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1da177e4 LT |
1 | /* |
2 | * linux/arch/m32r/kernel/smpboot.c | |
3 | * orig : i386 2.4.10 | |
4 | * | |
5 | * M32R SMP booting functions | |
6 | * | |
7 | * Copyright (c) 2001, 2002, 2003 Hitoshi Yamamoto | |
8 | * | |
9 | * Taken from i386 version. | |
10 | * (c) 1995 Alan Cox, Building #3 <alan@redhat.com> | |
11 | * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com> | |
12 | * | |
13 | * Much of the core SMP work is based on previous work by Thomas Radke, to | |
14 | * whom a great many thanks are extended. | |
15 | * | |
16 | * Thanks to Intel for making available several different Pentium, | |
17 | * Pentium Pro and Pentium-II/Xeon MP machines. | |
18 | * Original development of Linux SMP code supported by Caldera. | |
19 | * | |
20 | * This code is released under the GNU General Public License version 2 or | |
21 | * later. | |
22 | * | |
23 | * Fixes | |
24 | * Felix Koop : NR_CPUS used properly | |
25 | * Jose Renau : Handle single CPU case. | |
26 | * Alan Cox : By repeated request | |
27 | * 8) - Total BogoMIP report. | |
28 | * Greg Wright : Fix for kernel stacks panic. | |
29 | * Erich Boleyn : MP v1.4 and additional changes. | |
30 | * Matthias Sattler : Changes for 2.1 kernel map. | |
31 | * Michel Lespinasse : Changes for 2.1 kernel map. | |
32 | * Michael Chastain : Change trampoline.S to gnu as. | |
33 | * Alan Cox : Dumb bug: 'B' step PPro's are fine | |
34 | * Ingo Molnar : Added APIC timers, based on code | |
35 | * from Jose Renau | |
36 | * Ingo Molnar : various cleanups and rewrites | |
37 | * Tigran Aivazian : fixed "0.00 in /proc/uptime on SMP" bug. | |
38 | * Maciej W. Rozycki : Bits for genuine 82489DX APICs | |
39 | * Martin J. Bligh : Added support for multi-quad systems | |
40 | */ | |
41 | ||
42 | #include <linux/config.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/mm.h> | |
45 | #include <linux/smp_lock.h> | |
46 | #include <linux/irq.h> | |
47 | #include <linux/bootmem.h> | |
48 | #include <linux/delay.h> | |
49 | ||
50 | #include <asm/io.h> | |
51 | #include <asm/pgalloc.h> | |
52 | #include <asm/tlbflush.h> | |
53 | ||
54 | #define DEBUG_SMP | |
55 | #ifdef DEBUG_SMP | |
56 | #define Dprintk(x...) printk(x) | |
57 | #else | |
58 | #define Dprintk(x...) | |
59 | #endif | |
60 | ||
61 | extern cpumask_t cpu_initialized; | |
62 | ||
63 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
64 | /* Data structures and variables */ | |
65 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
66 | ||
67 | /* Processor that is doing the boot up */ | |
68 | static unsigned int bsp_phys_id = -1; | |
69 | ||
70 | /* Bitmask of physically existing CPUs */ | |
71 | physid_mask_t phys_cpu_present_map; | |
72 | ||
73 | /* Bitmask of currently online CPUs */ | |
74 | cpumask_t cpu_online_map; | |
75 | ||
76 | cpumask_t cpu_bootout_map; | |
77 | cpumask_t cpu_bootin_map; | |
78 | cpumask_t cpu_callout_map; | |
79 | static cpumask_t cpu_callin_map; | |
80 | ||
81 | /* Per CPU bogomips and other parameters */ | |
82 | struct cpuinfo_m32r cpu_data[NR_CPUS] __cacheline_aligned; | |
83 | ||
84 | static int cpucount; | |
85 | static cpumask_t smp_commenced_mask; | |
86 | ||
87 | extern struct { | |
88 | void * spi; | |
89 | unsigned short ss; | |
90 | } stack_start; | |
91 | ||
92 | /* which physical physical ID maps to which logical CPU number */ | |
93 | static volatile int physid_2_cpu[NR_CPUS]; | |
e231a9c4 | 94 | #define physid_to_cpu(physid) physid_2_cpu[physid] |
1da177e4 LT |
95 | |
96 | /* which logical CPU number maps to which physical ID */ | |
97 | volatile int cpu_2_physid[NR_CPUS]; | |
98 | ||
99 | DEFINE_PER_CPU(int, prof_multiplier) = 1; | |
100 | DEFINE_PER_CPU(int, prof_old_multiplier) = 1; | |
101 | DEFINE_PER_CPU(int, prof_counter) = 1; | |
102 | ||
103 | spinlock_t ipi_lock[NR_IPIS]; | |
104 | ||
105 | static unsigned int calibration_result; | |
106 | ||
107 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
108 | /* Function Prototypes */ | |
109 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
110 | ||
111 | void smp_prepare_boot_cpu(void); | |
112 | void smp_prepare_cpus(unsigned int); | |
113 | static void smp_tune_scheduling(void); | |
114 | static void init_ipi_lock(void); | |
115 | static void do_boot_cpu(int); | |
116 | int __cpu_up(unsigned int); | |
117 | void smp_cpus_done(unsigned int); | |
118 | ||
119 | int start_secondary(void *); | |
120 | static void smp_callin(void); | |
121 | static void smp_online(void); | |
122 | ||
123 | static void show_mp_info(int); | |
124 | static void smp_store_cpu_info(int); | |
125 | static void show_cpu_info(int); | |
126 | int setup_profiling_timer(unsigned int); | |
127 | static void init_cpu_to_physid(void); | |
128 | static void map_cpu_to_physid(int, int); | |
129 | static void unmap_cpu_to_physid(int, int); | |
130 | ||
131 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
132 | /* Boot up APs Routins : BSP */ | |
133 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
134 | void __devinit smp_prepare_boot_cpu(void) | |
135 | { | |
136 | bsp_phys_id = hard_smp_processor_id(); | |
137 | physid_set(bsp_phys_id, phys_cpu_present_map); | |
138 | cpu_set(0, cpu_online_map); /* BSP's cpu_id == 0 */ | |
139 | cpu_set(0, cpu_callout_map); | |
140 | cpu_set(0, cpu_callin_map); | |
141 | ||
142 | /* | |
143 | * Initialize the logical to physical CPU number mapping | |
144 | */ | |
145 | init_cpu_to_physid(); | |
146 | map_cpu_to_physid(0, bsp_phys_id); | |
147 | current_thread_info()->cpu = 0; | |
148 | } | |
149 | ||
150 | /*==========================================================================* | |
151 | * Name: smp_prepare_cpus (old smp_boot_cpus) | |
152 | * | |
153 | * Description: This routine boot up APs. | |
154 | * | |
155 | * Born on Date: 2002.02.05 | |
156 | * | |
157 | * Arguments: NONE | |
158 | * | |
159 | * Returns: void (cannot fail) | |
160 | * | |
161 | * Modification log: | |
162 | * Date Who Description | |
163 | * ---------- --- -------------------------------------------------------- | |
164 | * 2003-06-24 hy modify for linux-2.5.69 | |
165 | * | |
166 | *==========================================================================*/ | |
167 | void __init smp_prepare_cpus(unsigned int max_cpus) | |
168 | { | |
169 | int phys_id; | |
170 | unsigned long nr_cpu; | |
171 | ||
172 | nr_cpu = inl(M32R_FPGA_NUM_OF_CPUS_PORTL); | |
173 | if (nr_cpu > NR_CPUS) { | |
174 | printk(KERN_INFO "NUM_OF_CPUS reg. value [%ld] > NR_CPU [%d]", | |
175 | nr_cpu, NR_CPUS); | |
176 | goto smp_done; | |
177 | } | |
178 | for (phys_id = 0 ; phys_id < nr_cpu ; phys_id++) | |
179 | physid_set(phys_id, phys_cpu_present_map); | |
180 | ||
181 | show_mp_info(nr_cpu); | |
182 | ||
183 | init_ipi_lock(); | |
184 | ||
185 | /* | |
186 | * Setup boot CPU information | |
187 | */ | |
188 | smp_store_cpu_info(0); /* Final full version of the data */ | |
189 | smp_tune_scheduling(); | |
190 | ||
191 | /* | |
192 | * If SMP should be disabled, then really disable it! | |
193 | */ | |
194 | if (!max_cpus) { | |
195 | printk(KERN_INFO "SMP mode deactivated by commandline.\n"); | |
196 | goto smp_done; | |
197 | } | |
198 | ||
199 | /* | |
200 | * Now scan the CPU present map and fire up the other CPUs. | |
201 | */ | |
202 | Dprintk("CPU present map : %lx\n", physids_coerce(phys_cpu_present_map)); | |
203 | ||
204 | for (phys_id = 0 ; phys_id < NR_CPUS ; phys_id++) { | |
205 | /* | |
206 | * Don't even attempt to start the boot CPU! | |
207 | */ | |
208 | if (phys_id == bsp_phys_id) | |
209 | continue; | |
210 | ||
211 | if (!physid_isset(phys_id, phys_cpu_present_map)) | |
212 | continue; | |
213 | ||
214 | if ((max_cpus >= 0) && (max_cpus <= cpucount + 1)) | |
215 | continue; | |
216 | ||
217 | do_boot_cpu(phys_id); | |
218 | ||
219 | /* | |
220 | * Make sure we unmap all failed CPUs | |
221 | */ | |
222 | if (physid_to_cpu(phys_id) == -1) { | |
223 | physid_clear(phys_id, phys_cpu_present_map); | |
224 | printk("phys CPU#%d not responding - " \ | |
225 | "cannot use it.\n", phys_id); | |
226 | } | |
227 | } | |
228 | ||
229 | smp_done: | |
230 | Dprintk("Boot done.\n"); | |
231 | } | |
232 | ||
233 | static void __init smp_tune_scheduling(void) | |
234 | { | |
235 | /* Nothing to do. */ | |
236 | } | |
237 | ||
238 | /* | |
239 | * init_ipi_lock : Initialize IPI locks. | |
240 | */ | |
241 | static void __init init_ipi_lock(void) | |
242 | { | |
243 | int ipi; | |
244 | ||
245 | for (ipi = 0 ; ipi < NR_IPIS ; ipi++) | |
246 | spin_lock_init(&ipi_lock[ipi]); | |
247 | } | |
248 | ||
249 | /*==========================================================================* | |
250 | * Name: do_boot_cpu | |
251 | * | |
252 | * Description: This routine boot up one AP. | |
253 | * | |
254 | * Born on Date: 2002.02.05 | |
255 | * | |
256 | * Arguments: phys_id - Target CPU physical ID | |
257 | * | |
258 | * Returns: void (cannot fail) | |
259 | * | |
260 | * Modification log: | |
261 | * Date Who Description | |
262 | * ---------- --- -------------------------------------------------------- | |
263 | * 2003-06-24 hy modify for linux-2.5.69 | |
264 | * | |
265 | *==========================================================================*/ | |
266 | static void __init do_boot_cpu(int phys_id) | |
267 | { | |
268 | struct task_struct *idle; | |
269 | unsigned long send_status, boot_status; | |
270 | int timeout, cpu_id; | |
271 | ||
272 | cpu_id = ++cpucount; | |
273 | ||
274 | /* | |
275 | * We can't use kernel_thread since we must avoid to | |
276 | * reschedule the child. | |
277 | */ | |
278 | idle = fork_idle(cpu_id); | |
279 | if (IS_ERR(idle)) | |
280 | panic("failed fork for CPU#%d.", cpu_id); | |
281 | ||
282 | idle->thread.lr = (unsigned long)start_secondary; | |
283 | ||
284 | map_cpu_to_physid(cpu_id, phys_id); | |
285 | ||
286 | /* So we see what's up */ | |
287 | printk("Booting processor %d/%d\n", phys_id, cpu_id); | |
288 | stack_start.spi = (void *)idle->thread.sp; | |
289 | idle->thread_info->cpu = cpu_id; | |
290 | ||
291 | /* | |
292 | * Send Startup IPI | |
293 | * 1.IPI received by CPU#(phys_id). | |
294 | * 2.CPU#(phys_id) enter startup_AP (arch/m32r/kernel/head.S) | |
295 | * 3.CPU#(phys_id) enter start_secondary() | |
296 | */ | |
297 | send_status = 0; | |
298 | boot_status = 0; | |
299 | ||
300 | cpu_set(phys_id, cpu_bootout_map); | |
301 | ||
302 | /* Send Startup IPI */ | |
303 | send_IPI_mask_phys(cpumask_of_cpu(phys_id), CPU_BOOT_IPI, 0); | |
304 | ||
305 | Dprintk("Waiting for send to finish...\n"); | |
306 | timeout = 0; | |
307 | ||
308 | /* Wait 100[ms] */ | |
309 | do { | |
310 | Dprintk("+"); | |
311 | udelay(1000); | |
312 | send_status = !cpu_isset(phys_id, cpu_bootin_map); | |
313 | } while (send_status && (timeout++ < 100)); | |
314 | ||
315 | Dprintk("After Startup.\n"); | |
316 | ||
317 | if (!send_status) { | |
318 | /* | |
319 | * allow APs to start initializing. | |
320 | */ | |
321 | Dprintk("Before Callout %d.\n", cpu_id); | |
322 | cpu_set(cpu_id, cpu_callout_map); | |
323 | Dprintk("After Callout %d.\n", cpu_id); | |
324 | ||
325 | /* | |
326 | * Wait 5s total for a response | |
327 | */ | |
328 | for (timeout = 0; timeout < 5000; timeout++) { | |
329 | if (cpu_isset(cpu_id, cpu_callin_map)) | |
330 | break; /* It has booted */ | |
331 | udelay(1000); | |
332 | } | |
333 | ||
334 | if (cpu_isset(cpu_id, cpu_callin_map)) { | |
335 | /* number CPUs logically, starting from 1 (BSP is 0) */ | |
336 | Dprintk("OK.\n"); | |
337 | } else { | |
338 | boot_status = 1; | |
339 | printk("Not responding.\n"); | |
340 | } | |
341 | } else | |
342 | printk("IPI never delivered???\n"); | |
343 | ||
344 | if (send_status || boot_status) { | |
345 | unmap_cpu_to_physid(cpu_id, phys_id); | |
346 | cpu_clear(cpu_id, cpu_callout_map); | |
347 | cpu_clear(cpu_id, cpu_callin_map); | |
348 | cpu_clear(cpu_id, cpu_initialized); | |
349 | cpucount--; | |
350 | } | |
351 | } | |
352 | ||
353 | int __devinit __cpu_up(unsigned int cpu_id) | |
354 | { | |
355 | int timeout; | |
356 | ||
357 | cpu_set(cpu_id, smp_commenced_mask); | |
358 | ||
359 | /* | |
360 | * Wait 5s total for a response | |
361 | */ | |
362 | for (timeout = 0; timeout < 5000; timeout++) { | |
363 | if (cpu_isset(cpu_id, cpu_online_map)) | |
364 | break; | |
365 | udelay(1000); | |
366 | } | |
367 | if (!cpu_isset(cpu_id, cpu_online_map)) | |
368 | BUG(); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | void __init smp_cpus_done(unsigned int max_cpus) | |
374 | { | |
375 | int cpu_id, timeout; | |
376 | unsigned long bogosum = 0; | |
377 | ||
378 | for (timeout = 0; timeout < 5000; timeout++) { | |
379 | if (cpus_equal(cpu_callin_map, cpu_online_map)) | |
380 | break; | |
381 | udelay(1000); | |
382 | } | |
383 | if (!cpus_equal(cpu_callin_map, cpu_online_map)) | |
384 | BUG(); | |
385 | ||
386 | for (cpu_id = 0 ; cpu_id < num_online_cpus() ; cpu_id++) | |
387 | show_cpu_info(cpu_id); | |
388 | ||
389 | /* | |
390 | * Allow the user to impress friends. | |
391 | */ | |
392 | Dprintk("Before bogomips.\n"); | |
393 | if (cpucount) { | |
394 | for_each_cpu_mask(cpu_id, cpu_online_map) | |
395 | bogosum += cpu_data[cpu_id].loops_per_jiffy; | |
396 | ||
397 | printk(KERN_INFO "Total of %d processors activated " \ | |
398 | "(%lu.%02lu BogoMIPS).\n", cpucount + 1, | |
399 | bogosum / (500000 / HZ), | |
400 | (bogosum / (5000 / HZ)) % 100); | |
401 | Dprintk("Before bogocount - setting activated=1.\n"); | |
402 | } | |
403 | } | |
404 | ||
405 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
406 | /* Activate a secondary processor Routins */ | |
407 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
408 | ||
409 | /*==========================================================================* | |
410 | * Name: start_secondary | |
411 | * | |
412 | * Description: This routine activate a secondary processor. | |
413 | * | |
414 | * Born on Date: 2002.02.05 | |
415 | * | |
416 | * Arguments: *unused - currently unused. | |
417 | * | |
418 | * Returns: void (cannot fail) | |
419 | * | |
420 | * Modification log: | |
421 | * Date Who Description | |
422 | * ---------- --- -------------------------------------------------------- | |
423 | * 2003-06-24 hy modify for linux-2.5.69 | |
424 | * | |
425 | *==========================================================================*/ | |
426 | int __init start_secondary(void *unused) | |
427 | { | |
428 | cpu_init(); | |
429 | smp_callin(); | |
430 | while (!cpu_isset(smp_processor_id(), smp_commenced_mask)) | |
431 | cpu_relax(); | |
432 | ||
433 | smp_online(); | |
434 | ||
435 | /* | |
436 | * low-memory mappings have been cleared, flush them from | |
437 | * the local TLBs too. | |
438 | */ | |
439 | local_flush_tlb_all(); | |
440 | ||
441 | cpu_idle(); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | /*==========================================================================* | |
446 | * Name: smp_callin | |
447 | * | |
448 | * Description: This routine activate a secondary processor. | |
449 | * | |
450 | * Born on Date: 2002.02.05 | |
451 | * | |
452 | * Arguments: NONE | |
453 | * | |
454 | * Returns: void (cannot fail) | |
455 | * | |
456 | * Modification log: | |
457 | * Date Who Description | |
458 | * ---------- --- -------------------------------------------------------- | |
459 | * 2003-06-24 hy modify for linux-2.5.69 | |
460 | * | |
461 | *==========================================================================*/ | |
462 | static void __init smp_callin(void) | |
463 | { | |
464 | int phys_id = hard_smp_processor_id(); | |
465 | int cpu_id = smp_processor_id(); | |
466 | unsigned long timeout; | |
467 | ||
468 | if (cpu_isset(cpu_id, cpu_callin_map)) { | |
469 | printk("huh, phys CPU#%d, CPU#%d already present??\n", | |
470 | phys_id, cpu_id); | |
471 | BUG(); | |
472 | } | |
473 | Dprintk("CPU#%d (phys ID: %d) waiting for CALLOUT\n", cpu_id, phys_id); | |
474 | ||
475 | /* Waiting 2s total for startup (udelay is not yet working) */ | |
476 | timeout = jiffies + (2 * HZ); | |
477 | while (time_before(jiffies, timeout)) { | |
478 | /* Has the boot CPU finished it's STARTUP sequence ? */ | |
479 | if (cpu_isset(cpu_id, cpu_callout_map)) | |
480 | break; | |
481 | cpu_relax(); | |
482 | } | |
483 | ||
484 | if (!time_before(jiffies, timeout)) { | |
485 | printk("BUG: CPU#%d started up but did not get a callout!\n", | |
486 | cpu_id); | |
487 | BUG(); | |
488 | } | |
489 | ||
490 | /* Allow the master to continue. */ | |
491 | cpu_set(cpu_id, cpu_callin_map); | |
492 | } | |
493 | ||
494 | static void __init smp_online(void) | |
495 | { | |
496 | int cpu_id = smp_processor_id(); | |
497 | ||
498 | local_irq_enable(); | |
499 | ||
500 | /* Get our bogomips. */ | |
501 | calibrate_delay(); | |
502 | ||
503 | /* Save our processor parameters */ | |
504 | smp_store_cpu_info(cpu_id); | |
505 | ||
506 | cpu_set(cpu_id, cpu_online_map); | |
507 | } | |
508 | ||
509 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
510 | /* Boot up CPUs common Routins */ | |
511 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
512 | static void __init show_mp_info(int nr_cpu) | |
513 | { | |
514 | int i; | |
515 | char cpu_model0[17], cpu_model1[17], cpu_ver[9]; | |
516 | ||
517 | strncpy(cpu_model0, (char *)M32R_FPGA_CPU_NAME_ADDR, 16); | |
518 | strncpy(cpu_model1, (char *)M32R_FPGA_MODEL_ID_ADDR, 16); | |
519 | strncpy(cpu_ver, (char *)M32R_FPGA_VERSION_ADDR, 8); | |
520 | ||
521 | cpu_model0[16] = '\0'; | |
522 | for (i = 15 ; i >= 0 ; i--) { | |
523 | if (cpu_model0[i] != ' ') | |
524 | break; | |
525 | cpu_model0[i] = '\0'; | |
526 | } | |
527 | cpu_model1[16] = '\0'; | |
528 | for (i = 15 ; i >= 0 ; i--) { | |
529 | if (cpu_model1[i] != ' ') | |
530 | break; | |
531 | cpu_model1[i] = '\0'; | |
532 | } | |
533 | cpu_ver[8] = '\0'; | |
534 | for (i = 7 ; i >= 0 ; i--) { | |
535 | if (cpu_ver[i] != ' ') | |
536 | break; | |
537 | cpu_ver[i] = '\0'; | |
538 | } | |
539 | ||
540 | printk(KERN_INFO "M32R-mp information\n"); | |
541 | printk(KERN_INFO " On-chip CPUs : %d\n", nr_cpu); | |
542 | printk(KERN_INFO " CPU model : %s/%s(%s)\n", cpu_model0, | |
543 | cpu_model1, cpu_ver); | |
544 | } | |
545 | ||
546 | /* | |
547 | * The bootstrap kernel entry code has set these up. Save them for | |
548 | * a given CPU | |
549 | */ | |
550 | static void __init smp_store_cpu_info(int cpu_id) | |
551 | { | |
552 | struct cpuinfo_m32r *ci = cpu_data + cpu_id; | |
553 | ||
554 | *ci = boot_cpu_data; | |
555 | ci->loops_per_jiffy = loops_per_jiffy; | |
556 | } | |
557 | ||
558 | static void __init show_cpu_info(int cpu_id) | |
559 | { | |
560 | struct cpuinfo_m32r *ci = &cpu_data[cpu_id]; | |
561 | ||
562 | printk("CPU#%d : ", cpu_id); | |
563 | ||
564 | #define PRINT_CLOCK(name, value) \ | |
565 | printk(name " clock %d.%02dMHz", \ | |
566 | ((value) / 1000000), ((value) % 1000000) / 10000) | |
567 | ||
568 | PRINT_CLOCK("CPU", (int)ci->cpu_clock); | |
569 | PRINT_CLOCK(", Bus", (int)ci->bus_clock); | |
570 | printk(", loops_per_jiffy[%ld]\n", ci->loops_per_jiffy); | |
571 | } | |
572 | ||
573 | /* | |
574 | * the frequency of the profiling timer can be changed | |
575 | * by writing a multiplier value into /proc/profile. | |
576 | */ | |
577 | int setup_profiling_timer(unsigned int multiplier) | |
578 | { | |
579 | int i; | |
580 | ||
581 | /* | |
582 | * Sanity check. [at least 500 APIC cycles should be | |
583 | * between APIC interrupts as a rule of thumb, to avoid | |
584 | * irqs flooding us] | |
585 | */ | |
586 | if ( (!multiplier) || (calibration_result / multiplier < 500)) | |
587 | return -EINVAL; | |
588 | ||
589 | /* | |
590 | * Set the new multiplier for each CPU. CPUs don't start using the | |
591 | * new values until the next timer interrupt in which they do process | |
592 | * accounting. At that time they also adjust their APIC timers | |
593 | * accordingly. | |
594 | */ | |
595 | for (i = 0; i < NR_CPUS; ++i) | |
596 | per_cpu(prof_multiplier, i) = multiplier; | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
601 | /* Initialize all maps between cpu number and apicids */ | |
602 | static void __init init_cpu_to_physid(void) | |
603 | { | |
604 | int i; | |
605 | ||
606 | for (i = 0 ; i < NR_CPUS ; i++) { | |
607 | cpu_2_physid[i] = -1; | |
608 | physid_2_cpu[i] = -1; | |
609 | } | |
610 | } | |
611 | ||
612 | /* | |
613 | * set up a mapping between cpu and apicid. Uses logical apicids for multiquad, | |
614 | * else physical apic ids | |
615 | */ | |
616 | static void __init map_cpu_to_physid(int cpu_id, int phys_id) | |
617 | { | |
618 | physid_2_cpu[phys_id] = cpu_id; | |
619 | cpu_2_physid[cpu_id] = phys_id; | |
620 | } | |
621 | ||
622 | /* | |
623 | * undo a mapping between cpu and apicid. Uses logical apicids for multiquad, | |
624 | * else physical apic ids | |
625 | */ | |
626 | static void __init unmap_cpu_to_physid(int cpu_id, int phys_id) | |
627 | { | |
628 | physid_2_cpu[phys_id] = -1; | |
629 | cpu_2_physid[cpu_id] = -1; | |
630 | } | |
631 |