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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))
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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
108struct vm_area_struct;
109extern void copy_user_highpage(struct page *to, struct page *from,
110 unsigned long vaddr, struct vm_area_struct *vma);
111
112#define __HAVE_ARCH_COPY_USER_HIGHPAGE
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116
117#ifdef CONFIG_PHYS_ADDR_T_64BIT
118 #ifdef CONFIG_CPU_MIPS32
119 typedef struct { unsigned long pte_low, pte_high; } pte_t;
120 #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
121 #define __pte(x) ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
122 #else
123 typedef struct { unsigned long long pte; } pte_t;
124 #define pte_val(x) ((x).pte)
125 #define __pte(x) ((pte_t) { (x) } )
126 #endif
127#else
128typedef struct { unsigned long pte; } pte_t;
129#define pte_val(x) ((x).pte)
130#define __pte(x) ((pte_t) { (x) } )
131#endif
132typedef struct page *pgtable_t;
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142typedef struct { unsigned long pgd; } pgd_t;
143#define pgd_val(x) ((x).pgd)
144#define __pgd(x) ((pgd_t) { (x) } )
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149typedef struct { unsigned long pgprot; } pgprot_t;
150#define pgprot_val(x) ((x).pgprot)
151#define __pgprot(x) ((pgprot_t) { (x) } )
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160#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
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164
165#ifdef CONFIG_64BIT
166#define __pa(x) \
167({ \
168 unsigned long __x = (unsigned long)(x); \
169 __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \
170})
171#else
172#define __pa(x) \
173 ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
174#endif
175#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
176#include <asm/io.h>
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190
191#ifndef __pa_symbol
192#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
193#endif
194
195#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
196
197#ifdef CONFIG_FLATMEM
198
199static inline int pfn_valid(unsigned long pfn)
200{
201
202 extern unsigned long max_mapnr;
203 unsigned long pfn_offset = ARCH_PFN_OFFSET;
204
205 return pfn >= pfn_offset && pfn < max_mapnr;
206}
207
208#elif defined(CONFIG_SPARSEMEM)
209
210
211
212#elif defined(CONFIG_NEED_MULTIPLE_NODES)
213
214#define pfn_valid(pfn) \
215({ \
216 unsigned long __pfn = (pfn); \
217 int __n = pfn_to_nid(__pfn); \
218 ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
219 NODE_DATA(__n)->node_spanned_pages) \
220 : 0); \
221})
222
223#endif
224
225#define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(virt_to_phys((void *) \
226 (kaddr))))
227
228extern int __virt_addr_valid(const volatile void *kaddr);
229#define virt_addr_valid(kaddr) \
230 __virt_addr_valid((const volatile void *) (kaddr))
231
232#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
233 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
234
235#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
236#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET)
237
238#include <asm-generic/memory_model.h>
239#include <asm-generic/getorder.h>
240
241#endif
242