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
|
#ifndef _PARISC_PAGE_H
#define _PARISC_PAGE_H
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifdef __KERNEL__
#include <linux/config.h>
#ifndef __ASSEMBLY__
#include <asm/types.h>
#include <asm/cache.h>
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
#define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
struct page;
extern void purge_kernel_dcache_page(unsigned long);
extern void copy_user_page_asm(void *to, void *from);
extern void clear_user_page_asm(void *page, unsigned long vaddr);
static inline void
copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg)
{
copy_user_page_asm(vto, vfrom);
flush_kernel_dcache_page(vto);
/* XXX: ppc flushes icache too, should we? */
}
static inline void
clear_user_page(void *page, unsigned long vaddr, struct page *pg)
{
purge_kernel_dcache_page((unsigned long)page);
clear_user_page_asm(page, vaddr);
}
/*
* These are used to make use of C type-checking..
*/
#ifdef __LP64__
typedef struct { unsigned long pte; } pte_t;
#else
typedef struct {
unsigned long pte;
unsigned long flags;
} pte_t;
#endif
/* NOTE: even on 64 bits, these entries are __u32 because we allocate
* the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
typedef struct { __u32 pmd; } pmd_t;
typedef struct { __u32 pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
#define pte_val(x) ((x).pte)
#ifdef __LP64__
#define pte_flags(x) (*(__u32 *)&((x).pte))
#else
#define pte_flags(x) ((x).flags)
#endif
/* These do not work lvalues, so make sure we don't use them as such. */
#define pmd_val(x) ((x).pmd + 0)
#define pgd_val(x) ((x).pgd + 0)
#define pgprot_val(x) ((x).pgprot)
#define __pmd_val_set(x,n) (x).pmd = (n)
#define __pgd_val_set(x,n) (x).pgd = (n)
#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
typedef struct __physmem_range {
unsigned long start_pfn;
unsigned long pages; /* PAGE_SIZE pages */
} physmem_range_t;
extern physmem_range_t pmem_ranges[];
extern int npmem_ranges;
#endif /* !__ASSEMBLY__ */
/* WARNING: The definitions below must match exactly to sizeof(pte_t)
* etc
*/
#ifdef __LP64__
#define BITS_PER_PTE_ENTRY 3
#define BITS_PER_PMD_ENTRY 2
#define BITS_PER_PGD_ENTRY 2
#else
#define BITS_PER_PTE_ENTRY 3
#define BITS_PER_PMD_ENTRY 2
#define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
#endif
#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
#define LINUX_GATEWAY_SPACE 0
/* This governs the relationship between virtual and physical addresses.
* If you alter it, make sure to take care of our various fixed mapping
* segments in fixmap.h */
#define __PAGE_OFFSET (0x10000000)
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
/* The size of the gateway page (we leave lots of room for expansion) */
#define GATEWAY_PAGE_SIZE 0x4000
/* The start of the actual kernel binary---used in vmlinux.lds.S
* Leave some space after __PAGE_OFFSET for detecting kernel null
* ptr derefs */
#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
/* These macros don't work for 64-bit C code -- don't allow in C at all */
#ifdef __ASSEMBLY__
# define PA(x) ((x)-__PAGE_OFFSET)
# define VA(x) ((x)+__PAGE_OFFSET)
#endif
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
#ifndef CONFIG_DISCONTIGMEM
#define pfn_to_page(pfn) (mem_map + (pfn))
#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#endif /* CONFIG_DISCONTIGMEM */
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#endif /* __KERNEL__ */
#endif /* _PARISC_PAGE_H */
|
