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Sam Ravnborgf5e706a2008-07-17 21:55:51 -07001/*
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
Sam Ravnborgf5e706a2008-07-17 21:55:51 -070011#define PAGE_SHIFT 12
Adrian Bunk5110bd22008-08-31 20:59:37 -070012
Sam Ravnborgf5e706a2008-07-17 21:55:51 -070013#ifndef __ASSEMBLY__
14/* I have my suspicions... -DaveM */
15#define PAGE_SIZE (1UL << PAGE_SHIFT)
16#else
17#define PAGE_SIZE (1 << PAGE_SHIFT)
18#endif
19#define PAGE_MASK (~(PAGE_SIZE-1))
20
21#include <asm/btfixup.h>
22
23#ifndef __ASSEMBLY__
24
25#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
26#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
27#define clear_user_page(addr, vaddr, page) \
28 do { clear_page(addr); \
29 sparc_flush_page_to_ram(page); \
30 } while (0)
31#define copy_user_page(to, from, vaddr, page) \
32 do { copy_page(to, from); \
33 sparc_flush_page_to_ram(page); \
34 } while (0)
35
36/* The following structure is used to hold the physical
37 * memory configuration of the machine. This is filled in
38 * prom_meminit() and is later used by mem_init() to set up
39 * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of
40 * these structs, this is arbitrary. The entry after the
41 * last valid one has num_bytes==0.
42 */
43struct sparc_phys_banks {
44 unsigned long base_addr;
45 unsigned long num_bytes;
46};
47
48#define SPARC_PHYS_BANKS 32
49
50extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
51
52/* Cache alias structure. Entry is valid if context != -1. */
53struct cache_palias {
54 unsigned long vaddr;
55 int context;
56};
57
58/* passing structs on the Sparc slow us down tremendously... */
59
60/* #define STRICT_MM_TYPECHECKS */
61
62#ifdef STRICT_MM_TYPECHECKS
63/*
64 * These are used to make use of C type-checking..
65 */
66typedef struct { unsigned long pte; } pte_t;
67typedef struct { unsigned long iopte; } iopte_t;
68typedef struct { unsigned long pmdv[16]; } pmd_t;
69typedef struct { unsigned long pgd; } pgd_t;
70typedef struct { unsigned long ctxd; } ctxd_t;
71typedef struct { unsigned long pgprot; } pgprot_t;
72typedef struct { unsigned long iopgprot; } iopgprot_t;
73
74#define pte_val(x) ((x).pte)
75#define iopte_val(x) ((x).iopte)
76#define pmd_val(x) ((x).pmdv[0])
77#define pgd_val(x) ((x).pgd)
78#define ctxd_val(x) ((x).ctxd)
79#define pgprot_val(x) ((x).pgprot)
80#define iopgprot_val(x) ((x).iopgprot)
81
82#define __pte(x) ((pte_t) { (x) } )
83#define __iopte(x) ((iopte_t) { (x) } )
84/* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */
85#define __pgd(x) ((pgd_t) { (x) } )
86#define __ctxd(x) ((ctxd_t) { (x) } )
87#define __pgprot(x) ((pgprot_t) { (x) } )
88#define __iopgprot(x) ((iopgprot_t) { (x) } )
89
90#else
91/*
92 * .. while these make it easier on the compiler
93 */
94typedef unsigned long pte_t;
95typedef unsigned long iopte_t;
96typedef struct { unsigned long pmdv[16]; } pmd_t;
97typedef unsigned long pgd_t;
98typedef unsigned long ctxd_t;
99typedef unsigned long pgprot_t;
100typedef unsigned long iopgprot_t;
101
102#define pte_val(x) (x)
103#define iopte_val(x) (x)
104#define pmd_val(x) ((x).pmdv[0])
105#define pgd_val(x) (x)
106#define ctxd_val(x) (x)
107#define pgprot_val(x) (x)
108#define iopgprot_val(x) (x)
109
110#define __pte(x) (x)
111#define __iopte(x) (x)
112/* #define __pmd(x) (x) */ /* XXX later */
113#define __pgd(x) (x)
114#define __ctxd(x) (x)
115#define __pgprot(x) (x)
116#define __iopgprot(x) (x)
117
118#endif
119
120typedef struct page *pgtable_t;
121
122extern unsigned long sparc_unmapped_base;
123
124BTFIXUPDEF_SETHI(sparc_unmapped_base)
125
126#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
127
128#else /* !(__ASSEMBLY__) */
129
130#define __pgprot(x) (x)
131
132#endif /* !(__ASSEMBLY__) */
133
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700134#define PAGE_OFFSET 0xf0000000
135#ifndef __ASSEMBLY__
136extern unsigned long phys_base;
137extern unsigned long pfn_base;
138#endif
139#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base)
140#define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
141
142#define virt_to_phys __pa
143#define phys_to_virt __va
144
145#define ARCH_PFN_OFFSET (pfn_base)
146#define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))
147
148#define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
149#define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
150
151#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
152 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
153
154#include <asm-generic/memory_model.h>
155#include <asm-generic/page.h>
156
157#endif /* _SPARC_PAGE_H */