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Commit | Line | Data |
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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 | * | |
6 | * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) | |
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> |
1da177e4 LT |
15 | #include <linux/sched.h> |
16 | #include <linux/mm.h> | |
35133692 | 17 | #include <linux/module.h> |
1da177e4 LT |
18 | #include <linux/bitops.h> |
19 | ||
20 | #include <asm/bcache.h> | |
21 | #include <asm/bootinfo.h> | |
ec74e361 | 22 | #include <asm/cache.h> |
1da177e4 LT |
23 | #include <asm/cacheops.h> |
24 | #include <asm/cpu.h> | |
25 | #include <asm/cpu-features.h> | |
26 | #include <asm/io.h> | |
27 | #include <asm/page.h> | |
28 | #include <asm/pgtable.h> | |
29 | #include <asm/r4kcache.h> | |
e001e528 | 30 | #include <asm/sections.h> |
1da177e4 LT |
31 | #include <asm/system.h> |
32 | #include <asm/mmu_context.h> | |
33 | #include <asm/war.h> | |
ba5187db | 34 | #include <asm/cacheflush.h> /* for run_uncached() */ |
1da177e4 | 35 | |
7f3f1d01 RB |
36 | |
37 | /* | |
38 | * Special Variant of smp_call_function for use by cache functions: | |
39 | * | |
40 | * o No return value | |
41 | * o collapses to normal function call on UP kernels | |
42 | * o collapses to normal function call on systems with a single shared | |
43 | * primary cache. | |
44 | */ | |
45 | static inline void r4k_on_each_cpu(void (*func) (void *info), void *info, | |
46 | int retry, int wait) | |
47 | { | |
48 | preempt_disable(); | |
49 | ||
50 | #if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC) | |
51 | smp_call_function(func, info, retry, wait); | |
52 | #endif | |
53 | func(info); | |
54 | preempt_enable(); | |
55 | } | |
56 | ||
39b8d525 RB |
57 | #if defined(CONFIG_MIPS_CMP) |
58 | #define cpu_has_safe_index_cacheops 0 | |
59 | #else | |
60 | #define cpu_has_safe_index_cacheops 1 | |
61 | #endif | |
62 | ||
ec74e361 RB |
63 | /* |
64 | * Must die. | |
65 | */ | |
66 | static unsigned long icache_size __read_mostly; | |
67 | static unsigned long dcache_size __read_mostly; | |
68 | static unsigned long scache_size __read_mostly; | |
1da177e4 LT |
69 | |
70 | /* | |
71 | * Dummy cache handling routines for machines without boardcaches | |
72 | */ | |
73f40352 | 73 | static void cache_noop(void) {} |
1da177e4 LT |
74 | |
75 | static struct bcache_ops no_sc_ops = { | |
73f40352 CD |
76 | .bc_enable = (void *)cache_noop, |
77 | .bc_disable = (void *)cache_noop, | |
78 | .bc_wback_inv = (void *)cache_noop, | |
79 | .bc_inv = (void *)cache_noop | |
1da177e4 LT |
80 | }; |
81 | ||
82 | struct bcache_ops *bcops = &no_sc_ops; | |
83 | ||
330cfe01 TS |
84 | #define cpu_is_r4600_v1_x() ((read_c0_prid() & 0xfffffff0) == 0x00002010) |
85 | #define cpu_is_r4600_v2_x() ((read_c0_prid() & 0xfffffff0) == 0x00002020) | |
1da177e4 LT |
86 | |
87 | #define R4600_HIT_CACHEOP_WAR_IMPL \ | |
88 | do { \ | |
89 | if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x()) \ | |
90 | *(volatile unsigned long *)CKSEG1; \ | |
91 | if (R4600_V1_HIT_CACHEOP_WAR) \ | |
92 | __asm__ __volatile__("nop;nop;nop;nop"); \ | |
93 | } while (0) | |
94 | ||
95 | static void (*r4k_blast_dcache_page)(unsigned long addr); | |
96 | ||
97 | static inline void r4k_blast_dcache_page_dc32(unsigned long addr) | |
98 | { | |
99 | R4600_HIT_CACHEOP_WAR_IMPL; | |
100 | blast_dcache32_page(addr); | |
101 | } | |
102 | ||
234fcd14 | 103 | static void __cpuinit r4k_blast_dcache_page_setup(void) |
1da177e4 LT |
104 | { |
105 | unsigned long dc_lsize = cpu_dcache_line_size(); | |
106 | ||
73f40352 CD |
107 | if (dc_lsize == 0) |
108 | r4k_blast_dcache_page = (void *)cache_noop; | |
109 | else if (dc_lsize == 16) | |
1da177e4 LT |
110 | r4k_blast_dcache_page = blast_dcache16_page; |
111 | else if (dc_lsize == 32) | |
112 | r4k_blast_dcache_page = r4k_blast_dcache_page_dc32; | |
113 | } | |
114 | ||
115 | static void (* r4k_blast_dcache_page_indexed)(unsigned long addr); | |
116 | ||
234fcd14 | 117 | static void __cpuinit r4k_blast_dcache_page_indexed_setup(void) |
1da177e4 LT |
118 | { |
119 | unsigned long dc_lsize = cpu_dcache_line_size(); | |
120 | ||
73f40352 CD |
121 | if (dc_lsize == 0) |
122 | r4k_blast_dcache_page_indexed = (void *)cache_noop; | |
123 | else if (dc_lsize == 16) | |
1da177e4 LT |
124 | r4k_blast_dcache_page_indexed = blast_dcache16_page_indexed; |
125 | else if (dc_lsize == 32) | |
126 | r4k_blast_dcache_page_indexed = blast_dcache32_page_indexed; | |
127 | } | |
128 | ||
129 | static void (* r4k_blast_dcache)(void); | |
130 | ||
234fcd14 | 131 | static void __cpuinit r4k_blast_dcache_setup(void) |
1da177e4 LT |
132 | { |
133 | unsigned long dc_lsize = cpu_dcache_line_size(); | |
134 | ||
73f40352 CD |
135 | if (dc_lsize == 0) |
136 | r4k_blast_dcache = (void *)cache_noop; | |
137 | else if (dc_lsize == 16) | |
1da177e4 LT |
138 | r4k_blast_dcache = blast_dcache16; |
139 | else if (dc_lsize == 32) | |
140 | r4k_blast_dcache = blast_dcache32; | |
141 | } | |
142 | ||
143 | /* force code alignment (used for TX49XX_ICACHE_INDEX_INV_WAR) */ | |
144 | #define JUMP_TO_ALIGN(order) \ | |
145 | __asm__ __volatile__( \ | |
146 | "b\t1f\n\t" \ | |
147 | ".align\t" #order "\n\t" \ | |
148 | "1:\n\t" \ | |
149 | ) | |
150 | #define CACHE32_UNROLL32_ALIGN JUMP_TO_ALIGN(10) /* 32 * 32 = 1024 */ | |
151 | #define CACHE32_UNROLL32_ALIGN2 JUMP_TO_ALIGN(11) | |
152 | ||
153 | static inline void blast_r4600_v1_icache32(void) | |
154 | { | |
155 | unsigned long flags; | |
156 | ||
157 | local_irq_save(flags); | |
158 | blast_icache32(); | |
159 | local_irq_restore(flags); | |
160 | } | |
161 | ||
162 | static inline void tx49_blast_icache32(void) | |
163 | { | |
164 | unsigned long start = INDEX_BASE; | |
165 | unsigned long end = start + current_cpu_data.icache.waysize; | |
166 | unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit; | |
167 | unsigned long ws_end = current_cpu_data.icache.ways << | |
168 | current_cpu_data.icache.waybit; | |
169 | unsigned long ws, addr; | |
170 | ||
171 | CACHE32_UNROLL32_ALIGN2; | |
172 | /* I'm in even chunk. blast odd chunks */ | |
42a3b4f2 RB |
173 | for (ws = 0; ws < ws_end; ws += ws_inc) |
174 | for (addr = start + 0x400; addr < end; addr += 0x400 * 2) | |
21a151d8 | 175 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
1da177e4 LT |
176 | CACHE32_UNROLL32_ALIGN; |
177 | /* I'm in odd chunk. blast even chunks */ | |
42a3b4f2 RB |
178 | for (ws = 0; ws < ws_end; ws += ws_inc) |
179 | for (addr = start; addr < end; addr += 0x400 * 2) | |
21a151d8 | 180 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
1da177e4 LT |
181 | } |
182 | ||
183 | static inline void blast_icache32_r4600_v1_page_indexed(unsigned long page) | |
184 | { | |
185 | unsigned long flags; | |
186 | ||
187 | local_irq_save(flags); | |
188 | blast_icache32_page_indexed(page); | |
189 | local_irq_restore(flags); | |
190 | } | |
191 | ||
192 | static inline void tx49_blast_icache32_page_indexed(unsigned long page) | |
193 | { | |
67a3f6de AN |
194 | unsigned long indexmask = current_cpu_data.icache.waysize - 1; |
195 | unsigned long start = INDEX_BASE + (page & indexmask); | |
1da177e4 LT |
196 | unsigned long end = start + PAGE_SIZE; |
197 | unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit; | |
198 | unsigned long ws_end = current_cpu_data.icache.ways << | |
199 | current_cpu_data.icache.waybit; | |
200 | unsigned long ws, addr; | |
201 | ||
202 | CACHE32_UNROLL32_ALIGN2; | |
203 | /* I'm in even chunk. blast odd chunks */ | |
42a3b4f2 RB |
204 | for (ws = 0; ws < ws_end; ws += ws_inc) |
205 | for (addr = start + 0x400; addr < end; addr += 0x400 * 2) | |
21a151d8 | 206 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
1da177e4 LT |
207 | CACHE32_UNROLL32_ALIGN; |
208 | /* I'm in odd chunk. blast even chunks */ | |
42a3b4f2 RB |
209 | for (ws = 0; ws < ws_end; ws += ws_inc) |
210 | for (addr = start; addr < end; addr += 0x400 * 2) | |
21a151d8 | 211 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
1da177e4 LT |
212 | } |
213 | ||
214 | static void (* r4k_blast_icache_page)(unsigned long addr); | |
215 | ||
234fcd14 | 216 | static void __cpuinit r4k_blast_icache_page_setup(void) |
1da177e4 LT |
217 | { |
218 | unsigned long ic_lsize = cpu_icache_line_size(); | |
219 | ||
73f40352 CD |
220 | if (ic_lsize == 0) |
221 | r4k_blast_icache_page = (void *)cache_noop; | |
222 | else if (ic_lsize == 16) | |
1da177e4 LT |
223 | r4k_blast_icache_page = blast_icache16_page; |
224 | else if (ic_lsize == 32) | |
225 | r4k_blast_icache_page = blast_icache32_page; | |
226 | else if (ic_lsize == 64) | |
227 | r4k_blast_icache_page = blast_icache64_page; | |
228 | } | |
229 | ||
230 | ||
231 | static void (* r4k_blast_icache_page_indexed)(unsigned long addr); | |
232 | ||
234fcd14 | 233 | static void __cpuinit r4k_blast_icache_page_indexed_setup(void) |
1da177e4 LT |
234 | { |
235 | unsigned long ic_lsize = cpu_icache_line_size(); | |
236 | ||
73f40352 CD |
237 | if (ic_lsize == 0) |
238 | r4k_blast_icache_page_indexed = (void *)cache_noop; | |
239 | else if (ic_lsize == 16) | |
1da177e4 LT |
240 | r4k_blast_icache_page_indexed = blast_icache16_page_indexed; |
241 | else if (ic_lsize == 32) { | |
02fe2c9c | 242 | if (R4600_V1_INDEX_ICACHEOP_WAR && cpu_is_r4600_v1_x()) |
1da177e4 LT |
243 | r4k_blast_icache_page_indexed = |
244 | blast_icache32_r4600_v1_page_indexed; | |
02fe2c9c TS |
245 | else if (TX49XX_ICACHE_INDEX_INV_WAR) |
246 | r4k_blast_icache_page_indexed = | |
247 | tx49_blast_icache32_page_indexed; | |
1da177e4 LT |
248 | else |
249 | r4k_blast_icache_page_indexed = | |
250 | blast_icache32_page_indexed; | |
251 | } else if (ic_lsize == 64) | |
252 | r4k_blast_icache_page_indexed = blast_icache64_page_indexed; | |
253 | } | |
254 | ||
255 | static void (* r4k_blast_icache)(void); | |
256 | ||
234fcd14 | 257 | static void __cpuinit r4k_blast_icache_setup(void) |
1da177e4 LT |
258 | { |
259 | unsigned long ic_lsize = cpu_icache_line_size(); | |
260 | ||
73f40352 CD |
261 | if (ic_lsize == 0) |
262 | r4k_blast_icache = (void *)cache_noop; | |
263 | else if (ic_lsize == 16) | |
1da177e4 LT |
264 | r4k_blast_icache = blast_icache16; |
265 | else if (ic_lsize == 32) { | |
266 | if (R4600_V1_INDEX_ICACHEOP_WAR && cpu_is_r4600_v1_x()) | |
267 | r4k_blast_icache = blast_r4600_v1_icache32; | |
268 | else if (TX49XX_ICACHE_INDEX_INV_WAR) | |
269 | r4k_blast_icache = tx49_blast_icache32; | |
270 | else | |
271 | r4k_blast_icache = blast_icache32; | |
272 | } else if (ic_lsize == 64) | |
273 | r4k_blast_icache = blast_icache64; | |
274 | } | |
275 | ||
276 | static void (* r4k_blast_scache_page)(unsigned long addr); | |
277 | ||
234fcd14 | 278 | static void __cpuinit r4k_blast_scache_page_setup(void) |
1da177e4 LT |
279 | { |
280 | unsigned long sc_lsize = cpu_scache_line_size(); | |
281 | ||
4debe4f9 | 282 | if (scache_size == 0) |
73f40352 | 283 | r4k_blast_scache_page = (void *)cache_noop; |
4debe4f9 | 284 | else if (sc_lsize == 16) |
1da177e4 LT |
285 | r4k_blast_scache_page = blast_scache16_page; |
286 | else if (sc_lsize == 32) | |
287 | r4k_blast_scache_page = blast_scache32_page; | |
288 | else if (sc_lsize == 64) | |
289 | r4k_blast_scache_page = blast_scache64_page; | |
290 | else if (sc_lsize == 128) | |
291 | r4k_blast_scache_page = blast_scache128_page; | |
292 | } | |
293 | ||
294 | static void (* r4k_blast_scache_page_indexed)(unsigned long addr); | |
295 | ||
234fcd14 | 296 | static void __cpuinit r4k_blast_scache_page_indexed_setup(void) |
1da177e4 LT |
297 | { |
298 | unsigned long sc_lsize = cpu_scache_line_size(); | |
299 | ||
4debe4f9 | 300 | if (scache_size == 0) |
73f40352 | 301 | r4k_blast_scache_page_indexed = (void *)cache_noop; |
4debe4f9 | 302 | else if (sc_lsize == 16) |
1da177e4 LT |
303 | r4k_blast_scache_page_indexed = blast_scache16_page_indexed; |
304 | else if (sc_lsize == 32) | |
305 | r4k_blast_scache_page_indexed = blast_scache32_page_indexed; | |
306 | else if (sc_lsize == 64) | |
307 | r4k_blast_scache_page_indexed = blast_scache64_page_indexed; | |
308 | else if (sc_lsize == 128) | |
309 | r4k_blast_scache_page_indexed = blast_scache128_page_indexed; | |
310 | } | |
311 | ||
312 | static void (* r4k_blast_scache)(void); | |
313 | ||
234fcd14 | 314 | static void __cpuinit r4k_blast_scache_setup(void) |
1da177e4 LT |
315 | { |
316 | unsigned long sc_lsize = cpu_scache_line_size(); | |
317 | ||
4debe4f9 | 318 | if (scache_size == 0) |
73f40352 | 319 | r4k_blast_scache = (void *)cache_noop; |
4debe4f9 | 320 | else if (sc_lsize == 16) |
1da177e4 LT |
321 | r4k_blast_scache = blast_scache16; |
322 | else if (sc_lsize == 32) | |
323 | r4k_blast_scache = blast_scache32; | |
324 | else if (sc_lsize == 64) | |
325 | r4k_blast_scache = blast_scache64; | |
326 | else if (sc_lsize == 128) | |
327 | r4k_blast_scache = blast_scache128; | |
328 | } | |
329 | ||
1da177e4 LT |
330 | static inline void local_r4k___flush_cache_all(void * args) |
331 | { | |
2a21c730 FZ |
332 | #if defined(CONFIG_CPU_LOONGSON2) |
333 | r4k_blast_scache(); | |
334 | return; | |
335 | #endif | |
1da177e4 LT |
336 | r4k_blast_dcache(); |
337 | r4k_blast_icache(); | |
338 | ||
10cc3529 | 339 | switch (current_cpu_type()) { |
1da177e4 LT |
340 | case CPU_R4000SC: |
341 | case CPU_R4000MC: | |
342 | case CPU_R4400SC: | |
343 | case CPU_R4400MC: | |
344 | case CPU_R10000: | |
345 | case CPU_R12000: | |
44d921b2 | 346 | case CPU_R14000: |
1da177e4 LT |
347 | r4k_blast_scache(); |
348 | } | |
349 | } | |
350 | ||
351 | static void r4k___flush_cache_all(void) | |
352 | { | |
7f3f1d01 | 353 | r4k_on_each_cpu(local_r4k___flush_cache_all, NULL, 1, 1); |
1da177e4 LT |
354 | } |
355 | ||
a76ab5c1 RB |
356 | static inline int has_valid_asid(const struct mm_struct *mm) |
357 | { | |
358 | #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) | |
359 | int i; | |
360 | ||
361 | for_each_online_cpu(i) | |
362 | if (cpu_context(i, mm)) | |
363 | return 1; | |
364 | ||
365 | return 0; | |
366 | #else | |
367 | return cpu_context(smp_processor_id(), mm); | |
368 | #endif | |
369 | } | |
370 | ||
9c5a3d72 RB |
371 | static void r4k__flush_cache_vmap(void) |
372 | { | |
373 | r4k_blast_dcache(); | |
374 | } | |
375 | ||
376 | static void r4k__flush_cache_vunmap(void) | |
377 | { | |
378 | r4k_blast_dcache(); | |
379 | } | |
380 | ||
1da177e4 LT |
381 | static inline void local_r4k_flush_cache_range(void * args) |
382 | { | |
383 | struct vm_area_struct *vma = args; | |
2eaa7ec2 | 384 | int exec = vma->vm_flags & VM_EXEC; |
1da177e4 | 385 | |
a76ab5c1 | 386 | if (!(has_valid_asid(vma->vm_mm))) |
1da177e4 LT |
387 | return; |
388 | ||
0550d9d1 | 389 | r4k_blast_dcache(); |
2eaa7ec2 RB |
390 | if (exec) |
391 | r4k_blast_icache(); | |
1da177e4 LT |
392 | } |
393 | ||
394 | static void r4k_flush_cache_range(struct vm_area_struct *vma, | |
395 | unsigned long start, unsigned long end) | |
396 | { | |
2eaa7ec2 | 397 | int exec = vma->vm_flags & VM_EXEC; |
0550d9d1 | 398 | |
2eaa7ec2 RB |
399 | if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc)) |
400 | r4k_on_each_cpu(local_r4k_flush_cache_range, vma, 1, 1); | |
1da177e4 LT |
401 | } |
402 | ||
403 | static inline void local_r4k_flush_cache_mm(void * args) | |
404 | { | |
405 | struct mm_struct *mm = args; | |
406 | ||
a76ab5c1 | 407 | if (!has_valid_asid(mm)) |
1da177e4 LT |
408 | return; |
409 | ||
1da177e4 LT |
410 | /* |
411 | * Kludge alert. For obscure reasons R4000SC and R4400SC go nuts if we | |
412 | * only flush the primary caches but R10000 and R12000 behave sane ... | |
617667ba RB |
413 | * R4000SC and R4400SC indexed S-cache ops also invalidate primary |
414 | * caches, so we can bail out early. | |
1da177e4 | 415 | */ |
10cc3529 RB |
416 | if (current_cpu_type() == CPU_R4000SC || |
417 | current_cpu_type() == CPU_R4000MC || | |
418 | current_cpu_type() == CPU_R4400SC || | |
419 | current_cpu_type() == CPU_R4400MC) { | |
1da177e4 | 420 | r4k_blast_scache(); |
617667ba RB |
421 | return; |
422 | } | |
423 | ||
424 | r4k_blast_dcache(); | |
1da177e4 LT |
425 | } |
426 | ||
427 | static void r4k_flush_cache_mm(struct mm_struct *mm) | |
428 | { | |
429 | if (!cpu_has_dc_aliases) | |
430 | return; | |
431 | ||
7f3f1d01 | 432 | r4k_on_each_cpu(local_r4k_flush_cache_mm, mm, 1, 1); |
1da177e4 LT |
433 | } |
434 | ||
435 | struct flush_cache_page_args { | |
436 | struct vm_area_struct *vma; | |
6ec25809 | 437 | unsigned long addr; |
de62893b | 438 | unsigned long pfn; |
1da177e4 LT |
439 | }; |
440 | ||
441 | static inline void local_r4k_flush_cache_page(void *args) | |
442 | { | |
443 | struct flush_cache_page_args *fcp_args = args; | |
444 | struct vm_area_struct *vma = fcp_args->vma; | |
6ec25809 | 445 | unsigned long addr = fcp_args->addr; |
db813fe5 | 446 | struct page *page = pfn_to_page(fcp_args->pfn); |
1da177e4 LT |
447 | int exec = vma->vm_flags & VM_EXEC; |
448 | struct mm_struct *mm = vma->vm_mm; | |
449 | pgd_t *pgdp; | |
c6e8b587 | 450 | pud_t *pudp; |
1da177e4 LT |
451 | pmd_t *pmdp; |
452 | pte_t *ptep; | |
db813fe5 | 453 | void *vaddr; |
1da177e4 | 454 | |
79acf83e RB |
455 | /* |
456 | * If ownes no valid ASID yet, cannot possibly have gotten | |
457 | * this page into the cache. | |
458 | */ | |
a76ab5c1 | 459 | if (!has_valid_asid(mm)) |
79acf83e RB |
460 | return; |
461 | ||
6ec25809 RB |
462 | addr &= PAGE_MASK; |
463 | pgdp = pgd_offset(mm, addr); | |
464 | pudp = pud_offset(pgdp, addr); | |
465 | pmdp = pmd_offset(pudp, addr); | |
466 | ptep = pte_offset(pmdp, addr); | |
1da177e4 LT |
467 | |
468 | /* | |
469 | * If the page isn't marked valid, the page cannot possibly be | |
470 | * in the cache. | |
471 | */ | |
526af35e | 472 | if (!(pte_present(*ptep))) |
1da177e4 LT |
473 | return; |
474 | ||
db813fe5 RB |
475 | if ((mm == current->active_mm) && (pte_val(*ptep) & _PAGE_VALID)) |
476 | vaddr = NULL; | |
477 | else { | |
478 | /* | |
479 | * Use kmap_coherent or kmap_atomic to do flushes for | |
480 | * another ASID than the current one. | |
481 | */ | |
482 | if (cpu_has_dc_aliases) | |
483 | vaddr = kmap_coherent(page, addr); | |
484 | else | |
485 | vaddr = kmap_atomic(page, KM_USER0); | |
486 | addr = (unsigned long)vaddr; | |
1da177e4 LT |
487 | } |
488 | ||
1da177e4 | 489 | if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc)) { |
db813fe5 | 490 | r4k_blast_dcache_page(addr); |
39b8d525 RB |
491 | if (exec && !cpu_icache_snoops_remote_store) |
492 | r4k_blast_scache_page(addr); | |
1da177e4 LT |
493 | } |
494 | if (exec) { | |
db813fe5 | 495 | if (vaddr && cpu_has_vtag_icache && mm == current->active_mm) { |
1da177e4 LT |
496 | int cpu = smp_processor_id(); |
497 | ||
26a51b27 TS |
498 | if (cpu_context(cpu, mm) != 0) |
499 | drop_mmu_context(mm, cpu); | |
1da177e4 | 500 | } else |
db813fe5 RB |
501 | r4k_blast_icache_page(addr); |
502 | } | |
503 | ||
504 | if (vaddr) { | |
505 | if (cpu_has_dc_aliases) | |
506 | kunmap_coherent(); | |
507 | else | |
508 | kunmap_atomic(vaddr, KM_USER0); | |
1da177e4 LT |
509 | } |
510 | } | |
511 | ||
6ec25809 RB |
512 | static void r4k_flush_cache_page(struct vm_area_struct *vma, |
513 | unsigned long addr, unsigned long pfn) | |
1da177e4 LT |
514 | { |
515 | struct flush_cache_page_args args; | |
516 | ||
1da177e4 | 517 | args.vma = vma; |
6ec25809 | 518 | args.addr = addr; |
de62893b | 519 | args.pfn = pfn; |
1da177e4 | 520 | |
7f3f1d01 | 521 | r4k_on_each_cpu(local_r4k_flush_cache_page, &args, 1, 1); |
1da177e4 LT |
522 | } |
523 | ||
524 | static inline void local_r4k_flush_data_cache_page(void * addr) | |
525 | { | |
526 | r4k_blast_dcache_page((unsigned long) addr); | |
527 | } | |
528 | ||
529 | static void r4k_flush_data_cache_page(unsigned long addr) | |
530 | { | |
a754f708 RB |
531 | if (in_atomic()) |
532 | local_r4k_flush_data_cache_page((void *)addr); | |
533 | else | |
534 | r4k_on_each_cpu(local_r4k_flush_data_cache_page, (void *) addr, | |
535 | 1, 1); | |
1da177e4 LT |
536 | } |
537 | ||
538 | struct flush_icache_range_args { | |
d4264f18 AN |
539 | unsigned long start; |
540 | unsigned long end; | |
1da177e4 LT |
541 | }; |
542 | ||
543 | static inline void local_r4k_flush_icache_range(void *args) | |
544 | { | |
545 | struct flush_icache_range_args *fir_args = args; | |
1da177e4 LT |
546 | unsigned long start = fir_args->start; |
547 | unsigned long end = fir_args->end; | |
1da177e4 LT |
548 | |
549 | if (!cpu_has_ic_fills_f_dc) { | |
73f40352 | 550 | if (end - start >= dcache_size) { |
1da177e4 LT |
551 | r4k_blast_dcache(); |
552 | } else { | |
10a3dabd | 553 | R4600_HIT_CACHEOP_WAR_IMPL; |
41700e73 | 554 | protected_blast_dcache_range(start, end); |
1da177e4 | 555 | } |
1da177e4 LT |
556 | } |
557 | ||
558 | if (end - start > icache_size) | |
559 | r4k_blast_icache(); | |
41700e73 AN |
560 | else |
561 | protected_blast_icache_range(start, end); | |
1da177e4 LT |
562 | } |
563 | ||
d4264f18 | 564 | static void r4k_flush_icache_range(unsigned long start, unsigned long end) |
1da177e4 LT |
565 | { |
566 | struct flush_icache_range_args args; | |
567 | ||
568 | args.start = start; | |
569 | args.end = end; | |
570 | ||
7f3f1d01 | 571 | r4k_on_each_cpu(local_r4k_flush_icache_range, &args, 1, 1); |
cc61c1fe | 572 | instruction_hazard(); |
1da177e4 LT |
573 | } |
574 | ||
1da177e4 LT |
575 | #ifdef CONFIG_DMA_NONCOHERENT |
576 | ||
577 | static void r4k_dma_cache_wback_inv(unsigned long addr, unsigned long size) | |
578 | { | |
1da177e4 LT |
579 | /* Catch bad driver code */ |
580 | BUG_ON(size == 0); | |
581 | ||
fc5d2d27 | 582 | if (cpu_has_inclusive_pcaches) { |
41700e73 | 583 | if (size >= scache_size) |
1da177e4 | 584 | r4k_blast_scache(); |
41700e73 AN |
585 | else |
586 | blast_scache_range(addr, addr + size); | |
1da177e4 LT |
587 | return; |
588 | } | |
589 | ||
590 | /* | |
591 | * Either no secondary cache or the available caches don't have the | |
592 | * subset property so we have to flush the primary caches | |
593 | * explicitly | |
594 | */ | |
39b8d525 | 595 | if (cpu_has_safe_index_cacheops && size >= dcache_size) { |
1da177e4 LT |
596 | r4k_blast_dcache(); |
597 | } else { | |
1da177e4 | 598 | R4600_HIT_CACHEOP_WAR_IMPL; |
41700e73 | 599 | blast_dcache_range(addr, addr + size); |
1da177e4 LT |
600 | } |
601 | ||
602 | bc_wback_inv(addr, size); | |
603 | } | |
604 | ||
605 | static void r4k_dma_cache_inv(unsigned long addr, unsigned long size) | |
606 | { | |
1da177e4 LT |
607 | /* Catch bad driver code */ |
608 | BUG_ON(size == 0); | |
609 | ||
fc5d2d27 | 610 | if (cpu_has_inclusive_pcaches) { |
41700e73 | 611 | if (size >= scache_size) |
1da177e4 | 612 | r4k_blast_scache(); |
41700e73 | 613 | else |
e9c33572 | 614 | blast_inv_scache_range(addr, addr + size); |
1da177e4 LT |
615 | return; |
616 | } | |
617 | ||
39b8d525 | 618 | if (cpu_has_safe_index_cacheops && size >= dcache_size) { |
1da177e4 LT |
619 | r4k_blast_dcache(); |
620 | } else { | |
1da177e4 | 621 | R4600_HIT_CACHEOP_WAR_IMPL; |
e9c33572 | 622 | blast_inv_dcache_range(addr, addr + size); |
1da177e4 LT |
623 | } |
624 | ||
625 | bc_inv(addr, size); | |
626 | } | |
627 | #endif /* CONFIG_DMA_NONCOHERENT */ | |
628 | ||
629 | /* | |
630 | * While we're protected against bad userland addresses we don't care | |
631 | * very much about what happens in that case. Usually a segmentation | |
632 | * fault will dump the process later on anyway ... | |
633 | */ | |
634 | static void local_r4k_flush_cache_sigtramp(void * arg) | |
635 | { | |
02fe2c9c TS |
636 | unsigned long ic_lsize = cpu_icache_line_size(); |
637 | unsigned long dc_lsize = cpu_dcache_line_size(); | |
638 | unsigned long sc_lsize = cpu_scache_line_size(); | |
1da177e4 LT |
639 | unsigned long addr = (unsigned long) arg; |
640 | ||
641 | R4600_HIT_CACHEOP_WAR_IMPL; | |
73f40352 CD |
642 | if (dc_lsize) |
643 | protected_writeback_dcache_line(addr & ~(dc_lsize - 1)); | |
4debe4f9 | 644 | if (!cpu_icache_snoops_remote_store && scache_size) |
1da177e4 | 645 | protected_writeback_scache_line(addr & ~(sc_lsize - 1)); |
73f40352 CD |
646 | if (ic_lsize) |
647 | protected_flush_icache_line(addr & ~(ic_lsize - 1)); | |
1da177e4 LT |
648 | if (MIPS4K_ICACHE_REFILL_WAR) { |
649 | __asm__ __volatile__ ( | |
650 | ".set push\n\t" | |
651 | ".set noat\n\t" | |
652 | ".set mips3\n\t" | |
875d43e7 | 653 | #ifdef CONFIG_32BIT |
1da177e4 LT |
654 | "la $at,1f\n\t" |
655 | #endif | |
875d43e7 | 656 | #ifdef CONFIG_64BIT |
1da177e4 LT |
657 | "dla $at,1f\n\t" |
658 | #endif | |
659 | "cache %0,($at)\n\t" | |
660 | "nop; nop; nop\n" | |
661 | "1:\n\t" | |
662 | ".set pop" | |
663 | : | |
664 | : "i" (Hit_Invalidate_I)); | |
665 | } | |
666 | if (MIPS_CACHE_SYNC_WAR) | |
667 | __asm__ __volatile__ ("sync"); | |
668 | } | |
669 | ||
670 | static void r4k_flush_cache_sigtramp(unsigned long addr) | |
671 | { | |
7f3f1d01 | 672 | r4k_on_each_cpu(local_r4k_flush_cache_sigtramp, (void *) addr, 1, 1); |
1da177e4 LT |
673 | } |
674 | ||
675 | static void r4k_flush_icache_all(void) | |
676 | { | |
677 | if (cpu_has_vtag_icache) | |
678 | r4k_blast_icache(); | |
679 | } | |
680 | ||
681 | static inline void rm7k_erratum31(void) | |
682 | { | |
683 | const unsigned long ic_lsize = 32; | |
684 | unsigned long addr; | |
685 | ||
686 | /* RM7000 erratum #31. The icache is screwed at startup. */ | |
687 | write_c0_taglo(0); | |
688 | write_c0_taghi(0); | |
689 | ||
690 | for (addr = INDEX_BASE; addr <= INDEX_BASE + 4096; addr += ic_lsize) { | |
691 | __asm__ __volatile__ ( | |
d8748a3a | 692 | ".set push\n\t" |
1da177e4 LT |
693 | ".set noreorder\n\t" |
694 | ".set mips3\n\t" | |
695 | "cache\t%1, 0(%0)\n\t" | |
696 | "cache\t%1, 0x1000(%0)\n\t" | |
697 | "cache\t%1, 0x2000(%0)\n\t" | |
698 | "cache\t%1, 0x3000(%0)\n\t" | |
699 | "cache\t%2, 0(%0)\n\t" | |
700 | "cache\t%2, 0x1000(%0)\n\t" | |
701 | "cache\t%2, 0x2000(%0)\n\t" | |
702 | "cache\t%2, 0x3000(%0)\n\t" | |
703 | "cache\t%1, 0(%0)\n\t" | |
704 | "cache\t%1, 0x1000(%0)\n\t" | |
705 | "cache\t%1, 0x2000(%0)\n\t" | |
706 | "cache\t%1, 0x3000(%0)\n\t" | |
d8748a3a | 707 | ".set pop\n" |
1da177e4 LT |
708 | : |
709 | : "r" (addr), "i" (Index_Store_Tag_I), "i" (Fill)); | |
710 | } | |
711 | } | |
712 | ||
234fcd14 | 713 | static char *way_string[] __cpuinitdata = { NULL, "direct mapped", "2-way", |
1da177e4 LT |
714 | "3-way", "4-way", "5-way", "6-way", "7-way", "8-way" |
715 | }; | |
716 | ||
234fcd14 | 717 | static void __cpuinit probe_pcache(void) |
1da177e4 LT |
718 | { |
719 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
720 | unsigned int config = read_c0_config(); | |
721 | unsigned int prid = read_c0_prid(); | |
722 | unsigned long config1; | |
723 | unsigned int lsize; | |
724 | ||
725 | switch (c->cputype) { | |
726 | case CPU_R4600: /* QED style two way caches? */ | |
727 | case CPU_R4700: | |
728 | case CPU_R5000: | |
729 | case CPU_NEVADA: | |
730 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
731 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
732 | c->icache.ways = 2; | |
3c68da79 | 733 | c->icache.waybit = __ffs(icache_size/2); |
1da177e4 LT |
734 | |
735 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
736 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
737 | c->dcache.ways = 2; | |
3c68da79 | 738 | c->dcache.waybit= __ffs(dcache_size/2); |
1da177e4 LT |
739 | |
740 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
741 | break; | |
742 | ||
743 | case CPU_R5432: | |
744 | case CPU_R5500: | |
745 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
746 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
747 | c->icache.ways = 2; | |
748 | c->icache.waybit= 0; | |
749 | ||
750 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
751 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
752 | c->dcache.ways = 2; | |
753 | c->dcache.waybit = 0; | |
754 | ||
755 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
756 | break; | |
757 | ||
758 | case CPU_TX49XX: | |
759 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
760 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
761 | c->icache.ways = 4; | |
762 | c->icache.waybit= 0; | |
763 | ||
764 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
765 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
766 | c->dcache.ways = 4; | |
767 | c->dcache.waybit = 0; | |
768 | ||
769 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
de862b48 | 770 | c->options |= MIPS_CPU_PREFETCH; |
1da177e4 LT |
771 | break; |
772 | ||
773 | case CPU_R4000PC: | |
774 | case CPU_R4000SC: | |
775 | case CPU_R4000MC: | |
776 | case CPU_R4400PC: | |
777 | case CPU_R4400SC: | |
778 | case CPU_R4400MC: | |
779 | case CPU_R4300: | |
780 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
781 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
782 | c->icache.ways = 1; | |
783 | c->icache.waybit = 0; /* doesn't matter */ | |
784 | ||
785 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
786 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
787 | c->dcache.ways = 1; | |
788 | c->dcache.waybit = 0; /* does not matter */ | |
789 | ||
790 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
791 | break; | |
792 | ||
793 | case CPU_R10000: | |
794 | case CPU_R12000: | |
44d921b2 | 795 | case CPU_R14000: |
1da177e4 LT |
796 | icache_size = 1 << (12 + ((config & R10K_CONF_IC) >> 29)); |
797 | c->icache.linesz = 64; | |
798 | c->icache.ways = 2; | |
799 | c->icache.waybit = 0; | |
800 | ||
801 | dcache_size = 1 << (12 + ((config & R10K_CONF_DC) >> 26)); | |
802 | c->dcache.linesz = 32; | |
803 | c->dcache.ways = 2; | |
804 | c->dcache.waybit = 0; | |
805 | ||
806 | c->options |= MIPS_CPU_PREFETCH; | |
807 | break; | |
808 | ||
809 | case CPU_VR4133: | |
2874fe55 | 810 | write_c0_config(config & ~VR41_CONF_P4K); |
1da177e4 LT |
811 | case CPU_VR4131: |
812 | /* Workaround for cache instruction bug of VR4131 */ | |
813 | if (c->processor_id == 0x0c80U || c->processor_id == 0x0c81U || | |
814 | c->processor_id == 0x0c82U) { | |
4e8ab361 YY |
815 | config |= 0x00400000U; |
816 | if (c->processor_id == 0x0c80U) | |
817 | config |= VR41_CONF_BP; | |
1da177e4 | 818 | write_c0_config(config); |
1058ecda YY |
819 | } else |
820 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
821 | ||
1da177e4 LT |
822 | icache_size = 1 << (10 + ((config & CONF_IC) >> 9)); |
823 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
824 | c->icache.ways = 2; | |
3c68da79 | 825 | c->icache.waybit = __ffs(icache_size/2); |
1da177e4 LT |
826 | |
827 | dcache_size = 1 << (10 + ((config & CONF_DC) >> 6)); | |
828 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
829 | c->dcache.ways = 2; | |
3c68da79 | 830 | c->dcache.waybit = __ffs(dcache_size/2); |
1da177e4 LT |
831 | break; |
832 | ||
833 | case CPU_VR41XX: | |
834 | case CPU_VR4111: | |
835 | case CPU_VR4121: | |
836 | case CPU_VR4122: | |
837 | case CPU_VR4181: | |
838 | case CPU_VR4181A: | |
839 | icache_size = 1 << (10 + ((config & CONF_IC) >> 9)); | |
840 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
841 | c->icache.ways = 1; | |
842 | c->icache.waybit = 0; /* doesn't matter */ | |
843 | ||
844 | dcache_size = 1 << (10 + ((config & CONF_DC) >> 6)); | |
845 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
846 | c->dcache.ways = 1; | |
847 | c->dcache.waybit = 0; /* does not matter */ | |
848 | ||
849 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
850 | break; | |
851 | ||
852 | case CPU_RM7000: | |
853 | rm7k_erratum31(); | |
854 | ||
855 | case CPU_RM9000: | |
856 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
857 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
858 | c->icache.ways = 4; | |
3c68da79 | 859 | c->icache.waybit = __ffs(icache_size / c->icache.ways); |
1da177e4 LT |
860 | |
861 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
862 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
863 | c->dcache.ways = 4; | |
3c68da79 | 864 | c->dcache.waybit = __ffs(dcache_size / c->dcache.ways); |
1da177e4 LT |
865 | |
866 | #if !defined(CONFIG_SMP) || !defined(RM9000_CDEX_SMP_WAR) | |
867 | c->options |= MIPS_CPU_CACHE_CDEX_P; | |
868 | #endif | |
869 | c->options |= MIPS_CPU_PREFETCH; | |
870 | break; | |
871 | ||
2a21c730 FZ |
872 | case CPU_LOONGSON2: |
873 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); | |
874 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); | |
875 | if (prid & 0x3) | |
876 | c->icache.ways = 4; | |
877 | else | |
878 | c->icache.ways = 2; | |
879 | c->icache.waybit = 0; | |
880 | ||
881 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); | |
882 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); | |
883 | if (prid & 0x3) | |
884 | c->dcache.ways = 4; | |
885 | else | |
886 | c->dcache.ways = 2; | |
887 | c->dcache.waybit = 0; | |
888 | break; | |
889 | ||
1da177e4 LT |
890 | default: |
891 | if (!(config & MIPS_CONF_M)) | |
892 | panic("Don't know how to probe P-caches on this cpu."); | |
893 | ||
894 | /* | |
895 | * So we seem to be a MIPS32 or MIPS64 CPU | |
896 | * So let's probe the I-cache ... | |
897 | */ | |
898 | config1 = read_c0_config1(); | |
899 | ||
900 | if ((lsize = ((config1 >> 19) & 7))) | |
901 | c->icache.linesz = 2 << lsize; | |
902 | else | |
903 | c->icache.linesz = lsize; | |
904 | c->icache.sets = 64 << ((config1 >> 22) & 7); | |
905 | c->icache.ways = 1 + ((config1 >> 16) & 7); | |
906 | ||
907 | icache_size = c->icache.sets * | |
908 | c->icache.ways * | |
909 | c->icache.linesz; | |
3c68da79 | 910 | c->icache.waybit = __ffs(icache_size/c->icache.ways); |
1da177e4 LT |
911 | |
912 | if (config & 0x8) /* VI bit */ | |
913 | c->icache.flags |= MIPS_CACHE_VTAG; | |
914 | ||
915 | /* | |
916 | * Now probe the MIPS32 / MIPS64 data cache. | |
917 | */ | |
918 | c->dcache.flags = 0; | |
919 | ||
920 | if ((lsize = ((config1 >> 10) & 7))) | |
921 | c->dcache.linesz = 2 << lsize; | |
922 | else | |
923 | c->dcache.linesz= lsize; | |
924 | c->dcache.sets = 64 << ((config1 >> 13) & 7); | |
925 | c->dcache.ways = 1 + ((config1 >> 7) & 7); | |
926 | ||
927 | dcache_size = c->dcache.sets * | |
928 | c->dcache.ways * | |
929 | c->dcache.linesz; | |
3c68da79 | 930 | c->dcache.waybit = __ffs(dcache_size/c->dcache.ways); |
1da177e4 LT |
931 | |
932 | c->options |= MIPS_CPU_PREFETCH; | |
933 | break; | |
934 | } | |
935 | ||
936 | /* | |
937 | * Processor configuration sanity check for the R4000SC erratum | |
938 | * #5. With page sizes larger than 32kB there is no possibility | |
939 | * to get a VCE exception anymore so we don't care about this | |
940 | * misconfiguration. The case is rather theoretical anyway; | |
941 | * presumably no vendor is shipping his hardware in the "bad" | |
942 | * configuration. | |
943 | */ | |
944 | if ((prid & 0xff00) == PRID_IMP_R4000 && (prid & 0xff) < 0x40 && | |
945 | !(config & CONF_SC) && c->icache.linesz != 16 && | |
946 | PAGE_SIZE <= 0x8000) | |
947 | panic("Improper R4000SC processor configuration detected"); | |
948 | ||
949 | /* compute a couple of other cache variables */ | |
950 | c->icache.waysize = icache_size / c->icache.ways; | |
951 | c->dcache.waysize = dcache_size / c->dcache.ways; | |
952 | ||
73f40352 CD |
953 | c->icache.sets = c->icache.linesz ? |
954 | icache_size / (c->icache.linesz * c->icache.ways) : 0; | |
955 | c->dcache.sets = c->dcache.linesz ? | |
956 | dcache_size / (c->dcache.linesz * c->dcache.ways) : 0; | |
1da177e4 LT |
957 | |
958 | /* | |
959 | * R10000 and R12000 P-caches are odd in a positive way. They're 32kB | |
960 | * 2-way virtually indexed so normally would suffer from aliases. So | |
961 | * normally they'd suffer from aliases but magic in the hardware deals | |
962 | * with that for us so we don't need to take care ourselves. | |
963 | */ | |
d1e344e5 | 964 | switch (c->cputype) { |
a95970f3 | 965 | case CPU_20KC: |
505403b6 | 966 | case CPU_25KF: |
641e97f3 RB |
967 | case CPU_SB1: |
968 | case CPU_SB1A: | |
de62893b | 969 | c->dcache.flags |= MIPS_CACHE_PINDEX; |
641e97f3 RB |
970 | break; |
971 | ||
d1e344e5 RB |
972 | case CPU_R10000: |
973 | case CPU_R12000: | |
44d921b2 | 974 | case CPU_R14000: |
d1e344e5 | 975 | break; |
641e97f3 | 976 | |
d1e344e5 | 977 | case CPU_24K: |
98a41de9 | 978 | case CPU_34K: |
2e78ae3f | 979 | case CPU_74K: |
39b8d525 | 980 | case CPU_1004K: |
beab375a RB |
981 | if ((read_c0_config7() & (1 << 16))) { |
982 | /* effectively physically indexed dcache, | |
983 | thus no virtual aliases. */ | |
984 | c->dcache.flags |= MIPS_CACHE_PINDEX; | |
985 | break; | |
986 | } | |
d1e344e5 | 987 | default: |
beab375a RB |
988 | if (c->dcache.waysize > PAGE_SIZE) |
989 | c->dcache.flags |= MIPS_CACHE_ALIASES; | |
d1e344e5 | 990 | } |
1da177e4 LT |
991 | |
992 | switch (c->cputype) { | |
993 | case CPU_20KC: | |
994 | /* | |
995 | * Some older 20Kc chips doesn't have the 'VI' bit in | |
996 | * the config register. | |
997 | */ | |
998 | c->icache.flags |= MIPS_CACHE_VTAG; | |
999 | break; | |
1000 | ||
e3ad1c23 | 1001 | case CPU_AU1000: |
1da177e4 | 1002 | case CPU_AU1500: |
e3ad1c23 PP |
1003 | case CPU_AU1100: |
1004 | case CPU_AU1550: | |
1005 | case CPU_AU1200: | |
237cfee1 ML |
1006 | case CPU_AU1210: |
1007 | case CPU_AU1250: | |
1da177e4 LT |
1008 | c->icache.flags |= MIPS_CACHE_IC_F_DC; |
1009 | break; | |
1010 | } | |
1011 | ||
2a21c730 FZ |
1012 | #ifdef CONFIG_CPU_LOONGSON2 |
1013 | /* | |
1014 | * LOONGSON2 has 4 way icache, but when using indexed cache op, | |
1015 | * one op will act on all 4 ways | |
1016 | */ | |
1017 | c->icache.ways = 1; | |
1018 | #endif | |
1019 | ||
1da177e4 LT |
1020 | printk("Primary instruction cache %ldkB, %s, %s, linesize %d bytes.\n", |
1021 | icache_size >> 10, | |
64bfca5c | 1022 | cpu_has_vtag_icache ? "VIVT" : "VIPT", |
1da177e4 LT |
1023 | way_string[c->icache.ways], c->icache.linesz); |
1024 | ||
64bfca5c RB |
1025 | printk("Primary data cache %ldkB, %s, %s, %s, linesize %d bytes\n", |
1026 | dcache_size >> 10, way_string[c->dcache.ways], | |
1027 | (c->dcache.flags & MIPS_CACHE_PINDEX) ? "PIPT" : "VIPT", | |
1028 | (c->dcache.flags & MIPS_CACHE_ALIASES) ? | |
1029 | "cache aliases" : "no aliases", | |
1030 | c->dcache.linesz); | |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | /* | |
1034 | * If you even _breathe_ on this function, look at the gcc output and make sure | |
1035 | * it does not pop things on and off the stack for the cache sizing loop that | |
1036 | * executes in KSEG1 space or else you will crash and burn badly. You have | |
1037 | * been warned. | |
1038 | */ | |
234fcd14 | 1039 | static int __cpuinit probe_scache(void) |
1da177e4 | 1040 | { |
1da177e4 LT |
1041 | unsigned long flags, addr, begin, end, pow2; |
1042 | unsigned int config = read_c0_config(); | |
1043 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1044 | int tmp; | |
1045 | ||
1046 | if (config & CONF_SC) | |
1047 | return 0; | |
1048 | ||
e001e528 | 1049 | begin = (unsigned long) &_stext; |
1da177e4 LT |
1050 | begin &= ~((4 * 1024 * 1024) - 1); |
1051 | end = begin + (4 * 1024 * 1024); | |
1052 | ||
1053 | /* | |
1054 | * This is such a bitch, you'd think they would make it easy to do | |
1055 | * this. Away you daemons of stupidity! | |
1056 | */ | |
1057 | local_irq_save(flags); | |
1058 | ||
1059 | /* Fill each size-multiple cache line with a valid tag. */ | |
1060 | pow2 = (64 * 1024); | |
1061 | for (addr = begin; addr < end; addr = (begin + pow2)) { | |
1062 | unsigned long *p = (unsigned long *) addr; | |
1063 | __asm__ __volatile__("nop" : : "r" (*p)); /* whee... */ | |
1064 | pow2 <<= 1; | |
1065 | } | |
1066 | ||
1067 | /* Load first line with zero (therefore invalid) tag. */ | |
1068 | write_c0_taglo(0); | |
1069 | write_c0_taghi(0); | |
1070 | __asm__ __volatile__("nop; nop; nop; nop;"); /* avoid the hazard */ | |
1071 | cache_op(Index_Store_Tag_I, begin); | |
1072 | cache_op(Index_Store_Tag_D, begin); | |
1073 | cache_op(Index_Store_Tag_SD, begin); | |
1074 | ||
1075 | /* Now search for the wrap around point. */ | |
1076 | pow2 = (128 * 1024); | |
1077 | tmp = 0; | |
1078 | for (addr = begin + (128 * 1024); addr < end; addr = begin + pow2) { | |
1079 | cache_op(Index_Load_Tag_SD, addr); | |
1080 | __asm__ __volatile__("nop; nop; nop; nop;"); /* hazard... */ | |
1081 | if (!read_c0_taglo()) | |
1082 | break; | |
1083 | pow2 <<= 1; | |
1084 | } | |
1085 | local_irq_restore(flags); | |
1086 | addr -= begin; | |
1087 | ||
1088 | scache_size = addr; | |
1089 | c->scache.linesz = 16 << ((config & R4K_CONF_SB) >> 22); | |
1090 | c->scache.ways = 1; | |
1091 | c->dcache.waybit = 0; /* does not matter */ | |
1092 | ||
1093 | return 1; | |
1094 | } | |
1095 | ||
2a21c730 FZ |
1096 | #if defined(CONFIG_CPU_LOONGSON2) |
1097 | static void __init loongson2_sc_init(void) | |
1098 | { | |
1099 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1100 | ||
1101 | scache_size = 512*1024; | |
1102 | c->scache.linesz = 32; | |
1103 | c->scache.ways = 4; | |
1104 | c->scache.waybit = 0; | |
1105 | c->scache.waysize = scache_size / (c->scache.ways); | |
1106 | c->scache.sets = scache_size / (c->scache.linesz * c->scache.ways); | |
1107 | pr_info("Unified secondary cache %ldkB %s, linesize %d bytes.\n", | |
1108 | scache_size >> 10, way_string[c->scache.ways], c->scache.linesz); | |
1109 | ||
1110 | c->options |= MIPS_CPU_INCLUSIVE_CACHES; | |
1111 | } | |
1112 | #endif | |
1113 | ||
1da177e4 LT |
1114 | extern int r5k_sc_init(void); |
1115 | extern int rm7k_sc_init(void); | |
9318c51a | 1116 | extern int mips_sc_init(void); |
1da177e4 | 1117 | |
234fcd14 | 1118 | static void __cpuinit setup_scache(void) |
1da177e4 LT |
1119 | { |
1120 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1121 | unsigned int config = read_c0_config(); | |
1da177e4 LT |
1122 | int sc_present = 0; |
1123 | ||
1124 | /* | |
1125 | * Do the probing thing on R4000SC and R4400SC processors. Other | |
1126 | * processors don't have a S-cache that would be relevant to the | |
603e82ed | 1127 | * Linux memory management. |
1da177e4 LT |
1128 | */ |
1129 | switch (c->cputype) { | |
1130 | case CPU_R4000SC: | |
1131 | case CPU_R4000MC: | |
1132 | case CPU_R4400SC: | |
1133 | case CPU_R4400MC: | |
ba5187db | 1134 | sc_present = run_uncached(probe_scache); |
1da177e4 LT |
1135 | if (sc_present) |
1136 | c->options |= MIPS_CPU_CACHE_CDEX_S; | |
1137 | break; | |
1138 | ||
1139 | case CPU_R10000: | |
1140 | case CPU_R12000: | |
44d921b2 | 1141 | case CPU_R14000: |
1da177e4 LT |
1142 | scache_size = 0x80000 << ((config & R10K_CONF_SS) >> 16); |
1143 | c->scache.linesz = 64 << ((config >> 13) & 1); | |
1144 | c->scache.ways = 2; | |
1145 | c->scache.waybit= 0; | |
1146 | sc_present = 1; | |
1147 | break; | |
1148 | ||
1149 | case CPU_R5000: | |
1150 | case CPU_NEVADA: | |
1151 | #ifdef CONFIG_R5000_CPU_SCACHE | |
1152 | r5k_sc_init(); | |
1153 | #endif | |
1154 | return; | |
1155 | ||
1156 | case CPU_RM7000: | |
1157 | case CPU_RM9000: | |
1158 | #ifdef CONFIG_RM7000_CPU_SCACHE | |
1159 | rm7k_sc_init(); | |
1160 | #endif | |
1161 | return; | |
1162 | ||
2a21c730 FZ |
1163 | #if defined(CONFIG_CPU_LOONGSON2) |
1164 | case CPU_LOONGSON2: | |
1165 | loongson2_sc_init(); | |
1166 | return; | |
1167 | #endif | |
1168 | ||
1da177e4 | 1169 | default: |
9318c51a CD |
1170 | if (c->isa_level == MIPS_CPU_ISA_M32R1 || |
1171 | c->isa_level == MIPS_CPU_ISA_M32R2 || | |
1172 | c->isa_level == MIPS_CPU_ISA_M64R1 || | |
1173 | c->isa_level == MIPS_CPU_ISA_M64R2) { | |
1174 | #ifdef CONFIG_MIPS_CPU_SCACHE | |
1175 | if (mips_sc_init ()) { | |
1176 | scache_size = c->scache.ways * c->scache.sets * c->scache.linesz; | |
1177 | printk("MIPS secondary cache %ldkB, %s, linesize %d bytes.\n", | |
1178 | scache_size >> 10, | |
1179 | way_string[c->scache.ways], c->scache.linesz); | |
1180 | } | |
1181 | #else | |
1182 | if (!(c->scache.flags & MIPS_CACHE_NOT_PRESENT)) | |
1183 | panic("Dunno how to handle MIPS32 / MIPS64 second level cache"); | |
1184 | #endif | |
1185 | return; | |
1186 | } | |
1da177e4 LT |
1187 | sc_present = 0; |
1188 | } | |
1189 | ||
1190 | if (!sc_present) | |
1191 | return; | |
1192 | ||
1da177e4 LT |
1193 | /* compute a couple of other cache variables */ |
1194 | c->scache.waysize = scache_size / c->scache.ways; | |
1195 | ||
1196 | c->scache.sets = scache_size / (c->scache.linesz * c->scache.ways); | |
1197 | ||
1198 | printk("Unified secondary cache %ldkB %s, linesize %d bytes.\n", | |
1199 | scache_size >> 10, way_string[c->scache.ways], c->scache.linesz); | |
1200 | ||
fc5d2d27 | 1201 | c->options |= MIPS_CPU_INCLUSIVE_CACHES; |
1da177e4 LT |
1202 | } |
1203 | ||
9370b351 SS |
1204 | void au1x00_fixup_config_od(void) |
1205 | { | |
1206 | /* | |
1207 | * c0_config.od (bit 19) was write only (and read as 0) | |
1208 | * on the early revisions of Alchemy SOCs. It disables the bus | |
1209 | * transaction overlapping and needs to be set to fix various errata. | |
1210 | */ | |
1211 | switch (read_c0_prid()) { | |
1212 | case 0x00030100: /* Au1000 DA */ | |
1213 | case 0x00030201: /* Au1000 HA */ | |
1214 | case 0x00030202: /* Au1000 HB */ | |
1215 | case 0x01030200: /* Au1500 AB */ | |
1216 | /* | |
1217 | * Au1100 errata actually keeps silence about this bit, so we set it | |
1218 | * just in case for those revisions that require it to be set according | |
1219 | * to arch/mips/au1000/common/cputable.c | |
1220 | */ | |
1221 | case 0x02030200: /* Au1100 AB */ | |
1222 | case 0x02030201: /* Au1100 BA */ | |
1223 | case 0x02030202: /* Au1100 BC */ | |
1224 | set_c0_config(1 << 19); | |
1225 | break; | |
1226 | } | |
1227 | } | |
1228 | ||
35133692 CD |
1229 | static int __cpuinitdata cca = -1; |
1230 | ||
1231 | static int __init cca_setup(char *str) | |
1232 | { | |
1233 | get_option(&str, &cca); | |
1234 | ||
1235 | return 1; | |
1236 | } | |
1237 | ||
1238 | __setup("cca=", cca_setup); | |
1239 | ||
234fcd14 | 1240 | static void __cpuinit coherency_setup(void) |
1da177e4 | 1241 | { |
35133692 CD |
1242 | if (cca < 0 || cca > 7) |
1243 | cca = read_c0_config() & CONF_CM_CMASK; | |
1244 | _page_cachable_default = cca << _CACHE_SHIFT; | |
1245 | ||
1246 | pr_debug("Using cache attribute %d\n", cca); | |
1247 | change_c0_config(CONF_CM_CMASK, cca); | |
1da177e4 LT |
1248 | |
1249 | /* | |
1250 | * c0_status.cu=0 specifies that updates by the sc instruction use | |
1251 | * the coherency mode specified by the TLB; 1 means cachable | |
1252 | * coherent update on write will be used. Not all processors have | |
1253 | * this bit and; some wire it to zero, others like Toshiba had the | |
1254 | * silly idea of putting something else there ... | |
1255 | */ | |
10cc3529 | 1256 | switch (current_cpu_type()) { |
1da177e4 LT |
1257 | case CPU_R4000PC: |
1258 | case CPU_R4000SC: | |
1259 | case CPU_R4000MC: | |
1260 | case CPU_R4400PC: | |
1261 | case CPU_R4400SC: | |
1262 | case CPU_R4400MC: | |
1263 | clear_c0_config(CONF_CU); | |
1264 | break; | |
9370b351 | 1265 | /* |
df586d59 | 1266 | * We need to catch the early Alchemy SOCs with |
9370b351 SS |
1267 | * the write-only co_config.od bit and set it back to one... |
1268 | */ | |
1269 | case CPU_AU1000: /* rev. DA, HA, HB */ | |
1270 | case CPU_AU1100: /* rev. AB, BA, BC ?? */ | |
1271 | case CPU_AU1500: /* rev. AB */ | |
1272 | au1x00_fixup_config_od(); | |
1273 | break; | |
1da177e4 LT |
1274 | } |
1275 | } | |
1276 | ||
39b8d525 RB |
1277 | #if defined(CONFIG_DMA_NONCOHERENT) |
1278 | ||
1279 | static int __cpuinitdata coherentio; | |
1280 | ||
1281 | static int __init setcoherentio(char *str) | |
1282 | { | |
1283 | coherentio = 1; | |
1284 | ||
1285 | return 1; | |
1286 | } | |
1287 | ||
1288 | __setup("coherentio", setcoherentio); | |
1289 | #endif | |
1290 | ||
234fcd14 | 1291 | void __cpuinit r4k_cache_init(void) |
1da177e4 LT |
1292 | { |
1293 | extern void build_clear_page(void); | |
1294 | extern void build_copy_page(void); | |
641e97f3 RB |
1295 | extern char __weak except_vec2_generic; |
1296 | extern char __weak except_vec2_sb1; | |
1da177e4 LT |
1297 | struct cpuinfo_mips *c = ¤t_cpu_data; |
1298 | ||
641e97f3 RB |
1299 | switch (c->cputype) { |
1300 | case CPU_SB1: | |
1301 | case CPU_SB1A: | |
1302 | set_uncached_handler(0x100, &except_vec2_sb1, 0x80); | |
1303 | break; | |
1304 | ||
1305 | default: | |
1306 | set_uncached_handler(0x100, &except_vec2_generic, 0x80); | |
1307 | break; | |
1308 | } | |
1da177e4 LT |
1309 | |
1310 | probe_pcache(); | |
1311 | setup_scache(); | |
1312 | ||
1da177e4 LT |
1313 | r4k_blast_dcache_page_setup(); |
1314 | r4k_blast_dcache_page_indexed_setup(); | |
1315 | r4k_blast_dcache_setup(); | |
1316 | r4k_blast_icache_page_setup(); | |
1317 | r4k_blast_icache_page_indexed_setup(); | |
1318 | r4k_blast_icache_setup(); | |
1319 | r4k_blast_scache_page_setup(); | |
1320 | r4k_blast_scache_page_indexed_setup(); | |
1321 | r4k_blast_scache_setup(); | |
1322 | ||
1323 | /* | |
1324 | * Some MIPS32 and MIPS64 processors have physically indexed caches. | |
1325 | * This code supports virtually indexed processors and will be | |
1326 | * unnecessarily inefficient on physically indexed processors. | |
1327 | */ | |
73f40352 CD |
1328 | if (c->dcache.linesz) |
1329 | shm_align_mask = max_t( unsigned long, | |
1330 | c->dcache.sets * c->dcache.linesz - 1, | |
1331 | PAGE_SIZE - 1); | |
1332 | else | |
1333 | shm_align_mask = PAGE_SIZE-1; | |
9c5a3d72 RB |
1334 | |
1335 | __flush_cache_vmap = r4k__flush_cache_vmap; | |
1336 | __flush_cache_vunmap = r4k__flush_cache_vunmap; | |
1337 | ||
db813fe5 | 1338 | flush_cache_all = cache_noop; |
1da177e4 LT |
1339 | __flush_cache_all = r4k___flush_cache_all; |
1340 | flush_cache_mm = r4k_flush_cache_mm; | |
1341 | flush_cache_page = r4k_flush_cache_page; | |
1da177e4 LT |
1342 | flush_cache_range = r4k_flush_cache_range; |
1343 | ||
1344 | flush_cache_sigtramp = r4k_flush_cache_sigtramp; | |
1345 | flush_icache_all = r4k_flush_icache_all; | |
7e3bfc7c | 1346 | local_flush_data_cache_page = local_r4k_flush_data_cache_page; |
1da177e4 LT |
1347 | flush_data_cache_page = r4k_flush_data_cache_page; |
1348 | flush_icache_range = r4k_flush_icache_range; | |
1349 | ||
39b8d525 RB |
1350 | #if defined(CONFIG_DMA_NONCOHERENT) |
1351 | if (coherentio) { | |
1352 | _dma_cache_wback_inv = (void *)cache_noop; | |
1353 | _dma_cache_wback = (void *)cache_noop; | |
1354 | _dma_cache_inv = (void *)cache_noop; | |
1355 | } else { | |
1356 | _dma_cache_wback_inv = r4k_dma_cache_wback_inv; | |
1357 | _dma_cache_wback = r4k_dma_cache_wback_inv; | |
1358 | _dma_cache_inv = r4k_dma_cache_inv; | |
1359 | } | |
1da177e4 LT |
1360 | #endif |
1361 | ||
1da177e4 LT |
1362 | build_clear_page(); |
1363 | build_copy_page(); | |
39b8d525 | 1364 | #if !defined(CONFIG_MIPS_CMP) |
1d40cfcd | 1365 | local_r4k___flush_cache_all(NULL); |
39b8d525 | 1366 | #endif |
1d40cfcd | 1367 | coherency_setup(); |
1da177e4 | 1368 | } |