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9#include <linux/config.h>
10#include <linux/errno.h>
11#include <linux/linkage.h>
12#include <linux/kernel_stat.h>
13#include <linux/signal.h>
14#include <linux/sched.h>
15#include <linux/ptrace.h>
16#include <linux/interrupt.h>
17#include <linux/slab.h>
18#include <linux/random.h>
19#include <linux/init.h>
20#include <linux/smp.h>
21#include <linux/smp_lock.h>
22#include <linux/spinlock.h>
23#include <linux/seq_file.h>
24
25#include <asm/ptrace.h>
26#include <asm/processor.h>
27#include <asm/system.h>
28#include <asm/psr.h>
29#include <asm/smp.h>
30#include <asm/vaddrs.h>
31#include <asm/timer.h>
32#include <asm/openprom.h>
33#include <asm/oplib.h>
34#include <asm/traps.h>
35#include <asm/irq.h>
36#include <asm/io.h>
37#include <asm/pgalloc.h>
38#include <asm/pgtable.h>
39#include <asm/sbus.h>
40#include <asm/sbi.h>
41#include <asm/cacheflush.h>
42
43
44
45
46struct sun4d_timer_regs *sun4d_timers;
47#define TIMER_IRQ 10
48
49#define MAX_STATIC_ALLOC 4
50extern struct irqaction static_irqaction[MAX_STATIC_ALLOC];
51extern int static_irq_count;
52unsigned char cpu_leds[32];
53#ifdef CONFIG_SMP
54unsigned char sbus_tid[32];
55#endif
56
57extern struct irqaction *irq_action[];
58extern spinlock_t irq_action_lock;
59
60struct sbus_action {
61 struct irqaction *action;
62
63} *sbus_actions;
64
65static int pil_to_sbus[] = {
66 0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
67};
68
69static int sbus_to_pil[] = {
70 0, 2, 3, 5, 7, 9, 11, 13,
71};
72
73static int nsbi;
74#ifdef CONFIG_SMP
75DEFINE_SPINLOCK(sun4d_imsk_lock);
76#endif
77
78int show_sun4d_interrupts(struct seq_file *p, void *v)
79{
80 int i = *(loff_t *) v, j = 0, k = 0, sbusl;
81 struct irqaction * action;
82 unsigned long flags;
83#ifdef CONFIG_SMP
84 int x;
85#endif
86
87 spin_lock_irqsave(&irq_action_lock, flags);
88 if (i < NR_IRQS) {
89 sbusl = pil_to_sbus[i];
90 if (!sbusl) {
91 action = *(i + irq_action);
92 if (!action)
93 goto out_unlock;
94 } else {
95 for (j = 0; j < nsbi; j++) {
96 for (k = 0; k < 4; k++)
97 if ((action = sbus_actions [(j << 5) + (sbusl << 2) + k].action))
98 goto found_it;
99 }
100 goto out_unlock;
101 }
102found_it: seq_printf(p, "%3d: ", i);
103#ifndef CONFIG_SMP
104 seq_printf(p, "%10u ", kstat_irqs(i));
105#else
106 for (x = 0; x < NR_CPUS; x++) {
107 if (cpu_online(x))
108 seq_printf(p, "%10u ",
109 kstat_cpu(cpu_logical_map(x)).irqs[i]);
110 }
111#endif
112 seq_printf(p, "%c %s",
113 (action->flags & SA_INTERRUPT) ? '+' : ' ',
114 action->name);
115 action = action->next;
116 for (;;) {
117 for (; action; action = action->next) {
118 seq_printf(p, ",%s %s",
119 (action->flags & SA_INTERRUPT) ? " +" : "",
120 action->name);
121 }
122 if (!sbusl) break;
123 k++;
124 if (k < 4)
125 action = sbus_actions [(j << 5) + (sbusl << 2) + k].action;
126 else {
127 j++;
128 if (j == nsbi) break;
129 k = 0;
130 action = sbus_actions [(j << 5) + (sbusl << 2)].action;
131 }
132 }
133 seq_putc(p, '\n');
134 }
135out_unlock:
136 spin_unlock_irqrestore(&irq_action_lock, flags);
137 return 0;
138}
139
140void sun4d_free_irq(unsigned int irq, void *dev_id)
141{
142 struct irqaction *action, **actionp;
143 struct irqaction *tmp = NULL;
144 unsigned long flags;
145
146 spin_lock_irqsave(&irq_action_lock, flags);
147 if (irq < 15)
148 actionp = irq + irq_action;
149 else
150 actionp = &(sbus_actions[irq - (1 << 5)].action);
151 action = *actionp;
152 if (!action) {
153 printk("Trying to free free IRQ%d\n",irq);
154 goto out_unlock;
155 }
156 if (dev_id) {
157 for (; action; action = action->next) {
158 if (action->dev_id == dev_id)
159 break;
160 tmp = action;
161 }
162 if (!action) {
163 printk("Trying to free free shared IRQ%d\n",irq);
164 goto out_unlock;
165 }
166 } else if (action->flags & SA_SHIRQ) {
167 printk("Trying to free shared IRQ%d with NULL device ID\n", irq);
168 goto out_unlock;
169 }
170 if (action->flags & SA_STATIC_ALLOC)
171 {
172
173
174
175 printk("Attempt to free statically allocated IRQ%d (%s)\n",
176 irq, action->name);
177 goto out_unlock;
178 }
179
180 if (action && tmp)
181 tmp->next = action->next;
182 else
183 *actionp = action->next;
184
185 spin_unlock_irqrestore(&irq_action_lock, flags);
186
187 synchronize_irq(irq);
188
189 spin_lock_irqsave(&irq_action_lock, flags);
190
191 kfree(action);
192
193 if (!(*actionp))
194 disable_irq(irq);
195
196out_unlock:
197 spin_unlock_irqrestore(&irq_action_lock, flags);
198}
199
200extern void unexpected_irq(int, void *, struct pt_regs *);
201
202void sun4d_handler_irq(int irq, struct pt_regs * regs)
203{
204 struct irqaction * action;
205 int cpu = smp_processor_id();
206
207 int sbusl = pil_to_sbus[irq];
208
209
210 cc_get_ipen();
211
212 cc_set_iclr(1 << irq);
213
214 irq_enter();
215 kstat_cpu(cpu).irqs[irq]++;
216 if (!sbusl) {
217 action = *(irq + irq_action);
218 if (!action)
219 unexpected_irq(irq, NULL, regs);
220 do {
221 action->handler(irq, action->dev_id, regs);
222 action = action->next;
223 } while (action);
224 } else {
225 int bus_mask = bw_get_intr_mask(sbusl) & 0x3ffff;
226 int sbino;
227 struct sbus_action *actionp;
228 unsigned mask, slot;
229 int sbil = (sbusl << 2);
230
231 bw_clear_intr_mask(sbusl, bus_mask);
232
233
234 for (sbino = 0; bus_mask; sbino++, bus_mask >>= 1)
235 if (bus_mask & 1) {
236 mask = acquire_sbi(SBI2DEVID(sbino), 0xf << sbil);
237 mask &= (0xf << sbil);
238 actionp = sbus_actions + (sbino << 5) + (sbil);
239
240 for (slot = (1 << sbil); mask; slot <<= 1, actionp++)
241 if (mask & slot) {
242 mask &= ~slot;
243 action = actionp->action;
244
245 if (!action)
246 unexpected_irq(irq, NULL, regs);
247 do {
248 action->handler(irq, action->dev_id, regs);
249 action = action->next;
250 } while (action);
251 release_sbi(SBI2DEVID(sbino), slot);
252 }
253 }
254 }
255 irq_exit();
256}
257
258unsigned int sun4d_build_irq(struct sbus_dev *sdev, int irq)
259{
260 int sbusl = pil_to_sbus[irq];
261
262 if (sbusl)
263 return ((sdev->bus->board + 1) << 5) + (sbusl << 2) + sdev->slot;
264 else
265 return irq;
266}
267
268unsigned int sun4d_sbint_to_irq(struct sbus_dev *sdev, unsigned int sbint)
269{
270 if (sbint >= sizeof(sbus_to_pil)) {
271 printk(KERN_ERR "%s: bogus SBINT %d\n", sdev->prom_name, sbint);
272 BUG();
273 }
274 return sun4d_build_irq(sdev, sbus_to_pil[sbint]);
275}
276
277int sun4d_request_irq(unsigned int irq,
278 irqreturn_t (*handler)(int, void *, struct pt_regs *),
279 unsigned long irqflags, const char * devname, void *dev_id)
280{
281 struct irqaction *action, *tmp = NULL, **actionp;
282 unsigned long flags;
283 int ret;
284
285 if(irq > 14 && irq < (1 << 5)) {
286 ret = -EINVAL;
287 goto out;
288 }
289
290 if (!handler) {
291 ret = -EINVAL;
292 goto out;
293 }
294
295 spin_lock_irqsave(&irq_action_lock, flags);
296
297 if (irq >= (1 << 5))
298 actionp = &(sbus_actions[irq - (1 << 5)].action);
299 else
300 actionp = irq + irq_action;
301 action = *actionp;
302
303 if (action) {
304 if ((action->flags & SA_SHIRQ) && (irqflags & SA_SHIRQ)) {
305 for (tmp = action; tmp->next; tmp = tmp->next);
306 } else {
307 ret = -EBUSY;
308 goto out_unlock;
309 }
310 if ((action->flags & SA_INTERRUPT) ^ (irqflags & SA_INTERRUPT)) {
311 printk("Attempt to mix fast and slow interrupts on IRQ%d denied\n", irq);
312 ret = -EBUSY;
313 goto out_unlock;
314 }
315 action = NULL;
316 }
317
318
319
320
321 if (irqflags & SA_STATIC_ALLOC) {
322 if (static_irq_count < MAX_STATIC_ALLOC)
323 action = &static_irqaction[static_irq_count++];
324 else
325 printk("Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n", irq, devname);
326 }
327
328 if (action == NULL)
329 action = (struct irqaction *)kmalloc(sizeof(struct irqaction),
330 GFP_ATOMIC);
331
332 if (!action) {
333 ret = -ENOMEM;
334 goto out_unlock;
335 }
336
337 action->handler = handler;
338 action->flags = irqflags;
339 cpus_clear(action->mask);
340 action->name = devname;
341 action->next = NULL;
342 action->dev_id = dev_id;
343
344 if (tmp)
345 tmp->next = action;
346 else
347 *actionp = action;
348
349 enable_irq(irq);
350
351 ret = 0;
352out_unlock:
353 spin_unlock_irqrestore(&irq_action_lock, flags);
354out:
355 return ret;
356}
357
358static void sun4d_disable_irq(unsigned int irq)
359{
360#ifdef CONFIG_SMP
361 int tid = sbus_tid[(irq >> 5) - 1];
362 unsigned long flags;
363#endif
364
365 if (irq < NR_IRQS) return;
366#ifdef CONFIG_SMP
367 spin_lock_irqsave(&sun4d_imsk_lock, flags);
368 cc_set_imsk_other(tid, cc_get_imsk_other(tid) | (1 << sbus_to_pil[(irq >> 2) & 7]));
369 spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
370#else
371 cc_set_imsk(cc_get_imsk() | (1 << sbus_to_pil[(irq >> 2) & 7]));
372#endif
373}
374
375static void sun4d_enable_irq(unsigned int irq)
376{
377#ifdef CONFIG_SMP
378 int tid = sbus_tid[(irq >> 5) - 1];
379 unsigned long flags;
380#endif
381
382 if (irq < NR_IRQS) return;
383#ifdef CONFIG_SMP
384 spin_lock_irqsave(&sun4d_imsk_lock, flags);
385 cc_set_imsk_other(tid, cc_get_imsk_other(tid) & ~(1 << sbus_to_pil[(irq >> 2) & 7]));
386 spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
387#else
388 cc_set_imsk(cc_get_imsk() & ~(1 << sbus_to_pil[(irq >> 2) & 7]));
389#endif
390}
391
392#ifdef CONFIG_SMP
393static void sun4d_set_cpu_int(int cpu, int level)
394{
395 sun4d_send_ipi(cpu, level);
396}
397
398static void sun4d_clear_ipi(int cpu, int level)
399{
400}
401
402static void sun4d_set_udt(int cpu)
403{
404}
405
406
407void __init sun4d_distribute_irqs(void)
408{
409#ifdef DISTRIBUTE_IRQS
410 struct sbus_bus *sbus;
411 unsigned long sbus_serving_map;
412
413 sbus_serving_map = cpu_present_map;
414 for_each_sbus(sbus) {
415 if ((sbus->board * 2) == boot_cpu_id && (cpu_present_map & (1 << (sbus->board * 2 + 1))))
416 sbus_tid[sbus->board] = (sbus->board * 2 + 1);
417 else if (cpu_present_map & (1 << (sbus->board * 2)))
418 sbus_tid[sbus->board] = (sbus->board * 2);
419 else if (cpu_present_map & (1 << (sbus->board * 2 + 1)))
420 sbus_tid[sbus->board] = (sbus->board * 2 + 1);
421 else
422 sbus_tid[sbus->board] = 0xff;
423 if (sbus_tid[sbus->board] != 0xff)
424 sbus_serving_map &= ~(1 << sbus_tid[sbus->board]);
425 }
426 for_each_sbus(sbus)
427 if (sbus_tid[sbus->board] == 0xff) {
428 int i = 31;
429
430 if (!sbus_serving_map)
431 sbus_serving_map = cpu_present_map;
432 while (!(sbus_serving_map & (1 << i)))
433 i--;
434 sbus_tid[sbus->board] = i;
435 sbus_serving_map &= ~(1 << i);
436 }
437 for_each_sbus(sbus) {
438 printk("sbus%d IRQs directed to CPU%d\n", sbus->board, sbus_tid[sbus->board]);
439 set_sbi_tid(sbus->devid, sbus_tid[sbus->board] << 3);
440 }
441#else
442 struct sbus_bus *sbus;
443 int cpuid = cpu_logical_map(1);
444
445 if (cpuid == -1)
446 cpuid = cpu_logical_map(0);
447 for_each_sbus(sbus) {
448 sbus_tid[sbus->board] = cpuid;
449 set_sbi_tid(sbus->devid, cpuid << 3);
450 }
451 printk("All sbus IRQs directed to CPU%d\n", cpuid);
452#endif
453}
454#endif
455
456static void sun4d_clear_clock_irq(void)
457{
458 volatile unsigned int clear_intr;
459 clear_intr = sun4d_timers->l10_timer_limit;
460}
461
462static void sun4d_clear_profile_irq(int cpu)
463{
464 bw_get_prof_limit(cpu);
465}
466
467static void sun4d_load_profile_irq(int cpu, unsigned int limit)
468{
469 bw_set_prof_limit(cpu, limit);
470}
471
472static void __init sun4d_init_timers(irqreturn_t (*counter_fn)(int, void *, struct pt_regs *))
473{
474 int irq;
475 int cpu;
476 struct resource r;
477 int mid;
478
479
480 memset(&r, 0, sizeof(r));
481#ifdef CONFIG_SMP
482 r.start = CSR_BASE(boot_cpu_id)+BW_TIMER_LIMIT;
483#else
484 r.start = CSR_BASE(0)+BW_TIMER_LIMIT;
485#endif
486 r.flags = 0xf;
487 sun4d_timers = (struct sun4d_timer_regs *) sbus_ioremap(&r, 0,
488 PAGE_SIZE, "user timer");
489
490 sun4d_timers->l10_timer_limit = (((1000000/HZ) + 1) << 10);
491 master_l10_counter = &sun4d_timers->l10_cur_count;
492 master_l10_limit = &sun4d_timers->l10_timer_limit;
493
494 irq = request_irq(TIMER_IRQ,
495 counter_fn,
496 (SA_INTERRUPT | SA_STATIC_ALLOC),
497 "timer", NULL);
498 if (irq) {
499 prom_printf("time_init: unable to attach IRQ%d\n",TIMER_IRQ);
500 prom_halt();
501 }
502
503
504
505
506 cpu = 0;
507 while (!cpu_find_by_instance(cpu, NULL, &mid)) {
508 sun4d_load_profile_irq(mid >> 3, 0);
509 cpu++;
510 }
511
512#ifdef CONFIG_SMP
513 {
514 unsigned long flags;
515 extern unsigned long lvl14_save[4];
516 struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];
517 extern unsigned int real_irq_entry[], smp4d_ticker[];
518 extern unsigned int patchme_maybe_smp_msg[];
519
520
521 lvl14_save[2] += smp4d_ticker - real_irq_entry;
522
523
524
525
526
527 local_irq_save(flags);
528 patchme_maybe_smp_msg[0] = 0x01000000;
529 trap_table->inst_one = lvl14_save[0];
530 trap_table->inst_two = lvl14_save[1];
531 trap_table->inst_three = lvl14_save[2];
532 trap_table->inst_four = lvl14_save[3];
533 local_flush_cache_all();
534 local_irq_restore(flags);
535 }
536#endif
537}
538
539void __init sun4d_init_sbi_irq(void)
540{
541 struct sbus_bus *sbus;
542 unsigned mask;
543
544 nsbi = 0;
545 for_each_sbus(sbus)
546 nsbi++;
547 sbus_actions = (struct sbus_action *)kmalloc (nsbi * 8 * 4 * sizeof(struct sbus_action), GFP_ATOMIC);
548 memset (sbus_actions, 0, (nsbi * 8 * 4 * sizeof(struct sbus_action)));
549 for_each_sbus(sbus) {
550#ifdef CONFIG_SMP
551 extern unsigned char boot_cpu_id;
552
553 set_sbi_tid(sbus->devid, boot_cpu_id << 3);
554 sbus_tid[sbus->board] = boot_cpu_id;
555#endif
556
557 mask = acquire_sbi(sbus->devid, 0xffffffff);
558 if (mask) {
559 printk ("Clearing pending IRQs %08x on SBI %d\n", mask, sbus->board);
560 release_sbi(sbus->devid, mask);
561 }
562 }
563}
564
565static char *sun4d_irq_itoa(unsigned int irq)
566{
567 static char buff[16];
568
569 if (irq < (1 << 5))
570 sprintf(buff, "%d", irq);
571 else
572 sprintf(buff, "%d,%x", sbus_to_pil[(irq >> 2) & 7], irq);
573 return buff;
574}
575
576void __init sun4d_init_IRQ(void)
577{
578 local_irq_disable();
579
580 BTFIXUPSET_CALL(sbint_to_irq, sun4d_sbint_to_irq, BTFIXUPCALL_NORM);
581 BTFIXUPSET_CALL(enable_irq, sun4d_enable_irq, BTFIXUPCALL_NORM);
582 BTFIXUPSET_CALL(disable_irq, sun4d_disable_irq, BTFIXUPCALL_NORM);
583 BTFIXUPSET_CALL(clear_clock_irq, sun4d_clear_clock_irq, BTFIXUPCALL_NORM);
584 BTFIXUPSET_CALL(clear_profile_irq, sun4d_clear_profile_irq, BTFIXUPCALL_NORM);
585 BTFIXUPSET_CALL(load_profile_irq, sun4d_load_profile_irq, BTFIXUPCALL_NORM);
586 BTFIXUPSET_CALL(__irq_itoa, sun4d_irq_itoa, BTFIXUPCALL_NORM);
587 sparc_init_timers = sun4d_init_timers;
588#ifdef CONFIG_SMP
589 BTFIXUPSET_CALL(set_cpu_int, sun4d_set_cpu_int, BTFIXUPCALL_NORM);
590 BTFIXUPSET_CALL(clear_cpu_int, sun4d_clear_ipi, BTFIXUPCALL_NOP);
591 BTFIXUPSET_CALL(set_irq_udt, sun4d_set_udt, BTFIXUPCALL_NOP);
592#endif
593
594}
595
