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- #ifndef _ASM_GENERIC_PAGE_H_
- #define _ASM_GENERIC_PAGE_H_
- /*
- * asm-generic/page.h
- * adapted from the Linux kernel's include/asm-generic/page.h
- *
- * Copyright (C) 2017, Red Hat Inc, Andrew Jones <drjones@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2.
- */
- #include <linux/const.h>
- #define PAGE_SHIFT 12
- #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
- #define PAGE_MASK (~(PAGE_SIZE-1))
- #ifndef __ASSEMBLY__
- #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
- #define __va(x) ((void *)((unsigned long) (x)))
- #define __pa(x) ((unsigned long) (x))
- #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
- #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
- #endif /* !__ASSEMBLY__ */
- #endif /* _ASM_GENERIC_PAGE_H_ */
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