Commit | Line | Data |
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1da177e4 | 1 | /* |
4baa9922 | 2 | * arch/arm/include/asm/tlbflush.h |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 1999-2003 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #ifndef _ASMARM_TLBFLUSH_H | |
11 | #define _ASMARM_TLBFLUSH_H | |
12 | ||
58e9c47f | 13 | #ifdef CONFIG_MMU |
0157903e | 14 | |
1da177e4 LT |
15 | #include <asm/glue.h> |
16 | ||
1da177e4 LT |
17 | #define TLB_V4_U_PAGE (1 << 1) |
18 | #define TLB_V4_D_PAGE (1 << 2) | |
19 | #define TLB_V4_I_PAGE (1 << 3) | |
20 | #define TLB_V6_U_PAGE (1 << 4) | |
21 | #define TLB_V6_D_PAGE (1 << 5) | |
22 | #define TLB_V6_I_PAGE (1 << 6) | |
23 | ||
1da177e4 LT |
24 | #define TLB_V4_U_FULL (1 << 9) |
25 | #define TLB_V4_D_FULL (1 << 10) | |
26 | #define TLB_V4_I_FULL (1 << 11) | |
27 | #define TLB_V6_U_FULL (1 << 12) | |
28 | #define TLB_V6_D_FULL (1 << 13) | |
29 | #define TLB_V6_I_FULL (1 << 14) | |
30 | ||
31 | #define TLB_V6_U_ASID (1 << 16) | |
32 | #define TLB_V6_D_ASID (1 << 17) | |
33 | #define TLB_V6_I_ASID (1 << 18) | |
34 | ||
862c588f WD |
35 | #define TLB_V6_BP (1 << 19) |
36 | ||
faa7bc51 | 37 | /* Unified Inner Shareable TLB operations (ARMv7 MP extensions) */ |
862c588f WD |
38 | #define TLB_V7_UIS_PAGE (1 << 20) |
39 | #define TLB_V7_UIS_FULL (1 << 21) | |
40 | #define TLB_V7_UIS_ASID (1 << 22) | |
41 | #define TLB_V7_UIS_BP (1 << 23) | |
faa7bc51 | 42 | |
4348810a | 43 | #define TLB_BARRIER (1 << 28) |
99c6dc11 | 44 | #define TLB_L2CLEAN_FR (1 << 29) /* Feroceon */ |
1da177e4 LT |
45 | #define TLB_DCLEAN (1 << 30) |
46 | #define TLB_WB (1 << 31) | |
47 | ||
48 | /* | |
49 | * MMU TLB Model | |
50 | * ============= | |
51 | * | |
52 | * We have the following to choose from: | |
1da177e4 LT |
53 | * v4 - ARMv4 without write buffer |
54 | * v4wb - ARMv4 with write buffer without I TLB flush entry instruction | |
55 | * v4wbi - ARMv4 with write buffer with I TLB flush entry instruction | |
99c6dc11 | 56 | * fr - Feroceon (v4wbi with non-outer-cacheable page table walks) |
4348810a | 57 | * fa - Faraday (v4 with write buffer with UTLB) |
1da177e4 | 58 | * v6wbi - ARMv6 with write buffer with I TLB flush entry instruction |
61db7fb1 | 59 | * v7wbi - identical to v6wbi |
1da177e4 LT |
60 | */ |
61 | #undef _TLB | |
62 | #undef MULTI_TLB | |
63 | ||
f00ec48f RK |
64 | #ifdef CONFIG_SMP_ON_UP |
65 | #define MULTI_TLB 1 | |
66 | #endif | |
67 | ||
1da177e4 LT |
68 | #define v4_tlb_flags (TLB_V4_U_FULL | TLB_V4_U_PAGE) |
69 | ||
70 | #ifdef CONFIG_CPU_TLB_V4WT | |
71 | # define v4_possible_flags v4_tlb_flags | |
72 | # define v4_always_flags v4_tlb_flags | |
73 | # ifdef _TLB | |
74 | # define MULTI_TLB 1 | |
75 | # else | |
76 | # define _TLB v4 | |
77 | # endif | |
78 | #else | |
79 | # define v4_possible_flags 0 | |
80 | # define v4_always_flags (-1UL) | |
81 | #endif | |
82 | ||
4348810a | 83 | #define fa_tlb_flags (TLB_WB | TLB_DCLEAN | TLB_BARRIER | \ |
28853ac8 PZ |
84 | TLB_V4_U_FULL | TLB_V4_U_PAGE) |
85 | ||
86 | #ifdef CONFIG_CPU_TLB_FA | |
87 | # define fa_possible_flags fa_tlb_flags | |
88 | # define fa_always_flags fa_tlb_flags | |
89 | # ifdef _TLB | |
90 | # define MULTI_TLB 1 | |
91 | # else | |
92 | # define _TLB fa | |
93 | # endif | |
94 | #else | |
95 | # define fa_possible_flags 0 | |
96 | # define fa_always_flags (-1UL) | |
97 | #endif | |
98 | ||
1da177e4 LT |
99 | #define v4wbi_tlb_flags (TLB_WB | TLB_DCLEAN | \ |
100 | TLB_V4_I_FULL | TLB_V4_D_FULL | \ | |
101 | TLB_V4_I_PAGE | TLB_V4_D_PAGE) | |
102 | ||
103 | #ifdef CONFIG_CPU_TLB_V4WBI | |
104 | # define v4wbi_possible_flags v4wbi_tlb_flags | |
105 | # define v4wbi_always_flags v4wbi_tlb_flags | |
106 | # ifdef _TLB | |
107 | # define MULTI_TLB 1 | |
108 | # else | |
109 | # define _TLB v4wbi | |
110 | # endif | |
111 | #else | |
112 | # define v4wbi_possible_flags 0 | |
113 | # define v4wbi_always_flags (-1UL) | |
114 | #endif | |
115 | ||
99c6dc11 LB |
116 | #define fr_tlb_flags (TLB_WB | TLB_DCLEAN | TLB_L2CLEAN_FR | \ |
117 | TLB_V4_I_FULL | TLB_V4_D_FULL | \ | |
118 | TLB_V4_I_PAGE | TLB_V4_D_PAGE) | |
119 | ||
120 | #ifdef CONFIG_CPU_TLB_FEROCEON | |
121 | # define fr_possible_flags fr_tlb_flags | |
122 | # define fr_always_flags fr_tlb_flags | |
123 | # ifdef _TLB | |
124 | # define MULTI_TLB 1 | |
125 | # else | |
126 | # define _TLB v4wbi | |
127 | # endif | |
128 | #else | |
129 | # define fr_possible_flags 0 | |
130 | # define fr_always_flags (-1UL) | |
131 | #endif | |
132 | ||
1da177e4 LT |
133 | #define v4wb_tlb_flags (TLB_WB | TLB_DCLEAN | \ |
134 | TLB_V4_I_FULL | TLB_V4_D_FULL | \ | |
135 | TLB_V4_D_PAGE) | |
136 | ||
137 | #ifdef CONFIG_CPU_TLB_V4WB | |
138 | # define v4wb_possible_flags v4wb_tlb_flags | |
139 | # define v4wb_always_flags v4wb_tlb_flags | |
140 | # ifdef _TLB | |
141 | # define MULTI_TLB 1 | |
142 | # else | |
143 | # define _TLB v4wb | |
144 | # endif | |
145 | #else | |
146 | # define v4wb_possible_flags 0 | |
147 | # define v4wb_always_flags (-1UL) | |
148 | #endif | |
149 | ||
4348810a | 150 | #define v6wbi_tlb_flags (TLB_WB | TLB_DCLEAN | TLB_BARRIER | \ |
1da177e4 LT |
151 | TLB_V6_I_FULL | TLB_V6_D_FULL | \ |
152 | TLB_V6_I_PAGE | TLB_V6_D_PAGE | \ | |
862c588f WD |
153 | TLB_V6_I_ASID | TLB_V6_D_ASID | \ |
154 | TLB_V6_BP) | |
1da177e4 LT |
155 | |
156 | #ifdef CONFIG_CPU_TLB_V6 | |
157 | # define v6wbi_possible_flags v6wbi_tlb_flags | |
158 | # define v6wbi_always_flags v6wbi_tlb_flags | |
159 | # ifdef _TLB | |
160 | # define MULTI_TLB 1 | |
161 | # else | |
162 | # define _TLB v6wbi | |
163 | # endif | |
164 | #else | |
165 | # define v6wbi_possible_flags 0 | |
166 | # define v6wbi_always_flags (-1UL) | |
167 | #endif | |
168 | ||
ae8a8b95 | 169 | #define v7wbi_tlb_flags_smp (TLB_WB | TLB_BARRIER | \ |
862c588f WD |
170 | TLB_V7_UIS_FULL | TLB_V7_UIS_PAGE | \ |
171 | TLB_V7_UIS_ASID | TLB_V7_UIS_BP) | |
4348810a | 172 | #define v7wbi_tlb_flags_up (TLB_WB | TLB_DCLEAN | TLB_BARRIER | \ |
862c588f WD |
173 | TLB_V6_U_FULL | TLB_V6_U_PAGE | \ |
174 | TLB_V6_U_ASID | TLB_V6_BP) | |
faa7bc51 | 175 | |
2ccdd1e7 | 176 | #ifdef CONFIG_CPU_TLB_V7 |
f00ec48f RK |
177 | |
178 | # ifdef CONFIG_SMP_ON_UP | |
179 | # define v7wbi_possible_flags (v7wbi_tlb_flags_smp | v7wbi_tlb_flags_up) | |
180 | # define v7wbi_always_flags (v7wbi_tlb_flags_smp & v7wbi_tlb_flags_up) | |
181 | # elif defined(CONFIG_SMP) | |
182 | # define v7wbi_possible_flags v7wbi_tlb_flags_smp | |
183 | # define v7wbi_always_flags v7wbi_tlb_flags_smp | |
184 | # else | |
185 | # define v7wbi_possible_flags v7wbi_tlb_flags_up | |
186 | # define v7wbi_always_flags v7wbi_tlb_flags_up | |
187 | # endif | |
2ccdd1e7 CM |
188 | # ifdef _TLB |
189 | # define MULTI_TLB 1 | |
190 | # else | |
191 | # define _TLB v7wbi | |
192 | # endif | |
193 | #else | |
194 | # define v7wbi_possible_flags 0 | |
195 | # define v7wbi_always_flags (-1UL) | |
196 | #endif | |
197 | ||
1da177e4 LT |
198 | #ifndef _TLB |
199 | #error Unknown TLB model | |
200 | #endif | |
201 | ||
202 | #ifndef __ASSEMBLY__ | |
203 | ||
e8edc6e0 AD |
204 | #include <linux/sched.h> |
205 | ||
1da177e4 LT |
206 | struct cpu_tlb_fns { |
207 | void (*flush_user_range)(unsigned long, unsigned long, struct vm_area_struct *); | |
208 | void (*flush_kern_range)(unsigned long, unsigned long); | |
209 | unsigned long tlb_flags; | |
210 | }; | |
211 | ||
212 | /* | |
213 | * Select the calling method | |
214 | */ | |
215 | #ifdef MULTI_TLB | |
216 | ||
217 | #define __cpu_flush_user_tlb_range cpu_tlb.flush_user_range | |
218 | #define __cpu_flush_kern_tlb_range cpu_tlb.flush_kern_range | |
219 | ||
220 | #else | |
221 | ||
222 | #define __cpu_flush_user_tlb_range __glue(_TLB,_flush_user_tlb_range) | |
223 | #define __cpu_flush_kern_tlb_range __glue(_TLB,_flush_kern_tlb_range) | |
224 | ||
225 | extern void __cpu_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *); | |
226 | extern void __cpu_flush_kern_tlb_range(unsigned long, unsigned long); | |
227 | ||
228 | #endif | |
229 | ||
230 | extern struct cpu_tlb_fns cpu_tlb; | |
231 | ||
232 | #define __cpu_tlb_flags cpu_tlb.tlb_flags | |
233 | ||
234 | /* | |
235 | * TLB Management | |
236 | * ============== | |
237 | * | |
238 | * The arch/arm/mm/tlb-*.S files implement these methods. | |
239 | * | |
240 | * The TLB specific code is expected to perform whatever tests it | |
241 | * needs to determine if it should invalidate the TLB for each | |
242 | * call. Start addresses are inclusive and end addresses are | |
243 | * exclusive; it is safe to round these addresses down. | |
244 | * | |
245 | * flush_tlb_all() | |
246 | * | |
247 | * Invalidate the entire TLB. | |
248 | * | |
249 | * flush_tlb_mm(mm) | |
250 | * | |
251 | * Invalidate all TLB entries in a particular address | |
252 | * space. | |
253 | * - mm - mm_struct describing address space | |
254 | * | |
255 | * flush_tlb_range(mm,start,end) | |
256 | * | |
257 | * Invalidate a range of TLB entries in the specified | |
258 | * address space. | |
259 | * - mm - mm_struct describing address space | |
260 | * - start - start address (may not be aligned) | |
261 | * - end - end address (exclusive, may not be aligned) | |
262 | * | |
263 | * flush_tlb_page(vaddr,vma) | |
264 | * | |
265 | * Invalidate the specified page in the specified address range. | |
266 | * - vaddr - virtual address (may not be aligned) | |
267 | * - vma - vma_struct describing address range | |
268 | * | |
269 | * flush_kern_tlb_page(kaddr) | |
270 | * | |
271 | * Invalidate the TLB entry for the specified page. The address | |
272 | * will be in the kernels virtual memory space. Current uses | |
273 | * only require the D-TLB to be invalidated. | |
274 | * - kaddr - Kernel virtual memory address | |
275 | */ | |
276 | ||
277 | /* | |
278 | * We optimise the code below by: | |
279 | * - building a set of TLB flags that might be set in __cpu_tlb_flags | |
280 | * - building a set of TLB flags that will always be set in __cpu_tlb_flags | |
281 | * - if we're going to need __cpu_tlb_flags, access it once and only once | |
282 | * | |
283 | * This allows us to build optimal assembly for the single-CPU type case, | |
284 | * and as close to optimal given the compiler constrants for multi-CPU | |
285 | * case. We could do better for the multi-CPU case if the compiler | |
286 | * implemented the "%?" method, but this has been discontinued due to too | |
287 | * many people getting it wrong. | |
288 | */ | |
357c9c1f | 289 | #define possible_tlb_flags (v4_possible_flags | \ |
1da177e4 | 290 | v4wbi_possible_flags | \ |
99c6dc11 | 291 | fr_possible_flags | \ |
1da177e4 | 292 | v4wb_possible_flags | \ |
28853ac8 | 293 | fa_possible_flags | \ |
61db7fb1 PW |
294 | v6wbi_possible_flags | \ |
295 | v7wbi_possible_flags) | |
1da177e4 | 296 | |
357c9c1f | 297 | #define always_tlb_flags (v4_always_flags & \ |
1da177e4 | 298 | v4wbi_always_flags & \ |
99c6dc11 | 299 | fr_always_flags & \ |
1da177e4 | 300 | v4wb_always_flags & \ |
28853ac8 | 301 | fa_always_flags & \ |
61db7fb1 PW |
302 | v6wbi_always_flags & \ |
303 | v7wbi_always_flags) | |
1da177e4 LT |
304 | |
305 | #define tlb_flag(f) ((always_tlb_flags & (f)) || (__tlb_flag & possible_tlb_flags & (f))) | |
306 | ||
87067a93 RK |
307 | #define __tlb_op(f, insnarg, arg) \ |
308 | do { \ | |
309 | if (always_tlb_flags & (f)) \ | |
310 | asm("mcr " insnarg \ | |
311 | : : "r" (arg) : "cc"); \ | |
312 | else if (possible_tlb_flags & (f)) \ | |
313 | asm("tst %1, %2\n\t" \ | |
314 | "mcrne " insnarg \ | |
315 | : : "r" (arg), "r" (__tlb_flag), "Ir" (f) \ | |
316 | : "cc"); \ | |
317 | } while (0) | |
318 | ||
319 | #define tlb_op(f, regs, arg) __tlb_op(f, "p15, 0, %0, " regs, arg) | |
320 | #define tlb_l2_op(f, regs, arg) __tlb_op(f, "p15, 1, %0, " regs, arg) | |
321 | ||
603fff54 | 322 | static inline void local_flush_tlb_all(void) |
1da177e4 LT |
323 | { |
324 | const int zero = 0; | |
325 | const unsigned int __tlb_flag = __cpu_tlb_flags; | |
326 | ||
327 | if (tlb_flag(TLB_WB)) | |
e6a5d66f | 328 | dsb(); |
1da177e4 | 329 | |
87067a93 RK |
330 | tlb_op(TLB_V4_U_FULL | TLB_V6_U_FULL, "c8, c7, 0", zero); |
331 | tlb_op(TLB_V4_D_FULL | TLB_V6_D_FULL, "c8, c6, 0", zero); | |
332 | tlb_op(TLB_V4_I_FULL | TLB_V6_I_FULL, "c8, c5, 0", zero); | |
333 | tlb_op(TLB_V7_UIS_FULL, "c8, c3, 0", zero); | |
e6a5d66f | 334 | |
4348810a | 335 | if (tlb_flag(TLB_BARRIER)) { |
b8349b56 CM |
336 | dsb(); |
337 | isb(); | |
338 | } | |
1da177e4 LT |
339 | } |
340 | ||
603fff54 | 341 | static inline void local_flush_tlb_mm(struct mm_struct *mm) |
1da177e4 LT |
342 | { |
343 | const int zero = 0; | |
344 | const int asid = ASID(mm); | |
345 | const unsigned int __tlb_flag = __cpu_tlb_flags; | |
346 | ||
347 | if (tlb_flag(TLB_WB)) | |
e6a5d66f | 348 | dsb(); |
1da177e4 | 349 | |
4cc3daaf | 350 | if (possible_tlb_flags & (TLB_V4_U_FULL|TLB_V4_D_FULL|TLB_V4_I_FULL)) { |
87067a93 | 351 | if (cpumask_test_cpu(get_cpu(), mm_cpumask(mm))) { |
87067a93 RK |
352 | tlb_op(TLB_V4_U_FULL, "c8, c7, 0", zero); |
353 | tlb_op(TLB_V4_D_FULL, "c8, c6, 0", zero); | |
354 | tlb_op(TLB_V4_I_FULL, "c8, c5, 0", zero); | |
355 | } | |
356 | put_cpu(); | |
1da177e4 | 357 | } |
87067a93 RK |
358 | |
359 | tlb_op(TLB_V6_U_ASID, "c8, c7, 2", asid); | |
360 | tlb_op(TLB_V6_D_ASID, "c8, c6, 2", asid); | |
361 | tlb_op(TLB_V6_I_ASID, "c8, c5, 2", asid); | |
cdf357f1 | 362 | #ifdef CONFIG_ARM_ERRATA_720789 |
87067a93 | 363 | tlb_op(TLB_V7_UIS_ASID, "c8, c3, 0", zero); |
cdf357f1 | 364 | #else |
87067a93 | 365 | tlb_op(TLB_V7_UIS_ASID, "c8, c3, 2", asid); |
cdf357f1 | 366 | #endif |
e6a5d66f | 367 | |
4348810a | 368 | if (tlb_flag(TLB_BARRIER)) |
b8349b56 | 369 | dsb(); |
1da177e4 LT |
370 | } |
371 | ||
372 | static inline void | |
603fff54 | 373 | local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) |
1da177e4 LT |
374 | { |
375 | const int zero = 0; | |
376 | const unsigned int __tlb_flag = __cpu_tlb_flags; | |
377 | ||
378 | uaddr = (uaddr & PAGE_MASK) | ASID(vma->vm_mm); | |
379 | ||
380 | if (tlb_flag(TLB_WB)) | |
e6a5d66f | 381 | dsb(); |
1da177e4 | 382 | |
4cc3daaf | 383 | if (possible_tlb_flags & (TLB_V4_U_PAGE|TLB_V4_D_PAGE|TLB_V4_I_PAGE|TLB_V4_I_FULL) && |
87067a93 | 384 | cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) { |
87067a93 RK |
385 | tlb_op(TLB_V4_U_PAGE, "c8, c7, 1", uaddr); |
386 | tlb_op(TLB_V4_D_PAGE, "c8, c6, 1", uaddr); | |
387 | tlb_op(TLB_V4_I_PAGE, "c8, c5, 1", uaddr); | |
1da177e4 | 388 | if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL)) |
6a39dd62 | 389 | asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc"); |
1da177e4 LT |
390 | } |
391 | ||
87067a93 RK |
392 | tlb_op(TLB_V6_U_PAGE, "c8, c7, 1", uaddr); |
393 | tlb_op(TLB_V6_D_PAGE, "c8, c6, 1", uaddr); | |
394 | tlb_op(TLB_V6_I_PAGE, "c8, c5, 1", uaddr); | |
cdf357f1 | 395 | #ifdef CONFIG_ARM_ERRATA_720789 |
87067a93 | 396 | tlb_op(TLB_V7_UIS_PAGE, "c8, c3, 3", uaddr & PAGE_MASK); |
cdf357f1 | 397 | #else |
87067a93 | 398 | tlb_op(TLB_V7_UIS_PAGE, "c8, c3, 1", uaddr); |
cdf357f1 | 399 | #endif |
e6a5d66f | 400 | |
4348810a | 401 | if (tlb_flag(TLB_BARRIER)) |
b8349b56 | 402 | dsb(); |
1da177e4 LT |
403 | } |
404 | ||
603fff54 | 405 | static inline void local_flush_tlb_kernel_page(unsigned long kaddr) |
1da177e4 LT |
406 | { |
407 | const int zero = 0; | |
408 | const unsigned int __tlb_flag = __cpu_tlb_flags; | |
409 | ||
410 | kaddr &= PAGE_MASK; | |
411 | ||
412 | if (tlb_flag(TLB_WB)) | |
e6a5d66f | 413 | dsb(); |
1da177e4 | 414 | |
87067a93 RK |
415 | tlb_op(TLB_V4_U_PAGE, "c8, c7, 1", kaddr); |
416 | tlb_op(TLB_V4_D_PAGE, "c8, c6, 1", kaddr); | |
417 | tlb_op(TLB_V4_I_PAGE, "c8, c5, 1", kaddr); | |
1da177e4 | 418 | if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL)) |
6a39dd62 | 419 | asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc"); |
1da177e4 | 420 | |
87067a93 RK |
421 | tlb_op(TLB_V6_U_PAGE, "c8, c7, 1", kaddr); |
422 | tlb_op(TLB_V6_D_PAGE, "c8, c6, 1", kaddr); | |
423 | tlb_op(TLB_V6_I_PAGE, "c8, c5, 1", kaddr); | |
424 | tlb_op(TLB_V7_UIS_PAGE, "c8, c3, 1", kaddr); | |
6a0e2430 | 425 | |
4348810a | 426 | if (tlb_flag(TLB_BARRIER)) { |
b8349b56 CM |
427 | dsb(); |
428 | isb(); | |
429 | } | |
1da177e4 LT |
430 | } |
431 | ||
862c588f WD |
432 | static inline void local_flush_bp_all(void) |
433 | { | |
434 | const int zero = 0; | |
435 | const unsigned int __tlb_flag = __cpu_tlb_flags; | |
436 | ||
437 | if (tlb_flag(TLB_V7_UIS_BP)) | |
438 | asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero)); | |
439 | else if (tlb_flag(TLB_V6_BP)) | |
440 | asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero)); | |
441 | ||
442 | if (tlb_flag(TLB_BARRIER)) | |
443 | isb(); | |
444 | } | |
445 | ||
1f49856b | 446 | #include <asm/cputype.h> |
93dc6887 | 447 | #ifdef CONFIG_ARM_ERRATA_798181 |
1f49856b FE |
448 | static inline int erratum_a15_798181(void) |
449 | { | |
450 | unsigned int midr = read_cpuid_id(); | |
451 | ||
452 | /* Cortex-A15 r0p0..r3p2 affected */ | |
453 | if ((midr & 0xff0ffff0) != 0x410fc0f0 || midr > 0x413fc0f2) | |
454 | return 0; | |
455 | return 1; | |
456 | } | |
457 | ||
93dc6887 CM |
458 | static inline void dummy_flush_tlb_a15_erratum(void) |
459 | { | |
460 | /* | |
461 | * Dummy TLBIMVAIS. Using the unmapped address 0 and ASID 0. | |
462 | */ | |
463 | asm("mcr p15, 0, %0, c8, c3, 1" : : "r" (0)); | |
464 | dsb(); | |
465 | } | |
466 | #else | |
1f49856b FE |
467 | static inline int erratum_a15_798181(void) |
468 | { | |
469 | return 0; | |
470 | } | |
471 | ||
93dc6887 CM |
472 | static inline void dummy_flush_tlb_a15_erratum(void) |
473 | { | |
474 | } | |
475 | #endif | |
476 | ||
1da177e4 LT |
477 | /* |
478 | * flush_pmd_entry | |
479 | * | |
480 | * Flush a PMD entry (word aligned, or double-word aligned) to | |
481 | * RAM if the TLB for the CPU we are running on requires this. | |
482 | * This is typically used when we are creating PMD entries. | |
483 | * | |
484 | * clean_pmd_entry | |
485 | * | |
486 | * Clean (but don't drain the write buffer) if the CPU requires | |
487 | * these operations. This is typically used when we are removing | |
488 | * PMD entries. | |
489 | */ | |
442e70c0 | 490 | static inline void flush_pmd_entry(void *pmd) |
1da177e4 | 491 | { |
1da177e4 LT |
492 | const unsigned int __tlb_flag = __cpu_tlb_flags; |
493 | ||
87067a93 RK |
494 | tlb_op(TLB_DCLEAN, "c7, c10, 1 @ flush_pmd", pmd); |
495 | tlb_l2_op(TLB_L2CLEAN_FR, "c15, c9, 1 @ L2 flush_pmd", pmd); | |
99c6dc11 | 496 | |
1da177e4 | 497 | if (tlb_flag(TLB_WB)) |
e6a5d66f | 498 | dsb(); |
1da177e4 LT |
499 | } |
500 | ||
442e70c0 | 501 | static inline void clean_pmd_entry(void *pmd) |
1da177e4 LT |
502 | { |
503 | const unsigned int __tlb_flag = __cpu_tlb_flags; | |
504 | ||
87067a93 RK |
505 | tlb_op(TLB_DCLEAN, "c7, c10, 1 @ flush_pmd", pmd); |
506 | tlb_l2_op(TLB_L2CLEAN_FR, "c15, c9, 1 @ L2 flush_pmd", pmd); | |
1da177e4 LT |
507 | } |
508 | ||
87067a93 | 509 | #undef tlb_op |
1da177e4 LT |
510 | #undef tlb_flag |
511 | #undef always_tlb_flags | |
512 | #undef possible_tlb_flags | |
513 | ||
514 | /* | |
515 | * Convert calls to our calling convention. | |
516 | */ | |
603fff54 RK |
517 | #define local_flush_tlb_range(vma,start,end) __cpu_flush_user_tlb_range(start,end,vma) |
518 | #define local_flush_tlb_kernel_range(s,e) __cpu_flush_kern_tlb_range(s,e) | |
519 | ||
520 | #ifndef CONFIG_SMP | |
521 | #define flush_tlb_all local_flush_tlb_all | |
522 | #define flush_tlb_mm local_flush_tlb_mm | |
523 | #define flush_tlb_page local_flush_tlb_page | |
524 | #define flush_tlb_kernel_page local_flush_tlb_kernel_page | |
525 | #define flush_tlb_range local_flush_tlb_range | |
526 | #define flush_tlb_kernel_range local_flush_tlb_kernel_range | |
862c588f | 527 | #define flush_bp_all local_flush_bp_all |
603fff54 RK |
528 | #else |
529 | extern void flush_tlb_all(void); | |
530 | extern void flush_tlb_mm(struct mm_struct *mm); | |
531 | extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr); | |
532 | extern void flush_tlb_kernel_page(unsigned long kaddr); | |
533 | extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end); | |
534 | extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); | |
862c588f | 535 | extern void flush_bp_all(void); |
603fff54 | 536 | #endif |
1da177e4 LT |
537 | |
538 | /* | |
c0177800 | 539 | * If PG_dcache_clean is not set for the page, we need to ensure that any |
1da177e4 | 540 | * cache entries for the kernels virtual memory range are written |
6012191a CM |
541 | * back to the page. On ARMv6 and later, the cache coherency is handled via |
542 | * the set_pte_at() function. | |
1da177e4 | 543 | */ |
6012191a | 544 | #if __LINUX_ARM_ARCH__ < 6 |
4b3073e1 RK |
545 | extern void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, |
546 | pte_t *ptep); | |
6012191a CM |
547 | #else |
548 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
549 | unsigned long addr, pte_t *ptep) | |
550 | { | |
551 | } | |
552 | #endif | |
1da177e4 | 553 | |
8d962507 CM |
554 | #define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) |
555 | ||
1da177e4 LT |
556 | #endif |
557 | ||
5c709e69 WD |
558 | #elif defined(CONFIG_SMP) /* !CONFIG_MMU */ |
559 | ||
560 | #ifndef __ASSEMBLY__ | |
561 | ||
562 | #include <linux/mm_types.h> | |
563 | ||
564 | static inline void local_flush_tlb_all(void) { } | |
565 | static inline void local_flush_tlb_mm(struct mm_struct *mm) { } | |
566 | static inline void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) { } | |
567 | static inline void local_flush_tlb_kernel_page(unsigned long kaddr) { } | |
568 | static inline void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { } | |
569 | static inline void local_flush_tlb_kernel_range(unsigned long start, unsigned long end) { } | |
8d655d83 | 570 | static inline void local_flush_bp_all(void) { } |
5c709e69 WD |
571 | |
572 | extern void flush_tlb_all(void); | |
573 | extern void flush_tlb_mm(struct mm_struct *mm); | |
574 | extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr); | |
575 | extern void flush_tlb_kernel_page(unsigned long kaddr); | |
576 | extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end); | |
577 | extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); | |
8d655d83 | 578 | extern void flush_bp_all(void); |
5c709e69 WD |
579 | #endif /* __ASSEMBLY__ */ |
580 | ||
581 | #endif | |
0157903e | 582 | |
1da177e4 | 583 | #endif |