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9#include <linux/errno.h>
10#include <linux/linkage.h>
11#include <linux/kernel_stat.h>
12#include <linux/signal.h>
13#include <linux/sched.h>
14#include <linux/ptrace.h>
15#include <linux/interrupt.h>
16#include <linux/slab.h>
17#include <linux/random.h>
18#include <linux/init.h>
19#include <linux/smp.h>
20#include <linux/spinlock.h>
21#include <linux/seq_file.h>
22
23#include <asm/ptrace.h>
24#include <asm/processor.h>
25#include <asm/system.h>
26#include <asm/psr.h>
27#include <asm/smp.h>
28#include <asm/vaddrs.h>
29#include <asm/timer.h>
30#include <asm/openprom.h>
31#include <asm/oplib.h>
32#include <asm/traps.h>
33#include <asm/irq.h>
34#include <asm/io.h>
35#include <asm/pgalloc.h>
36#include <asm/pgtable.h>
37#include <asm/sbus.h>
38#include <asm/sbi.h>
39#include <asm/cacheflush.h>
40#include <asm/irq_regs.h>
41
42#include "irq.h"
43
44
45
46
47struct sun4d_timer_regs *sun4d_timers;
48#define TIMER_IRQ 10
49
50#define MAX_STATIC_ALLOC 4
51extern struct irqaction static_irqaction[MAX_STATIC_ALLOC];
52extern int static_irq_count;
53unsigned char cpu_leds[32];
54#ifdef CONFIG_SMP
55unsigned char sbus_tid[32];
56#endif
57
58static struct irqaction *irq_action[NR_IRQS];
59extern spinlock_t irq_action_lock;
60
61struct sbus_action {
62 struct irqaction *action;
63
64} *sbus_actions;
65
66static int pil_to_sbus[] = {
67 0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
68};
69
70static int sbus_to_pil[] = {
71 0, 2, 3, 5, 7, 9, 11, 13,
72};
73
74static int nsbi;
75#ifdef CONFIG_SMP
76DEFINE_SPINLOCK(sun4d_imsk_lock);
77#endif
78
79int show_sun4d_interrupts(struct seq_file *p, void *v)
80{
81 int i = *(loff_t *) v, j = 0, k = 0, sbusl;
82 struct irqaction * action;
83 unsigned long flags;
84#ifdef CONFIG_SMP
85 int x;
86#endif
87
88 spin_lock_irqsave(&irq_action_lock, flags);
89 if (i < NR_IRQS) {
90 sbusl = pil_to_sbus[i];
91 if (!sbusl) {
92 action = *(i + irq_action);
93 if (!action)
94 goto out_unlock;
95 } else {
96 for (j = 0; j < nsbi; j++) {
97 for (k = 0; k < 4; k++)
98 if ((action = sbus_actions [(j << 5) + (sbusl << 2) + k].action))
99 goto found_it;
100 }
101 goto out_unlock;
102 }
103found_it: seq_printf(p, "%3d: ", i);
104#ifndef CONFIG_SMP
105 seq_printf(p, "%10u ", kstat_irqs(i));
106#else
107 for_each_online_cpu(x)
108 seq_printf(p, "%10u ",
109 kstat_cpu(cpu_logical_map(x)).irqs[i]);
110#endif
111 seq_printf(p, "%c %s",
112 (action->flags & IRQF_DISABLED) ? '+' : ' ',
113 action->name);
114 action = action->next;
115 for (;;) {
116 for (; action; action = action->next) {
117 seq_printf(p, ",%s %s",
118 (action->flags & IRQF_DISABLED) ? " +" : "",
119 action->name);
120 }
121 if (!sbusl) break;
122 k++;
123 if (k < 4)
124 action = sbus_actions [(j << 5) + (sbusl << 2) + k].action;
125 else {
126 j++;
127 if (j == nsbi) break;
128 k = 0;
129 action = sbus_actions [(j << 5) + (sbusl << 2)].action;
130 }
131 }
132 seq_putc(p, '\n');
133 }
134out_unlock:
135 spin_unlock_irqrestore(&irq_action_lock, flags);
136 return 0;
137}
138
139void sun4d_free_irq(unsigned int irq, void *dev_id)
140{
141 struct irqaction *action, **actionp;
142 struct irqaction *tmp = NULL;
143 unsigned long flags;
144
145 spin_lock_irqsave(&irq_action_lock, flags);
146 if (irq < 15)
147 actionp = irq + irq_action;
148 else
149 actionp = &(sbus_actions[irq - (1 << 5)].action);
150 action = *actionp;
151 if (!action) {
152 printk("Trying to free free IRQ%d\n",irq);
153 goto out_unlock;
154 }
155 if (dev_id) {
156 for (; action; action = action->next) {
157 if (action->dev_id == dev_id)
158 break;
159 tmp = action;
160 }
161 if (!action) {
162 printk("Trying to free free shared IRQ%d\n",irq);
163 goto out_unlock;
164 }
165 } else if (action->flags & IRQF_SHARED) {
166 printk("Trying to free shared IRQ%d with NULL device ID\n", irq);
167 goto out_unlock;
168 }
169 if (action->flags & SA_STATIC_ALLOC)
170 {
171
172
173
174 printk("Attempt to free statically allocated IRQ%d (%s)\n",
175 irq, action->name);
176 goto out_unlock;
177 }
178
179 if (action && tmp)
180 tmp->next = action->next;
181 else
182 *actionp = action->next;
183
184 spin_unlock_irqrestore(&irq_action_lock, flags);
185
186 synchronize_irq(irq);
187
188 spin_lock_irqsave(&irq_action_lock, flags);
189
190 kfree(action);
191
192 if (!(*actionp))
193 __disable_irq(irq);
194
195out_unlock:
196 spin_unlock_irqrestore(&irq_action_lock, flags);
197}
198
199extern void unexpected_irq(int, void *, struct pt_regs *);
200
201void sun4d_handler_irq(int irq, struct pt_regs * regs)
202{
203 struct pt_regs *old_regs;
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 old_regs = set_irq_regs(regs);
215 irq_enter();
216 kstat_cpu(cpu).irqs[irq]++;
217 if (!sbusl) {
218 action = *(irq + irq_action);
219 if (!action)
220 unexpected_irq(irq, NULL, regs);
221 do {
222 action->handler(irq, action->dev_id);
223 action = action->next;
224 } while (action);
225 } else {
226 int bus_mask = bw_get_intr_mask(sbusl) & 0x3ffff;
227 int sbino;
228 struct sbus_action *actionp;
229 unsigned mask, slot;
230 int sbil = (sbusl << 2);
231
232 bw_clear_intr_mask(sbusl, bus_mask);
233
234
235 for (sbino = 0; bus_mask; sbino++, bus_mask >>= 1)
236 if (bus_mask & 1) {
237 mask = acquire_sbi(SBI2DEVID(sbino), 0xf << sbil);
238 mask &= (0xf << sbil);
239 actionp = sbus_actions + (sbino << 5) + (sbil);
240
241 for (slot = (1 << sbil); mask; slot <<= 1, actionp++)
242 if (mask & slot) {
243 mask &= ~slot;
244 action = actionp->action;
245
246 if (!action)
247 unexpected_irq(irq, NULL, regs);
248 do {
249 action->handler(irq, action->dev_id);
250 action = action->next;
251 } while (action);
252 release_sbi(SBI2DEVID(sbino), slot);
253 }
254 }
255 }
256 irq_exit();
257 set_irq_regs(old_regs);
258}
259
260unsigned int sun4d_build_irq(struct sbus_dev *sdev, int irq)
261{
262 int sbusl = pil_to_sbus[irq];
263
264 if (sbusl)
265 return ((sdev->bus->board + 1) << 5) + (sbusl << 2) + sdev->slot;
266 else
267 return irq;
268}
269
270unsigned int sun4d_sbint_to_irq(struct sbus_dev *sdev, unsigned int sbint)
271{
272 if (sbint >= sizeof(sbus_to_pil)) {
273 printk(KERN_ERR "%s: bogus SBINT %d\n", sdev->prom_name, sbint);
274 BUG();
275 }
276 return sun4d_build_irq(sdev, sbus_to_pil[sbint]);
277}
278
279int sun4d_request_irq(unsigned int irq,
280 irq_handler_t handler,
281 unsigned long irqflags, const char * devname, void *dev_id)
282{
283 struct irqaction *action, *tmp = NULL, **actionp;
284 unsigned long flags;
285 int ret;
286
287 if(irq > 14 && irq < (1 << 5)) {
288 ret = -EINVAL;
289 goto out;
290 }
291
292 if (!handler) {
293 ret = -EINVAL;
294 goto out;
295 }
296
297 spin_lock_irqsave(&irq_action_lock, flags);
298
299 if (irq >= (1 << 5))
300 actionp = &(sbus_actions[irq - (1 << 5)].action);
301 else
302 actionp = irq + irq_action;
303 action = *actionp;
304
305 if (action) {
306 if ((action->flags & IRQF_SHARED) && (irqflags & IRQF_SHARED)) {
307 for (tmp = action; tmp->next; tmp = tmp->next);
308 } else {
309 ret = -EBUSY;
310 goto out_unlock;
311 }
312 if ((action->flags & IRQF_DISABLED) ^ (irqflags & IRQF_DISABLED)) {
313 printk("Attempt to mix fast and slow interrupts on IRQ%d denied\n", irq);
314 ret = -EBUSY;
315 goto out_unlock;
316 }
317 action = NULL;
318 }
319
320
321
322
323 if (irqflags & SA_STATIC_ALLOC) {
324 if (static_irq_count < MAX_STATIC_ALLOC)
325 action = &static_irqaction[static_irq_count++];
326 else
327 printk("Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n", irq, devname);
328 }
329
330 if (action == NULL)
331 action = kmalloc(sizeof(struct irqaction),
332 GFP_ATOMIC);
333
334 if (!action) {
335 ret = -ENOMEM;
336 goto out_unlock;
337 }
338
339 action->handler = handler;
340 action->flags = irqflags;
341 cpus_clear(action->mask);
342 action->name = devname;
343 action->next = NULL;
344 action->dev_id = dev_id;
345
346 if (tmp)
347 tmp->next = action;
348 else
349 *actionp = action;
350
351 __enable_irq(irq);
352
353 ret = 0;
354out_unlock:
355 spin_unlock_irqrestore(&irq_action_lock, flags);
356out:
357 return ret;
358}
359
360static void sun4d_disable_irq(unsigned int irq)
361{
362#ifdef CONFIG_SMP
363 int tid = sbus_tid[(irq >> 5) - 1];
364 unsigned long flags;
365#endif
366
367 if (irq < NR_IRQS) return;
368#ifdef CONFIG_SMP
369 spin_lock_irqsave(&sun4d_imsk_lock, flags);
370 cc_set_imsk_other(tid, cc_get_imsk_other(tid) | (1 << sbus_to_pil[(irq >> 2) & 7]));
371 spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
372#else
373 cc_set_imsk(cc_get_imsk() | (1 << sbus_to_pil[(irq >> 2) & 7]));
374#endif
375}
376
377static void sun4d_enable_irq(unsigned int irq)
378{
379#ifdef CONFIG_SMP
380 int tid = sbus_tid[(irq >> 5) - 1];
381 unsigned long flags;
382#endif
383
384 if (irq < NR_IRQS) return;
385#ifdef CONFIG_SMP
386 spin_lock_irqsave(&sun4d_imsk_lock, flags);
387 cc_set_imsk_other(tid, cc_get_imsk_other(tid) & ~(1 << sbus_to_pil[(irq >> 2) & 7]));
388 spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
389#else
390 cc_set_imsk(cc_get_imsk() & ~(1 << sbus_to_pil[(irq >> 2) & 7]));
391#endif
392}
393
394#ifdef CONFIG_SMP
395static void sun4d_set_cpu_int(int cpu, int level)
396{
397 sun4d_send_ipi(cpu, level);
398}
399
400static void sun4d_clear_ipi(int cpu, int level)
401{
402}
403
404static void sun4d_set_udt(int cpu)
405{
406}
407
408
409void __init sun4d_distribute_irqs(void)
410{
411#ifdef DISTRIBUTE_IRQS
412 struct sbus_bus *sbus;
413 unsigned long sbus_serving_map;
414
415 sbus_serving_map = cpu_present_map;
416 for_each_sbus(sbus) {
417 if ((sbus->board * 2) == boot_cpu_id && (cpu_present_map & (1 << (sbus->board * 2 + 1))))
418 sbus_tid[sbus->board] = (sbus->board * 2 + 1);
419 else if (cpu_present_map & (1 << (sbus->board * 2)))
420 sbus_tid[sbus->board] = (sbus->board * 2);
421 else if (cpu_present_map & (1 << (sbus->board * 2 + 1)))
422 sbus_tid[sbus->board] = (sbus->board * 2 + 1);
423 else
424 sbus_tid[sbus->board] = 0xff;
425 if (sbus_tid[sbus->board] != 0xff)
426 sbus_serving_map &= ~(1 << sbus_tid[sbus->board]);
427 }
428 for_each_sbus(sbus)
429 if (sbus_tid[sbus->board] == 0xff) {
430 int i = 31;
431
432 if (!sbus_serving_map)
433 sbus_serving_map = cpu_present_map;
434 while (!(sbus_serving_map & (1 << i)))
435 i--;
436 sbus_tid[sbus->board] = i;
437 sbus_serving_map &= ~(1 << i);
438 }
439 for_each_sbus(sbus) {
440 printk("sbus%d IRQs directed to CPU%d\n", sbus->board, sbus_tid[sbus->board]);
441 set_sbi_tid(sbus->devid, sbus_tid[sbus->board] << 3);
442 }
443#else
444 struct sbus_bus *sbus;
445 int cpuid = cpu_logical_map(1);
446
447 if (cpuid == -1)
448 cpuid = cpu_logical_map(0);
449 for_each_sbus(sbus) {
450 sbus_tid[sbus->board] = cpuid;
451 set_sbi_tid(sbus->devid, cpuid << 3);
452 }
453 printk("All sbus IRQs directed to CPU%d\n", cpuid);
454#endif
455}
456#endif
457
458static void sun4d_clear_clock_irq(void)
459{
460 volatile unsigned int clear_intr;
461 clear_intr = sun4d_timers->l10_timer_limit;
462}
463
464static void sun4d_clear_profile_irq(int cpu)
465{
466 bw_get_prof_limit(cpu);
467}
468
469static void sun4d_load_profile_irq(int cpu, unsigned int limit)
470{
471 bw_set_prof_limit(cpu, limit);
472}
473
474static void __init sun4d_init_timers(irq_handler_t counter_fn)
475{
476 int irq;
477 int cpu;
478 struct resource r;
479 int mid;
480
481
482 memset(&r, 0, sizeof(r));
483#ifdef CONFIG_SMP
484 r.start = CSR_BASE(boot_cpu_id)+BW_TIMER_LIMIT;
485#else
486 r.start = CSR_BASE(0)+BW_TIMER_LIMIT;
487#endif
488 r.flags = 0xf;
489 sun4d_timers = (struct sun4d_timer_regs *) sbus_ioremap(&r, 0,
490 PAGE_SIZE, "user timer");
491
492 sun4d_timers->l10_timer_limit = (((1000000/HZ) + 1) << 10);
493 master_l10_counter = &sun4d_timers->l10_cur_count;
494 master_l10_limit = &sun4d_timers->l10_timer_limit;
495
496 irq = request_irq(TIMER_IRQ,
497 counter_fn,
498 (IRQF_DISABLED | SA_STATIC_ALLOC),
499 "timer", NULL);
500 if (irq) {
501 prom_printf("time_init: unable to attach IRQ%d\n",TIMER_IRQ);
502 prom_halt();
503 }
504
505
506
507
508 cpu = 0;
509 while (!cpu_find_by_instance(cpu, NULL, &mid)) {
510 sun4d_load_profile_irq(mid >> 3, 0);
511 cpu++;
512 }
513
514#ifdef CONFIG_SMP
515 {
516 unsigned long flags;
517 extern unsigned long lvl14_save[4];
518 struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];
519 extern unsigned int real_irq_entry[], smp4d_ticker[];
520 extern unsigned int patchme_maybe_smp_msg[];
521
522
523 lvl14_save[2] += smp4d_ticker - real_irq_entry;
524
525
526
527
528
529 local_irq_save(flags);
530 patchme_maybe_smp_msg[0] = 0x01000000;
531 trap_table->inst_one = lvl14_save[0];
532 trap_table->inst_two = lvl14_save[1];
533 trap_table->inst_three = lvl14_save[2];
534 trap_table->inst_four = lvl14_save[3];
535 local_flush_cache_all();
536 local_irq_restore(flags);
537 }
538#endif
539}
540
541void __init sun4d_init_sbi_irq(void)
542{
543 struct sbus_bus *sbus;
544 unsigned mask;
545
546 nsbi = 0;
547 for_each_sbus(sbus)
548 nsbi++;
549 sbus_actions = kzalloc (nsbi * 8 * 4 * sizeof(struct sbus_action), GFP_ATOMIC);
550 if (!sbus_actions) {
551 prom_printf("SUN4D: Cannot allocate sbus_actions, halting.\n");
552 prom_halt();
553 }
554 for_each_sbus(sbus) {
555#ifdef CONFIG_SMP
556 extern unsigned char boot_cpu_id;
557
558 set_sbi_tid(sbus->devid, boot_cpu_id << 3);
559 sbus_tid[sbus->board] = boot_cpu_id;
560#endif
561
562 mask = acquire_sbi(sbus->devid, 0xffffffff);
563 if (mask) {
564 printk ("Clearing pending IRQs %08x on SBI %d\n", mask, sbus->board);
565 release_sbi(sbus->devid, mask);
566 }
567 }
568}
569
570void __init sun4d_init_IRQ(void)
571{
572 local_irq_disable();
573
574 BTFIXUPSET_CALL(sbint_to_irq, sun4d_sbint_to_irq, BTFIXUPCALL_NORM);
575 BTFIXUPSET_CALL(enable_irq, sun4d_enable_irq, BTFIXUPCALL_NORM);
576 BTFIXUPSET_CALL(disable_irq, sun4d_disable_irq, BTFIXUPCALL_NORM);
577 BTFIXUPSET_CALL(clear_clock_irq, sun4d_clear_clock_irq, BTFIXUPCALL_NORM);
578 BTFIXUPSET_CALL(clear_profile_irq, sun4d_clear_profile_irq, BTFIXUPCALL_NORM);
579 BTFIXUPSET_CALL(load_profile_irq, sun4d_load_profile_irq, BTFIXUPCALL_NORM);
580 sparc_init_timers = sun4d_init_timers;
581#ifdef CONFIG_SMP
582 BTFIXUPSET_CALL(set_cpu_int, sun4d_set_cpu_int, BTFIXUPCALL_NORM);
583 BTFIXUPSET_CALL(clear_cpu_int, sun4d_clear_ipi, BTFIXUPCALL_NOP);
584 BTFIXUPSET_CALL(set_irq_udt, sun4d_set_udt, BTFIXUPCALL_NOP);
585#endif
586
587}
588
