xref: /openbmc/linux/arch/m68k/include/asm/page_no.h (revision b6dcefde)
1 #ifndef _M68KNOMMU_PAGE_H
2 #define _M68KNOMMU_PAGE_H
3 
4 #include <linux/const.h>
5 
6 /* PAGE_SHIFT determines the page size */
7 
8 #define PAGE_SHIFT	(12)
9 #define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
10 #define PAGE_MASK	(~(PAGE_SIZE-1))
11 
12 #include <asm/setup.h>
13 
14 #ifndef __ASSEMBLY__
15 
16 #define get_user_page(vaddr)		__get_free_page(GFP_KERNEL)
17 #define free_user_page(page, addr)	free_page(addr)
18 
19 #define clear_page(page)	memset((page), 0, PAGE_SIZE)
20 #define copy_page(to,from)	memcpy((to), (from), PAGE_SIZE)
21 
22 #define clear_user_page(page, vaddr, pg)	clear_page(page)
23 #define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
24 
25 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
26 	alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
27 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
28 
29 /*
30  * These are used to make use of C type-checking..
31  */
32 typedef struct { unsigned long pte; } pte_t;
33 typedef struct { unsigned long pmd[16]; } pmd_t;
34 typedef struct { unsigned long pgd; } pgd_t;
35 typedef struct { unsigned long pgprot; } pgprot_t;
36 typedef struct page *pgtable_t;
37 
38 #define pte_val(x)	((x).pte)
39 #define pmd_val(x)	((&x)->pmd[0])
40 #define pgd_val(x)	((x).pgd)
41 #define pgprot_val(x)	((x).pgprot)
42 
43 #define __pte(x)	((pte_t) { (x) } )
44 #define __pmd(x)	((pmd_t) { (x) } )
45 #define __pgd(x)	((pgd_t) { (x) } )
46 #define __pgprot(x)	((pgprot_t) { (x) } )
47 
48 extern unsigned long memory_start;
49 extern unsigned long memory_end;
50 
51 #endif /* !__ASSEMBLY__ */
52 
53 #include <asm/page_offset.h>
54 
55 #define PAGE_OFFSET		(PAGE_OFFSET_RAW)
56 
57 #ifndef __ASSEMBLY__
58 
59 #define __pa(vaddr)		((unsigned long)(vaddr))
60 #define __va(paddr)		((void *)(paddr))
61 
62 #define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
63 #define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
64 
65 #define virt_to_page(addr)	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
66 #define page_to_virt(page)	((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
67 
68 #define pfn_to_page(pfn)	virt_to_page(pfn_to_virt(pfn))
69 #define page_to_pfn(page)	virt_to_pfn(page_to_virt(page))
70 #define pfn_valid(pfn)	        ((pfn) < max_mapnr)
71 
72 #define	virt_addr_valid(kaddr)	(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
73 				((void *)(kaddr) < (void *)memory_end))
74 
75 #endif /* __ASSEMBLY__ */
76 
77 #include <asm-generic/getorder.h>
78 
79 #endif /* _M68KNOMMU_PAGE_H */
80