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25#include <linux/kernel.h>
26#include <linux/mm.h>
27#include <linux/init.h>
28#include <linux/highmem.h>
29#include <linux/pagemap.h>
30
31#include <asm/tlbflush.h>
32#include <asm/tlb.h>
33
34#include "mmu_decl.h"
35
36
37
38
39void flush_hash_entry(struct mm_struct *mm, pte_t *ptep, unsigned long addr)
40{
41 unsigned long ptephys;
42
43 if (Hash != 0) {
44 ptephys = __pa(ptep) & PAGE_MASK;
45 flush_hash_pages(mm->context.id, addr, ptephys, 1);
46 }
47}
48EXPORT_SYMBOL(flush_hash_entry);
49
50
51
52
53
54void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr)
55{
56 if (Hash != 0)
57 return;
58 _tlbie(addr);
59}
60
61
62
63
64
65void tlb_flush(struct mmu_gather *tlb)
66{
67 if (Hash == 0) {
68
69
70
71
72 _tlbia();
73 }
74}
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87
88
89static void flush_range(struct mm_struct *mm, unsigned long start,
90 unsigned long end)
91{
92 pmd_t *pmd;
93 unsigned long pmd_end;
94 int count;
95 unsigned int ctx = mm->context.id;
96
97 if (Hash == 0) {
98 _tlbia();
99 return;
100 }
101 start &= PAGE_MASK;
102 if (start >= end)
103 return;
104 end = (end - 1) | ~PAGE_MASK;
105 pmd = pmd_offset(pud_offset(pgd_offset(mm, start), start), start);
106 for (;;) {
107 pmd_end = ((start + PGDIR_SIZE) & PGDIR_MASK) - 1;
108 if (pmd_end > end)
109 pmd_end = end;
110 if (!pmd_none(*pmd)) {
111 count = ((pmd_end - start) >> PAGE_SHIFT) + 1;
112 flush_hash_pages(ctx, start, pmd_val(*pmd), count);
113 }
114 if (pmd_end == end)
115 break;
116 start = pmd_end + 1;
117 ++pmd;
118 }
119}
120
121
122
123
124void flush_tlb_kernel_range(unsigned long start, unsigned long end)
125{
126 flush_range(&init_mm, start, end);
127}
128EXPORT_SYMBOL(flush_tlb_kernel_range);
129
130
131
132
133void flush_tlb_mm(struct mm_struct *mm)
134{
135 struct vm_area_struct *mp;
136
137 if (Hash == 0) {
138 _tlbia();
139 return;
140 }
141
142
143
144
145
146
147
148 for (mp = mm->mmap; mp != NULL; mp = mp->vm_next)
149 flush_range(mp->vm_mm, mp->vm_start, mp->vm_end);
150}
151EXPORT_SYMBOL(flush_tlb_mm);
152
153void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
154{
155 struct mm_struct *mm;
156 pmd_t *pmd;
157
158 if (Hash == 0) {
159 _tlbie(vmaddr);
160 return;
161 }
162 mm = (vmaddr < TASK_SIZE)? vma->vm_mm: &init_mm;
163 pmd = pmd_offset(pud_offset(pgd_offset(mm, vmaddr), vmaddr), vmaddr);
164 if (!pmd_none(*pmd))
165 flush_hash_pages(mm->context.id, vmaddr, pmd_val(*pmd), 1);
166}
167EXPORT_SYMBOL(flush_tlb_page);
168
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172
173
174void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
175 unsigned long end)
176{
177 flush_range(vma->vm_mm, start, end);
178}
179EXPORT_SYMBOL(flush_tlb_range);
180