Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Processor capabilities determination functions. | |
3 | * | |
4 | * Copyright (C) xxxx the Anonymous | |
010b853b | 5 | * Copyright (C) 1994 - 2006 Ralf Baechle |
4194318c | 6 | * Copyright (C) 2003, 2004 Maciej W. Rozycki |
4194318c | 7 | * Copyright (C) 2001, 2004 MIPS Inc. |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
1da177e4 LT |
14 | #include <linux/init.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/ptrace.h> | |
631330f5 | 17 | #include <linux/smp.h> |
1da177e4 LT |
18 | #include <linux/stddef.h> |
19 | ||
5759906c | 20 | #include <asm/bugs.h> |
1da177e4 LT |
21 | #include <asm/cpu.h> |
22 | #include <asm/fpu.h> | |
23 | #include <asm/mipsregs.h> | |
24 | #include <asm/system.h> | |
654f57bf | 25 | #include <asm/watch.h> |
1da177e4 LT |
26 | |
27 | /* | |
28 | * Not all of the MIPS CPUs have the "wait" instruction available. Moreover, | |
29 | * the implementation of the "wait" feature differs between CPU families. This | |
30 | * points to the function that implements CPU specific wait. | |
31 | * The wait instruction stops the pipeline and reduces the power consumption of | |
32 | * the CPU very much. | |
33 | */ | |
34 | void (*cpu_wait)(void) = NULL; | |
35 | ||
36 | static void r3081_wait(void) | |
37 | { | |
38 | unsigned long cfg = read_c0_conf(); | |
39 | write_c0_conf(cfg | R30XX_CONF_HALT); | |
40 | } | |
41 | ||
42 | static void r39xx_wait(void) | |
43 | { | |
60a6c377 AN |
44 | local_irq_disable(); |
45 | if (!need_resched()) | |
46 | write_c0_conf(read_c0_conf() | TX39_CONF_HALT); | |
47 | local_irq_enable(); | |
1da177e4 LT |
48 | } |
49 | ||
c65a5480 | 50 | extern void r4k_wait(void); |
60a6c377 AN |
51 | |
52 | /* | |
53 | * This variant is preferable as it allows testing need_resched and going to | |
54 | * sleep depending on the outcome atomically. Unfortunately the "It is | |
55 | * implementation-dependent whether the pipeline restarts when a non-enabled | |
56 | * interrupt is requested" restriction in the MIPS32/MIPS64 architecture makes | |
57 | * using this version a gamble. | |
58 | */ | |
8531a35e | 59 | void r4k_wait_irqoff(void) |
60a6c377 AN |
60 | { |
61 | local_irq_disable(); | |
62 | if (!need_resched()) | |
8531a35e KK |
63 | __asm__(" .set push \n" |
64 | " .set mips3 \n" | |
60a6c377 | 65 | " wait \n" |
8531a35e | 66 | " .set pop \n"); |
60a6c377 | 67 | local_irq_enable(); |
8531a35e KK |
68 | __asm__(" .globl __pastwait \n" |
69 | "__pastwait: \n"); | |
70 | return; | |
1da177e4 LT |
71 | } |
72 | ||
5a812999 RB |
73 | /* |
74 | * The RM7000 variant has to handle erratum 38. The workaround is to not | |
75 | * have any pending stores when the WAIT instruction is executed. | |
76 | */ | |
77 | static void rm7k_wait_irqoff(void) | |
78 | { | |
79 | local_irq_disable(); | |
80 | if (!need_resched()) | |
81 | __asm__( | |
82 | " .set push \n" | |
83 | " .set mips3 \n" | |
84 | " .set noat \n" | |
85 | " mfc0 $1, $12 \n" | |
86 | " sync \n" | |
87 | " mtc0 $1, $12 # stalls until W stage \n" | |
88 | " wait \n" | |
89 | " mtc0 $1, $12 # stalls until W stage \n" | |
90 | " .set pop \n"); | |
91 | local_irq_enable(); | |
92 | } | |
93 | ||
2882b0c6 ML |
94 | /* |
95 | * The Au1xxx wait is available only if using 32khz counter or | |
96 | * external timer source, but specifically not CP0 Counter. | |
97 | * alchemy/common/time.c may override cpu_wait! | |
98 | */ | |
494900af | 99 | static void au1k_wait(void) |
1da177e4 | 100 | { |
60a6c377 AN |
101 | __asm__(" .set mips3 \n" |
102 | " cache 0x14, 0(%0) \n" | |
103 | " cache 0x14, 32(%0) \n" | |
104 | " sync \n" | |
105 | " nop \n" | |
106 | " wait \n" | |
107 | " nop \n" | |
108 | " nop \n" | |
109 | " nop \n" | |
110 | " nop \n" | |
111 | " .set mips0 \n" | |
10f650db | 112 | : : "r" (au1k_wait)); |
1da177e4 LT |
113 | } |
114 | ||
55d04dff RB |
115 | static int __initdata nowait = 0; |
116 | ||
f49a747c | 117 | static int __init wait_disable(char *s) |
55d04dff RB |
118 | { |
119 | nowait = 1; | |
120 | ||
121 | return 1; | |
122 | } | |
123 | ||
124 | __setup("nowait", wait_disable); | |
125 | ||
c65a5480 | 126 | void __init check_wait(void) |
1da177e4 LT |
127 | { |
128 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
129 | ||
55d04dff | 130 | if (nowait) { |
c2379230 | 131 | printk("Wait instruction disabled.\n"); |
55d04dff RB |
132 | return; |
133 | } | |
134 | ||
1da177e4 LT |
135 | switch (c->cputype) { |
136 | case CPU_R3081: | |
137 | case CPU_R3081E: | |
138 | cpu_wait = r3081_wait; | |
1da177e4 LT |
139 | break; |
140 | case CPU_TX3927: | |
141 | cpu_wait = r39xx_wait; | |
1da177e4 LT |
142 | break; |
143 | case CPU_R4200: | |
144 | /* case CPU_R4300: */ | |
145 | case CPU_R4600: | |
146 | case CPU_R4640: | |
147 | case CPU_R4650: | |
148 | case CPU_R4700: | |
149 | case CPU_R5000: | |
a644b277 | 150 | case CPU_R5500: |
1da177e4 | 151 | case CPU_NEVADA: |
1da177e4 LT |
152 | case CPU_4KC: |
153 | case CPU_4KEC: | |
154 | case CPU_4KSC: | |
155 | case CPU_5KC: | |
1da177e4 | 156 | case CPU_25KF: |
4b3e975e | 157 | case CPU_PR4450: |
1c0c13eb | 158 | case CPU_BCM3302: |
0dd4781b | 159 | case CPU_CAVIUM_OCTEON: |
4b3e975e RB |
160 | cpu_wait = r4k_wait; |
161 | break; | |
162 | ||
5a812999 RB |
163 | case CPU_RM7000: |
164 | cpu_wait = rm7k_wait_irqoff; | |
165 | break; | |
166 | ||
4b3e975e | 167 | case CPU_24K: |
bbc7f22f | 168 | case CPU_34K: |
39b8d525 | 169 | case CPU_1004K: |
4b3e975e RB |
170 | cpu_wait = r4k_wait; |
171 | if (read_c0_config7() & MIPS_CONF7_WII) | |
172 | cpu_wait = r4k_wait_irqoff; | |
173 | break; | |
174 | ||
c620953c | 175 | case CPU_74K: |
1da177e4 | 176 | cpu_wait = r4k_wait; |
4b3e975e RB |
177 | if ((c->processor_id & 0xff) >= PRID_REV_ENCODE_332(2, 1, 0)) |
178 | cpu_wait = r4k_wait_irqoff; | |
1da177e4 | 179 | break; |
4b3e975e | 180 | |
60a6c377 AN |
181 | case CPU_TX49XX: |
182 | cpu_wait = r4k_wait_irqoff; | |
60a6c377 | 183 | break; |
270717a8 | 184 | case CPU_ALCHEMY: |
0c694de1 | 185 | cpu_wait = au1k_wait; |
1da177e4 | 186 | break; |
c8eae71d RB |
187 | case CPU_20KC: |
188 | /* | |
189 | * WAIT on Rev1.0 has E1, E2, E3 and E16. | |
190 | * WAIT on Rev2.0 and Rev3.0 has E16. | |
191 | * Rev3.1 WAIT is nop, why bother | |
192 | */ | |
193 | if ((c->processor_id & 0xff) <= 0x64) | |
194 | break; | |
195 | ||
50da469a RB |
196 | /* |
197 | * Another rev is incremeting c0_count at a reduced clock | |
198 | * rate while in WAIT mode. So we basically have the choice | |
199 | * between using the cp0 timer as clocksource or avoiding | |
200 | * the WAIT instruction. Until more details are known, | |
201 | * disable the use of WAIT for 20Kc entirely. | |
202 | cpu_wait = r4k_wait; | |
203 | */ | |
c8eae71d | 204 | break; |
441ee341 | 205 | case CPU_RM9000: |
c2379230 | 206 | if ((c->processor_id & 0x00ff) >= 0x40) |
441ee341 | 207 | cpu_wait = r4k_wait; |
441ee341 | 208 | break; |
1da177e4 | 209 | default: |
1da177e4 LT |
210 | break; |
211 | } | |
212 | } | |
213 | ||
9267a30d MSJ |
214 | static inline void check_errata(void) |
215 | { | |
216 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
217 | ||
218 | switch (c->cputype) { | |
219 | case CPU_34K: | |
220 | /* | |
221 | * Erratum "RPS May Cause Incorrect Instruction Execution" | |
222 | * This code only handles VPE0, any SMP/SMTC/RTOS code | |
223 | * making use of VPE1 will be responsable for that VPE. | |
224 | */ | |
225 | if ((c->processor_id & PRID_REV_MASK) <= PRID_REV_34K_V1_0_2) | |
226 | write_c0_config7(read_c0_config7() | MIPS_CONF7_RPS); | |
227 | break; | |
228 | default: | |
229 | break; | |
230 | } | |
231 | } | |
232 | ||
1da177e4 LT |
233 | void __init check_bugs32(void) |
234 | { | |
9267a30d | 235 | check_errata(); |
1da177e4 LT |
236 | } |
237 | ||
238 | /* | |
239 | * Probe whether cpu has config register by trying to play with | |
240 | * alternate cache bit and see whether it matters. | |
241 | * It's used by cpu_probe to distinguish between R3000A and R3081. | |
242 | */ | |
243 | static inline int cpu_has_confreg(void) | |
244 | { | |
245 | #ifdef CONFIG_CPU_R3000 | |
246 | extern unsigned long r3k_cache_size(unsigned long); | |
247 | unsigned long size1, size2; | |
248 | unsigned long cfg = read_c0_conf(); | |
249 | ||
250 | size1 = r3k_cache_size(ST0_ISC); | |
251 | write_c0_conf(cfg ^ R30XX_CONF_AC); | |
252 | size2 = r3k_cache_size(ST0_ISC); | |
253 | write_c0_conf(cfg); | |
254 | return size1 != size2; | |
255 | #else | |
256 | return 0; | |
257 | #endif | |
258 | } | |
259 | ||
260 | /* | |
261 | * Get the FPU Implementation/Revision. | |
262 | */ | |
263 | static inline unsigned long cpu_get_fpu_id(void) | |
264 | { | |
265 | unsigned long tmp, fpu_id; | |
266 | ||
267 | tmp = read_c0_status(); | |
268 | __enable_fpu(); | |
269 | fpu_id = read_32bit_cp1_register(CP1_REVISION); | |
270 | write_c0_status(tmp); | |
271 | return fpu_id; | |
272 | } | |
273 | ||
274 | /* | |
275 | * Check the CPU has an FPU the official way. | |
276 | */ | |
277 | static inline int __cpu_has_fpu(void) | |
278 | { | |
279 | return ((cpu_get_fpu_id() & 0xff00) != FPIR_IMP_NONE); | |
280 | } | |
281 | ||
02cf2119 | 282 | #define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \ |
1da177e4 LT |
283 | | MIPS_CPU_COUNTER) |
284 | ||
cea7e2df | 285 | static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 LT |
286 | { |
287 | switch (c->processor_id & 0xff00) { | |
288 | case PRID_IMP_R2000: | |
289 | c->cputype = CPU_R2000; | |
cea7e2df | 290 | __cpu_name[cpu] = "R2000"; |
1da177e4 | 291 | c->isa_level = MIPS_CPU_ISA_I; |
02cf2119 RB |
292 | c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE | |
293 | MIPS_CPU_NOFPUEX; | |
1da177e4 LT |
294 | if (__cpu_has_fpu()) |
295 | c->options |= MIPS_CPU_FPU; | |
296 | c->tlbsize = 64; | |
297 | break; | |
298 | case PRID_IMP_R3000: | |
cea7e2df RB |
299 | if ((c->processor_id & 0xff) == PRID_REV_R3000A) { |
300 | if (cpu_has_confreg()) { | |
1da177e4 | 301 | c->cputype = CPU_R3081E; |
cea7e2df RB |
302 | __cpu_name[cpu] = "R3081"; |
303 | } else { | |
1da177e4 | 304 | c->cputype = CPU_R3000A; |
cea7e2df RB |
305 | __cpu_name[cpu] = "R3000A"; |
306 | } | |
307 | break; | |
308 | } else { | |
1da177e4 | 309 | c->cputype = CPU_R3000; |
cea7e2df RB |
310 | __cpu_name[cpu] = "R3000"; |
311 | } | |
1da177e4 | 312 | c->isa_level = MIPS_CPU_ISA_I; |
02cf2119 RB |
313 | c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE | |
314 | MIPS_CPU_NOFPUEX; | |
1da177e4 LT |
315 | if (__cpu_has_fpu()) |
316 | c->options |= MIPS_CPU_FPU; | |
317 | c->tlbsize = 64; | |
318 | break; | |
319 | case PRID_IMP_R4000: | |
320 | if (read_c0_config() & CONF_SC) { | |
cea7e2df | 321 | if ((c->processor_id & 0xff) >= PRID_REV_R4400) { |
1da177e4 | 322 | c->cputype = CPU_R4400PC; |
cea7e2df RB |
323 | __cpu_name[cpu] = "R4400PC"; |
324 | } else { | |
1da177e4 | 325 | c->cputype = CPU_R4000PC; |
cea7e2df RB |
326 | __cpu_name[cpu] = "R4000PC"; |
327 | } | |
1da177e4 | 328 | } else { |
cea7e2df | 329 | if ((c->processor_id & 0xff) >= PRID_REV_R4400) { |
1da177e4 | 330 | c->cputype = CPU_R4400SC; |
cea7e2df RB |
331 | __cpu_name[cpu] = "R4400SC"; |
332 | } else { | |
1da177e4 | 333 | c->cputype = CPU_R4000SC; |
cea7e2df RB |
334 | __cpu_name[cpu] = "R4000SC"; |
335 | } | |
1da177e4 LT |
336 | } |
337 | ||
338 | c->isa_level = MIPS_CPU_ISA_III; | |
339 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
340 | MIPS_CPU_WATCH | MIPS_CPU_VCE | | |
341 | MIPS_CPU_LLSC; | |
342 | c->tlbsize = 48; | |
343 | break; | |
344 | case PRID_IMP_VR41XX: | |
345 | switch (c->processor_id & 0xf0) { | |
1da177e4 LT |
346 | case PRID_REV_VR4111: |
347 | c->cputype = CPU_VR4111; | |
cea7e2df | 348 | __cpu_name[cpu] = "NEC VR4111"; |
1da177e4 | 349 | break; |
1da177e4 LT |
350 | case PRID_REV_VR4121: |
351 | c->cputype = CPU_VR4121; | |
cea7e2df | 352 | __cpu_name[cpu] = "NEC VR4121"; |
1da177e4 LT |
353 | break; |
354 | case PRID_REV_VR4122: | |
cea7e2df | 355 | if ((c->processor_id & 0xf) < 0x3) { |
1da177e4 | 356 | c->cputype = CPU_VR4122; |
cea7e2df RB |
357 | __cpu_name[cpu] = "NEC VR4122"; |
358 | } else { | |
1da177e4 | 359 | c->cputype = CPU_VR4181A; |
cea7e2df RB |
360 | __cpu_name[cpu] = "NEC VR4181A"; |
361 | } | |
1da177e4 LT |
362 | break; |
363 | case PRID_REV_VR4130: | |
cea7e2df | 364 | if ((c->processor_id & 0xf) < 0x4) { |
1da177e4 | 365 | c->cputype = CPU_VR4131; |
cea7e2df RB |
366 | __cpu_name[cpu] = "NEC VR4131"; |
367 | } else { | |
1da177e4 | 368 | c->cputype = CPU_VR4133; |
cea7e2df RB |
369 | __cpu_name[cpu] = "NEC VR4133"; |
370 | } | |
1da177e4 LT |
371 | break; |
372 | default: | |
373 | printk(KERN_INFO "Unexpected CPU of NEC VR4100 series\n"); | |
374 | c->cputype = CPU_VR41XX; | |
cea7e2df | 375 | __cpu_name[cpu] = "NEC Vr41xx"; |
1da177e4 LT |
376 | break; |
377 | } | |
378 | c->isa_level = MIPS_CPU_ISA_III; | |
379 | c->options = R4K_OPTS; | |
380 | c->tlbsize = 32; | |
381 | break; | |
382 | case PRID_IMP_R4300: | |
383 | c->cputype = CPU_R4300; | |
cea7e2df | 384 | __cpu_name[cpu] = "R4300"; |
1da177e4 LT |
385 | c->isa_level = MIPS_CPU_ISA_III; |
386 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
387 | MIPS_CPU_LLSC; | |
388 | c->tlbsize = 32; | |
389 | break; | |
390 | case PRID_IMP_R4600: | |
391 | c->cputype = CPU_R4600; | |
cea7e2df | 392 | __cpu_name[cpu] = "R4600"; |
1da177e4 | 393 | c->isa_level = MIPS_CPU_ISA_III; |
075e7502 TS |
394 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
395 | MIPS_CPU_LLSC; | |
1da177e4 LT |
396 | c->tlbsize = 48; |
397 | break; | |
398 | #if 0 | |
399 | case PRID_IMP_R4650: | |
400 | /* | |
401 | * This processor doesn't have an MMU, so it's not | |
402 | * "real easy" to run Linux on it. It is left purely | |
403 | * for documentation. Commented out because it shares | |
404 | * it's c0_prid id number with the TX3900. | |
405 | */ | |
a3dddd56 | 406 | c->cputype = CPU_R4650; |
cea7e2df | 407 | __cpu_name[cpu] = "R4650"; |
1da177e4 LT |
408 | c->isa_level = MIPS_CPU_ISA_III; |
409 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_LLSC; | |
410 | c->tlbsize = 48; | |
411 | break; | |
412 | #endif | |
413 | case PRID_IMP_TX39: | |
414 | c->isa_level = MIPS_CPU_ISA_I; | |
02cf2119 | 415 | c->options = MIPS_CPU_TLB | MIPS_CPU_TX39_CACHE; |
1da177e4 LT |
416 | |
417 | if ((c->processor_id & 0xf0) == (PRID_REV_TX3927 & 0xf0)) { | |
418 | c->cputype = CPU_TX3927; | |
cea7e2df | 419 | __cpu_name[cpu] = "TX3927"; |
1da177e4 LT |
420 | c->tlbsize = 64; |
421 | } else { | |
422 | switch (c->processor_id & 0xff) { | |
423 | case PRID_REV_TX3912: | |
424 | c->cputype = CPU_TX3912; | |
cea7e2df | 425 | __cpu_name[cpu] = "TX3912"; |
1da177e4 LT |
426 | c->tlbsize = 32; |
427 | break; | |
428 | case PRID_REV_TX3922: | |
429 | c->cputype = CPU_TX3922; | |
cea7e2df | 430 | __cpu_name[cpu] = "TX3922"; |
1da177e4 LT |
431 | c->tlbsize = 64; |
432 | break; | |
1da177e4 LT |
433 | } |
434 | } | |
435 | break; | |
436 | case PRID_IMP_R4700: | |
437 | c->cputype = CPU_R4700; | |
cea7e2df | 438 | __cpu_name[cpu] = "R4700"; |
1da177e4 LT |
439 | c->isa_level = MIPS_CPU_ISA_III; |
440 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
441 | MIPS_CPU_LLSC; | |
442 | c->tlbsize = 48; | |
443 | break; | |
444 | case PRID_IMP_TX49: | |
445 | c->cputype = CPU_TX49XX; | |
cea7e2df | 446 | __cpu_name[cpu] = "R49XX"; |
1da177e4 LT |
447 | c->isa_level = MIPS_CPU_ISA_III; |
448 | c->options = R4K_OPTS | MIPS_CPU_LLSC; | |
449 | if (!(c->processor_id & 0x08)) | |
450 | c->options |= MIPS_CPU_FPU | MIPS_CPU_32FPR; | |
451 | c->tlbsize = 48; | |
452 | break; | |
453 | case PRID_IMP_R5000: | |
454 | c->cputype = CPU_R5000; | |
cea7e2df | 455 | __cpu_name[cpu] = "R5000"; |
1da177e4 LT |
456 | c->isa_level = MIPS_CPU_ISA_IV; |
457 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
458 | MIPS_CPU_LLSC; | |
459 | c->tlbsize = 48; | |
460 | break; | |
461 | case PRID_IMP_R5432: | |
462 | c->cputype = CPU_R5432; | |
cea7e2df | 463 | __cpu_name[cpu] = "R5432"; |
1da177e4 LT |
464 | c->isa_level = MIPS_CPU_ISA_IV; |
465 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
466 | MIPS_CPU_WATCH | MIPS_CPU_LLSC; | |
467 | c->tlbsize = 48; | |
468 | break; | |
469 | case PRID_IMP_R5500: | |
470 | c->cputype = CPU_R5500; | |
cea7e2df | 471 | __cpu_name[cpu] = "R5500"; |
1da177e4 LT |
472 | c->isa_level = MIPS_CPU_ISA_IV; |
473 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
474 | MIPS_CPU_WATCH | MIPS_CPU_LLSC; | |
475 | c->tlbsize = 48; | |
476 | break; | |
477 | case PRID_IMP_NEVADA: | |
478 | c->cputype = CPU_NEVADA; | |
cea7e2df | 479 | __cpu_name[cpu] = "Nevada"; |
1da177e4 LT |
480 | c->isa_level = MIPS_CPU_ISA_IV; |
481 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
482 | MIPS_CPU_DIVEC | MIPS_CPU_LLSC; | |
483 | c->tlbsize = 48; | |
484 | break; | |
485 | case PRID_IMP_R6000: | |
486 | c->cputype = CPU_R6000; | |
cea7e2df | 487 | __cpu_name[cpu] = "R6000"; |
1da177e4 LT |
488 | c->isa_level = MIPS_CPU_ISA_II; |
489 | c->options = MIPS_CPU_TLB | MIPS_CPU_FPU | | |
490 | MIPS_CPU_LLSC; | |
491 | c->tlbsize = 32; | |
492 | break; | |
493 | case PRID_IMP_R6000A: | |
494 | c->cputype = CPU_R6000A; | |
cea7e2df | 495 | __cpu_name[cpu] = "R6000A"; |
1da177e4 LT |
496 | c->isa_level = MIPS_CPU_ISA_II; |
497 | c->options = MIPS_CPU_TLB | MIPS_CPU_FPU | | |
498 | MIPS_CPU_LLSC; | |
499 | c->tlbsize = 32; | |
500 | break; | |
501 | case PRID_IMP_RM7000: | |
502 | c->cputype = CPU_RM7000; | |
cea7e2df | 503 | __cpu_name[cpu] = "RM7000"; |
1da177e4 LT |
504 | c->isa_level = MIPS_CPU_ISA_IV; |
505 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
506 | MIPS_CPU_LLSC; | |
507 | /* | |
508 | * Undocumented RM7000: Bit 29 in the info register of | |
509 | * the RM7000 v2.0 indicates if the TLB has 48 or 64 | |
510 | * entries. | |
511 | * | |
512 | * 29 1 => 64 entry JTLB | |
513 | * 0 => 48 entry JTLB | |
514 | */ | |
515 | c->tlbsize = (read_c0_info() & (1 << 29)) ? 64 : 48; | |
516 | break; | |
517 | case PRID_IMP_RM9000: | |
518 | c->cputype = CPU_RM9000; | |
cea7e2df | 519 | __cpu_name[cpu] = "RM9000"; |
1da177e4 LT |
520 | c->isa_level = MIPS_CPU_ISA_IV; |
521 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
522 | MIPS_CPU_LLSC; | |
523 | /* | |
524 | * Bit 29 in the info register of the RM9000 | |
525 | * indicates if the TLB has 48 or 64 entries. | |
526 | * | |
527 | * 29 1 => 64 entry JTLB | |
528 | * 0 => 48 entry JTLB | |
529 | */ | |
530 | c->tlbsize = (read_c0_info() & (1 << 29)) ? 64 : 48; | |
531 | break; | |
532 | case PRID_IMP_R8000: | |
533 | c->cputype = CPU_R8000; | |
cea7e2df | 534 | __cpu_name[cpu] = "RM8000"; |
1da177e4 LT |
535 | c->isa_level = MIPS_CPU_ISA_IV; |
536 | c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX | | |
537 | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
538 | MIPS_CPU_LLSC; | |
539 | c->tlbsize = 384; /* has weird TLB: 3-way x 128 */ | |
540 | break; | |
541 | case PRID_IMP_R10000: | |
542 | c->cputype = CPU_R10000; | |
cea7e2df | 543 | __cpu_name[cpu] = "R10000"; |
1da177e4 | 544 | c->isa_level = MIPS_CPU_ISA_IV; |
8b36612a | 545 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | |
1da177e4 LT |
546 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
547 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | | |
548 | MIPS_CPU_LLSC; | |
549 | c->tlbsize = 64; | |
550 | break; | |
551 | case PRID_IMP_R12000: | |
552 | c->cputype = CPU_R12000; | |
cea7e2df | 553 | __cpu_name[cpu] = "R12000"; |
1da177e4 | 554 | c->isa_level = MIPS_CPU_ISA_IV; |
8b36612a | 555 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | |
1da177e4 LT |
556 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
557 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | | |
558 | MIPS_CPU_LLSC; | |
559 | c->tlbsize = 64; | |
560 | break; | |
44d921b2 K |
561 | case PRID_IMP_R14000: |
562 | c->cputype = CPU_R14000; | |
cea7e2df | 563 | __cpu_name[cpu] = "R14000"; |
44d921b2 K |
564 | c->isa_level = MIPS_CPU_ISA_IV; |
565 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | | |
566 | MIPS_CPU_FPU | MIPS_CPU_32FPR | | |
567 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | | |
568 | MIPS_CPU_LLSC; | |
569 | c->tlbsize = 64; | |
570 | break; | |
2a21c730 FZ |
571 | case PRID_IMP_LOONGSON2: |
572 | c->cputype = CPU_LOONGSON2; | |
cea7e2df | 573 | __cpu_name[cpu] = "ICT Loongson-2"; |
2a21c730 FZ |
574 | c->isa_level = MIPS_CPU_ISA_III; |
575 | c->options = R4K_OPTS | | |
576 | MIPS_CPU_FPU | MIPS_CPU_LLSC | | |
577 | MIPS_CPU_32FPR; | |
578 | c->tlbsize = 64; | |
579 | break; | |
1da177e4 LT |
580 | } |
581 | } | |
582 | ||
234fcd14 | 583 | static char unknown_isa[] __cpuinitdata = KERN_ERR \ |
b4672d37 RB |
584 | "Unsupported ISA type, c0.config0: %d."; |
585 | ||
4194318c | 586 | static inline unsigned int decode_config0(struct cpuinfo_mips *c) |
1da177e4 | 587 | { |
4194318c RB |
588 | unsigned int config0; |
589 | int isa; | |
1da177e4 | 590 | |
4194318c RB |
591 | config0 = read_c0_config(); |
592 | ||
593 | if (((config0 & MIPS_CONF_MT) >> 7) == 1) | |
02cf2119 | 594 | c->options |= MIPS_CPU_TLB; |
4194318c RB |
595 | isa = (config0 & MIPS_CONF_AT) >> 13; |
596 | switch (isa) { | |
597 | case 0: | |
3a01c49a | 598 | switch ((config0 & MIPS_CONF_AR) >> 10) { |
b4672d37 RB |
599 | case 0: |
600 | c->isa_level = MIPS_CPU_ISA_M32R1; | |
601 | break; | |
602 | case 1: | |
603 | c->isa_level = MIPS_CPU_ISA_M32R2; | |
604 | break; | |
605 | default: | |
606 | goto unknown; | |
607 | } | |
4194318c RB |
608 | break; |
609 | case 2: | |
3a01c49a | 610 | switch ((config0 & MIPS_CONF_AR) >> 10) { |
b4672d37 RB |
611 | case 0: |
612 | c->isa_level = MIPS_CPU_ISA_M64R1; | |
613 | break; | |
614 | case 1: | |
615 | c->isa_level = MIPS_CPU_ISA_M64R2; | |
616 | break; | |
617 | default: | |
618 | goto unknown; | |
619 | } | |
4194318c RB |
620 | break; |
621 | default: | |
b4672d37 | 622 | goto unknown; |
4194318c RB |
623 | } |
624 | ||
625 | return config0 & MIPS_CONF_M; | |
b4672d37 RB |
626 | |
627 | unknown: | |
628 | panic(unknown_isa, config0); | |
4194318c RB |
629 | } |
630 | ||
631 | static inline unsigned int decode_config1(struct cpuinfo_mips *c) | |
632 | { | |
633 | unsigned int config1; | |
1da177e4 | 634 | |
1da177e4 | 635 | config1 = read_c0_config1(); |
4194318c RB |
636 | |
637 | if (config1 & MIPS_CONF1_MD) | |
638 | c->ases |= MIPS_ASE_MDMX; | |
639 | if (config1 & MIPS_CONF1_WR) | |
1da177e4 | 640 | c->options |= MIPS_CPU_WATCH; |
4194318c RB |
641 | if (config1 & MIPS_CONF1_CA) |
642 | c->ases |= MIPS_ASE_MIPS16; | |
643 | if (config1 & MIPS_CONF1_EP) | |
1da177e4 | 644 | c->options |= MIPS_CPU_EJTAG; |
4194318c | 645 | if (config1 & MIPS_CONF1_FP) { |
1da177e4 LT |
646 | c->options |= MIPS_CPU_FPU; |
647 | c->options |= MIPS_CPU_32FPR; | |
648 | } | |
4194318c RB |
649 | if (cpu_has_tlb) |
650 | c->tlbsize = ((config1 & MIPS_CONF1_TLBS) >> 25) + 1; | |
651 | ||
652 | return config1 & MIPS_CONF_M; | |
653 | } | |
654 | ||
655 | static inline unsigned int decode_config2(struct cpuinfo_mips *c) | |
656 | { | |
657 | unsigned int config2; | |
658 | ||
659 | config2 = read_c0_config2(); | |
660 | ||
661 | if (config2 & MIPS_CONF2_SL) | |
662 | c->scache.flags &= ~MIPS_CACHE_NOT_PRESENT; | |
663 | ||
664 | return config2 & MIPS_CONF_M; | |
665 | } | |
666 | ||
667 | static inline unsigned int decode_config3(struct cpuinfo_mips *c) | |
668 | { | |
669 | unsigned int config3; | |
670 | ||
671 | config3 = read_c0_config3(); | |
672 | ||
673 | if (config3 & MIPS_CONF3_SM) | |
674 | c->ases |= MIPS_ASE_SMARTMIPS; | |
e50c0a8f RB |
675 | if (config3 & MIPS_CONF3_DSP) |
676 | c->ases |= MIPS_ASE_DSP; | |
8f40611d RB |
677 | if (config3 & MIPS_CONF3_VINT) |
678 | c->options |= MIPS_CPU_VINT; | |
679 | if (config3 & MIPS_CONF3_VEIC) | |
680 | c->options |= MIPS_CPU_VEIC; | |
681 | if (config3 & MIPS_CONF3_MT) | |
e0daad44 | 682 | c->ases |= MIPS_ASE_MIPSMT; |
a3692020 RB |
683 | if (config3 & MIPS_CONF3_ULRI) |
684 | c->options |= MIPS_CPU_ULRI; | |
4194318c RB |
685 | |
686 | return config3 & MIPS_CONF_M; | |
687 | } | |
688 | ||
234fcd14 | 689 | static void __cpuinit decode_configs(struct cpuinfo_mips *c) |
4194318c | 690 | { |
558ce124 RB |
691 | int ok; |
692 | ||
4194318c | 693 | /* MIPS32 or MIPS64 compliant CPU. */ |
02cf2119 RB |
694 | c->options = MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE | MIPS_CPU_COUNTER | |
695 | MIPS_CPU_DIVEC | MIPS_CPU_LLSC | MIPS_CPU_MCHECK; | |
4194318c | 696 | |
1da177e4 LT |
697 | c->scache.flags = MIPS_CACHE_NOT_PRESENT; |
698 | ||
558ce124 RB |
699 | ok = decode_config0(c); /* Read Config registers. */ |
700 | BUG_ON(!ok); /* Arch spec violation! */ | |
701 | if (ok) | |
702 | ok = decode_config1(c); | |
703 | if (ok) | |
704 | ok = decode_config2(c); | |
705 | if (ok) | |
706 | ok = decode_config3(c); | |
707 | ||
708 | mips_probe_watch_registers(c); | |
1da177e4 LT |
709 | } |
710 | ||
0b6d497f CD |
711 | #ifdef CONFIG_CPU_MIPSR2 |
712 | extern void spram_config(void); | |
713 | #else | |
714 | static inline void spram_config(void) {} | |
715 | #endif | |
716 | ||
cea7e2df | 717 | static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 718 | { |
4194318c | 719 | decode_configs(c); |
1da177e4 LT |
720 | switch (c->processor_id & 0xff00) { |
721 | case PRID_IMP_4KC: | |
722 | c->cputype = CPU_4KC; | |
cea7e2df | 723 | __cpu_name[cpu] = "MIPS 4Kc"; |
1da177e4 LT |
724 | break; |
725 | case PRID_IMP_4KEC: | |
726 | c->cputype = CPU_4KEC; | |
cea7e2df | 727 | __cpu_name[cpu] = "MIPS 4KEc"; |
1da177e4 | 728 | break; |
2b07bd02 RB |
729 | case PRID_IMP_4KECR2: |
730 | c->cputype = CPU_4KEC; | |
cea7e2df | 731 | __cpu_name[cpu] = "MIPS 4KEc"; |
2b07bd02 | 732 | break; |
1da177e4 | 733 | case PRID_IMP_4KSC: |
8afcb5d8 | 734 | case PRID_IMP_4KSD: |
1da177e4 | 735 | c->cputype = CPU_4KSC; |
cea7e2df | 736 | __cpu_name[cpu] = "MIPS 4KSc"; |
1da177e4 LT |
737 | break; |
738 | case PRID_IMP_5KC: | |
739 | c->cputype = CPU_5KC; | |
cea7e2df | 740 | __cpu_name[cpu] = "MIPS 5Kc"; |
1da177e4 LT |
741 | break; |
742 | case PRID_IMP_20KC: | |
743 | c->cputype = CPU_20KC; | |
cea7e2df | 744 | __cpu_name[cpu] = "MIPS 20Kc"; |
1da177e4 LT |
745 | break; |
746 | case PRID_IMP_24K: | |
e50c0a8f | 747 | case PRID_IMP_24KE: |
1da177e4 | 748 | c->cputype = CPU_24K; |
cea7e2df | 749 | __cpu_name[cpu] = "MIPS 24Kc"; |
1da177e4 LT |
750 | break; |
751 | case PRID_IMP_25KF: | |
752 | c->cputype = CPU_25KF; | |
cea7e2df | 753 | __cpu_name[cpu] = "MIPS 25Kc"; |
1da177e4 | 754 | break; |
bbc7f22f RB |
755 | case PRID_IMP_34K: |
756 | c->cputype = CPU_34K; | |
cea7e2df | 757 | __cpu_name[cpu] = "MIPS 34Kc"; |
bbc7f22f | 758 | break; |
c620953c CD |
759 | case PRID_IMP_74K: |
760 | c->cputype = CPU_74K; | |
cea7e2df | 761 | __cpu_name[cpu] = "MIPS 74Kc"; |
c620953c | 762 | break; |
39b8d525 RB |
763 | case PRID_IMP_1004K: |
764 | c->cputype = CPU_1004K; | |
cea7e2df | 765 | __cpu_name[cpu] = "MIPS 1004Kc"; |
39b8d525 | 766 | break; |
1da177e4 | 767 | } |
0b6d497f CD |
768 | |
769 | spram_config(); | |
1da177e4 LT |
770 | } |
771 | ||
cea7e2df | 772 | static inline void cpu_probe_alchemy(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 773 | { |
4194318c | 774 | decode_configs(c); |
1da177e4 LT |
775 | switch (c->processor_id & 0xff00) { |
776 | case PRID_IMP_AU1_REV1: | |
777 | case PRID_IMP_AU1_REV2: | |
270717a8 | 778 | c->cputype = CPU_ALCHEMY; |
1da177e4 LT |
779 | switch ((c->processor_id >> 24) & 0xff) { |
780 | case 0: | |
cea7e2df | 781 | __cpu_name[cpu] = "Au1000"; |
1da177e4 LT |
782 | break; |
783 | case 1: | |
cea7e2df | 784 | __cpu_name[cpu] = "Au1500"; |
1da177e4 LT |
785 | break; |
786 | case 2: | |
cea7e2df | 787 | __cpu_name[cpu] = "Au1100"; |
1da177e4 LT |
788 | break; |
789 | case 3: | |
cea7e2df | 790 | __cpu_name[cpu] = "Au1550"; |
1da177e4 | 791 | break; |
e3ad1c23 | 792 | case 4: |
cea7e2df | 793 | __cpu_name[cpu] = "Au1200"; |
270717a8 | 794 | if ((c->processor_id & 0xff) == 2) |
cea7e2df | 795 | __cpu_name[cpu] = "Au1250"; |
237cfee1 ML |
796 | break; |
797 | case 5: | |
cea7e2df | 798 | __cpu_name[cpu] = "Au1210"; |
e3ad1c23 | 799 | break; |
1da177e4 | 800 | default: |
270717a8 | 801 | __cpu_name[cpu] = "Au1xxx"; |
1da177e4 LT |
802 | break; |
803 | } | |
1da177e4 LT |
804 | break; |
805 | } | |
806 | } | |
807 | ||
cea7e2df | 808 | static inline void cpu_probe_sibyte(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 809 | { |
4194318c | 810 | decode_configs(c); |
02cf2119 | 811 | |
1da177e4 LT |
812 | switch (c->processor_id & 0xff00) { |
813 | case PRID_IMP_SB1: | |
814 | c->cputype = CPU_SB1; | |
cea7e2df | 815 | __cpu_name[cpu] = "SiByte SB1"; |
1da177e4 | 816 | /* FPU in pass1 is known to have issues. */ |
aa32374a | 817 | if ((c->processor_id & 0xff) < 0x02) |
010b853b | 818 | c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR); |
1da177e4 | 819 | break; |
93ce2f52 AI |
820 | case PRID_IMP_SB1A: |
821 | c->cputype = CPU_SB1A; | |
cea7e2df | 822 | __cpu_name[cpu] = "SiByte SB1A"; |
93ce2f52 | 823 | break; |
1da177e4 LT |
824 | } |
825 | } | |
826 | ||
cea7e2df | 827 | static inline void cpu_probe_sandcraft(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 828 | { |
4194318c | 829 | decode_configs(c); |
1da177e4 LT |
830 | switch (c->processor_id & 0xff00) { |
831 | case PRID_IMP_SR71000: | |
832 | c->cputype = CPU_SR71000; | |
cea7e2df | 833 | __cpu_name[cpu] = "Sandcraft SR71000"; |
1da177e4 LT |
834 | c->scache.ways = 8; |
835 | c->tlbsize = 64; | |
836 | break; | |
837 | } | |
838 | } | |
839 | ||
cea7e2df | 840 | static inline void cpu_probe_nxp(struct cpuinfo_mips *c, unsigned int cpu) |
bdf21b18 PP |
841 | { |
842 | decode_configs(c); | |
843 | switch (c->processor_id & 0xff00) { | |
844 | case PRID_IMP_PR4450: | |
845 | c->cputype = CPU_PR4450; | |
cea7e2df | 846 | __cpu_name[cpu] = "Philips PR4450"; |
e7958bb9 | 847 | c->isa_level = MIPS_CPU_ISA_M32R1; |
bdf21b18 | 848 | break; |
bdf21b18 PP |
849 | } |
850 | } | |
851 | ||
cea7e2df | 852 | static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu) |
1c0c13eb AJ |
853 | { |
854 | decode_configs(c); | |
855 | switch (c->processor_id & 0xff00) { | |
856 | case PRID_IMP_BCM3302: | |
857 | c->cputype = CPU_BCM3302; | |
cea7e2df | 858 | __cpu_name[cpu] = "Broadcom BCM3302"; |
1c0c13eb AJ |
859 | break; |
860 | case PRID_IMP_BCM4710: | |
861 | c->cputype = CPU_BCM4710; | |
cea7e2df | 862 | __cpu_name[cpu] = "Broadcom BCM4710"; |
1c0c13eb AJ |
863 | break; |
864 | } | |
865 | } | |
866 | ||
0dd4781b DD |
867 | static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu) |
868 | { | |
869 | decode_configs(c); | |
870 | switch (c->processor_id & 0xff00) { | |
871 | case PRID_IMP_CAVIUM_CN38XX: | |
872 | case PRID_IMP_CAVIUM_CN31XX: | |
873 | case PRID_IMP_CAVIUM_CN30XX: | |
874 | case PRID_IMP_CAVIUM_CN58XX: | |
875 | case PRID_IMP_CAVIUM_CN56XX: | |
876 | case PRID_IMP_CAVIUM_CN50XX: | |
877 | case PRID_IMP_CAVIUM_CN52XX: | |
878 | c->cputype = CPU_CAVIUM_OCTEON; | |
879 | __cpu_name[cpu] = "Cavium Octeon"; | |
880 | break; | |
881 | default: | |
882 | printk(KERN_INFO "Unknown Octeon chip!\n"); | |
883 | c->cputype = CPU_UNKNOWN; | |
884 | break; | |
885 | } | |
886 | } | |
887 | ||
9966db25 RB |
888 | const char *__cpu_name[NR_CPUS]; |
889 | ||
234fcd14 | 890 | __cpuinit void cpu_probe(void) |
1da177e4 LT |
891 | { |
892 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
9966db25 | 893 | unsigned int cpu = smp_processor_id(); |
1da177e4 LT |
894 | |
895 | c->processor_id = PRID_IMP_UNKNOWN; | |
896 | c->fpu_id = FPIR_IMP_NONE; | |
897 | c->cputype = CPU_UNKNOWN; | |
898 | ||
899 | c->processor_id = read_c0_prid(); | |
900 | switch (c->processor_id & 0xff0000) { | |
901 | case PRID_COMP_LEGACY: | |
cea7e2df | 902 | cpu_probe_legacy(c, cpu); |
1da177e4 LT |
903 | break; |
904 | case PRID_COMP_MIPS: | |
cea7e2df | 905 | cpu_probe_mips(c, cpu); |
1da177e4 LT |
906 | break; |
907 | case PRID_COMP_ALCHEMY: | |
cea7e2df | 908 | cpu_probe_alchemy(c, cpu); |
1da177e4 LT |
909 | break; |
910 | case PRID_COMP_SIBYTE: | |
cea7e2df | 911 | cpu_probe_sibyte(c, cpu); |
1da177e4 | 912 | break; |
1c0c13eb | 913 | case PRID_COMP_BROADCOM: |
cea7e2df | 914 | cpu_probe_broadcom(c, cpu); |
1c0c13eb | 915 | break; |
1da177e4 | 916 | case PRID_COMP_SANDCRAFT: |
cea7e2df | 917 | cpu_probe_sandcraft(c, cpu); |
1da177e4 | 918 | break; |
a92b0588 | 919 | case PRID_COMP_NXP: |
cea7e2df | 920 | cpu_probe_nxp(c, cpu); |
a3dddd56 | 921 | break; |
0dd4781b DD |
922 | case PRID_COMP_CAVIUM: |
923 | cpu_probe_cavium(c, cpu); | |
924 | break; | |
1da177e4 | 925 | } |
dec8b1ca | 926 | |
cea7e2df RB |
927 | BUG_ON(!__cpu_name[cpu]); |
928 | BUG_ON(c->cputype == CPU_UNKNOWN); | |
929 | ||
dec8b1ca FBH |
930 | /* |
931 | * Platform code can force the cpu type to optimize code | |
932 | * generation. In that case be sure the cpu type is correctly | |
933 | * manually setup otherwise it could trigger some nasty bugs. | |
934 | */ | |
935 | BUG_ON(current_cpu_type() != c->cputype); | |
936 | ||
4194318c | 937 | if (c->options & MIPS_CPU_FPU) { |
1da177e4 | 938 | c->fpu_id = cpu_get_fpu_id(); |
4194318c | 939 | |
e7958bb9 | 940 | if (c->isa_level == MIPS_CPU_ISA_M32R1 || |
b4672d37 RB |
941 | c->isa_level == MIPS_CPU_ISA_M32R2 || |
942 | c->isa_level == MIPS_CPU_ISA_M64R1 || | |
943 | c->isa_level == MIPS_CPU_ISA_M64R2) { | |
4194318c RB |
944 | if (c->fpu_id & MIPS_FPIR_3D) |
945 | c->ases |= MIPS_ASE_MIPS3D; | |
946 | } | |
947 | } | |
9966db25 | 948 | |
f6771dbb RB |
949 | if (cpu_has_mips_r2) |
950 | c->srsets = ((read_c0_srsctl() >> 26) & 0x0f) + 1; | |
951 | else | |
952 | c->srsets = 1; | |
1da177e4 LT |
953 | } |
954 | ||
234fcd14 | 955 | __cpuinit void cpu_report(void) |
1da177e4 LT |
956 | { |
957 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
958 | ||
9966db25 RB |
959 | printk(KERN_INFO "CPU revision is: %08x (%s)\n", |
960 | c->processor_id, cpu_name_string()); | |
1da177e4 | 961 | if (c->options & MIPS_CPU_FPU) |
9966db25 | 962 | printk(KERN_INFO "FPU revision is: %08x\n", c->fpu_id); |
1da177e4 | 963 | } |