1*b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 222a9835cSDave Hansen #ifndef _LINUX_PFN_H_ 322a9835cSDave Hansen #define _LINUX_PFN_H_ 422a9835cSDave Hansen 5947d0496SJeremy Fitzhardinge #ifndef __ASSEMBLY__ 6947d0496SJeremy Fitzhardinge #include <linux/types.h> 734c0fd54SDan Williams 834c0fd54SDan Williams /* 934c0fd54SDan Williams * pfn_t: encapsulates a page-frame number that is optionally backed 1034c0fd54SDan Williams * by memmap (struct page). Whether a pfn_t has a 'struct page' 1134c0fd54SDan Williams * backing is indicated by flags in the high bits of the value. 1234c0fd54SDan Williams */ 1334c0fd54SDan Williams typedef struct { 14db78c222SDan Williams u64 val; 1534c0fd54SDan Williams } pfn_t; 16947d0496SJeremy Fitzhardinge #endif 17947d0496SJeremy Fitzhardinge 1822a9835cSDave Hansen #define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK) 1922a9835cSDave Hansen #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) 2022a9835cSDave Hansen #define PFN_DOWN(x) ((x) >> PAGE_SHIFT) 21947d0496SJeremy Fitzhardinge #define PFN_PHYS(x) ((phys_addr_t)(x) << PAGE_SHIFT) 228f235d1aSChen Gang #define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT)) 2322a9835cSDave Hansen 2422a9835cSDave Hansen #endif 25