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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $Id: page.h,v 1.55 2000/10/30 21:01:41 davem Exp $
2 * page.h: Various defines and such for MMU operations on the Sparc for
3 * the Linux kernel.
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8#ifndef _SPARC_PAGE_H
9#define _SPARC_PAGE_H
10
11#include <linux/config.h>
12#ifdef CONFIG_SUN4
13#define PAGE_SHIFT 13
14#else
15#define PAGE_SHIFT 12
16#endif
17#ifndef __ASSEMBLY__
18/* I have my suspicions... -DaveM */
19#define PAGE_SIZE (1UL << PAGE_SHIFT)
20#else
21#define PAGE_SIZE (1 << PAGE_SHIFT)
22#endif
23#define PAGE_MASK (~(PAGE_SIZE-1))
24
25#ifdef __KERNEL__
26
27#include <asm/btfixup.h>
28
29#ifndef __ASSEMBLY__
30
31#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
32#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
33#define clear_user_page(addr, vaddr, page) \
34 do { clear_page(addr); \
35 sparc_flush_page_to_ram(page); \
36 } while (0)
37#define copy_user_page(to, from, vaddr, page) \
38 do { copy_page(to, from); \
39 sparc_flush_page_to_ram(page); \
40 } while (0)
41
42/* The following structure is used to hold the physical
43 * memory configuration of the machine. This is filled in
44 * probe_memory() and is later used by mem_init() to set up
45 * mem_map[]. We statically allocate SPARC_PHYS_BANKS of
46 * these structs, this is arbitrary. The entry after the
47 * last valid one has num_bytes==0.
48 */
49
50struct sparc_phys_banks {
51 unsigned long base_addr;
52 unsigned long num_bytes;
53};
54
55#define SPARC_PHYS_BANKS 32
56
57extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
58
59/* Cache alias structure. Entry is valid if context != -1. */
60struct cache_palias {
61 unsigned long vaddr;
62 int context;
63};
64
65extern struct cache_palias *sparc_aliases;
66
67/* passing structs on the Sparc slow us down tremendously... */
68
69/* #define STRICT_MM_TYPECHECKS */
70
71#ifdef STRICT_MM_TYPECHECKS
72/*
73 * These are used to make use of C type-checking..
74 */
75typedef struct { unsigned long pte; } pte_t;
76typedef struct { unsigned long iopte; } iopte_t;
77typedef struct { unsigned long pmdv[16]; } pmd_t;
78typedef struct { unsigned long pgd; } pgd_t;
79typedef struct { unsigned long ctxd; } ctxd_t;
80typedef struct { unsigned long pgprot; } pgprot_t;
81typedef struct { unsigned long iopgprot; } iopgprot_t;
82
83#define pte_val(x) ((x).pte)
84#define iopte_val(x) ((x).iopte)
85#define pmd_val(x) ((x).pmdv[0])
86#define pgd_val(x) ((x).pgd)
87#define ctxd_val(x) ((x).ctxd)
88#define pgprot_val(x) ((x).pgprot)
89#define iopgprot_val(x) ((x).iopgprot)
90
91#define __pte(x) ((pte_t) { (x) } )
92#define __iopte(x) ((iopte_t) { (x) } )
93/* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */
94#define __pgd(x) ((pgd_t) { (x) } )
95#define __ctxd(x) ((ctxd_t) { (x) } )
96#define __pgprot(x) ((pgprot_t) { (x) } )
97#define __iopgprot(x) ((iopgprot_t) { (x) } )
98
99#else
100/*
101 * .. while these make it easier on the compiler
102 */
103typedef unsigned long pte_t;
104typedef unsigned long iopte_t;
105typedef struct { unsigned long pmdv[16]; } pmd_t;
106typedef unsigned long pgd_t;
107typedef unsigned long ctxd_t;
108typedef unsigned long pgprot_t;
109typedef unsigned long iopgprot_t;
110
111#define pte_val(x) (x)
112#define iopte_val(x) (x)
113#define pmd_val(x) ((x).pmdv[0])
114#define pgd_val(x) (x)
115#define ctxd_val(x) (x)
116#define pgprot_val(x) (x)
117#define iopgprot_val(x) (x)
118
119#define __pte(x) (x)
120#define __iopte(x) (x)
121/* #define __pmd(x) (x) */ /* XXX later */
122#define __pgd(x) (x)
123#define __ctxd(x) (x)
124#define __pgprot(x) (x)
125#define __iopgprot(x) (x)
126
127#endif
128
129extern unsigned long sparc_unmapped_base;
130
131BTFIXUPDEF_SETHI(sparc_unmapped_base)
132
133#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135#else /* !(__ASSEMBLY__) */
136
137#define __pgprot(x) (x)
138
139#endif /* !(__ASSEMBLY__) */
140
141/* to align the pointer to the (next) page boundary */
142#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
143
144#define PAGE_OFFSET 0xf0000000
145#ifndef __ASSEMBLY__
146extern unsigned long phys_base;
147extern unsigned long pfn_base;
148#endif
149#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base)
150#define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
151
152#define virt_to_phys __pa
153#define phys_to_virt __va
154
155#define pfn_to_page(pfn) (mem_map + ((pfn)-(pfn_base)))
156#define page_to_pfn(page) ((unsigned long)(((page) - mem_map) + pfn_base))
157#define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))
158
159#define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
160#define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
161
162#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
163 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
164
165#endif /* __KERNEL__ */
166
Stephen Rothwellfd4fd5a2005-09-03 15:54:30 -0700167#include <asm-generic/page.h>
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169#endif /* _SPARC_PAGE_H */