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-rw-r--r--arch/sparc/include/asm/page_32.h160
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diff --git a/arch/sparc/include/asm/page_32.h b/arch/sparc/include/asm/page_32.h
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1/*
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#ifdef CONFIG_SUN4
12#define PAGE_SHIFT 13
13#else
14#define PAGE_SHIFT 12
15#endif
16#ifndef __ASSEMBLY__
17/* I have my suspicions... -DaveM */
18#define PAGE_SIZE (1UL << PAGE_SHIFT)
19#else
20#define PAGE_SIZE (1 << PAGE_SHIFT)
21#endif
22#define PAGE_MASK (~(PAGE_SIZE-1))
23
24#include <asm/btfixup.h>
25
26#ifndef __ASSEMBLY__
27
28#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
29#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
30#define clear_user_page(addr, vaddr, page) \
31 do { clear_page(addr); \
32 sparc_flush_page_to_ram(page); \
33 } while (0)
34#define copy_user_page(to, from, vaddr, page) \
35 do { copy_page(to, from); \
36 sparc_flush_page_to_ram(page); \
37 } while (0)
38
39/* The following structure is used to hold the physical
40 * memory configuration of the machine. This is filled in
41 * prom_meminit() and is later used by mem_init() to set up
42 * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of
43 * these structs, this is arbitrary. The entry after the
44 * last valid one has num_bytes==0.
45 */
46struct sparc_phys_banks {
47 unsigned long base_addr;
48 unsigned long num_bytes;
49};
50
51#define SPARC_PHYS_BANKS 32
52
53extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
54
55/* Cache alias structure. Entry is valid if context != -1. */
56struct cache_palias {
57 unsigned long vaddr;
58 int context;
59};
60
61/* passing structs on the Sparc slow us down tremendously... */
62
63/* #define STRICT_MM_TYPECHECKS */
64
65#ifdef STRICT_MM_TYPECHECKS
66/*
67 * These are used to make use of C type-checking..
68 */
69typedef struct { unsigned long pte; } pte_t;
70typedef struct { unsigned long iopte; } iopte_t;
71typedef struct { unsigned long pmdv[16]; } pmd_t;
72typedef struct { unsigned long pgd; } pgd_t;
73typedef struct { unsigned long ctxd; } ctxd_t;
74typedef struct { unsigned long pgprot; } pgprot_t;
75typedef struct { unsigned long iopgprot; } iopgprot_t;
76
77#define pte_val(x) ((x).pte)
78#define iopte_val(x) ((x).iopte)
79#define pmd_val(x) ((x).pmdv[0])
80#define pgd_val(x) ((x).pgd)
81#define ctxd_val(x) ((x).ctxd)
82#define pgprot_val(x) ((x).pgprot)
83#define iopgprot_val(x) ((x).iopgprot)
84
85#define __pte(x) ((pte_t) { (x) } )
86#define __iopte(x) ((iopte_t) { (x) } )
87/* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */
88#define __pgd(x) ((pgd_t) { (x) } )
89#define __ctxd(x) ((ctxd_t) { (x) } )
90#define __pgprot(x) ((pgprot_t) { (x) } )
91#define __iopgprot(x) ((iopgprot_t) { (x) } )
92
93#else
94/*
95 * .. while these make it easier on the compiler
96 */
97typedef unsigned long pte_t;
98typedef unsigned long iopte_t;
99typedef struct { unsigned long pmdv[16]; } pmd_t;
100typedef unsigned long pgd_t;
101typedef unsigned long ctxd_t;
102typedef unsigned long pgprot_t;
103typedef unsigned long iopgprot_t;
104
105#define pte_val(x) (x)
106#define iopte_val(x) (x)
107#define pmd_val(x) ((x).pmdv[0])
108#define pgd_val(x) (x)
109#define ctxd_val(x) (x)
110#define pgprot_val(x) (x)
111#define iopgprot_val(x) (x)
112
113#define __pte(x) (x)
114#define __iopte(x) (x)
115/* #define __pmd(x) (x) */ /* XXX later */
116#define __pgd(x) (x)
117#define __ctxd(x) (x)
118#define __pgprot(x) (x)
119#define __iopgprot(x) (x)
120
121#endif
122
123typedef struct page *pgtable_t;
124
125extern unsigned long sparc_unmapped_base;
126
127BTFIXUPDEF_SETHI(sparc_unmapped_base)
128
129#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
130
131#else /* !(__ASSEMBLY__) */
132
133#define __pgprot(x) (x)
134
135#endif /* !(__ASSEMBLY__) */
136
137#define PAGE_OFFSET 0xf0000000
138#ifndef __ASSEMBLY__
139extern unsigned long phys_base;
140extern unsigned long pfn_base;
141#endif
142#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base)
143#define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
144
145#define virt_to_phys __pa
146#define phys_to_virt __va
147
148#define ARCH_PFN_OFFSET (pfn_base)
149#define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))
150
151#define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
152#define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
153
154#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
155 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
156
157#include <asm-generic/memory_model.h>
158#include <asm-generic/page.h>
159
160#endif /* _SPARC_PAGE_H */