summaryrefslogtreecommitdiffstats
path: root/arch/sparc/include/asm/page_32.h
blob: 4782600028364a4445d662cbaba9a2380b22f398 (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
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * page.h:  Various defines and such for MMU operations on the Sparc for
 *          the Linux kernel.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#ifndef _SPARC_PAGE_H
#define _SPARC_PAGE_H

#include <linux/const.h>

#define PAGE_SHIFT   12
#define PAGE_SIZE    (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK    (~(PAGE_SIZE-1))

#ifndef __ASSEMBLY__

#define clear_page(page)	 memset((void *)(page), 0, PAGE_SIZE)
#define copy_page(to,from) 	memcpy((void *)(to), (void *)(from), PAGE_SIZE)
#define clear_user_page(addr, vaddr, page)	\
	do { 	clear_page(addr);		\
		sparc_flush_page_to_ram(page);	\
	} while (0)
#define copy_user_page(to, from, vaddr, page)	\
	do {	copy_page(to, from);		\
		sparc_flush_page_to_ram(page);	\
	} while (0)

/* The following structure is used to hold the physical
 * memory configuration of the machine.  This is filled in
 * prom_meminit() and is later used by mem_init() to set up
 * mem_map[].  We statically allocate SPARC_PHYS_BANKS+1 of
 * these structs, this is arbitrary.  The entry after the
 * last valid one has num_bytes==0.
 */
struct sparc_phys_banks {
  unsigned long base_addr;
  unsigned long num_bytes;
};

#define SPARC_PHYS_BANKS 32

extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];

/* passing structs on the Sparc slow us down tremendously... */

/* #define STRICT_MM_TYPECHECKS */

#ifdef STRICT_MM_TYPECHECKS
/*
 * These are used to make use of C type-checking..
 */
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long iopte; } iopte_t;
typedef struct { unsigned long pmdv[16]; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long ctxd; } ctxd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct { unsigned long iopgprot; } iopgprot_t;

#define pte_val(x)	((x).pte)
#define iopte_val(x)	((x).iopte)
#define pmd_val(x)      ((x).pmdv[0])
#define pgd_val(x)	((x).pgd)
#define ctxd_val(x)	((x).ctxd)
#define pgprot_val(x)	((x).pgprot)
#define iopgprot_val(x)	((x).iopgprot)

#define __pte(x)	((pte_t) { (x) } )
#define __pmd(x)	((pmd_t) { { (x) }, })
#define __iopte(x)	((iopte_t) { (x) } )
#define __pgd(x)	((pgd_t) { (x) } )
#define __ctxd(x)	((ctxd_t) { (x) } )
#define __pgprot(x)	((pgprot_t) { (x) } )
#define __iopgprot(x)	((iopgprot_t) { (x) } )

#else
/*
 * .. while these make it easier on the compiler
 */
typedef unsigned long pte_t;
typedef unsigned long iopte_t;
typedef struct { unsigned long pmdv[16]; } pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long ctxd_t;
typedef unsigned long pgprot_t;
typedef unsigned long iopgprot_t;

#define pte_val(x)	(x)
#define iopte_val(x)	(x)
#define pmd_val(x)      ((x).pmdv[0])
#define pgd_val(x)	(x)
#define ctxd_val(x)	(x)
#define pgprot_val(x)	(x)
#define iopgprot_val(x)	(x)

#define __pte(x)	(x)
#define __pmd(x)	((pmd_t) { { (x) }, })
#define __iopte(x)	(x)
#define __pgd(x)	(x)
#define __ctxd(x)	(x)
#define __pgprot(x)	(x)
#define __iopgprot(x)	(x)

#endif

typedef struct page *pgtable_t;

#define TASK_UNMAPPED_BASE	0x50000000

#else /* !(__ASSEMBLY__) */

#define __pgprot(x)	(x)

#endif /* !(__ASSEMBLY__) */

#define PAGE_OFFSET	0xf0000000
#ifndef __ASSEMBLY__
extern unsigned long phys_base;
extern unsigned long pfn_base;
#endif
#define __pa(x)			((unsigned long)(x) - PAGE_OFFSET + phys_base)
#define __va(x)			((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))

#define virt_to_phys		__pa
#define phys_to_virt		__va

#define ARCH_PFN_OFFSET		(pfn_base)
#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)

#define pfn_valid(pfn)		(((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
#define virt_addr_valid(kaddr)	((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)

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

#endif /* _SPARC_PAGE_H */