1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _M68K_PAGE_NO_H 3*4882a593Smuzhiyun #define _M68K_PAGE_NO_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun extern unsigned long memory_start; 8*4882a593Smuzhiyun extern unsigned long memory_end; 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #define clear_page(page) memset((page), 0, PAGE_SIZE) 11*4882a593Smuzhiyun #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #define clear_user_page(page, vaddr, pg) clear_page(page) 14*4882a593Smuzhiyun #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #define alloc_zeroed_user_highpage_movable(vma, vaddr) \ 17*4882a593Smuzhiyun alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr) 18*4882a593Smuzhiyun #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun #define __pa(vaddr) ((unsigned long)(vaddr)) 21*4882a593Smuzhiyun #define __va(paddr) ((void *)((unsigned long)(paddr))) 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 24*4882a593Smuzhiyun #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) 27*4882a593Smuzhiyun #define page_to_virt(page) __va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)) 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn)) 30*4882a593Smuzhiyun #define page_to_pfn(page) virt_to_pfn(page_to_virt(page)) 31*4882a593Smuzhiyun #define pfn_valid(pfn) ((pfn) < max_mapnr) 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ 34*4882a593Smuzhiyun ((void *)(kaddr) < (void *)memory_end)) 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */ 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun #endif /* _M68K_PAGE_NO_H */ 39