1 #ifndef _ASM_SCORE_PAGE_H
2 #define _ASM_SCORE_PAGE_H
3 
4 #include <linux/pfn.h>
5 #include <linux/const.h>
6 
7 /* PAGE_SHIFT determines the page size */
8 #define PAGE_SHIFT	(12)
9 #define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
10 #define PAGE_MASK	(~(PAGE_SIZE-1))
11 
12 #ifdef __KERNEL__
13 
14 #ifndef __ASSEMBLY__
15 
16 #define PAGE_UP(addr)	(((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
17 #define PAGE_DOWN(addr)	((addr)&(~((PAGE_SIZE)-1)))
18 
19 /* align addr on a size boundary - adjust address up/down if needed */
20 #define _ALIGN_UP(addr, size)	(((addr)+((size)-1))&(~((size)-1)))
21 #define _ALIGN_DOWN(addr, size)	((addr)&(~((size)-1)))
22 
23 /* align addr on a size boundary - adjust address up if needed */
24 #define _ALIGN(addr, size)	_ALIGN_UP(addr, size)
25 
26 /*
27  * PAGE_OFFSET -- the first address of the first page of memory. When not
28  * using MMU this corresponds to the first free page in physical memory (aligned
29  * on a page boundary).
30  */
31 #define PAGE_OFFSET		(0xA0000000UL)
32 
33 #define clear_page(pgaddr)			memset((pgaddr), 0, PAGE_SIZE)
34 #define copy_page(to, from)			memcpy((to), (from), PAGE_SIZE)
35 
36 #define clear_user_page(pgaddr, vaddr, page)	memset((pgaddr), 0, PAGE_SIZE)
37 #define copy_user_page(vto, vfrom, vaddr, topg) \
38 			memcpy((vto), (vfrom), PAGE_SIZE)
39 
40 /*
41  * These are used to make use of C type-checking..
42  */
43 
44 typedef struct { unsigned long pte; } pte_t;		/* page table entry */
45 typedef struct { unsigned long pgd; } pgd_t;		/* PGD table entry */
46 typedef struct { unsigned long pgprot; } pgprot_t;
47 typedef struct page *pgtable_t;
48 
49 #define pte_val(x)	((x).pte)
50 #define pgd_val(x)	((x).pgd)
51 #define pgprot_val(x)	((x).pgprot)
52 
53 #define __pte(x)	((pte_t) { (x) })
54 #define __pgd(x)	((pgd_t) { (x) })
55 #define __pgprot(x)	((pgprot_t) { (x) })
56 
57 extern unsigned long max_low_pfn;
58 extern unsigned long min_low_pfn;
59 extern unsigned long max_pfn;
60 
61 #define __pa(x)		((unsigned long)(x) - PAGE_OFFSET)
62 #define __va(x)		((void *)((unsigned long) (x) + PAGE_OFFSET))
63 
64 #define phys_to_pfn(phys)	(PFN_DOWN(phys))
65 #define pfn_to_phys(pfn)	(PFN_PHYS(pfn))
66 
67 #define virt_to_pfn(vaddr)	(phys_to_pfn((__pa(vaddr))))
68 #define pfn_to_virt(pfn)	__va(pfn_to_phys((pfn)))
69 
70 #define virt_to_page(vaddr)	(pfn_to_page(virt_to_pfn(vaddr)))
71 #define page_to_virt(page)	(pfn_to_virt(page_to_pfn(page)))
72 
73 #define page_to_phys(page)	(pfn_to_phys(page_to_pfn(page)))
74 #define page_to_bus(page)	(page_to_phys(page))
75 #define phys_to_page(paddr)	(pfn_to_page(phys_to_pfn(paddr)))
76 
77 #define pfn_valid(pfn)		(((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn))
78 
79 #define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
80 
81 #endif /* __ASSEMBLY__ */
82 
83 #define virt_addr_valid(vaddr)	(pfn_valid(virt_to_pfn(vaddr)))
84 
85 #endif /* __KERNEL__ */
86 
87 #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
88 				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
89 
90 #include <asm-generic/memory_model.h>
91 #include <asm-generic/getorder.h>
92 
93 #endif /* _ASM_SCORE_PAGE_H */
94