Commit | Line | Data |
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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 |
70342287 | 7 | * Copyright (C) 2001, 2004, 2011, 2012 MIPS Technologies, 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 | 18 | #include <linux/stddef.h> |
73bc256d | 19 | #include <linux/export.h> |
1da177e4 | 20 | |
5759906c | 21 | #include <asm/bugs.h> |
1da177e4 | 22 | #include <asm/cpu.h> |
69f24d17 | 23 | #include <asm/cpu-type.h> |
1da177e4 LT |
24 | #include <asm/fpu.h> |
25 | #include <asm/mipsregs.h> | |
30ee615b | 26 | #include <asm/mipsmtregs.h> |
a5e9a69e | 27 | #include <asm/msa.h> |
654f57bf | 28 | #include <asm/watch.h> |
06372a63 | 29 | #include <asm/elf.h> |
4f12b91d | 30 | #include <asm/pgtable-bits.h> |
a074f0e8 | 31 | #include <asm/spram.h> |
949e51be DD |
32 | #include <asm/uaccess.h> |
33 | ||
078a55fc | 34 | static int mips_fpu_disabled; |
0103d23f KC |
35 | |
36 | static int __init fpu_disable(char *s) | |
37 | { | |
38 | cpu_data[0].options &= ~MIPS_CPU_FPU; | |
39 | mips_fpu_disabled = 1; | |
40 | ||
41 | return 1; | |
42 | } | |
43 | ||
44 | __setup("nofpu", fpu_disable); | |
45 | ||
078a55fc | 46 | int mips_dsp_disabled; |
0103d23f KC |
47 | |
48 | static int __init dsp_disable(char *s) | |
49 | { | |
ee80f7c7 | 50 | cpu_data[0].ases &= ~(MIPS_ASE_DSP | MIPS_ASE_DSP2P); |
0103d23f KC |
51 | mips_dsp_disabled = 1; |
52 | ||
53 | return 1; | |
54 | } | |
55 | ||
56 | __setup("nodsp", dsp_disable); | |
57 | ||
3d528b32 MC |
58 | static int mips_htw_disabled; |
59 | ||
60 | static int __init htw_disable(char *s) | |
61 | { | |
62 | mips_htw_disabled = 1; | |
63 | cpu_data[0].options &= ~MIPS_CPU_HTW; | |
64 | write_c0_pwctl(read_c0_pwctl() & | |
65 | ~(1 << MIPS_PWCTL_PWEN_SHIFT)); | |
66 | ||
67 | return 1; | |
68 | } | |
69 | ||
70 | __setup("nohtw", htw_disable); | |
71 | ||
97f4ad29 MC |
72 | static int mips_ftlb_disabled; |
73 | static int mips_has_ftlb_configured; | |
74 | ||
75 | static void set_ftlb_enable(struct cpuinfo_mips *c, int enable); | |
76 | ||
77 | static int __init ftlb_disable(char *s) | |
78 | { | |
79 | unsigned int config4, mmuextdef; | |
80 | ||
81 | /* | |
82 | * If the core hasn't done any FTLB configuration, there is nothing | |
83 | * for us to do here. | |
84 | */ | |
85 | if (!mips_has_ftlb_configured) | |
86 | return 1; | |
87 | ||
88 | /* Disable it in the boot cpu */ | |
89 | set_ftlb_enable(&cpu_data[0], 0); | |
90 | ||
91 | back_to_back_c0_hazard(); | |
92 | ||
93 | config4 = read_c0_config4(); | |
94 | ||
95 | /* Check that FTLB has been disabled */ | |
96 | mmuextdef = config4 & MIPS_CONF4_MMUEXTDEF; | |
97 | /* MMUSIZEEXT == VTLB ON, FTLB OFF */ | |
98 | if (mmuextdef == MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT) { | |
99 | /* This should never happen */ | |
100 | pr_warn("FTLB could not be disabled!\n"); | |
101 | return 1; | |
102 | } | |
103 | ||
104 | mips_ftlb_disabled = 1; | |
105 | mips_has_ftlb_configured = 0; | |
106 | ||
107 | /* | |
108 | * noftlb is mainly used for debug purposes so print | |
109 | * an informative message instead of using pr_debug() | |
110 | */ | |
111 | pr_info("FTLB has been disabled\n"); | |
112 | ||
113 | /* | |
114 | * Some of these bits are duplicated in the decode_config4. | |
115 | * MIPS_CONF4_MMUEXTDEF_MMUSIZEEXT is the only possible case | |
116 | * once FTLB has been disabled so undo what decode_config4 did. | |
117 | */ | |
118 | cpu_data[0].tlbsize -= cpu_data[0].tlbsizeftlbways * | |
119 | cpu_data[0].tlbsizeftlbsets; | |
120 | cpu_data[0].tlbsizeftlbsets = 0; | |
121 | cpu_data[0].tlbsizeftlbways = 0; | |
122 | ||
123 | return 1; | |
124 | } | |
125 | ||
126 | __setup("noftlb", ftlb_disable); | |
127 | ||
128 | ||
9267a30d MSJ |
129 | static inline void check_errata(void) |
130 | { | |
131 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
132 | ||
69f24d17 | 133 | switch (current_cpu_type()) { |
9267a30d MSJ |
134 | case CPU_34K: |
135 | /* | |
136 | * Erratum "RPS May Cause Incorrect Instruction Execution" | |
b633648c | 137 | * This code only handles VPE0, any SMP/RTOS code |
9267a30d MSJ |
138 | * making use of VPE1 will be responsable for that VPE. |
139 | */ | |
140 | if ((c->processor_id & PRID_REV_MASK) <= PRID_REV_34K_V1_0_2) | |
141 | write_c0_config7(read_c0_config7() | MIPS_CONF7_RPS); | |
142 | break; | |
143 | default: | |
144 | break; | |
145 | } | |
146 | } | |
147 | ||
1da177e4 LT |
148 | void __init check_bugs32(void) |
149 | { | |
9267a30d | 150 | check_errata(); |
1da177e4 LT |
151 | } |
152 | ||
153 | /* | |
154 | * Probe whether cpu has config register by trying to play with | |
155 | * alternate cache bit and see whether it matters. | |
156 | * It's used by cpu_probe to distinguish between R3000A and R3081. | |
157 | */ | |
158 | static inline int cpu_has_confreg(void) | |
159 | { | |
160 | #ifdef CONFIG_CPU_R3000 | |
161 | extern unsigned long r3k_cache_size(unsigned long); | |
162 | unsigned long size1, size2; | |
163 | unsigned long cfg = read_c0_conf(); | |
164 | ||
165 | size1 = r3k_cache_size(ST0_ISC); | |
166 | write_c0_conf(cfg ^ R30XX_CONF_AC); | |
167 | size2 = r3k_cache_size(ST0_ISC); | |
168 | write_c0_conf(cfg); | |
169 | return size1 != size2; | |
170 | #else | |
171 | return 0; | |
172 | #endif | |
173 | } | |
174 | ||
c094c99e RM |
175 | static inline void set_elf_platform(int cpu, const char *plat) |
176 | { | |
177 | if (cpu == 0) | |
178 | __elf_platform = plat; | |
179 | } | |
180 | ||
1da177e4 LT |
181 | /* |
182 | * Get the FPU Implementation/Revision. | |
183 | */ | |
184 | static inline unsigned long cpu_get_fpu_id(void) | |
185 | { | |
186 | unsigned long tmp, fpu_id; | |
187 | ||
188 | tmp = read_c0_status(); | |
597ce172 | 189 | __enable_fpu(FPU_AS_IS); |
1da177e4 LT |
190 | fpu_id = read_32bit_cp1_register(CP1_REVISION); |
191 | write_c0_status(tmp); | |
192 | return fpu_id; | |
193 | } | |
194 | ||
195 | /* | |
196 | * Check the CPU has an FPU the official way. | |
197 | */ | |
198 | static inline int __cpu_has_fpu(void) | |
199 | { | |
635c9907 | 200 | return (cpu_get_fpu_id() & FPIR_IMP_MASK) != FPIR_IMP_NONE; |
1da177e4 LT |
201 | } |
202 | ||
a5e9a69e PB |
203 | static inline unsigned long cpu_get_msa_id(void) |
204 | { | |
3587ea88 | 205 | unsigned long status, msa_id; |
a5e9a69e PB |
206 | |
207 | status = read_c0_status(); | |
208 | __enable_fpu(FPU_64BIT); | |
a5e9a69e PB |
209 | enable_msa(); |
210 | msa_id = read_msa_ir(); | |
3587ea88 | 211 | disable_msa(); |
a5e9a69e PB |
212 | write_c0_status(status); |
213 | return msa_id; | |
214 | } | |
215 | ||
91dfc423 GR |
216 | static inline void cpu_probe_vmbits(struct cpuinfo_mips *c) |
217 | { | |
218 | #ifdef __NEED_VMBITS_PROBE | |
5b7efa89 | 219 | write_c0_entryhi(0x3fffffffffffe000ULL); |
91dfc423 | 220 | back_to_back_c0_hazard(); |
5b7efa89 | 221 | c->vmbits = fls64(read_c0_entryhi() & 0x3fffffffffffe000ULL); |
91dfc423 GR |
222 | #endif |
223 | } | |
224 | ||
078a55fc | 225 | static void set_isa(struct cpuinfo_mips *c, unsigned int isa) |
a96102be SH |
226 | { |
227 | switch (isa) { | |
228 | case MIPS_CPU_ISA_M64R2: | |
229 | c->isa_level |= MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M64R2; | |
230 | case MIPS_CPU_ISA_M64R1: | |
231 | c->isa_level |= MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M64R1; | |
232 | case MIPS_CPU_ISA_V: | |
233 | c->isa_level |= MIPS_CPU_ISA_V; | |
234 | case MIPS_CPU_ISA_IV: | |
235 | c->isa_level |= MIPS_CPU_ISA_IV; | |
236 | case MIPS_CPU_ISA_III: | |
1990e542 | 237 | c->isa_level |= MIPS_CPU_ISA_II | MIPS_CPU_ISA_III; |
a96102be SH |
238 | break; |
239 | ||
8b8aa636 LY |
240 | /* R6 incompatible with everything else */ |
241 | case MIPS_CPU_ISA_M64R6: | |
242 | c->isa_level |= MIPS_CPU_ISA_M32R6 | MIPS_CPU_ISA_M64R6; | |
243 | case MIPS_CPU_ISA_M32R6: | |
244 | c->isa_level |= MIPS_CPU_ISA_M32R6; | |
245 | /* Break here so we don't add incompatible ISAs */ | |
246 | break; | |
a96102be SH |
247 | case MIPS_CPU_ISA_M32R2: |
248 | c->isa_level |= MIPS_CPU_ISA_M32R2; | |
249 | case MIPS_CPU_ISA_M32R1: | |
250 | c->isa_level |= MIPS_CPU_ISA_M32R1; | |
251 | case MIPS_CPU_ISA_II: | |
252 | c->isa_level |= MIPS_CPU_ISA_II; | |
a96102be SH |
253 | break; |
254 | } | |
255 | } | |
256 | ||
078a55fc | 257 | static char unknown_isa[] = KERN_ERR \ |
2fa36399 KC |
258 | "Unsupported ISA type, c0.config0: %d."; |
259 | ||
cf0a8aa0 MC |
260 | static unsigned int calculate_ftlb_probability(struct cpuinfo_mips *c) |
261 | { | |
262 | ||
263 | unsigned int probability = c->tlbsize / c->tlbsizevtlb; | |
264 | ||
265 | /* | |
266 | * 0 = All TLBWR instructions go to FTLB | |
267 | * 1 = 15:1: For every 16 TBLWR instructions, 15 go to the | |
268 | * FTLB and 1 goes to the VTLB. | |
269 | * 2 = 7:1: As above with 7:1 ratio. | |
270 | * 3 = 3:1: As above with 3:1 ratio. | |
271 | * | |
272 | * Use the linear midpoint as the probability threshold. | |
273 | */ | |
274 | if (probability >= 12) | |
275 | return 1; | |
276 | else if (probability >= 6) | |
277 | return 2; | |
278 | else | |
279 | /* | |
280 | * So FTLB is less than 4 times bigger than VTLB. | |
281 | * A 3:1 ratio can still be useful though. | |
282 | */ | |
283 | return 3; | |
284 | } | |
285 | ||
75b5b5e0 LY |
286 | static void set_ftlb_enable(struct cpuinfo_mips *c, int enable) |
287 | { | |
288 | unsigned int config6; | |
d83b0e82 JH |
289 | |
290 | /* It's implementation dependent how the FTLB can be enabled */ | |
291 | switch (c->cputype) { | |
292 | case CPU_PROAPTIV: | |
293 | case CPU_P5600: | |
294 | /* proAptiv & related cores use Config6 to enable the FTLB */ | |
75b5b5e0 | 295 | config6 = read_c0_config6(); |
cf0a8aa0 MC |
296 | /* Clear the old probability value */ |
297 | config6 &= ~(3 << MIPS_CONF6_FTLBP_SHIFT); | |
75b5b5e0 LY |
298 | if (enable) |
299 | /* Enable FTLB */ | |
cf0a8aa0 MC |
300 | write_c0_config6(config6 | |
301 | (calculate_ftlb_probability(c) | |
302 | << MIPS_CONF6_FTLBP_SHIFT) | |
303 | | MIPS_CONF6_FTLBEN); | |
75b5b5e0 LY |
304 | else |
305 | /* Disable FTLB */ | |
306 | write_c0_config6(config6 & ~MIPS_CONF6_FTLBEN); | |
307 | back_to_back_c0_hazard(); | |
d83b0e82 | 308 | break; |
75b5b5e0 LY |
309 | } |
310 | } | |
311 | ||
2fa36399 KC |
312 | static inline unsigned int decode_config0(struct cpuinfo_mips *c) |
313 | { | |
314 | unsigned int config0; | |
315 | int isa; | |
316 | ||
317 | config0 = read_c0_config(); | |
318 | ||
75b5b5e0 LY |
319 | /* |
320 | * Look for Standard TLB or Dual VTLB and FTLB | |
321 | */ | |
322 | if ((((config0 & MIPS_CONF_MT) >> 7) == 1) || | |
323 | (((config0 & MIPS_CONF_MT) >> 7) == 4)) | |
2fa36399 | 324 | c->options |= MIPS_CPU_TLB; |
75b5b5e0 | 325 | |
2fa36399 KC |
326 | isa = (config0 & MIPS_CONF_AT) >> 13; |
327 | switch (isa) { | |
328 | case 0: | |
329 | switch ((config0 & MIPS_CONF_AR) >> 10) { | |
330 | case 0: | |
a96102be | 331 | set_isa(c, MIPS_CPU_ISA_M32R1); |
2fa36399 KC |
332 | break; |
333 | case 1: | |
a96102be | 334 | set_isa(c, MIPS_CPU_ISA_M32R2); |
2fa36399 | 335 | break; |
8b8aa636 LY |
336 | case 2: |
337 | set_isa(c, MIPS_CPU_ISA_M32R6); | |
338 | break; | |
2fa36399 KC |
339 | default: |
340 | goto unknown; | |
341 | } | |
342 | break; | |
343 | case 2: | |
344 | switch ((config0 & MIPS_CONF_AR) >> 10) { | |
345 | case 0: | |
a96102be | 346 | set_isa(c, MIPS_CPU_ISA_M64R1); |
2fa36399 KC |
347 | break; |
348 | case 1: | |
a96102be | 349 | set_isa(c, MIPS_CPU_ISA_M64R2); |
2fa36399 | 350 | break; |
8b8aa636 LY |
351 | case 2: |
352 | set_isa(c, MIPS_CPU_ISA_M64R6); | |
353 | break; | |
2fa36399 KC |
354 | default: |
355 | goto unknown; | |
356 | } | |
357 | break; | |
358 | default: | |
359 | goto unknown; | |
360 | } | |
361 | ||
362 | return config0 & MIPS_CONF_M; | |
363 | ||
364 | unknown: | |
365 | panic(unknown_isa, config0); | |
366 | } | |
367 | ||
368 | static inline unsigned int decode_config1(struct cpuinfo_mips *c) | |
369 | { | |
370 | unsigned int config1; | |
371 | ||
372 | config1 = read_c0_config1(); | |
373 | ||
374 | if (config1 & MIPS_CONF1_MD) | |
375 | c->ases |= MIPS_ASE_MDMX; | |
376 | if (config1 & MIPS_CONF1_WR) | |
377 | c->options |= MIPS_CPU_WATCH; | |
378 | if (config1 & MIPS_CONF1_CA) | |
379 | c->ases |= MIPS_ASE_MIPS16; | |
380 | if (config1 & MIPS_CONF1_EP) | |
381 | c->options |= MIPS_CPU_EJTAG; | |
382 | if (config1 & MIPS_CONF1_FP) { | |
383 | c->options |= MIPS_CPU_FPU; | |
384 | c->options |= MIPS_CPU_32FPR; | |
385 | } | |
75b5b5e0 | 386 | if (cpu_has_tlb) { |
2fa36399 | 387 | c->tlbsize = ((config1 & MIPS_CONF1_TLBS) >> 25) + 1; |
75b5b5e0 LY |
388 | c->tlbsizevtlb = c->tlbsize; |
389 | c->tlbsizeftlbsets = 0; | |
390 | } | |
2fa36399 KC |
391 | |
392 | return config1 & MIPS_CONF_M; | |
393 | } | |
394 | ||
395 | static inline unsigned int decode_config2(struct cpuinfo_mips *c) | |
396 | { | |
397 | unsigned int config2; | |
398 | ||
399 | config2 = read_c0_config2(); | |
400 | ||
401 | if (config2 & MIPS_CONF2_SL) | |
402 | c->scache.flags &= ~MIPS_CACHE_NOT_PRESENT; | |
403 | ||
404 | return config2 & MIPS_CONF_M; | |
405 | } | |
406 | ||
407 | static inline unsigned int decode_config3(struct cpuinfo_mips *c) | |
408 | { | |
409 | unsigned int config3; | |
410 | ||
411 | config3 = read_c0_config3(); | |
412 | ||
b2ab4f08 | 413 | if (config3 & MIPS_CONF3_SM) { |
2fa36399 | 414 | c->ases |= MIPS_ASE_SMARTMIPS; |
b2ab4f08 SH |
415 | c->options |= MIPS_CPU_RIXI; |
416 | } | |
417 | if (config3 & MIPS_CONF3_RXI) | |
418 | c->options |= MIPS_CPU_RIXI; | |
2fa36399 KC |
419 | if (config3 & MIPS_CONF3_DSP) |
420 | c->ases |= MIPS_ASE_DSP; | |
ee80f7c7 SH |
421 | if (config3 & MIPS_CONF3_DSP2P) |
422 | c->ases |= MIPS_ASE_DSP2P; | |
2fa36399 KC |
423 | if (config3 & MIPS_CONF3_VINT) |
424 | c->options |= MIPS_CPU_VINT; | |
425 | if (config3 & MIPS_CONF3_VEIC) | |
426 | c->options |= MIPS_CPU_VEIC; | |
427 | if (config3 & MIPS_CONF3_MT) | |
428 | c->ases |= MIPS_ASE_MIPSMT; | |
429 | if (config3 & MIPS_CONF3_ULRI) | |
430 | c->options |= MIPS_CPU_ULRI; | |
f8fa4811 SH |
431 | if (config3 & MIPS_CONF3_ISA) |
432 | c->options |= MIPS_CPU_MICROMIPS; | |
1e7decdb DD |
433 | if (config3 & MIPS_CONF3_VZ) |
434 | c->ases |= MIPS_ASE_VZ; | |
4a0156fb SH |
435 | if (config3 & MIPS_CONF3_SC) |
436 | c->options |= MIPS_CPU_SEGMENTS; | |
a5e9a69e PB |
437 | if (config3 & MIPS_CONF3_MSA) |
438 | c->ases |= MIPS_ASE_MSA; | |
3d528b32 | 439 | /* Only tested on 32-bit cores */ |
ed4cbc81 MC |
440 | if ((config3 & MIPS_CONF3_PW) && config_enabled(CONFIG_32BIT)) { |
441 | c->htw_seq = 0; | |
3d528b32 | 442 | c->options |= MIPS_CPU_HTW; |
ed4cbc81 | 443 | } |
9b3274bd JH |
444 | if (config3 & MIPS_CONF3_CDMM) |
445 | c->options |= MIPS_CPU_CDMM; | |
2fa36399 KC |
446 | |
447 | return config3 & MIPS_CONF_M; | |
448 | } | |
449 | ||
450 | static inline unsigned int decode_config4(struct cpuinfo_mips *c) | |
451 | { | |
452 | unsigned int config4; | |
75b5b5e0 LY |
453 | unsigned int newcf4; |
454 | unsigned int mmuextdef; | |
455 | unsigned int ftlb_page = MIPS_CONF4_FTLBPAGESIZE; | |
2fa36399 KC |
456 | |
457 | config4 = read_c0_config4(); | |
458 | ||
1745c1ef LY |
459 | if (cpu_has_tlb) { |
460 | if (((config4 & MIPS_CONF4_IE) >> 29) == 2) | |
461 | c->options |= MIPS_CPU_TLBINV; | |
75b5b5e0 LY |
462 | mmuextdef = config4 & MIPS_CONF4_MMUEXTDEF; |
463 | switch (mmuextdef) { | |
464 | case MIPS_CONF4_MMUEXTDEF_MMUSIZEEXT: | |
465 | c->tlbsize += (config4 & MIPS_CONF4_MMUSIZEEXT) * 0x40; | |
466 | c->tlbsizevtlb = c->tlbsize; | |
467 | break; | |
468 | case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT: | |
469 | c->tlbsizevtlb += | |
470 | ((config4 & MIPS_CONF4_VTLBSIZEEXT) >> | |
471 | MIPS_CONF4_VTLBSIZEEXT_SHIFT) * 0x40; | |
472 | c->tlbsize = c->tlbsizevtlb; | |
473 | ftlb_page = MIPS_CONF4_VFTLBPAGESIZE; | |
474 | /* fall through */ | |
475 | case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT: | |
97f4ad29 MC |
476 | if (mips_ftlb_disabled) |
477 | break; | |
75b5b5e0 LY |
478 | newcf4 = (config4 & ~ftlb_page) | |
479 | (page_size_ftlb(mmuextdef) << | |
480 | MIPS_CONF4_FTLBPAGESIZE_SHIFT); | |
481 | write_c0_config4(newcf4); | |
482 | back_to_back_c0_hazard(); | |
483 | config4 = read_c0_config4(); | |
484 | if (config4 != newcf4) { | |
485 | pr_err("PAGE_SIZE 0x%lx is not supported by FTLB (config4=0x%x)\n", | |
486 | PAGE_SIZE, config4); | |
487 | /* Switch FTLB off */ | |
488 | set_ftlb_enable(c, 0); | |
489 | break; | |
490 | } | |
491 | c->tlbsizeftlbsets = 1 << | |
492 | ((config4 & MIPS_CONF4_FTLBSETS) >> | |
493 | MIPS_CONF4_FTLBSETS_SHIFT); | |
494 | c->tlbsizeftlbways = ((config4 & MIPS_CONF4_FTLBWAYS) >> | |
495 | MIPS_CONF4_FTLBWAYS_SHIFT) + 2; | |
496 | c->tlbsize += c->tlbsizeftlbways * c->tlbsizeftlbsets; | |
97f4ad29 | 497 | mips_has_ftlb_configured = 1; |
75b5b5e0 LY |
498 | break; |
499 | } | |
1745c1ef LY |
500 | } |
501 | ||
2fa36399 KC |
502 | c->kscratch_mask = (config4 >> 16) & 0xff; |
503 | ||
504 | return config4 & MIPS_CONF_M; | |
505 | } | |
506 | ||
8b8a7634 RB |
507 | static inline unsigned int decode_config5(struct cpuinfo_mips *c) |
508 | { | |
509 | unsigned int config5; | |
510 | ||
511 | config5 = read_c0_config5(); | |
d175ed2b | 512 | config5 &= ~(MIPS_CONF5_UFR | MIPS_CONF5_UFE); |
8b8a7634 RB |
513 | write_c0_config5(config5); |
514 | ||
49016748 MC |
515 | if (config5 & MIPS_CONF5_EVA) |
516 | c->options |= MIPS_CPU_EVA; | |
1f6c52ff PB |
517 | if (config5 & MIPS_CONF5_MRP) |
518 | c->options |= MIPS_CPU_MAAR; | |
5aed9da1 MC |
519 | if (config5 & MIPS_CONF5_LLB) |
520 | c->options |= MIPS_CPU_RW_LLB; | |
49016748 | 521 | |
8b8a7634 RB |
522 | return config5 & MIPS_CONF_M; |
523 | } | |
524 | ||
078a55fc | 525 | static void decode_configs(struct cpuinfo_mips *c) |
2fa36399 KC |
526 | { |
527 | int ok; | |
528 | ||
529 | /* MIPS32 or MIPS64 compliant CPU. */ | |
530 | c->options = MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE | MIPS_CPU_COUNTER | | |
531 | MIPS_CPU_DIVEC | MIPS_CPU_LLSC | MIPS_CPU_MCHECK; | |
532 | ||
533 | c->scache.flags = MIPS_CACHE_NOT_PRESENT; | |
534 | ||
97f4ad29 MC |
535 | /* Enable FTLB if present and not disabled */ |
536 | set_ftlb_enable(c, !mips_ftlb_disabled); | |
75b5b5e0 | 537 | |
2fa36399 | 538 | ok = decode_config0(c); /* Read Config registers. */ |
70342287 | 539 | BUG_ON(!ok); /* Arch spec violation! */ |
2fa36399 KC |
540 | if (ok) |
541 | ok = decode_config1(c); | |
542 | if (ok) | |
543 | ok = decode_config2(c); | |
544 | if (ok) | |
545 | ok = decode_config3(c); | |
546 | if (ok) | |
547 | ok = decode_config4(c); | |
8b8a7634 RB |
548 | if (ok) |
549 | ok = decode_config5(c); | |
2fa36399 KC |
550 | |
551 | mips_probe_watch_registers(c); | |
552 | ||
6575b1d4 LY |
553 | if (cpu_has_rixi) { |
554 | /* Enable the RIXI exceptions */ | |
a5770df0 | 555 | set_c0_pagegrain(PG_IEC); |
6575b1d4 LY |
556 | back_to_back_c0_hazard(); |
557 | /* Verify the IEC bit is set */ | |
558 | if (read_c0_pagegrain() & PG_IEC) | |
559 | c->options |= MIPS_CPU_RIXIEX; | |
560 | } | |
561 | ||
0ee958e1 | 562 | #ifndef CONFIG_MIPS_CPS |
8b8aa636 | 563 | if (cpu_has_mips_r2_r6) { |
45b585c8 | 564 | c->core = get_ebase_cpunum(); |
30ee615b PB |
565 | if (cpu_has_mipsmt) |
566 | c->core >>= fls(core_nvpes()) - 1; | |
567 | } | |
0ee958e1 | 568 | #endif |
2fa36399 KC |
569 | } |
570 | ||
02cf2119 | 571 | #define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \ |
1da177e4 LT |
572 | | MIPS_CPU_COUNTER) |
573 | ||
cea7e2df | 574 | static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 575 | { |
8ff374b9 | 576 | switch (c->processor_id & PRID_IMP_MASK) { |
1da177e4 LT |
577 | case PRID_IMP_R2000: |
578 | c->cputype = CPU_R2000; | |
cea7e2df | 579 | __cpu_name[cpu] = "R2000"; |
02cf2119 | 580 | c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE | |
03751e79 | 581 | MIPS_CPU_NOFPUEX; |
1da177e4 LT |
582 | if (__cpu_has_fpu()) |
583 | c->options |= MIPS_CPU_FPU; | |
584 | c->tlbsize = 64; | |
585 | break; | |
586 | case PRID_IMP_R3000: | |
8ff374b9 | 587 | if ((c->processor_id & PRID_REV_MASK) == PRID_REV_R3000A) { |
cea7e2df | 588 | if (cpu_has_confreg()) { |
1da177e4 | 589 | c->cputype = CPU_R3081E; |
cea7e2df RB |
590 | __cpu_name[cpu] = "R3081"; |
591 | } else { | |
1da177e4 | 592 | c->cputype = CPU_R3000A; |
cea7e2df RB |
593 | __cpu_name[cpu] = "R3000A"; |
594 | } | |
cea7e2df | 595 | } else { |
1da177e4 | 596 | c->cputype = CPU_R3000; |
cea7e2df RB |
597 | __cpu_name[cpu] = "R3000"; |
598 | } | |
02cf2119 | 599 | c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE | |
03751e79 | 600 | MIPS_CPU_NOFPUEX; |
1da177e4 LT |
601 | if (__cpu_has_fpu()) |
602 | c->options |= MIPS_CPU_FPU; | |
603 | c->tlbsize = 64; | |
604 | break; | |
605 | case PRID_IMP_R4000: | |
606 | if (read_c0_config() & CONF_SC) { | |
8ff374b9 MR |
607 | if ((c->processor_id & PRID_REV_MASK) >= |
608 | PRID_REV_R4400) { | |
1da177e4 | 609 | c->cputype = CPU_R4400PC; |
cea7e2df RB |
610 | __cpu_name[cpu] = "R4400PC"; |
611 | } else { | |
1da177e4 | 612 | c->cputype = CPU_R4000PC; |
cea7e2df RB |
613 | __cpu_name[cpu] = "R4000PC"; |
614 | } | |
1da177e4 | 615 | } else { |
7f177a52 MR |
616 | int cca = read_c0_config() & CONF_CM_CMASK; |
617 | int mc; | |
618 | ||
619 | /* | |
620 | * SC and MC versions can't be reliably told apart, | |
621 | * but only the latter support coherent caching | |
622 | * modes so assume the firmware has set the KSEG0 | |
623 | * coherency attribute reasonably (if uncached, we | |
624 | * assume SC). | |
625 | */ | |
626 | switch (cca) { | |
627 | case CONF_CM_CACHABLE_CE: | |
628 | case CONF_CM_CACHABLE_COW: | |
629 | case CONF_CM_CACHABLE_CUW: | |
630 | mc = 1; | |
631 | break; | |
632 | default: | |
633 | mc = 0; | |
634 | break; | |
635 | } | |
8ff374b9 MR |
636 | if ((c->processor_id & PRID_REV_MASK) >= |
637 | PRID_REV_R4400) { | |
7f177a52 MR |
638 | c->cputype = mc ? CPU_R4400MC : CPU_R4400SC; |
639 | __cpu_name[cpu] = mc ? "R4400MC" : "R4400SC"; | |
cea7e2df | 640 | } else { |
7f177a52 MR |
641 | c->cputype = mc ? CPU_R4000MC : CPU_R4000SC; |
642 | __cpu_name[cpu] = mc ? "R4000MC" : "R4000SC"; | |
cea7e2df | 643 | } |
1da177e4 LT |
644 | } |
645 | ||
a96102be | 646 | set_isa(c, MIPS_CPU_ISA_III); |
1da177e4 | 647 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 SH |
648 | MIPS_CPU_WATCH | MIPS_CPU_VCE | |
649 | MIPS_CPU_LLSC; | |
1da177e4 LT |
650 | c->tlbsize = 48; |
651 | break; | |
652 | case PRID_IMP_VR41XX: | |
9f91e506 YY |
653 | set_isa(c, MIPS_CPU_ISA_III); |
654 | c->options = R4K_OPTS; | |
655 | c->tlbsize = 32; | |
1da177e4 | 656 | switch (c->processor_id & 0xf0) { |
1da177e4 LT |
657 | case PRID_REV_VR4111: |
658 | c->cputype = CPU_VR4111; | |
cea7e2df | 659 | __cpu_name[cpu] = "NEC VR4111"; |
1da177e4 | 660 | break; |
1da177e4 LT |
661 | case PRID_REV_VR4121: |
662 | c->cputype = CPU_VR4121; | |
cea7e2df | 663 | __cpu_name[cpu] = "NEC VR4121"; |
1da177e4 LT |
664 | break; |
665 | case PRID_REV_VR4122: | |
cea7e2df | 666 | if ((c->processor_id & 0xf) < 0x3) { |
1da177e4 | 667 | c->cputype = CPU_VR4122; |
cea7e2df RB |
668 | __cpu_name[cpu] = "NEC VR4122"; |
669 | } else { | |
1da177e4 | 670 | c->cputype = CPU_VR4181A; |
cea7e2df RB |
671 | __cpu_name[cpu] = "NEC VR4181A"; |
672 | } | |
1da177e4 LT |
673 | break; |
674 | case PRID_REV_VR4130: | |
cea7e2df | 675 | if ((c->processor_id & 0xf) < 0x4) { |
1da177e4 | 676 | c->cputype = CPU_VR4131; |
cea7e2df RB |
677 | __cpu_name[cpu] = "NEC VR4131"; |
678 | } else { | |
1da177e4 | 679 | c->cputype = CPU_VR4133; |
9f91e506 | 680 | c->options |= MIPS_CPU_LLSC; |
cea7e2df RB |
681 | __cpu_name[cpu] = "NEC VR4133"; |
682 | } | |
1da177e4 LT |
683 | break; |
684 | default: | |
685 | printk(KERN_INFO "Unexpected CPU of NEC VR4100 series\n"); | |
686 | c->cputype = CPU_VR41XX; | |
cea7e2df | 687 | __cpu_name[cpu] = "NEC Vr41xx"; |
1da177e4 LT |
688 | break; |
689 | } | |
1da177e4 LT |
690 | break; |
691 | case PRID_IMP_R4300: | |
692 | c->cputype = CPU_R4300; | |
cea7e2df | 693 | __cpu_name[cpu] = "R4300"; |
a96102be | 694 | set_isa(c, MIPS_CPU_ISA_III); |
1da177e4 | 695 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 696 | MIPS_CPU_LLSC; |
1da177e4 LT |
697 | c->tlbsize = 32; |
698 | break; | |
699 | case PRID_IMP_R4600: | |
700 | c->cputype = CPU_R4600; | |
cea7e2df | 701 | __cpu_name[cpu] = "R4600"; |
a96102be | 702 | set_isa(c, MIPS_CPU_ISA_III); |
075e7502 TS |
703 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
704 | MIPS_CPU_LLSC; | |
1da177e4 LT |
705 | c->tlbsize = 48; |
706 | break; | |
707 | #if 0 | |
03751e79 | 708 | case PRID_IMP_R4650: |
1da177e4 LT |
709 | /* |
710 | * This processor doesn't have an MMU, so it's not | |
711 | * "real easy" to run Linux on it. It is left purely | |
712 | * for documentation. Commented out because it shares | |
713 | * it's c0_prid id number with the TX3900. | |
714 | */ | |
a3dddd56 | 715 | c->cputype = CPU_R4650; |
cea7e2df | 716 | __cpu_name[cpu] = "R4650"; |
a96102be | 717 | set_isa(c, MIPS_CPU_ISA_III); |
1da177e4 | 718 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_LLSC; |
03751e79 | 719 | c->tlbsize = 48; |
1da177e4 LT |
720 | break; |
721 | #endif | |
722 | case PRID_IMP_TX39: | |
02cf2119 | 723 | c->options = MIPS_CPU_TLB | MIPS_CPU_TX39_CACHE; |
1da177e4 LT |
724 | |
725 | if ((c->processor_id & 0xf0) == (PRID_REV_TX3927 & 0xf0)) { | |
726 | c->cputype = CPU_TX3927; | |
cea7e2df | 727 | __cpu_name[cpu] = "TX3927"; |
1da177e4 LT |
728 | c->tlbsize = 64; |
729 | } else { | |
8ff374b9 | 730 | switch (c->processor_id & PRID_REV_MASK) { |
1da177e4 LT |
731 | case PRID_REV_TX3912: |
732 | c->cputype = CPU_TX3912; | |
cea7e2df | 733 | __cpu_name[cpu] = "TX3912"; |
1da177e4 LT |
734 | c->tlbsize = 32; |
735 | break; | |
736 | case PRID_REV_TX3922: | |
737 | c->cputype = CPU_TX3922; | |
cea7e2df | 738 | __cpu_name[cpu] = "TX3922"; |
1da177e4 LT |
739 | c->tlbsize = 64; |
740 | break; | |
1da177e4 LT |
741 | } |
742 | } | |
743 | break; | |
744 | case PRID_IMP_R4700: | |
745 | c->cputype = CPU_R4700; | |
cea7e2df | 746 | __cpu_name[cpu] = "R4700"; |
a96102be | 747 | set_isa(c, MIPS_CPU_ISA_III); |
1da177e4 | 748 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 749 | MIPS_CPU_LLSC; |
1da177e4 LT |
750 | c->tlbsize = 48; |
751 | break; | |
752 | case PRID_IMP_TX49: | |
753 | c->cputype = CPU_TX49XX; | |
cea7e2df | 754 | __cpu_name[cpu] = "R49XX"; |
a96102be | 755 | set_isa(c, MIPS_CPU_ISA_III); |
1da177e4 LT |
756 | c->options = R4K_OPTS | MIPS_CPU_LLSC; |
757 | if (!(c->processor_id & 0x08)) | |
758 | c->options |= MIPS_CPU_FPU | MIPS_CPU_32FPR; | |
759 | c->tlbsize = 48; | |
760 | break; | |
761 | case PRID_IMP_R5000: | |
762 | c->cputype = CPU_R5000; | |
cea7e2df | 763 | __cpu_name[cpu] = "R5000"; |
a96102be | 764 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 765 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 766 | MIPS_CPU_LLSC; |
1da177e4 LT |
767 | c->tlbsize = 48; |
768 | break; | |
769 | case PRID_IMP_R5432: | |
770 | c->cputype = CPU_R5432; | |
cea7e2df | 771 | __cpu_name[cpu] = "R5432"; |
a96102be | 772 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 773 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 774 | MIPS_CPU_WATCH | MIPS_CPU_LLSC; |
1da177e4 LT |
775 | c->tlbsize = 48; |
776 | break; | |
777 | case PRID_IMP_R5500: | |
778 | c->cputype = CPU_R5500; | |
cea7e2df | 779 | __cpu_name[cpu] = "R5500"; |
a96102be | 780 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 781 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 782 | MIPS_CPU_WATCH | MIPS_CPU_LLSC; |
1da177e4 LT |
783 | c->tlbsize = 48; |
784 | break; | |
785 | case PRID_IMP_NEVADA: | |
786 | c->cputype = CPU_NEVADA; | |
cea7e2df | 787 | __cpu_name[cpu] = "Nevada"; |
a96102be | 788 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 789 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 790 | MIPS_CPU_DIVEC | MIPS_CPU_LLSC; |
1da177e4 LT |
791 | c->tlbsize = 48; |
792 | break; | |
793 | case PRID_IMP_R6000: | |
794 | c->cputype = CPU_R6000; | |
cea7e2df | 795 | __cpu_name[cpu] = "R6000"; |
a96102be | 796 | set_isa(c, MIPS_CPU_ISA_II); |
1da177e4 | 797 | c->options = MIPS_CPU_TLB | MIPS_CPU_FPU | |
03751e79 | 798 | MIPS_CPU_LLSC; |
1da177e4 LT |
799 | c->tlbsize = 32; |
800 | break; | |
801 | case PRID_IMP_R6000A: | |
802 | c->cputype = CPU_R6000A; | |
cea7e2df | 803 | __cpu_name[cpu] = "R6000A"; |
a96102be | 804 | set_isa(c, MIPS_CPU_ISA_II); |
1da177e4 | 805 | c->options = MIPS_CPU_TLB | MIPS_CPU_FPU | |
03751e79 | 806 | MIPS_CPU_LLSC; |
1da177e4 LT |
807 | c->tlbsize = 32; |
808 | break; | |
809 | case PRID_IMP_RM7000: | |
810 | c->cputype = CPU_RM7000; | |
cea7e2df | 811 | __cpu_name[cpu] = "RM7000"; |
a96102be | 812 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 813 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 814 | MIPS_CPU_LLSC; |
1da177e4 | 815 | /* |
70342287 | 816 | * Undocumented RM7000: Bit 29 in the info register of |
1da177e4 LT |
817 | * the RM7000 v2.0 indicates if the TLB has 48 or 64 |
818 | * entries. | |
819 | * | |
70342287 RB |
820 | * 29 1 => 64 entry JTLB |
821 | * 0 => 48 entry JTLB | |
1da177e4 LT |
822 | */ |
823 | c->tlbsize = (read_c0_info() & (1 << 29)) ? 64 : 48; | |
1da177e4 LT |
824 | break; |
825 | case PRID_IMP_R8000: | |
826 | c->cputype = CPU_R8000; | |
cea7e2df | 827 | __cpu_name[cpu] = "RM8000"; |
a96102be | 828 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 829 | c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX | |
03751e79 SH |
830 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
831 | MIPS_CPU_LLSC; | |
1da177e4 LT |
832 | c->tlbsize = 384; /* has weird TLB: 3-way x 128 */ |
833 | break; | |
834 | case PRID_IMP_R10000: | |
835 | c->cputype = CPU_R10000; | |
cea7e2df | 836 | __cpu_name[cpu] = "R10000"; |
a96102be | 837 | set_isa(c, MIPS_CPU_ISA_IV); |
8b36612a | 838 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | |
03751e79 | 839 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
1da177e4 | 840 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | |
03751e79 | 841 | MIPS_CPU_LLSC; |
1da177e4 LT |
842 | c->tlbsize = 64; |
843 | break; | |
844 | case PRID_IMP_R12000: | |
845 | c->cputype = CPU_R12000; | |
cea7e2df | 846 | __cpu_name[cpu] = "R12000"; |
a96102be | 847 | set_isa(c, MIPS_CPU_ISA_IV); |
8b36612a | 848 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | |
03751e79 | 849 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
1da177e4 | 850 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | |
03751e79 | 851 | MIPS_CPU_LLSC; |
1da177e4 LT |
852 | c->tlbsize = 64; |
853 | break; | |
44d921b2 K |
854 | case PRID_IMP_R14000: |
855 | c->cputype = CPU_R14000; | |
cea7e2df | 856 | __cpu_name[cpu] = "R14000"; |
a96102be | 857 | set_isa(c, MIPS_CPU_ISA_IV); |
44d921b2 | 858 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | |
03751e79 | 859 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
44d921b2 | 860 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | |
03751e79 | 861 | MIPS_CPU_LLSC; |
44d921b2 K |
862 | c->tlbsize = 64; |
863 | break; | |
26859198 | 864 | case PRID_IMP_LOONGSON_64: /* Loongson-2/3 */ |
5aac1e8a RM |
865 | switch (c->processor_id & PRID_REV_MASK) { |
866 | case PRID_REV_LOONGSON2E: | |
c579d310 HC |
867 | c->cputype = CPU_LOONGSON2; |
868 | __cpu_name[cpu] = "ICT Loongson-2"; | |
5aac1e8a | 869 | set_elf_platform(cpu, "loongson2e"); |
7352c8b1 | 870 | set_isa(c, MIPS_CPU_ISA_III); |
5aac1e8a RM |
871 | break; |
872 | case PRID_REV_LOONGSON2F: | |
c579d310 HC |
873 | c->cputype = CPU_LOONGSON2; |
874 | __cpu_name[cpu] = "ICT Loongson-2"; | |
5aac1e8a | 875 | set_elf_platform(cpu, "loongson2f"); |
7352c8b1 | 876 | set_isa(c, MIPS_CPU_ISA_III); |
5aac1e8a | 877 | break; |
c579d310 HC |
878 | case PRID_REV_LOONGSON3A: |
879 | c->cputype = CPU_LOONGSON3; | |
880 | __cpu_name[cpu] = "ICT Loongson-3"; | |
881 | set_elf_platform(cpu, "loongson3a"); | |
7352c8b1 | 882 | set_isa(c, MIPS_CPU_ISA_M64R1); |
c579d310 | 883 | break; |
e7841be5 HC |
884 | case PRID_REV_LOONGSON3B_R1: |
885 | case PRID_REV_LOONGSON3B_R2: | |
886 | c->cputype = CPU_LOONGSON3; | |
887 | __cpu_name[cpu] = "ICT Loongson-3"; | |
888 | set_elf_platform(cpu, "loongson3b"); | |
7352c8b1 | 889 | set_isa(c, MIPS_CPU_ISA_M64R1); |
e7841be5 | 890 | break; |
5aac1e8a RM |
891 | } |
892 | ||
2a21c730 FZ |
893 | c->options = R4K_OPTS | |
894 | MIPS_CPU_FPU | MIPS_CPU_LLSC | | |
895 | MIPS_CPU_32FPR; | |
896 | c->tlbsize = 64; | |
cc94ea31 | 897 | c->writecombine = _CACHE_UNCACHED_ACCELERATED; |
2a21c730 | 898 | break; |
26859198 | 899 | case PRID_IMP_LOONGSON_32: /* Loongson-1 */ |
2fa36399 | 900 | decode_configs(c); |
b4672d37 | 901 | |
2fa36399 | 902 | c->cputype = CPU_LOONGSON1; |
1da177e4 | 903 | |
2fa36399 KC |
904 | switch (c->processor_id & PRID_REV_MASK) { |
905 | case PRID_REV_LOONGSON1B: | |
906 | __cpu_name[cpu] = "Loongson 1B"; | |
b4672d37 | 907 | break; |
b4672d37 | 908 | } |
4194318c | 909 | |
2fa36399 | 910 | break; |
1da177e4 | 911 | } |
1da177e4 LT |
912 | } |
913 | ||
cea7e2df | 914 | static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 915 | { |
4f12b91d | 916 | c->writecombine = _CACHE_UNCACHED_ACCELERATED; |
8ff374b9 | 917 | switch (c->processor_id & PRID_IMP_MASK) { |
b2498af5 LY |
918 | case PRID_IMP_QEMU_GENERIC: |
919 | c->writecombine = _CACHE_UNCACHED; | |
920 | c->cputype = CPU_QEMU_GENERIC; | |
921 | __cpu_name[cpu] = "MIPS GENERIC QEMU"; | |
922 | break; | |
1da177e4 LT |
923 | case PRID_IMP_4KC: |
924 | c->cputype = CPU_4KC; | |
4f12b91d | 925 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 926 | __cpu_name[cpu] = "MIPS 4Kc"; |
1da177e4 LT |
927 | break; |
928 | case PRID_IMP_4KEC: | |
2b07bd02 RB |
929 | case PRID_IMP_4KECR2: |
930 | c->cputype = CPU_4KEC; | |
4f12b91d | 931 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 932 | __cpu_name[cpu] = "MIPS 4KEc"; |
2b07bd02 | 933 | break; |
1da177e4 | 934 | case PRID_IMP_4KSC: |
8afcb5d8 | 935 | case PRID_IMP_4KSD: |
1da177e4 | 936 | c->cputype = CPU_4KSC; |
4f12b91d | 937 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 938 | __cpu_name[cpu] = "MIPS 4KSc"; |
1da177e4 LT |
939 | break; |
940 | case PRID_IMP_5KC: | |
941 | c->cputype = CPU_5KC; | |
4f12b91d | 942 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 943 | __cpu_name[cpu] = "MIPS 5Kc"; |
1da177e4 | 944 | break; |
78d4803f LY |
945 | case PRID_IMP_5KE: |
946 | c->cputype = CPU_5KE; | |
4f12b91d | 947 | c->writecombine = _CACHE_UNCACHED; |
78d4803f LY |
948 | __cpu_name[cpu] = "MIPS 5KE"; |
949 | break; | |
1da177e4 LT |
950 | case PRID_IMP_20KC: |
951 | c->cputype = CPU_20KC; | |
4f12b91d | 952 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 953 | __cpu_name[cpu] = "MIPS 20Kc"; |
1da177e4 LT |
954 | break; |
955 | case PRID_IMP_24K: | |
956 | c->cputype = CPU_24K; | |
4f12b91d | 957 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 958 | __cpu_name[cpu] = "MIPS 24Kc"; |
1da177e4 | 959 | break; |
42f3caef JC |
960 | case PRID_IMP_24KE: |
961 | c->cputype = CPU_24K; | |
4f12b91d | 962 | c->writecombine = _CACHE_UNCACHED; |
42f3caef JC |
963 | __cpu_name[cpu] = "MIPS 24KEc"; |
964 | break; | |
1da177e4 LT |
965 | case PRID_IMP_25KF: |
966 | c->cputype = CPU_25KF; | |
4f12b91d | 967 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 968 | __cpu_name[cpu] = "MIPS 25Kc"; |
1da177e4 | 969 | break; |
bbc7f22f RB |
970 | case PRID_IMP_34K: |
971 | c->cputype = CPU_34K; | |
4f12b91d | 972 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 973 | __cpu_name[cpu] = "MIPS 34Kc"; |
bbc7f22f | 974 | break; |
c620953c CD |
975 | case PRID_IMP_74K: |
976 | c->cputype = CPU_74K; | |
4f12b91d | 977 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 978 | __cpu_name[cpu] = "MIPS 74Kc"; |
c620953c | 979 | break; |
113c62d9 SH |
980 | case PRID_IMP_M14KC: |
981 | c->cputype = CPU_M14KC; | |
4f12b91d | 982 | c->writecombine = _CACHE_UNCACHED; |
113c62d9 SH |
983 | __cpu_name[cpu] = "MIPS M14Kc"; |
984 | break; | |
f8fa4811 SH |
985 | case PRID_IMP_M14KEC: |
986 | c->cputype = CPU_M14KEC; | |
4f12b91d | 987 | c->writecombine = _CACHE_UNCACHED; |
f8fa4811 SH |
988 | __cpu_name[cpu] = "MIPS M14KEc"; |
989 | break; | |
39b8d525 RB |
990 | case PRID_IMP_1004K: |
991 | c->cputype = CPU_1004K; | |
4f12b91d | 992 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 993 | __cpu_name[cpu] = "MIPS 1004Kc"; |
39b8d525 | 994 | break; |
006a851b | 995 | case PRID_IMP_1074K: |
442e14a2 | 996 | c->cputype = CPU_1074K; |
4f12b91d | 997 | c->writecombine = _CACHE_UNCACHED; |
006a851b SH |
998 | __cpu_name[cpu] = "MIPS 1074Kc"; |
999 | break; | |
b5f065e7 LY |
1000 | case PRID_IMP_INTERAPTIV_UP: |
1001 | c->cputype = CPU_INTERAPTIV; | |
1002 | __cpu_name[cpu] = "MIPS interAptiv"; | |
1003 | break; | |
1004 | case PRID_IMP_INTERAPTIV_MP: | |
1005 | c->cputype = CPU_INTERAPTIV; | |
1006 | __cpu_name[cpu] = "MIPS interAptiv (multi)"; | |
1007 | break; | |
b0d4d300 LY |
1008 | case PRID_IMP_PROAPTIV_UP: |
1009 | c->cputype = CPU_PROAPTIV; | |
1010 | __cpu_name[cpu] = "MIPS proAptiv"; | |
1011 | break; | |
1012 | case PRID_IMP_PROAPTIV_MP: | |
1013 | c->cputype = CPU_PROAPTIV; | |
1014 | __cpu_name[cpu] = "MIPS proAptiv (multi)"; | |
1015 | break; | |
829dcc0a JH |
1016 | case PRID_IMP_P5600: |
1017 | c->cputype = CPU_P5600; | |
1018 | __cpu_name[cpu] = "MIPS P5600"; | |
1019 | break; | |
9943ed92 LY |
1020 | case PRID_IMP_M5150: |
1021 | c->cputype = CPU_M5150; | |
1022 | __cpu_name[cpu] = "MIPS M5150"; | |
1023 | break; | |
1da177e4 | 1024 | } |
0b6d497f | 1025 | |
75b5b5e0 LY |
1026 | decode_configs(c); |
1027 | ||
0b6d497f | 1028 | spram_config(); |
1da177e4 LT |
1029 | } |
1030 | ||
cea7e2df | 1031 | static inline void cpu_probe_alchemy(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 1032 | { |
4194318c | 1033 | decode_configs(c); |
8ff374b9 | 1034 | switch (c->processor_id & PRID_IMP_MASK) { |
1da177e4 LT |
1035 | case PRID_IMP_AU1_REV1: |
1036 | case PRID_IMP_AU1_REV2: | |
270717a8 | 1037 | c->cputype = CPU_ALCHEMY; |
1da177e4 LT |
1038 | switch ((c->processor_id >> 24) & 0xff) { |
1039 | case 0: | |
cea7e2df | 1040 | __cpu_name[cpu] = "Au1000"; |
1da177e4 LT |
1041 | break; |
1042 | case 1: | |
cea7e2df | 1043 | __cpu_name[cpu] = "Au1500"; |
1da177e4 LT |
1044 | break; |
1045 | case 2: | |
cea7e2df | 1046 | __cpu_name[cpu] = "Au1100"; |
1da177e4 LT |
1047 | break; |
1048 | case 3: | |
cea7e2df | 1049 | __cpu_name[cpu] = "Au1550"; |
1da177e4 | 1050 | break; |
e3ad1c23 | 1051 | case 4: |
cea7e2df | 1052 | __cpu_name[cpu] = "Au1200"; |
8ff374b9 | 1053 | if ((c->processor_id & PRID_REV_MASK) == 2) |
cea7e2df | 1054 | __cpu_name[cpu] = "Au1250"; |
237cfee1 ML |
1055 | break; |
1056 | case 5: | |
cea7e2df | 1057 | __cpu_name[cpu] = "Au1210"; |
e3ad1c23 | 1058 | break; |
1da177e4 | 1059 | default: |
270717a8 | 1060 | __cpu_name[cpu] = "Au1xxx"; |
1da177e4 LT |
1061 | break; |
1062 | } | |
1da177e4 LT |
1063 | break; |
1064 | } | |
1065 | } | |
1066 | ||
cea7e2df | 1067 | static inline void cpu_probe_sibyte(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 1068 | { |
4194318c | 1069 | decode_configs(c); |
02cf2119 | 1070 | |
4f12b91d | 1071 | c->writecombine = _CACHE_UNCACHED_ACCELERATED; |
8ff374b9 | 1072 | switch (c->processor_id & PRID_IMP_MASK) { |
1da177e4 LT |
1073 | case PRID_IMP_SB1: |
1074 | c->cputype = CPU_SB1; | |
cea7e2df | 1075 | __cpu_name[cpu] = "SiByte SB1"; |
1da177e4 | 1076 | /* FPU in pass1 is known to have issues. */ |
8ff374b9 | 1077 | if ((c->processor_id & PRID_REV_MASK) < 0x02) |
010b853b | 1078 | c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR); |
1da177e4 | 1079 | break; |
93ce2f52 AI |
1080 | case PRID_IMP_SB1A: |
1081 | c->cputype = CPU_SB1A; | |
cea7e2df | 1082 | __cpu_name[cpu] = "SiByte SB1A"; |
93ce2f52 | 1083 | break; |
1da177e4 LT |
1084 | } |
1085 | } | |
1086 | ||
cea7e2df | 1087 | static inline void cpu_probe_sandcraft(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 1088 | { |
4194318c | 1089 | decode_configs(c); |
8ff374b9 | 1090 | switch (c->processor_id & PRID_IMP_MASK) { |
1da177e4 LT |
1091 | case PRID_IMP_SR71000: |
1092 | c->cputype = CPU_SR71000; | |
cea7e2df | 1093 | __cpu_name[cpu] = "Sandcraft SR71000"; |
1da177e4 LT |
1094 | c->scache.ways = 8; |
1095 | c->tlbsize = 64; | |
1096 | break; | |
1097 | } | |
1098 | } | |
1099 | ||
cea7e2df | 1100 | static inline void cpu_probe_nxp(struct cpuinfo_mips *c, unsigned int cpu) |
bdf21b18 PP |
1101 | { |
1102 | decode_configs(c); | |
8ff374b9 | 1103 | switch (c->processor_id & PRID_IMP_MASK) { |
bdf21b18 PP |
1104 | case PRID_IMP_PR4450: |
1105 | c->cputype = CPU_PR4450; | |
cea7e2df | 1106 | __cpu_name[cpu] = "Philips PR4450"; |
a96102be | 1107 | set_isa(c, MIPS_CPU_ISA_M32R1); |
bdf21b18 | 1108 | break; |
bdf21b18 PP |
1109 | } |
1110 | } | |
1111 | ||
cea7e2df | 1112 | static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu) |
1c0c13eb AJ |
1113 | { |
1114 | decode_configs(c); | |
8ff374b9 | 1115 | switch (c->processor_id & PRID_IMP_MASK) { |
190fca3e KC |
1116 | case PRID_IMP_BMIPS32_REV4: |
1117 | case PRID_IMP_BMIPS32_REV8: | |
602977b0 KC |
1118 | c->cputype = CPU_BMIPS32; |
1119 | __cpu_name[cpu] = "Broadcom BMIPS32"; | |
06785df0 | 1120 | set_elf_platform(cpu, "bmips32"); |
602977b0 KC |
1121 | break; |
1122 | case PRID_IMP_BMIPS3300: | |
1123 | case PRID_IMP_BMIPS3300_ALT: | |
1124 | case PRID_IMP_BMIPS3300_BUG: | |
1125 | c->cputype = CPU_BMIPS3300; | |
1126 | __cpu_name[cpu] = "Broadcom BMIPS3300"; | |
06785df0 | 1127 | set_elf_platform(cpu, "bmips3300"); |
602977b0 KC |
1128 | break; |
1129 | case PRID_IMP_BMIPS43XX: { | |
8ff374b9 | 1130 | int rev = c->processor_id & PRID_REV_MASK; |
602977b0 KC |
1131 | |
1132 | if (rev >= PRID_REV_BMIPS4380_LO && | |
1133 | rev <= PRID_REV_BMIPS4380_HI) { | |
1134 | c->cputype = CPU_BMIPS4380; | |
1135 | __cpu_name[cpu] = "Broadcom BMIPS4380"; | |
06785df0 | 1136 | set_elf_platform(cpu, "bmips4380"); |
602977b0 KC |
1137 | } else { |
1138 | c->cputype = CPU_BMIPS4350; | |
1139 | __cpu_name[cpu] = "Broadcom BMIPS4350"; | |
06785df0 | 1140 | set_elf_platform(cpu, "bmips4350"); |
602977b0 | 1141 | } |
0de663ef | 1142 | break; |
602977b0 KC |
1143 | } |
1144 | case PRID_IMP_BMIPS5000: | |
68e6a783 | 1145 | case PRID_IMP_BMIPS5200: |
602977b0 KC |
1146 | c->cputype = CPU_BMIPS5000; |
1147 | __cpu_name[cpu] = "Broadcom BMIPS5000"; | |
06785df0 | 1148 | set_elf_platform(cpu, "bmips5000"); |
602977b0 | 1149 | c->options |= MIPS_CPU_ULRI; |
0de663ef | 1150 | break; |
1c0c13eb AJ |
1151 | } |
1152 | } | |
1153 | ||
0dd4781b DD |
1154 | static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu) |
1155 | { | |
1156 | decode_configs(c); | |
8ff374b9 | 1157 | switch (c->processor_id & PRID_IMP_MASK) { |
0dd4781b DD |
1158 | case PRID_IMP_CAVIUM_CN38XX: |
1159 | case PRID_IMP_CAVIUM_CN31XX: | |
1160 | case PRID_IMP_CAVIUM_CN30XX: | |
6f329468 DD |
1161 | c->cputype = CPU_CAVIUM_OCTEON; |
1162 | __cpu_name[cpu] = "Cavium Octeon"; | |
1163 | goto platform; | |
0dd4781b DD |
1164 | case PRID_IMP_CAVIUM_CN58XX: |
1165 | case PRID_IMP_CAVIUM_CN56XX: | |
1166 | case PRID_IMP_CAVIUM_CN50XX: | |
1167 | case PRID_IMP_CAVIUM_CN52XX: | |
6f329468 DD |
1168 | c->cputype = CPU_CAVIUM_OCTEON_PLUS; |
1169 | __cpu_name[cpu] = "Cavium Octeon+"; | |
1170 | platform: | |
c094c99e | 1171 | set_elf_platform(cpu, "octeon"); |
0dd4781b | 1172 | break; |
a1431b61 | 1173 | case PRID_IMP_CAVIUM_CN61XX: |
0e56b385 | 1174 | case PRID_IMP_CAVIUM_CN63XX: |
a1431b61 DD |
1175 | case PRID_IMP_CAVIUM_CN66XX: |
1176 | case PRID_IMP_CAVIUM_CN68XX: | |
af04bb85 | 1177 | case PRID_IMP_CAVIUM_CNF71XX: |
0e56b385 DD |
1178 | c->cputype = CPU_CAVIUM_OCTEON2; |
1179 | __cpu_name[cpu] = "Cavium Octeon II"; | |
c094c99e | 1180 | set_elf_platform(cpu, "octeon2"); |
0e56b385 | 1181 | break; |
af04bb85 DD |
1182 | case PRID_IMP_CAVIUM_CN70XX: |
1183 | case PRID_IMP_CAVIUM_CN78XX: | |
1184 | c->cputype = CPU_CAVIUM_OCTEON3; | |
1185 | __cpu_name[cpu] = "Cavium Octeon III"; | |
1186 | set_elf_platform(cpu, "octeon3"); | |
1187 | break; | |
0dd4781b DD |
1188 | default: |
1189 | printk(KERN_INFO "Unknown Octeon chip!\n"); | |
1190 | c->cputype = CPU_UNKNOWN; | |
1191 | break; | |
1192 | } | |
1193 | } | |
1194 | ||
83ccf69d LPC |
1195 | static inline void cpu_probe_ingenic(struct cpuinfo_mips *c, unsigned int cpu) |
1196 | { | |
1197 | decode_configs(c); | |
1198 | /* JZRISC does not implement the CP0 counter. */ | |
1199 | c->options &= ~MIPS_CPU_COUNTER; | |
06947aaa | 1200 | BUG_ON(!__builtin_constant_p(cpu_has_counter) || cpu_has_counter); |
8ff374b9 | 1201 | switch (c->processor_id & PRID_IMP_MASK) { |
83ccf69d LPC |
1202 | case PRID_IMP_JZRISC: |
1203 | c->cputype = CPU_JZRISC; | |
4f12b91d | 1204 | c->writecombine = _CACHE_UNCACHED_ACCELERATED; |
83ccf69d LPC |
1205 | __cpu_name[cpu] = "Ingenic JZRISC"; |
1206 | break; | |
1207 | default: | |
1208 | panic("Unknown Ingenic Processor ID!"); | |
1209 | break; | |
1210 | } | |
1211 | } | |
1212 | ||
a7117c6b J |
1213 | static inline void cpu_probe_netlogic(struct cpuinfo_mips *c, int cpu) |
1214 | { | |
1215 | decode_configs(c); | |
1216 | ||
8ff374b9 | 1217 | if ((c->processor_id & PRID_IMP_MASK) == PRID_IMP_NETLOGIC_AU13XX) { |
809f36c6 ML |
1218 | c->cputype = CPU_ALCHEMY; |
1219 | __cpu_name[cpu] = "Au1300"; | |
1220 | /* following stuff is not for Alchemy */ | |
1221 | return; | |
1222 | } | |
1223 | ||
70342287 RB |
1224 | c->options = (MIPS_CPU_TLB | |
1225 | MIPS_CPU_4KEX | | |
a7117c6b | 1226 | MIPS_CPU_COUNTER | |
70342287 RB |
1227 | MIPS_CPU_DIVEC | |
1228 | MIPS_CPU_WATCH | | |
1229 | MIPS_CPU_EJTAG | | |
a7117c6b J |
1230 | MIPS_CPU_LLSC); |
1231 | ||
8ff374b9 | 1232 | switch (c->processor_id & PRID_IMP_MASK) { |
4ca86a2f | 1233 | case PRID_IMP_NETLOGIC_XLP2XX: |
8907c55e | 1234 | case PRID_IMP_NETLOGIC_XLP9XX: |
1c983986 | 1235 | case PRID_IMP_NETLOGIC_XLP5XX: |
4ca86a2f J |
1236 | c->cputype = CPU_XLP; |
1237 | __cpu_name[cpu] = "Broadcom XLPII"; | |
1238 | break; | |
1239 | ||
2aa54b20 J |
1240 | case PRID_IMP_NETLOGIC_XLP8XX: |
1241 | case PRID_IMP_NETLOGIC_XLP3XX: | |
a3d4fb2d J |
1242 | c->cputype = CPU_XLP; |
1243 | __cpu_name[cpu] = "Netlogic XLP"; | |
1244 | break; | |
1245 | ||
a7117c6b J |
1246 | case PRID_IMP_NETLOGIC_XLR732: |
1247 | case PRID_IMP_NETLOGIC_XLR716: | |
1248 | case PRID_IMP_NETLOGIC_XLR532: | |
1249 | case PRID_IMP_NETLOGIC_XLR308: | |
1250 | case PRID_IMP_NETLOGIC_XLR532C: | |
1251 | case PRID_IMP_NETLOGIC_XLR516C: | |
1252 | case PRID_IMP_NETLOGIC_XLR508C: | |
1253 | case PRID_IMP_NETLOGIC_XLR308C: | |
1254 | c->cputype = CPU_XLR; | |
1255 | __cpu_name[cpu] = "Netlogic XLR"; | |
1256 | break; | |
1257 | ||
1258 | case PRID_IMP_NETLOGIC_XLS608: | |
1259 | case PRID_IMP_NETLOGIC_XLS408: | |
1260 | case PRID_IMP_NETLOGIC_XLS404: | |
1261 | case PRID_IMP_NETLOGIC_XLS208: | |
1262 | case PRID_IMP_NETLOGIC_XLS204: | |
1263 | case PRID_IMP_NETLOGIC_XLS108: | |
1264 | case PRID_IMP_NETLOGIC_XLS104: | |
1265 | case PRID_IMP_NETLOGIC_XLS616B: | |
1266 | case PRID_IMP_NETLOGIC_XLS608B: | |
1267 | case PRID_IMP_NETLOGIC_XLS416B: | |
1268 | case PRID_IMP_NETLOGIC_XLS412B: | |
1269 | case PRID_IMP_NETLOGIC_XLS408B: | |
1270 | case PRID_IMP_NETLOGIC_XLS404B: | |
1271 | c->cputype = CPU_XLR; | |
1272 | __cpu_name[cpu] = "Netlogic XLS"; | |
1273 | break; | |
1274 | ||
1275 | default: | |
a3d4fb2d | 1276 | pr_info("Unknown Netlogic chip id [%02x]!\n", |
a7117c6b J |
1277 | c->processor_id); |
1278 | c->cputype = CPU_XLR; | |
1279 | break; | |
1280 | } | |
1281 | ||
a3d4fb2d | 1282 | if (c->cputype == CPU_XLP) { |
a96102be | 1283 | set_isa(c, MIPS_CPU_ISA_M64R2); |
a3d4fb2d J |
1284 | c->options |= (MIPS_CPU_FPU | MIPS_CPU_ULRI | MIPS_CPU_MCHECK); |
1285 | /* This will be updated again after all threads are woken up */ | |
1286 | c->tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1; | |
1287 | } else { | |
a96102be | 1288 | set_isa(c, MIPS_CPU_ISA_M64R1); |
a3d4fb2d J |
1289 | c->tlbsize = ((read_c0_config1() >> 25) & 0x3f) + 1; |
1290 | } | |
7777b939 | 1291 | c->kscratch_mask = 0xf; |
a7117c6b J |
1292 | } |
1293 | ||
949e51be DD |
1294 | #ifdef CONFIG_64BIT |
1295 | /* For use by uaccess.h */ | |
1296 | u64 __ua_limit; | |
1297 | EXPORT_SYMBOL(__ua_limit); | |
1298 | #endif | |
1299 | ||
9966db25 | 1300 | const char *__cpu_name[NR_CPUS]; |
874fd3b5 | 1301 | const char *__elf_platform; |
9966db25 | 1302 | |
078a55fc | 1303 | void cpu_probe(void) |
1da177e4 LT |
1304 | { |
1305 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
9966db25 | 1306 | unsigned int cpu = smp_processor_id(); |
1da177e4 | 1307 | |
70342287 | 1308 | c->processor_id = PRID_IMP_UNKNOWN; |
1da177e4 LT |
1309 | c->fpu_id = FPIR_IMP_NONE; |
1310 | c->cputype = CPU_UNKNOWN; | |
4f12b91d | 1311 | c->writecombine = _CACHE_UNCACHED; |
1da177e4 LT |
1312 | |
1313 | c->processor_id = read_c0_prid(); | |
8ff374b9 | 1314 | switch (c->processor_id & PRID_COMP_MASK) { |
1da177e4 | 1315 | case PRID_COMP_LEGACY: |
cea7e2df | 1316 | cpu_probe_legacy(c, cpu); |
1da177e4 LT |
1317 | break; |
1318 | case PRID_COMP_MIPS: | |
cea7e2df | 1319 | cpu_probe_mips(c, cpu); |
1da177e4 LT |
1320 | break; |
1321 | case PRID_COMP_ALCHEMY: | |
cea7e2df | 1322 | cpu_probe_alchemy(c, cpu); |
1da177e4 LT |
1323 | break; |
1324 | case PRID_COMP_SIBYTE: | |
cea7e2df | 1325 | cpu_probe_sibyte(c, cpu); |
1da177e4 | 1326 | break; |
1c0c13eb | 1327 | case PRID_COMP_BROADCOM: |
cea7e2df | 1328 | cpu_probe_broadcom(c, cpu); |
1c0c13eb | 1329 | break; |
1da177e4 | 1330 | case PRID_COMP_SANDCRAFT: |
cea7e2df | 1331 | cpu_probe_sandcraft(c, cpu); |
1da177e4 | 1332 | break; |
a92b0588 | 1333 | case PRID_COMP_NXP: |
cea7e2df | 1334 | cpu_probe_nxp(c, cpu); |
a3dddd56 | 1335 | break; |
0dd4781b DD |
1336 | case PRID_COMP_CAVIUM: |
1337 | cpu_probe_cavium(c, cpu); | |
1338 | break; | |
83ccf69d LPC |
1339 | case PRID_COMP_INGENIC: |
1340 | cpu_probe_ingenic(c, cpu); | |
1341 | break; | |
a7117c6b J |
1342 | case PRID_COMP_NETLOGIC: |
1343 | cpu_probe_netlogic(c, cpu); | |
1344 | break; | |
1da177e4 | 1345 | } |
dec8b1ca | 1346 | |
cea7e2df RB |
1347 | BUG_ON(!__cpu_name[cpu]); |
1348 | BUG_ON(c->cputype == CPU_UNKNOWN); | |
1349 | ||
dec8b1ca FBH |
1350 | /* |
1351 | * Platform code can force the cpu type to optimize code | |
1352 | * generation. In that case be sure the cpu type is correctly | |
1353 | * manually setup otherwise it could trigger some nasty bugs. | |
1354 | */ | |
1355 | BUG_ON(current_cpu_type() != c->cputype); | |
1356 | ||
0103d23f KC |
1357 | if (mips_fpu_disabled) |
1358 | c->options &= ~MIPS_CPU_FPU; | |
1359 | ||
1360 | if (mips_dsp_disabled) | |
ee80f7c7 | 1361 | c->ases &= ~(MIPS_ASE_DSP | MIPS_ASE_DSP2P); |
0103d23f | 1362 | |
3d528b32 MC |
1363 | if (mips_htw_disabled) { |
1364 | c->options &= ~MIPS_CPU_HTW; | |
1365 | write_c0_pwctl(read_c0_pwctl() & | |
1366 | ~(1 << MIPS_PWCTL_PWEN_SHIFT)); | |
1367 | } | |
1368 | ||
4194318c | 1369 | if (c->options & MIPS_CPU_FPU) { |
1da177e4 | 1370 | c->fpu_id = cpu_get_fpu_id(); |
4194318c | 1371 | |
8b8aa636 | 1372 | if (c->isa_level & cpu_has_mips_r) { |
4194318c RB |
1373 | if (c->fpu_id & MIPS_FPIR_3D) |
1374 | c->ases |= MIPS_ASE_MIPS3D; | |
adac5d53 PB |
1375 | if (c->fpu_id & MIPS_FPIR_FREP) |
1376 | c->options |= MIPS_CPU_FRE; | |
4194318c RB |
1377 | } |
1378 | } | |
9966db25 | 1379 | |
8b8aa636 | 1380 | if (cpu_has_mips_r2_r6) { |
f6771dbb | 1381 | c->srsets = ((read_c0_srsctl() >> 26) & 0x0f) + 1; |
da4b62cd AC |
1382 | /* R2 has Performance Counter Interrupt indicator */ |
1383 | c->options |= MIPS_CPU_PCI; | |
1384 | } | |
f6771dbb RB |
1385 | else |
1386 | c->srsets = 1; | |
91dfc423 | 1387 | |
a8ad1367 | 1388 | if (cpu_has_msa) { |
a5e9a69e | 1389 | c->msa_id = cpu_get_msa_id(); |
a8ad1367 PB |
1390 | WARN(c->msa_id & MSA_IR_WRPF, |
1391 | "Vector register partitioning unimplemented!"); | |
1392 | } | |
a5e9a69e | 1393 | |
91dfc423 | 1394 | cpu_probe_vmbits(c); |
949e51be DD |
1395 | |
1396 | #ifdef CONFIG_64BIT | |
1397 | if (cpu == 0) | |
1398 | __ua_limit = ~((1ull << cpu_vmbits) - 1); | |
1399 | #endif | |
1da177e4 LT |
1400 | } |
1401 | ||
078a55fc | 1402 | void cpu_report(void) |
1da177e4 LT |
1403 | { |
1404 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1405 | ||
d9f897c9 LY |
1406 | pr_info("CPU%d revision is: %08x (%s)\n", |
1407 | smp_processor_id(), c->processor_id, cpu_name_string()); | |
1da177e4 | 1408 | if (c->options & MIPS_CPU_FPU) |
9966db25 | 1409 | printk(KERN_INFO "FPU revision is: %08x\n", c->fpu_id); |
a5e9a69e PB |
1410 | if (cpu_has_msa) |
1411 | pr_info("MSA revision is: %08x\n", c->msa_id); | |
1da177e4 | 1412 | } |