1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _M68K_PAGE_NO_H
3 #define _M68K_PAGE_NO_H
4 
5 #ifndef __ASSEMBLY__
6 
7 extern unsigned long memory_start;
8 extern unsigned long memory_end;
9 
10 #define clear_page(page)	memset((page), 0, PAGE_SIZE)
11 #define copy_page(to,from)	memcpy((to), (from), PAGE_SIZE)
12 
13 #define clear_user_page(page, vaddr, pg)	clear_page(page)
14 #define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
15 
16 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
17 	alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
18 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
19 
20 #define __pa(vaddr)		((unsigned long)(vaddr))
21 #define __va(paddr)		((void *)((unsigned long)(paddr)))
22 
23 #define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
24 #define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
25 
26 #define virt_to_page(addr)	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
27 #define page_to_virt(page)	__va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
28 
29 #define pfn_to_page(pfn)	virt_to_page(pfn_to_virt(pfn))
30 #define page_to_pfn(page)	virt_to_pfn(page_to_virt(page))
31 #define pfn_valid(pfn)	        ((pfn) < max_mapnr)
32 
33 #define	virt_addr_valid(kaddr)	(((unsigned long)(kaddr) >= PAGE_OFFSET) && \
34 				((unsigned long)(kaddr) < memory_end))
35 
36 #endif /* __ASSEMBLY__ */
37 
38 #endif /* _M68K_PAGE_NO_H */
39