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 vma_alloc_zeroed_movable_folio(vma, vaddr) \
17 vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
18
19 #define __pa(vaddr) ((unsigned long)(vaddr))
20 #define __va(paddr) ((void *)((unsigned long)(paddr)))
21
22 static inline unsigned long virt_to_pfn(const void *kaddr)
23 {
24 return __pa(kaddr) >> PAGE_SHIFT;
25 }
26
27 static inline void *pfn_to_virt(unsigned long pfn)
28 {
29 return __va(pfn << PAGE_SHIFT);
30 }
31
32 #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
33 #define page_to_virt(page) __va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
34
35 #define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET) && \
36 ((unsigned long)(kaddr) < memory_end))
37
38 #define ARCH_PFN_OFFSET PHYS_PFN(PAGE_OFFSET_RAW)
39
40 #endif /* __ASSEMBLY__ */
41
42 #endif /* _M68K_PAGE_NO_H */
43
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