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9#ifndef _ASM_PAGE_H
10#define _ASM_PAGE_H
11
12#include <spaces.h>
13#include <linux/const.h>
14
15
16
17
18#ifdef CONFIG_PAGE_SIZE_4KB
19#define PAGE_SHIFT 12
20#endif
21#ifdef CONFIG_PAGE_SIZE_8KB
22#define PAGE_SHIFT 13
23#endif
24#ifdef CONFIG_PAGE_SIZE_16KB
25#define PAGE_SHIFT 14
26#endif
27#ifdef CONFIG_PAGE_SIZE_32KB
28#define PAGE_SHIFT 15
29#endif
30#ifdef CONFIG_PAGE_SIZE_64KB
31#define PAGE_SHIFT 16
32#endif
33#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
34#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
35
36#ifdef CONFIG_HUGETLB_PAGE
37#define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3)
38#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
39#define HPAGE_MASK (~(HPAGE_SIZE - 1))
40#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
41#endif
42
43#ifndef __ASSEMBLY__
44
45#include <linux/pfn.h>
46#include <asm/io.h>
47
48extern void build_clear_page(void);
49extern void build_copy_page(void);
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55
56#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
57
58extern void clear_page(void * page);
59extern void copy_page(void * to, void * from);
60
61extern unsigned long shm_align_mask;
62
63static inline unsigned long pages_do_alias(unsigned long addr1,
64 unsigned long addr2)
65{
66 return (addr1 ^ addr2) & shm_align_mask;
67}
68
69struct page;
70
71static inline void clear_user_page(void *addr, unsigned long vaddr,
72 struct page *page)
73{
74 extern void (*flush_data_cache_page)(unsigned long addr);
75
76 clear_page(addr);
77 if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
78 flush_data_cache_page((unsigned long)addr);
79}
80
81extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
82 struct page *to);
83struct vm_area_struct;
84extern void copy_user_highpage(struct page *to, struct page *from,
85 unsigned long vaddr, struct vm_area_struct *vma);
86
87#define __HAVE_ARCH_COPY_USER_HIGHPAGE
88
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90
91
92#ifdef CONFIG_64BIT_PHYS_ADDR
93 #ifdef CONFIG_CPU_MIPS32
94 typedef struct { unsigned long pte_low, pte_high; } pte_t;
95 #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
96 #define __pte(x) ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
97 #else
98 typedef struct { unsigned long long pte; } pte_t;
99 #define pte_val(x) ((x).pte)
100 #define __pte(x) ((pte_t) { (x) } )
101 #endif
102#else
103typedef struct { unsigned long pte; } pte_t;
104#define pte_val(x) ((x).pte)
105#define __pte(x) ((pte_t) { (x) } )
106#endif
107typedef struct page *pgtable_t;
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117typedef struct { unsigned long pgd; } pgd_t;
118#define pgd_val(x) ((x).pgd)
119#define __pgd(x) ((pgd_t) { (x) } )
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124typedef struct { unsigned long pgprot; } pgprot_t;
125#define pgprot_val(x) ((x).pgprot)
126#define __pgprot(x) ((pgprot_t) { (x) } )
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135#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
136
137#endif
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141
142#ifdef CONFIG_64BIT
143#define __pa(x) \
144({ \
145 unsigned long __x = (unsigned long)(x); \
146 __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \
147})
148#else
149#define __pa(x) \
150 ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
151#endif
152#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
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167#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
168
169#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
170
171#ifdef CONFIG_FLATMEM
172
173#define pfn_valid(pfn) \
174({ \
175 unsigned long __pfn = (pfn); \
176 \
177 extern unsigned long min_low_pfn; \
178 \
179 __pfn >= min_low_pfn && __pfn < max_mapnr; \
180})
181
182#elif defined(CONFIG_SPARSEMEM)
183
184
185
186#elif defined(CONFIG_NEED_MULTIPLE_NODES)
187
188#define pfn_valid(pfn) \
189({ \
190 unsigned long __pfn = (pfn); \
191 int __n = pfn_to_nid(__pfn); \
192 ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
193 NODE_DATA(__n)->node_spanned_pages) \
194 : 0); \
195})
196
197#endif
198
199#define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(virt_to_phys(kaddr)))
200#define virt_addr_valid(kaddr) pfn_valid(PFN_DOWN(virt_to_phys(kaddr)))
201
202#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
203 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
204
205#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE + \
206 PHYS_OFFSET)
207#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET - \
208 PHYS_OFFSET)
209
210#include <asm-generic/memory_model.h>
211#include <asm-generic/getorder.h>
212
213#endif
214