1
2
3
4
5
6
7
8
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
24
25
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 FIRST_USER_ADDRESS 0UL
63
64#define PHYS_ADDR_MASK29 0x1fffffff
65#define PHYS_ADDR_MASK32 0xffffffff
66
67static inline unsigned long phys_addr_mask(void)
68{
69
70 if (__in_29bit_mode())
71 return PHYS_ADDR_MASK29;
72
73 return PHYS_ADDR_MASK32;
74}
75
76#define PTE_PHYS_MASK (phys_addr_mask() & PAGE_MASK)
77#define PTE_FLAGS_MASK (~(PTE_PHYS_MASK) << PAGE_SHIFT)
78
79#ifdef CONFIG_SUPERH32
80#define VMALLOC_START (P3SEG)
81#else
82#define VMALLOC_START (0xf0000000)
83#endif
84#define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
85
86#if defined(CONFIG_SUPERH32)
87#include <asm/pgtable_32.h>
88#else
89#include <asm/pgtable_64.h>
90#endif
91
92
93
94
95
96
97
98
99
100
101
102#define __P000 PAGE_NONE
103#define __P001 PAGE_READONLY
104#define __P010 PAGE_COPY
105#define __P011 PAGE_COPY
106#define __P100 PAGE_EXECREAD
107#define __P101 PAGE_EXECREAD
108#define __P110 PAGE_COPY
109#define __P111 PAGE_COPY
110
111#define __S000 PAGE_NONE
112#define __S001 PAGE_READONLY
113#define __S010 PAGE_WRITEONLY
114#define __S011 PAGE_SHARED
115#define __S100 PAGE_EXECREAD
116#define __S101 PAGE_EXECREAD
117#define __S110 PAGE_RWX
118#define __S111 PAGE_RWX
119
120typedef pte_t *pte_addr_t;
121
122#define kern_addr_valid(addr) (1)
123
124#define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
125
126
127
128
129extern void pgtable_cache_init(void);
130
131struct vm_area_struct;
132struct mm_struct;
133
134extern void __update_cache(struct vm_area_struct *vma,
135 unsigned long address, pte_t pte);
136extern void __update_tlb(struct vm_area_struct *vma,
137 unsigned long address, pte_t pte);
138
139static inline void
140update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep)
141{
142 pte_t pte = *ptep;
143 __update_cache(vma, address, pte);
144 __update_tlb(vma, address, pte);
145}
146
147extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
148extern void paging_init(void);
149extern void page_table_range_init(unsigned long start, unsigned long end,
150 pgd_t *pgd);
151
152static inline bool __pte_access_permitted(pte_t pte, u64 prot)
153{
154 return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot;
155}
156
157#ifdef CONFIG_X2TLB
158static inline bool pte_access_permitted(pte_t pte, bool write)
159{
160 u64 prot = _PAGE_PRESENT;
161
162 prot |= _PAGE_EXT(_PAGE_EXT_KERN_READ | _PAGE_EXT_USER_READ);
163 if (write)
164 prot |= _PAGE_EXT(_PAGE_EXT_KERN_WRITE | _PAGE_EXT_USER_WRITE);
165 return __pte_access_permitted(pte, prot);
166}
167#elif defined(CONFIG_SUPERH64)
168static inline bool pte_access_permitted(pte_t pte, bool write)
169{
170 u64 prot = _PAGE_PRESENT | _PAGE_USER | _PAGE_READ;
171
172 if (write)
173 prot |= _PAGE_WRITE;
174 return __pte_access_permitted(pte, prot);
175}
176#else
177static inline bool pte_access_permitted(pte_t pte, bool write)
178{
179 u64 prot = _PAGE_PRESENT | _PAGE_USER;
180
181 if (write)
182 prot |= _PAGE_RW;
183 return __pte_access_permitted(pte, prot);
184}
185#endif
186
187#define pte_access_permitted pte_access_permitted
188
189
190#define HAVE_ARCH_UNMAPPED_AREA
191#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
192
193#include <asm-generic/pgtable.h>
194
195#endif
196