1 #ifndef __ASM_SH64_PGALLOC_H
2 #define __ASM_SH64_PGALLOC_H
3
4 #include <asm/processor.h>
5 #include <linux/threads.h>
6 #include <linux/slab.h>
7
8 #define pgd_quicklist ((unsigned long *)0)
9 #define pmd_quicklist ((unsigned long *)0)
10 #define pte_quicklist ((unsigned long *)0)
11 #define pgtable_cache_size 0L
12
13 /*
14 #define pmd_populate(mm, pmd, pte) \
15 set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
16
17 */
18
19 /*
20 * Allocate and free page tables.
21 */
22
pgd_alloc(struct mm_struct * mm)23 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
24 {
25 unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
26 pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
27
28 if (pgd)
29 memset(pgd, 0, pgd_size);
30
31 return pgd;
32 }
33
pgd_free(pgd_t * pgd)34 static inline void pgd_free(pgd_t *pgd)
35 {
36 kfree(pgd);
37 }
38
pte_alloc_one(struct mm_struct * mm,unsigned long address)39 static inline pte_t *pte_alloc_one(struct mm_struct *mm, unsigned long address)
40 {
41 pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL);
42 if (pte)
43 clear_page(pte);
44 return pte;
45 }
46
pte_alloc_one_fast(struct mm_struct * mm,unsigned long address)47 static inline pte_t *pte_alloc_one_fast(struct mm_struct *mm, unsigned long address)
48 {
49 return 0;
50 }
51
pte_free_slow(pte_t * pte)52 static inline void pte_free_slow(pte_t *pte)
53 {
54 free_page((unsigned long)pte);
55 }
56
57 #define pte_free(pte) pte_free_slow(pte)
58
59 #define pgd_set(pgd,pmd) pgd_val(*pgd) = ( ((unsigned long)pmd) & PAGE_MASK)
60
61 #define pgd_populate(mm, pgd, pmd) pgd_set(pgd,pmd)
62
63
64 static inline pmd_t*
pmd_alloc_one_fast(struct mm_struct * mm,unsigned long addr)65 pmd_alloc_one_fast (struct mm_struct *mm, unsigned long addr)
66 {
67 #if defined(CONFIG_SH64_PGTABLE_2_LEVEL)
68 BUG();
69 #endif
70 return 0;
71 }
72
73 static inline pmd_t*
pmd_alloc_one(struct mm_struct * mm,unsigned long addr)74 pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
75 {
76 pmd_t *pmd = NULL;
77
78 #if defined(CONFIG_SH64_PGTABLE_2_LEVEL)
79 BUG();
80 #elif defined(CONFIG_SH64_PGTABLE_3_LEVEL)
81 pmd = (pmd_t *) __get_free_page(GFP_KERNEL);
82
83 if (pmd != NULL )
84 clear_page(pmd);
85 #endif
86 return pmd;
87 }
88
89 #if defined(CONFIG_SH64_PGTABLE_2_LEVEL)
90 static inline void
pmd_free(pmd_t * pmd)91 pmd_free (pmd_t *pmd)
92 {
93 return;
94 }
95 #elif defined(CONFIG_SH64_PGTABLE_3_LEVEL)
96 static inline void
pmd_free(pmd_t * pmd)97 pmd_free (pmd_t *pmd)
98 {
99 free_page((unsigned long)pmd);
100 }
101 #endif
102
103
104 static inline void
pmd_populate(struct mm_struct * mm,pmd_t * pmd,pte_t * pte)105 pmd_populate (struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
106 {
107
108 pmd_set(pmd,pte);
109
110
111 // pmd_val(*pmd_entry) = __pa(pte);
112 }
113
114
115 /* Do nothing */
116 #define do_check_pgt_cache(low, high) (0)
117
118 /*
119 * TLB flushing:
120 *
121 * - flush_tlb() flushes the current mm struct TLBs
122 * - flush_tlb_all() flushes all processes TLBs
123 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
124 * - flush_tlb_page(vma, vmaddr) flushes one page
125 * - flush_tlb_range(mm, start, end) flushes a range of pages
126 * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
127 */
128
129 extern void flush_tlb(void);
130 extern void flush_tlb_all(void);
131 extern void flush_tlb_mm(struct mm_struct *mm);
132 extern void flush_tlb_range(struct mm_struct *mm, unsigned long start,
133 unsigned long end);
134 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
135
flush_tlb_pgtables(struct mm_struct * mm,unsigned long start,unsigned long end)136 static inline void flush_tlb_pgtables(struct mm_struct *mm,
137 unsigned long start, unsigned long end)
138 { /* Nothing to do */
139 }
140
141 /* These are generic functions. These will need to change once D cache
142 * aliasing support has been added.
143 */
144
ptep_get_and_clear(pte_t * ptep)145 static inline pte_t ptep_get_and_clear(pte_t *ptep)
146 {
147 pte_t pte = *ptep;
148 pte_clear(ptep);
149 return pte;
150 }
151
152 /*
153 * Following functions are same as generic ones.
154 */
ptep_test_and_clear_young(pte_t * ptep)155 static inline int ptep_test_and_clear_young(pte_t *ptep)
156 {
157 pte_t pte = *ptep;
158 if (!pte_young(pte))
159 return 0;
160 set_pte(ptep, pte_mkold(pte));
161 return 1;
162 }
163
ptep_test_and_clear_dirty(pte_t * ptep)164 static inline int ptep_test_and_clear_dirty(pte_t *ptep)
165 {
166 pte_t pte = *ptep;
167 if (!pte_dirty(pte))
168 return 0;
169 set_pte(ptep, pte_mkclean(pte));
170 return 1;
171 }
172
ptep_set_wrprotect(pte_t * ptep)173 static inline void ptep_set_wrprotect(pte_t *ptep)
174 {
175 pte_t old_pte = *ptep;
176 set_pte(ptep, pte_wrprotect(old_pte));
177 }
178
ptep_mkdirty(pte_t * ptep)179 static inline void ptep_mkdirty(pte_t *ptep)
180 {
181 pte_t old_pte = *ptep;
182 set_pte(ptep, pte_mkdirty(old_pte));
183 }
184 #endif /* __ASM_SH64_PGALLOC_H */
185
186