Commit | Line | Data |
---|---|---|
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 | ||
7c1c4e54 | 42 | #include <linux/module.h> |
3baf63a5 | 43 | #include <linux/cpu.h> |
1da177e4 | 44 | #include <linux/init.h> |
7c1c4e54 | 45 | #include <linux/kernel.h> |
1da177e4 | 46 | #include <linux/mm.h> |
df0f65f0 | 47 | #include <linux/sched.h> |
cfcd8c4f | 48 | #include <linux/err.h> |
1da177e4 LT |
49 | #include <linux/irq.h> |
50 | #include <linux/bootmem.h> | |
51 | #include <linux/delay.h> | |
52 | ||
53 | #include <asm/io.h> | |
54 | #include <asm/pgalloc.h> | |
55 | #include <asm/tlbflush.h> | |
56 | ||
57 | #define DEBUG_SMP | |
58 | #ifdef DEBUG_SMP | |
59 | #define Dprintk(x...) printk(x) | |
60 | #else | |
61 | #define Dprintk(x...) | |
62 | #endif | |
63 | ||
64 | extern cpumask_t cpu_initialized; | |
65 | ||
66 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
67 | /* Data structures and variables */ | |
68 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
69 | ||
70 | /* Processor that is doing the boot up */ | |
71 | static unsigned int bsp_phys_id = -1; | |
72 | ||
73 | /* Bitmask of physically existing CPUs */ | |
74 | physid_mask_t phys_cpu_present_map; | |
75 | ||
1da177e4 LT |
76 | cpumask_t cpu_bootout_map; |
77 | cpumask_t cpu_bootin_map; | |
1da177e4 | 78 | static cpumask_t cpu_callin_map; |
7c1c4e54 HT |
79 | cpumask_t cpu_callout_map; |
80 | EXPORT_SYMBOL(cpu_callout_map); | |
1da177e4 LT |
81 | |
82 | /* Per CPU bogomips and other parameters */ | |
83 | struct cpuinfo_m32r cpu_data[NR_CPUS] __cacheline_aligned; | |
84 | ||
85 | static int cpucount; | |
86 | static cpumask_t smp_commenced_mask; | |
87 | ||
88 | extern struct { | |
89 | void * spi; | |
90 | unsigned short ss; | |
91 | } stack_start; | |
92 | ||
93 | /* which physical physical ID maps to which logical CPU number */ | |
94 | static volatile int physid_2_cpu[NR_CPUS]; | |
e231a9c4 | 95 | #define physid_to_cpu(physid) physid_2_cpu[physid] |
1da177e4 LT |
96 | |
97 | /* which logical CPU number maps to which physical ID */ | |
98 | volatile int cpu_2_physid[NR_CPUS]; | |
99 | ||
100 | DEFINE_PER_CPU(int, prof_multiplier) = 1; | |
101 | DEFINE_PER_CPU(int, prof_old_multiplier) = 1; | |
102 | DEFINE_PER_CPU(int, prof_counter) = 1; | |
103 | ||
104 | spinlock_t ipi_lock[NR_IPIS]; | |
105 | ||
106 | static unsigned int calibration_result; | |
107 | ||
108 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
109 | /* Function Prototypes */ | |
110 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
111 | ||
1da177e4 LT |
112 | static void init_ipi_lock(void); |
113 | static void do_boot_cpu(int); | |
1da177e4 LT |
114 | |
115 | int start_secondary(void *); | |
116 | static void smp_callin(void); | |
117 | static void smp_online(void); | |
118 | ||
119 | static void show_mp_info(int); | |
120 | static void smp_store_cpu_info(int); | |
121 | static void show_cpu_info(int); | |
122 | int setup_profiling_timer(unsigned int); | |
123 | static void init_cpu_to_physid(void); | |
124 | static void map_cpu_to_physid(int, int); | |
125 | static void unmap_cpu_to_physid(int, int); | |
126 | ||
127 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
5aa8b6c1 | 128 | /* Boot up APs Routines : BSP */ |
1da177e4 | 129 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ |
b881bc46 | 130 | void smp_prepare_boot_cpu(void) |
1da177e4 LT |
131 | { |
132 | bsp_phys_id = hard_smp_processor_id(); | |
133 | physid_set(bsp_phys_id, phys_cpu_present_map); | |
937e26c0 KM |
134 | set_cpu_online(0, true); /* BSP's cpu_id == 0 */ |
135 | cpumask_set_cpu(0, &cpu_callout_map); | |
136 | cpumask_set_cpu(0, &cpu_callin_map); | |
1da177e4 LT |
137 | |
138 | /* | |
139 | * Initialize the logical to physical CPU number mapping | |
140 | */ | |
141 | init_cpu_to_physid(); | |
142 | map_cpu_to_physid(0, bsp_phys_id); | |
143 | current_thread_info()->cpu = 0; | |
144 | } | |
145 | ||
146 | /*==========================================================================* | |
147 | * Name: smp_prepare_cpus (old smp_boot_cpus) | |
148 | * | |
149 | * Description: This routine boot up APs. | |
150 | * | |
151 | * Born on Date: 2002.02.05 | |
152 | * | |
153 | * Arguments: NONE | |
154 | * | |
155 | * Returns: void (cannot fail) | |
156 | * | |
157 | * Modification log: | |
158 | * Date Who Description | |
159 | * ---------- --- -------------------------------------------------------- | |
160 | * 2003-06-24 hy modify for linux-2.5.69 | |
161 | * | |
162 | *==========================================================================*/ | |
163 | void __init smp_prepare_cpus(unsigned int max_cpus) | |
164 | { | |
165 | int phys_id; | |
166 | unsigned long nr_cpu; | |
167 | ||
168 | nr_cpu = inl(M32R_FPGA_NUM_OF_CPUS_PORTL); | |
169 | if (nr_cpu > NR_CPUS) { | |
170 | printk(KERN_INFO "NUM_OF_CPUS reg. value [%ld] > NR_CPU [%d]", | |
171 | nr_cpu, NR_CPUS); | |
172 | goto smp_done; | |
173 | } | |
174 | for (phys_id = 0 ; phys_id < nr_cpu ; phys_id++) | |
175 | physid_set(phys_id, phys_cpu_present_map); | |
7c1c4e54 | 176 | #ifndef CONFIG_HOTPLUG_CPU |
937e26c0 | 177 | init_cpu_present(cpu_possible_mask); |
7c1c4e54 | 178 | #endif |
1da177e4 LT |
179 | |
180 | show_mp_info(nr_cpu); | |
181 | ||
182 | init_ipi_lock(); | |
183 | ||
184 | /* | |
185 | * Setup boot CPU information | |
186 | */ | |
187 | smp_store_cpu_info(0); /* Final full version of the data */ | |
1da177e4 LT |
188 | |
189 | /* | |
190 | * If SMP should be disabled, then really disable it! | |
191 | */ | |
192 | if (!max_cpus) { | |
193 | printk(KERN_INFO "SMP mode deactivated by commandline.\n"); | |
194 | goto smp_done; | |
195 | } | |
196 | ||
197 | /* | |
198 | * Now scan the CPU present map and fire up the other CPUs. | |
199 | */ | |
200 | Dprintk("CPU present map : %lx\n", physids_coerce(phys_cpu_present_map)); | |
201 | ||
202 | for (phys_id = 0 ; phys_id < NR_CPUS ; phys_id++) { | |
203 | /* | |
204 | * Don't even attempt to start the boot CPU! | |
205 | */ | |
206 | if (phys_id == bsp_phys_id) | |
207 | continue; | |
208 | ||
209 | if (!physid_isset(phys_id, phys_cpu_present_map)) | |
210 | continue; | |
211 | ||
d5a6d173 | 212 | if (max_cpus <= cpucount + 1) |
1da177e4 LT |
213 | continue; |
214 | ||
215 | do_boot_cpu(phys_id); | |
216 | ||
217 | /* | |
218 | * Make sure we unmap all failed CPUs | |
219 | */ | |
220 | if (physid_to_cpu(phys_id) == -1) { | |
221 | physid_clear(phys_id, phys_cpu_present_map); | |
222 | printk("phys CPU#%d not responding - " \ | |
223 | "cannot use it.\n", phys_id); | |
224 | } | |
225 | } | |
226 | ||
227 | smp_done: | |
228 | Dprintk("Boot done.\n"); | |
229 | } | |
230 | ||
1da177e4 LT |
231 | /* |
232 | * init_ipi_lock : Initialize IPI locks. | |
233 | */ | |
234 | static void __init init_ipi_lock(void) | |
235 | { | |
236 | int ipi; | |
237 | ||
238 | for (ipi = 0 ; ipi < NR_IPIS ; ipi++) | |
239 | spin_lock_init(&ipi_lock[ipi]); | |
240 | } | |
241 | ||
242 | /*==========================================================================* | |
243 | * Name: do_boot_cpu | |
244 | * | |
245 | * Description: This routine boot up one AP. | |
246 | * | |
247 | * Born on Date: 2002.02.05 | |
248 | * | |
249 | * Arguments: phys_id - Target CPU physical ID | |
250 | * | |
251 | * Returns: void (cannot fail) | |
252 | * | |
253 | * Modification log: | |
254 | * Date Who Description | |
255 | * ---------- --- -------------------------------------------------------- | |
256 | * 2003-06-24 hy modify for linux-2.5.69 | |
257 | * | |
258 | *==========================================================================*/ | |
259 | static void __init do_boot_cpu(int phys_id) | |
260 | { | |
261 | struct task_struct *idle; | |
262 | unsigned long send_status, boot_status; | |
263 | int timeout, cpu_id; | |
264 | ||
265 | cpu_id = ++cpucount; | |
266 | ||
267 | /* | |
268 | * We can't use kernel_thread since we must avoid to | |
269 | * reschedule the child. | |
270 | */ | |
271 | idle = fork_idle(cpu_id); | |
272 | if (IS_ERR(idle)) | |
273 | panic("failed fork for CPU#%d.", cpu_id); | |
274 | ||
275 | idle->thread.lr = (unsigned long)start_secondary; | |
276 | ||
277 | map_cpu_to_physid(cpu_id, phys_id); | |
278 | ||
279 | /* So we see what's up */ | |
280 | printk("Booting processor %d/%d\n", phys_id, cpu_id); | |
281 | stack_start.spi = (void *)idle->thread.sp; | |
6c3559fc | 282 | task_thread_info(idle)->cpu = cpu_id; |
1da177e4 LT |
283 | |
284 | /* | |
285 | * Send Startup IPI | |
286 | * 1.IPI received by CPU#(phys_id). | |
287 | * 2.CPU#(phys_id) enter startup_AP (arch/m32r/kernel/head.S) | |
288 | * 3.CPU#(phys_id) enter start_secondary() | |
289 | */ | |
290 | send_status = 0; | |
291 | boot_status = 0; | |
292 | ||
937e26c0 | 293 | cpumask_set_cpu(phys_id, &cpu_bootout_map); |
1da177e4 LT |
294 | |
295 | /* Send Startup IPI */ | |
937e26c0 | 296 | send_IPI_mask_phys(cpumask_of(phys_id), CPU_BOOT_IPI, 0); |
1da177e4 LT |
297 | |
298 | Dprintk("Waiting for send to finish...\n"); | |
299 | timeout = 0; | |
300 | ||
301 | /* Wait 100[ms] */ | |
302 | do { | |
303 | Dprintk("+"); | |
304 | udelay(1000); | |
937e26c0 | 305 | send_status = !cpumask_test_cpu(phys_id, &cpu_bootin_map); |
1da177e4 LT |
306 | } while (send_status && (timeout++ < 100)); |
307 | ||
308 | Dprintk("After Startup.\n"); | |
309 | ||
310 | if (!send_status) { | |
311 | /* | |
312 | * allow APs to start initializing. | |
313 | */ | |
314 | Dprintk("Before Callout %d.\n", cpu_id); | |
937e26c0 | 315 | cpumask_set_cpu(cpu_id, &cpu_callout_map); |
1da177e4 LT |
316 | Dprintk("After Callout %d.\n", cpu_id); |
317 | ||
318 | /* | |
319 | * Wait 5s total for a response | |
320 | */ | |
321 | for (timeout = 0; timeout < 5000; timeout++) { | |
937e26c0 | 322 | if (cpumask_test_cpu(cpu_id, &cpu_callin_map)) |
1da177e4 LT |
323 | break; /* It has booted */ |
324 | udelay(1000); | |
325 | } | |
326 | ||
937e26c0 | 327 | if (cpumask_test_cpu(cpu_id, &cpu_callin_map)) { |
1da177e4 LT |
328 | /* number CPUs logically, starting from 1 (BSP is 0) */ |
329 | Dprintk("OK.\n"); | |
330 | } else { | |
331 | boot_status = 1; | |
332 | printk("Not responding.\n"); | |
333 | } | |
334 | } else | |
335 | printk("IPI never delivered???\n"); | |
336 | ||
337 | if (send_status || boot_status) { | |
338 | unmap_cpu_to_physid(cpu_id, phys_id); | |
937e26c0 KM |
339 | cpumask_clear_cpu(cpu_id, &cpu_callout_map); |
340 | cpumask_clear_cpu(cpu_id, &cpu_callin_map); | |
341 | cpumask_clear_cpu(cpu_id, &cpu_initialized); | |
1da177e4 LT |
342 | cpucount--; |
343 | } | |
344 | } | |
345 | ||
d1407fde | 346 | int __cpu_up(unsigned int cpu_id, struct task_struct *tidle) |
1da177e4 LT |
347 | { |
348 | int timeout; | |
349 | ||
937e26c0 | 350 | cpumask_set_cpu(cpu_id, &smp_commenced_mask); |
1da177e4 LT |
351 | |
352 | /* | |
353 | * Wait 5s total for a response | |
354 | */ | |
355 | for (timeout = 0; timeout < 5000; timeout++) { | |
937e26c0 | 356 | if (cpu_online(cpu_id)) |
1da177e4 LT |
357 | break; |
358 | udelay(1000); | |
359 | } | |
937e26c0 | 360 | if (!cpu_online(cpu_id)) |
1da177e4 LT |
361 | BUG(); |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | void __init smp_cpus_done(unsigned int max_cpus) | |
367 | { | |
368 | int cpu_id, timeout; | |
369 | unsigned long bogosum = 0; | |
370 | ||
371 | for (timeout = 0; timeout < 5000; timeout++) { | |
937e26c0 | 372 | if (cpumask_equal(&cpu_callin_map, cpu_online_mask)) |
1da177e4 LT |
373 | break; |
374 | udelay(1000); | |
375 | } | |
937e26c0 | 376 | if (!cpumask_equal(&cpu_callin_map, cpu_online_mask)) |
1da177e4 LT |
377 | BUG(); |
378 | ||
379 | for (cpu_id = 0 ; cpu_id < num_online_cpus() ; cpu_id++) | |
380 | show_cpu_info(cpu_id); | |
381 | ||
382 | /* | |
383 | * Allow the user to impress friends. | |
384 | */ | |
385 | Dprintk("Before bogomips.\n"); | |
386 | if (cpucount) { | |
937e26c0 | 387 | for_each_cpu(cpu_id,cpu_online_mask) |
1da177e4 LT |
388 | bogosum += cpu_data[cpu_id].loops_per_jiffy; |
389 | ||
390 | printk(KERN_INFO "Total of %d processors activated " \ | |
391 | "(%lu.%02lu BogoMIPS).\n", cpucount + 1, | |
392 | bogosum / (500000 / HZ), | |
393 | (bogosum / (5000 / HZ)) % 100); | |
394 | Dprintk("Before bogocount - setting activated=1.\n"); | |
395 | } | |
396 | } | |
397 | ||
398 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
5aa8b6c1 | 399 | /* Activate a secondary processor Routines */ |
1da177e4 LT |
400 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ |
401 | ||
402 | /*==========================================================================* | |
403 | * Name: start_secondary | |
404 | * | |
405 | * Description: This routine activate a secondary processor. | |
406 | * | |
407 | * Born on Date: 2002.02.05 | |
408 | * | |
409 | * Arguments: *unused - currently unused. | |
410 | * | |
411 | * Returns: void (cannot fail) | |
412 | * | |
413 | * Modification log: | |
414 | * Date Who Description | |
415 | * ---------- --- -------------------------------------------------------- | |
416 | * 2003-06-24 hy modify for linux-2.5.69 | |
417 | * | |
418 | *==========================================================================*/ | |
419 | int __init start_secondary(void *unused) | |
420 | { | |
421 | cpu_init(); | |
5bfb5d69 | 422 | preempt_disable(); |
1da177e4 | 423 | smp_callin(); |
937e26c0 | 424 | while (!cpumask_test_cpu(smp_processor_id(), &smp_commenced_mask)) |
1da177e4 LT |
425 | cpu_relax(); |
426 | ||
427 | smp_online(); | |
428 | ||
429 | /* | |
430 | * low-memory mappings have been cleared, flush them from | |
431 | * the local TLBs too. | |
432 | */ | |
433 | local_flush_tlb_all(); | |
434 | ||
01436228 | 435 | cpu_startup_entry(CPUHP_ONLINE); |
1da177e4 LT |
436 | return 0; |
437 | } | |
438 | ||
439 | /*==========================================================================* | |
440 | * Name: smp_callin | |
441 | * | |
442 | * Description: This routine activate a secondary processor. | |
443 | * | |
444 | * Born on Date: 2002.02.05 | |
445 | * | |
446 | * Arguments: NONE | |
447 | * | |
448 | * Returns: void (cannot fail) | |
449 | * | |
450 | * Modification log: | |
451 | * Date Who Description | |
452 | * ---------- --- -------------------------------------------------------- | |
453 | * 2003-06-24 hy modify for linux-2.5.69 | |
454 | * | |
455 | *==========================================================================*/ | |
456 | static void __init smp_callin(void) | |
457 | { | |
458 | int phys_id = hard_smp_processor_id(); | |
459 | int cpu_id = smp_processor_id(); | |
460 | unsigned long timeout; | |
461 | ||
937e26c0 | 462 | if (cpumask_test_cpu(cpu_id, &cpu_callin_map)) { |
1da177e4 LT |
463 | printk("huh, phys CPU#%d, CPU#%d already present??\n", |
464 | phys_id, cpu_id); | |
465 | BUG(); | |
466 | } | |
467 | Dprintk("CPU#%d (phys ID: %d) waiting for CALLOUT\n", cpu_id, phys_id); | |
468 | ||
469 | /* Waiting 2s total for startup (udelay is not yet working) */ | |
470 | timeout = jiffies + (2 * HZ); | |
471 | while (time_before(jiffies, timeout)) { | |
472 | /* Has the boot CPU finished it's STARTUP sequence ? */ | |
937e26c0 | 473 | if (cpumask_test_cpu(cpu_id, &cpu_callout_map)) |
1da177e4 LT |
474 | break; |
475 | cpu_relax(); | |
476 | } | |
477 | ||
478 | if (!time_before(jiffies, timeout)) { | |
479 | printk("BUG: CPU#%d started up but did not get a callout!\n", | |
480 | cpu_id); | |
481 | BUG(); | |
482 | } | |
483 | ||
484 | /* Allow the master to continue. */ | |
937e26c0 | 485 | cpumask_set_cpu(cpu_id, &cpu_callin_map); |
1da177e4 LT |
486 | } |
487 | ||
488 | static void __init smp_online(void) | |
489 | { | |
490 | int cpu_id = smp_processor_id(); | |
491 | ||
e545a614 MS |
492 | notify_cpu_starting(cpu_id); |
493 | ||
1da177e4 LT |
494 | local_irq_enable(); |
495 | ||
496 | /* Get our bogomips. */ | |
497 | calibrate_delay(); | |
498 | ||
499 | /* Save our processor parameters */ | |
500 | smp_store_cpu_info(cpu_id); | |
501 | ||
937e26c0 | 502 | set_cpu_online(cpu_id, true); |
1da177e4 LT |
503 | } |
504 | ||
505 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ | |
5aa8b6c1 | 506 | /* Boot up CPUs common Routines */ |
1da177e4 LT |
507 | /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ |
508 | static void __init show_mp_info(int nr_cpu) | |
509 | { | |
510 | int i; | |
511 | char cpu_model0[17], cpu_model1[17], cpu_ver[9]; | |
512 | ||
513 | strncpy(cpu_model0, (char *)M32R_FPGA_CPU_NAME_ADDR, 16); | |
514 | strncpy(cpu_model1, (char *)M32R_FPGA_MODEL_ID_ADDR, 16); | |
515 | strncpy(cpu_ver, (char *)M32R_FPGA_VERSION_ADDR, 8); | |
516 | ||
517 | cpu_model0[16] = '\0'; | |
518 | for (i = 15 ; i >= 0 ; i--) { | |
519 | if (cpu_model0[i] != ' ') | |
520 | break; | |
521 | cpu_model0[i] = '\0'; | |
522 | } | |
523 | cpu_model1[16] = '\0'; | |
524 | for (i = 15 ; i >= 0 ; i--) { | |
525 | if (cpu_model1[i] != ' ') | |
526 | break; | |
527 | cpu_model1[i] = '\0'; | |
528 | } | |
529 | cpu_ver[8] = '\0'; | |
530 | for (i = 7 ; i >= 0 ; i--) { | |
531 | if (cpu_ver[i] != ' ') | |
532 | break; | |
533 | cpu_ver[i] = '\0'; | |
534 | } | |
535 | ||
536 | printk(KERN_INFO "M32R-mp information\n"); | |
537 | printk(KERN_INFO " On-chip CPUs : %d\n", nr_cpu); | |
538 | printk(KERN_INFO " CPU model : %s/%s(%s)\n", cpu_model0, | |
539 | cpu_model1, cpu_ver); | |
540 | } | |
541 | ||
542 | /* | |
543 | * The bootstrap kernel entry code has set these up. Save them for | |
544 | * a given CPU | |
545 | */ | |
546 | static void __init smp_store_cpu_info(int cpu_id) | |
547 | { | |
548 | struct cpuinfo_m32r *ci = cpu_data + cpu_id; | |
549 | ||
550 | *ci = boot_cpu_data; | |
551 | ci->loops_per_jiffy = loops_per_jiffy; | |
552 | } | |
553 | ||
554 | static void __init show_cpu_info(int cpu_id) | |
555 | { | |
556 | struct cpuinfo_m32r *ci = &cpu_data[cpu_id]; | |
557 | ||
558 | printk("CPU#%d : ", cpu_id); | |
559 | ||
560 | #define PRINT_CLOCK(name, value) \ | |
561 | printk(name " clock %d.%02dMHz", \ | |
562 | ((value) / 1000000), ((value) % 1000000) / 10000) | |
563 | ||
564 | PRINT_CLOCK("CPU", (int)ci->cpu_clock); | |
565 | PRINT_CLOCK(", Bus", (int)ci->bus_clock); | |
566 | printk(", loops_per_jiffy[%ld]\n", ci->loops_per_jiffy); | |
567 | } | |
568 | ||
569 | /* | |
570 | * the frequency of the profiling timer can be changed | |
571 | * by writing a multiplier value into /proc/profile. | |
572 | */ | |
573 | int setup_profiling_timer(unsigned int multiplier) | |
574 | { | |
575 | int i; | |
576 | ||
577 | /* | |
578 | * Sanity check. [at least 500 APIC cycles should be | |
579 | * between APIC interrupts as a rule of thumb, to avoid | |
580 | * irqs flooding us] | |
581 | */ | |
582 | if ( (!multiplier) || (calibration_result / multiplier < 500)) | |
583 | return -EINVAL; | |
584 | ||
585 | /* | |
586 | * Set the new multiplier for each CPU. CPUs don't start using the | |
587 | * new values until the next timer interrupt in which they do process | |
588 | * accounting. At that time they also adjust their APIC timers | |
589 | * accordingly. | |
590 | */ | |
9e2f913d | 591 | for_each_possible_cpu(i) |
1da177e4 LT |
592 | per_cpu(prof_multiplier, i) = multiplier; |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | /* Initialize all maps between cpu number and apicids */ | |
598 | static void __init init_cpu_to_physid(void) | |
599 | { | |
600 | int i; | |
601 | ||
602 | for (i = 0 ; i < NR_CPUS ; i++) { | |
603 | cpu_2_physid[i] = -1; | |
604 | physid_2_cpu[i] = -1; | |
605 | } | |
606 | } | |
607 | ||
608 | /* | |
609 | * set up a mapping between cpu and apicid. Uses logical apicids for multiquad, | |
610 | * else physical apic ids | |
611 | */ | |
612 | static void __init map_cpu_to_physid(int cpu_id, int phys_id) | |
613 | { | |
614 | physid_2_cpu[phys_id] = cpu_id; | |
615 | cpu_2_physid[cpu_id] = phys_id; | |
616 | } | |
617 | ||
618 | /* | |
619 | * undo a mapping between cpu and apicid. Uses logical apicids for multiquad, | |
620 | * else physical apic ids | |
621 | */ | |
622 | static void __init unmap_cpu_to_physid(int cpu_id, int phys_id) | |
623 | { | |
624 | physid_2_cpu[phys_id] = -1; | |
625 | cpu_2_physid[cpu_id] = -1; | |
626 | } |