aboutsummaryrefslogtreecommitdiff
path: root/arch/microblaze/include/asm/page.h
blob: 7238dcfcc5174af979475f75013608f1f8558158 (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
138
139
140
/*
 * Copyright (C) 2008 Michal Simek
 * Copyright (C) 2008 PetaLogix
 * Copyright (C) 2006 Atmark Techno, Inc.
 * Changes for MMU support:
 *    Copyright (C) 2007 Xilinx, Inc.  All rights reserved.
 *
 * 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.
 */

#ifndef _ASM_MICROBLAZE_PAGE_H
#define _ASM_MICROBLAZE_PAGE_H

#include <linux/pfn.h>
#include <asm/setup.h>

/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT	(12)
#define PAGE_SIZE	(1UL << PAGE_SHIFT)
#define PAGE_MASK	(~(PAGE_SIZE-1))

#ifdef __KERNEL__

#ifndef __ASSEMBLY__

#define PAGE_UP(addr)	(((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
#define PAGE_DOWN(addr)	((addr)&(~((PAGE_SIZE)-1)))

/* align addr on a size boundary - adjust address up/down if needed */
#define _ALIGN_UP(addr, size)	(((addr)+((size)-1))&(~((size)-1)))
#define _ALIGN_DOWN(addr, size)	((addr)&(~((size)-1)))

/* align addr on a size boundary - adjust address up if needed */
#define _ALIGN(addr, size)	_ALIGN_UP(addr, size)

/*
 * PAGE_OFFSET -- the first address of the first page of memory. When not
 * using MMU this corresponds to the first free page in physical memory (aligned
 * on a page boundary).
 */
extern unsigned int __page_offset;
#define PAGE_OFFSET __page_offset

#define copy_page(to, from)			memcpy((to), (from), PAGE_SIZE)
#define get_user_page(vaddr)			__get_free_page(GFP_KERNEL)
#define free_user_page(page, addr)		free_page(addr)

#define clear_page(pgaddr)			memset((pgaddr), 0, PAGE_SIZE)


#define clear_user_page(pgaddr, vaddr, page)	memset((pgaddr), 0, PAGE_SIZE)
#define copy_user_page(vto, vfrom, vaddr, topg) \
			memcpy((vto), (vfrom), PAGE_SIZE)

/*
 * These are used to make use of C type-checking..
 */
typedef struct page *pgtable_t;
typedef struct { unsigned long	pte; }		pte_t;
typedef struct { unsigned long	pgprot; }	pgprot_t;
typedef struct { unsigned long	ste[64]; }	pmd_t;
typedef struct { pmd_t		pue[1]; }	pud_t;
typedef struct { pud_t		pge[1]; }	pgd_t;


#define pte_val(x)	((x).pte)
#define pgprot_val(x)	((x).pgprot)
#define pmd_val(x)	((x).ste[0])
#define pud_val(x)	((x).pue[0])
#define pgd_val(x)	((x).pge[0])

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

/**
 * Conversions for virtual address, physical address, pfn, and struct
 * page are defined in the following files.
 *
 * virt -+
 *	 | asm-microblaze/page.h
 * phys -+
 *	 | linux/pfn.h
 *  pfn -+
 *	 | asm-generic/memory_model.h
 * page -+
 *
 */

extern unsigned long max_low_pfn;
extern unsigned long min_low_pfn;
extern unsigned long max_pfn;

#define __pa(vaddr)		((unsigned long) (vaddr))
#define __va(paddr)		((void *) (paddr))

#define phys_to_pfn(phys)	(PFN_DOWN(phys))
#define pfn_to_phys(pfn)	(PFN_PHYS(pfn))

#define virt_to_pfn(vaddr)	(phys_to_pfn((__pa(vaddr))))
#define pfn_to_virt(pfn)	__va(pfn_to_phys((pfn)))

#define virt_to_page(vaddr)	(pfn_to_page(virt_to_pfn(vaddr)))
#define page_to_virt(page)	(pfn_to_virt(page_to_pfn(page)))

#define page_to_phys(page)	(pfn_to_phys(page_to_pfn(page)))
#define page_to_bus(page)	(page_to_phys(page))
#define phys_to_page(paddr)	(pfn_to_page(phys_to_pfn(paddr)))

extern unsigned int memory_start;
extern unsigned int memory_end;
extern unsigned int memory_size;

#define pfn_valid(pfn)		((pfn) >= min_low_pfn && (pfn) < max_mapnr)

#define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)

#else
#define tophys(rd, rs)	(addik rd, rs, 0)
#define tovirt(rd, rs)	(addik rd, rs, 0)
#endif /* __ASSEMBLY__ */

#define virt_addr_valid(vaddr)	(pfn_valid(virt_to_pfn(vaddr)))

/* Convert between virtual and physical address for MMU.  */
/* Handle MicroBlaze processor with virtual memory.  */
#define __virt_to_phys(addr)	addr
#define __phys_to_virt(addr)	addr

#define TOPHYS(addr)  __virt_to_phys(addr)

#endif /* __KERNEL__ */

#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>

#endif /* _ASM_MICROBLAZE_PAGE_H */