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1da177e4 LT |
1 | #ifndef _M68K_TLBFLUSH_H |
2 | #define _M68K_TLBFLUSH_H | |
3 | ||
1da177e4 LT |
4 | |
5 | #ifndef CONFIG_SUN3 | |
6 | ||
7 | #include <asm/current.h> | |
8 | ||
9 | static inline void flush_tlb_kernel_page(void *addr) | |
10 | { | |
11 | if (CPU_IS_040_OR_060) { | |
12 | mm_segment_t old_fs = get_fs(); | |
13 | set_fs(KERNEL_DS); | |
14 | __asm__ __volatile__(".chip 68040\n\t" | |
15 | "pflush (%0)\n\t" | |
16 | ".chip 68k" | |
17 | : : "a" (addr)); | |
18 | set_fs(old_fs); | |
19 | } else | |
20 | __asm__ __volatile__("pflush #4,#4,(%0)" : : "a" (addr)); | |
21 | } | |
22 | ||
23 | /* | |
24 | * flush all user-space atc entries. | |
25 | */ | |
26 | static inline void __flush_tlb(void) | |
27 | { | |
28 | if (CPU_IS_040_OR_060) | |
29 | __asm__ __volatile__(".chip 68040\n\t" | |
30 | "pflushan\n\t" | |
31 | ".chip 68k"); | |
32 | else | |
33 | __asm__ __volatile__("pflush #0,#4"); | |
34 | } | |
35 | ||
36 | static inline void __flush_tlb040_one(unsigned long addr) | |
37 | { | |
38 | __asm__ __volatile__(".chip 68040\n\t" | |
39 | "pflush (%0)\n\t" | |
40 | ".chip 68k" | |
41 | : : "a" (addr)); | |
42 | } | |
43 | ||
44 | static inline void __flush_tlb_one(unsigned long addr) | |
45 | { | |
46 | if (CPU_IS_040_OR_060) | |
47 | __flush_tlb040_one(addr); | |
48 | else | |
49 | __asm__ __volatile__("pflush #0,#4,(%0)" : : "a" (addr)); | |
50 | } | |
51 | ||
52 | #define flush_tlb() __flush_tlb() | |
53 | ||
54 | /* | |
55 | * flush all atc entries (both kernel and user-space entries). | |
56 | */ | |
57 | static inline void flush_tlb_all(void) | |
58 | { | |
59 | if (CPU_IS_040_OR_060) | |
60 | __asm__ __volatile__(".chip 68040\n\t" | |
61 | "pflusha\n\t" | |
62 | ".chip 68k"); | |
63 | else | |
64 | __asm__ __volatile__("pflusha"); | |
65 | } | |
66 | ||
67 | static inline void flush_tlb_mm(struct mm_struct *mm) | |
68 | { | |
69 | if (mm == current->active_mm) | |
70 | __flush_tlb(); | |
71 | } | |
72 | ||
73 | static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) | |
74 | { | |
75 | if (vma->vm_mm == current->active_mm) { | |
76 | mm_segment_t old_fs = get_fs(); | |
77 | set_fs(USER_DS); | |
78 | __flush_tlb_one(addr); | |
79 | set_fs(old_fs); | |
80 | } | |
81 | } | |
82 | ||
83 | static inline void flush_tlb_range(struct vm_area_struct *vma, | |
84 | unsigned long start, unsigned long end) | |
85 | { | |
86 | if (vma->vm_mm == current->active_mm) | |
87 | __flush_tlb(); | |
88 | } | |
89 | ||
90 | static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) | |
91 | { | |
92 | flush_tlb_all(); | |
93 | } | |
94 | ||
95 | static inline void flush_tlb_pgtables(struct mm_struct *mm, | |
96 | unsigned long start, unsigned long end) | |
97 | { | |
98 | } | |
99 | ||
100 | #else | |
101 | ||
102 | ||
103 | /* Reserved PMEGs. */ | |
104 | extern char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; | |
105 | extern unsigned long pmeg_vaddr[SUN3_PMEGS_NUM]; | |
106 | extern unsigned char pmeg_alloc[SUN3_PMEGS_NUM]; | |
107 | extern unsigned char pmeg_ctx[SUN3_PMEGS_NUM]; | |
108 | ||
109 | /* Flush all userspace mappings one by one... (why no flush command, | |
110 | sun?) */ | |
111 | static inline void flush_tlb_all(void) | |
112 | { | |
113 | unsigned long addr; | |
114 | unsigned char ctx, oldctx; | |
115 | ||
116 | oldctx = sun3_get_context(); | |
117 | for(addr = 0x00000000; addr < TASK_SIZE; addr += SUN3_PMEG_SIZE) { | |
118 | for(ctx = 0; ctx < 8; ctx++) { | |
119 | sun3_put_context(ctx); | |
120 | sun3_put_segmap(addr, SUN3_INVALID_PMEG); | |
121 | } | |
122 | } | |
123 | ||
124 | sun3_put_context(oldctx); | |
125 | /* erase all of the userspace pmeg maps, we've clobbered them | |
126 | all anyway */ | |
127 | for(addr = 0; addr < SUN3_INVALID_PMEG; addr++) { | |
128 | if(pmeg_alloc[addr] == 1) { | |
129 | pmeg_alloc[addr] = 0; | |
130 | pmeg_ctx[addr] = 0; | |
131 | pmeg_vaddr[addr] = 0; | |
132 | } | |
133 | } | |
134 | ||
135 | } | |
136 | ||
137 | /* Clear user TLB entries within the context named in mm */ | |
138 | static inline void flush_tlb_mm (struct mm_struct *mm) | |
139 | { | |
140 | unsigned char oldctx; | |
141 | unsigned char seg; | |
142 | unsigned long i; | |
143 | ||
144 | oldctx = sun3_get_context(); | |
145 | sun3_put_context(mm->context); | |
146 | ||
147 | for(i = 0; i < TASK_SIZE; i += SUN3_PMEG_SIZE) { | |
148 | seg = sun3_get_segmap(i); | |
149 | if(seg == SUN3_INVALID_PMEG) | |
150 | continue; | |
151 | ||
152 | sun3_put_segmap(i, SUN3_INVALID_PMEG); | |
153 | pmeg_alloc[seg] = 0; | |
154 | pmeg_ctx[seg] = 0; | |
155 | pmeg_vaddr[seg] = 0; | |
156 | } | |
157 | ||
158 | sun3_put_context(oldctx); | |
159 | ||
160 | } | |
161 | ||
162 | /* Flush a single TLB page. In this case, we're limited to flushing a | |
163 | single PMEG */ | |
164 | static inline void flush_tlb_page (struct vm_area_struct *vma, | |
165 | unsigned long addr) | |
166 | { | |
167 | unsigned char oldctx; | |
168 | unsigned char i; | |
169 | ||
170 | oldctx = sun3_get_context(); | |
171 | sun3_put_context(vma->vm_mm->context); | |
172 | addr &= ~SUN3_PMEG_MASK; | |
173 | if((i = sun3_get_segmap(addr)) != SUN3_INVALID_PMEG) | |
174 | { | |
175 | pmeg_alloc[i] = 0; | |
176 | pmeg_ctx[i] = 0; | |
177 | pmeg_vaddr[i] = 0; | |
178 | sun3_put_segmap (addr, SUN3_INVALID_PMEG); | |
179 | } | |
180 | sun3_put_context(oldctx); | |
181 | ||
182 | } | |
183 | /* Flush a range of pages from TLB. */ | |
184 | ||
185 | static inline void flush_tlb_range (struct vm_area_struct *vma, | |
186 | unsigned long start, unsigned long end) | |
187 | { | |
188 | struct mm_struct *mm = vma->vm_mm; | |
189 | unsigned char seg, oldctx; | |
190 | ||
191 | start &= ~SUN3_PMEG_MASK; | |
192 | ||
193 | oldctx = sun3_get_context(); | |
194 | sun3_put_context(mm->context); | |
195 | ||
196 | while(start < end) | |
197 | { | |
198 | if((seg = sun3_get_segmap(start)) == SUN3_INVALID_PMEG) | |
199 | goto next; | |
200 | if(pmeg_ctx[seg] == mm->context) { | |
201 | pmeg_alloc[seg] = 0; | |
202 | pmeg_ctx[seg] = 0; | |
203 | pmeg_vaddr[seg] = 0; | |
204 | } | |
205 | sun3_put_segmap(start, SUN3_INVALID_PMEG); | |
206 | next: | |
207 | start += SUN3_PMEG_SIZE; | |
208 | } | |
209 | } | |
210 | ||
211 | static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) | |
212 | { | |
213 | flush_tlb_all(); | |
214 | } | |
215 | ||
216 | /* Flush kernel page from TLB. */ | |
217 | static inline void flush_tlb_kernel_page (unsigned long addr) | |
218 | { | |
219 | sun3_put_segmap (addr & ~(SUN3_PMEG_SIZE - 1), SUN3_INVALID_PMEG); | |
220 | } | |
221 | ||
222 | static inline void flush_tlb_pgtables(struct mm_struct *mm, | |
223 | unsigned long start, unsigned long end) | |
224 | { | |
225 | } | |
226 | ||
227 | #endif | |
228 | ||
229 | #endif /* _M68K_TLBFLUSH_H */ |