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1/* smp.c: Sparc SMP support.
2 *
3 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
4 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 * Copyright (C) 2004 Keith M Wesolowski (wesolows@foobazco.org)
6 */
7
8#include <asm/head.h>
9
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/threads.h>
13#include <linux/smp.h>
14#include <linux/interrupt.h>
15#include <linux/kernel_stat.h>
16#include <linux/init.h>
17#include <linux/spinlock.h>
18#include <linux/mm.h>
19#include <linux/fs.h>
20#include <linux/seq_file.h>
21#include <linux/cache.h>
22#include <linux/delay.h>
23#include <linux/profile.h>
24#include <linux/cpu.h>
25
26#include <asm/ptrace.h>
27#include <linux/atomic.h>
28
29#include <asm/irq.h>
30#include <asm/page.h>
31#include <asm/pgalloc.h>
32#include <asm/pgtable.h>
33#include <asm/oplib.h>
34#include <asm/cacheflush.h>
35#include <asm/tlbflush.h>
36#include <asm/cpudata.h>
37#include <asm/timer.h>
38#include <asm/leon.h>
39
40#include "kernel.h"
41#include "irq.h"
42
43volatile unsigned long cpu_callin_map[NR_CPUS] = {0,};
44
45cpumask_t smp_commenced_mask = CPU_MASK_NONE;
46
47const struct sparc32_ipi_ops *sparc32_ipi_ops;
48
49/* The only guaranteed locking primitive available on all Sparc
50 * processors is 'ldstub [%reg + immediate], %dest_reg' which atomically
51 * places the current byte at the effective address into dest_reg and
52 * places 0xff there afterwards. Pretty lame locking primitive
53 * compared to the Alpha and the Intel no? Most Sparcs have 'swap'
54 * instruction which is much better...
55 */
56
57void smp_store_cpu_info(int id)
58{
59 int cpu_node;
60 int mid;
61
62 cpu_data(id).udelay_val = loops_per_jiffy;
63
64 cpu_find_by_mid(id, &cpu_node);
65 cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
66 "clock-frequency", 0);
67 cpu_data(id).prom_node = cpu_node;
68 mid = cpu_get_hwmid(cpu_node);
69
70 if (mid < 0) {
71 printk(KERN_NOTICE "No MID found for CPU%d at node 0x%08x", id, cpu_node);
72 mid = 0;
73 }
74 cpu_data(id).mid = mid;
75}
76
77void __init smp_cpus_done(unsigned int max_cpus)
78{
79 unsigned long bogosum = 0;
80 int cpu, num = 0;
81
82 for_each_online_cpu(cpu) {
83 num++;
84 bogosum += cpu_data(cpu).udelay_val;
85 }
86
87 printk("Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
88 num, bogosum/(500000/HZ),
89 (bogosum/(5000/HZ))%100);
90
91 switch(sparc_cpu_model) {
92 case sun4m:
93 smp4m_smp_done();
94 break;
95 case sun4d:
96 smp4d_smp_done();
97 break;
98 case sparc_leon:
99 leon_smp_done();
100 break;
101 case sun4e:
102 printk("SUN4E\n");
103 BUG();
104 break;
105 case sun4u:
106 printk("SUN4U\n");
107 BUG();
108 break;
109 default:
110 printk("UNKNOWN!\n");
111 BUG();
112 break;
113 }
114}
115
116void cpu_panic(void)
117{
118 printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id());
119 panic("SMP bolixed\n");
120}
121
122struct linux_prom_registers smp_penguin_ctable = { 0 };
123
124void smp_send_reschedule(int cpu)
125{
126 /*
127 * CPU model dependent way of implementing IPI generation targeting
128 * a single CPU. The trap handler needs only to do trap entry/return
129 * to call schedule.
130 */
131 sparc32_ipi_ops->resched(cpu);
132}
133
134void smp_send_stop(void)
135{
136}
137
138void arch_send_call_function_single_ipi(int cpu)
139{
140 /* trigger one IPI single call on one CPU */
141 sparc32_ipi_ops->single(cpu);
142}
143
144void arch_send_call_function_ipi_mask(const struct cpumask *mask)
145{
146 int cpu;
147
148 /* trigger IPI mask call on each CPU */
149 for_each_cpu(cpu, mask)
150 sparc32_ipi_ops->mask_one(cpu);
151}
152
153void smp_resched_interrupt(void)
154{
155 irq_enter();
156 scheduler_ipi();
157 local_cpu_data().irq_resched_count++;
158 irq_exit();
159 /* re-schedule routine called by interrupt return code. */
160}
161
162void smp_call_function_single_interrupt(void)
163{
164 irq_enter();
165 generic_smp_call_function_single_interrupt();
166 local_cpu_data().irq_call_count++;
167 irq_exit();
168}
169
170void smp_call_function_interrupt(void)
171{
172 irq_enter();
173 generic_smp_call_function_interrupt();
174 local_cpu_data().irq_call_count++;
175 irq_exit();
176}
177
178int setup_profiling_timer(unsigned int multiplier)
179{
180 return -EINVAL;
181}
182
183void __init smp_prepare_cpus(unsigned int max_cpus)
184{
185 int i, cpuid, extra;
186
187 printk("Entering SMP Mode...\n");
188
189 extra = 0;
190 for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) {
191 if (cpuid >= NR_CPUS)
192 extra++;
193 }
194 /* i = number of cpus */
195 if (extra && max_cpus > i - extra)
196 printk("Warning: NR_CPUS is too low to start all cpus\n");
197
198 smp_store_cpu_info(boot_cpu_id);
199
200 switch(sparc_cpu_model) {
201 case sun4m:
202 smp4m_boot_cpus();
203 break;
204 case sun4d:
205 smp4d_boot_cpus();
206 break;
207 case sparc_leon:
208 leon_boot_cpus();
209 break;
210 case sun4e:
211 printk("SUN4E\n");
212 BUG();
213 break;
214 case sun4u:
215 printk("SUN4U\n");
216 BUG();
217 break;
218 default:
219 printk("UNKNOWN!\n");
220 BUG();
221 break;
222 }
223}
224
225/* Set this up early so that things like the scheduler can init
226 * properly. We use the same cpu mask for both the present and
227 * possible cpu map.
228 */
229void __init smp_setup_cpu_possible_map(void)
230{
231 int instance, mid;
232
233 instance = 0;
234 while (!cpu_find_by_instance(instance, NULL, &mid)) {
235 if (mid < NR_CPUS) {
236 set_cpu_possible(mid, true);
237 set_cpu_present(mid, true);
238 }
239 instance++;
240 }
241}
242
243void __init smp_prepare_boot_cpu(void)
244{
245 int cpuid = hard_smp_processor_id();
246
247 if (cpuid >= NR_CPUS) {
248 prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
249 prom_halt();
250 }
251 if (cpuid != 0)
252 printk("boot cpu id != 0, this could work but is untested\n");
253
254 current_thread_info()->cpu = cpuid;
255 set_cpu_online(cpuid, true);
256 set_cpu_possible(cpuid, true);
257}
258
259int __cpu_up(unsigned int cpu, struct task_struct *tidle)
260{
261 int ret=0;
262
263 switch(sparc_cpu_model) {
264 case sun4m:
265 ret = smp4m_boot_one_cpu(cpu, tidle);
266 break;
267 case sun4d:
268 ret = smp4d_boot_one_cpu(cpu, tidle);
269 break;
270 case sparc_leon:
271 ret = leon_boot_one_cpu(cpu, tidle);
272 break;
273 case sun4e:
274 printk("SUN4E\n");
275 BUG();
276 break;
277 case sun4u:
278 printk("SUN4U\n");
279 BUG();
280 break;
281 default:
282 printk("UNKNOWN!\n");
283 BUG();
284 break;
285 }
286
287 if (!ret) {
288 cpumask_set_cpu(cpu, &smp_commenced_mask);
289 while (!cpu_online(cpu))
290 mb();
291 }
292 return ret;
293}
294
295static void arch_cpu_pre_starting(void *arg)
296{
297 local_ops->cache_all();
298 local_ops->tlb_all();
299
300 switch(sparc_cpu_model) {
301 case sun4m:
302 sun4m_cpu_pre_starting(arg);
303 break;
304 case sun4d:
305 sun4d_cpu_pre_starting(arg);
306 break;
307 case sparc_leon:
308 leon_cpu_pre_starting(arg);
309 break;
310 default:
311 BUG();
312 }
313}
314
315static void arch_cpu_pre_online(void *arg)
316{
317 unsigned int cpuid = hard_smp_processor_id();
318
319 register_percpu_ce(cpuid);
320
321 calibrate_delay();
322 smp_store_cpu_info(cpuid);
323
324 local_ops->cache_all();
325 local_ops->tlb_all();
326
327 switch(sparc_cpu_model) {
328 case sun4m:
329 sun4m_cpu_pre_online(arg);
330 break;
331 case sun4d:
332 sun4d_cpu_pre_online(arg);
333 break;
334 case sparc_leon:
335 leon_cpu_pre_online(arg);
336 break;
337 default:
338 BUG();
339 }
340}
341
342static void sparc_start_secondary(void *arg)
343{
344 unsigned int cpu;
345
346 /*
347 * SMP booting is extremely fragile in some architectures. So run
348 * the cpu initialization code first before anything else.
349 */
350 arch_cpu_pre_starting(arg);
351
352 preempt_disable();
353 cpu = smp_processor_id();
354
355 notify_cpu_starting(cpu);
356 arch_cpu_pre_online(arg);
357
358 /* Set the CPU in the cpu_online_mask */
359 set_cpu_online(cpu, true);
360
361 /* Enable local interrupts now */
362 local_irq_enable();
363
364 wmb();
365 cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
366
367 /* We should never reach here! */
368 BUG();
369}
370
371void smp_callin(void)
372{
373 sparc_start_secondary(NULL);
374}
375
376void smp_bogo(struct seq_file *m)
377{
378 int i;
379
380 for_each_online_cpu(i) {
381 seq_printf(m,
382 "Cpu%dBogo\t: %lu.%02lu\n",
383 i,
384 cpu_data(i).udelay_val/(500000/HZ),
385 (cpu_data(i).udelay_val/(5000/HZ))%100);
386 }
387}
388
389void smp_info(struct seq_file *m)
390{
391 int i;
392
393 seq_printf(m, "State:\n");
394 for_each_online_cpu(i)
395 seq_printf(m, "CPU%d\t\t: online\n", i);
396}
1/* smp.c: Sparc SMP support.
2 *
3 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
4 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 * Copyright (C) 2004 Keith M Wesolowski (wesolows@foobazco.org)
6 */
7
8#include <asm/head.h>
9
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/threads.h>
13#include <linux/smp.h>
14#include <linux/interrupt.h>
15#include <linux/kernel_stat.h>
16#include <linux/init.h>
17#include <linux/spinlock.h>
18#include <linux/mm.h>
19#include <linux/fs.h>
20#include <linux/seq_file.h>
21#include <linux/cache.h>
22#include <linux/delay.h>
23
24#include <asm/ptrace.h>
25#include <linux/atomic.h>
26
27#include <asm/irq.h>
28#include <asm/page.h>
29#include <asm/pgalloc.h>
30#include <asm/pgtable.h>
31#include <asm/oplib.h>
32#include <asm/cacheflush.h>
33#include <asm/tlbflush.h>
34#include <asm/cpudata.h>
35#include <asm/leon.h>
36
37#include "irq.h"
38
39volatile unsigned long cpu_callin_map[NR_CPUS] __cpuinitdata = {0,};
40
41cpumask_t smp_commenced_mask = CPU_MASK_NONE;
42
43/* The only guaranteed locking primitive available on all Sparc
44 * processors is 'ldstub [%reg + immediate], %dest_reg' which atomically
45 * places the current byte at the effective address into dest_reg and
46 * places 0xff there afterwards. Pretty lame locking primitive
47 * compared to the Alpha and the Intel no? Most Sparcs have 'swap'
48 * instruction which is much better...
49 */
50
51void __cpuinit smp_store_cpu_info(int id)
52{
53 int cpu_node;
54 int mid;
55
56 cpu_data(id).udelay_val = loops_per_jiffy;
57
58 cpu_find_by_mid(id, &cpu_node);
59 cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
60 "clock-frequency", 0);
61 cpu_data(id).prom_node = cpu_node;
62 mid = cpu_get_hwmid(cpu_node);
63
64 if (mid < 0) {
65 printk(KERN_NOTICE "No MID found for CPU%d at node 0x%08d", id, cpu_node);
66 mid = 0;
67 }
68 cpu_data(id).mid = mid;
69}
70
71void __init smp_cpus_done(unsigned int max_cpus)
72{
73 extern void smp4m_smp_done(void);
74 extern void smp4d_smp_done(void);
75 unsigned long bogosum = 0;
76 int cpu, num = 0;
77
78 for_each_online_cpu(cpu) {
79 num++;
80 bogosum += cpu_data(cpu).udelay_val;
81 }
82
83 printk("Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
84 num, bogosum/(500000/HZ),
85 (bogosum/(5000/HZ))%100);
86
87 switch(sparc_cpu_model) {
88 case sun4:
89 printk("SUN4\n");
90 BUG();
91 break;
92 case sun4c:
93 printk("SUN4C\n");
94 BUG();
95 break;
96 case sun4m:
97 smp4m_smp_done();
98 break;
99 case sun4d:
100 smp4d_smp_done();
101 break;
102 case sparc_leon:
103 leon_smp_done();
104 break;
105 case sun4e:
106 printk("SUN4E\n");
107 BUG();
108 break;
109 case sun4u:
110 printk("SUN4U\n");
111 BUG();
112 break;
113 default:
114 printk("UNKNOWN!\n");
115 BUG();
116 break;
117 }
118}
119
120void cpu_panic(void)
121{
122 printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id());
123 panic("SMP bolixed\n");
124}
125
126struct linux_prom_registers smp_penguin_ctable __cpuinitdata = { 0 };
127
128void smp_send_reschedule(int cpu)
129{
130 /*
131 * CPU model dependent way of implementing IPI generation targeting
132 * a single CPU. The trap handler needs only to do trap entry/return
133 * to call schedule.
134 */
135 BTFIXUP_CALL(smp_ipi_resched)(cpu);
136}
137
138void smp_send_stop(void)
139{
140}
141
142void arch_send_call_function_single_ipi(int cpu)
143{
144 /* trigger one IPI single call on one CPU */
145 BTFIXUP_CALL(smp_ipi_single)(cpu);
146}
147
148void arch_send_call_function_ipi_mask(const struct cpumask *mask)
149{
150 int cpu;
151
152 /* trigger IPI mask call on each CPU */
153 for_each_cpu(cpu, mask)
154 BTFIXUP_CALL(smp_ipi_mask_one)(cpu);
155}
156
157void smp_resched_interrupt(void)
158{
159 irq_enter();
160 scheduler_ipi();
161 local_cpu_data().irq_resched_count++;
162 irq_exit();
163 /* re-schedule routine called by interrupt return code. */
164}
165
166void smp_call_function_single_interrupt(void)
167{
168 irq_enter();
169 generic_smp_call_function_single_interrupt();
170 local_cpu_data().irq_call_count++;
171 irq_exit();
172}
173
174void smp_call_function_interrupt(void)
175{
176 irq_enter();
177 generic_smp_call_function_interrupt();
178 local_cpu_data().irq_call_count++;
179 irq_exit();
180}
181
182void smp_flush_cache_all(void)
183{
184 xc0((smpfunc_t) BTFIXUP_CALL(local_flush_cache_all));
185 local_flush_cache_all();
186}
187
188void smp_flush_tlb_all(void)
189{
190 xc0((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_all));
191 local_flush_tlb_all();
192}
193
194void smp_flush_cache_mm(struct mm_struct *mm)
195{
196 if(mm->context != NO_CONTEXT) {
197 cpumask_t cpu_mask;
198 cpumask_copy(&cpu_mask, mm_cpumask(mm));
199 cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
200 if (!cpumask_empty(&cpu_mask))
201 xc1((smpfunc_t) BTFIXUP_CALL(local_flush_cache_mm), (unsigned long) mm);
202 local_flush_cache_mm(mm);
203 }
204}
205
206void smp_flush_tlb_mm(struct mm_struct *mm)
207{
208 if(mm->context != NO_CONTEXT) {
209 cpumask_t cpu_mask;
210 cpumask_copy(&cpu_mask, mm_cpumask(mm));
211 cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
212 if (!cpumask_empty(&cpu_mask)) {
213 xc1((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_mm), (unsigned long) mm);
214 if(atomic_read(&mm->mm_users) == 1 && current->active_mm == mm)
215 cpumask_copy(mm_cpumask(mm),
216 cpumask_of(smp_processor_id()));
217 }
218 local_flush_tlb_mm(mm);
219 }
220}
221
222void smp_flush_cache_range(struct vm_area_struct *vma, unsigned long start,
223 unsigned long end)
224{
225 struct mm_struct *mm = vma->vm_mm;
226
227 if (mm->context != NO_CONTEXT) {
228 cpumask_t cpu_mask;
229 cpumask_copy(&cpu_mask, mm_cpumask(mm));
230 cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
231 if (!cpumask_empty(&cpu_mask))
232 xc3((smpfunc_t) BTFIXUP_CALL(local_flush_cache_range), (unsigned long) vma, start, end);
233 local_flush_cache_range(vma, start, end);
234 }
235}
236
237void smp_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
238 unsigned long end)
239{
240 struct mm_struct *mm = vma->vm_mm;
241
242 if (mm->context != NO_CONTEXT) {
243 cpumask_t cpu_mask;
244 cpumask_copy(&cpu_mask, mm_cpumask(mm));
245 cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
246 if (!cpumask_empty(&cpu_mask))
247 xc3((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_range), (unsigned long) vma, start, end);
248 local_flush_tlb_range(vma, start, end);
249 }
250}
251
252void smp_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
253{
254 struct mm_struct *mm = vma->vm_mm;
255
256 if(mm->context != NO_CONTEXT) {
257 cpumask_t cpu_mask;
258 cpumask_copy(&cpu_mask, mm_cpumask(mm));
259 cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
260 if (!cpumask_empty(&cpu_mask))
261 xc2((smpfunc_t) BTFIXUP_CALL(local_flush_cache_page), (unsigned long) vma, page);
262 local_flush_cache_page(vma, page);
263 }
264}
265
266void smp_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
267{
268 struct mm_struct *mm = vma->vm_mm;
269
270 if(mm->context != NO_CONTEXT) {
271 cpumask_t cpu_mask;
272 cpumask_copy(&cpu_mask, mm_cpumask(mm));
273 cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
274 if (!cpumask_empty(&cpu_mask))
275 xc2((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_page), (unsigned long) vma, page);
276 local_flush_tlb_page(vma, page);
277 }
278}
279
280void smp_flush_page_to_ram(unsigned long page)
281{
282 /* Current theory is that those who call this are the one's
283 * who have just dirtied their cache with the pages contents
284 * in kernel space, therefore we only run this on local cpu.
285 *
286 * XXX This experiment failed, research further... -DaveM
287 */
288#if 1
289 xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_to_ram), page);
290#endif
291 local_flush_page_to_ram(page);
292}
293
294void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
295{
296 cpumask_t cpu_mask;
297 cpumask_copy(&cpu_mask, mm_cpumask(mm));
298 cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
299 if (!cpumask_empty(&cpu_mask))
300 xc2((smpfunc_t) BTFIXUP_CALL(local_flush_sig_insns), (unsigned long) mm, insn_addr);
301 local_flush_sig_insns(mm, insn_addr);
302}
303
304extern unsigned int lvl14_resolution;
305
306/* /proc/profile writes can call this, don't __init it please. */
307static DEFINE_SPINLOCK(prof_setup_lock);
308
309int setup_profiling_timer(unsigned int multiplier)
310{
311 int i;
312 unsigned long flags;
313
314 /* Prevent level14 ticker IRQ flooding. */
315 if((!multiplier) || (lvl14_resolution / multiplier) < 500)
316 return -EINVAL;
317
318 spin_lock_irqsave(&prof_setup_lock, flags);
319 for_each_possible_cpu(i) {
320 load_profile_irq(i, lvl14_resolution / multiplier);
321 prof_multiplier(i) = multiplier;
322 }
323 spin_unlock_irqrestore(&prof_setup_lock, flags);
324
325 return 0;
326}
327
328void __init smp_prepare_cpus(unsigned int max_cpus)
329{
330 extern void __init smp4m_boot_cpus(void);
331 extern void __init smp4d_boot_cpus(void);
332 int i, cpuid, extra;
333
334 printk("Entering SMP Mode...\n");
335
336 extra = 0;
337 for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) {
338 if (cpuid >= NR_CPUS)
339 extra++;
340 }
341 /* i = number of cpus */
342 if (extra && max_cpus > i - extra)
343 printk("Warning: NR_CPUS is too low to start all cpus\n");
344
345 smp_store_cpu_info(boot_cpu_id);
346
347 switch(sparc_cpu_model) {
348 case sun4:
349 printk("SUN4\n");
350 BUG();
351 break;
352 case sun4c:
353 printk("SUN4C\n");
354 BUG();
355 break;
356 case sun4m:
357 smp4m_boot_cpus();
358 break;
359 case sun4d:
360 smp4d_boot_cpus();
361 break;
362 case sparc_leon:
363 leon_boot_cpus();
364 break;
365 case sun4e:
366 printk("SUN4E\n");
367 BUG();
368 break;
369 case sun4u:
370 printk("SUN4U\n");
371 BUG();
372 break;
373 default:
374 printk("UNKNOWN!\n");
375 BUG();
376 break;
377 }
378}
379
380/* Set this up early so that things like the scheduler can init
381 * properly. We use the same cpu mask for both the present and
382 * possible cpu map.
383 */
384void __init smp_setup_cpu_possible_map(void)
385{
386 int instance, mid;
387
388 instance = 0;
389 while (!cpu_find_by_instance(instance, NULL, &mid)) {
390 if (mid < NR_CPUS) {
391 set_cpu_possible(mid, true);
392 set_cpu_present(mid, true);
393 }
394 instance++;
395 }
396}
397
398void __init smp_prepare_boot_cpu(void)
399{
400 int cpuid = hard_smp_processor_id();
401
402 if (cpuid >= NR_CPUS) {
403 prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
404 prom_halt();
405 }
406 if (cpuid != 0)
407 printk("boot cpu id != 0, this could work but is untested\n");
408
409 current_thread_info()->cpu = cpuid;
410 set_cpu_online(cpuid, true);
411 set_cpu_possible(cpuid, true);
412}
413
414int __cpuinit __cpu_up(unsigned int cpu)
415{
416 extern int __cpuinit smp4m_boot_one_cpu(int);
417 extern int __cpuinit smp4d_boot_one_cpu(int);
418 int ret=0;
419
420 switch(sparc_cpu_model) {
421 case sun4:
422 printk("SUN4\n");
423 BUG();
424 break;
425 case sun4c:
426 printk("SUN4C\n");
427 BUG();
428 break;
429 case sun4m:
430 ret = smp4m_boot_one_cpu(cpu);
431 break;
432 case sun4d:
433 ret = smp4d_boot_one_cpu(cpu);
434 break;
435 case sparc_leon:
436 ret = leon_boot_one_cpu(cpu);
437 break;
438 case sun4e:
439 printk("SUN4E\n");
440 BUG();
441 break;
442 case sun4u:
443 printk("SUN4U\n");
444 BUG();
445 break;
446 default:
447 printk("UNKNOWN!\n");
448 BUG();
449 break;
450 }
451
452 if (!ret) {
453 cpumask_set_cpu(cpu, &smp_commenced_mask);
454 while (!cpu_online(cpu))
455 mb();
456 }
457 return ret;
458}
459
460void smp_bogo(struct seq_file *m)
461{
462 int i;
463
464 for_each_online_cpu(i) {
465 seq_printf(m,
466 "Cpu%dBogo\t: %lu.%02lu\n",
467 i,
468 cpu_data(i).udelay_val/(500000/HZ),
469 (cpu_data(i).udelay_val/(5000/HZ))%100);
470 }
471}
472
473void smp_info(struct seq_file *m)
474{
475 int i;
476
477 seq_printf(m, "State:\n");
478 for_each_online_cpu(i)
479 seq_printf(m, "CPU%d\t\t: online\n", i);
480}