File: /usr/src/linux/include/asm-sparc64/page.h
1 /* $Id: page.h,v 1.36 2000/08/10 01:04:53 davem Exp $ */
2
3 #ifndef _SPARC64_PAGE_H
4 #define _SPARC64_PAGE_H
5
6 #define PAGE_SHIFT 13
7 #ifndef __ASSEMBLY__
8 /* I have my suspicions... -DaveM */
9 #define PAGE_SIZE (1UL << PAGE_SHIFT)
10 #else
11 #define PAGE_SIZE (1 << PAGE_SHIFT)
12 #endif
13
14 #define PAGE_MASK (~(PAGE_SIZE-1))
15
16
17 #ifdef __KERNEL__
18
19 #ifndef __ASSEMBLY__
20
21 #define BUG() __builtin_trap()
22 #define PAGE_BUG(page) BUG()
23
24 extern void _clear_page(void *page);
25 extern void _copy_page(void *to, void *from);
26 #define clear_page(X) _clear_page((void *)(X))
27 #define copy_page(X,Y) _copy_page((void *)(X), (void *)(Y))
28 extern void clear_user_page(void *page, unsigned long vaddr);
29 extern void copy_user_page(void *to, void *from, unsigned long vaddr);
30
31 /* GROSS, defining this makes gcc pass these types as aggregates,
32 * and thus on the stack, turn this crap off... -DaveM
33 */
34
35 /* #define STRICT_MM_TYPECHECKS */
36
37 #ifdef STRICT_MM_TYPECHECKS
38 /* These are used to make use of C type-checking.. */
39 typedef struct { unsigned long pte; } pte_t;
40 typedef struct { unsigned long iopte; } iopte_t;
41 typedef struct { unsigned int pmd; } pmd_t;
42 typedef struct { unsigned int pgd; } pgd_t;
43 typedef struct { unsigned long ctxd; } ctxd_t;
44 typedef struct { unsigned long pgprot; } pgprot_t;
45 typedef struct { unsigned long iopgprot; } iopgprot_t;
46
47 #define pte_val(x) ((x).pte)
48 #define iopte_val(x) ((x).iopte)
49 #define pmd_val(x) ((unsigned long)(x).pmd)
50 #define pgd_val(x) ((unsigned long)(x).pgd)
51 #define ctxd_val(x) ((x).ctxd)
52 #define pgprot_val(x) ((x).pgprot)
53 #define iopgprot_val(x) ((x).iopgprot)
54
55 #define __pte(x) ((pte_t) { (x) } )
56 #define __iopte(x) ((iopte_t) { (x) } )
57 #define __pmd(x) ((pmd_t) { (x) } )
58 #define __pgd(x) ((pgd_t) { (x) } )
59 #define __ctxd(x) ((ctxd_t) { (x) } )
60 #define __pgprot(x) ((pgprot_t) { (x) } )
61 #define __iopgprot(x) ((iopgprot_t) { (x) } )
62
63 #else
64 /* .. while these make it easier on the compiler */
65 typedef unsigned long pte_t;
66 typedef unsigned long iopte_t;
67 typedef unsigned int pmd_t;
68 typedef unsigned int pgd_t;
69 typedef unsigned long ctxd_t;
70 typedef unsigned long pgprot_t;
71 typedef unsigned long iopgprot_t;
72
73 #define pte_val(x) (x)
74 #define iopte_val(x) (x)
75 #define pmd_val(x) ((unsigned long)(x))
76 #define pgd_val(x) ((unsigned long)(x))
77 #define ctxd_val(x) (x)
78 #define pgprot_val(x) (x)
79 #define iopgprot_val(x) (x)
80
81 #define __pte(x) (x)
82 #define __iopte(x) (x)
83 #define __pmd(x) (x)
84 #define __pgd(x) (x)
85 #define __ctxd(x) (x)
86 #define __pgprot(x) (x)
87 #define __iopgprot(x) (x)
88
89 #endif /* (STRICT_MM_TYPECHECKS) */
90
91 #define TASK_UNMAPPED_BASE ((current->thread.flags & SPARC_FLAG_32BIT) ? \
92 (0x0000000070000000UL) : (PAGE_OFFSET))
93
94 #endif /* !(__ASSEMBLY__) */
95
96 /* to align the pointer to the (next) page boundary */
97 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
98
99 #ifndef __ASSEMBLY__
100 /* Do prdele, look what happens to be in %g4... */
101 register unsigned long PAGE_OFFSET asm("g4");
102 #else
103 #define PAGE_OFFSET 0xFFFFF80000000000
104 #endif
105
106 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
107 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
108 #define virt_to_page(kaddr) (mem_map + ((__pa(kaddr)-phys_base) >> PAGE_SHIFT))
109 #define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
110
111 #define virt_to_phys __pa
112 #define phys_to_virt __va
113
114 #ifndef __ASSEMBLY__
115
116 /* The following structure is used to hold the physical
117 * memory configuration of the machine. This is filled in
118 * probe_memory() and is later used by mem_init() to set up
119 * mem_map[]. We statically allocate SPARC_PHYS_BANKS of
120 * these structs, this is arbitrary. The entry after the
121 * last valid one has num_bytes==0.
122 */
123
124 struct sparc_phys_banks {
125 unsigned long base_addr;
126 unsigned long num_bytes;
127 };
128
129 #define SPARC_PHYS_BANKS 32
130
131 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
132
133 /* Pure 2^n version of get_order */
134 extern __inline__ int get_order(unsigned long size)
135 {
136 int order;
137
138 size = (size-1) >> (PAGE_SHIFT-1);
139 order = -1;
140 do {
141 size >>= 1;
142 order++;
143 } while (size);
144 return order;
145 }
146
147 #endif /* !(__ASSEMBLY__) */
148
149 #endif /* !(__KERNEL__) */
150
151 #endif /* !(_SPARC64_PAGE_H) */
152