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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
#ifndef _PPC_PAGE_H
#define _PPC_PAGE_H
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
/*
* Subtle: this is an int (not an unsigned long) and so it
* gets extended to 64 bits the way want (i.e. with 1s). -- paulus
*/
#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
#ifdef __KERNEL__
#include <linux/config.h>
/* This must match what is in arch/ppc/Makefile */
#define PAGE_OFFSET CONFIG_KERNEL_START
#define KERNELBASE PAGE_OFFSET
#ifndef __ASSEMBLY__
/*
* The basic type of a PTE - 64 bits for those CPUs with > 32 bit
* physical addressing. For now this just the IBM PPC440.
*/
#ifdef CONFIG_PTE_64BIT
typedef unsigned long long pte_basic_t;
#define PTE_SHIFT (PAGE_SHIFT - 3) /* 512 ptes per page */
#define PTE_FMT "%16Lx"
#else
typedef unsigned long pte_basic_t;
#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */
#define PTE_FMT "%.8lx"
#endif
/* align addr on a size boundary - adjust address up/down if needed */
#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
#define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1)))
/* align addr on a size boundary - adjust address up if needed */
#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
#undef STRICT_MM_TYPECHECKS
#ifdef STRICT_MM_TYPECHECKS
/*
* These are used to make use of C type-checking..
*/
typedef struct { pte_basic_t pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
#define pte_val(x) ((x).pte)
#define pmd_val(x) ((x).pmd)
#define pgd_val(x) ((x).pgd)
#define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
#else
/*
* .. while these make it easier on the compiler
*/
typedef pte_basic_t pte_t;
typedef unsigned long pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long pgprot_t;
#define pte_val(x) (x)
#define pmd_val(x) (x)
#define pgd_val(x) (x)
#define pgprot_val(x) (x)
#define __pte(x) (x)
#define __pmd(x) (x)
#define __pgd(x) (x)
#define __pgprot(x) (x)
#endif
struct page;
extern void clear_pages(void *page, int order);
static inline void clear_page(void *page) { clear_pages(page, 0); }
extern void copy_page(void *to, void *from);
extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
extern void copy_user_page(void *to, void *from, unsigned long vaddr,
struct page *pg);
#ifndef CONFIG_APUS
#define PPC_MEMSTART 0
#define PPC_PGSTART 0
#define PPC_MEMOFFSET PAGE_OFFSET
#else
extern unsigned long ppc_memstart;
extern unsigned long ppc_pgstart;
extern unsigned long ppc_memoffset;
#define PPC_MEMSTART ppc_memstart
#define PPC_PGSTART ppc_pgstart
#define PPC_MEMOFFSET ppc_memoffset
#endif
#if defined(CONFIG_APUS) && !defined(MODULE)
/* map phys->virtual and virtual->phys for RAM pages */
static inline unsigned long ___pa(unsigned long v)
{
unsigned long p;
asm volatile ("1: addis %0, %1, %2;"
".section \".vtop_fixup\",\"aw\";"
".align 1;"
".long 1b;"
".previous;"
: "=r" (p)
: "b" (v), "K" (((-PAGE_OFFSET) >> 16) & 0xffff));
return p;
}
static inline void* ___va(unsigned long p)
{
unsigned long v;
asm volatile ("1: addis %0, %1, %2;"
".section \".ptov_fixup\",\"aw\";"
".align 1;"
".long 1b;"
".previous;"
: "=r" (v)
: "b" (p), "K" (((PAGE_OFFSET) >> 16) & 0xffff));
return (void*) v;
}
#else
#define ___pa(vaddr) ((vaddr)-PPC_MEMOFFSET)
#define ___va(paddr) ((paddr)+PPC_MEMOFFSET)
#endif
extern int page_is_ram(unsigned long pfn);
#define __pa(x) ___pa((unsigned long)(x))
#define __va(x) ((void *)(___va((unsigned long)(x))))
#define pfn_to_page(pfn) (mem_map + ((pfn) - PPC_PGSTART))
#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PPC_PGSTART)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
#define pfn_valid(pfn) (((pfn) - PPC_PGSTART) < max_mapnr)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int lz;
size = (size-1) >> PAGE_SHIFT;
asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
return 32 - lz;
}
#endif /* __ASSEMBLY__ */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#endif /* __KERNEL__ */
#endif /* _PPC_PAGE_H */
|
