1 /* $NetBSD: cpu.c,v 1.55 2004/02/13 11:36:10 wiz Exp $ */
2
3 /*-
4 * Copyright (c) 1995 Mark Brinicombe.
5 * Copyright (c) 1995 Brini.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Brini.
19 * 4. The name of the company nor the name of the author may be used to
20 * endorse or promote products derived from this software without specific
21 * prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * RiscBSD kernel project
36 *
37 * cpu.c
38 *
39 * Probing and configuration for the master CPU
40 *
41 * Created : 10/10/95
42 */
43
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/conf.h>
49 #include <sys/kernel.h>
50 #include <sys/sysctl.h>
51 #include <machine/cpu.h>
52 #include <machine/md_var.h>
53
54 char machine[] = "arm";
55
56 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
57 machine, 0, "Machine class");
58
59 static char cpu_model[64];
60 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
61 cpu_model, sizeof(cpu_model), "Machine model");
62
63 static char hw_buf[81];
64 static int hw_buf_idx;
65 static bool hw_buf_newline;
66
67 enum cpu_class cpu_class = CPU_CLASS_NONE;
68
69 static struct {
70 int implementer;
71 int part_number;
72 char *impl_name;
73 char *core_name;
74 enum cpu_class cpu_class;
75 } cpu_names[] = {
76 {CPU_IMPLEMENTER_ARM, CPU_ARCH_ARM1176, "ARM", "ARM1176",
77 CPU_CLASS_ARM11J},
78 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A5 , "ARM", "Cortex-A5",
79 CPU_CLASS_CORTEXA},
80 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A7 , "ARM", "Cortex-A7",
81 CPU_CLASS_CORTEXA},
82 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A8 , "ARM", "Cortex-A8",
83 CPU_CLASS_CORTEXA},
84 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A9 , "ARM", "Cortex-A9",
85 CPU_CLASS_CORTEXA},
86 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A12, "ARM", "Cortex-A12",
87 CPU_CLASS_CORTEXA},
88 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A15, "ARM", "Cortex-A15",
89 CPU_CLASS_CORTEXA},
90 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A17, "ARM", "Cortex-A17",
91 CPU_CLASS_CORTEXA},
92 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A53, "ARM", "Cortex-A53",
93 CPU_CLASS_CORTEXA},
94 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A57, "ARM", "Cortex-A57",
95 CPU_CLASS_CORTEXA},
96 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A72, "ARM", "Cortex-A72",
97 CPU_CLASS_CORTEXA},
98 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A73, "ARM", "Cortex-A73",
99 CPU_CLASS_CORTEXA},
100
101 {CPU_IMPLEMENTER_MRVL, CPU_ARCH_SHEEVA_581, "Marvell", "PJ4 v7",
102 CPU_CLASS_MARVELL},
103 {CPU_IMPLEMENTER_MRVL, CPU_ARCH_SHEEVA_584, "Marvell", "PJ4MP v7",
104 CPU_CLASS_MARVELL},
105
106 {CPU_IMPLEMENTER_QCOM, CPU_ARCH_KRAIT_300, "Qualcomm", "Krait 300",
107 CPU_CLASS_KRAIT},
108 };
109
110 static void
111 print_v5_cache(void)
112 {
113 uint32_t isize, dsize;
114 uint32_t multiplier;
115 int pcache_type;
116 int pcache_unified;
117 int picache_size;
118 int picache_line_size;
119 int picache_ways;
120 int pdcache_size;
121 int pdcache_line_size;
122 int pdcache_ways;
123
124 pcache_unified = 0;
125 picache_size = 0 ;
126 picache_line_size = 0 ;
127 picache_ways = 0 ;
128 pdcache_size = 0;
129 pdcache_line_size = 0;
130 pdcache_ways = 0;
131
132 if ((cpuinfo.ctr & CPU_CT_S) == 0)
133 pcache_unified = 1;
134
135 /*
136 * If you want to know how this code works, go read the ARM ARM.
137 */
138 pcache_type = CPU_CT_CTYPE(cpuinfo.ctr);
139
140 if (pcache_unified == 0) {
141 isize = CPU_CT_ISIZE(cpuinfo.ctr);
142 multiplier = (isize & CPU_CT_xSIZE_M) ? 3 : 2;
143 picache_line_size = 1U << (CPU_CT_xSIZE_LEN(isize) + 3);
144 if (CPU_CT_xSIZE_ASSOC(isize) == 0) {
145 if (isize & CPU_CT_xSIZE_M)
146 picache_line_size = 0; /* not present */
147 else
148 picache_ways = 1;
149 } else {
150 picache_ways = multiplier <<
151 (CPU_CT_xSIZE_ASSOC(isize) - 1);
152 }
153 picache_size = multiplier << (CPU_CT_xSIZE_SIZE(isize) + 8);
154 }
155
156 dsize = CPU_CT_DSIZE(cpuinfo.ctr);
157 multiplier = (dsize & CPU_CT_xSIZE_M) ? 3 : 2;
158 pdcache_line_size = 1U << (CPU_CT_xSIZE_LEN(dsize) + 3);
159 if (CPU_CT_xSIZE_ASSOC(dsize) == 0) {
160 if (dsize & CPU_CT_xSIZE_M)
161 pdcache_line_size = 0; /* not present */
162 else
163 pdcache_ways = 1;
164 } else {
165 pdcache_ways = multiplier <<
166 (CPU_CT_xSIZE_ASSOC(dsize) - 1);
167 }
168 pdcache_size = multiplier << (CPU_CT_xSIZE_SIZE(dsize) + 8);
169
170 /* Print cache info. */
171 if (picache_line_size == 0 && pdcache_line_size == 0)
172 return;
173
174 if (pcache_unified) {
175 printf(" %dKB/%dB %d-way %s unified cache\n",
176 pdcache_size / 1024,
177 pdcache_line_size, pdcache_ways,
178 pcache_type == 0 ? "WT" : "WB");
179 } else {
180 printf(" %dKB/%dB %d-way instruction cache\n",
181 picache_size / 1024,
182 picache_line_size, picache_ways);
183 printf(" %dKB/%dB %d-way %s data cache\n",
184 pdcache_size / 1024,
185 pdcache_line_size, pdcache_ways,
186 pcache_type == 0 ? "WT" : "WB");
187 }
188 }
189
190 static void
191 print_v7_cache(void )
192 {
193 uint32_t type, val, size, sets, ways, linesize;
194 int i;
195
196 printf("LoUU:%d LoC:%d LoUIS:%d \n",
197 CPU_CLIDR_LOUU(cpuinfo.clidr) + 1,
198 CPU_CLIDR_LOC(cpuinfo.clidr) + 1,
199 CPU_CLIDR_LOUIS(cpuinfo.clidr) + 1);
200
201 for (i = 0; i < 7; i++) {
202 type = CPU_CLIDR_CTYPE(cpuinfo.clidr, i);
203 if (type == 0)
204 break;
205 printf("Cache level %d:\n", i + 1);
206 if (type == CACHE_DCACHE || type == CACHE_UNI_CACHE ||
207 type == CACHE_SEP_CACHE) {
208 cp15_csselr_set(i << 1);
209 val = cp15_ccsidr_get();
210 ways = CPUV7_CT_xSIZE_ASSOC(val) + 1;
211 sets = CPUV7_CT_xSIZE_SET(val) + 1;
212 linesize = 1 << (CPUV7_CT_xSIZE_LEN(val) + 4);
213 size = (ways * sets * linesize) / 1024;
214
215 if (type == CACHE_UNI_CACHE)
216 printf(" %dKB/%dB %d-way unified cache",
217 size, linesize,ways);
218 else
219 printf(" %dKB/%dB %d-way data cache",
220 size, linesize, ways);
221 if (val & CPUV7_CT_CTYPE_WT)
222 printf(" WT");
223 if (val & CPUV7_CT_CTYPE_WB)
224 printf(" WB");
225 if (val & CPUV7_CT_CTYPE_RA)
226 printf(" Read-Alloc");
227 if (val & CPUV7_CT_CTYPE_WA)
228 printf(" Write-Alloc");
229 printf("\n");
230 }
231
232 if (type == CACHE_ICACHE || type == CACHE_SEP_CACHE) {
233 cp15_csselr_set(i << 1 | 1);
234 val = cp15_ccsidr_get();
235 ways = CPUV7_CT_xSIZE_ASSOC(val) + 1;
236 sets = CPUV7_CT_xSIZE_SET(val) + 1;
237 linesize = 1 << (CPUV7_CT_xSIZE_LEN(val) + 4);
238 size = (ways * sets * linesize) / 1024;
239 printf(" %dKB/%dB %d-way instruction cache",
240 size, linesize, ways);
241 if (val & CPUV7_CT_CTYPE_WT)
242 printf(" WT");
243 if (val & CPUV7_CT_CTYPE_WB)
244 printf(" WB");
245 if (val & CPUV7_CT_CTYPE_RA)
246 printf(" Read-Alloc");
247 if (val & CPUV7_CT_CTYPE_WA)
248 printf(" Write-Alloc");
249 printf("\n");
250 }
251 }
252 cp15_csselr_set(0);
253 }
254
255 static void
256 add_cap(char *cap)
257 {
258 int len;
259
260 len = strlen(cap);
261
262 if ((hw_buf_idx + len + 2) >= 79) {
263 printf("%s,\n", hw_buf);
264 hw_buf_idx = 0;
265 hw_buf_newline = true;
266 }
267 if (hw_buf_newline)
268 hw_buf_idx += sprintf(hw_buf + hw_buf_idx, " ");
269 else
270 hw_buf_idx += sprintf(hw_buf + hw_buf_idx, ", ");
271 hw_buf_newline = false;
272
273 hw_buf_idx += sprintf(hw_buf + hw_buf_idx, "%s", cap);
274 }
275
276 void
277 identify_arm_cpu(void)
278 {
279 int i;
280 u_int val;
281
282 /*
283 * CPU
284 */
285 for(i = 0; i < nitems(cpu_names); i++) {
286 if (cpu_names[i].implementer == cpuinfo.implementer &&
287 cpu_names[i].part_number == cpuinfo.part_number) {
288 cpu_class = cpu_names[i].cpu_class;
289 snprintf(cpu_model, sizeof(cpu_model),
290 "%s %s r%dp%d (ECO: 0x%08X)",
291 cpu_names[i].impl_name, cpu_names[i].core_name,
292 cpuinfo.revision, cpuinfo.patch,
293 cpuinfo.midr != cpuinfo.revidr ?
294 cpuinfo.revidr : 0);
295 printf("CPU: %s\n", cpu_model);
296 break;
297 }
298 }
299 if (i >= nitems(cpu_names))
300 printf("unknown CPU (ID = 0x%x)\n", cpuinfo.midr);
301
302 printf("CPU Features: \n");
303 hw_buf_idx = 0;
304 hw_buf_newline = true;
305
306 val = (cpuinfo.mpidr >> 4)& 0xF;
307 if (cpuinfo.mpidr & (1 << 31U))
308 add_cap("Multiprocessing");
309 val = (cpuinfo.id_pfr0 >> 4)& 0xF;
310 if (val == 1)
311 add_cap("Thumb");
312 else if (val == 3)
313 add_cap("Thumb2");
314
315 val = (cpuinfo.id_pfr1 >> 4)& 0xF;
316 if (val == 1 || val == 2)
317 add_cap("Security");
318
319 val = (cpuinfo.id_pfr1 >> 12)& 0xF;
320 if (val == 1)
321 add_cap("Virtualization");
322
323 val = (cpuinfo.id_pfr1 >> 16)& 0xF;
324 if (val == 1)
325 add_cap("Generic Timer");
326
327 val = (cpuinfo.id_mmfr0 >> 0)& 0xF;
328 if (val == 2) {
329 add_cap("VMSAv6");
330 } else if (val >= 3) {
331 add_cap("VMSAv7");
332 if (val >= 4)
333 add_cap("PXN");
334 if (val >= 5)
335 add_cap("LPAE");
336 }
337
338 val = (cpuinfo.id_mmfr3 >> 20)& 0xF;
339 if (val == 1)
340 add_cap("Coherent Walk");
341
342 if (hw_buf_idx != 0)
343 printf("%s\n", hw_buf);
344
345 printf("Optional instructions: \n");
346 hw_buf_idx = 0;
347 hw_buf_newline = true;
348 val = (cpuinfo.id_isar0 >> 24)& 0xF;
349 if (val == 1)
350 add_cap("SDIV/UDIV (Thumb)");
351 else if (val == 2)
352 add_cap("SDIV/UDIV");
353
354 val = (cpuinfo.id_isar2 >> 20)& 0xF;
355 if (val == 1 || val == 2)
356 add_cap("UMULL");
357
358 val = (cpuinfo.id_isar2 >> 16)& 0xF;
359 if (val == 1 || val == 2 || val == 3)
360 add_cap("SMULL");
361
362 val = (cpuinfo.id_isar2 >> 12)& 0xF;
363 if (val == 1)
364 add_cap("MLA");
365
366 val = (cpuinfo.id_isar3 >> 4)& 0xF;
367 if (val == 1)
368 add_cap("SIMD");
369 else if (val == 3)
370 add_cap("SIMD(ext)");
371 if (hw_buf_idx != 0)
372 printf("%s\n", hw_buf);
373
374 /*
375 * Cache
376 */
377 if (CPU_CT_FORMAT(cpuinfo.ctr) == CPU_CT_ARMV7)
378 print_v7_cache();
379 else
380 print_v5_cache();
381 }
Cache object: e74f28d7cafebc423bf0f1b2c1cd8ce9
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