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9#include <asm/head.h>
10
11#include <linux/kernel.h>
12#include <linux/sched.h>
13#include <linux/threads.h>
14#include <linux/smp.h>
15#include <linux/interrupt.h>
16#include <linux/kernel_stat.h>
17#include <linux/init.h>
18#include <linux/spinlock.h>
19#include <linux/mm.h>
20#include <linux/fs.h>
21#include <linux/seq_file.h>
22#include <linux/cache.h>
23#include <linux/delay.h>
24#include <linux/profile.h>
25#include <linux/cpu.h>
26
27#include <asm/ptrace.h>
28#include <linux/atomic.h>
29
30#include <asm/irq.h>
31#include <asm/page.h>
32#include <asm/oplib.h>
33#include <asm/cacheflush.h>
34#include <asm/tlbflush.h>
35#include <asm/cpudata.h>
36#include <asm/timer.h>
37#include <asm/leon.h>
38
39#include "kernel.h"
40#include "irq.h"
41
42volatile unsigned long cpu_callin_map[NR_CPUS] = {0,};
43
44cpumask_t smp_commenced_mask = CPU_MASK_NONE;
45
46const struct sparc32_ipi_ops *sparc32_ipi_ops;
47
48
49
50
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52
53
54
55
56void smp_store_cpu_info(int id)
57{
58 int cpu_node;
59 int mid;
60
61 cpu_data(id).udelay_val = loops_per_jiffy;
62
63 cpu_find_by_mid(id, &cpu_node);
64 cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
65 "clock-frequency", 0);
66 cpu_data(id).prom_node = cpu_node;
67 mid = cpu_get_hwmid(cpu_node);
68
69 if (mid < 0) {
70 printk(KERN_NOTICE "No MID found for CPU%d at node 0x%08x", id, cpu_node);
71 mid = 0;
72 }
73 cpu_data(id).mid = mid;
74}
75
76void __init smp_cpus_done(unsigned int max_cpus)
77{
78 unsigned long bogosum = 0;
79 int cpu, num = 0;
80
81 for_each_online_cpu(cpu) {
82 num++;
83 bogosum += cpu_data(cpu).udelay_val;
84 }
85
86 printk("Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
87 num, bogosum/(500000/HZ),
88 (bogosum/(5000/HZ))%100);
89
90 switch(sparc_cpu_model) {
91 case sun4m:
92 smp4m_smp_done();
93 break;
94 case sun4d:
95 smp4d_smp_done();
96 break;
97 case sparc_leon:
98 leon_smp_done();
99 break;
100 case sun4e:
101 printk("SUN4E\n");
102 BUG();
103 break;
104 case sun4u:
105 printk("SUN4U\n");
106 BUG();
107 break;
108 default:
109 printk("UNKNOWN!\n");
110 BUG();
111 break;
112 }
113}
114
115void cpu_panic(void)
116{
117 printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id());
118 panic("SMP bolixed\n");
119}
120
121struct linux_prom_registers smp_penguin_ctable = { 0 };
122
123void smp_send_reschedule(int cpu)
124{
125
126
127
128
129
130 sparc32_ipi_ops->resched(cpu);
131}
132
133void smp_send_stop(void)
134{
135}
136
137void arch_send_call_function_single_ipi(int cpu)
138{
139
140 sparc32_ipi_ops->single(cpu);
141}
142
143void arch_send_call_function_ipi_mask(const struct cpumask *mask)
144{
145 int cpu;
146
147
148 for_each_cpu(cpu, mask)
149 sparc32_ipi_ops->mask_one(cpu);
150}
151
152void smp_resched_interrupt(void)
153{
154 irq_enter();
155 scheduler_ipi();
156 local_cpu_data().irq_resched_count++;
157 irq_exit();
158
159}
160
161void smp_call_function_single_interrupt(void)
162{
163 irq_enter();
164 generic_smp_call_function_single_interrupt();
165 local_cpu_data().irq_call_count++;
166 irq_exit();
167}
168
169void smp_call_function_interrupt(void)
170{
171 irq_enter();
172 generic_smp_call_function_interrupt();
173 local_cpu_data().irq_call_count++;
174 irq_exit();
175}
176
177int setup_profiling_timer(unsigned int multiplier)
178{
179 return -EINVAL;
180}
181
182void __init smp_prepare_cpus(unsigned int max_cpus)
183{
184 int i, cpuid, extra;
185
186 printk("Entering SMP Mode...\n");
187
188 extra = 0;
189 for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) {
190 if (cpuid >= NR_CPUS)
191 extra++;
192 }
193
194 if (extra && max_cpus > i - extra)
195 printk("Warning: NR_CPUS is too low to start all cpus\n");
196
197 smp_store_cpu_info(boot_cpu_id);
198
199 switch(sparc_cpu_model) {
200 case sun4m:
201 smp4m_boot_cpus();
202 break;
203 case sun4d:
204 smp4d_boot_cpus();
205 break;
206 case sparc_leon:
207 leon_boot_cpus();
208 break;
209 case sun4e:
210 printk("SUN4E\n");
211 BUG();
212 break;
213 case sun4u:
214 printk("SUN4U\n");
215 BUG();
216 break;
217 default:
218 printk("UNKNOWN!\n");
219 BUG();
220 break;
221 }
222}
223
224
225
226
227
228void __init smp_setup_cpu_possible_map(void)
229{
230 int instance, mid;
231
232 instance = 0;
233 while (!cpu_find_by_instance(instance, NULL, &mid)) {
234 if (mid < NR_CPUS) {
235 set_cpu_possible(mid, true);
236 set_cpu_present(mid, true);
237 }
238 instance++;
239 }
240}
241
242void __init smp_prepare_boot_cpu(void)
243{
244 int cpuid = hard_smp_processor_id();
245
246 if (cpuid >= NR_CPUS) {
247 prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
248 prom_halt();
249 }
250 if (cpuid != 0)
251 printk("boot cpu id != 0, this could work but is untested\n");
252
253 current_thread_info()->cpu = cpuid;
254 set_cpu_online(cpuid, true);
255 set_cpu_possible(cpuid, true);
256}
257
258int __cpu_up(unsigned int cpu, struct task_struct *tidle)
259{
260 int ret=0;
261
262 switch(sparc_cpu_model) {
263 case sun4m:
264 ret = smp4m_boot_one_cpu(cpu, tidle);
265 break;
266 case sun4d:
267 ret = smp4d_boot_one_cpu(cpu, tidle);
268 break;
269 case sparc_leon:
270 ret = leon_boot_one_cpu(cpu, tidle);
271 break;
272 case sun4e:
273 printk("SUN4E\n");
274 BUG();
275 break;
276 case sun4u:
277 printk("SUN4U\n");
278 BUG();
279 break;
280 default:
281 printk("UNKNOWN!\n");
282 BUG();
283 break;
284 }
285
286 if (!ret) {
287 cpumask_set_cpu(cpu, &smp_commenced_mask);
288 while (!cpu_online(cpu))
289 mb();
290 }
291 return ret;
292}
293
294static void arch_cpu_pre_starting(void *arg)
295{
296 local_ops->cache_all();
297 local_ops->tlb_all();
298
299 switch(sparc_cpu_model) {
300 case sun4m:
301 sun4m_cpu_pre_starting(arg);
302 break;
303 case sun4d:
304 sun4d_cpu_pre_starting(arg);
305 break;
306 case sparc_leon:
307 leon_cpu_pre_starting(arg);
308 break;
309 default:
310 BUG();
311 }
312}
313
314static void arch_cpu_pre_online(void *arg)
315{
316 unsigned int cpuid = hard_smp_processor_id();
317
318 register_percpu_ce(cpuid);
319
320 calibrate_delay();
321 smp_store_cpu_info(cpuid);
322
323 local_ops->cache_all();
324 local_ops->tlb_all();
325
326 switch(sparc_cpu_model) {
327 case sun4m:
328 sun4m_cpu_pre_online(arg);
329 break;
330 case sun4d:
331 sun4d_cpu_pre_online(arg);
332 break;
333 case sparc_leon:
334 leon_cpu_pre_online(arg);
335 break;
336 default:
337 BUG();
338 }
339}
340
341static void sparc_start_secondary(void *arg)
342{
343 unsigned int cpu;
344
345
346
347
348
349 arch_cpu_pre_starting(arg);
350
351 preempt_disable();
352 cpu = smp_processor_id();
353
354 notify_cpu_starting(cpu);
355 arch_cpu_pre_online(arg);
356
357
358 set_cpu_online(cpu, true);
359
360
361 local_irq_enable();
362
363 wmb();
364 cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
365
366
367 BUG();
368}
369
370void smp_callin(void)
371{
372 sparc_start_secondary(NULL);
373}
374
375void smp_bogo(struct seq_file *m)
376{
377 int i;
378
379 for_each_online_cpu(i) {
380 seq_printf(m,
381 "Cpu%dBogo\t: %lu.%02lu\n",
382 i,
383 cpu_data(i).udelay_val/(500000/HZ),
384 (cpu_data(i).udelay_val/(5000/HZ))%100);
385 }
386}
387
388void smp_info(struct seq_file *m)
389{
390 int i;
391
392 seq_printf(m, "State:\n");
393 for_each_online_cpu(i)
394 seq_printf(m, "CPU%d\t\t: online\n", i);
395}
396
