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9#ifndef __ASM_SH_PGTABLE_H
10#define __ASM_SH_PGTABLE_H
11
12#ifdef CONFIG_X2TLB
13#include <asm/pgtable-3level.h>
14#else
15#include <asm/pgtable-2level.h>
16#endif
17#include <asm/page.h>
18#include <asm/mmu.h>
19
20#ifndef __ASSEMBLY__
21#include <asm/addrspace.h>
22#include <asm/fixmap.h>
23
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26
27
28extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
29#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
30
31#endif
32
33
34
35
36
37#define NEFF 32
38#define NEFF_SIGN (1LL << (NEFF - 1))
39#define NEFF_MASK (-1LL << NEFF)
40
41static inline unsigned long long neff_sign_extend(unsigned long val)
42{
43 unsigned long long extended = val;
44 return (extended & NEFF_SIGN) ? (extended | NEFF_MASK) : extended;
45}
46
47#ifdef CONFIG_29BIT
48#define NPHYS 29
49#else
50#define NPHYS 32
51#endif
52
53#define NPHYS_SIGN (1LL << (NPHYS - 1))
54#define NPHYS_MASK (-1LL << NPHYS)
55
56#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
57#define PGDIR_MASK (~(PGDIR_SIZE-1))
58
59
60#define PTRS_PER_PTE (PAGE_SIZE / (1 << PTE_MAGNITUDE))
61
62#define PHYS_ADDR_MASK29 0x1fffffff
63#define PHYS_ADDR_MASK32 0xffffffff
64
65static inline unsigned long phys_addr_mask(void)
66{
67
68 if (__in_29bit_mode())
69 return PHYS_ADDR_MASK29;
70
71 return PHYS_ADDR_MASK32;
72}
73
74#define PTE_PHYS_MASK (phys_addr_mask() & PAGE_MASK)
75#define PTE_FLAGS_MASK (~(PTE_PHYS_MASK) << PAGE_SHIFT)
76
77#define VMALLOC_START (P3SEG)
78#define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
79
80#include <asm/pgtable_32.h>
81
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90
91
92#define __P000 PAGE_NONE
93#define __P001 PAGE_READONLY
94#define __P010 PAGE_COPY
95#define __P011 PAGE_COPY
96#define __P100 PAGE_EXECREAD
97#define __P101 PAGE_EXECREAD
98#define __P110 PAGE_COPY
99#define __P111 PAGE_COPY
100
101#define __S000 PAGE_NONE
102#define __S001 PAGE_READONLY
103#define __S010 PAGE_WRITEONLY
104#define __S011 PAGE_SHARED
105#define __S100 PAGE_EXECREAD
106#define __S101 PAGE_EXECREAD
107#define __S110 PAGE_RWX
108#define __S111 PAGE_RWX
109
110typedef pte_t *pte_addr_t;
111
112#define kern_addr_valid(addr) (1)
113
114#define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
115
116struct vm_area_struct;
117struct mm_struct;
118
119extern void __update_cache(struct vm_area_struct *vma,
120 unsigned long address, pte_t pte);
121extern void __update_tlb(struct vm_area_struct *vma,
122 unsigned long address, pte_t pte);
123
124static inline void
125update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep)
126{
127 pte_t pte = *ptep;
128 __update_cache(vma, address, pte);
129 __update_tlb(vma, address, pte);
130}
131
132extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
133extern void paging_init(void);
134extern void page_table_range_init(unsigned long start, unsigned long end,
135 pgd_t *pgd);
136
137static inline bool __pte_access_permitted(pte_t pte, u64 prot)
138{
139 return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot;
140}
141
142#ifdef CONFIG_X2TLB
143static inline bool pte_access_permitted(pte_t pte, bool write)
144{
145 u64 prot = _PAGE_PRESENT;
146
147 prot |= _PAGE_EXT(_PAGE_EXT_KERN_READ | _PAGE_EXT_USER_READ);
148 if (write)
149 prot |= _PAGE_EXT(_PAGE_EXT_KERN_WRITE | _PAGE_EXT_USER_WRITE);
150 return __pte_access_permitted(pte, prot);
151}
152#else
153static inline bool pte_access_permitted(pte_t pte, bool write)
154{
155 u64 prot = _PAGE_PRESENT | _PAGE_USER;
156
157 if (write)
158 prot |= _PAGE_RW;
159 return __pte_access_permitted(pte, prot);
160}
161#endif
162
163#define pte_access_permitted pte_access_permitted
164
165
166#define HAVE_ARCH_UNMAPPED_AREA
167#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
168
169#endif
170