
|
* pfn_t: encapsulates a page-frame number that is optionally backed
|
* by memmap (struct page). Whether a pfn_t has a 'struct page'
|
* backing is indicated by flags in the high bits of the value.
|
*/
|
typedef struct {
|
u64 val;
|
} pfn_t;
|
#endif
|
|
#define PFN_ALIGN(x) (((unsigned 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) ((phys_addr_t)(x) << PAGE_SHIFT)
|
#define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT))
|
|
#endif
|
