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Linux 3.15-rc1
[linux/fpc-iii.git] / arch / mips / kernel / cpu-probe.c
blob6e8fb85ce7c3b076fd6bec6b2b770ed3b425c597
1 /*
2 * Processor capabilities determination functions.
3 *
4 * Copyright (C) xxxx the Anonymous
5 * Copyright (C) 1994 - 2006 Ralf Baechle
6 * Copyright (C) 2003, 2004 Maciej W. Rozycki
7 * Copyright (C) 2001, 2004, 2011, 2012 MIPS Technologies, Inc.
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 */
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/ptrace.h>
17 #include <linux/smp.h>
18 #include <linux/stddef.h>
19 #include <linux/export.h>
20
21 #include <asm/bugs.h>
22 #include <asm/cpu.h>
23 #include <asm/cpu-type.h>
24 #include <asm/fpu.h>
25 #include <asm/mipsregs.h>
26 #include <asm/mipsmtregs.h>
27 #include <asm/msa.h>
28 #include <asm/watch.h>
29 #include <asm/elf.h>
30 #include <asm/spram.h>
31 #include <asm/uaccess.h>
32
33 static int mips_fpu_disabled;
34
35 static int __init fpu_disable(char *s)
36 {
37 cpu_data[0].options &= ~MIPS_CPU_FPU;
38 mips_fpu_disabled = 1;
39
40 return 1;
41 }
42
43 __setup("nofpu", fpu_disable);
44
45 int mips_dsp_disabled;
46
47 static int __init dsp_disable(char *s)
48 {
49 cpu_data[0].ases &= ~(MIPS_ASE_DSP | MIPS_ASE_DSP2P);
50 mips_dsp_disabled = 1;
51
52 return 1;
53 }
54
55 __setup("nodsp", dsp_disable);
56
57 static inline void check_errata(void)
58 {
59 struct cpuinfo_mips *c = &current_cpu_data;
60
61 switch (current_cpu_type()) {
62 case CPU_34K:
63 /*
64 * Erratum "RPS May Cause Incorrect Instruction Execution"
65 * This code only handles VPE0, any SMP/SMTC/RTOS code
66 * making use of VPE1 will be responsable for that VPE.
67 */
68 if ((c->processor_id & PRID_REV_MASK) <= PRID_REV_34K_V1_0_2)
69 write_c0_config7(read_c0_config7() | MIPS_CONF7_RPS);
70 break;
71 default:
72 break;
73 }
74 }
75
76 void __init check_bugs32(void)
77 {
78 check_errata();
79 }
80
81 /*
82 * Probe whether cpu has config register by trying to play with
83 * alternate cache bit and see whether it matters.
84 * It's used by cpu_probe to distinguish between R3000A and R3081.
85 */
86 static inline int cpu_has_confreg(void)
87 {
88 #ifdef CONFIG_CPU_R3000
89 extern unsigned long r3k_cache_size(unsigned long);
90 unsigned long size1, size2;
91 unsigned long cfg = read_c0_conf();
92
93 size1 = r3k_cache_size(ST0_ISC);
94 write_c0_conf(cfg ^ R30XX_CONF_AC);
95 size2 = r3k_cache_size(ST0_ISC);
96 write_c0_conf(cfg);
97 return size1 != size2;
98 #else
99 return 0;
100 #endif
101 }
102
103 static inline void set_elf_platform(int cpu, const char *plat)
104 {
105 if (cpu == 0)
106 __elf_platform = plat;
107 }
108
109 /*
110 * Get the FPU Implementation/Revision.
111 */
112 static inline unsigned long cpu_get_fpu_id(void)
113 {
114 unsigned long tmp, fpu_id;
115
116 tmp = read_c0_status();
117 __enable_fpu(FPU_AS_IS);
118 fpu_id = read_32bit_cp1_register(CP1_REVISION);
119 write_c0_status(tmp);
120 return fpu_id;
121 }
122
123 /*
124 * Check the CPU has an FPU the official way.
125 */
126 static inline int __cpu_has_fpu(void)
127 {
128 return ((cpu_get_fpu_id() & FPIR_IMP_MASK) != FPIR_IMP_NONE);
129 }
130
131 static inline unsigned long cpu_get_msa_id(void)
132 {
133 unsigned long status, conf5, msa_id;
134
135 status = read_c0_status();
136 __enable_fpu(FPU_64BIT);
137 conf5 = read_c0_config5();
138 enable_msa();
139 msa_id = read_msa_ir();
140 write_c0_config5(conf5);
141 write_c0_status(status);
142 return msa_id;
143 }
144
145 static inline void cpu_probe_vmbits(struct cpuinfo_mips *c)
146 {
147 #ifdef __NEED_VMBITS_PROBE
148 write_c0_entryhi(0x3fffffffffffe000ULL);
149 back_to_back_c0_hazard();
150 c->vmbits = fls64(read_c0_entryhi() & 0x3fffffffffffe000ULL);
151 #endif
152 }
153
154 static void set_isa(struct cpuinfo_mips *c, unsigned int isa)
155 {
156 switch (isa) {
157 case MIPS_CPU_ISA_M64R2:
158 c->isa_level |= MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M64R2;
159 case MIPS_CPU_ISA_M64R1:
160 c->isa_level |= MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M64R1;
161 case MIPS_CPU_ISA_V:
162 c->isa_level |= MIPS_CPU_ISA_V;
163 case MIPS_CPU_ISA_IV:
164 c->isa_level |= MIPS_CPU_ISA_IV;
165 case MIPS_CPU_ISA_III:
166 c->isa_level |= MIPS_CPU_ISA_II | MIPS_CPU_ISA_III;
167 break;
168
169 case MIPS_CPU_ISA_M32R2:
170 c->isa_level |= MIPS_CPU_ISA_M32R2;
171 case MIPS_CPU_ISA_M32R1:
172 c->isa_level |= MIPS_CPU_ISA_M32R1;
173 case MIPS_CPU_ISA_II:
174 c->isa_level |= MIPS_CPU_ISA_II;
175 break;
176 }
177 }
178
179 static char unknown_isa[] = KERN_ERR \
180 "Unsupported ISA type, c0.config0: %d.";
181
182 static void set_ftlb_enable(struct cpuinfo_mips *c, int enable)
183 {
184 unsigned int config6;
185
186 /* It's implementation dependent how the FTLB can be enabled */
187 switch (c->cputype) {
188 case CPU_PROAPTIV:
189 case CPU_P5600:
190 /* proAptiv & related cores use Config6 to enable the FTLB */
191 config6 = read_c0_config6();
192 if (enable)
193 /* Enable FTLB */
194 write_c0_config6(config6 | MIPS_CONF6_FTLBEN);
195 else
196 /* Disable FTLB */
197 write_c0_config6(config6 & ~MIPS_CONF6_FTLBEN);
198 back_to_back_c0_hazard();
199 break;
200 }
201 }
202
203 static inline unsigned int decode_config0(struct cpuinfo_mips *c)
204 {
205 unsigned int config0;
206 int isa;
207
208 config0 = read_c0_config();
209
210 /*
211 * Look for Standard TLB or Dual VTLB and FTLB
212 */
213 if ((((config0 & MIPS_CONF_MT) >> 7) == 1) ||
214 (((config0 & MIPS_CONF_MT) >> 7) == 4))
215 c->options |= MIPS_CPU_TLB;
216
217 isa = (config0 & MIPS_CONF_AT) >> 13;
218 switch (isa) {
219 case 0:
220 switch ((config0 & MIPS_CONF_AR) >> 10) {
221 case 0:
222 set_isa(c, MIPS_CPU_ISA_M32R1);
223 break;
224 case 1:
225 set_isa(c, MIPS_CPU_ISA_M32R2);
226 break;
227 default:
228 goto unknown;
229 }
230 break;
231 case 2:
232 switch ((config0 & MIPS_CONF_AR) >> 10) {
233 case 0:
234 set_isa(c, MIPS_CPU_ISA_M64R1);
235 break;
236 case 1:
237 set_isa(c, MIPS_CPU_ISA_M64R2);
238 break;
239 default:
240 goto unknown;
241 }
242 break;
243 default:
244 goto unknown;
245 }
246
247 return config0 & MIPS_CONF_M;
248
249 unknown:
250 panic(unknown_isa, config0);
251 }
252
253 static inline unsigned int decode_config1(struct cpuinfo_mips *c)
254 {
255 unsigned int config1;
256
257 config1 = read_c0_config1();
258
259 if (config1 & MIPS_CONF1_MD)
260 c->ases |= MIPS_ASE_MDMX;
261 if (config1 & MIPS_CONF1_WR)
262 c->options |= MIPS_CPU_WATCH;
263 if (config1 & MIPS_CONF1_CA)
264 c->ases |= MIPS_ASE_MIPS16;
265 if (config1 & MIPS_CONF1_EP)
266 c->options |= MIPS_CPU_EJTAG;
267 if (config1 & MIPS_CONF1_FP) {
268 c->options |= MIPS_CPU_FPU;
269 c->options |= MIPS_CPU_32FPR;
270 }
271 if (cpu_has_tlb) {
272 c->tlbsize = ((config1 & MIPS_CONF1_TLBS) >> 25) + 1;
273 c->tlbsizevtlb = c->tlbsize;
274 c->tlbsizeftlbsets = 0;
275 }
276
277 return config1 & MIPS_CONF_M;
278 }
279
280 static inline unsigned int decode_config2(struct cpuinfo_mips *c)
281 {
282 unsigned int config2;
283
284 config2 = read_c0_config2();
285
286 if (config2 & MIPS_CONF2_SL)
287 c->scache.flags &= ~MIPS_CACHE_NOT_PRESENT;
288
289 return config2 & MIPS_CONF_M;
290 }
291
292 static inline unsigned int decode_config3(struct cpuinfo_mips *c)
293 {
294 unsigned int config3;
295
296 config3 = read_c0_config3();
297
298 if (config3 & MIPS_CONF3_SM) {
299 c->ases |= MIPS_ASE_SMARTMIPS;
300 c->options |= MIPS_CPU_RIXI;
301 }
302 if (config3 & MIPS_CONF3_RXI)
303 c->options |= MIPS_CPU_RIXI;
304 if (config3 & MIPS_CONF3_DSP)
305 c->ases |= MIPS_ASE_DSP;
306 if (config3 & MIPS_CONF3_DSP2P)
307 c->ases |= MIPS_ASE_DSP2P;
308 if (config3 & MIPS_CONF3_VINT)
309 c->options |= MIPS_CPU_VINT;
310 if (config3 & MIPS_CONF3_VEIC)
311 c->options |= MIPS_CPU_VEIC;
312 if (config3 & MIPS_CONF3_MT)
313 c->ases |= MIPS_ASE_MIPSMT;
314 if (config3 & MIPS_CONF3_ULRI)
315 c->options |= MIPS_CPU_ULRI;
316 if (config3 & MIPS_CONF3_ISA)
317 c->options |= MIPS_CPU_MICROMIPS;
318 if (config3 & MIPS_CONF3_VZ)
319 c->ases |= MIPS_ASE_VZ;
320 if (config3 & MIPS_CONF3_SC)
321 c->options |= MIPS_CPU_SEGMENTS;
322 if (config3 & MIPS_CONF3_MSA)
323 c->ases |= MIPS_ASE_MSA;
324
325 return config3 & MIPS_CONF_M;
326 }
327
328 static inline unsigned int decode_config4(struct cpuinfo_mips *c)
329 {
330 unsigned int config4;
331 unsigned int newcf4;
332 unsigned int mmuextdef;
333 unsigned int ftlb_page = MIPS_CONF4_FTLBPAGESIZE;
334
335 config4 = read_c0_config4();
336
337 if (cpu_has_tlb) {
338 if (((config4 & MIPS_CONF4_IE) >> 29) == 2)
339 c->options |= MIPS_CPU_TLBINV;
340 mmuextdef = config4 & MIPS_CONF4_MMUEXTDEF;
341 switch (mmuextdef) {
342 case MIPS_CONF4_MMUEXTDEF_MMUSIZEEXT:
343 c->tlbsize += (config4 & MIPS_CONF4_MMUSIZEEXT) * 0x40;
344 c->tlbsizevtlb = c->tlbsize;
345 break;
346 case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT:
347 c->tlbsizevtlb +=
348 ((config4 & MIPS_CONF4_VTLBSIZEEXT) >>
349 MIPS_CONF4_VTLBSIZEEXT_SHIFT) * 0x40;
350 c->tlbsize = c->tlbsizevtlb;
351 ftlb_page = MIPS_CONF4_VFTLBPAGESIZE;
352 /* fall through */
353 case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT:
354 newcf4 = (config4 & ~ftlb_page) |
355 (page_size_ftlb(mmuextdef) <<
356 MIPS_CONF4_FTLBPAGESIZE_SHIFT);
357 write_c0_config4(newcf4);
358 back_to_back_c0_hazard();
359 config4 = read_c0_config4();
360 if (config4 != newcf4) {
361 pr_err("PAGE_SIZE 0x%lx is not supported by FTLB (config4=0x%x)\n",
362 PAGE_SIZE, config4);
363 /* Switch FTLB off */
364 set_ftlb_enable(c, 0);
365 break;
366 }
367 c->tlbsizeftlbsets = 1 <<
368 ((config4 & MIPS_CONF4_FTLBSETS) >>
369 MIPS_CONF4_FTLBSETS_SHIFT);
370 c->tlbsizeftlbways = ((config4 & MIPS_CONF4_FTLBWAYS) >>
371 MIPS_CONF4_FTLBWAYS_SHIFT) + 2;
372 c->tlbsize += c->tlbsizeftlbways * c->tlbsizeftlbsets;
373 break;
374 }
375 }
376
377 c->kscratch_mask = (config4 >> 16) & 0xff;
378
379 return config4 & MIPS_CONF_M;
380 }
381
382 static inline unsigned int decode_config5(struct cpuinfo_mips *c)
383 {
384 unsigned int config5;
385
386 config5 = read_c0_config5();
387 config5 &= ~MIPS_CONF5_UFR;
388 write_c0_config5(config5);
389
390 if (config5 & MIPS_CONF5_EVA)
391 c->options |= MIPS_CPU_EVA;
392
393 return config5 & MIPS_CONF_M;
394 }
395
396 static void decode_configs(struct cpuinfo_mips *c)
397 {
398 int ok;
399
400 /* MIPS32 or MIPS64 compliant CPU. */
401 c->options = MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE | MIPS_CPU_COUNTER |
402 MIPS_CPU_DIVEC | MIPS_CPU_LLSC | MIPS_CPU_MCHECK;
403
404 c->scache.flags = MIPS_CACHE_NOT_PRESENT;
405
406 /* Enable FTLB if present */
407 set_ftlb_enable(c, 1);
408
409 ok = decode_config0(c); /* Read Config registers. */
410 BUG_ON(!ok); /* Arch spec violation! */
411 if (ok)
412 ok = decode_config1(c);
413 if (ok)
414 ok = decode_config2(c);
415 if (ok)
416 ok = decode_config3(c);
417 if (ok)
418 ok = decode_config4(c);
419 if (ok)
420 ok = decode_config5(c);
421
422 mips_probe_watch_registers(c);
423
424 #ifndef CONFIG_MIPS_CPS
425 if (cpu_has_mips_r2) {
426 c->core = read_c0_ebase() & 0x3ff;
427 if (cpu_has_mipsmt)
428 c->core >>= fls(core_nvpes()) - 1;
429 }
430 #endif
431 }
432
433 #define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \
434 | MIPS_CPU_COUNTER)
435
436 static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
437 {
438 switch (c->processor_id & PRID_IMP_MASK) {
439 case PRID_IMP_R2000:
440 c->cputype = CPU_R2000;
441 __cpu_name[cpu] = "R2000";
442 c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE |
443 MIPS_CPU_NOFPUEX;
444 if (__cpu_has_fpu())
445 c->options |= MIPS_CPU_FPU;
446 c->tlbsize = 64;
447 break;
448 case PRID_IMP_R3000:
449 if ((c->processor_id & PRID_REV_MASK) == PRID_REV_R3000A) {
450 if (cpu_has_confreg()) {
451 c->cputype = CPU_R3081E;
452 __cpu_name[cpu] = "R3081";
453 } else {
454 c->cputype = CPU_R3000A;
455 __cpu_name[cpu] = "R3000A";
456 }
457 } else {
458 c->cputype = CPU_R3000;
459 __cpu_name[cpu] = "R3000";
460 }
461 c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE |
462 MIPS_CPU_NOFPUEX;
463 if (__cpu_has_fpu())
464 c->options |= MIPS_CPU_FPU;
465 c->tlbsize = 64;
466 break;
467 case PRID_IMP_R4000:
468 if (read_c0_config() & CONF_SC) {
469 if ((c->processor_id & PRID_REV_MASK) >=
470 PRID_REV_R4400) {
471 c->cputype = CPU_R4400PC;
472 __cpu_name[cpu] = "R4400PC";
473 } else {
474 c->cputype = CPU_R4000PC;
475 __cpu_name[cpu] = "R4000PC";
476 }
477 } else {
478 int cca = read_c0_config() & CONF_CM_CMASK;
479 int mc;
480
481 /*
482 * SC and MC versions can't be reliably told apart,
483 * but only the latter support coherent caching
484 * modes so assume the firmware has set the KSEG0
485 * coherency attribute reasonably (if uncached, we
486 * assume SC).
487 */
488 switch (cca) {
489 case CONF_CM_CACHABLE_CE:
490 case CONF_CM_CACHABLE_COW:
491 case CONF_CM_CACHABLE_CUW:
492 mc = 1;
493 break;
494 default:
495 mc = 0;
496 break;
497 }
498 if ((c->processor_id & PRID_REV_MASK) >=
499 PRID_REV_R4400) {
500 c->cputype = mc ? CPU_R4400MC : CPU_R4400SC;
501 __cpu_name[cpu] = mc ? "R4400MC" : "R4400SC";
502 } else {
503 c->cputype = mc ? CPU_R4000MC : CPU_R4000SC;
504 __cpu_name[cpu] = mc ? "R4000MC" : "R4000SC";
505 }
506 }
507
508 set_isa(c, MIPS_CPU_ISA_III);
509 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
510 MIPS_CPU_WATCH | MIPS_CPU_VCE |
511 MIPS_CPU_LLSC;
512 c->tlbsize = 48;
513 break;
514 case PRID_IMP_VR41XX:
515 set_isa(c, MIPS_CPU_ISA_III);
516 c->options = R4K_OPTS;
517 c->tlbsize = 32;
518 switch (c->processor_id & 0xf0) {
519 case PRID_REV_VR4111:
520 c->cputype = CPU_VR4111;
521 __cpu_name[cpu] = "NEC VR4111";
522 break;
523 case PRID_REV_VR4121:
524 c->cputype = CPU_VR4121;
525 __cpu_name[cpu] = "NEC VR4121";
526 break;
527 case PRID_REV_VR4122:
528 if ((c->processor_id & 0xf) < 0x3) {
529 c->cputype = CPU_VR4122;
530 __cpu_name[cpu] = "NEC VR4122";
531 } else {
532 c->cputype = CPU_VR4181A;
533 __cpu_name[cpu] = "NEC VR4181A";
534 }
535 break;
536 case PRID_REV_VR4130:
537 if ((c->processor_id & 0xf) < 0x4) {
538 c->cputype = CPU_VR4131;
539 __cpu_name[cpu] = "NEC VR4131";
540 } else {
541 c->cputype = CPU_VR4133;
542 c->options |= MIPS_CPU_LLSC;
543 __cpu_name[cpu] = "NEC VR4133";
544 }
545 break;
546 default:
547 printk(KERN_INFO "Unexpected CPU of NEC VR4100 series\n");
548 c->cputype = CPU_VR41XX;
549 __cpu_name[cpu] = "NEC Vr41xx";
550 break;
551 }
552 break;
553 case PRID_IMP_R4300:
554 c->cputype = CPU_R4300;
555 __cpu_name[cpu] = "R4300";
556 set_isa(c, MIPS_CPU_ISA_III);
557 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
558 MIPS_CPU_LLSC;
559 c->tlbsize = 32;
560 break;
561 case PRID_IMP_R4600:
562 c->cputype = CPU_R4600;
563 __cpu_name[cpu] = "R4600";
564 set_isa(c, MIPS_CPU_ISA_III);
565 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
566 MIPS_CPU_LLSC;
567 c->tlbsize = 48;
568 break;
569 #if 0
570 case PRID_IMP_R4650:
571 /*
572 * This processor doesn't have an MMU, so it's not
573 * "real easy" to run Linux on it. It is left purely
574 * for documentation. Commented out because it shares
575 * it's c0_prid id number with the TX3900.
576 */
577 c->cputype = CPU_R4650;
578 __cpu_name[cpu] = "R4650";
579 set_isa(c, MIPS_CPU_ISA_III);
580 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_LLSC;
581 c->tlbsize = 48;
582 break;
583 #endif
584 case PRID_IMP_TX39:
585 c->options = MIPS_CPU_TLB | MIPS_CPU_TX39_CACHE;
586
587 if ((c->processor_id & 0xf0) == (PRID_REV_TX3927 & 0xf0)) {
588 c->cputype = CPU_TX3927;
589 __cpu_name[cpu] = "TX3927";
590 c->tlbsize = 64;
591 } else {
592 switch (c->processor_id & PRID_REV_MASK) {
593 case PRID_REV_TX3912:
594 c->cputype = CPU_TX3912;
595 __cpu_name[cpu] = "TX3912";
596 c->tlbsize = 32;
597 break;
598 case PRID_REV_TX3922:
599 c->cputype = CPU_TX3922;
600 __cpu_name[cpu] = "TX3922";
601 c->tlbsize = 64;
602 break;
603 }
604 }
605 break;
606 case PRID_IMP_R4700:
607 c->cputype = CPU_R4700;
608 __cpu_name[cpu] = "R4700";
609 set_isa(c, MIPS_CPU_ISA_III);
610 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
611 MIPS_CPU_LLSC;
612 c->tlbsize = 48;
613 break;
614 case PRID_IMP_TX49:
615 c->cputype = CPU_TX49XX;
616 __cpu_name[cpu] = "R49XX";
617 set_isa(c, MIPS_CPU_ISA_III);
618 c->options = R4K_OPTS | MIPS_CPU_LLSC;
619 if (!(c->processor_id & 0x08))
620 c->options |= MIPS_CPU_FPU | MIPS_CPU_32FPR;
621 c->tlbsize = 48;
622 break;
623 case PRID_IMP_R5000:
624 c->cputype = CPU_R5000;
625 __cpu_name[cpu] = "R5000";
626 set_isa(c, MIPS_CPU_ISA_IV);
627 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
628 MIPS_CPU_LLSC;
629 c->tlbsize = 48;
630 break;
631 case PRID_IMP_R5432:
632 c->cputype = CPU_R5432;
633 __cpu_name[cpu] = "R5432";
634 set_isa(c, MIPS_CPU_ISA_IV);
635 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
636 MIPS_CPU_WATCH | MIPS_CPU_LLSC;
637 c->tlbsize = 48;
638 break;
639 case PRID_IMP_R5500:
640 c->cputype = CPU_R5500;
641 __cpu_name[cpu] = "R5500";
642 set_isa(c, MIPS_CPU_ISA_IV);
643 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
644 MIPS_CPU_WATCH | MIPS_CPU_LLSC;
645 c->tlbsize = 48;
646 break;
647 case PRID_IMP_NEVADA:
648 c->cputype = CPU_NEVADA;
649 __cpu_name[cpu] = "Nevada";
650 set_isa(c, MIPS_CPU_ISA_IV);
651 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
652 MIPS_CPU_DIVEC | MIPS_CPU_LLSC;
653 c->tlbsize = 48;
654 break;
655 case PRID_IMP_R6000:
656 c->cputype = CPU_R6000;
657 __cpu_name[cpu] = "R6000";
658 set_isa(c, MIPS_CPU_ISA_II);
659 c->options = MIPS_CPU_TLB | MIPS_CPU_FPU |
660 MIPS_CPU_LLSC;
661 c->tlbsize = 32;
662 break;
663 case PRID_IMP_R6000A:
664 c->cputype = CPU_R6000A;
665 __cpu_name[cpu] = "R6000A";
666 set_isa(c, MIPS_CPU_ISA_II);
667 c->options = MIPS_CPU_TLB | MIPS_CPU_FPU |
668 MIPS_CPU_LLSC;
669 c->tlbsize = 32;
670 break;
671 case PRID_IMP_RM7000:
672 c->cputype = CPU_RM7000;
673 __cpu_name[cpu] = "RM7000";
674 set_isa(c, MIPS_CPU_ISA_IV);
675 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
676 MIPS_CPU_LLSC;
677 /*
678 * Undocumented RM7000: Bit 29 in the info register of
679 * the RM7000 v2.0 indicates if the TLB has 48 or 64
680 * entries.
681 *
682 * 29 1 => 64 entry JTLB
683 * 0 => 48 entry JTLB
684 */
685 c->tlbsize = (read_c0_info() & (1 << 29)) ? 64 : 48;
686 break;
687 case PRID_IMP_RM9000:
688 c->cputype = CPU_RM9000;
689 __cpu_name[cpu] = "RM9000";
690 set_isa(c, MIPS_CPU_ISA_IV);
691 c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
692 MIPS_CPU_LLSC;
693 /*
694 * Bit 29 in the info register of the RM9000
695 * indicates if the TLB has 48 or 64 entries.
696 *
697 * 29 1 => 64 entry JTLB
698 * 0 => 48 entry JTLB
699 */
700 c->tlbsize = (read_c0_info() & (1 << 29)) ? 64 : 48;
701 break;
702 case PRID_IMP_R8000:
703 c->cputype = CPU_R8000;
704 __cpu_name[cpu] = "RM8000";
705 set_isa(c, MIPS_CPU_ISA_IV);
706 c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX |
707 MIPS_CPU_FPU | MIPS_CPU_32FPR |
708 MIPS_CPU_LLSC;
709 c->tlbsize = 384; /* has weird TLB: 3-way x 128 */
710 break;
711 case PRID_IMP_R10000:
712 c->cputype = CPU_R10000;
713 __cpu_name[cpu] = "R10000";
714 set_isa(c, MIPS_CPU_ISA_IV);
715 c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
716 MIPS_CPU_FPU | MIPS_CPU_32FPR |
717 MIPS_CPU_COUNTER | MIPS_CPU_WATCH |
718 MIPS_CPU_LLSC;
719 c->tlbsize = 64;
720 break;
721 case PRID_IMP_R12000:
722 c->cputype = CPU_R12000;
723 __cpu_name[cpu] = "R12000";
724 set_isa(c, MIPS_CPU_ISA_IV);
725 c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
726 MIPS_CPU_FPU | MIPS_CPU_32FPR |
727 MIPS_CPU_COUNTER | MIPS_CPU_WATCH |
728 MIPS_CPU_LLSC;
729 c->tlbsize = 64;
730 break;
731 case PRID_IMP_R14000:
732 c->cputype = CPU_R14000;
733 __cpu_name[cpu] = "R14000";
734 set_isa(c, MIPS_CPU_ISA_IV);
735 c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
736 MIPS_CPU_FPU | MIPS_CPU_32FPR |
737 MIPS_CPU_COUNTER | MIPS_CPU_WATCH |
738 MIPS_CPU_LLSC;
739 c->tlbsize = 64;
740 break;
741 case PRID_IMP_LOONGSON_64: /* Loongson-2/3 */
742 switch (c->processor_id & PRID_REV_MASK) {
743 case PRID_REV_LOONGSON2E:
744 c->cputype = CPU_LOONGSON2;
745 __cpu_name[cpu] = "ICT Loongson-2";
746 set_elf_platform(cpu, "loongson2e");
747 break;
748 case PRID_REV_LOONGSON2F:
749 c->cputype = CPU_LOONGSON2;
750 __cpu_name[cpu] = "ICT Loongson-2";
751 set_elf_platform(cpu, "loongson2f");
752 break;
753 case PRID_REV_LOONGSON3A:
754 c->cputype = CPU_LOONGSON3;
755 __cpu_name[cpu] = "ICT Loongson-3";
756 set_elf_platform(cpu, "loongson3a");
757 break;
758 }
759
760 set_isa(c, MIPS_CPU_ISA_III);
761 c->options = R4K_OPTS |
762 MIPS_CPU_FPU | MIPS_CPU_LLSC |
763 MIPS_CPU_32FPR;
764 c->tlbsize = 64;
765 break;
766 case PRID_IMP_LOONGSON_32: /* Loongson-1 */
767 decode_configs(c);
768
769 c->cputype = CPU_LOONGSON1;
770
771 switch (c->processor_id & PRID_REV_MASK) {
772 case PRID_REV_LOONGSON1B:
773 __cpu_name[cpu] = "Loongson 1B";
774 break;
775 }
776
777 break;
778 }
779 }
780
781 static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
782 {
783 switch (c->processor_id & PRID_IMP_MASK) {
784 case PRID_IMP_4KC:
785 c->cputype = CPU_4KC;
786 __cpu_name[cpu] = "MIPS 4Kc";
787 break;
788 case PRID_IMP_4KEC:
789 case PRID_IMP_4KECR2:
790 c->cputype = CPU_4KEC;
791 __cpu_name[cpu] = "MIPS 4KEc";
792 break;
793 case PRID_IMP_4KSC:
794 case PRID_IMP_4KSD:
795 c->cputype = CPU_4KSC;
796 __cpu_name[cpu] = "MIPS 4KSc";
797 break;
798 case PRID_IMP_5KC:
799 c->cputype = CPU_5KC;
800 __cpu_name[cpu] = "MIPS 5Kc";
801 break;
802 case PRID_IMP_5KE:
803 c->cputype = CPU_5KE;
804 __cpu_name[cpu] = "MIPS 5KE";
805 break;
806 case PRID_IMP_20KC:
807 c->cputype = CPU_20KC;
808 __cpu_name[cpu] = "MIPS 20Kc";
809 break;
810 case PRID_IMP_24K:
811 c->cputype = CPU_24K;
812 __cpu_name[cpu] = "MIPS 24Kc";
813 break;
814 case PRID_IMP_24KE:
815 c->cputype = CPU_24K;
816 __cpu_name[cpu] = "MIPS 24KEc";
817 break;
818 case PRID_IMP_25KF:
819 c->cputype = CPU_25KF;
820 __cpu_name[cpu] = "MIPS 25Kc";
821 break;
822 case PRID_IMP_34K:
823 c->cputype = CPU_34K;
824 __cpu_name[cpu] = "MIPS 34Kc";
825 break;
826 case PRID_IMP_74K:
827 c->cputype = CPU_74K;
828 __cpu_name[cpu] = "MIPS 74Kc";
829 break;
830 case PRID_IMP_M14KC:
831 c->cputype = CPU_M14KC;
832 __cpu_name[cpu] = "MIPS M14Kc";
833 break;
834 case PRID_IMP_M14KEC:
835 c->cputype = CPU_M14KEC;
836 __cpu_name[cpu] = "MIPS M14KEc";
837 break;
838 case PRID_IMP_1004K:
839 c->cputype = CPU_1004K;
840 __cpu_name[cpu] = "MIPS 1004Kc";
841 break;
842 case PRID_IMP_1074K:
843 c->cputype = CPU_1074K;
844 __cpu_name[cpu] = "MIPS 1074Kc";
845 break;
846 case PRID_IMP_INTERAPTIV_UP:
847 c->cputype = CPU_INTERAPTIV;
848 __cpu_name[cpu] = "MIPS interAptiv";
849 break;
850 case PRID_IMP_INTERAPTIV_MP:
851 c->cputype = CPU_INTERAPTIV;
852 __cpu_name[cpu] = "MIPS interAptiv (multi)";
853 break;
854 case PRID_IMP_PROAPTIV_UP:
855 c->cputype = CPU_PROAPTIV;
856 __cpu_name[cpu] = "MIPS proAptiv";
857 break;
858 case PRID_IMP_PROAPTIV_MP:
859 c->cputype = CPU_PROAPTIV;
860 __cpu_name[cpu] = "MIPS proAptiv (multi)";
861 break;
862 case PRID_IMP_P5600:
863 c->cputype = CPU_P5600;
864 __cpu_name[cpu] = "MIPS P5600";
865 break;
866 case PRID_IMP_M5150:
867 c->cputype = CPU_M5150;
868 __cpu_name[cpu] = "MIPS M5150";
869 break;
870 }
871
872 decode_configs(c);
873
874 spram_config();
875 }
876
877 static inline void cpu_probe_alchemy(struct cpuinfo_mips *c, unsigned int cpu)
878 {
879 decode_configs(c);
880 switch (c->processor_id & PRID_IMP_MASK) {
881 case PRID_IMP_AU1_REV1:
882 case PRID_IMP_AU1_REV2:
883 c->cputype = CPU_ALCHEMY;
884 switch ((c->processor_id >> 24) & 0xff) {
885 case 0:
886 __cpu_name[cpu] = "Au1000";
887 break;
888 case 1:
889 __cpu_name[cpu] = "Au1500";
890 break;
891 case 2:
892 __cpu_name[cpu] = "Au1100";
893 break;
894 case 3:
895 __cpu_name[cpu] = "Au1550";
896 break;
897 case 4:
898 __cpu_name[cpu] = "Au1200";
899 if ((c->processor_id & PRID_REV_MASK) == 2)
900 __cpu_name[cpu] = "Au1250";
901 break;
902 case 5:
903 __cpu_name[cpu] = "Au1210";
904 break;
905 default:
906 __cpu_name[cpu] = "Au1xxx";
907 break;
908 }
909 break;
910 }
911 }
912
913 static inline void cpu_probe_sibyte(struct cpuinfo_mips *c, unsigned int cpu)
914 {
915 decode_configs(c);
916
917 switch (c->processor_id & PRID_IMP_MASK) {
918 case PRID_IMP_SB1:
919 c->cputype = CPU_SB1;
920 __cpu_name[cpu] = "SiByte SB1";
921 /* FPU in pass1 is known to have issues. */
922 if ((c->processor_id & PRID_REV_MASK) < 0x02)
923 c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR);
924 break;
925 case PRID_IMP_SB1A:
926 c->cputype = CPU_SB1A;
927 __cpu_name[cpu] = "SiByte SB1A";
928 break;
929 }
930 }
931
932 static inline void cpu_probe_sandcraft(struct cpuinfo_mips *c, unsigned int cpu)
933 {
934 decode_configs(c);
935 switch (c->processor_id & PRID_IMP_MASK) {
936 case PRID_IMP_SR71000:
937 c->cputype = CPU_SR71000;
938 __cpu_name[cpu] = "Sandcraft SR71000";
939 c->scache.ways = 8;
940 c->tlbsize = 64;
941 break;
942 }
943 }
944
945 static inline void cpu_probe_nxp(struct cpuinfo_mips *c, unsigned int cpu)
946 {
947 decode_configs(c);
948 switch (c->processor_id & PRID_IMP_MASK) {
949 case PRID_IMP_PR4450:
950 c->cputype = CPU_PR4450;
951 __cpu_name[cpu] = "Philips PR4450";
952 set_isa(c, MIPS_CPU_ISA_M32R1);
953 break;
954 }
955 }
956
957 static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu)
958 {
959 decode_configs(c);
960 switch (c->processor_id & PRID_IMP_MASK) {
961 case PRID_IMP_BMIPS32_REV4:
962 case PRID_IMP_BMIPS32_REV8:
963 c->cputype = CPU_BMIPS32;
964 __cpu_name[cpu] = "Broadcom BMIPS32";
965 set_elf_platform(cpu, "bmips32");
966 break;
967 case PRID_IMP_BMIPS3300:
968 case PRID_IMP_BMIPS3300_ALT:
969 case PRID_IMP_BMIPS3300_BUG:
970 c->cputype = CPU_BMIPS3300;
971 __cpu_name[cpu] = "Broadcom BMIPS3300";
972 set_elf_platform(cpu, "bmips3300");
973 break;
974 case PRID_IMP_BMIPS43XX: {
975 int rev = c->processor_id & PRID_REV_MASK;
976
977 if (rev >= PRID_REV_BMIPS4380_LO &&
978 rev <= PRID_REV_BMIPS4380_HI) {
979 c->cputype = CPU_BMIPS4380;
980 __cpu_name[cpu] = "Broadcom BMIPS4380";
981 set_elf_platform(cpu, "bmips4380");
982 } else {
983 c->cputype = CPU_BMIPS4350;
984 __cpu_name[cpu] = "Broadcom BMIPS4350";
985 set_elf_platform(cpu, "bmips4350");
986 }
987 break;
988 }
989 case PRID_IMP_BMIPS5000:
990 c->cputype = CPU_BMIPS5000;
991 __cpu_name[cpu] = "Broadcom BMIPS5000";
992 set_elf_platform(cpu, "bmips5000");
993 c->options |= MIPS_CPU_ULRI;
994 break;
995 }
996 }
997
998 static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu)
999 {
1000 decode_configs(c);
1001 switch (c->processor_id & PRID_IMP_MASK) {
1002 case PRID_IMP_CAVIUM_CN38XX:
1003 case PRID_IMP_CAVIUM_CN31XX:
1004 case PRID_IMP_CAVIUM_CN30XX:
1005 c->cputype = CPU_CAVIUM_OCTEON;
1006 __cpu_name[cpu] = "Cavium Octeon";
1007 goto platform;
1008 case PRID_IMP_CAVIUM_CN58XX:
1009 case PRID_IMP_CAVIUM_CN56XX:
1010 case PRID_IMP_CAVIUM_CN50XX:
1011 case PRID_IMP_CAVIUM_CN52XX:
1012 c->cputype = CPU_CAVIUM_OCTEON_PLUS;
1013 __cpu_name[cpu] = "Cavium Octeon+";
1014 platform:
1015 set_elf_platform(cpu, "octeon");
1016 break;
1017 case PRID_IMP_CAVIUM_CN61XX:
1018 case PRID_IMP_CAVIUM_CN63XX:
1019 case PRID_IMP_CAVIUM_CN66XX:
1020 case PRID_IMP_CAVIUM_CN68XX:
1021 case PRID_IMP_CAVIUM_CNF71XX:
1022 c->cputype = CPU_CAVIUM_OCTEON2;
1023 __cpu_name[cpu] = "Cavium Octeon II";
1024 set_elf_platform(cpu, "octeon2");
1025 break;
1026 case PRID_IMP_CAVIUM_CN70XX:
1027 case PRID_IMP_CAVIUM_CN78XX:
1028 c->cputype = CPU_CAVIUM_OCTEON3;
1029 __cpu_name[cpu] = "Cavium Octeon III";
1030 set_elf_platform(cpu, "octeon3");
1031 break;
1032 default:
1033 printk(KERN_INFO "Unknown Octeon chip!\n");
1034 c->cputype = CPU_UNKNOWN;
1035 break;
1036 }
1037 }
1038
1039 static inline void cpu_probe_ingenic(struct cpuinfo_mips *c, unsigned int cpu)
1040 {
1041 decode_configs(c);
1042 /* JZRISC does not implement the CP0 counter. */
1043 c->options &= ~MIPS_CPU_COUNTER;
1044 switch (c->processor_id & PRID_IMP_MASK) {
1045 case PRID_IMP_JZRISC:
1046 c->cputype = CPU_JZRISC;
1047 __cpu_name[cpu] = "Ingenic JZRISC";
1048 break;
1049 default:
1050 panic("Unknown Ingenic Processor ID!");
1051 break;
1052 }
1053 }
1054
1055 static inline void cpu_probe_netlogic(struct cpuinfo_mips *c, int cpu)
1056 {
1057 decode_configs(c);
1058
1059 if ((c->processor_id & PRID_IMP_MASK) == PRID_IMP_NETLOGIC_AU13XX) {
1060 c->cputype = CPU_ALCHEMY;
1061 __cpu_name[cpu] = "Au1300";
1062 /* following stuff is not for Alchemy */
1063 return;
1064 }
1065
1066 c->options = (MIPS_CPU_TLB |
1067 MIPS_CPU_4KEX |
1068 MIPS_CPU_COUNTER |
1069 MIPS_CPU_DIVEC |
1070 MIPS_CPU_WATCH |
1071 MIPS_CPU_EJTAG |
1072 MIPS_CPU_LLSC);
1073
1074 switch (c->processor_id & PRID_IMP_MASK) {
1075 case PRID_IMP_NETLOGIC_XLP2XX:
1076 case PRID_IMP_NETLOGIC_XLP9XX:
1077 c->cputype = CPU_XLP;
1078 __cpu_name[cpu] = "Broadcom XLPII";
1079 break;
1080
1081 case PRID_IMP_NETLOGIC_XLP8XX:
1082 case PRID_IMP_NETLOGIC_XLP3XX:
1083 c->cputype = CPU_XLP;
1084 __cpu_name[cpu] = "Netlogic XLP";
1085 break;
1086
1087 case PRID_IMP_NETLOGIC_XLR732:
1088 case PRID_IMP_NETLOGIC_XLR716:
1089 case PRID_IMP_NETLOGIC_XLR532:
1090 case PRID_IMP_NETLOGIC_XLR308:
1091 case PRID_IMP_NETLOGIC_XLR532C:
1092 case PRID_IMP_NETLOGIC_XLR516C:
1093 case PRID_IMP_NETLOGIC_XLR508C:
1094 case PRID_IMP_NETLOGIC_XLR308C:
1095 c->cputype = CPU_XLR;
1096 __cpu_name[cpu] = "Netlogic XLR";
1097 break;
1098
1099 case PRID_IMP_NETLOGIC_XLS608:
1100 case PRID_IMP_NETLOGIC_XLS408:
1101 case PRID_IMP_NETLOGIC_XLS404:
1102 case PRID_IMP_NETLOGIC_XLS208:
1103 case PRID_IMP_NETLOGIC_XLS204:
1104 case PRID_IMP_NETLOGIC_XLS108:
1105 case PRID_IMP_NETLOGIC_XLS104:
1106 case PRID_IMP_NETLOGIC_XLS616B:
1107 case PRID_IMP_NETLOGIC_XLS608B:
1108 case PRID_IMP_NETLOGIC_XLS416B:
1109 case PRID_IMP_NETLOGIC_XLS412B:
1110 case PRID_IMP_NETLOGIC_XLS408B:
1111 case PRID_IMP_NETLOGIC_XLS404B:
1112 c->cputype = CPU_XLR;
1113 __cpu_name[cpu] = "Netlogic XLS";
1114 break;
1115
1116 default:
1117 pr_info("Unknown Netlogic chip id [%02x]!\n",
1118 c->processor_id);
1119 c->cputype = CPU_XLR;
1120 break;
1121 }
1122
1123 if (c->cputype == CPU_XLP) {
1124 set_isa(c, MIPS_CPU_ISA_M64R2);
1125 c->options |= (MIPS_CPU_FPU | MIPS_CPU_ULRI | MIPS_CPU_MCHECK);
1126 /* This will be updated again after all threads are woken up */
1127 c->tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1;
1128 } else {
1129 set_isa(c, MIPS_CPU_ISA_M64R1);
1130 c->tlbsize = ((read_c0_config1() >> 25) & 0x3f) + 1;
1131 }
1132 c->kscratch_mask = 0xf;
1133 }
1134
1135 #ifdef CONFIG_64BIT
1136 /* For use by uaccess.h */
1137 u64 __ua_limit;
1138 EXPORT_SYMBOL(__ua_limit);
1139 #endif
1140
1141 const char *__cpu_name[NR_CPUS];
1142 const char *__elf_platform;
1143
1144 void cpu_probe(void)
1145 {
1146 struct cpuinfo_mips *c = &current_cpu_data;
1147 unsigned int cpu = smp_processor_id();
1148
1149 c->processor_id = PRID_IMP_UNKNOWN;
1150 c->fpu_id = FPIR_IMP_NONE;
1151 c->cputype = CPU_UNKNOWN;
1152
1153 c->processor_id = read_c0_prid();
1154 switch (c->processor_id & PRID_COMP_MASK) {
1155 case PRID_COMP_LEGACY:
1156 cpu_probe_legacy(c, cpu);
1157 break;
1158 case PRID_COMP_MIPS:
1159 cpu_probe_mips(c, cpu);
1160 break;
1161 case PRID_COMP_ALCHEMY:
1162 cpu_probe_alchemy(c, cpu);
1163 break;
1164 case PRID_COMP_SIBYTE:
1165 cpu_probe_sibyte(c, cpu);
1166 break;
1167 case PRID_COMP_BROADCOM:
1168 cpu_probe_broadcom(c, cpu);
1169 break;
1170 case PRID_COMP_SANDCRAFT:
1171 cpu_probe_sandcraft(c, cpu);
1172 break;
1173 case PRID_COMP_NXP:
1174 cpu_probe_nxp(c, cpu);
1175 break;
1176 case PRID_COMP_CAVIUM:
1177 cpu_probe_cavium(c, cpu);
1178 break;
1179 case PRID_COMP_INGENIC:
1180 cpu_probe_ingenic(c, cpu);
1181 break;
1182 case PRID_COMP_NETLOGIC:
1183 cpu_probe_netlogic(c, cpu);
1184 break;
1185 }
1186
1187 BUG_ON(!__cpu_name[cpu]);
1188 BUG_ON(c->cputype == CPU_UNKNOWN);
1189
1190 /*
1191 * Platform code can force the cpu type to optimize code
1192 * generation. In that case be sure the cpu type is correctly
1193 * manually setup otherwise it could trigger some nasty bugs.
1194 */
1195 BUG_ON(current_cpu_type() != c->cputype);
1196
1197 if (mips_fpu_disabled)
1198 c->options &= ~MIPS_CPU_FPU;
1199
1200 if (mips_dsp_disabled)
1201 c->ases &= ~(MIPS_ASE_DSP | MIPS_ASE_DSP2P);
1202
1203 if (c->options & MIPS_CPU_FPU) {
1204 c->fpu_id = cpu_get_fpu_id();
1205
1206 if (c->isa_level & (MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M32R2 |
1207 MIPS_CPU_ISA_M64R1 | MIPS_CPU_ISA_M64R2)) {
1208 if (c->fpu_id & MIPS_FPIR_3D)
1209 c->ases |= MIPS_ASE_MIPS3D;
1210 }
1211 }
1212
1213 if (cpu_has_mips_r2) {
1214 c->srsets = ((read_c0_srsctl() >> 26) & 0x0f) + 1;
1215 /* R2 has Performance Counter Interrupt indicator */
1216 c->options |= MIPS_CPU_PCI;
1217 }
1218 else
1219 c->srsets = 1;
1220
1221 if (cpu_has_msa) {
1222 c->msa_id = cpu_get_msa_id();
1223 WARN(c->msa_id & MSA_IR_WRPF,
1224 "Vector register partitioning unimplemented!");
1225 }
1226
1227 cpu_probe_vmbits(c);
1228
1229 #ifdef CONFIG_64BIT
1230 if (cpu == 0)
1231 __ua_limit = ~((1ull << cpu_vmbits) - 1);
1232 #endif
1233 }
1234
1235 void cpu_report(void)
1236 {
1237 struct cpuinfo_mips *c = &current_cpu_data;
1238
1239 pr_info("CPU%d revision is: %08x (%s)\n",
1240 smp_processor_id(), c->processor_id, cpu_name_string());
1241 if (c->options & MIPS_CPU_FPU)
1242 printk(KERN_INFO "FPU revision is: %08x\n", c->fpu_id);
1243 if (cpu_has_msa)
1244 pr_info("MSA revision is: %08x\n", c->msa_id);
1245 }
Linux with added FPC-III support