Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / arch / m68k / include / asm / tlbflush.h
1 #ifndef _M68K_TLBFLUSH_H
2 #define _M68K_TLBFLUSH_H
3
4 #ifdef CONFIG_MMU
5 #ifndef CONFIG_SUN3
6
7 #include <asm/current.h>
8 #include <asm/mcfmmu.h>
9
10 static inline void flush_tlb_kernel_page(void *addr)
11 {
12         if (CPU_IS_COLDFIRE) {
13                 mmu_write(MMUOR, MMUOR_CNL);
14         } else if (CPU_IS_040_OR_060) {
15                 mm_segment_t old_fs = get_fs();
16                 set_fs(KERNEL_DS);
17                 __asm__ __volatile__(".chip 68040\n\t"
18                                      "pflush (%0)\n\t"
19                                      ".chip 68k"
20                                      : : "a" (addr));
21                 set_fs(old_fs);
22         } else if (CPU_IS_020_OR_030)
23                 __asm__ __volatile__("pflush #4,#4,(%0)" : : "a" (addr));
24 }
25
26 /*
27  * flush all user-space atc entries.
28  */
29 static inline void __flush_tlb(void)
30 {
31         if (CPU_IS_COLDFIRE) {
32                 mmu_write(MMUOR, MMUOR_CNL);
33         } else if (CPU_IS_040_OR_060) {
34                 __asm__ __volatile__(".chip 68040\n\t"
35                                      "pflushan\n\t"
36                                      ".chip 68k");
37         } else if (CPU_IS_020_OR_030) {
38                 __asm__ __volatile__("pflush #0,#4");
39         }
40 }
41
42 static inline void __flush_tlb040_one(unsigned long addr)
43 {
44         __asm__ __volatile__(".chip 68040\n\t"
45                              "pflush (%0)\n\t"
46                              ".chip 68k"
47                              : : "a" (addr));
48 }
49
50 static inline void __flush_tlb_one(unsigned long addr)
51 {
52         if (CPU_IS_COLDFIRE)
53                 mmu_write(MMUOR, MMUOR_CNL);
54         else if (CPU_IS_040_OR_060)
55                 __flush_tlb040_one(addr);
56         else if (CPU_IS_020_OR_030)
57                 __asm__ __volatile__("pflush #0,#4,(%0)" : : "a" (addr));
58 }
59
60 #define flush_tlb() __flush_tlb()
61
62 /*
63  * flush all atc entries (both kernel and user-space entries).
64  */
65 static inline void flush_tlb_all(void)
66 {
67         if (CPU_IS_COLDFIRE) {
68                 mmu_write(MMUOR, MMUOR_CNL);
69         } else if (CPU_IS_040_OR_060) {
70                 __asm__ __volatile__(".chip 68040\n\t"
71                                      "pflusha\n\t"
72                                      ".chip 68k");
73         } else if (CPU_IS_020_OR_030) {
74                 __asm__ __volatile__("pflusha");
75         }
76 }
77
78 static inline void flush_tlb_mm(struct mm_struct *mm)
79 {
80         if (mm == current->active_mm)
81                 __flush_tlb();
82 }
83
84 static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
85 {
86         if (vma->vm_mm == current->active_mm) {
87                 mm_segment_t old_fs = get_fs();
88                 set_fs(USER_DS);
89                 __flush_tlb_one(addr);
90                 set_fs(old_fs);
91         }
92 }
93
94 static inline void flush_tlb_range(struct vm_area_struct *vma,
95                                    unsigned long start, unsigned long end)
96 {
97         if (vma->vm_mm == current->active_mm)
98                 __flush_tlb();
99 }
100
101 static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
102 {
103         flush_tlb_all();
104 }
105
106 #else
107
108
109 /* Reserved PMEGs. */
110 extern char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
111 extern unsigned long pmeg_vaddr[SUN3_PMEGS_NUM];
112 extern unsigned char pmeg_alloc[SUN3_PMEGS_NUM];
113 extern unsigned char pmeg_ctx[SUN3_PMEGS_NUM];
114
115 /* Flush all userspace mappings one by one...  (why no flush command,
116    sun?) */
117 static inline void flush_tlb_all(void)
118 {
119        unsigned long addr;
120        unsigned char ctx, oldctx;
121
122        oldctx = sun3_get_context();
123        for(addr = 0x00000000; addr < TASK_SIZE; addr += SUN3_PMEG_SIZE) {
124                for(ctx = 0; ctx < 8; ctx++) {
125                        sun3_put_context(ctx);
126                        sun3_put_segmap(addr, SUN3_INVALID_PMEG);
127                }
128        }
129
130        sun3_put_context(oldctx);
131        /* erase all of the userspace pmeg maps, we've clobbered them
132           all anyway */
133        for(addr = 0; addr < SUN3_INVALID_PMEG; addr++) {
134                if(pmeg_alloc[addr] == 1) {
135                        pmeg_alloc[addr] = 0;
136                        pmeg_ctx[addr] = 0;
137                        pmeg_vaddr[addr] = 0;
138                }
139        }
140
141 }
142
143 /* Clear user TLB entries within the context named in mm */
144 static inline void flush_tlb_mm (struct mm_struct *mm)
145 {
146      unsigned char oldctx;
147      unsigned char seg;
148      unsigned long i;
149
150      oldctx = sun3_get_context();
151      sun3_put_context(mm->context);
152
153      for(i = 0; i < TASK_SIZE; i += SUN3_PMEG_SIZE) {
154              seg = sun3_get_segmap(i);
155              if(seg == SUN3_INVALID_PMEG)
156                      continue;
157
158              sun3_put_segmap(i, SUN3_INVALID_PMEG);
159              pmeg_alloc[seg] = 0;
160              pmeg_ctx[seg] = 0;
161              pmeg_vaddr[seg] = 0;
162      }
163
164      sun3_put_context(oldctx);
165
166 }
167
168 /* Flush a single TLB page. In this case, we're limited to flushing a
169    single PMEG */
170 static inline void flush_tlb_page (struct vm_area_struct *vma,
171                                    unsigned long addr)
172 {
173         unsigned char oldctx;
174         unsigned char i;
175
176         oldctx = sun3_get_context();
177         sun3_put_context(vma->vm_mm->context);
178         addr &= ~SUN3_PMEG_MASK;
179         if((i = sun3_get_segmap(addr)) != SUN3_INVALID_PMEG)
180         {
181                 pmeg_alloc[i] = 0;
182                 pmeg_ctx[i] = 0;
183                 pmeg_vaddr[i] = 0;
184                 sun3_put_segmap (addr,  SUN3_INVALID_PMEG);
185         }
186         sun3_put_context(oldctx);
187
188 }
189 /* Flush a range of pages from TLB. */
190
191 static inline void flush_tlb_range (struct vm_area_struct *vma,
192                       unsigned long start, unsigned long end)
193 {
194         struct mm_struct *mm = vma->vm_mm;
195         unsigned char seg, oldctx;
196
197         start &= ~SUN3_PMEG_MASK;
198
199         oldctx = sun3_get_context();
200         sun3_put_context(mm->context);
201
202         while(start < end)
203         {
204                 if((seg = sun3_get_segmap(start)) == SUN3_INVALID_PMEG)
205                      goto next;
206                 if(pmeg_ctx[seg] == mm->context) {
207                         pmeg_alloc[seg] = 0;
208                         pmeg_ctx[seg] = 0;
209                         pmeg_vaddr[seg] = 0;
210                 }
211                 sun3_put_segmap(start, SUN3_INVALID_PMEG);
212         next:
213                 start += SUN3_PMEG_SIZE;
214         }
215 }
216
217 static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
218 {
219         flush_tlb_all();
220 }
221
222 /* Flush kernel page from TLB. */
223 static inline void flush_tlb_kernel_page (unsigned long addr)
224 {
225         sun3_put_segmap (addr & ~(SUN3_PMEG_SIZE - 1), SUN3_INVALID_PMEG);
226 }
227
228 #endif
229
230 #else /* !CONFIG_MMU */
231
232 /*
233  * flush all user-space atc entries.
234  */
235 static inline void __flush_tlb(void)
236 {
237         BUG();
238 }
239
240 static inline void __flush_tlb_one(unsigned long addr)
241 {
242         BUG();
243 }
244
245 #define flush_tlb() __flush_tlb()
246
247 /*
248  * flush all atc entries (both kernel and user-space entries).
249  */
250 static inline void flush_tlb_all(void)
251 {
252         BUG();
253 }
254
255 static inline void flush_tlb_mm(struct mm_struct *mm)
256 {
257         BUG();
258 }
259
260 static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
261 {
262         BUG();
263 }
264
265 static inline void flush_tlb_range(struct mm_struct *mm,
266                                    unsigned long start, unsigned long end)
267 {
268         BUG();
269 }
270
271 static inline void flush_tlb_kernel_page(unsigned long addr)
272 {
273         BUG();
274 }
275
276 #endif /* CONFIG_MMU */
277
278 #endif /* _M68K_TLBFLUSH_H */