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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> |
f6843626 | 23 | #include <asm/cpu-features.h> |
69f24d17 | 24 | #include <asm/cpu-type.h> |
1da177e4 LT |
25 | #include <asm/fpu.h> |
26 | #include <asm/mipsregs.h> | |
30ee615b | 27 | #include <asm/mipsmtregs.h> |
a5e9a69e | 28 | #include <asm/msa.h> |
654f57bf | 29 | #include <asm/watch.h> |
06372a63 | 30 | #include <asm/elf.h> |
4f12b91d | 31 | #include <asm/pgtable-bits.h> |
a074f0e8 | 32 | #include <asm/spram.h> |
949e51be DD |
33 | #include <asm/uaccess.h> |
34 | ||
e14f1db7 PB |
35 | /* Hardware capabilities */ |
36 | unsigned int elf_hwcap __read_mostly; | |
37 | ||
7aecd5ca MR |
38 | /* |
39 | * Get the FPU Implementation/Revision. | |
40 | */ | |
41 | static inline unsigned long cpu_get_fpu_id(void) | |
42 | { | |
43 | unsigned long tmp, fpu_id; | |
44 | ||
45 | tmp = read_c0_status(); | |
46 | __enable_fpu(FPU_AS_IS); | |
47 | fpu_id = read_32bit_cp1_register(CP1_REVISION); | |
48 | write_c0_status(tmp); | |
49 | return fpu_id; | |
50 | } | |
51 | ||
52 | /* | |
53 | * Check if the CPU has an external FPU. | |
54 | */ | |
55 | static inline int __cpu_has_fpu(void) | |
56 | { | |
57 | return (cpu_get_fpu_id() & FPIR_IMP_MASK) != FPIR_IMP_NONE; | |
58 | } | |
59 | ||
60 | static inline unsigned long cpu_get_msa_id(void) | |
61 | { | |
62 | unsigned long status, msa_id; | |
63 | ||
64 | status = read_c0_status(); | |
65 | __enable_fpu(FPU_64BIT); | |
66 | enable_msa(); | |
67 | msa_id = read_msa_ir(); | |
68 | disable_msa(); | |
69 | write_c0_status(status); | |
70 | return msa_id; | |
71 | } | |
72 | ||
9b26616c MR |
73 | /* |
74 | * Determine the FCSR mask for FPU hardware. | |
75 | */ | |
76 | static inline void cpu_set_fpu_fcsr_mask(struct cpuinfo_mips *c) | |
77 | { | |
78 | unsigned long sr, mask, fcsr, fcsr0, fcsr1; | |
79 | ||
90b712dd | 80 | fcsr = c->fpu_csr31; |
9b26616c MR |
81 | mask = FPU_CSR_ALL_X | FPU_CSR_ALL_E | FPU_CSR_ALL_S | FPU_CSR_RM; |
82 | ||
83 | sr = read_c0_status(); | |
84 | __enable_fpu(FPU_AS_IS); | |
85 | ||
9b26616c MR |
86 | fcsr0 = fcsr & mask; |
87 | write_32bit_cp1_register(CP1_STATUS, fcsr0); | |
88 | fcsr0 = read_32bit_cp1_register(CP1_STATUS); | |
89 | ||
90 | fcsr1 = fcsr | ~mask; | |
91 | write_32bit_cp1_register(CP1_STATUS, fcsr1); | |
92 | fcsr1 = read_32bit_cp1_register(CP1_STATUS); | |
93 | ||
94 | write_32bit_cp1_register(CP1_STATUS, fcsr); | |
95 | ||
96 | write_c0_status(sr); | |
97 | ||
98 | c->fpu_msk31 = ~(fcsr0 ^ fcsr1) & ~mask; | |
99 | } | |
100 | ||
f6843626 MR |
101 | /* |
102 | * Set the FIR feature flags for the FPU emulator. | |
103 | */ | |
104 | static void cpu_set_nofpu_id(struct cpuinfo_mips *c) | |
105 | { | |
106 | u32 value; | |
107 | ||
108 | value = 0; | |
109 | if (c->isa_level & (MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M64R1 | | |
110 | MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M64R2 | | |
111 | MIPS_CPU_ISA_M32R6 | MIPS_CPU_ISA_M64R6)) | |
112 | value |= MIPS_FPIR_D | MIPS_FPIR_S; | |
113 | if (c->isa_level & (MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M64R2 | | |
114 | MIPS_CPU_ISA_M32R6 | MIPS_CPU_ISA_M64R6)) | |
115 | value |= MIPS_FPIR_F64 | MIPS_FPIR_L | MIPS_FPIR_W; | |
116 | c->fpu_id = value; | |
117 | } | |
118 | ||
9b26616c MR |
119 | /* Determined FPU emulator mask to use for the boot CPU with "nofpu". */ |
120 | static unsigned int mips_nofpu_msk31; | |
121 | ||
7aecd5ca MR |
122 | /* |
123 | * Set options for FPU hardware. | |
124 | */ | |
125 | static void cpu_set_fpu_opts(struct cpuinfo_mips *c) | |
126 | { | |
127 | c->fpu_id = cpu_get_fpu_id(); | |
128 | mips_nofpu_msk31 = c->fpu_msk31; | |
129 | ||
130 | if (c->isa_level & (MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M64R1 | | |
131 | MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M64R2 | | |
132 | MIPS_CPU_ISA_M32R6 | MIPS_CPU_ISA_M64R6)) { | |
133 | if (c->fpu_id & MIPS_FPIR_3D) | |
134 | c->ases |= MIPS_ASE_MIPS3D; | |
135 | if (c->fpu_id & MIPS_FPIR_FREP) | |
136 | c->options |= MIPS_CPU_FRE; | |
137 | } | |
138 | ||
139 | cpu_set_fpu_fcsr_mask(c); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Set options for the FPU emulator. | |
144 | */ | |
145 | static void cpu_set_nofpu_opts(struct cpuinfo_mips *c) | |
146 | { | |
147 | c->options &= ~MIPS_CPU_FPU; | |
148 | c->fpu_msk31 = mips_nofpu_msk31; | |
149 | ||
150 | cpu_set_nofpu_id(c); | |
151 | } | |
152 | ||
078a55fc | 153 | static int mips_fpu_disabled; |
0103d23f KC |
154 | |
155 | static int __init fpu_disable(char *s) | |
156 | { | |
7aecd5ca | 157 | cpu_set_nofpu_opts(&boot_cpu_data); |
0103d23f KC |
158 | mips_fpu_disabled = 1; |
159 | ||
160 | return 1; | |
161 | } | |
162 | ||
163 | __setup("nofpu", fpu_disable); | |
164 | ||
078a55fc | 165 | int mips_dsp_disabled; |
0103d23f KC |
166 | |
167 | static int __init dsp_disable(char *s) | |
168 | { | |
ee80f7c7 | 169 | cpu_data[0].ases &= ~(MIPS_ASE_DSP | MIPS_ASE_DSP2P); |
0103d23f KC |
170 | mips_dsp_disabled = 1; |
171 | ||
172 | return 1; | |
173 | } | |
174 | ||
175 | __setup("nodsp", dsp_disable); | |
176 | ||
3d528b32 MC |
177 | static int mips_htw_disabled; |
178 | ||
179 | static int __init htw_disable(char *s) | |
180 | { | |
181 | mips_htw_disabled = 1; | |
182 | cpu_data[0].options &= ~MIPS_CPU_HTW; | |
183 | write_c0_pwctl(read_c0_pwctl() & | |
184 | ~(1 << MIPS_PWCTL_PWEN_SHIFT)); | |
185 | ||
186 | return 1; | |
187 | } | |
188 | ||
189 | __setup("nohtw", htw_disable); | |
190 | ||
97f4ad29 MC |
191 | static int mips_ftlb_disabled; |
192 | static int mips_has_ftlb_configured; | |
193 | ||
912708c2 | 194 | static int set_ftlb_enable(struct cpuinfo_mips *c, int enable); |
97f4ad29 MC |
195 | |
196 | static int __init ftlb_disable(char *s) | |
197 | { | |
198 | unsigned int config4, mmuextdef; | |
199 | ||
200 | /* | |
201 | * If the core hasn't done any FTLB configuration, there is nothing | |
202 | * for us to do here. | |
203 | */ | |
204 | if (!mips_has_ftlb_configured) | |
205 | return 1; | |
206 | ||
207 | /* Disable it in the boot cpu */ | |
912708c2 MC |
208 | if (set_ftlb_enable(&cpu_data[0], 0)) { |
209 | pr_warn("Can't turn FTLB off\n"); | |
210 | return 1; | |
211 | } | |
97f4ad29 MC |
212 | |
213 | back_to_back_c0_hazard(); | |
214 | ||
215 | config4 = read_c0_config4(); | |
216 | ||
217 | /* Check that FTLB has been disabled */ | |
218 | mmuextdef = config4 & MIPS_CONF4_MMUEXTDEF; | |
219 | /* MMUSIZEEXT == VTLB ON, FTLB OFF */ | |
220 | if (mmuextdef == MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT) { | |
221 | /* This should never happen */ | |
222 | pr_warn("FTLB could not be disabled!\n"); | |
223 | return 1; | |
224 | } | |
225 | ||
226 | mips_ftlb_disabled = 1; | |
227 | mips_has_ftlb_configured = 0; | |
228 | ||
229 | /* | |
230 | * noftlb is mainly used for debug purposes so print | |
231 | * an informative message instead of using pr_debug() | |
232 | */ | |
233 | pr_info("FTLB has been disabled\n"); | |
234 | ||
235 | /* | |
236 | * Some of these bits are duplicated in the decode_config4. | |
237 | * MIPS_CONF4_MMUEXTDEF_MMUSIZEEXT is the only possible case | |
238 | * once FTLB has been disabled so undo what decode_config4 did. | |
239 | */ | |
240 | cpu_data[0].tlbsize -= cpu_data[0].tlbsizeftlbways * | |
241 | cpu_data[0].tlbsizeftlbsets; | |
242 | cpu_data[0].tlbsizeftlbsets = 0; | |
243 | cpu_data[0].tlbsizeftlbways = 0; | |
244 | ||
245 | return 1; | |
246 | } | |
247 | ||
248 | __setup("noftlb", ftlb_disable); | |
249 | ||
250 | ||
9267a30d MSJ |
251 | static inline void check_errata(void) |
252 | { | |
253 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
254 | ||
69f24d17 | 255 | switch (current_cpu_type()) { |
9267a30d MSJ |
256 | case CPU_34K: |
257 | /* | |
258 | * Erratum "RPS May Cause Incorrect Instruction Execution" | |
b633648c | 259 | * This code only handles VPE0, any SMP/RTOS code |
9267a30d MSJ |
260 | * making use of VPE1 will be responsable for that VPE. |
261 | */ | |
262 | if ((c->processor_id & PRID_REV_MASK) <= PRID_REV_34K_V1_0_2) | |
263 | write_c0_config7(read_c0_config7() | MIPS_CONF7_RPS); | |
264 | break; | |
265 | default: | |
266 | break; | |
267 | } | |
268 | } | |
269 | ||
1da177e4 LT |
270 | void __init check_bugs32(void) |
271 | { | |
9267a30d | 272 | check_errata(); |
1da177e4 LT |
273 | } |
274 | ||
275 | /* | |
276 | * Probe whether cpu has config register by trying to play with | |
277 | * alternate cache bit and see whether it matters. | |
278 | * It's used by cpu_probe to distinguish between R3000A and R3081. | |
279 | */ | |
280 | static inline int cpu_has_confreg(void) | |
281 | { | |
282 | #ifdef CONFIG_CPU_R3000 | |
283 | extern unsigned long r3k_cache_size(unsigned long); | |
284 | unsigned long size1, size2; | |
285 | unsigned long cfg = read_c0_conf(); | |
286 | ||
287 | size1 = r3k_cache_size(ST0_ISC); | |
288 | write_c0_conf(cfg ^ R30XX_CONF_AC); | |
289 | size2 = r3k_cache_size(ST0_ISC); | |
290 | write_c0_conf(cfg); | |
291 | return size1 != size2; | |
292 | #else | |
293 | return 0; | |
294 | #endif | |
295 | } | |
296 | ||
c094c99e RM |
297 | static inline void set_elf_platform(int cpu, const char *plat) |
298 | { | |
299 | if (cpu == 0) | |
300 | __elf_platform = plat; | |
301 | } | |
302 | ||
91dfc423 GR |
303 | static inline void cpu_probe_vmbits(struct cpuinfo_mips *c) |
304 | { | |
305 | #ifdef __NEED_VMBITS_PROBE | |
5b7efa89 | 306 | write_c0_entryhi(0x3fffffffffffe000ULL); |
91dfc423 | 307 | back_to_back_c0_hazard(); |
5b7efa89 | 308 | c->vmbits = fls64(read_c0_entryhi() & 0x3fffffffffffe000ULL); |
91dfc423 GR |
309 | #endif |
310 | } | |
311 | ||
078a55fc | 312 | static void set_isa(struct cpuinfo_mips *c, unsigned int isa) |
a96102be SH |
313 | { |
314 | switch (isa) { | |
315 | case MIPS_CPU_ISA_M64R2: | |
316 | c->isa_level |= MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M64R2; | |
317 | case MIPS_CPU_ISA_M64R1: | |
318 | c->isa_level |= MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M64R1; | |
319 | case MIPS_CPU_ISA_V: | |
320 | c->isa_level |= MIPS_CPU_ISA_V; | |
321 | case MIPS_CPU_ISA_IV: | |
322 | c->isa_level |= MIPS_CPU_ISA_IV; | |
323 | case MIPS_CPU_ISA_III: | |
1990e542 | 324 | c->isa_level |= MIPS_CPU_ISA_II | MIPS_CPU_ISA_III; |
a96102be SH |
325 | break; |
326 | ||
8b8aa636 LY |
327 | /* R6 incompatible with everything else */ |
328 | case MIPS_CPU_ISA_M64R6: | |
329 | c->isa_level |= MIPS_CPU_ISA_M32R6 | MIPS_CPU_ISA_M64R6; | |
330 | case MIPS_CPU_ISA_M32R6: | |
331 | c->isa_level |= MIPS_CPU_ISA_M32R6; | |
332 | /* Break here so we don't add incompatible ISAs */ | |
333 | break; | |
a96102be SH |
334 | case MIPS_CPU_ISA_M32R2: |
335 | c->isa_level |= MIPS_CPU_ISA_M32R2; | |
336 | case MIPS_CPU_ISA_M32R1: | |
337 | c->isa_level |= MIPS_CPU_ISA_M32R1; | |
338 | case MIPS_CPU_ISA_II: | |
339 | c->isa_level |= MIPS_CPU_ISA_II; | |
a96102be SH |
340 | break; |
341 | } | |
342 | } | |
343 | ||
078a55fc | 344 | static char unknown_isa[] = KERN_ERR \ |
2fa36399 KC |
345 | "Unsupported ISA type, c0.config0: %d."; |
346 | ||
cf0a8aa0 MC |
347 | static unsigned int calculate_ftlb_probability(struct cpuinfo_mips *c) |
348 | { | |
349 | ||
350 | unsigned int probability = c->tlbsize / c->tlbsizevtlb; | |
351 | ||
352 | /* | |
353 | * 0 = All TLBWR instructions go to FTLB | |
354 | * 1 = 15:1: For every 16 TBLWR instructions, 15 go to the | |
355 | * FTLB and 1 goes to the VTLB. | |
356 | * 2 = 7:1: As above with 7:1 ratio. | |
357 | * 3 = 3:1: As above with 3:1 ratio. | |
358 | * | |
359 | * Use the linear midpoint as the probability threshold. | |
360 | */ | |
361 | if (probability >= 12) | |
362 | return 1; | |
363 | else if (probability >= 6) | |
364 | return 2; | |
365 | else | |
366 | /* | |
367 | * So FTLB is less than 4 times bigger than VTLB. | |
368 | * A 3:1 ratio can still be useful though. | |
369 | */ | |
370 | return 3; | |
371 | } | |
372 | ||
912708c2 | 373 | static int set_ftlb_enable(struct cpuinfo_mips *c, int enable) |
75b5b5e0 | 374 | { |
20a7f7e5 | 375 | unsigned int config; |
d83b0e82 JH |
376 | |
377 | /* It's implementation dependent how the FTLB can be enabled */ | |
378 | switch (c->cputype) { | |
379 | case CPU_PROAPTIV: | |
380 | case CPU_P5600: | |
381 | /* proAptiv & related cores use Config6 to enable the FTLB */ | |
20a7f7e5 | 382 | config = read_c0_config6(); |
cf0a8aa0 | 383 | /* Clear the old probability value */ |
20a7f7e5 | 384 | config &= ~(3 << MIPS_CONF6_FTLBP_SHIFT); |
75b5b5e0 LY |
385 | if (enable) |
386 | /* Enable FTLB */ | |
20a7f7e5 | 387 | write_c0_config6(config | |
cf0a8aa0 MC |
388 | (calculate_ftlb_probability(c) |
389 | << MIPS_CONF6_FTLBP_SHIFT) | |
390 | | MIPS_CONF6_FTLBEN); | |
75b5b5e0 LY |
391 | else |
392 | /* Disable FTLB */ | |
20a7f7e5 MC |
393 | write_c0_config6(config & ~MIPS_CONF6_FTLBEN); |
394 | break; | |
395 | case CPU_I6400: | |
396 | /* I6400 & related cores use Config7 to configure FTLB */ | |
397 | config = read_c0_config7(); | |
398 | /* Clear the old probability value */ | |
399 | config &= ~(3 << MIPS_CONF7_FTLBP_SHIFT); | |
400 | write_c0_config7(config | (calculate_ftlb_probability(c) | |
401 | << MIPS_CONF7_FTLBP_SHIFT)); | |
d83b0e82 | 402 | break; |
912708c2 MC |
403 | default: |
404 | return 1; | |
75b5b5e0 | 405 | } |
912708c2 MC |
406 | |
407 | return 0; | |
75b5b5e0 LY |
408 | } |
409 | ||
2fa36399 KC |
410 | static inline unsigned int decode_config0(struct cpuinfo_mips *c) |
411 | { | |
412 | unsigned int config0; | |
413 | int isa; | |
414 | ||
415 | config0 = read_c0_config(); | |
416 | ||
75b5b5e0 LY |
417 | /* |
418 | * Look for Standard TLB or Dual VTLB and FTLB | |
419 | */ | |
420 | if ((((config0 & MIPS_CONF_MT) >> 7) == 1) || | |
421 | (((config0 & MIPS_CONF_MT) >> 7) == 4)) | |
2fa36399 | 422 | c->options |= MIPS_CPU_TLB; |
75b5b5e0 | 423 | |
2fa36399 KC |
424 | isa = (config0 & MIPS_CONF_AT) >> 13; |
425 | switch (isa) { | |
426 | case 0: | |
427 | switch ((config0 & MIPS_CONF_AR) >> 10) { | |
428 | case 0: | |
a96102be | 429 | set_isa(c, MIPS_CPU_ISA_M32R1); |
2fa36399 KC |
430 | break; |
431 | case 1: | |
a96102be | 432 | set_isa(c, MIPS_CPU_ISA_M32R2); |
2fa36399 | 433 | break; |
8b8aa636 LY |
434 | case 2: |
435 | set_isa(c, MIPS_CPU_ISA_M32R6); | |
436 | break; | |
2fa36399 KC |
437 | default: |
438 | goto unknown; | |
439 | } | |
440 | break; | |
441 | case 2: | |
442 | switch ((config0 & MIPS_CONF_AR) >> 10) { | |
443 | case 0: | |
a96102be | 444 | set_isa(c, MIPS_CPU_ISA_M64R1); |
2fa36399 KC |
445 | break; |
446 | case 1: | |
a96102be | 447 | set_isa(c, MIPS_CPU_ISA_M64R2); |
2fa36399 | 448 | break; |
8b8aa636 LY |
449 | case 2: |
450 | set_isa(c, MIPS_CPU_ISA_M64R6); | |
451 | break; | |
2fa36399 KC |
452 | default: |
453 | goto unknown; | |
454 | } | |
455 | break; | |
456 | default: | |
457 | goto unknown; | |
458 | } | |
459 | ||
460 | return config0 & MIPS_CONF_M; | |
461 | ||
462 | unknown: | |
463 | panic(unknown_isa, config0); | |
464 | } | |
465 | ||
466 | static inline unsigned int decode_config1(struct cpuinfo_mips *c) | |
467 | { | |
468 | unsigned int config1; | |
469 | ||
470 | config1 = read_c0_config1(); | |
471 | ||
472 | if (config1 & MIPS_CONF1_MD) | |
473 | c->ases |= MIPS_ASE_MDMX; | |
474 | if (config1 & MIPS_CONF1_WR) | |
475 | c->options |= MIPS_CPU_WATCH; | |
476 | if (config1 & MIPS_CONF1_CA) | |
477 | c->ases |= MIPS_ASE_MIPS16; | |
478 | if (config1 & MIPS_CONF1_EP) | |
479 | c->options |= MIPS_CPU_EJTAG; | |
480 | if (config1 & MIPS_CONF1_FP) { | |
481 | c->options |= MIPS_CPU_FPU; | |
482 | c->options |= MIPS_CPU_32FPR; | |
483 | } | |
75b5b5e0 | 484 | if (cpu_has_tlb) { |
2fa36399 | 485 | c->tlbsize = ((config1 & MIPS_CONF1_TLBS) >> 25) + 1; |
75b5b5e0 LY |
486 | c->tlbsizevtlb = c->tlbsize; |
487 | c->tlbsizeftlbsets = 0; | |
488 | } | |
2fa36399 KC |
489 | |
490 | return config1 & MIPS_CONF_M; | |
491 | } | |
492 | ||
493 | static inline unsigned int decode_config2(struct cpuinfo_mips *c) | |
494 | { | |
495 | unsigned int config2; | |
496 | ||
497 | config2 = read_c0_config2(); | |
498 | ||
499 | if (config2 & MIPS_CONF2_SL) | |
500 | c->scache.flags &= ~MIPS_CACHE_NOT_PRESENT; | |
501 | ||
502 | return config2 & MIPS_CONF_M; | |
503 | } | |
504 | ||
505 | static inline unsigned int decode_config3(struct cpuinfo_mips *c) | |
506 | { | |
507 | unsigned int config3; | |
508 | ||
509 | config3 = read_c0_config3(); | |
510 | ||
b2ab4f08 | 511 | if (config3 & MIPS_CONF3_SM) { |
2fa36399 | 512 | c->ases |= MIPS_ASE_SMARTMIPS; |
b2ab4f08 SH |
513 | c->options |= MIPS_CPU_RIXI; |
514 | } | |
515 | if (config3 & MIPS_CONF3_RXI) | |
516 | c->options |= MIPS_CPU_RIXI; | |
2fa36399 KC |
517 | if (config3 & MIPS_CONF3_DSP) |
518 | c->ases |= MIPS_ASE_DSP; | |
ee80f7c7 SH |
519 | if (config3 & MIPS_CONF3_DSP2P) |
520 | c->ases |= MIPS_ASE_DSP2P; | |
2fa36399 KC |
521 | if (config3 & MIPS_CONF3_VINT) |
522 | c->options |= MIPS_CPU_VINT; | |
523 | if (config3 & MIPS_CONF3_VEIC) | |
524 | c->options |= MIPS_CPU_VEIC; | |
525 | if (config3 & MIPS_CONF3_MT) | |
526 | c->ases |= MIPS_ASE_MIPSMT; | |
527 | if (config3 & MIPS_CONF3_ULRI) | |
528 | c->options |= MIPS_CPU_ULRI; | |
f8fa4811 SH |
529 | if (config3 & MIPS_CONF3_ISA) |
530 | c->options |= MIPS_CPU_MICROMIPS; | |
1e7decdb DD |
531 | if (config3 & MIPS_CONF3_VZ) |
532 | c->ases |= MIPS_ASE_VZ; | |
4a0156fb SH |
533 | if (config3 & MIPS_CONF3_SC) |
534 | c->options |= MIPS_CPU_SEGMENTS; | |
a5e9a69e PB |
535 | if (config3 & MIPS_CONF3_MSA) |
536 | c->ases |= MIPS_ASE_MSA; | |
3d528b32 | 537 | /* Only tested on 32-bit cores */ |
ed4cbc81 MC |
538 | if ((config3 & MIPS_CONF3_PW) && config_enabled(CONFIG_32BIT)) { |
539 | c->htw_seq = 0; | |
3d528b32 | 540 | c->options |= MIPS_CPU_HTW; |
ed4cbc81 | 541 | } |
9b3274bd JH |
542 | if (config3 & MIPS_CONF3_CDMM) |
543 | c->options |= MIPS_CPU_CDMM; | |
aaa7be48 JH |
544 | if (config3 & MIPS_CONF3_SP) |
545 | c->options |= MIPS_CPU_SP; | |
2fa36399 KC |
546 | |
547 | return config3 & MIPS_CONF_M; | |
548 | } | |
549 | ||
550 | static inline unsigned int decode_config4(struct cpuinfo_mips *c) | |
551 | { | |
552 | unsigned int config4; | |
75b5b5e0 LY |
553 | unsigned int newcf4; |
554 | unsigned int mmuextdef; | |
555 | unsigned int ftlb_page = MIPS_CONF4_FTLBPAGESIZE; | |
2fa36399 KC |
556 | |
557 | config4 = read_c0_config4(); | |
558 | ||
1745c1ef LY |
559 | if (cpu_has_tlb) { |
560 | if (((config4 & MIPS_CONF4_IE) >> 29) == 2) | |
561 | c->options |= MIPS_CPU_TLBINV; | |
e87569cd MC |
562 | /* |
563 | * This is a bit ugly. R6 has dropped that field from | |
564 | * config4 and the only valid configuration is VTLB+FTLB so | |
565 | * set a good value for mmuextdef for that case. | |
566 | */ | |
567 | if (cpu_has_mips_r6) | |
568 | mmuextdef = MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT; | |
569 | else | |
570 | mmuextdef = config4 & MIPS_CONF4_MMUEXTDEF; | |
571 | ||
75b5b5e0 LY |
572 | switch (mmuextdef) { |
573 | case MIPS_CONF4_MMUEXTDEF_MMUSIZEEXT: | |
574 | c->tlbsize += (config4 & MIPS_CONF4_MMUSIZEEXT) * 0x40; | |
575 | c->tlbsizevtlb = c->tlbsize; | |
576 | break; | |
577 | case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT: | |
578 | c->tlbsizevtlb += | |
579 | ((config4 & MIPS_CONF4_VTLBSIZEEXT) >> | |
580 | MIPS_CONF4_VTLBSIZEEXT_SHIFT) * 0x40; | |
581 | c->tlbsize = c->tlbsizevtlb; | |
582 | ftlb_page = MIPS_CONF4_VFTLBPAGESIZE; | |
583 | /* fall through */ | |
584 | case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT: | |
97f4ad29 MC |
585 | if (mips_ftlb_disabled) |
586 | break; | |
75b5b5e0 LY |
587 | newcf4 = (config4 & ~ftlb_page) | |
588 | (page_size_ftlb(mmuextdef) << | |
589 | MIPS_CONF4_FTLBPAGESIZE_SHIFT); | |
590 | write_c0_config4(newcf4); | |
591 | back_to_back_c0_hazard(); | |
592 | config4 = read_c0_config4(); | |
593 | if (config4 != newcf4) { | |
594 | pr_err("PAGE_SIZE 0x%lx is not supported by FTLB (config4=0x%x)\n", | |
595 | PAGE_SIZE, config4); | |
596 | /* Switch FTLB off */ | |
597 | set_ftlb_enable(c, 0); | |
598 | break; | |
599 | } | |
600 | c->tlbsizeftlbsets = 1 << | |
601 | ((config4 & MIPS_CONF4_FTLBSETS) >> | |
602 | MIPS_CONF4_FTLBSETS_SHIFT); | |
603 | c->tlbsizeftlbways = ((config4 & MIPS_CONF4_FTLBWAYS) >> | |
604 | MIPS_CONF4_FTLBWAYS_SHIFT) + 2; | |
605 | c->tlbsize += c->tlbsizeftlbways * c->tlbsizeftlbsets; | |
97f4ad29 | 606 | mips_has_ftlb_configured = 1; |
75b5b5e0 LY |
607 | break; |
608 | } | |
1745c1ef LY |
609 | } |
610 | ||
2fa36399 KC |
611 | c->kscratch_mask = (config4 >> 16) & 0xff; |
612 | ||
613 | return config4 & MIPS_CONF_M; | |
614 | } | |
615 | ||
8b8a7634 RB |
616 | static inline unsigned int decode_config5(struct cpuinfo_mips *c) |
617 | { | |
618 | unsigned int config5; | |
619 | ||
620 | config5 = read_c0_config5(); | |
d175ed2b | 621 | config5 &= ~(MIPS_CONF5_UFR | MIPS_CONF5_UFE); |
8b8a7634 RB |
622 | write_c0_config5(config5); |
623 | ||
49016748 MC |
624 | if (config5 & MIPS_CONF5_EVA) |
625 | c->options |= MIPS_CPU_EVA; | |
1f6c52ff PB |
626 | if (config5 & MIPS_CONF5_MRP) |
627 | c->options |= MIPS_CPU_MAAR; | |
5aed9da1 MC |
628 | if (config5 & MIPS_CONF5_LLB) |
629 | c->options |= MIPS_CPU_RW_LLB; | |
c5b36783 SH |
630 | #ifdef CONFIG_XPA |
631 | if (config5 & MIPS_CONF5_MVH) | |
632 | c->options |= MIPS_CPU_XPA; | |
633 | #endif | |
49016748 | 634 | |
8b8a7634 RB |
635 | return config5 & MIPS_CONF_M; |
636 | } | |
637 | ||
078a55fc | 638 | static void decode_configs(struct cpuinfo_mips *c) |
2fa36399 KC |
639 | { |
640 | int ok; | |
641 | ||
642 | /* MIPS32 or MIPS64 compliant CPU. */ | |
643 | c->options = MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE | MIPS_CPU_COUNTER | | |
644 | MIPS_CPU_DIVEC | MIPS_CPU_LLSC | MIPS_CPU_MCHECK; | |
645 | ||
646 | c->scache.flags = MIPS_CACHE_NOT_PRESENT; | |
647 | ||
97f4ad29 MC |
648 | /* Enable FTLB if present and not disabled */ |
649 | set_ftlb_enable(c, !mips_ftlb_disabled); | |
75b5b5e0 | 650 | |
2fa36399 | 651 | ok = decode_config0(c); /* Read Config registers. */ |
70342287 | 652 | BUG_ON(!ok); /* Arch spec violation! */ |
2fa36399 KC |
653 | if (ok) |
654 | ok = decode_config1(c); | |
655 | if (ok) | |
656 | ok = decode_config2(c); | |
657 | if (ok) | |
658 | ok = decode_config3(c); | |
659 | if (ok) | |
660 | ok = decode_config4(c); | |
8b8a7634 RB |
661 | if (ok) |
662 | ok = decode_config5(c); | |
2fa36399 KC |
663 | |
664 | mips_probe_watch_registers(c); | |
665 | ||
6575b1d4 LY |
666 | if (cpu_has_rixi) { |
667 | /* Enable the RIXI exceptions */ | |
a5770df0 | 668 | set_c0_pagegrain(PG_IEC); |
6575b1d4 LY |
669 | back_to_back_c0_hazard(); |
670 | /* Verify the IEC bit is set */ | |
671 | if (read_c0_pagegrain() & PG_IEC) | |
672 | c->options |= MIPS_CPU_RIXIEX; | |
673 | } | |
674 | ||
0ee958e1 | 675 | #ifndef CONFIG_MIPS_CPS |
8b8aa636 | 676 | if (cpu_has_mips_r2_r6) { |
45b585c8 | 677 | c->core = get_ebase_cpunum(); |
30ee615b PB |
678 | if (cpu_has_mipsmt) |
679 | c->core >>= fls(core_nvpes()) - 1; | |
680 | } | |
0ee958e1 | 681 | #endif |
2fa36399 KC |
682 | } |
683 | ||
02cf2119 | 684 | #define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \ |
1da177e4 LT |
685 | | MIPS_CPU_COUNTER) |
686 | ||
cea7e2df | 687 | static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 688 | { |
8ff374b9 | 689 | switch (c->processor_id & PRID_IMP_MASK) { |
1da177e4 LT |
690 | case PRID_IMP_R2000: |
691 | c->cputype = CPU_R2000; | |
cea7e2df | 692 | __cpu_name[cpu] = "R2000"; |
9b26616c | 693 | c->fpu_msk31 |= FPU_CSR_CONDX | FPU_CSR_FS; |
02cf2119 | 694 | c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE | |
03751e79 | 695 | MIPS_CPU_NOFPUEX; |
1da177e4 LT |
696 | if (__cpu_has_fpu()) |
697 | c->options |= MIPS_CPU_FPU; | |
698 | c->tlbsize = 64; | |
699 | break; | |
700 | case PRID_IMP_R3000: | |
8ff374b9 | 701 | if ((c->processor_id & PRID_REV_MASK) == PRID_REV_R3000A) { |
cea7e2df | 702 | if (cpu_has_confreg()) { |
1da177e4 | 703 | c->cputype = CPU_R3081E; |
cea7e2df RB |
704 | __cpu_name[cpu] = "R3081"; |
705 | } else { | |
1da177e4 | 706 | c->cputype = CPU_R3000A; |
cea7e2df RB |
707 | __cpu_name[cpu] = "R3000A"; |
708 | } | |
cea7e2df | 709 | } else { |
1da177e4 | 710 | c->cputype = CPU_R3000; |
cea7e2df RB |
711 | __cpu_name[cpu] = "R3000"; |
712 | } | |
9b26616c | 713 | c->fpu_msk31 |= FPU_CSR_CONDX | FPU_CSR_FS; |
02cf2119 | 714 | c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE | |
03751e79 | 715 | MIPS_CPU_NOFPUEX; |
1da177e4 LT |
716 | if (__cpu_has_fpu()) |
717 | c->options |= MIPS_CPU_FPU; | |
718 | c->tlbsize = 64; | |
719 | break; | |
720 | case PRID_IMP_R4000: | |
721 | if (read_c0_config() & CONF_SC) { | |
8ff374b9 MR |
722 | if ((c->processor_id & PRID_REV_MASK) >= |
723 | PRID_REV_R4400) { | |
1da177e4 | 724 | c->cputype = CPU_R4400PC; |
cea7e2df RB |
725 | __cpu_name[cpu] = "R4400PC"; |
726 | } else { | |
1da177e4 | 727 | c->cputype = CPU_R4000PC; |
cea7e2df RB |
728 | __cpu_name[cpu] = "R4000PC"; |
729 | } | |
1da177e4 | 730 | } else { |
7f177a52 MR |
731 | int cca = read_c0_config() & CONF_CM_CMASK; |
732 | int mc; | |
733 | ||
734 | /* | |
735 | * SC and MC versions can't be reliably told apart, | |
736 | * but only the latter support coherent caching | |
737 | * modes so assume the firmware has set the KSEG0 | |
738 | * coherency attribute reasonably (if uncached, we | |
739 | * assume SC). | |
740 | */ | |
741 | switch (cca) { | |
742 | case CONF_CM_CACHABLE_CE: | |
743 | case CONF_CM_CACHABLE_COW: | |
744 | case CONF_CM_CACHABLE_CUW: | |
745 | mc = 1; | |
746 | break; | |
747 | default: | |
748 | mc = 0; | |
749 | break; | |
750 | } | |
8ff374b9 MR |
751 | if ((c->processor_id & PRID_REV_MASK) >= |
752 | PRID_REV_R4400) { | |
7f177a52 MR |
753 | c->cputype = mc ? CPU_R4400MC : CPU_R4400SC; |
754 | __cpu_name[cpu] = mc ? "R4400MC" : "R4400SC"; | |
cea7e2df | 755 | } else { |
7f177a52 MR |
756 | c->cputype = mc ? CPU_R4000MC : CPU_R4000SC; |
757 | __cpu_name[cpu] = mc ? "R4000MC" : "R4000SC"; | |
cea7e2df | 758 | } |
1da177e4 LT |
759 | } |
760 | ||
a96102be | 761 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 762 | c->fpu_msk31 |= FPU_CSR_CONDX; |
1da177e4 | 763 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 SH |
764 | MIPS_CPU_WATCH | MIPS_CPU_VCE | |
765 | MIPS_CPU_LLSC; | |
1da177e4 LT |
766 | c->tlbsize = 48; |
767 | break; | |
768 | case PRID_IMP_VR41XX: | |
9f91e506 | 769 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 770 | c->fpu_msk31 |= FPU_CSR_CONDX; |
9f91e506 YY |
771 | c->options = R4K_OPTS; |
772 | c->tlbsize = 32; | |
1da177e4 | 773 | switch (c->processor_id & 0xf0) { |
1da177e4 LT |
774 | case PRID_REV_VR4111: |
775 | c->cputype = CPU_VR4111; | |
cea7e2df | 776 | __cpu_name[cpu] = "NEC VR4111"; |
1da177e4 | 777 | break; |
1da177e4 LT |
778 | case PRID_REV_VR4121: |
779 | c->cputype = CPU_VR4121; | |
cea7e2df | 780 | __cpu_name[cpu] = "NEC VR4121"; |
1da177e4 LT |
781 | break; |
782 | case PRID_REV_VR4122: | |
cea7e2df | 783 | if ((c->processor_id & 0xf) < 0x3) { |
1da177e4 | 784 | c->cputype = CPU_VR4122; |
cea7e2df RB |
785 | __cpu_name[cpu] = "NEC VR4122"; |
786 | } else { | |
1da177e4 | 787 | c->cputype = CPU_VR4181A; |
cea7e2df RB |
788 | __cpu_name[cpu] = "NEC VR4181A"; |
789 | } | |
1da177e4 LT |
790 | break; |
791 | case PRID_REV_VR4130: | |
cea7e2df | 792 | if ((c->processor_id & 0xf) < 0x4) { |
1da177e4 | 793 | c->cputype = CPU_VR4131; |
cea7e2df RB |
794 | __cpu_name[cpu] = "NEC VR4131"; |
795 | } else { | |
1da177e4 | 796 | c->cputype = CPU_VR4133; |
9f91e506 | 797 | c->options |= MIPS_CPU_LLSC; |
cea7e2df RB |
798 | __cpu_name[cpu] = "NEC VR4133"; |
799 | } | |
1da177e4 LT |
800 | break; |
801 | default: | |
802 | printk(KERN_INFO "Unexpected CPU of NEC VR4100 series\n"); | |
803 | c->cputype = CPU_VR41XX; | |
cea7e2df | 804 | __cpu_name[cpu] = "NEC Vr41xx"; |
1da177e4 LT |
805 | break; |
806 | } | |
1da177e4 LT |
807 | break; |
808 | case PRID_IMP_R4300: | |
809 | c->cputype = CPU_R4300; | |
cea7e2df | 810 | __cpu_name[cpu] = "R4300"; |
a96102be | 811 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 812 | c->fpu_msk31 |= FPU_CSR_CONDX; |
1da177e4 | 813 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 814 | MIPS_CPU_LLSC; |
1da177e4 LT |
815 | c->tlbsize = 32; |
816 | break; | |
817 | case PRID_IMP_R4600: | |
818 | c->cputype = CPU_R4600; | |
cea7e2df | 819 | __cpu_name[cpu] = "R4600"; |
a96102be | 820 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 821 | c->fpu_msk31 |= FPU_CSR_CONDX; |
075e7502 TS |
822 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
823 | MIPS_CPU_LLSC; | |
1da177e4 LT |
824 | c->tlbsize = 48; |
825 | break; | |
826 | #if 0 | |
03751e79 | 827 | case PRID_IMP_R4650: |
1da177e4 LT |
828 | /* |
829 | * This processor doesn't have an MMU, so it's not | |
830 | * "real easy" to run Linux on it. It is left purely | |
831 | * for documentation. Commented out because it shares | |
832 | * it's c0_prid id number with the TX3900. | |
833 | */ | |
a3dddd56 | 834 | c->cputype = CPU_R4650; |
cea7e2df | 835 | __cpu_name[cpu] = "R4650"; |
a96102be | 836 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 837 | c->fpu_msk31 |= FPU_CSR_CONDX; |
1da177e4 | 838 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_LLSC; |
03751e79 | 839 | c->tlbsize = 48; |
1da177e4 LT |
840 | break; |
841 | #endif | |
842 | case PRID_IMP_TX39: | |
9b26616c | 843 | c->fpu_msk31 |= FPU_CSR_CONDX | FPU_CSR_FS; |
02cf2119 | 844 | c->options = MIPS_CPU_TLB | MIPS_CPU_TX39_CACHE; |
1da177e4 LT |
845 | |
846 | if ((c->processor_id & 0xf0) == (PRID_REV_TX3927 & 0xf0)) { | |
847 | c->cputype = CPU_TX3927; | |
cea7e2df | 848 | __cpu_name[cpu] = "TX3927"; |
1da177e4 LT |
849 | c->tlbsize = 64; |
850 | } else { | |
8ff374b9 | 851 | switch (c->processor_id & PRID_REV_MASK) { |
1da177e4 LT |
852 | case PRID_REV_TX3912: |
853 | c->cputype = CPU_TX3912; | |
cea7e2df | 854 | __cpu_name[cpu] = "TX3912"; |
1da177e4 LT |
855 | c->tlbsize = 32; |
856 | break; | |
857 | case PRID_REV_TX3922: | |
858 | c->cputype = CPU_TX3922; | |
cea7e2df | 859 | __cpu_name[cpu] = "TX3922"; |
1da177e4 LT |
860 | c->tlbsize = 64; |
861 | break; | |
1da177e4 LT |
862 | } |
863 | } | |
864 | break; | |
865 | case PRID_IMP_R4700: | |
866 | c->cputype = CPU_R4700; | |
cea7e2df | 867 | __cpu_name[cpu] = "R4700"; |
a96102be | 868 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 869 | c->fpu_msk31 |= FPU_CSR_CONDX; |
1da177e4 | 870 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 871 | MIPS_CPU_LLSC; |
1da177e4 LT |
872 | c->tlbsize = 48; |
873 | break; | |
874 | case PRID_IMP_TX49: | |
875 | c->cputype = CPU_TX49XX; | |
cea7e2df | 876 | __cpu_name[cpu] = "R49XX"; |
a96102be | 877 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 878 | c->fpu_msk31 |= FPU_CSR_CONDX; |
1da177e4 LT |
879 | c->options = R4K_OPTS | MIPS_CPU_LLSC; |
880 | if (!(c->processor_id & 0x08)) | |
881 | c->options |= MIPS_CPU_FPU | MIPS_CPU_32FPR; | |
882 | c->tlbsize = 48; | |
883 | break; | |
884 | case PRID_IMP_R5000: | |
885 | c->cputype = CPU_R5000; | |
cea7e2df | 886 | __cpu_name[cpu] = "R5000"; |
a96102be | 887 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 888 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 889 | MIPS_CPU_LLSC; |
1da177e4 LT |
890 | c->tlbsize = 48; |
891 | break; | |
892 | case PRID_IMP_R5432: | |
893 | c->cputype = CPU_R5432; | |
cea7e2df | 894 | __cpu_name[cpu] = "R5432"; |
a96102be | 895 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 896 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 897 | MIPS_CPU_WATCH | MIPS_CPU_LLSC; |
1da177e4 LT |
898 | c->tlbsize = 48; |
899 | break; | |
900 | case PRID_IMP_R5500: | |
901 | c->cputype = CPU_R5500; | |
cea7e2df | 902 | __cpu_name[cpu] = "R5500"; |
a96102be | 903 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 904 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 905 | MIPS_CPU_WATCH | MIPS_CPU_LLSC; |
1da177e4 LT |
906 | c->tlbsize = 48; |
907 | break; | |
908 | case PRID_IMP_NEVADA: | |
909 | c->cputype = CPU_NEVADA; | |
cea7e2df | 910 | __cpu_name[cpu] = "Nevada"; |
a96102be | 911 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 912 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 913 | MIPS_CPU_DIVEC | MIPS_CPU_LLSC; |
1da177e4 LT |
914 | c->tlbsize = 48; |
915 | break; | |
916 | case PRID_IMP_R6000: | |
917 | c->cputype = CPU_R6000; | |
cea7e2df | 918 | __cpu_name[cpu] = "R6000"; |
a96102be | 919 | set_isa(c, MIPS_CPU_ISA_II); |
9b26616c | 920 | c->fpu_msk31 |= FPU_CSR_CONDX | FPU_CSR_FS; |
1da177e4 | 921 | c->options = MIPS_CPU_TLB | MIPS_CPU_FPU | |
03751e79 | 922 | MIPS_CPU_LLSC; |
1da177e4 LT |
923 | c->tlbsize = 32; |
924 | break; | |
925 | case PRID_IMP_R6000A: | |
926 | c->cputype = CPU_R6000A; | |
cea7e2df | 927 | __cpu_name[cpu] = "R6000A"; |
a96102be | 928 | set_isa(c, MIPS_CPU_ISA_II); |
9b26616c | 929 | c->fpu_msk31 |= FPU_CSR_CONDX | FPU_CSR_FS; |
1da177e4 | 930 | c->options = MIPS_CPU_TLB | MIPS_CPU_FPU | |
03751e79 | 931 | MIPS_CPU_LLSC; |
1da177e4 LT |
932 | c->tlbsize = 32; |
933 | break; | |
934 | case PRID_IMP_RM7000: | |
935 | c->cputype = CPU_RM7000; | |
cea7e2df | 936 | __cpu_name[cpu] = "RM7000"; |
a96102be | 937 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 938 | c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
03751e79 | 939 | MIPS_CPU_LLSC; |
1da177e4 | 940 | /* |
70342287 | 941 | * Undocumented RM7000: Bit 29 in the info register of |
1da177e4 LT |
942 | * the RM7000 v2.0 indicates if the TLB has 48 or 64 |
943 | * entries. | |
944 | * | |
70342287 RB |
945 | * 29 1 => 64 entry JTLB |
946 | * 0 => 48 entry JTLB | |
1da177e4 LT |
947 | */ |
948 | c->tlbsize = (read_c0_info() & (1 << 29)) ? 64 : 48; | |
1da177e4 LT |
949 | break; |
950 | case PRID_IMP_R8000: | |
951 | c->cputype = CPU_R8000; | |
cea7e2df | 952 | __cpu_name[cpu] = "RM8000"; |
a96102be | 953 | set_isa(c, MIPS_CPU_ISA_IV); |
1da177e4 | 954 | c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX | |
03751e79 SH |
955 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
956 | MIPS_CPU_LLSC; | |
1da177e4 LT |
957 | c->tlbsize = 384; /* has weird TLB: 3-way x 128 */ |
958 | break; | |
959 | case PRID_IMP_R10000: | |
960 | c->cputype = CPU_R10000; | |
cea7e2df | 961 | __cpu_name[cpu] = "R10000"; |
a96102be | 962 | set_isa(c, MIPS_CPU_ISA_IV); |
8b36612a | 963 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | |
03751e79 | 964 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
1da177e4 | 965 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | |
03751e79 | 966 | MIPS_CPU_LLSC; |
1da177e4 LT |
967 | c->tlbsize = 64; |
968 | break; | |
969 | case PRID_IMP_R12000: | |
970 | c->cputype = CPU_R12000; | |
cea7e2df | 971 | __cpu_name[cpu] = "R12000"; |
a96102be | 972 | set_isa(c, MIPS_CPU_ISA_IV); |
8b36612a | 973 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | |
03751e79 | 974 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
1da177e4 | 975 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | |
8d5ded16 | 976 | MIPS_CPU_LLSC | MIPS_CPU_BP_GHIST; |
1da177e4 LT |
977 | c->tlbsize = 64; |
978 | break; | |
44d921b2 | 979 | case PRID_IMP_R14000: |
30577391 JK |
980 | if (((c->processor_id >> 4) & 0x0f) > 2) { |
981 | c->cputype = CPU_R16000; | |
982 | __cpu_name[cpu] = "R16000"; | |
983 | } else { | |
984 | c->cputype = CPU_R14000; | |
985 | __cpu_name[cpu] = "R14000"; | |
986 | } | |
a96102be | 987 | set_isa(c, MIPS_CPU_ISA_IV); |
44d921b2 | 988 | c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX | |
03751e79 | 989 | MIPS_CPU_FPU | MIPS_CPU_32FPR | |
44d921b2 | 990 | MIPS_CPU_COUNTER | MIPS_CPU_WATCH | |
8d5ded16 | 991 | MIPS_CPU_LLSC | MIPS_CPU_BP_GHIST; |
44d921b2 K |
992 | c->tlbsize = 64; |
993 | break; | |
26859198 | 994 | case PRID_IMP_LOONGSON_64: /* Loongson-2/3 */ |
5aac1e8a RM |
995 | switch (c->processor_id & PRID_REV_MASK) { |
996 | case PRID_REV_LOONGSON2E: | |
c579d310 HC |
997 | c->cputype = CPU_LOONGSON2; |
998 | __cpu_name[cpu] = "ICT Loongson-2"; | |
5aac1e8a | 999 | set_elf_platform(cpu, "loongson2e"); |
7352c8b1 | 1000 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 1001 | c->fpu_msk31 |= FPU_CSR_CONDX; |
5aac1e8a RM |
1002 | break; |
1003 | case PRID_REV_LOONGSON2F: | |
c579d310 HC |
1004 | c->cputype = CPU_LOONGSON2; |
1005 | __cpu_name[cpu] = "ICT Loongson-2"; | |
5aac1e8a | 1006 | set_elf_platform(cpu, "loongson2f"); |
7352c8b1 | 1007 | set_isa(c, MIPS_CPU_ISA_III); |
9b26616c | 1008 | c->fpu_msk31 |= FPU_CSR_CONDX; |
5aac1e8a | 1009 | break; |
c579d310 HC |
1010 | case PRID_REV_LOONGSON3A: |
1011 | c->cputype = CPU_LOONGSON3; | |
1012 | __cpu_name[cpu] = "ICT Loongson-3"; | |
1013 | set_elf_platform(cpu, "loongson3a"); | |
7352c8b1 | 1014 | set_isa(c, MIPS_CPU_ISA_M64R1); |
c579d310 | 1015 | break; |
e7841be5 HC |
1016 | case PRID_REV_LOONGSON3B_R1: |
1017 | case PRID_REV_LOONGSON3B_R2: | |
1018 | c->cputype = CPU_LOONGSON3; | |
1019 | __cpu_name[cpu] = "ICT Loongson-3"; | |
1020 | set_elf_platform(cpu, "loongson3b"); | |
7352c8b1 | 1021 | set_isa(c, MIPS_CPU_ISA_M64R1); |
e7841be5 | 1022 | break; |
5aac1e8a RM |
1023 | } |
1024 | ||
2a21c730 FZ |
1025 | c->options = R4K_OPTS | |
1026 | MIPS_CPU_FPU | MIPS_CPU_LLSC | | |
1027 | MIPS_CPU_32FPR; | |
1028 | c->tlbsize = 64; | |
cc94ea31 | 1029 | c->writecombine = _CACHE_UNCACHED_ACCELERATED; |
2a21c730 | 1030 | break; |
26859198 | 1031 | case PRID_IMP_LOONGSON_32: /* Loongson-1 */ |
2fa36399 | 1032 | decode_configs(c); |
b4672d37 | 1033 | |
2fa36399 | 1034 | c->cputype = CPU_LOONGSON1; |
1da177e4 | 1035 | |
2fa36399 KC |
1036 | switch (c->processor_id & PRID_REV_MASK) { |
1037 | case PRID_REV_LOONGSON1B: | |
1038 | __cpu_name[cpu] = "Loongson 1B"; | |
b4672d37 | 1039 | break; |
b4672d37 | 1040 | } |
4194318c | 1041 | |
2fa36399 | 1042 | break; |
1da177e4 | 1043 | } |
1da177e4 LT |
1044 | } |
1045 | ||
cea7e2df | 1046 | static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 1047 | { |
4f12b91d | 1048 | c->writecombine = _CACHE_UNCACHED_ACCELERATED; |
8ff374b9 | 1049 | switch (c->processor_id & PRID_IMP_MASK) { |
b2498af5 LY |
1050 | case PRID_IMP_QEMU_GENERIC: |
1051 | c->writecombine = _CACHE_UNCACHED; | |
1052 | c->cputype = CPU_QEMU_GENERIC; | |
1053 | __cpu_name[cpu] = "MIPS GENERIC QEMU"; | |
1054 | break; | |
1da177e4 LT |
1055 | case PRID_IMP_4KC: |
1056 | c->cputype = CPU_4KC; | |
4f12b91d | 1057 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1058 | __cpu_name[cpu] = "MIPS 4Kc"; |
1da177e4 LT |
1059 | break; |
1060 | case PRID_IMP_4KEC: | |
2b07bd02 RB |
1061 | case PRID_IMP_4KECR2: |
1062 | c->cputype = CPU_4KEC; | |
4f12b91d | 1063 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1064 | __cpu_name[cpu] = "MIPS 4KEc"; |
2b07bd02 | 1065 | break; |
1da177e4 | 1066 | case PRID_IMP_4KSC: |
8afcb5d8 | 1067 | case PRID_IMP_4KSD: |
1da177e4 | 1068 | c->cputype = CPU_4KSC; |
4f12b91d | 1069 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1070 | __cpu_name[cpu] = "MIPS 4KSc"; |
1da177e4 LT |
1071 | break; |
1072 | case PRID_IMP_5KC: | |
1073 | c->cputype = CPU_5KC; | |
4f12b91d | 1074 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1075 | __cpu_name[cpu] = "MIPS 5Kc"; |
1da177e4 | 1076 | break; |
78d4803f LY |
1077 | case PRID_IMP_5KE: |
1078 | c->cputype = CPU_5KE; | |
4f12b91d | 1079 | c->writecombine = _CACHE_UNCACHED; |
78d4803f LY |
1080 | __cpu_name[cpu] = "MIPS 5KE"; |
1081 | break; | |
1da177e4 LT |
1082 | case PRID_IMP_20KC: |
1083 | c->cputype = CPU_20KC; | |
4f12b91d | 1084 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1085 | __cpu_name[cpu] = "MIPS 20Kc"; |
1da177e4 LT |
1086 | break; |
1087 | case PRID_IMP_24K: | |
1088 | c->cputype = CPU_24K; | |
4f12b91d | 1089 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1090 | __cpu_name[cpu] = "MIPS 24Kc"; |
1da177e4 | 1091 | break; |
42f3caef JC |
1092 | case PRID_IMP_24KE: |
1093 | c->cputype = CPU_24K; | |
4f12b91d | 1094 | c->writecombine = _CACHE_UNCACHED; |
42f3caef JC |
1095 | __cpu_name[cpu] = "MIPS 24KEc"; |
1096 | break; | |
1da177e4 LT |
1097 | case PRID_IMP_25KF: |
1098 | c->cputype = CPU_25KF; | |
4f12b91d | 1099 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1100 | __cpu_name[cpu] = "MIPS 25Kc"; |
1da177e4 | 1101 | break; |
bbc7f22f RB |
1102 | case PRID_IMP_34K: |
1103 | c->cputype = CPU_34K; | |
4f12b91d | 1104 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1105 | __cpu_name[cpu] = "MIPS 34Kc"; |
bbc7f22f | 1106 | break; |
c620953c CD |
1107 | case PRID_IMP_74K: |
1108 | c->cputype = CPU_74K; | |
4f12b91d | 1109 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1110 | __cpu_name[cpu] = "MIPS 74Kc"; |
c620953c | 1111 | break; |
113c62d9 SH |
1112 | case PRID_IMP_M14KC: |
1113 | c->cputype = CPU_M14KC; | |
4f12b91d | 1114 | c->writecombine = _CACHE_UNCACHED; |
113c62d9 SH |
1115 | __cpu_name[cpu] = "MIPS M14Kc"; |
1116 | break; | |
f8fa4811 SH |
1117 | case PRID_IMP_M14KEC: |
1118 | c->cputype = CPU_M14KEC; | |
4f12b91d | 1119 | c->writecombine = _CACHE_UNCACHED; |
f8fa4811 SH |
1120 | __cpu_name[cpu] = "MIPS M14KEc"; |
1121 | break; | |
39b8d525 RB |
1122 | case PRID_IMP_1004K: |
1123 | c->cputype = CPU_1004K; | |
4f12b91d | 1124 | c->writecombine = _CACHE_UNCACHED; |
cea7e2df | 1125 | __cpu_name[cpu] = "MIPS 1004Kc"; |
39b8d525 | 1126 | break; |
006a851b | 1127 | case PRID_IMP_1074K: |
442e14a2 | 1128 | c->cputype = CPU_1074K; |
4f12b91d | 1129 | c->writecombine = _CACHE_UNCACHED; |
006a851b SH |
1130 | __cpu_name[cpu] = "MIPS 1074Kc"; |
1131 | break; | |
b5f065e7 LY |
1132 | case PRID_IMP_INTERAPTIV_UP: |
1133 | c->cputype = CPU_INTERAPTIV; | |
1134 | __cpu_name[cpu] = "MIPS interAptiv"; | |
1135 | break; | |
1136 | case PRID_IMP_INTERAPTIV_MP: | |
1137 | c->cputype = CPU_INTERAPTIV; | |
1138 | __cpu_name[cpu] = "MIPS interAptiv (multi)"; | |
1139 | break; | |
b0d4d300 LY |
1140 | case PRID_IMP_PROAPTIV_UP: |
1141 | c->cputype = CPU_PROAPTIV; | |
1142 | __cpu_name[cpu] = "MIPS proAptiv"; | |
1143 | break; | |
1144 | case PRID_IMP_PROAPTIV_MP: | |
1145 | c->cputype = CPU_PROAPTIV; | |
1146 | __cpu_name[cpu] = "MIPS proAptiv (multi)"; | |
1147 | break; | |
829dcc0a JH |
1148 | case PRID_IMP_P5600: |
1149 | c->cputype = CPU_P5600; | |
1150 | __cpu_name[cpu] = "MIPS P5600"; | |
1151 | break; | |
e57f9a2d MC |
1152 | case PRID_IMP_I6400: |
1153 | c->cputype = CPU_I6400; | |
1154 | __cpu_name[cpu] = "MIPS I6400"; | |
1155 | break; | |
9943ed92 LY |
1156 | case PRID_IMP_M5150: |
1157 | c->cputype = CPU_M5150; | |
1158 | __cpu_name[cpu] = "MIPS M5150"; | |
1159 | break; | |
1da177e4 | 1160 | } |
0b6d497f | 1161 | |
75b5b5e0 LY |
1162 | decode_configs(c); |
1163 | ||
0b6d497f | 1164 | spram_config(); |
1da177e4 LT |
1165 | } |
1166 | ||
cea7e2df | 1167 | static inline void cpu_probe_alchemy(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 1168 | { |
4194318c | 1169 | decode_configs(c); |
8ff374b9 | 1170 | switch (c->processor_id & PRID_IMP_MASK) { |
1da177e4 LT |
1171 | case PRID_IMP_AU1_REV1: |
1172 | case PRID_IMP_AU1_REV2: | |
270717a8 | 1173 | c->cputype = CPU_ALCHEMY; |
1da177e4 LT |
1174 | switch ((c->processor_id >> 24) & 0xff) { |
1175 | case 0: | |
cea7e2df | 1176 | __cpu_name[cpu] = "Au1000"; |
1da177e4 LT |
1177 | break; |
1178 | case 1: | |
cea7e2df | 1179 | __cpu_name[cpu] = "Au1500"; |
1da177e4 LT |
1180 | break; |
1181 | case 2: | |
cea7e2df | 1182 | __cpu_name[cpu] = "Au1100"; |
1da177e4 LT |
1183 | break; |
1184 | case 3: | |
cea7e2df | 1185 | __cpu_name[cpu] = "Au1550"; |
1da177e4 | 1186 | break; |
e3ad1c23 | 1187 | case 4: |
cea7e2df | 1188 | __cpu_name[cpu] = "Au1200"; |
8ff374b9 | 1189 | if ((c->processor_id & PRID_REV_MASK) == 2) |
cea7e2df | 1190 | __cpu_name[cpu] = "Au1250"; |
237cfee1 ML |
1191 | break; |
1192 | case 5: | |
cea7e2df | 1193 | __cpu_name[cpu] = "Au1210"; |
e3ad1c23 | 1194 | break; |
1da177e4 | 1195 | default: |
270717a8 | 1196 | __cpu_name[cpu] = "Au1xxx"; |
1da177e4 LT |
1197 | break; |
1198 | } | |
1da177e4 LT |
1199 | break; |
1200 | } | |
1201 | } | |
1202 | ||
cea7e2df | 1203 | static inline void cpu_probe_sibyte(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 1204 | { |
4194318c | 1205 | decode_configs(c); |
02cf2119 | 1206 | |
4f12b91d | 1207 | c->writecombine = _CACHE_UNCACHED_ACCELERATED; |
8ff374b9 | 1208 | switch (c->processor_id & PRID_IMP_MASK) { |
1da177e4 LT |
1209 | case PRID_IMP_SB1: |
1210 | c->cputype = CPU_SB1; | |
cea7e2df | 1211 | __cpu_name[cpu] = "SiByte SB1"; |
1da177e4 | 1212 | /* FPU in pass1 is known to have issues. */ |
8ff374b9 | 1213 | if ((c->processor_id & PRID_REV_MASK) < 0x02) |
010b853b | 1214 | c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR); |
1da177e4 | 1215 | break; |
93ce2f52 AI |
1216 | case PRID_IMP_SB1A: |
1217 | c->cputype = CPU_SB1A; | |
cea7e2df | 1218 | __cpu_name[cpu] = "SiByte SB1A"; |
93ce2f52 | 1219 | break; |
1da177e4 LT |
1220 | } |
1221 | } | |
1222 | ||
cea7e2df | 1223 | static inline void cpu_probe_sandcraft(struct cpuinfo_mips *c, unsigned int cpu) |
1da177e4 | 1224 | { |
4194318c | 1225 | decode_configs(c); |
8ff374b9 | 1226 | switch (c->processor_id & PRID_IMP_MASK) { |
1da177e4 LT |
1227 | case PRID_IMP_SR71000: |
1228 | c->cputype = CPU_SR71000; | |
cea7e2df | 1229 | __cpu_name[cpu] = "Sandcraft SR71000"; |
1da177e4 LT |
1230 | c->scache.ways = 8; |
1231 | c->tlbsize = 64; | |
1232 | break; | |
1233 | } | |
1234 | } | |
1235 | ||
cea7e2df | 1236 | static inline void cpu_probe_nxp(struct cpuinfo_mips *c, unsigned int cpu) |
bdf21b18 PP |
1237 | { |
1238 | decode_configs(c); | |
8ff374b9 | 1239 | switch (c->processor_id & PRID_IMP_MASK) { |
bdf21b18 PP |
1240 | case PRID_IMP_PR4450: |
1241 | c->cputype = CPU_PR4450; | |
cea7e2df | 1242 | __cpu_name[cpu] = "Philips PR4450"; |
a96102be | 1243 | set_isa(c, MIPS_CPU_ISA_M32R1); |
bdf21b18 | 1244 | break; |
bdf21b18 PP |
1245 | } |
1246 | } | |
1247 | ||
cea7e2df | 1248 | static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu) |
1c0c13eb AJ |
1249 | { |
1250 | decode_configs(c); | |
8ff374b9 | 1251 | switch (c->processor_id & PRID_IMP_MASK) { |
190fca3e KC |
1252 | case PRID_IMP_BMIPS32_REV4: |
1253 | case PRID_IMP_BMIPS32_REV8: | |
602977b0 KC |
1254 | c->cputype = CPU_BMIPS32; |
1255 | __cpu_name[cpu] = "Broadcom BMIPS32"; | |
06785df0 | 1256 | set_elf_platform(cpu, "bmips32"); |
602977b0 KC |
1257 | break; |
1258 | case PRID_IMP_BMIPS3300: | |
1259 | case PRID_IMP_BMIPS3300_ALT: | |
1260 | case PRID_IMP_BMIPS3300_BUG: | |
1261 | c->cputype = CPU_BMIPS3300; | |
1262 | __cpu_name[cpu] = "Broadcom BMIPS3300"; | |
06785df0 | 1263 | set_elf_platform(cpu, "bmips3300"); |
602977b0 KC |
1264 | break; |
1265 | case PRID_IMP_BMIPS43XX: { | |
8ff374b9 | 1266 | int rev = c->processor_id & PRID_REV_MASK; |
602977b0 KC |
1267 | |
1268 | if (rev >= PRID_REV_BMIPS4380_LO && | |
1269 | rev <= PRID_REV_BMIPS4380_HI) { | |
1270 | c->cputype = CPU_BMIPS4380; | |
1271 | __cpu_name[cpu] = "Broadcom BMIPS4380"; | |
06785df0 | 1272 | set_elf_platform(cpu, "bmips4380"); |
602977b0 KC |
1273 | } else { |
1274 | c->cputype = CPU_BMIPS4350; | |
1275 | __cpu_name[cpu] = "Broadcom BMIPS4350"; | |
06785df0 | 1276 | set_elf_platform(cpu, "bmips4350"); |
602977b0 | 1277 | } |
0de663ef | 1278 | break; |
602977b0 KC |
1279 | } |
1280 | case PRID_IMP_BMIPS5000: | |
68e6a783 | 1281 | case PRID_IMP_BMIPS5200: |
602977b0 KC |
1282 | c->cputype = CPU_BMIPS5000; |
1283 | __cpu_name[cpu] = "Broadcom BMIPS5000"; | |
06785df0 | 1284 | set_elf_platform(cpu, "bmips5000"); |
602977b0 | 1285 | c->options |= MIPS_CPU_ULRI; |
0de663ef | 1286 | break; |
1c0c13eb AJ |
1287 | } |
1288 | } | |
1289 | ||
0dd4781b DD |
1290 | static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu) |
1291 | { | |
1292 | decode_configs(c); | |
8ff374b9 | 1293 | switch (c->processor_id & PRID_IMP_MASK) { |
0dd4781b DD |
1294 | case PRID_IMP_CAVIUM_CN38XX: |
1295 | case PRID_IMP_CAVIUM_CN31XX: | |
1296 | case PRID_IMP_CAVIUM_CN30XX: | |
6f329468 DD |
1297 | c->cputype = CPU_CAVIUM_OCTEON; |
1298 | __cpu_name[cpu] = "Cavium Octeon"; | |
1299 | goto platform; | |
0dd4781b DD |
1300 | case PRID_IMP_CAVIUM_CN58XX: |
1301 | case PRID_IMP_CAVIUM_CN56XX: | |
1302 | case PRID_IMP_CAVIUM_CN50XX: | |
1303 | case PRID_IMP_CAVIUM_CN52XX: | |
6f329468 DD |
1304 | c->cputype = CPU_CAVIUM_OCTEON_PLUS; |
1305 | __cpu_name[cpu] = "Cavium Octeon+"; | |
1306 | platform: | |
c094c99e | 1307 | set_elf_platform(cpu, "octeon"); |
0dd4781b | 1308 | break; |
a1431b61 | 1309 | case PRID_IMP_CAVIUM_CN61XX: |
0e56b385 | 1310 | case PRID_IMP_CAVIUM_CN63XX: |
a1431b61 DD |
1311 | case PRID_IMP_CAVIUM_CN66XX: |
1312 | case PRID_IMP_CAVIUM_CN68XX: | |
af04bb85 | 1313 | case PRID_IMP_CAVIUM_CNF71XX: |
0e56b385 DD |
1314 | c->cputype = CPU_CAVIUM_OCTEON2; |
1315 | __cpu_name[cpu] = "Cavium Octeon II"; | |
c094c99e | 1316 | set_elf_platform(cpu, "octeon2"); |
0e56b385 | 1317 | break; |
af04bb85 DD |
1318 | case PRID_IMP_CAVIUM_CN70XX: |
1319 | case PRID_IMP_CAVIUM_CN78XX: | |
1320 | c->cputype = CPU_CAVIUM_OCTEON3; | |
1321 | __cpu_name[cpu] = "Cavium Octeon III"; | |
1322 | set_elf_platform(cpu, "octeon3"); | |
1323 | break; | |
0dd4781b DD |
1324 | default: |
1325 | printk(KERN_INFO "Unknown Octeon chip!\n"); | |
1326 | c->cputype = CPU_UNKNOWN; | |
1327 | break; | |
1328 | } | |
1329 | } | |
1330 | ||
83ccf69d LPC |
1331 | static inline void cpu_probe_ingenic(struct cpuinfo_mips *c, unsigned int cpu) |
1332 | { | |
1333 | decode_configs(c); | |
1334 | /* JZRISC does not implement the CP0 counter. */ | |
1335 | c->options &= ~MIPS_CPU_COUNTER; | |
06947aaa | 1336 | BUG_ON(!__builtin_constant_p(cpu_has_counter) || cpu_has_counter); |
8ff374b9 | 1337 | switch (c->processor_id & PRID_IMP_MASK) { |
83ccf69d LPC |
1338 | case PRID_IMP_JZRISC: |
1339 | c->cputype = CPU_JZRISC; | |
4f12b91d | 1340 | c->writecombine = _CACHE_UNCACHED_ACCELERATED; |
83ccf69d LPC |
1341 | __cpu_name[cpu] = "Ingenic JZRISC"; |
1342 | break; | |
1343 | default: | |
1344 | panic("Unknown Ingenic Processor ID!"); | |
1345 | break; | |
1346 | } | |
1347 | } | |
1348 | ||
a7117c6b J |
1349 | static inline void cpu_probe_netlogic(struct cpuinfo_mips *c, int cpu) |
1350 | { | |
1351 | decode_configs(c); | |
1352 | ||
8ff374b9 | 1353 | if ((c->processor_id & PRID_IMP_MASK) == PRID_IMP_NETLOGIC_AU13XX) { |
809f36c6 ML |
1354 | c->cputype = CPU_ALCHEMY; |
1355 | __cpu_name[cpu] = "Au1300"; | |
1356 | /* following stuff is not for Alchemy */ | |
1357 | return; | |
1358 | } | |
1359 | ||
70342287 RB |
1360 | c->options = (MIPS_CPU_TLB | |
1361 | MIPS_CPU_4KEX | | |
a7117c6b | 1362 | MIPS_CPU_COUNTER | |
70342287 RB |
1363 | MIPS_CPU_DIVEC | |
1364 | MIPS_CPU_WATCH | | |
1365 | MIPS_CPU_EJTAG | | |
a7117c6b J |
1366 | MIPS_CPU_LLSC); |
1367 | ||
8ff374b9 | 1368 | switch (c->processor_id & PRID_IMP_MASK) { |
4ca86a2f | 1369 | case PRID_IMP_NETLOGIC_XLP2XX: |
8907c55e | 1370 | case PRID_IMP_NETLOGIC_XLP9XX: |
1c983986 | 1371 | case PRID_IMP_NETLOGIC_XLP5XX: |
4ca86a2f J |
1372 | c->cputype = CPU_XLP; |
1373 | __cpu_name[cpu] = "Broadcom XLPII"; | |
1374 | break; | |
1375 | ||
2aa54b20 J |
1376 | case PRID_IMP_NETLOGIC_XLP8XX: |
1377 | case PRID_IMP_NETLOGIC_XLP3XX: | |
a3d4fb2d J |
1378 | c->cputype = CPU_XLP; |
1379 | __cpu_name[cpu] = "Netlogic XLP"; | |
1380 | break; | |
1381 | ||
a7117c6b J |
1382 | case PRID_IMP_NETLOGIC_XLR732: |
1383 | case PRID_IMP_NETLOGIC_XLR716: | |
1384 | case PRID_IMP_NETLOGIC_XLR532: | |
1385 | case PRID_IMP_NETLOGIC_XLR308: | |
1386 | case PRID_IMP_NETLOGIC_XLR532C: | |
1387 | case PRID_IMP_NETLOGIC_XLR516C: | |
1388 | case PRID_IMP_NETLOGIC_XLR508C: | |
1389 | case PRID_IMP_NETLOGIC_XLR308C: | |
1390 | c->cputype = CPU_XLR; | |
1391 | __cpu_name[cpu] = "Netlogic XLR"; | |
1392 | break; | |
1393 | ||
1394 | case PRID_IMP_NETLOGIC_XLS608: | |
1395 | case PRID_IMP_NETLOGIC_XLS408: | |
1396 | case PRID_IMP_NETLOGIC_XLS404: | |
1397 | case PRID_IMP_NETLOGIC_XLS208: | |
1398 | case PRID_IMP_NETLOGIC_XLS204: | |
1399 | case PRID_IMP_NETLOGIC_XLS108: | |
1400 | case PRID_IMP_NETLOGIC_XLS104: | |
1401 | case PRID_IMP_NETLOGIC_XLS616B: | |
1402 | case PRID_IMP_NETLOGIC_XLS608B: | |
1403 | case PRID_IMP_NETLOGIC_XLS416B: | |
1404 | case PRID_IMP_NETLOGIC_XLS412B: | |
1405 | case PRID_IMP_NETLOGIC_XLS408B: | |
1406 | case PRID_IMP_NETLOGIC_XLS404B: | |
1407 | c->cputype = CPU_XLR; | |
1408 | __cpu_name[cpu] = "Netlogic XLS"; | |
1409 | break; | |
1410 | ||
1411 | default: | |
a3d4fb2d | 1412 | pr_info("Unknown Netlogic chip id [%02x]!\n", |
a7117c6b J |
1413 | c->processor_id); |
1414 | c->cputype = CPU_XLR; | |
1415 | break; | |
1416 | } | |
1417 | ||
a3d4fb2d | 1418 | if (c->cputype == CPU_XLP) { |
a96102be | 1419 | set_isa(c, MIPS_CPU_ISA_M64R2); |
a3d4fb2d J |
1420 | c->options |= (MIPS_CPU_FPU | MIPS_CPU_ULRI | MIPS_CPU_MCHECK); |
1421 | /* This will be updated again after all threads are woken up */ | |
1422 | c->tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1; | |
1423 | } else { | |
a96102be | 1424 | set_isa(c, MIPS_CPU_ISA_M64R1); |
a3d4fb2d J |
1425 | c->tlbsize = ((read_c0_config1() >> 25) & 0x3f) + 1; |
1426 | } | |
7777b939 | 1427 | c->kscratch_mask = 0xf; |
a7117c6b J |
1428 | } |
1429 | ||
949e51be DD |
1430 | #ifdef CONFIG_64BIT |
1431 | /* For use by uaccess.h */ | |
1432 | u64 __ua_limit; | |
1433 | EXPORT_SYMBOL(__ua_limit); | |
1434 | #endif | |
1435 | ||
9966db25 | 1436 | const char *__cpu_name[NR_CPUS]; |
874fd3b5 | 1437 | const char *__elf_platform; |
9966db25 | 1438 | |
078a55fc | 1439 | void cpu_probe(void) |
1da177e4 LT |
1440 | { |
1441 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
9966db25 | 1442 | unsigned int cpu = smp_processor_id(); |
1da177e4 | 1443 | |
70342287 | 1444 | c->processor_id = PRID_IMP_UNKNOWN; |
1da177e4 LT |
1445 | c->fpu_id = FPIR_IMP_NONE; |
1446 | c->cputype = CPU_UNKNOWN; | |
4f12b91d | 1447 | c->writecombine = _CACHE_UNCACHED; |
1da177e4 | 1448 | |
9b26616c MR |
1449 | c->fpu_csr31 = FPU_CSR_RN; |
1450 | c->fpu_msk31 = FPU_CSR_RSVD | FPU_CSR_ABS2008 | FPU_CSR_NAN2008; | |
1451 | ||
1da177e4 | 1452 | c->processor_id = read_c0_prid(); |
8ff374b9 | 1453 | switch (c->processor_id & PRID_COMP_MASK) { |
1da177e4 | 1454 | case PRID_COMP_LEGACY: |
cea7e2df | 1455 | cpu_probe_legacy(c, cpu); |
1da177e4 LT |
1456 | break; |
1457 | case PRID_COMP_MIPS: | |
cea7e2df | 1458 | cpu_probe_mips(c, cpu); |
1da177e4 LT |
1459 | break; |
1460 | case PRID_COMP_ALCHEMY: | |
cea7e2df | 1461 | cpu_probe_alchemy(c, cpu); |
1da177e4 LT |
1462 | break; |
1463 | case PRID_COMP_SIBYTE: | |
cea7e2df | 1464 | cpu_probe_sibyte(c, cpu); |
1da177e4 | 1465 | break; |
1c0c13eb | 1466 | case PRID_COMP_BROADCOM: |
cea7e2df | 1467 | cpu_probe_broadcom(c, cpu); |
1c0c13eb | 1468 | break; |
1da177e4 | 1469 | case PRID_COMP_SANDCRAFT: |
cea7e2df | 1470 | cpu_probe_sandcraft(c, cpu); |
1da177e4 | 1471 | break; |
a92b0588 | 1472 | case PRID_COMP_NXP: |
cea7e2df | 1473 | cpu_probe_nxp(c, cpu); |
a3dddd56 | 1474 | break; |
0dd4781b DD |
1475 | case PRID_COMP_CAVIUM: |
1476 | cpu_probe_cavium(c, cpu); | |
1477 | break; | |
252617a4 PB |
1478 | case PRID_COMP_INGENIC_D0: |
1479 | case PRID_COMP_INGENIC_D1: | |
1480 | case PRID_COMP_INGENIC_E1: | |
83ccf69d LPC |
1481 | cpu_probe_ingenic(c, cpu); |
1482 | break; | |
a7117c6b J |
1483 | case PRID_COMP_NETLOGIC: |
1484 | cpu_probe_netlogic(c, cpu); | |
1485 | break; | |
1da177e4 | 1486 | } |
dec8b1ca | 1487 | |
cea7e2df RB |
1488 | BUG_ON(!__cpu_name[cpu]); |
1489 | BUG_ON(c->cputype == CPU_UNKNOWN); | |
1490 | ||
dec8b1ca FBH |
1491 | /* |
1492 | * Platform code can force the cpu type to optimize code | |
1493 | * generation. In that case be sure the cpu type is correctly | |
1494 | * manually setup otherwise it could trigger some nasty bugs. | |
1495 | */ | |
1496 | BUG_ON(current_cpu_type() != c->cputype); | |
1497 | ||
0103d23f KC |
1498 | if (mips_fpu_disabled) |
1499 | c->options &= ~MIPS_CPU_FPU; | |
1500 | ||
1501 | if (mips_dsp_disabled) | |
ee80f7c7 | 1502 | c->ases &= ~(MIPS_ASE_DSP | MIPS_ASE_DSP2P); |
0103d23f | 1503 | |
3d528b32 MC |
1504 | if (mips_htw_disabled) { |
1505 | c->options &= ~MIPS_CPU_HTW; | |
1506 | write_c0_pwctl(read_c0_pwctl() & | |
1507 | ~(1 << MIPS_PWCTL_PWEN_SHIFT)); | |
1508 | } | |
1509 | ||
7aecd5ca MR |
1510 | if (c->options & MIPS_CPU_FPU) |
1511 | cpu_set_fpu_opts(c); | |
1512 | else | |
1513 | cpu_set_nofpu_opts(c); | |
9966db25 | 1514 | |
8d5ded16 JK |
1515 | if (cpu_has_bp_ghist) |
1516 | write_c0_r10k_diag(read_c0_r10k_diag() | | |
1517 | R10K_DIAG_E_GHIST); | |
1518 | ||
8b8aa636 | 1519 | if (cpu_has_mips_r2_r6) { |
f6771dbb | 1520 | c->srsets = ((read_c0_srsctl() >> 26) & 0x0f) + 1; |
da4b62cd AC |
1521 | /* R2 has Performance Counter Interrupt indicator */ |
1522 | c->options |= MIPS_CPU_PCI; | |
1523 | } | |
f6771dbb RB |
1524 | else |
1525 | c->srsets = 1; | |
91dfc423 | 1526 | |
4c063034 PB |
1527 | if (cpu_has_mips_r6) |
1528 | elf_hwcap |= HWCAP_MIPS_R6; | |
1529 | ||
a8ad1367 | 1530 | if (cpu_has_msa) { |
a5e9a69e | 1531 | c->msa_id = cpu_get_msa_id(); |
a8ad1367 PB |
1532 | WARN(c->msa_id & MSA_IR_WRPF, |
1533 | "Vector register partitioning unimplemented!"); | |
3cc9fa7f | 1534 | elf_hwcap |= HWCAP_MIPS_MSA; |
a8ad1367 | 1535 | } |
a5e9a69e | 1536 | |
91dfc423 | 1537 | cpu_probe_vmbits(c); |
949e51be DD |
1538 | |
1539 | #ifdef CONFIG_64BIT | |
1540 | if (cpu == 0) | |
1541 | __ua_limit = ~((1ull << cpu_vmbits) - 1); | |
1542 | #endif | |
1da177e4 LT |
1543 | } |
1544 | ||
078a55fc | 1545 | void cpu_report(void) |
1da177e4 LT |
1546 | { |
1547 | struct cpuinfo_mips *c = ¤t_cpu_data; | |
1548 | ||
d9f897c9 LY |
1549 | pr_info("CPU%d revision is: %08x (%s)\n", |
1550 | smp_processor_id(), c->processor_id, cpu_name_string()); | |
1da177e4 | 1551 | if (c->options & MIPS_CPU_FPU) |
9966db25 | 1552 | printk(KERN_INFO "FPU revision is: %08x\n", c->fpu_id); |
a5e9a69e PB |
1553 | if (cpu_has_msa) |
1554 | pr_info("MSA revision is: %08x\n", c->msa_id); | |
1da177e4 | 1555 | } |