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
44typedef struct { unsigned long pte; } pte_t;		/* page table entry */
45typedef struct { unsigned long pgd; } pgd_t;		/* PGD table entry */
46typedef struct { unsigned long pgprot; } pgprot_t;
47typedef 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
57extern unsigned long max_low_pfn;
58extern unsigned long min_low_pfn;
59extern 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