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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#include <linux/kernel.h>
15#include <asm/mipsregs.h>
16
17
18
19
20#ifdef CONFIG_PAGE_SIZE_4KB
21#define PAGE_SHIFT 12
22#endif
23#ifdef CONFIG_PAGE_SIZE_8KB
24#define PAGE_SHIFT 13
25#endif
26#ifdef CONFIG_PAGE_SIZE_16KB
27#define PAGE_SHIFT 14
28#endif
29#ifdef CONFIG_PAGE_SIZE_32KB
30#define PAGE_SHIFT 15
31#endif
32#ifdef CONFIG_PAGE_SIZE_64KB
33#define PAGE_SHIFT 16
34#endif
35#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
36#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
37
38
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40
41
42static inline unsigned int page_size_ftlb(unsigned int mmuextdef)
43{
44 switch (mmuextdef) {
45 case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT:
46 if (PAGE_SIZE == (1 << 30))
47 return 5;
48 if (PAGE_SIZE == (1llu << 32))
49 return 6;
50 if (PAGE_SIZE > (256 << 10))
51 return 7;
52
53 case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT:
54 return (PAGE_SHIFT - 10) / 2;
55 default:
56 panic("Invalid FTLB configuration with Conf4_mmuextdef=%d value\n",
57 mmuextdef >> 14);
58 }
59}
60
61#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
62#define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3)
63#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
64#define HPAGE_MASK (~(HPAGE_SIZE - 1))
65#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
66#else
67#define HPAGE_SHIFT ({BUILD_BUG(); 0; })
68#define HPAGE_SIZE ({BUILD_BUG(); 0; })
69#define HPAGE_MASK ({BUILD_BUG(); 0; })
70#define HUGETLB_PAGE_ORDER ({BUILD_BUG(); 0; })
71#endif
72
73#include <linux/pfn.h>
74
75extern void build_clear_page(void);
76extern void build_copy_page(void);
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82
83#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
84
85extern void clear_page(void * page);
86extern void copy_page(void * to, void * from);
87
88extern unsigned long shm_align_mask;
89
90static inline unsigned long pages_do_alias(unsigned long addr1,
91 unsigned long addr2)
92{
93 return (addr1 ^ addr2) & shm_align_mask;
94}
95
96struct page;
97
98static inline void clear_user_page(void *addr, unsigned long vaddr,
99 struct page *page)
100{
101 extern void (*flush_data_cache_page)(unsigned long addr);
102
103 clear_page(addr);
104 if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
105 flush_data_cache_page((unsigned long)addr);
106}
107
108extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
109 struct page *to);
110struct vm_area_struct;
111extern void copy_user_highpage(struct page *to, struct page *from,
112 unsigned long vaddr, struct vm_area_struct *vma);
113
114#define __HAVE_ARCH_COPY_USER_HIGHPAGE
115
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117
118
119#ifdef CONFIG_64BIT_PHYS_ADDR
120 #ifdef CONFIG_CPU_MIPS32
121 typedef struct { unsigned long pte_low, pte_high; } pte_t;
122 #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
123 #define __pte(x) ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
124 #else
125 typedef struct { unsigned long long pte; } pte_t;
126 #define pte_val(x) ((x).pte)
127 #define __pte(x) ((pte_t) { (x) } )
128 #endif
129#else
130typedef struct { unsigned long pte; } pte_t;
131#define pte_val(x) ((x).pte)
132#define __pte(x) ((pte_t) { (x) } )
133#endif
134typedef struct page *pgtable_t;
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144typedef struct { unsigned long pgd; } pgd_t;
145#define pgd_val(x) ((x).pgd)
146#define __pgd(x) ((pgd_t) { (x) } )
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151typedef struct { unsigned long pgprot; } pgprot_t;
152#define pgprot_val(x) ((x).pgprot)
153#define __pgprot(x) ((pgprot_t) { (x) } )
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162#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
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166
167#ifdef CONFIG_64BIT
168#define __pa(x) \
169({ \
170 unsigned long __x = (unsigned long)(x); \
171 __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \
172})
173#else
174#define __pa(x) \
175 ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
176#endif
177#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
178#include <asm/io.h>
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192
193#ifndef __pa_symbol
194#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
195#endif
196
197#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
198
199#ifdef CONFIG_FLATMEM
200
201static inline int pfn_valid(unsigned long pfn)
202{
203
204 extern unsigned long max_mapnr;
205
206 return pfn >= ARCH_PFN_OFFSET && pfn < max_mapnr;
207}
208
209#elif defined(CONFIG_SPARSEMEM)
210
211
212
213#elif defined(CONFIG_NEED_MULTIPLE_NODES)
214
215#define pfn_valid(pfn) \
216({ \
217 unsigned long __pfn = (pfn); \
218 int __n = pfn_to_nid(__pfn); \
219 ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
220 NODE_DATA(__n)->node_spanned_pages) \
221 : 0); \
222})
223
224#endif
225
226#define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(virt_to_phys((void *) \
227 (kaddr))))
228
229extern int __virt_addr_valid(const volatile void *kaddr);
230#define virt_addr_valid(kaddr) \
231 __virt_addr_valid((const volatile void *) (kaddr))
232
233#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
234 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
235
236#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
237#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET)
238
239#include <asm-generic/memory_model.h>
240#include <asm-generic/getorder.h>
241
242#endif
243