1
2
3
4
5
6
7#ifndef __UM_PAGE_H
8#define __UM_PAGE_H
9
10#include <linux/const.h>
11
12
13#define PAGE_SHIFT 12
14#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
15#define PAGE_MASK (~(PAGE_SIZE-1))
16
17#ifndef __ASSEMBLY__
18
19struct page;
20
21#include <linux/types.h>
22#include <asm/vm-flags.h>
23
24
25
26
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
31#define clear_user_page(page, vaddr, pg) clear_page(page)
32#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
33
34#if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT)
35
36typedef struct { unsigned long pte_low, pte_high; } pte_t;
37typedef struct { unsigned long pmd; } pmd_t;
38typedef struct { unsigned long pgd; } pgd_t;
39#define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32))
40
41#define pte_get_bits(pte, bits) ((pte).pte_low & (bits))
42#define pte_set_bits(pte, bits) ((pte).pte_low |= (bits))
43#define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits))
44#define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \
45 smp_wmb(); \
46 (to).pte_low = (from).pte_low; })
47#define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high)
48#define pte_set_val(pte, phys, prot) \
49 ({ (pte).pte_high = (phys) >> 32; \
50 (pte).pte_low = (phys) | pgprot_val(prot); })
51
52#define pmd_val(x) ((x).pmd)
53#define __pmd(x) ((pmd_t) { (x) } )
54
55typedef unsigned long long pfn_t;
56typedef unsigned long long phys_t;
57
58#else
59
60typedef struct { unsigned long pte; } pte_t;
61typedef struct { unsigned long pgd; } pgd_t;
62
63#ifdef CONFIG_3_LEVEL_PGTABLES
64typedef struct { unsigned long pmd; } pmd_t;
65#define pmd_val(x) ((x).pmd)
66#define __pmd(x) ((pmd_t) { (x) } )
67#endif
68
69#define pte_val(x) ((x).pte)
70
71
72#define pte_get_bits(p, bits) ((p).pte & (bits))
73#define pte_set_bits(p, bits) ((p).pte |= (bits))
74#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
75#define pte_copy(to, from) ((to).pte = (from).pte)
76#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
77#define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
78
79typedef unsigned long pfn_t;
80typedef unsigned long phys_t;
81
82#endif
83
84typedef struct { unsigned long pgprot; } pgprot_t;
85
86typedef struct page *pgtable_t;
87
88#define pgd_val(x) ((x).pgd)
89#define pgprot_val(x) ((x).pgprot)
90
91#define __pte(x) ((pte_t) { (x) } )
92#define __pgd(x) ((pgd_t) { (x) } )
93#define __pgprot(x) ((pgprot_t) { (x) } )
94
95extern unsigned long uml_physmem;
96
97#define PAGE_OFFSET (uml_physmem)
98#define KERNELBASE PAGE_OFFSET
99
100#define __va_space (8*1024*1024)
101
102#include <mem.h>
103
104
105
106
107
108
109#define __pa(virt) to_phys((void *) (unsigned long) (virt))
110#define __va(phys) to_virt((unsigned long) (phys))
111
112#define phys_to_pfn(p) ((pfn_t) ((p) >> PAGE_SHIFT))
113#define pfn_to_phys(pfn) ((phys_t) ((pfn) << PAGE_SHIFT))
114
115#define pfn_valid(pfn) ((pfn) < max_mapnr)
116#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
117
118#include <asm-generic/memory_model.h>
119#include <asm-generic/getorder.h>
120
121#endif
122#endif
123
