Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
79add627 | 6 | * Copyright (C) 1996 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
7 | * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Ralf Baechle (ralf@gnu.org) |
8 | * Copyright (C) 1999, 2000 Silicon Graphics, Inc. | |
9 | */ | |
a754f708 | 10 | #include <linux/hardirq.h> |
1da177e4 | 11 | #include <linux/init.h> |
db813fe5 | 12 | #include <linux/highmem.h> |
1da177e4 | 13 | #include <linux/kernel.h> |
641e97f3 | 14 | #include <linux/linkage.h> |
ff522058 | 15 | #include <linux/preempt.h> |
1da177e4 | 16 | #include <linux/sched.h> |
631330f5 | 17 | #include <linux/smp.h> |
1da177e4 | 18 | #include <linux/mm.h> |
35133692 | 19 | #include <linux/module.h> |
1da177e4 LT |
20 | #include <linux/bitops.h> |
21 | ||
22 | #include <asm/bcache.h> | |
23 | #include <asm/bootinfo.h> | |
ec74e361 | 24 | #include <asm/cache.h> |
1da177e4 LT |
25 | #include <asm/cacheops.h> |
26 | #include <asm/cpu.h> | |
27 | #include <asm/cpu-features.h> | |
69f24d17 | 28 | #include <asm/cpu-type.h> |
1da177e4 LT |
29 | #include <asm/io.h> |
30 | #include <asm/page.h> | |
31 | #include <asm/pgtable.h> | |
32 | #include <asm/r4kcache.h> | |
e001e528 | 33 | #include <asm/sections.h> |
1da177e4 LT |
34 | #include <asm/mmu_context.h> |
35 | #include <asm/war.h> | |
ba5187db | 36 | #include <asm/cacheflush.h> /* for run_uncached() */ |
9cd9669b | 37 | #include <asm/traps.h> |
b6d92b4a | 38 | #include <asm/dma-coherence.h> |
7f3f1d01 RB |
39 | |
40 | /* | |
41 | * Special Variant of smp_call_function for use by cache functions: | |
42 | * | |
43 | * o No return value | |
44 | * o collapses to normal function call on UP kernels | |
45 | * o collapses to normal function call on systems with a single shared | |
46 | * primary cache. | |
c8c5f3fd | 47 | * o doesn't disable interrupts on the local CPU |
7f3f1d01 | 48 | */ |
48a26e60 | 49 | static inline void r4k_on_each_cpu(void (*func) (void *info), void *info) |
7f3f1d01 RB |
50 | { |
51 | preempt_disable(); | |
52 | ||
53 | #if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC) | |
48a26e60 | 54 | smp_call_function(func, info, 1); |
7f3f1d01 RB |
55 | #endif |
56 | func(info); | |
57 | preempt_enable(); | |
58 | } | |
59 | ||
39b8d525 RB |
60 | #if defined(CONFIG_MIPS_CMP) |
61 | #define cpu_has_safe_index_cacheops 0 | |
62 | #else | |
63 | #define cpu_has_safe_index_cacheops 1 | |
64 | #endif | |
65 | ||
ec74e361 RB |
66 | /* |
67 | * Must die. | |
68 | */ | |
69 | static unsigned long icache_size __read_mostly; | |
70 | static unsigned long dcache_size __read_mostly; | |
71 | static unsigned long scache_size __read_mostly; | |
1da177e4 LT |
72 | |
73 | /* | |
74 | * Dummy cache handling routines for machines without boardcaches | |
75 | */ | |
73f40352 | 76 | static void cache_noop(void) {} |
1da177e4 LT |
77 | |
78 | static struct bcache_ops no_sc_ops = { | |
73f40352 CD |
79 | .bc_enable = (void *)cache_noop, |
80 | .bc_disable = (void *)cache_noop, | |
81 | .bc_wback_inv = (void *)cache_noop, | |
82 | .bc_inv = (void *)cache_noop | |
1da177e4 LT |
83 | }; |
84 | ||
85 | struct bcache_ops *bcops = &no_sc_ops; | |
86 | ||
330cfe01 TS |
87 | #define cpu_is_r4600_v1_x() ((read_c0_prid() & 0xfffffff0) == 0x00002010) |
88 | #define cpu_is_r4600_v2_x() ((read_c0_prid() & 0xfffffff0) == 0x00002020) | |
1da177e4 LT |
89 | |
90 | #define R4600_HIT_CACHEOP_WAR_IMPL \ | |
91 | do { \ | |
92 | if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x()) \ | |
93 | *(volatile unsigned long *)CKSEG1; \ | |
94 | if (R4600_V1_HIT_CACHEOP_WAR) \ | |
95 | __asm__ __volatile__("nop;nop;nop;nop"); \ | |
96 | } while (0) | |
97 | ||
98 | static void (*r4k_blast_dcache_page)(unsigned long addr); | |
99 | ||
100 | static inline void r4k_blast_dcache_page_dc32(unsigned long addr) | |
101 | { | |
102 | R4600_HIT_CACHEOP_WAR_IMPL; | |
103 | blast_dcache32_page(addr); | |
104 | } | |
105 | ||
605b7ef7 KC |
106 | static inline void r4k_blast_dcache_page_dc64(unsigned long addr) |
107 | { | |
108 | R4600_HIT_CACHEOP_WAR_IMPL; | |
109 | blast_dcache64_page(addr); | |
110 | } | |
111 | ||
078a55fc | 112 | static void r4k_blast_dcache_page_setup(void) |
1da177e4 LT |
113 | { |
114 | unsigned long dc_lsize = cpu_dcache_line_size(); | |
115 | ||
73f40352 CD |
116 | if (dc_lsize == 0) |
117 | r4k_blast_dcache_page = (void *)cache_noop; | |
118 | else if (dc_lsize == 16) | |
1da177e4 LT |
119 | r4k_blast_dcache_page = blast_dcache16_page; |
120 | else if (dc_lsize == 32) | |
121 | r4k_blast_dcache_page = r4k_blast_dcache_page_dc32; | |
605b7ef7 KC |
122 | else if (dc_lsize == 64) |
123 | r4k_blast_dcache_page = r4k_blast_dcache_page_dc64; | |
1da177e4 LT |
124 | } |
125 | ||
126 | static void (* r4k_blast_dcache_page_indexed)(unsigned long addr); | |
127 | ||
078a55fc | 128 | static void r4k_blast_dcache_page_indexed_setup(void) |
1da177e4 LT |
129 | { |
130 | unsigned long dc_lsize = cpu_dcache_line_size(); | |
131 | ||
73f40352 CD |
132 | if (dc_lsize == 0) |
133 | r4k_blast_dcache_page_indexed = (void *)cache_noop; | |
134 | else if (dc_lsize == 16) | |
1da177e4 LT |
135 | r4k_blast_dcache_page_indexed = blast_dcache16_page_indexed; |
136 | else if (dc_lsize == 32) | |
137 | r4k_blast_dcache_page_indexed = blast_dcache32_page_indexed; | |
605b7ef7 KC |
138 | else if (dc_lsize == 64) |
139 | r4k_blast_dcache_page_indexed = blast_dcache64_page_indexed; | |
1da177e4 LT |
140 | } |
141 | ||
f2e3656d SL |
142 | void (* r4k_blast_dcache)(void); |
143 | EXPORT_SYMBOL(r4k_blast_dcache); | |
1da177e4 | 144 | |
078a55fc | 145 | static void r4k_blast_dcache_setup(void) |
1da177e4 LT |
146 | { |
147 | unsigned long dc_lsize = cpu_dcache_line_size(); | |
148 | ||
73f40352 CD |
149 | if (dc_lsize == 0) |
150 | r4k_blast_dcache = (void *)cache_noop; | |
151 | else if (dc_lsize == 16) | |
1da177e4 LT |
152 | r4k_blast_dcache = blast_dcache16; |
153 | else if (dc_lsize == 32) | |
154 | r4k_blast_dcache = blast_dcache32; | |
605b7ef7 KC |
155 | else if (dc_lsize == 64) |
156 | r4k_blast_dcache = blast_dcache64; | |
1da177e4 LT |
157 | } |
158 | ||
159 | /* force code alignment (used for TX49XX_ICACHE_INDEX_INV_WAR) */ | |
160 | #define JUMP_TO_ALIGN(order) \ | |
161 | __asm__ __volatile__( \ | |
162 | "b\t1f\n\t" \ | |
163 | ".align\t" #order "\n\t" \ | |
164 | "1:\n\t" \ | |
165 | ) | |
166 | #define CACHE32_UNROLL32_ALIGN JUMP_TO_ALIGN(10) /* 32 * 32 = 1024 */ | |
70342287 | 167 | #define CACHE32_UNROLL32_ALIGN2 JUMP_TO_ALIGN(11) |
1da177e4 LT |
168 | |
169 | static inline void blast_r4600_v1_icache32(void) | |
170 | { | |
171 | unsigned long flags; | |
172 | ||
173 | local_irq_save(flags); | |
174 | blast_icache32(); | |
175 | local_irq_restore(flags); | |
176 | } | |
177 | ||
178 | static inline void tx49_blast_icache32(void) | |
179 | { | |
180 | unsigned long start = INDEX_BASE; | |
181 | unsigned long end = start + current_cpu_data.icache.waysize; | |
182 | unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit; | |
183 | unsigned long ws_end = current_cpu_data.icache.ways << | |
70342287 | 184 | current_cpu_data.icache.waybit; |
1da177e4 LT |
185 | unsigned long ws, addr; |
186 | ||
187 | CACHE32_UNROLL32_ALIGN2; | |
188 | /* I'm in even chunk. blast odd chunks */ | |
42a3b4f2 RB |
189 | for (ws = 0; ws < ws_end; ws += ws_inc) |
190 | for (addr = start + 0x400; addr < end; addr += 0x400 * 2) | |
21a151d8 | 191 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
1da177e4 LT |
192 | CACHE32_UNROLL32_ALIGN; |
193 | /* I'm in odd chunk. blast even chunks */ | |
42a3b4f2 RB |
194 | for (ws = 0; ws < ws_end; ws += ws_inc) |
195 | for (addr = start; addr < end; addr += 0x400 * 2) | |
21a151d8 | 196 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
1da177e4 LT |
197 | } |
198 | ||
199 | static inline void blast_icache32_r4600_v1_page_indexed(unsigned long page) | |
200 | { | |
201 | unsigned long flags; | |
202 | ||
203 | local_irq_save(flags); | |
204 | blast_icache32_page_indexed(page); | |
205 | local_irq_restore(flags); | |
206 | } | |
207 | ||
208 | static inline void tx49_blast_icache32_page_indexed(unsigned long page) | |
209 | { | |
67a3f6de AN |
210 | unsigned long indexmask = current_cpu_data.icache.waysize - 1; |
211 | unsigned long start = INDEX_BASE + (page & indexmask); | |
1da177e4 LT |
212 | unsigned long end = start + PAGE_SIZE; |
213 | unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit; | |
214 | unsigned long ws_end = current_cpu_data.icache.ways << | |
70342287 | 215 | current_cpu_data.icache.waybit; |
1da177e4 LT |
216 | unsigned long ws, addr; |
217 | ||
218 | CACHE32_UNROLL32_ALIGN2; | |
219 | /* I'm in even chunk. blast odd chunks */ | |
42a3b4f2 RB |
220 | for (ws = 0; ws < ws_end; ws += ws_inc) |
221 | for (addr = start + 0x400; addr < end; addr += 0x400 * 2) | |
21a151d8 | 222 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
1da177e4 LT |
223 | CACHE32_UNROLL32_ALIGN; |
224 | /* I'm in odd chunk. blast even chunks */ | |
42a3b4f2 RB |
225 | for (ws = 0; ws < ws_end; ws += ws_inc) |
226 | for (addr = start; addr < end; addr += 0x400 * 2) | |
21a151d8 | 227 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
1da177e4 LT |
228 | } |
229 | ||
230 | static void (* r4k_blast_icache_page)(unsigned long addr); | |
231 | ||
078a55fc | 232 | static void r4k_blast_icache_page_setup(void) |
1da177e4 LT |
233 | { |
234 | unsigned long ic_lsize = cpu_icache_line_size(); | |
235 | ||
73f40352 CD |
236 | if (ic_lsize == 0) |
237 | r4k_blast_icache_page = (void *)cache_noop; | |
238 | else if (ic_lsize == 16) | |
1da177e4 LT |
239 | r4k_blast_icache_page = blast_icache16_page; |
240 | else if (ic_lsize == 32) | |
241 | r4k_blast_icache_page = blast_icache32_page; | |
242 | else if (ic_lsize == 64) | |
243 | r4k_blast_icache_page = blast_icache64_page; | |
244 | } | |
245 | ||
246 | ||
247 | static void (* r4k_blast_icache_page_indexed)(unsigned long addr); | |
248 | ||
078a55fc | 249 | static void r4k_blast_icache_page_indexed_setup(void) |
1da177e4 LT |
250 | { |
251 | unsigned long ic_lsize = cpu_icache_line_size(); | |
252 | ||
73f40352 CD |
253 | if (ic_lsize == 0) |
254 | r4k_blast_icache_page_indexed = (void *)cache_noop; | |
255 | else if (ic_lsize == 16) | |
1da177e4 LT |
256 | r4k_blast_icache_page_indexed = blast_icache16_page_indexed; |
257 | else if (ic_lsize == 32) { | |
02fe2c9c | 258 | if (R4600_V1_INDEX_ICACHEOP_WAR && cpu_is_r4600_v1_x()) |
1da177e4 LT |
259 | r4k_blast_icache_page_indexed = |
260 | blast_icache32_r4600_v1_page_indexed; | |
02fe2c9c TS |
261 | else if (TX49XX_ICACHE_INDEX_INV_WAR) |
262 | r4k_blast_icache_page_indexed = | |
263 | tx49_blast_icache32_page_indexed; | |
1da177e4 LT |
264 | else |
265 | r4k_blast_icache_page_indexed = | |
266 | blast_icache32_page_indexed; | |
267 | } else if (ic_lsize == 64) | |
268 | r4k_blast_icache_page_indexed = blast_icache64_page_indexed; | |
269 | } | |
270 | ||
f2e3656d SL |
271 | void (* r4k_blast_icache)(void); |
272 | EXPORT_SYMBOL(r4k_blast_icache); | |
1da177e4 | 273 | |
078a55fc | 274 | static void r4k_blast_icache_setup(void) |
1da177e4 LT |
275 | { |
276 | unsigned long ic_lsize = cpu_icache_line_size(); | |
277 | ||
73f40352 CD |
278 | if (ic_lsize == 0) |
279 | r4k_blast_icache = (void *)cache_noop; | |
280 | else if (ic_lsize == 16) | |
1da177e4 LT |
281 | r4k_blast_icache = blast_icache16; |
282 | else if (ic_lsize == 32) { | |
283 | if (R4600_V1_INDEX_ICACHEOP_WAR && cpu_is_r4600_v1_x()) | |
284 | r4k_blast_icache = blast_r4600_v1_icache32; | |
285 | else if (TX49XX_ICACHE_INDEX_INV_WAR) | |
286 | r4k_blast_icache = tx49_blast_icache32; | |
287 | else | |
288 | r4k_blast_icache = blast_icache32; | |
289 | } else if (ic_lsize == 64) | |
290 | r4k_blast_icache = blast_icache64; | |
291 | } | |
292 | ||
293 | static void (* r4k_blast_scache_page)(unsigned long addr); | |
294 | ||
078a55fc | 295 | static void r4k_blast_scache_page_setup(void) |
1da177e4 LT |
296 | { |
297 | unsigned long sc_lsize = cpu_scache_line_size(); | |
298 | ||
4debe4f9 | 299 | if (scache_size == 0) |
73f40352 | 300 | r4k_blast_scache_page = (void *)cache_noop; |
4debe4f9 | 301 | else if (sc_lsize == 16) |
1da177e4 LT |
302 | r4k_blast_scache_page = blast_scache16_page; |
303 | else if (sc_lsize == 32) | |
304 | r4k_blast_scache_page = blast_scache32_page; | |
305 | else if (sc_lsize == 64) | |
306 | r4k_blast_scache_page = blast_scache64_page; | |
307 | else if (sc_lsize == 128) | |
308 | r4k_blast_scache_page = blast_scache128_page; | |
309 | } | |
310 | ||
311 | static void (* r4k_blast_scache_page_indexed)(unsigned long addr); | |
312 | ||
078a55fc | 313 | static void r4k_blast_scache_page_indexed_setup(void) |
1da177e4 LT |
314 | { |
315 | unsigned long sc_lsize = cpu_scache_line_size(); | |
316 | ||
4debe4f9 | 317 | if (scache_size == 0) |
73f40352 | 318 | r4k_blast_scache_page_indexed = (void *)cache_noop; |
4debe4f9 | 319 | else if (sc_lsize == 16) |
1da177e4 LT |
320 | r4k_blast_scache_page_indexed = blast_scache16_page_indexed; |
321 | else if (sc_lsize == 32) | |
322 | r4k_blast_scache_page_indexed = blast_scache32_page_indexed; | |
323 | else if (sc_lsize == 64) | |
324 | r4k_blast_scache_page_indexed = blast_scache64_page_indexed; | |
325 | else if (sc_lsize == 128) | |
326 | r4k_blast_scache_page_indexed = blast_scache128_page_indexed; | |
327 | } | |
328 | ||
329 | static void (* r4k_blast_scache)(void); | |
330 | ||
078a55fc | 331 | static void r4k_blast_scache_setup(void) |
1da177e4 LT |
332 | { |
333 | unsigned long sc_lsize = cpu_scache_line_size(); | |
334 | ||
4debe4f9 | 335 | if (scache_size == 0) |
73f40352 | 336 | r4k_blast_scache = (void *)cache_noop; |
4debe4f9 | 337 | else if (sc_lsize == 16) |
1da177e4 LT |
338 | r4k_blast_scache = blast_scache16; |
339 | else if (sc_lsize == 32) | |
340 | r4k_blast_scache = blast_scache32; | |
341 | else if (sc_lsize == 64) | |
342 | r4k_blast_scache = blast_scache64; | |
343 | else if (sc_lsize == 128) | |
344 | r4k_blast_scache = blast_scache128; | |
345 | } | |
346 | ||
1da177e4 LT |
347 | static inline void local_r4k___flush_cache_all(void * args) |
348 | { | |
10cc3529 | 349 | switch (current_cpu_type()) { |
14bd8c08 | 350 | case CPU_LOONGSON2: |
1da177e4 LT |
351 | case CPU_R4000SC: |
352 | case CPU_R4000MC: | |
353 | case CPU_R4400SC: | |
354 | case CPU_R4400MC: | |
355 | case CPU_R10000: | |
356 | case CPU_R12000: | |
44d921b2 | 357 | case CPU_R14000: |
14bd8c08 RB |
358 | /* |
359 | * These caches are inclusive caches, that is, if something | |
360 | * is not cached in the S-cache, we know it also won't be | |
361 | * in one of the primary caches. | |
362 | */ | |
1da177e4 | 363 | r4k_blast_scache(); |
14bd8c08 RB |
364 | break; |
365 | ||
366 | default: | |
367 | r4k_blast_dcache(); | |
368 | r4k_blast_icache(); | |
369 | break; | |
1da177e4 LT |
370 | } |
371 | } | |
372 | ||
373 | static void r4k___flush_cache_all(void) | |
374 | { | |
48a26e60 | 375 | r4k_on_each_cpu(local_r4k___flush_cache_all, NULL); |
1da177e4 LT |
376 | } |
377 | ||
a76ab5c1 RB |
378 | static inline int has_valid_asid(const struct mm_struct *mm) |
379 | { | |
380 | #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) | |
381 | int i; | |
382 | ||
383 | for_each_online_cpu(i) | |
384 | if (cpu_context(i, mm)) | |
385 | return 1; | |
386 | ||
387 | return 0; | |
388 | #else | |
389 | return cpu_context(smp_processor_id(), mm); | |
390 | #endif | |
391 | } | |
392 | ||
9c5a3d72 RB |
393 | static void r4k__flush_cache_vmap(void) |
394 | { | |
395 | r4k_blast_dcache(); | |
396 | } | |
397 | ||
398 | static void r4k__flush_cache_vunmap(void) | |
399 | { | |
400 | r4k_blast_dcache(); | |
401 | } | |
402 | ||
1da177e4 LT |
403 | static inline void local_r4k_flush_cache_range(void * args) |
404 | { | |
405 | struct vm_area_struct *vma = args; | |
2eaa7ec2 | 406 | int exec = vma->vm_flags & VM_EXEC; |
1da177e4 | 407 | |
a76ab5c1 | 408 | if (!(has_valid_asid(vma->vm_mm))) |
1da177e4 LT |
409 | return; |
410 | ||
0550d9d1 | 411 | r4k_blast_dcache(); |
2eaa7ec2 RB |
412 | if (exec) |
413 | r4k_blast_icache(); | |
1da177e4 LT |
414 | } |
415 | ||
416 | static void r4k_flush_cache_range(struct vm_area_struct *vma, | |
417 | unsigned long start, unsigned long end) | |
418 | { | |
2eaa7ec2 | 419 | int exec = vma->vm_flags & VM_EXEC; |
0550d9d1 | 420 | |
2eaa7ec2 | 421 | if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc)) |
48a26e60 | 422 | r4k_on_each_cpu(local_r4k_flush_cache_range, vma); |
1da177e4 LT |
423 | } |
424 | ||
425 | static inline void local_r4k_flush_cache_mm(void * args) | |
426 | { | |
427 | struct mm_struct *mm = args; | |
428 | ||
a76ab5c1 | 429 | if (!has_valid_asid(mm)) |
1da177e4 LT |
430 | return; |
431 | ||
1da177e4 LT |
432 | /* |
433 | * Kludge alert. For obscure reasons R4000SC and R4400SC go nuts if we | |
434 | * only flush the primary caches but R10000 and R12000 behave sane ... | |
617667ba RB |
435 | * R4000SC and R4400SC indexed S-cache ops also invalidate primary |
436 | * caches, so we can bail out early. | |
1da177e4 | 437 | */ |
10cc3529 RB |
438 | if (current_cpu_type() == CPU_R4000SC || |
439 | current_cpu_type() == CPU_R4000MC || | |
440 | current_cpu_type() == CPU_R4400SC || | |
441 | current_cpu_type() == CPU_R4400MC) { | |
1da177e4 | 442 | r4k_blast_scache(); |
617667ba RB |
443 | return; |
444 | } | |
445 | ||
446 | r4k_blast_dcache(); | |
1da177e4 LT |
447 | } |
448 | ||
449 | static void r4k_flush_cache_mm(struct mm_struct *mm) | |
450 | { | |
451 | if (!cpu_has_dc_aliases) | |
452 | return; | |
453 | ||
48a26e60 | 454 | r4k_on_each_cpu(local_r4k_flush_cache_mm, mm); |
1da177e4 LT |
455 | } |
456 | ||
457 | struct flush_cache_page_args { | |
458 | struct vm_area_struct *vma; | |
6ec25809 | 459 | unsigned long addr; |
de62893b | 460 | unsigned long pfn; |
1da177e4 LT |
461 | }; |
462 | ||
463 | static inline void local_r4k_flush_cache_page(void *args) | |
464 | { | |
465 | struct flush_cache_page_args *fcp_args = args; | |
466 | struct vm_area_struct *vma = fcp_args->vma; | |
6ec25809 | 467 | unsigned long addr = fcp_args->addr; |
db813fe5 | 468 | struct page *page = pfn_to_page(fcp_args->pfn); |
1da177e4 LT |
469 | int exec = vma->vm_flags & VM_EXEC; |
470 | struct mm_struct *mm = vma->vm_mm; | |
c9c5023d | 471 | int map_coherent = 0; |
1da177e4 | 472 | pgd_t *pgdp; |
c6e8b587 | 473 | pud_t *pudp; |
1da177e4 LT |
474 | pmd_t *pmdp; |
475 | pte_t *ptep; | |
db813fe5 | 476 | void *vaddr; |
1da177e4 | 477 | |
79acf83e RB |
478 | /* |
479 | * If ownes no valid ASID yet, cannot possibly have gotten | |
480 | * this page into the cache. | |
481 | */ | |
a76ab5c1 | 482 | if (!has_valid_asid(mm)) |
79acf83e RB |
483 | return; |
484 | ||
6ec25809 RB |
485 | addr &= PAGE_MASK; |
486 | pgdp = pgd_offset(mm, addr); | |
487 | pudp = pud_offset(pgdp, addr); | |
488 | pmdp = pmd_offset(pudp, addr); | |
489 | ptep = pte_offset(pmdp, addr); | |
1da177e4 LT |
490 | |
491 | /* | |
492 | * If the page isn't marked valid, the page cannot possibly be | |
493 | * in the cache. | |
494 | */ | |
526af35e | 495 | if (!(pte_present(*ptep))) |
1da177e4 LT |
496 | return; |
497 | ||
db813fe5 RB |
498 | if ((mm == current->active_mm) && (pte_val(*ptep) & _PAGE_VALID)) |
499 | vaddr = NULL; | |
500 | else { | |
501 | /* | |
502 | * Use kmap_coherent or kmap_atomic to do flushes for | |
503 | * another ASID than the current one. | |
504 | */ | |
c9c5023d RB |
505 | map_coherent = (cpu_has_dc_aliases && |
506 | page_mapped(page) && !Page_dcache_dirty(page)); | |
507 | if (map_coherent) | |
db813fe5 RB |
508 | vaddr = kmap_coherent(page, addr); |
509 | else | |
9c02048f | 510 | vaddr = kmap_atomic(page); |
db813fe5 | 511 | addr = (unsigned long)vaddr; |
1da177e4 LT |
512 | } |
513 | ||
1da177e4 | 514 | if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc)) { |
db813fe5 | 515 | r4k_blast_dcache_page(addr); |
39b8d525 RB |
516 | if (exec && !cpu_icache_snoops_remote_store) |
517 | r4k_blast_scache_page(addr); | |
1da177e4 LT |
518 | } |
519 | if (exec) { | |
db813fe5 | 520 | if (vaddr && cpu_has_vtag_icache && mm == current->active_mm) { |
1da177e4 LT |
521 | int cpu = smp_processor_id(); |
522 | ||
26a51b27 TS |
523 | if (cpu_context(cpu, mm) != 0) |
524 | drop_mmu_context(mm, cpu); | |
1da177e4 | 525 | } else |
db813fe5 RB |
526 | r4k_blast_icache_page(addr); |
527 | } | |
528 | ||
529 | if (vaddr) { | |
c9c5023d | 530 | if (map_coherent) |
db813fe5 RB |
531 | kunmap_coherent(); |
532 | else | |
9c02048f | 533 | kunmap_atomic(vaddr); |
1da177e4 LT |
534 | } |
535 | } | |
536 | ||
6ec25809 RB |
537 | static void r4k_flush_cache_page(struct vm_area_struct *vma, |
538 | unsigned long addr, unsigned long pfn) | |
1da177e4 LT |
539 | { |
540 | struct flush_cache_page_args args; | |
541 | ||
1da177e4 | 542 | args.vma = vma; |
6ec25809 | 543 | args.addr = addr; |
de62893b | 544 | args.pfn = pfn; |
1da177e4 | 545 | |
48a26e60 | 546 | r4k_on_each_cpu(local_r4k_flush_cache_page, &args); |
1da177e4 LT |
547 | } |
548 | ||
549 | static inline void local_r4k_flush_data_cache_page(void * addr) | |
550 | { | |
551 | r4k_blast_dcache_page((unsigned long) addr); | |
552 | } | |
553 | ||
554 | static void r4k_flush_data_cache_page(unsigned long addr) | |
555 | { | |
a754f708 RB |
556 | if (in_atomic()) |
557 | local_r4k_flush_data_cache_page((void *)addr); | |
558 | else | |
48a26e60 | 559 | r4k_on_each_cpu(local_r4k_flush_data_cache_page, (void *) addr); |
1da177e4 LT |
560 | } |
561 | ||
562 | struct flush_icache_range_args { | |
d4264f18 AN |
563 | unsigned long start; |
564 | unsigned long end; | |
1da177e4 LT |
565 | }; |
566 | ||
e0cee3ee | 567 | static inline void local_r4k_flush_icache_range(unsigned long start, unsigned long end) |
1da177e4 | 568 | { |
1da177e4 | 569 | if (!cpu_has_ic_fills_f_dc) { |
73f40352 | 570 | if (end - start >= dcache_size) { |
1da177e4 LT |
571 | r4k_blast_dcache(); |
572 | } else { | |
10a3dabd | 573 | R4600_HIT_CACHEOP_WAR_IMPL; |
41700e73 | 574 | protected_blast_dcache_range(start, end); |
1da177e4 | 575 | } |
1da177e4 LT |
576 | } |
577 | ||
578 | if (end - start > icache_size) | |
579 | r4k_blast_icache(); | |
14bd8c08 RB |
580 | else { |
581 | switch (boot_cpu_type()) { | |
582 | case CPU_LOONGSON2: | |
bad009fe | 583 | protected_loongson2_blast_icache_range(start, end); |
14bd8c08 RB |
584 | break; |
585 | ||
586 | default: | |
bad009fe | 587 | protected_blast_icache_range(start, end); |
14bd8c08 RB |
588 | break; |
589 | } | |
590 | } | |
1da177e4 LT |
591 | } |
592 | ||
e0cee3ee TB |
593 | static inline void local_r4k_flush_icache_range_ipi(void *args) |
594 | { | |
595 | struct flush_icache_range_args *fir_args = args; | |
596 | unsigned long start = fir_args->start; | |
597 | unsigned long end = fir_args->end; | |
598 | ||
599 | local_r4k_flush_icache_range(start, end); | |
600 | } | |
601 | ||
d4264f18 | 602 | static void r4k_flush_icache_range(unsigned long start, unsigned long end) |
1da177e4 LT |
603 | { |
604 | struct flush_icache_range_args args; | |
605 | ||
606 | args.start = start; | |
607 | args.end = end; | |
608 | ||
48a26e60 | 609 | r4k_on_each_cpu(local_r4k_flush_icache_range_ipi, &args); |
cc61c1fe | 610 | instruction_hazard(); |
1da177e4 LT |
611 | } |
612 | ||
1da177e4 LT |
613 | #ifdef CONFIG_DMA_NONCOHERENT |
614 | ||
615 | static void r4k_dma_cache_wback_inv(unsigned long addr, unsigned long size) | |
616 | { | |
1da177e4 LT |
617 | /* Catch bad driver code */ |
618 | BUG_ON(size == 0); | |
619 | ||
ff522058 | 620 | preempt_disable(); |
fc5d2d27 | 621 | if (cpu_has_inclusive_pcaches) { |
41700e73 | 622 | if (size >= scache_size) |
1da177e4 | 623 | r4k_blast_scache(); |
41700e73 AN |
624 | else |
625 | blast_scache_range(addr, addr + size); | |
5596b0b2 | 626 | preempt_enable(); |
d0023c4a | 627 | __sync(); |
1da177e4 LT |
628 | return; |
629 | } | |
630 | ||
631 | /* | |
632 | * Either no secondary cache or the available caches don't have the | |
633 | * subset property so we have to flush the primary caches | |
634 | * explicitly | |
635 | */ | |
39b8d525 | 636 | if (cpu_has_safe_index_cacheops && size >= dcache_size) { |
1da177e4 LT |
637 | r4k_blast_dcache(); |
638 | } else { | |
1da177e4 | 639 | R4600_HIT_CACHEOP_WAR_IMPL; |
41700e73 | 640 | blast_dcache_range(addr, addr + size); |
1da177e4 | 641 | } |
ff522058 | 642 | preempt_enable(); |
1da177e4 LT |
643 | |
644 | bc_wback_inv(addr, size); | |
d0023c4a | 645 | __sync(); |
1da177e4 LT |
646 | } |
647 | ||
648 | static void r4k_dma_cache_inv(unsigned long addr, unsigned long size) | |
649 | { | |
1da177e4 LT |
650 | /* Catch bad driver code */ |
651 | BUG_ON(size == 0); | |
652 | ||
ff522058 | 653 | preempt_disable(); |
fc5d2d27 | 654 | if (cpu_has_inclusive_pcaches) { |
41700e73 | 655 | if (size >= scache_size) |
1da177e4 | 656 | r4k_blast_scache(); |
a8ca8b64 | 657 | else { |
a8ca8b64 RB |
658 | /* |
659 | * There is no clearly documented alignment requirement | |
660 | * for the cache instruction on MIPS processors and | |
661 | * some processors, among them the RM5200 and RM7000 | |
662 | * QED processors will throw an address error for cache | |
70342287 | 663 | * hit ops with insufficient alignment. Solved by |
a8ca8b64 RB |
664 | * aligning the address to cache line size. |
665 | */ | |
e9c33572 | 666 | blast_inv_scache_range(addr, addr + size); |
a8ca8b64 | 667 | } |
5596b0b2 | 668 | preempt_enable(); |
d0023c4a | 669 | __sync(); |
1da177e4 LT |
670 | return; |
671 | } | |
672 | ||
39b8d525 | 673 | if (cpu_has_safe_index_cacheops && size >= dcache_size) { |
1da177e4 LT |
674 | r4k_blast_dcache(); |
675 | } else { | |
1da177e4 | 676 | R4600_HIT_CACHEOP_WAR_IMPL; |
e9c33572 | 677 | blast_inv_dcache_range(addr, addr + size); |
1da177e4 | 678 | } |
ff522058 | 679 | preempt_enable(); |
1da177e4 LT |
680 | |
681 | bc_inv(addr, size); | |
d0023c4a | 682 | __sync(); |
1da177e4 LT |
683 | } |
684 | #endif /* CONFIG_DMA_NONCOHERENT */ | |
685 | ||
686 | /* | |
687 | * While we're protected against bad userland addresses we don't care | |
688 | * very much about what happens in that case. Usually a segmentation | |
689 | * fault will dump the process later on anyway ... | |
690 | */ | |
691 | static void local_r4k_flush_cache_sigtramp(void * arg) | |
692 | { | |
02fe2c9c TS |
693 | unsigned long ic_lsize = cpu_icache_line_size(); |
694 | unsigned long dc_lsize = cpu_dcache_line_size(); | |
695 | unsigned long sc_lsize = cpu_scache_line_size(); | |
1da177e4 LT |
696 | unsigned long addr = (unsigned long) arg; |
697 | ||
698 | R4600_HIT_CACHEOP_WAR_IMPL; | |
73f40352 CD |
699 | if (dc_lsize) |
700 | protected_writeback_dcache_line(addr & ~(dc_lsize - 1)); | |
4debe4f9 | 701 | if (!cpu_icache_snoops_remote_store && scache_size) |
1da177e4 | 702 | protected_writeback_scache_line(addr & ~(sc_lsize - 1)); |
73f40352 CD |
703 | if (ic_lsize) |
704 | protected_flush_icache_line(addr & ~(ic_lsize - 1)); | |
1da177e4 LT |
705 | if (MIPS4K_ICACHE_REFILL_WAR) { |
706 | __asm__ __volatile__ ( | |
707 | ".set push\n\t" | |
708 | ".set noat\n\t" | |
709 | ".set mips3\n\t" | |
875d43e7 | 710 | #ifdef CONFIG_32BIT |
1da177e4 LT |
711 | "la $at,1f\n\t" |
712 | #endif | |
875d43e7 | 713 | #ifdef CONFIG_64BIT |
1da177e4 LT |
714 | "dla $at,1f\n\t" |
715 | #endif | |
716 | "cache %0,($at)\n\t" | |
717 | "nop; nop; nop\n" | |
718 | "1:\n\t" | |
719 | ".set pop" | |
720 | : | |
721 | : "i" (Hit_Invalidate_I)); | |
722 | } | |
723 | if (MIPS_CACHE_SYNC_WAR) | |
724 | __asm__ __volatile__ ("sync"); | |
725 | } | |
726 | ||
727 | static void r4k_flush_cache_sigtramp(unsigned long addr) | |
728 | { | |
48a26e60 | 729 | r4k_on_each_cpu(local_r4k_flush_cache_sigtramp, (void *) addr); |
1da177e4 LT |
730 | } |
731 | ||
732 | static void r4k_flush_icache_all(void) | |
733 | { | |
734 | if (cpu_has_vtag_icache) | |
735 | r4k_blast_icache(); | |
736 | } | |
737 | ||
d9cdc901 RB |
738 | struct flush_kernel_vmap_range_args { |
739 | unsigned long vaddr; | |
740 | int size; | |
741 | }; | |
742 | ||
743 | static inline void local_r4k_flush_kernel_vmap_range(void *args) | |
744 | { | |
745 | struct flush_kernel_vmap_range_args *vmra = args; | |
746 | unsigned long vaddr = vmra->vaddr; | |
747 | int size = vmra->size; | |
748 | ||
749 | /* | |
750 | * Aliases only affect the primary caches so don't bother with | |
751 | * S-caches or T-caches. | |
752 | */ | |
753 | if (cpu_has_safe_index_cacheops && size >= dcache_size) | |
754 | r4k_blast_dcache(); | |
755 | else { | |
756 | R4600_HIT_CACHEOP_WAR_IMPL; | |
757 | blast_dcache_range(vaddr, vaddr + size); | |
758 | } | |
759 | } | |
760 | ||
761 | static void r4k_flush_kernel_vmap_range(unsigned long vaddr, int size) | |
762 | { | |
763 | struct flush_kernel_vmap_range_args args; | |
764 | ||
765 | args.vaddr = (unsigned long) vaddr; | |
766 | args.size = size; | |
767 | ||
768 | r4k_on_each_cpu(local_r4k_flush_kernel_vmap_range, &args); | |
769 | } | |
770 | ||
1da177e4 LT |
771 | static inline void rm7k_erratum31(void) |
772 | { | |
773 | const unsigned long ic_lsize = 32; | |
774 | unsigned long addr; | |
775 | ||
776 | /* RM7000 erratum #31. The icache is screwed at startup. */ | |
777 | write_c0_taglo(0); | |
778 | write_c0_taghi(0); | |
779 | ||
780 | for (addr = INDEX_BASE; addr <= INDEX_BASE + 4096; addr += ic_lsize) { | |
781 | __asm__ __volatile__ ( | |
d8748a3a | 782 | ".set push\n\t" |
1da177e4 LT |
783 | ".set noreorder\n\t" |
784 | ".set mips3\n\t" | |
785 | "cache\t%1, 0(%0)\n\t" | |
786 | "cache\t%1, 0x1000(%0)\n\t" | |
787 | "cache\t%1, 0x2000(%0)\n\t" | |
788 | "cache\t%1, 0x3000(%0)\n\t" | |
789 | "cache\t%2, 0(%0)\n\t" | |
790 | "cache\t%2, 0x1000(%0)\n\t" | |
791 | "cache\t%2, 0x2000(%0)\n\t" | |
792 | "cache\t%2, 0x3000(%0)\n\t" | |
793 | "cache\t%1, 0(%0)\n\t" | |
794 | "cache\t%1, 0x1000(%0)\n\t" | |
795 | "cache\t%1, 0x2000(%0)\n\t" | |
796 | "cache\t%1, 0x3000(%0)\n\t" | |
d8748a3a | 797 | ".set pop\n" |
1da177e4 LT |
798 | : |
799 | : "r" (addr), "i" (Index_Store_Tag_I), "i" (Fill)); | |
800 | } | |
801 | } | |
802 | ||
006a851b SH |
803 | static inline void alias_74k_erratum(struct cpuinfo_mips *c) |
804 | { | |
9213ad77 MR |
805 | unsigned int imp = c->processor_id & PRID_IMP_MASK; |
806 | unsigned int rev = c->processor_id & PRID_REV_MASK; | |
807 | ||
006a851b SH |
808 | /* |
809 | * Early versions of the 74K do not update the cache tags on a | |
810 | * vtag miss/ptag hit which can occur in the case of KSEG0/KUSEG | |
811 | * aliases. In this case it is better to treat the cache as always | |
812 | * having aliases. | |
813 | */ | |
9213ad77 MR |
814 | switch (imp) { |
815 | case PRID_IMP_74K: | |
816 | if (rev <= PRID_REV_ENCODE_332(2, 4, 0)) | |
817 | c->dcache.flags |= MIPS_CACHE_VTAG; | |
818 | if (rev == PRID_REV_ENCODE_332(2, 4, 0)) | |
819 | write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND); | |
820 | break; | |
821 | case PRID_IMP_1074K: | |
822 | if (rev <= PRID_REV_ENCODE_332(1, 1, 0)) { | |
823 | c->dcache.flags |= MIPS_CACHE_VTAG; | |
824 | write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND); | |
825 | } | |
826 | break; | |
827 | default: | |
828 | BUG(); | |
006a851b SH |
829 | } |
830 | } | |
831 | ||
078a55fc | 832 | static char *way_string[] = { NULL, "direct mapped", "2-way", |
1da177e4 LT |
833 | "3-way", "4-way", "5-way", "6-way", "7-way", "8-way" |
834 | }; | |
835 | ||
078a55fc | 836 | static void probe_pcache(void) |
1da177e4 LT |
837 | { |
838 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
839 | unsigned int config = read_c0_config(); | |
840 | unsigned int prid = read_c0_prid(); | |
841 | unsigned long config1; | |
842 | unsigned int lsize; | |
843 | ||
69f24d17 | 844 | switch (current_cpu_type()) { |
1da177e4 LT |
845 | case CPU_R4600: /* QED style two way caches? */ |
846 | case CPU_R4700: | |
847 | case CPU_R5000: | |
848 | case CPU_NEVADA: | |
849 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
850 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
851 | c->icache.ways = 2; | |
3c68da79 | 852 | c->icache.waybit = __ffs(icache_size/2); |
1da177e4 LT |
853 | |
854 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
855 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
856 | c->dcache.ways = 2; | |
3c68da79 | 857 | c->dcache.waybit= __ffs(dcache_size/2); |
1da177e4 LT |
858 | |
859 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
860 | break; | |
861 | ||
862 | case CPU_R5432: | |
863 | case CPU_R5500: | |
864 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
865 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
866 | c->icache.ways = 2; | |
867 | c->icache.waybit= 0; | |
868 | ||
869 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
870 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
871 | c->dcache.ways = 2; | |
872 | c->dcache.waybit = 0; | |
873 | ||
5864810b | 874 | c->options |= MIPS_CPU_CACHE_CDEX_P | MIPS_CPU_PREFETCH; |
1da177e4 LT |
875 | break; |
876 | ||
877 | case CPU_TX49XX: | |
878 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
879 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
880 | c->icache.ways = 4; | |
881 | c->icache.waybit= 0; | |
882 | ||
883 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
884 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
885 | c->dcache.ways = 4; | |
886 | c->dcache.waybit = 0; | |
887 | ||
888 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
de862b48 | 889 | c->options |= MIPS_CPU_PREFETCH; |
1da177e4 LT |
890 | break; |
891 | ||
892 | case CPU_R4000PC: | |
893 | case CPU_R4000SC: | |
894 | case CPU_R4000MC: | |
895 | case CPU_R4400PC: | |
896 | case CPU_R4400SC: | |
897 | case CPU_R4400MC: | |
898 | case CPU_R4300: | |
899 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
900 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
901 | c->icache.ways = 1; | |
70342287 | 902 | c->icache.waybit = 0; /* doesn't matter */ |
1da177e4 LT |
903 | |
904 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
905 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
906 | c->dcache.ways = 1; | |
907 | c->dcache.waybit = 0; /* does not matter */ | |
908 | ||
909 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
910 | break; | |
911 | ||
912 | case CPU_R10000: | |
913 | case CPU_R12000: | |
44d921b2 | 914 | case CPU_R14000: |
1da177e4 LT |
915 | icache_size = 1 << (12 + ((config & R10K_CONF_IC) >> 29)); |
916 | c->icache.linesz = 64; | |
917 | c->icache.ways = 2; | |
918 | c->icache.waybit = 0; | |
919 | ||
920 | dcache_size = 1 << (12 + ((config & R10K_CONF_DC) >> 26)); | |
921 | c->dcache.linesz = 32; | |
922 | c->dcache.ways = 2; | |
923 | c->dcache.waybit = 0; | |
924 | ||
925 | c->options |= MIPS_CPU_PREFETCH; | |
926 | break; | |
927 | ||
928 | case CPU_VR4133: | |
2874fe55 | 929 | write_c0_config(config & ~VR41_CONF_P4K); |
1da177e4 LT |
930 | case CPU_VR4131: |
931 | /* Workaround for cache instruction bug of VR4131 */ | |
932 | if (c->processor_id == 0x0c80U || c->processor_id == 0x0c81U || | |
933 | c->processor_id == 0x0c82U) { | |
4e8ab361 YY |
934 | config |= 0x00400000U; |
935 | if (c->processor_id == 0x0c80U) | |
936 | config |= VR41_CONF_BP; | |
1da177e4 | 937 | write_c0_config(config); |
1058ecda YY |
938 | } else |
939 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
940 | ||
1da177e4 LT |
941 | icache_size = 1 << (10 + ((config & CONF_IC) >> 9)); |
942 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
943 | c->icache.ways = 2; | |
3c68da79 | 944 | c->icache.waybit = __ffs(icache_size/2); |
1da177e4 LT |
945 | |
946 | dcache_size = 1 << (10 + ((config & CONF_DC) >> 6)); | |
947 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
948 | c->dcache.ways = 2; | |
3c68da79 | 949 | c->dcache.waybit = __ffs(dcache_size/2); |
1da177e4 LT |
950 | break; |
951 | ||
952 | case CPU_VR41XX: | |
953 | case CPU_VR4111: | |
954 | case CPU_VR4121: | |
955 | case CPU_VR4122: | |
956 | case CPU_VR4181: | |
957 | case CPU_VR4181A: | |
958 | icache_size = 1 << (10 + ((config & CONF_IC) >> 9)); | |
959 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
960 | c->icache.ways = 1; | |
70342287 | 961 | c->icache.waybit = 0; /* doesn't matter */ |
1da177e4 LT |
962 | |
963 | dcache_size = 1 << (10 + ((config & CONF_DC) >> 6)); | |
964 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
965 | c->dcache.ways = 1; | |
966 | c->dcache.waybit = 0; /* does not matter */ | |
967 | ||
968 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
969 | break; | |
970 | ||
971 | case CPU_RM7000: | |
972 | rm7k_erratum31(); | |
973 | ||
1da177e4 LT |
974 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); |
975 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
976 | c->icache.ways = 4; | |
3c68da79 | 977 | c->icache.waybit = __ffs(icache_size / c->icache.ways); |
1da177e4 LT |
978 | |
979 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
980 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
981 | c->dcache.ways = 4; | |
3c68da79 | 982 | c->dcache.waybit = __ffs(dcache_size / c->dcache.ways); |
1da177e4 | 983 | |
1da177e4 | 984 | c->options |= MIPS_CPU_CACHE_CDEX_P; |
1da177e4 LT |
985 | c->options |= MIPS_CPU_PREFETCH; |
986 | break; | |
987 | ||
2a21c730 FZ |
988 | case CPU_LOONGSON2: |
989 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
990 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
991 | if (prid & 0x3) | |
992 | c->icache.ways = 4; | |
993 | else | |
994 | c->icache.ways = 2; | |
995 | c->icache.waybit = 0; | |
996 | ||
997 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
998 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
999 | if (prid & 0x3) | |
1000 | c->dcache.ways = 4; | |
1001 | else | |
1002 | c->dcache.ways = 2; | |
1003 | c->dcache.waybit = 0; | |
1004 | break; | |
1005 | ||
1da177e4 LT |
1006 | default: |
1007 | if (!(config & MIPS_CONF_M)) | |
1008 | panic("Don't know how to probe P-caches on this cpu."); | |
1009 | ||
1010 | /* | |
1011 | * So we seem to be a MIPS32 or MIPS64 CPU | |
1012 | * So let's probe the I-cache ... | |
1013 | */ | |
1014 | config1 = read_c0_config1(); | |
1015 | ||
1016 | if ((lsize = ((config1 >> 19) & 7))) | |
1017 | c->icache.linesz = 2 << lsize; | |
1018 | else | |
1019 | c->icache.linesz = lsize; | |
dc34b05f | 1020 | c->icache.sets = 32 << (((config1 >> 22) + 1) & 7); |
1da177e4 LT |
1021 | c->icache.ways = 1 + ((config1 >> 16) & 7); |
1022 | ||
1023 | icache_size = c->icache.sets * | |
70342287 RB |
1024 | c->icache.ways * |
1025 | c->icache.linesz; | |
3c68da79 | 1026 | c->icache.waybit = __ffs(icache_size/c->icache.ways); |
1da177e4 LT |
1027 | |
1028 | if (config & 0x8) /* VI bit */ | |
1029 | c->icache.flags |= MIPS_CACHE_VTAG; | |
1030 | ||
1031 | /* | |
1032 | * Now probe the MIPS32 / MIPS64 data cache. | |
1033 | */ | |
1034 | c->dcache.flags = 0; | |
1035 | ||
1036 | if ((lsize = ((config1 >> 10) & 7))) | |
1037 | c->dcache.linesz = 2 << lsize; | |
1038 | else | |
1039 | c->dcache.linesz= lsize; | |
dc34b05f | 1040 | c->dcache.sets = 32 << (((config1 >> 13) + 1) & 7); |
1da177e4 LT |
1041 | c->dcache.ways = 1 + ((config1 >> 7) & 7); |
1042 | ||
1043 | dcache_size = c->dcache.sets * | |
70342287 RB |
1044 | c->dcache.ways * |
1045 | c->dcache.linesz; | |
3c68da79 | 1046 | c->dcache.waybit = __ffs(dcache_size/c->dcache.ways); |
1da177e4 LT |
1047 | |
1048 | c->options |= MIPS_CPU_PREFETCH; | |
1049 | break; | |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * Processor configuration sanity check for the R4000SC erratum | |
70342287 | 1054 | * #5. With page sizes larger than 32kB there is no possibility |
1da177e4 LT |
1055 | * to get a VCE exception anymore so we don't care about this |
1056 | * misconfiguration. The case is rather theoretical anyway; | |
1057 | * presumably no vendor is shipping his hardware in the "bad" | |
1058 | * configuration. | |
1059 | */ | |
8ff374b9 MR |
1060 | if ((prid & PRID_IMP_MASK) == PRID_IMP_R4000 && |
1061 | (prid & PRID_REV_MASK) < PRID_REV_R4400 && | |
1da177e4 LT |
1062 | !(config & CONF_SC) && c->icache.linesz != 16 && |
1063 | PAGE_SIZE <= 0x8000) | |
1064 | panic("Improper R4000SC processor configuration detected"); | |
1065 | ||
1066 | /* compute a couple of other cache variables */ | |
1067 | c->icache.waysize = icache_size / c->icache.ways; | |
1068 | c->dcache.waysize = dcache_size / c->dcache.ways; | |
1069 | ||
73f40352 CD |
1070 | c->icache.sets = c->icache.linesz ? |
1071 | icache_size / (c->icache.linesz * c->icache.ways) : 0; | |
1072 | c->dcache.sets = c->dcache.linesz ? | |
1073 | dcache_size / (c->dcache.linesz * c->dcache.ways) : 0; | |
1da177e4 LT |
1074 | |
1075 | /* | |
1076 | * R10000 and R12000 P-caches are odd in a positive way. They're 32kB | |
1077 | * 2-way virtually indexed so normally would suffer from aliases. So | |
1078 | * normally they'd suffer from aliases but magic in the hardware deals | |
1079 | * with that for us so we don't need to take care ourselves. | |
1080 | */ | |
69f24d17 | 1081 | switch (current_cpu_type()) { |
a95970f3 | 1082 | case CPU_20KC: |
505403b6 | 1083 | case CPU_25KF: |
641e97f3 RB |
1084 | case CPU_SB1: |
1085 | case CPU_SB1A: | |
efa0f81c | 1086 | case CPU_XLR: |
de62893b | 1087 | c->dcache.flags |= MIPS_CACHE_PINDEX; |
641e97f3 RB |
1088 | break; |
1089 | ||
d1e344e5 RB |
1090 | case CPU_R10000: |
1091 | case CPU_R12000: | |
44d921b2 | 1092 | case CPU_R14000: |
d1e344e5 | 1093 | break; |
641e97f3 | 1094 | |
113c62d9 | 1095 | case CPU_M14KC: |
f8fa4811 | 1096 | case CPU_M14KEC: |
d1e344e5 | 1097 | case CPU_24K: |
98a41de9 | 1098 | case CPU_34K: |
2e78ae3f | 1099 | case CPU_74K: |
39b8d525 | 1100 | case CPU_1004K: |
69f24d17 | 1101 | if (current_cpu_type() == CPU_74K) |
006a851b | 1102 | alias_74k_erratum(c); |
beab375a RB |
1103 | if ((read_c0_config7() & (1 << 16))) { |
1104 | /* effectively physically indexed dcache, | |
1105 | thus no virtual aliases. */ | |
1106 | c->dcache.flags |= MIPS_CACHE_PINDEX; | |
1107 | break; | |
1108 | } | |
d1e344e5 | 1109 | default: |
beab375a RB |
1110 | if (c->dcache.waysize > PAGE_SIZE) |
1111 | c->dcache.flags |= MIPS_CACHE_ALIASES; | |
d1e344e5 | 1112 | } |
1da177e4 | 1113 | |
69f24d17 | 1114 | switch (current_cpu_type()) { |
1da177e4 LT |
1115 | case CPU_20KC: |
1116 | /* | |
1117 | * Some older 20Kc chips doesn't have the 'VI' bit in | |
1118 | * the config register. | |
1119 | */ | |
1120 | c->icache.flags |= MIPS_CACHE_VTAG; | |
1121 | break; | |
1122 | ||
270717a8 | 1123 | case CPU_ALCHEMY: |
1da177e4 LT |
1124 | c->icache.flags |= MIPS_CACHE_IC_F_DC; |
1125 | break; | |
1da177e4 | 1126 | |
14bd8c08 RB |
1127 | case CPU_LOONGSON2: |
1128 | /* | |
1129 | * LOONGSON2 has 4 way icache, but when using indexed cache op, | |
1130 | * one op will act on all 4 ways | |
1131 | */ | |
1132 | c->icache.ways = 1; | |
1133 | } | |
2a21c730 | 1134 | |
1da177e4 LT |
1135 | printk("Primary instruction cache %ldkB, %s, %s, linesize %d bytes.\n", |
1136 | icache_size >> 10, | |
7fc7316a | 1137 | c->icache.flags & MIPS_CACHE_VTAG ? "VIVT" : "VIPT", |
1da177e4 LT |
1138 | way_string[c->icache.ways], c->icache.linesz); |
1139 | ||
64bfca5c RB |
1140 | printk("Primary data cache %ldkB, %s, %s, %s, linesize %d bytes\n", |
1141 | dcache_size >> 10, way_string[c->dcache.ways], | |
1142 | (c->dcache.flags & MIPS_CACHE_PINDEX) ? "PIPT" : "VIPT", | |
1143 | (c->dcache.flags & MIPS_CACHE_ALIASES) ? | |
1144 | "cache aliases" : "no aliases", | |
1145 | c->dcache.linesz); | |
1da177e4 LT |
1146 | } |
1147 | ||
1148 | /* | |
1149 | * If you even _breathe_ on this function, look at the gcc output and make sure | |
1150 | * it does not pop things on and off the stack for the cache sizing loop that | |
1151 | * executes in KSEG1 space or else you will crash and burn badly. You have | |
1152 | * been warned. | |
1153 | */ | |
078a55fc | 1154 | static int probe_scache(void) |
1da177e4 | 1155 | { |
1da177e4 LT |
1156 | unsigned long flags, addr, begin, end, pow2; |
1157 | unsigned int config = read_c0_config(); | |
1158 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1da177e4 LT |
1159 | |
1160 | if (config & CONF_SC) | |
1161 | return 0; | |
1162 | ||
e001e528 | 1163 | begin = (unsigned long) &_stext; |
1da177e4 LT |
1164 | begin &= ~((4 * 1024 * 1024) - 1); |
1165 | end = begin + (4 * 1024 * 1024); | |
1166 | ||
1167 | /* | |
1168 | * This is such a bitch, you'd think they would make it easy to do | |
1169 | * this. Away you daemons of stupidity! | |
1170 | */ | |
1171 | local_irq_save(flags); | |
1172 | ||
1173 | /* Fill each size-multiple cache line with a valid tag. */ | |
1174 | pow2 = (64 * 1024); | |
1175 | for (addr = begin; addr < end; addr = (begin + pow2)) { | |
1176 | unsigned long *p = (unsigned long *) addr; | |
1177 | __asm__ __volatile__("nop" : : "r" (*p)); /* whee... */ | |
1178 | pow2 <<= 1; | |
1179 | } | |
1180 | ||
1181 | /* Load first line with zero (therefore invalid) tag. */ | |
1182 | write_c0_taglo(0); | |
1183 | write_c0_taghi(0); | |
1184 | __asm__ __volatile__("nop; nop; nop; nop;"); /* avoid the hazard */ | |
1185 | cache_op(Index_Store_Tag_I, begin); | |
1186 | cache_op(Index_Store_Tag_D, begin); | |
1187 | cache_op(Index_Store_Tag_SD, begin); | |
1188 | ||
1189 | /* Now search for the wrap around point. */ | |
1190 | pow2 = (128 * 1024); | |
1da177e4 LT |
1191 | for (addr = begin + (128 * 1024); addr < end; addr = begin + pow2) { |
1192 | cache_op(Index_Load_Tag_SD, addr); | |
1193 | __asm__ __volatile__("nop; nop; nop; nop;"); /* hazard... */ | |
1194 | if (!read_c0_taglo()) | |
1195 | break; | |
1196 | pow2 <<= 1; | |
1197 | } | |
1198 | local_irq_restore(flags); | |
1199 | addr -= begin; | |
1200 | ||
1201 | scache_size = addr; | |
1202 | c->scache.linesz = 16 << ((config & R4K_CONF_SB) >> 22); | |
1203 | c->scache.ways = 1; | |
1204 | c->dcache.waybit = 0; /* does not matter */ | |
1205 | ||
1206 | return 1; | |
1207 | } | |
1208 | ||
2a21c730 FZ |
1209 | static void __init loongson2_sc_init(void) |
1210 | { | |
1211 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1212 | ||
1213 | scache_size = 512*1024; | |
1214 | c->scache.linesz = 32; | |
1215 | c->scache.ways = 4; | |
1216 | c->scache.waybit = 0; | |
1217 | c->scache.waysize = scache_size / (c->scache.ways); | |
1218 | c->scache.sets = scache_size / (c->scache.linesz * c->scache.ways); | |
1219 | pr_info("Unified secondary cache %ldkB %s, linesize %d bytes.\n", | |
1220 | scache_size >> 10, way_string[c->scache.ways], c->scache.linesz); | |
1221 | ||
1222 | c->options |= MIPS_CPU_INCLUSIVE_CACHES; | |
1223 | } | |
2a21c730 | 1224 | |
1da177e4 LT |
1225 | extern int r5k_sc_init(void); |
1226 | extern int rm7k_sc_init(void); | |
9318c51a | 1227 | extern int mips_sc_init(void); |
1da177e4 | 1228 | |
078a55fc | 1229 | static void setup_scache(void) |
1da177e4 LT |
1230 | { |
1231 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1232 | unsigned int config = read_c0_config(); | |
1da177e4 LT |
1233 | int sc_present = 0; |
1234 | ||
1235 | /* | |
1236 | * Do the probing thing on R4000SC and R4400SC processors. Other | |
1237 | * processors don't have a S-cache that would be relevant to the | |
603e82ed | 1238 | * Linux memory management. |
1da177e4 | 1239 | */ |
69f24d17 | 1240 | switch (current_cpu_type()) { |
1da177e4 LT |
1241 | case CPU_R4000SC: |
1242 | case CPU_R4000MC: | |
1243 | case CPU_R4400SC: | |
1244 | case CPU_R4400MC: | |
ba5187db | 1245 | sc_present = run_uncached(probe_scache); |
1da177e4 LT |
1246 | if (sc_present) |
1247 | c->options |= MIPS_CPU_CACHE_CDEX_S; | |
1248 | break; | |
1249 | ||
1250 | case CPU_R10000: | |
1251 | case CPU_R12000: | |
44d921b2 | 1252 | case CPU_R14000: |
1da177e4 LT |
1253 | scache_size = 0x80000 << ((config & R10K_CONF_SS) >> 16); |
1254 | c->scache.linesz = 64 << ((config >> 13) & 1); | |
1255 | c->scache.ways = 2; | |
1256 | c->scache.waybit= 0; | |
1257 | sc_present = 1; | |
1258 | break; | |
1259 | ||
1260 | case CPU_R5000: | |
1261 | case CPU_NEVADA: | |
1262 | #ifdef CONFIG_R5000_CPU_SCACHE | |
1263 | r5k_sc_init(); | |
1264 | #endif | |
70342287 | 1265 | return; |
1da177e4 LT |
1266 | |
1267 | case CPU_RM7000: | |
1da177e4 LT |
1268 | #ifdef CONFIG_RM7000_CPU_SCACHE |
1269 | rm7k_sc_init(); | |
1270 | #endif | |
1271 | return; | |
1272 | ||
2a21c730 FZ |
1273 | case CPU_LOONGSON2: |
1274 | loongson2_sc_init(); | |
1275 | return; | |
14bd8c08 | 1276 | |
a3d4fb2d J |
1277 | case CPU_XLP: |
1278 | /* don't need to worry about L2, fully coherent */ | |
1279 | return; | |
2a21c730 | 1280 | |
1da177e4 | 1281 | default: |
adb37892 DCZ |
1282 | if (c->isa_level & (MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M32R2 | |
1283 | MIPS_CPU_ISA_M64R1 | MIPS_CPU_ISA_M64R2)) { | |
9318c51a CD |
1284 | #ifdef CONFIG_MIPS_CPU_SCACHE |
1285 | if (mips_sc_init ()) { | |
1286 | scache_size = c->scache.ways * c->scache.sets * c->scache.linesz; | |
1287 | printk("MIPS secondary cache %ldkB, %s, linesize %d bytes.\n", | |
1288 | scache_size >> 10, | |
1289 | way_string[c->scache.ways], c->scache.linesz); | |
1290 | } | |
1291 | #else | |
1292 | if (!(c->scache.flags & MIPS_CACHE_NOT_PRESENT)) | |
1293 | panic("Dunno how to handle MIPS32 / MIPS64 second level cache"); | |
1294 | #endif | |
1295 | return; | |
1296 | } | |
1da177e4 LT |
1297 | sc_present = 0; |
1298 | } | |
1299 | ||
1300 | if (!sc_present) | |
1301 | return; | |
1302 | ||
1da177e4 LT |
1303 | /* compute a couple of other cache variables */ |
1304 | c->scache.waysize = scache_size / c->scache.ways; | |
1305 | ||
1306 | c->scache.sets = scache_size / (c->scache.linesz * c->scache.ways); | |
1307 | ||
1308 | printk("Unified secondary cache %ldkB %s, linesize %d bytes.\n", | |
1309 | scache_size >> 10, way_string[c->scache.ways], c->scache.linesz); | |
1310 | ||
fc5d2d27 | 1311 | c->options |= MIPS_CPU_INCLUSIVE_CACHES; |
1da177e4 LT |
1312 | } |
1313 | ||
9370b351 SS |
1314 | void au1x00_fixup_config_od(void) |
1315 | { | |
1316 | /* | |
1317 | * c0_config.od (bit 19) was write only (and read as 0) | |
1318 | * on the early revisions of Alchemy SOCs. It disables the bus | |
1319 | * transaction overlapping and needs to be set to fix various errata. | |
1320 | */ | |
1321 | switch (read_c0_prid()) { | |
1322 | case 0x00030100: /* Au1000 DA */ | |
1323 | case 0x00030201: /* Au1000 HA */ | |
1324 | case 0x00030202: /* Au1000 HB */ | |
1325 | case 0x01030200: /* Au1500 AB */ | |
1326 | /* | |
1327 | * Au1100 errata actually keeps silence about this bit, so we set it | |
1328 | * just in case for those revisions that require it to be set according | |
270717a8 | 1329 | * to the (now gone) cpu table. |
9370b351 SS |
1330 | */ |
1331 | case 0x02030200: /* Au1100 AB */ | |
1332 | case 0x02030201: /* Au1100 BA */ | |
1333 | case 0x02030202: /* Au1100 BC */ | |
1334 | set_c0_config(1 << 19); | |
1335 | break; | |
1336 | } | |
1337 | } | |
1338 | ||
89052bd7 RB |
1339 | /* CP0 hazard avoidance. */ |
1340 | #define NXP_BARRIER() \ | |
1341 | __asm__ __volatile__( \ | |
1342 | ".set noreorder\n\t" \ | |
1343 | "nop; nop; nop; nop; nop; nop;\n\t" \ | |
1344 | ".set reorder\n\t") | |
1345 | ||
1346 | static void nxp_pr4450_fixup_config(void) | |
1347 | { | |
1348 | unsigned long config0; | |
1349 | ||
1350 | config0 = read_c0_config(); | |
1351 | ||
1352 | /* clear all three cache coherency fields */ | |
1353 | config0 &= ~(0x7 | (7 << 25) | (7 << 28)); | |
1354 | config0 |= (((_page_cachable_default >> _CACHE_SHIFT) << 0) | | |
1355 | ((_page_cachable_default >> _CACHE_SHIFT) << 25) | | |
1356 | ((_page_cachable_default >> _CACHE_SHIFT) << 28)); | |
1357 | write_c0_config(config0); | |
1358 | NXP_BARRIER(); | |
1359 | } | |
1360 | ||
078a55fc | 1361 | static int cca = -1; |
35133692 CD |
1362 | |
1363 | static int __init cca_setup(char *str) | |
1364 | { | |
1365 | get_option(&str, &cca); | |
1366 | ||
b5b64f2b | 1367 | return 0; |
35133692 CD |
1368 | } |
1369 | ||
b5b64f2b | 1370 | early_param("cca", cca_setup); |
35133692 | 1371 | |
078a55fc | 1372 | static void coherency_setup(void) |
1da177e4 | 1373 | { |
35133692 CD |
1374 | if (cca < 0 || cca > 7) |
1375 | cca = read_c0_config() & CONF_CM_CMASK; | |
1376 | _page_cachable_default = cca << _CACHE_SHIFT; | |
1377 | ||
1378 | pr_debug("Using cache attribute %d\n", cca); | |
1379 | change_c0_config(CONF_CM_CMASK, cca); | |
1da177e4 LT |
1380 | |
1381 | /* | |
1382 | * c0_status.cu=0 specifies that updates by the sc instruction use | |
1383 | * the coherency mode specified by the TLB; 1 means cachable | |
1384 | * coherent update on write will be used. Not all processors have | |
1385 | * this bit and; some wire it to zero, others like Toshiba had the | |
1386 | * silly idea of putting something else there ... | |
1387 | */ | |
10cc3529 | 1388 | switch (current_cpu_type()) { |
1da177e4 LT |
1389 | case CPU_R4000PC: |
1390 | case CPU_R4000SC: | |
1391 | case CPU_R4000MC: | |
1392 | case CPU_R4400PC: | |
1393 | case CPU_R4400SC: | |
1394 | case CPU_R4400MC: | |
1395 | clear_c0_config(CONF_CU); | |
1396 | break; | |
9370b351 | 1397 | /* |
df586d59 | 1398 | * We need to catch the early Alchemy SOCs with |
270717a8 ML |
1399 | * the write-only co_config.od bit and set it back to one on: |
1400 | * Au1000 rev DA, HA, HB; Au1100 AB, BA, BC, Au1500 AB | |
9370b351 | 1401 | */ |
270717a8 | 1402 | case CPU_ALCHEMY: |
9370b351 SS |
1403 | au1x00_fixup_config_od(); |
1404 | break; | |
89052bd7 RB |
1405 | |
1406 | case PRID_IMP_PR4450: | |
1407 | nxp_pr4450_fixup_config(); | |
1408 | break; | |
1da177e4 LT |
1409 | } |
1410 | } | |
1411 | ||
078a55fc | 1412 | static void r4k_cache_error_setup(void) |
1da177e4 | 1413 | { |
641e97f3 RB |
1414 | extern char __weak except_vec2_generic; |
1415 | extern char __weak except_vec2_sb1; | |
1da177e4 | 1416 | |
69f24d17 | 1417 | switch (current_cpu_type()) { |
641e97f3 RB |
1418 | case CPU_SB1: |
1419 | case CPU_SB1A: | |
1420 | set_uncached_handler(0x100, &except_vec2_sb1, 0x80); | |
1421 | break; | |
1422 | ||
1423 | default: | |
1424 | set_uncached_handler(0x100, &except_vec2_generic, 0x80); | |
1425 | break; | |
1426 | } | |
9cd9669b DD |
1427 | } |
1428 | ||
078a55fc | 1429 | void r4k_cache_init(void) |
9cd9669b DD |
1430 | { |
1431 | extern void build_clear_page(void); | |
1432 | extern void build_copy_page(void); | |
1433 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1da177e4 LT |
1434 | |
1435 | probe_pcache(); | |
1436 | setup_scache(); | |
1437 | ||
1da177e4 LT |
1438 | r4k_blast_dcache_page_setup(); |
1439 | r4k_blast_dcache_page_indexed_setup(); | |
1440 | r4k_blast_dcache_setup(); | |
1441 | r4k_blast_icache_page_setup(); | |
1442 | r4k_blast_icache_page_indexed_setup(); | |
1443 | r4k_blast_icache_setup(); | |
1444 | r4k_blast_scache_page_setup(); | |
1445 | r4k_blast_scache_page_indexed_setup(); | |
1446 | r4k_blast_scache_setup(); | |
1447 | ||
1448 | /* | |
1449 | * Some MIPS32 and MIPS64 processors have physically indexed caches. | |
1450 | * This code supports virtually indexed processors and will be | |
1451 | * unnecessarily inefficient on physically indexed processors. | |
1452 | */ | |
73f40352 CD |
1453 | if (c->dcache.linesz) |
1454 | shm_align_mask = max_t( unsigned long, | |
1455 | c->dcache.sets * c->dcache.linesz - 1, | |
1456 | PAGE_SIZE - 1); | |
1457 | else | |
1458 | shm_align_mask = PAGE_SIZE-1; | |
9c5a3d72 RB |
1459 | |
1460 | __flush_cache_vmap = r4k__flush_cache_vmap; | |
1461 | __flush_cache_vunmap = r4k__flush_cache_vunmap; | |
1462 | ||
db813fe5 | 1463 | flush_cache_all = cache_noop; |
1da177e4 LT |
1464 | __flush_cache_all = r4k___flush_cache_all; |
1465 | flush_cache_mm = r4k_flush_cache_mm; | |
1466 | flush_cache_page = r4k_flush_cache_page; | |
1da177e4 LT |
1467 | flush_cache_range = r4k_flush_cache_range; |
1468 | ||
d9cdc901 RB |
1469 | __flush_kernel_vmap_range = r4k_flush_kernel_vmap_range; |
1470 | ||
1da177e4 LT |
1471 | flush_cache_sigtramp = r4k_flush_cache_sigtramp; |
1472 | flush_icache_all = r4k_flush_icache_all; | |
7e3bfc7c | 1473 | local_flush_data_cache_page = local_r4k_flush_data_cache_page; |
1da177e4 LT |
1474 | flush_data_cache_page = r4k_flush_data_cache_page; |
1475 | flush_icache_range = r4k_flush_icache_range; | |
e0cee3ee | 1476 | local_flush_icache_range = local_r4k_flush_icache_range; |
1da177e4 | 1477 | |
39b8d525 RB |
1478 | #if defined(CONFIG_DMA_NONCOHERENT) |
1479 | if (coherentio) { | |
1480 | _dma_cache_wback_inv = (void *)cache_noop; | |
1481 | _dma_cache_wback = (void *)cache_noop; | |
1482 | _dma_cache_inv = (void *)cache_noop; | |
1483 | } else { | |
1484 | _dma_cache_wback_inv = r4k_dma_cache_wback_inv; | |
1485 | _dma_cache_wback = r4k_dma_cache_wback_inv; | |
1486 | _dma_cache_inv = r4k_dma_cache_inv; | |
1487 | } | |
1da177e4 LT |
1488 | #endif |
1489 | ||
1da177e4 LT |
1490 | build_clear_page(); |
1491 | build_copy_page(); | |
b6d92b4a SH |
1492 | |
1493 | /* | |
1494 | * We want to run CMP kernels on core with and without coherent | |
1495 | * caches. Therefore, do not use CONFIG_MIPS_CMP to decide whether | |
1496 | * or not to flush caches. | |
1497 | */ | |
1d40cfcd | 1498 | local_r4k___flush_cache_all(NULL); |
b6d92b4a | 1499 | |
1d40cfcd | 1500 | coherency_setup(); |
9cd9669b | 1501 | board_cache_error_setup = r4k_cache_error_setup; |
1da177e4 | 1502 | } |