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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
50
51
52
53
54
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
128
129
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
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
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
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
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
226
227
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
348
349
350 arch_cpu_pre_starting(arg);
351
352 preempt_disable();
353 cpu = smp_processor_id();
354
355
356 notify_cpu_starting(cpu);
357
358 arch_cpu_pre_online(arg);
359
360
361 set_cpu_online(cpu, true);
362
363
364 local_irq_enable();
365
366 wmb();
367 cpu_startup_entry(CPUHP_ONLINE);
368
369
370 BUG();
371}
372
373void smp_callin(void)
374{
375 sparc_start_secondary(NULL);
376}
377
378void smp_bogo(struct seq_file *m)
379{
380 int i;
381
382 for_each_online_cpu(i) {
383 seq_printf(m,
384 "Cpu%dBogo\t: %lu.%02lu\n",
385 i,
386 cpu_data(i).udelay_val/(500000/HZ),
387 (cpu_data(i).udelay_val/(5000/HZ))%100);
388 }
389}
390
391void smp_info(struct seq_file *m)
392{
393 int i;
394
395 seq_printf(m, "State:\n");
396 for_each_online_cpu(i)
397 seq_printf(m, "CPU%d\t\t: online\n", i);
398}
399
