summaryrefslogtreecommitdiffstats
path: root/include/asm-sh64/page.h
blob: e1f7f5a41210f7421f64e2a1a31f92d7aa950f64 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
#ifndef __ASM_SH64_PAGE_H
#define __ASM_SH64_PAGE_H

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * include/asm-sh64/page.h
 *
 * Copyright (C) 2000, 2001  Paolo Alberelli
 * Copyright (C) 2003, 2004  Paul Mundt
 *
 * benedict.gaster@superh.com 19th, 24th July 2002.
 *
 * Modified to take account of enabling for D-CACHE support.
 *
 */

#include <linux/config.h>

/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT	12
#ifdef __ASSEMBLY__
#define PAGE_SIZE	4096
#else
#define PAGE_SIZE	(1UL << PAGE_SHIFT)
#endif
#define PAGE_MASK	(~(PAGE_SIZE-1))
#define PTE_MASK	PAGE_MASK

#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
#define HPAGE_SHIFT	16
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
#define HPAGE_SHIFT	20
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB)
#define HPAGE_SHIFT	29
#endif

#ifdef CONFIG_HUGETLB_PAGE
#define HPAGE_SIZE		(1UL << HPAGE_SHIFT)
#define HPAGE_MASK		(~(HPAGE_SIZE-1))
#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT-PAGE_SHIFT)
#endif

#ifdef __KERNEL__
#ifndef __ASSEMBLY__

extern struct page *mem_map;
extern void sh64_page_clear(void *page);
extern void sh64_page_copy(void *from, void *to);

#define clear_page(page)               sh64_page_clear(page)
#define copy_page(to,from)             sh64_page_copy(from, to)

#if defined(CONFIG_DCACHE_DISABLED)

#define clear_user_page(page, vaddr, pg)	clear_page(page)
#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)

#else

extern void clear_user_page(void *to, unsigned long address, struct page *pg);
extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);

#endif /* defined(CONFIG_DCACHE_DISABLED) */

/*
 * These are used to make use of C type-checking..
 */
typedef struct { unsigned long long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;

#define pte_val(x)	((x).pte)
#define pmd_val(x)	((x).pmd)
#define pgd_val(x)	((x).pgd)
#define pgprot_val(x)	((x).pgprot)

#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x)	((pgprot_t) { (x) } )

#endif /* !__ASSEMBLY__ */

/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)

/*
 * Kconfig defined.
 */
#define __MEMORY_START		(CONFIG_MEMORY_START)
#define PAGE_OFFSET		(CONFIG_CACHED_MEMORY_OFFSET)

#define __pa(x)			((unsigned long)(x)-PAGE_OFFSET)
#define __va(x)			((void *)((unsigned long)(x)+PAGE_OFFSET))
#define MAP_NR(addr)		((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT)
#define VALID_PAGE(page)	((page - mem_map) < max_mapnr)

#define phys_to_page(phys)	(mem_map + (((phys) - __MEMORY_START) >> PAGE_SHIFT))
#define page_to_phys(page)	(((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)

/* PFN start number, because of __MEMORY_START */
#define PFN_START		(__MEMORY_START >> PAGE_SHIFT)

#define pfn_to_page(pfn)	(mem_map + (pfn) - PFN_START)
#define page_to_pfn(page)	((unsigned long)((page) - mem_map) + PFN_START)
#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define pfn_valid(pfn)		(((pfn) - PFN_START) < max_mapnr)
#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#ifndef __ASSEMBLY__

/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
	int order;

	size = (size-1) >> (PAGE_SHIFT-1);
	order = -1;
	do {
		size >>= 1;
		order++;
	} while (size);
	return order;
}

#endif

#endif /* __KERNEL__ */

#endif /* __ASM_SH64_PAGE_H */