Commit | Line | Data |
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54176736 RB |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
937a8015 | 6 | * Copyright (C) 2004, 05, 06 by Ralf Baechle |
54176736 RB |
7 | * Copyright (C) 2005 by MIPS Technologies, Inc. |
8 | */ | |
5e2862eb | 9 | #include <linux/cpumask.h> |
54176736 RB |
10 | #include <linux/oprofile.h> |
11 | #include <linux/interrupt.h> | |
12 | #include <linux/smp.h> | |
937a8015 | 13 | #include <asm/irq_regs.h> |
a669efc4 | 14 | #include <asm/time.h> |
54176736 RB |
15 | |
16 | #include "op_impl.h" | |
17 | ||
70342287 RB |
18 | #define M_PERFCTL_EXL (1UL << 0) |
19 | #define M_PERFCTL_KERNEL (1UL << 1) | |
20 | #define M_PERFCTL_SUPERVISOR (1UL << 2) | |
21 | #define M_PERFCTL_USER (1UL << 3) | |
22 | #define M_PERFCTL_INTERRUPT_ENABLE (1UL << 4) | |
39a51109 | 23 | #define M_PERFCTL_EVENT(event) (((event) & 0x3ff) << 5) |
70342287 | 24 | #define M_PERFCTL_VPEID(vpe) ((vpe) << 16) |
92c7b62f | 25 | #define M_PERFCTL_MT_EN(filter) ((filter) << 20) |
70342287 RB |
26 | #define M_TC_EN_ALL M_PERFCTL_MT_EN(0) |
27 | #define M_TC_EN_VPE M_PERFCTL_MT_EN(1) | |
28 | #define M_TC_EN_TC M_PERFCTL_MT_EN(2) | |
29 | #define M_PERFCTL_TCID(tcid) ((tcid) << 22) | |
30 | #define M_PERFCTL_WIDE (1UL << 30) | |
31 | #define M_PERFCTL_MORE (1UL << 31) | |
92c7b62f | 32 | |
70342287 | 33 | #define M_COUNTER_OVERFLOW (1UL << 31) |
92c7b62f | 34 | |
c783390a | 35 | /* Netlogic XLR specific, count events in all threads in a core */ |
70342287 | 36 | #define M_PERFCTL_COUNT_ALL_THREADS (1UL << 13) |
c783390a | 37 | |
46684734 | 38 | static int (*save_perf_irq)(void); |
a669efc4 | 39 | static int perfcount_irq; |
46684734 | 40 | |
c783390a MB |
41 | /* |
42 | * XLR has only one set of counters per core. Designate the | |
43 | * first hardware thread in the core for setup and init. | |
44 | * Skip CPUs with non-zero hardware thread id (4 hwt per core) | |
45 | */ | |
83a18415 | 46 | #if defined(CONFIG_CPU_XLR) && defined(CONFIG_SMP) |
c783390a MB |
47 | #define oprofile_skip_cpu(c) ((cpu_logical_map(c) & 0x3) != 0) |
48 | #else | |
49 | #define oprofile_skip_cpu(c) 0 | |
50 | #endif | |
51 | ||
92c7b62f | 52 | #ifdef CONFIG_MIPS_MT_SMP |
39b8d525 RB |
53 | static int cpu_has_mipsmt_pertccounters; |
54 | #define WHAT (M_TC_EN_VPE | \ | |
55 | M_PERFCTL_VPEID(cpu_data[smp_processor_id()].vpe_id)) | |
56 | #define vpe_id() (cpu_has_mipsmt_pertccounters ? \ | |
57 | 0 : cpu_data[smp_processor_id()].vpe_id) | |
5e2862eb RB |
58 | |
59 | /* | |
60 | * The number of bits to shift to convert between counters per core and | |
61 | * counters per VPE. There is no reasonable interface atm to obtain the | |
62 | * number of VPEs used by Linux and in the 34K this number is fixed to two | |
63 | * anyways so we hardcore a few things here for the moment. The way it's | |
64 | * done here will ensure that oprofile VSMP kernel will run right on a lesser | |
65 | * core like a 24K also or with maxcpus=1. | |
66 | */ | |
67 | static inline unsigned int vpe_shift(void) | |
68 | { | |
69 | if (num_possible_cpus() > 1) | |
70 | return 1; | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
92c7b62f | 75 | #else |
5e2862eb | 76 | |
be609f35 | 77 | #define WHAT 0 |
6f4c5bde | 78 | #define vpe_id() 0 |
5e2862eb RB |
79 | |
80 | static inline unsigned int vpe_shift(void) | |
81 | { | |
82 | return 0; | |
83 | } | |
84 | ||
92c7b62f | 85 | #endif |
54176736 | 86 | |
5e2862eb RB |
87 | static inline unsigned int counters_total_to_per_cpu(unsigned int counters) |
88 | { | |
89 | return counters >> vpe_shift(); | |
90 | } | |
91 | ||
92 | static inline unsigned int counters_per_cpu_to_total(unsigned int counters) | |
93 | { | |
94 | return counters << vpe_shift(); | |
95 | } | |
96 | ||
92c7b62f RB |
97 | #define __define_perf_accessors(r, n, np) \ |
98 | \ | |
99 | static inline unsigned int r_c0_ ## r ## n(void) \ | |
100 | { \ | |
be609f35 | 101 | unsigned int cpu = vpe_id(); \ |
92c7b62f RB |
102 | \ |
103 | switch (cpu) { \ | |
104 | case 0: \ | |
105 | return read_c0_ ## r ## n(); \ | |
106 | case 1: \ | |
107 | return read_c0_ ## r ## np(); \ | |
108 | default: \ | |
109 | BUG(); \ | |
110 | } \ | |
30f244ae | 111 | return 0; \ |
92c7b62f RB |
112 | } \ |
113 | \ | |
114 | static inline void w_c0_ ## r ## n(unsigned int value) \ | |
115 | { \ | |
be609f35 | 116 | unsigned int cpu = vpe_id(); \ |
92c7b62f RB |
117 | \ |
118 | switch (cpu) { \ | |
119 | case 0: \ | |
120 | write_c0_ ## r ## n(value); \ | |
121 | return; \ | |
122 | case 1: \ | |
123 | write_c0_ ## r ## np(value); \ | |
124 | return; \ | |
125 | default: \ | |
126 | BUG(); \ | |
127 | } \ | |
30f244ae | 128 | return; \ |
92c7b62f RB |
129 | } \ |
130 | ||
131 | __define_perf_accessors(perfcntr, 0, 2) | |
132 | __define_perf_accessors(perfcntr, 1, 3) | |
795a2258 CD |
133 | __define_perf_accessors(perfcntr, 2, 0) |
134 | __define_perf_accessors(perfcntr, 3, 1) | |
92c7b62f RB |
135 | |
136 | __define_perf_accessors(perfctrl, 0, 2) | |
137 | __define_perf_accessors(perfctrl, 1, 3) | |
795a2258 CD |
138 | __define_perf_accessors(perfctrl, 2, 0) |
139 | __define_perf_accessors(perfctrl, 3, 1) | |
54176736 | 140 | |
1acf1ca7 | 141 | struct op_mips_model op_model_mipsxx_ops; |
54176736 RB |
142 | |
143 | static struct mipsxx_register_config { | |
144 | unsigned int control[4]; | |
145 | unsigned int counter[4]; | |
146 | } reg; | |
147 | ||
70342287 | 148 | /* Compute all of the registers in preparation for enabling profiling. */ |
54176736 RB |
149 | |
150 | static void mipsxx_reg_setup(struct op_counter_config *ctr) | |
151 | { | |
1acf1ca7 | 152 | unsigned int counters = op_model_mipsxx_ops.num_counters; |
54176736 RB |
153 | int i; |
154 | ||
155 | /* Compute the performance counter control word. */ | |
54176736 RB |
156 | for (i = 0; i < counters; i++) { |
157 | reg.control[i] = 0; | |
158 | reg.counter[i] = 0; | |
159 | ||
160 | if (!ctr[i].enabled) | |
161 | continue; | |
162 | ||
163 | reg.control[i] = M_PERFCTL_EVENT(ctr[i].event) | | |
70342287 | 164 | M_PERFCTL_INTERRUPT_ENABLE; |
54176736 RB |
165 | if (ctr[i].kernel) |
166 | reg.control[i] |= M_PERFCTL_KERNEL; | |
167 | if (ctr[i].user) | |
168 | reg.control[i] |= M_PERFCTL_USER; | |
169 | if (ctr[i].exl) | |
170 | reg.control[i] |= M_PERFCTL_EXL; | |
cf5b2d23 | 171 | if (boot_cpu_type() == CPU_XLR) |
c783390a | 172 | reg.control[i] |= M_PERFCTL_COUNT_ALL_THREADS; |
54176736 RB |
173 | reg.counter[i] = 0x80000000 - ctr[i].count; |
174 | } | |
175 | } | |
176 | ||
70342287 | 177 | /* Program all of the registers in preparation for enabling profiling. */ |
54176736 | 178 | |
49a89efb | 179 | static void mipsxx_cpu_setup(void *args) |
54176736 | 180 | { |
1acf1ca7 | 181 | unsigned int counters = op_model_mipsxx_ops.num_counters; |
54176736 | 182 | |
c783390a MB |
183 | if (oprofile_skip_cpu(smp_processor_id())) |
184 | return; | |
185 | ||
54176736 RB |
186 | switch (counters) { |
187 | case 4: | |
92c7b62f RB |
188 | w_c0_perfctrl3(0); |
189 | w_c0_perfcntr3(reg.counter[3]); | |
54176736 | 190 | case 3: |
92c7b62f RB |
191 | w_c0_perfctrl2(0); |
192 | w_c0_perfcntr2(reg.counter[2]); | |
54176736 | 193 | case 2: |
92c7b62f RB |
194 | w_c0_perfctrl1(0); |
195 | w_c0_perfcntr1(reg.counter[1]); | |
54176736 | 196 | case 1: |
92c7b62f RB |
197 | w_c0_perfctrl0(0); |
198 | w_c0_perfcntr0(reg.counter[0]); | |
54176736 RB |
199 | } |
200 | } | |
201 | ||
202 | /* Start all counters on current CPU */ | |
203 | static void mipsxx_cpu_start(void *args) | |
204 | { | |
1acf1ca7 | 205 | unsigned int counters = op_model_mipsxx_ops.num_counters; |
54176736 | 206 | |
c783390a MB |
207 | if (oprofile_skip_cpu(smp_processor_id())) |
208 | return; | |
209 | ||
54176736 RB |
210 | switch (counters) { |
211 | case 4: | |
92c7b62f | 212 | w_c0_perfctrl3(WHAT | reg.control[3]); |
54176736 | 213 | case 3: |
92c7b62f | 214 | w_c0_perfctrl2(WHAT | reg.control[2]); |
54176736 | 215 | case 2: |
92c7b62f | 216 | w_c0_perfctrl1(WHAT | reg.control[1]); |
54176736 | 217 | case 1: |
92c7b62f | 218 | w_c0_perfctrl0(WHAT | reg.control[0]); |
54176736 RB |
219 | } |
220 | } | |
221 | ||
222 | /* Stop all counters on current CPU */ | |
223 | static void mipsxx_cpu_stop(void *args) | |
224 | { | |
1acf1ca7 | 225 | unsigned int counters = op_model_mipsxx_ops.num_counters; |
54176736 | 226 | |
c783390a MB |
227 | if (oprofile_skip_cpu(smp_processor_id())) |
228 | return; | |
229 | ||
54176736 RB |
230 | switch (counters) { |
231 | case 4: | |
92c7b62f | 232 | w_c0_perfctrl3(0); |
54176736 | 233 | case 3: |
92c7b62f | 234 | w_c0_perfctrl2(0); |
54176736 | 235 | case 2: |
92c7b62f | 236 | w_c0_perfctrl1(0); |
54176736 | 237 | case 1: |
92c7b62f | 238 | w_c0_perfctrl0(0); |
54176736 RB |
239 | } |
240 | } | |
241 | ||
937a8015 | 242 | static int mipsxx_perfcount_handler(void) |
54176736 | 243 | { |
1acf1ca7 | 244 | unsigned int counters = op_model_mipsxx_ops.num_counters; |
54176736 RB |
245 | unsigned int control; |
246 | unsigned int counter; | |
ffe9ee47 CD |
247 | int handled = IRQ_NONE; |
248 | ||
3ba5040a | 249 | if (cpu_has_mips_r2 && !(read_c0_cause() & CAUSEF_PCI)) |
ffe9ee47 | 250 | return handled; |
54176736 RB |
251 | |
252 | switch (counters) { | |
253 | #define HANDLE_COUNTER(n) \ | |
254 | case n + 1: \ | |
92c7b62f RB |
255 | control = r_c0_perfctrl ## n(); \ |
256 | counter = r_c0_perfcntr ## n(); \ | |
54176736 RB |
257 | if ((control & M_PERFCTL_INTERRUPT_ENABLE) && \ |
258 | (counter & M_COUNTER_OVERFLOW)) { \ | |
937a8015 | 259 | oprofile_add_sample(get_irq_regs(), n); \ |
92c7b62f | 260 | w_c0_perfcntr ## n(reg.counter[n]); \ |
ffe9ee47 | 261 | handled = IRQ_HANDLED; \ |
54176736 RB |
262 | } |
263 | HANDLE_COUNTER(3) | |
264 | HANDLE_COUNTER(2) | |
265 | HANDLE_COUNTER(1) | |
266 | HANDLE_COUNTER(0) | |
267 | } | |
ba339c03 RB |
268 | |
269 | return handled; | |
54176736 RB |
270 | } |
271 | ||
92c7b62f | 272 | static inline int __n_counters(void) |
54176736 | 273 | { |
30228c40 | 274 | if (!cpu_has_perf) |
54176736 | 275 | return 0; |
39b8d525 | 276 | if (!(read_c0_perfctrl0() & M_PERFCTL_MORE)) |
54176736 | 277 | return 1; |
39b8d525 | 278 | if (!(read_c0_perfctrl1() & M_PERFCTL_MORE)) |
54176736 | 279 | return 2; |
39b8d525 | 280 | if (!(read_c0_perfctrl2() & M_PERFCTL_MORE)) |
54176736 RB |
281 | return 3; |
282 | ||
283 | return 4; | |
284 | } | |
285 | ||
92c7b62f RB |
286 | static inline int n_counters(void) |
287 | { | |
714cfe78 RB |
288 | int counters; |
289 | ||
10cc3529 | 290 | switch (current_cpu_type()) { |
714cfe78 RB |
291 | case CPU_R10000: |
292 | counters = 2; | |
148171b2 | 293 | break; |
714cfe78 RB |
294 | |
295 | case CPU_R12000: | |
296 | case CPU_R14000: | |
30577391 | 297 | case CPU_R16000: |
714cfe78 | 298 | counters = 4; |
148171b2 | 299 | break; |
714cfe78 RB |
300 | |
301 | default: | |
302 | counters = __n_counters(); | |
303 | } | |
92c7b62f | 304 | |
92c7b62f RB |
305 | return counters; |
306 | } | |
307 | ||
39b8d525 | 308 | static void reset_counters(void *arg) |
54176736 | 309 | { |
005ca9a3 | 310 | int counters = (int)(long)arg; |
54176736 RB |
311 | switch (counters) { |
312 | case 4: | |
92c7b62f RB |
313 | w_c0_perfctrl3(0); |
314 | w_c0_perfcntr3(0); | |
54176736 | 315 | case 3: |
92c7b62f RB |
316 | w_c0_perfctrl2(0); |
317 | w_c0_perfcntr2(0); | |
54176736 | 318 | case 2: |
92c7b62f RB |
319 | w_c0_perfctrl1(0); |
320 | w_c0_perfcntr1(0); | |
54176736 | 321 | case 1: |
92c7b62f RB |
322 | w_c0_perfctrl0(0); |
323 | w_c0_perfcntr0(0); | |
54176736 RB |
324 | } |
325 | } | |
326 | ||
3572a2c3 FF |
327 | static irqreturn_t mipsxx_perfcount_int(int irq, void *dev_id) |
328 | { | |
329 | return mipsxx_perfcount_handler(); | |
330 | } | |
331 | ||
54176736 RB |
332 | static int __init mipsxx_init(void) |
333 | { | |
334 | int counters; | |
335 | ||
336 | counters = n_counters(); | |
9efeae9a RB |
337 | if (counters == 0) { |
338 | printk(KERN_ERR "Oprofile: CPU has no performance counters\n"); | |
54176736 | 339 | return -ENODEV; |
9efeae9a | 340 | } |
54176736 | 341 | |
39b8d525 RB |
342 | #ifdef CONFIG_MIPS_MT_SMP |
343 | cpu_has_mipsmt_pertccounters = read_c0_config7() & (1<<19); | |
344 | if (!cpu_has_mipsmt_pertccounters) | |
345 | counters = counters_total_to_per_cpu(counters); | |
346 | #endif | |
f6f88e9b | 347 | on_each_cpu(reset_counters, (void *)(long)counters, 1); |
795a2258 | 348 | |
1acf1ca7 | 349 | op_model_mipsxx_ops.num_counters = counters; |
10cc3529 | 350 | switch (current_cpu_type()) { |
113c62d9 SH |
351 | case CPU_M14KC: |
352 | op_model_mipsxx_ops.cpu_type = "mips/M14Kc"; | |
353 | break; | |
354 | ||
f8fa4811 SH |
355 | case CPU_M14KEC: |
356 | op_model_mipsxx_ops.cpu_type = "mips/M14KEc"; | |
357 | break; | |
358 | ||
2065988e | 359 | case CPU_20KC: |
1acf1ca7 | 360 | op_model_mipsxx_ops.cpu_type = "mips/20K"; |
2065988e RB |
361 | break; |
362 | ||
54176736 | 363 | case CPU_24K: |
1acf1ca7 | 364 | op_model_mipsxx_ops.cpu_type = "mips/24K"; |
54176736 RB |
365 | break; |
366 | ||
2065988e | 367 | case CPU_25KF: |
1acf1ca7 | 368 | op_model_mipsxx_ops.cpu_type = "mips/25K"; |
2065988e RB |
369 | break; |
370 | ||
39b8d525 | 371 | case CPU_1004K: |
fcfd980c | 372 | case CPU_34K: |
1acf1ca7 | 373 | op_model_mipsxx_ops.cpu_type = "mips/34K"; |
fcfd980c | 374 | break; |
c620953c | 375 | |
442e14a2 | 376 | case CPU_1074K: |
c620953c | 377 | case CPU_74K: |
1acf1ca7 | 378 | op_model_mipsxx_ops.cpu_type = "mips/74K"; |
c620953c | 379 | break; |
fcfd980c | 380 | |
26ab96df LY |
381 | case CPU_INTERAPTIV: |
382 | op_model_mipsxx_ops.cpu_type = "mips/interAptiv"; | |
383 | break; | |
384 | ||
708ac4b8 LY |
385 | case CPU_PROAPTIV: |
386 | op_model_mipsxx_ops.cpu_type = "mips/proAptiv"; | |
387 | break; | |
388 | ||
8c7f6ba3 JH |
389 | case CPU_P5600: |
390 | op_model_mipsxx_ops.cpu_type = "mips/P5600"; | |
391 | break; | |
392 | ||
4e88a862 MC |
393 | case CPU_I6400: |
394 | op_model_mipsxx_ops.cpu_type = "mips/I6400"; | |
395 | break; | |
396 | ||
f36c4720 LY |
397 | case CPU_M5150: |
398 | op_model_mipsxx_ops.cpu_type = "mips/M5150"; | |
399 | break; | |
400 | ||
2065988e | 401 | case CPU_5KC: |
1acf1ca7 | 402 | op_model_mipsxx_ops.cpu_type = "mips/5K"; |
2065988e RB |
403 | break; |
404 | ||
714cfe78 RB |
405 | case CPU_R10000: |
406 | if ((current_cpu_data.processor_id & 0xff) == 0x20) | |
407 | op_model_mipsxx_ops.cpu_type = "mips/r10000-v2.x"; | |
408 | else | |
409 | op_model_mipsxx_ops.cpu_type = "mips/r10000"; | |
410 | break; | |
411 | ||
412 | case CPU_R12000: | |
413 | case CPU_R14000: | |
414 | op_model_mipsxx_ops.cpu_type = "mips/r12000"; | |
415 | break; | |
416 | ||
30577391 JK |
417 | case CPU_R16000: |
418 | op_model_mipsxx_ops.cpu_type = "mips/r16000"; | |
419 | break; | |
420 | ||
c03bc121 MM |
421 | case CPU_SB1: |
422 | case CPU_SB1A: | |
1acf1ca7 | 423 | op_model_mipsxx_ops.cpu_type = "mips/sb1"; |
c03bc121 MM |
424 | break; |
425 | ||
2fa36399 KC |
426 | case CPU_LOONGSON1: |
427 | op_model_mipsxx_ops.cpu_type = "mips/loongson1"; | |
428 | break; | |
429 | ||
c783390a MB |
430 | case CPU_XLR: |
431 | op_model_mipsxx_ops.cpu_type = "mips/xlr"; | |
432 | break; | |
433 | ||
54176736 RB |
434 | default: |
435 | printk(KERN_ERR "Profiling unsupported for this CPU\n"); | |
436 | ||
437 | return -ENODEV; | |
438 | } | |
439 | ||
46684734 | 440 | save_perf_irq = perf_irq; |
54176736 RB |
441 | perf_irq = mipsxx_perfcount_handler; |
442 | ||
a669efc4 AB |
443 | if (get_c0_perfcount_int) |
444 | perfcount_irq = get_c0_perfcount_int(); | |
7eca5b14 | 445 | else if (cp0_perfcount_irq >= 0) |
a669efc4 AB |
446 | perfcount_irq = MIPS_CPU_IRQ_BASE + cp0_perfcount_irq; |
447 | else | |
448 | perfcount_irq = -1; | |
449 | ||
450 | if (perfcount_irq >= 0) | |
451 | return request_irq(perfcount_irq, mipsxx_perfcount_int, | |
369a93bb JH |
452 | IRQF_PERCPU | IRQF_NOBALANCING | |
453 | IRQF_NO_THREAD | IRQF_NO_SUSPEND | | |
454 | IRQF_SHARED, | |
455 | "Perfcounter", save_perf_irq); | |
3572a2c3 | 456 | |
54176736 RB |
457 | return 0; |
458 | } | |
459 | ||
460 | static void mipsxx_exit(void) | |
461 | { | |
795a2258 | 462 | int counters = op_model_mipsxx_ops.num_counters; |
5e2862eb | 463 | |
a669efc4 AB |
464 | if (perfcount_irq >= 0) |
465 | free_irq(perfcount_irq, save_perf_irq); | |
3572a2c3 | 466 | |
5e2862eb | 467 | counters = counters_per_cpu_to_total(counters); |
f6f88e9b | 468 | on_each_cpu(reset_counters, (void *)(long)counters, 1); |
54176736 | 469 | |
46684734 | 470 | perf_irq = save_perf_irq; |
54176736 RB |
471 | } |
472 | ||
1acf1ca7 | 473 | struct op_mips_model op_model_mipsxx_ops = { |
54176736 RB |
474 | .reg_setup = mipsxx_reg_setup, |
475 | .cpu_setup = mipsxx_cpu_setup, | |
476 | .init = mipsxx_init, | |
477 | .exit = mipsxx_exit, | |
478 | .cpu_start = mipsxx_cpu_start, | |
479 | .cpu_stop = mipsxx_cpu_stop, | |
480 | }; |