File: /usr/src/linux/arch/m68k/atari/ataints.c
1 /*
2 * arch/m68k/atari/ataints.c -- Atari Linux interrupt handling code
3 *
4 * 5/2/94 Roman Hodek:
5 * Added support for TT interrupts; setup for TT SCU (may someone has
6 * twiddled there and we won't get the right interrupts :-()
7 *
8 * Major change: The device-independent code in m68k/ints.c didn't know
9 * about non-autovec ints yet. It hardcoded the number of possible ints to
10 * 7 (IRQ1...IRQ7). But the Atari has lots of non-autovec ints! I made the
11 * number of possible ints a constant defined in interrupt.h, which is
12 * 47 for the Atari. So we can call request_irq() for all Atari interrupts
13 * just the normal way. Additionally, all vectors >= 48 are initialized to
14 * call trap() instead of inthandler(). This must be changed here, too.
15 *
16 * 1995-07-16 Lars Brinkhoff <f93labr@dd.chalmers.se>:
17 * Corrected a bug in atari_add_isr() which rejected all SCC
18 * interrupt sources if there were no TT MFP!
19 *
20 * 12/13/95: New interface functions atari_level_triggered_int() and
21 * atari_register_vme_int() as support for level triggered VME interrupts.
22 *
23 * 02/12/96: (Roman)
24 * Total rewrite of Atari interrupt handling, for new scheme see comments
25 * below.
26 *
27 * 1996-09-03 lars brinkhoff <f93labr@dd.chalmers.se>:
28 * Added new function atari_unregister_vme_int(), and
29 * modified atari_register_vme_int() as well as IS_VALID_INTNO()
30 * to work with it.
31 *
32 * This file is subject to the terms and conditions of the GNU General Public
33 * License. See the file COPYING in the main directory of this archive
34 * for more details.
35 *
36 */
37
38 #include <linux/types.h>
39 #include <linux/kernel.h>
40 #include <linux/ptrace.h>
41 #include <linux/kernel_stat.h>
42 #include <linux/init.h>
43
44 #include <asm/system.h>
45 #include <asm/traps.h>
46
47 #include <asm/atarihw.h>
48 #include <asm/atariints.h>
49 #include <asm/atari_stdma.h>
50 #include <asm/irq.h>
51 #include <asm/entry.h>
52
53
54 /*
55 * Atari interrupt handling scheme:
56 * --------------------------------
57 *
58 * All interrupt source have an internal number (defined in
59 * <asm/atariints.h>): Autovector interrupts are 1..7, then follow ST-MFP,
60 * TT-MFP, SCC, and finally VME interrupts. Vector numbers for the latter can
61 * be allocated by atari_register_vme_int().
62 *
63 * Each interrupt can be of three types:
64 *
65 * - SLOW: The handler runs with all interrupts enabled, except the one it
66 * was called by (to avoid reentering). This should be the usual method.
67 * But it is currently possible only for MFP ints, since only the MFP
68 * offers an easy way to mask interrupts.
69 *
70 * - FAST: The handler runs with all interrupts disabled. This should be used
71 * only for really fast handlers, that just do actions immediately
72 * necessary, and let the rest do a bottom half or task queue.
73 *
74 * - PRIORITIZED: The handler can be interrupted by higher-level ints
75 * (greater IPL, no MFP priorities!). This is the method of choice for ints
76 * which should be slow, but are not from a MFP.
77 *
78 * The feature of more than one handler for one int source is still there, but
79 * only applicable if all handers are of the same type. To not slow down
80 * processing of ints with only one handler by the chaining feature, the list
81 * calling function atari_call_irq_list() is only plugged in at the time the
82 * second handler is registered.
83 *
84 * Implementation notes: For fast-as-possible int handling, there are separate
85 * entry points for each type (slow/fast/prio). The assembler handler calls
86 * the irq directly in the usual case, no C wrapper is involved. In case of
87 * multiple handlers, atari_call_irq_list() is registered as handler and calls
88 * in turn the real irq's. To ease access from assembler level to the irq
89 * function pointer and accompanying data, these two are stored in a separate
90 * array, irq_handler[]. The rest of data (type, name) are put into a second
91 * array, irq_param, that is accessed from C only. For each slow interrupt (32
92 * in all) there are separate handler functions, which makes it possible to
93 * hard-code the MFP register address and value, are necessary to mask the
94 * int. If there'd be only one generic function, lots of calculations would be
95 * needed to determine MFP register and int mask from the vector number :-(
96 *
97 * Furthermore, slow ints may not lower the IPL below its previous value
98 * (before the int happened). This is needed so that an int of class PRIO, on
99 * that this int may be stacked, cannot be reentered. This feature is
100 * implemented as follows: If the stack frame format is 1 (throwaway), the int
101 * is not stacked, and the IPL is anded with 0xfbff, resulting in a new level
102 * 2, which still blocks the HSYNC, but no interrupts of interest. If the
103 * frame format is 0, the int is nested, and the old IPL value can be found in
104 * the sr copy in the frame.
105 */
106
107
108 #define NUM_INT_SOURCES (8 + NUM_ATARI_SOURCES)
109
110 typedef void (*asm_irq_handler)(void);
111
112 struct irqhandler {
113 void (*handler)(int, void *, struct pt_regs *);
114 void *dev_id;
115 };
116
117 struct irqparam {
118 unsigned long flags;
119 const char *devname;
120 };
121
122 /*
123 * Array with irq's and their parameter data. This array is accessed from low
124 * level assembler code, so an element size of 8 allows usage of index scaling
125 * addressing mode.
126 */
127 static struct irqhandler irq_handler[NUM_INT_SOURCES];
128
129 /*
130 * This array hold the rest of parameters of int handlers: type
131 * (slow,fast,prio) and the name of the handler. These values are only
132 * accessed from C
133 */
134 static struct irqparam irq_param[NUM_INT_SOURCES];
135
136 /*
137 * Bitmap for free interrupt vector numbers
138 * (new vectors starting from 0x70 can be allocated by
139 * atari_register_vme_int())
140 */
141 static int free_vme_vec_bitmap = 0;
142
143 /* check for valid int number (complex, sigh...) */
144 #define IS_VALID_INTNO(n) \
145 ((n) > 0 && \
146 /* autovec and ST-MFP ok anyway */ \
147 (((n) < TTMFP_SOURCE_BASE) || \
148 /* TT-MFP ok if present */ \
149 ((n) >= TTMFP_SOURCE_BASE && (n) < SCC_SOURCE_BASE && \
150 ATARIHW_PRESENT(TT_MFP)) || \
151 /* SCC ok if present and number even */ \
152 ((n) >= SCC_SOURCE_BASE && (n) < VME_SOURCE_BASE && \
153 !((n) & 1) && ATARIHW_PRESENT(SCC)) || \
154 /* greater numbers ok if they are registered VME vectors */ \
155 ((n) >= VME_SOURCE_BASE && (n) < VME_SOURCE_BASE + VME_MAX_SOURCES && \
156 free_vme_vec_bitmap & (1 << ((n) - VME_SOURCE_BASE)))))
157
158
159 /*
160 * Here start the assembler entry points for interrupts
161 */
162
163 #define IRQ_NAME(nr) atari_slow_irq_##nr##_handler(void)
164
165 #define BUILD_SLOW_IRQ(n) \
166 asmlinkage void IRQ_NAME(n); \
167 /* Dummy function to allow asm with operands. */ \
168 void atari_slow_irq_##n##_dummy (void) { \
169 __asm__ (__ALIGN_STR "\n" \
170 SYMBOL_NAME_STR(atari_slow_irq_) #n "_handler:\t" \
171 " addql #1,"SYMBOL_NAME_STR(irq_stat)"+8\n" /* local_irq_count */ \
172 SAVE_ALL_INT "\n" \
173 GET_CURRENT(%%d0) "\n" \
174 " andb #~(1<<(%c3&7)),%a4:w\n" /* mask this interrupt */ \
175 /* get old IPL from stack frame */ \
176 " bfextu %%sp@(%c2){#5,#3},%%d0\n" \
177 " movew %%sr,%%d1\n" \
178 " bfins %%d0,%%d1{#21,#3}\n" \
179 " movew %%d1,%%sr\n" /* set IPL = previous value */ \
180 " addql #1,%a0\n" \
181 " lea %a1,%%a0\n" \
182 " pea %%sp@\n" /* push addr of frame */ \
183 " movel %%a0@(4),%%sp@-\n" /* push handler data */ \
184 " pea (%c3+8)\n" /* push int number */ \
185 " movel %%a0@,%%a0\n" \
186 " jbsr %%a0@\n" /* call the handler */ \
187 " addql #8,%%sp\n" \
188 " addql #4,%%sp\n" \
189 " orw #0x0600,%%sr\n" \
190 " andw #0xfeff,%%sr\n" /* set IPL = 6 again */ \
191 " orb #(1<<(%c3&7)),%a4:w\n" /* now unmask the int again */ \
192 " jbra "SYMBOL_NAME_STR(ret_from_interrupt)"\n" \
193 : : "i" (&kstat.irqs[0][n+8]), "i" (&irq_handler[n+8]), \
194 "n" (PT_OFF_SR), "n" (n), \
195 "i" (n & 8 ? (n & 16 ? &tt_mfp.int_mk_a : &mfp.int_mk_a) \
196 : (n & 16 ? &tt_mfp.int_mk_b : &mfp.int_mk_b)) \
197 ); \
198 }
199
200 BUILD_SLOW_IRQ(0);
201 BUILD_SLOW_IRQ(1);
202 BUILD_SLOW_IRQ(2);
203 BUILD_SLOW_IRQ(3);
204 BUILD_SLOW_IRQ(4);
205 BUILD_SLOW_IRQ(5);
206 BUILD_SLOW_IRQ(6);
207 BUILD_SLOW_IRQ(7);
208 BUILD_SLOW_IRQ(8);
209 BUILD_SLOW_IRQ(9);
210 BUILD_SLOW_IRQ(10);
211 BUILD_SLOW_IRQ(11);
212 BUILD_SLOW_IRQ(12);
213 BUILD_SLOW_IRQ(13);
214 BUILD_SLOW_IRQ(14);
215 BUILD_SLOW_IRQ(15);
216 BUILD_SLOW_IRQ(16);
217 BUILD_SLOW_IRQ(17);
218 BUILD_SLOW_IRQ(18);
219 BUILD_SLOW_IRQ(19);
220 BUILD_SLOW_IRQ(20);
221 BUILD_SLOW_IRQ(21);
222 BUILD_SLOW_IRQ(22);
223 BUILD_SLOW_IRQ(23);
224 BUILD_SLOW_IRQ(24);
225 BUILD_SLOW_IRQ(25);
226 BUILD_SLOW_IRQ(26);
227 BUILD_SLOW_IRQ(27);
228 BUILD_SLOW_IRQ(28);
229 BUILD_SLOW_IRQ(29);
230 BUILD_SLOW_IRQ(30);
231 BUILD_SLOW_IRQ(31);
232
233 asm_irq_handler slow_handlers[32] = {
234 atari_slow_irq_0_handler,
235 atari_slow_irq_1_handler,
236 atari_slow_irq_2_handler,
237 atari_slow_irq_3_handler,
238 atari_slow_irq_4_handler,
239 atari_slow_irq_5_handler,
240 atari_slow_irq_6_handler,
241 atari_slow_irq_7_handler,
242 atari_slow_irq_8_handler,
243 atari_slow_irq_9_handler,
244 atari_slow_irq_10_handler,
245 atari_slow_irq_11_handler,
246 atari_slow_irq_12_handler,
247 atari_slow_irq_13_handler,
248 atari_slow_irq_14_handler,
249 atari_slow_irq_15_handler,
250 atari_slow_irq_16_handler,
251 atari_slow_irq_17_handler,
252 atari_slow_irq_18_handler,
253 atari_slow_irq_19_handler,
254 atari_slow_irq_20_handler,
255 atari_slow_irq_21_handler,
256 atari_slow_irq_22_handler,
257 atari_slow_irq_23_handler,
258 atari_slow_irq_24_handler,
259 atari_slow_irq_25_handler,
260 atari_slow_irq_26_handler,
261 atari_slow_irq_27_handler,
262 atari_slow_irq_28_handler,
263 atari_slow_irq_29_handler,
264 atari_slow_irq_30_handler,
265 atari_slow_irq_31_handler
266 };
267
268 asmlinkage void atari_fast_irq_handler( void );
269 asmlinkage void atari_prio_irq_handler( void );
270
271 /* Dummy function to allow asm with operands. */
272 void atari_fast_prio_irq_dummy (void) {
273 __asm__ (__ALIGN_STR "\n"
274 SYMBOL_NAME_STR(atari_fast_irq_handler) ":
275 orw #0x700,%%sr /* disable all interrupts */
276 "SYMBOL_NAME_STR(atari_prio_irq_handler) ":\t
277 addql #1,"SYMBOL_NAME_STR(irq_stat)"+8\n" /* local_irq_count */
278 SAVE_ALL_INT "\n"
279 GET_CURRENT(%%d0) "
280 /* get vector number from stack frame and convert to source */
281 bfextu %%sp@(%c1){#4,#10},%%d0
282 subw #(0x40-8),%%d0
283 jpl 1f
284 addw #(0x40-8-0x18),%%d0
285 1: lea %a0,%%a0
286 addql #1,%%a0@(%%d0:l:4)
287 lea "SYMBOL_NAME_STR(irq_handler)",%%a0
288 lea %%a0@(%%d0:l:8),%%a0
289 pea %%sp@ /* push frame address */
290 movel %%a0@(4),%%sp@- /* push handler data */
291 movel %%d0,%%sp@- /* push int number */
292 movel %%a0@,%%a0
293 jsr %%a0@ /* and call the handler */
294 addql #8,%%sp
295 addql #4,%%sp
296 jbra "SYMBOL_NAME_STR(ret_from_interrupt)
297 : : "i" (&kstat.irqs[0]), "n" (PT_OFF_FORMATVEC)
298 );
299 }
300
301 /* GK:
302 * HBL IRQ handler for Falcon. Nobody needs it :-)
303 * ++andreas: raise ipl to disable further HBLANK interrupts.
304 */
305 asmlinkage void falcon_hblhandler(void);
306 asm(".text\n"
307 __ALIGN_STR "\n"
308 SYMBOL_NAME_STR(falcon_hblhandler) ":
309 orw #0x200,%sp@ /* set saved ipl to 2 */
310 rte");
311
312 /* Defined in entry.S; only increments 'num_spurious' */
313 asmlinkage void bad_interrupt(void);
314
315 extern void atari_microwire_cmd( int cmd );
316
317 extern int atari_SCC_reset_done;
318
319 /*
320 * void atari_init_IRQ (void)
321 *
322 * Parameters: None
323 *
324 * Returns: Nothing
325 *
326 * This function should be called during kernel startup to initialize
327 * the atari IRQ handling routines.
328 */
329
330 void __init atari_init_IRQ(void)
331 {
332 int i;
333
334 /* initialize the vector table */
335 for (i = 0; i < NUM_INT_SOURCES; ++i) {
336 vectors[IRQ_SOURCE_TO_VECTOR(i)] = bad_interrupt;
337 }
338
339 /* Initialize the MFP(s) */
340
341 #ifdef ATARI_USE_SOFTWARE_EOI
342 mfp.vec_adr = 0x48; /* Software EOI-Mode */
343 #else
344 mfp.vec_adr = 0x40; /* Automatic EOI-Mode */
345 #endif
346 mfp.int_en_a = 0x00; /* turn off MFP-Ints */
347 mfp.int_en_b = 0x00;
348 mfp.int_mk_a = 0xff; /* no Masking */
349 mfp.int_mk_b = 0xff;
350
351 if (ATARIHW_PRESENT(TT_MFP)) {
352 #ifdef ATARI_USE_SOFTWARE_EOI
353 tt_mfp.vec_adr = 0x58; /* Software EOI-Mode */
354 #else
355 tt_mfp.vec_adr = 0x50; /* Automatic EOI-Mode */
356 #endif
357 tt_mfp.int_en_a = 0x00; /* turn off MFP-Ints */
358 tt_mfp.int_en_b = 0x00;
359 tt_mfp.int_mk_a = 0xff; /* no Masking */
360 tt_mfp.int_mk_b = 0xff;
361 }
362
363 if (ATARIHW_PRESENT(SCC) && !atari_SCC_reset_done) {
364 scc.cha_a_ctrl = 9;
365 MFPDELAY();
366 scc.cha_a_ctrl = (char) 0xc0; /* hardware reset */
367 }
368
369 if (ATARIHW_PRESENT(SCU)) {
370 /* init the SCU if present */
371 tt_scu.sys_mask = 0x10; /* enable VBL (for the cursor) and
372 * disable HSYNC interrupts (who
373 * needs them?) MFP and SCC are
374 * enabled in VME mask
375 */
376 tt_scu.vme_mask = 0x60; /* enable MFP and SCC ints */
377 }
378 else {
379 /* If no SCU and no Hades, the HSYNC interrupt needs to be
380 * disabled this way. (Else _inthandler in kernel/sys_call.S
381 * gets overruns)
382 */
383
384 if (!MACH_IS_HADES)
385 vectors[VEC_INT2] = falcon_hblhandler;
386 }
387
388 if (ATARIHW_PRESENT(PCM_8BIT) && ATARIHW_PRESENT(MICROWIRE)) {
389 /* Initialize the LM1992 Sound Controller to enable
390 the PSG sound. This is misplaced here, it should
391 be in an atasound_init(), that doesn't exist yet. */
392 atari_microwire_cmd(MW_LM1992_PSG_HIGH);
393 }
394
395 stdma_init();
396
397 /* Initialize the PSG: all sounds off, both ports output */
398 sound_ym.rd_data_reg_sel = 7;
399 sound_ym.wd_data = 0xff;
400 }
401
402
403 static void atari_call_irq_list( int irq, void *dev_id, struct pt_regs *fp )
404 {
405 irq_node_t *node;
406
407 for (node = (irq_node_t *)dev_id; node; node = node->next)
408 node->handler(irq, node->dev_id, fp);
409 }
410
411
412 /*
413 * atari_request_irq : add an interrupt service routine for a particular
414 * machine specific interrupt source.
415 * If the addition was successful, it returns 0.
416 */
417
418 int atari_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
419 unsigned long flags, const char *devname, void *dev_id)
420 {
421 int vector;
422 unsigned long oflags = flags;
423
424 /*
425 * The following is a hack to make some PCI card drivers work,
426 * which set the SA_SHIRQ flag.
427 */
428
429 flags &= ~SA_SHIRQ;
430
431 if (flags == SA_INTERRUPT) {
432 printk ("%s: SA_INTERRUPT changed to IRQ_TYPE_SLOW for %s\n",
433 __FUNCTION__, devname);
434 flags = IRQ_TYPE_SLOW;
435 }
436 if (flags < IRQ_TYPE_SLOW || flags > IRQ_TYPE_PRIO) {
437 printk ("%s: Bad irq type 0x%lx <0x%lx> requested from %s\n",
438 __FUNCTION__, flags, oflags, devname);
439 return -EINVAL;
440 }
441 if (!IS_VALID_INTNO(irq)) {
442 printk ("%s: Unknown irq %d requested from %s\n",
443 __FUNCTION__, irq, devname);
444 return -ENXIO;
445 }
446 vector = IRQ_SOURCE_TO_VECTOR(irq);
447
448 /*
449 * Check type/source combination: slow ints are (currently)
450 * only possible for MFP-interrupts.
451 */
452 if (flags == IRQ_TYPE_SLOW &&
453 (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE)) {
454 printk ("%s: Slow irq requested for non-MFP source %d from %s\n",
455 __FUNCTION__, irq, devname);
456 return -EINVAL;
457 }
458
459 if (vectors[vector] == bad_interrupt) {
460 /* int has no handler yet */
461 irq_handler[irq].handler = handler;
462 irq_handler[irq].dev_id = dev_id;
463 irq_param[irq].flags = flags;
464 irq_param[irq].devname = devname;
465 vectors[vector] =
466 (flags == IRQ_TYPE_SLOW) ? slow_handlers[irq-STMFP_SOURCE_BASE] :
467 (flags == IRQ_TYPE_FAST) ? atari_fast_irq_handler :
468 atari_prio_irq_handler;
469 /* If MFP int, also enable and umask it */
470 atari_turnon_irq(irq);
471 atari_enable_irq(irq);
472
473 return 0;
474 }
475 else if (irq_param[irq].flags == flags) {
476 /* old handler is of same type -> handlers can be chained */
477 irq_node_t *node;
478 unsigned long flags;
479
480 save_flags(flags);
481 cli();
482
483 if (irq_handler[irq].handler != atari_call_irq_list) {
484 /* Only one handler yet, make a node for this first one */
485 if (!(node = new_irq_node()))
486 return -ENOMEM;
487 node->handler = irq_handler[irq].handler;
488 node->dev_id = irq_handler[irq].dev_id;
489 node->devname = irq_param[irq].devname;
490 node->next = NULL;
491
492 irq_handler[irq].handler = atari_call_irq_list;
493 irq_handler[irq].dev_id = node;
494 irq_param[irq].devname = "chained";
495 }
496
497 if (!(node = new_irq_node()))
498 return -ENOMEM;
499 node->handler = handler;
500 node->dev_id = dev_id;
501 node->devname = devname;
502 /* new handlers are put in front of the queue */
503 node->next = irq_handler[irq].dev_id;
504 irq_handler[irq].dev_id = node;
505
506 restore_flags(flags);
507 return 0;
508 } else {
509 printk ("%s: Irq %d allocated by other type int (call from %s)\n",
510 __FUNCTION__, irq, devname);
511 return -EBUSY;
512 }
513 }
514
515 void atari_free_irq(unsigned int irq, void *dev_id)
516 {
517 unsigned long flags;
518 int vector;
519 irq_node_t **list, *node;
520
521 if (!IS_VALID_INTNO(irq)) {
522 printk("%s: Unknown irq %d\n", __FUNCTION__, irq);
523 return;
524 }
525
526 vector = IRQ_SOURCE_TO_VECTOR(irq);
527 if (vectors[vector] == bad_interrupt)
528 goto not_found;
529
530 save_flags(flags);
531 cli();
532
533 if (irq_handler[irq].handler != atari_call_irq_list) {
534 /* It's the only handler for the interrupt */
535 if (irq_handler[irq].dev_id != dev_id) {
536 restore_flags(flags);
537 goto not_found;
538 }
539 irq_handler[irq].handler = NULL;
540 irq_handler[irq].dev_id = NULL;
541 irq_param[irq].devname = NULL;
542 vectors[vector] = bad_interrupt;
543 /* If MFP int, also disable it */
544 atari_disable_irq(irq);
545 atari_turnoff_irq(irq);
546
547 restore_flags(flags);
548 return;
549 }
550
551 /* The interrupt is chained, find the irq on the list */
552 for(list = (irq_node_t **)&irq_handler[irq].dev_id; *list; list = &(*list)->next) {
553 if ((*list)->dev_id == dev_id) break;
554 }
555 if (!*list) {
556 restore_flags(flags);
557 goto not_found;
558 }
559
560 (*list)->handler = NULL; /* Mark it as free for reallocation */
561 *list = (*list)->next;
562
563 /* If there's now only one handler, unchain the interrupt, i.e. plug in
564 * the handler directly again and omit atari_call_irq_list */
565 node = (irq_node_t *)irq_handler[irq].dev_id;
566 if (node && !node->next) {
567 irq_handler[irq].handler = node->handler;
568 irq_handler[irq].dev_id = node->dev_id;
569 irq_param[irq].devname = node->devname;
570 node->handler = NULL; /* Mark it as free for reallocation */
571 }
572
573 restore_flags(flags);
574 return;
575
576 not_found:
577 printk("%s: tried to remove invalid irq\n", __FUNCTION__);
578 return;
579 }
580
581
582 /*
583 * atari_register_vme_int() returns the number of a free interrupt vector for
584 * hardware with a programmable int vector (probably a VME board).
585 */
586
587 unsigned long atari_register_vme_int(void)
588 {
589 int i;
590
591 for(i = 0; i < 32; i++)
592 if((free_vme_vec_bitmap & (1 << i)) == 0)
593 break;
594
595 if(i == 16)
596 return 0;
597
598 free_vme_vec_bitmap |= 1 << i;
599 return (VME_SOURCE_BASE + i);
600 }
601
602
603 void atari_unregister_vme_int(unsigned long irq)
604 {
605 if(irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) {
606 irq -= VME_SOURCE_BASE;
607 free_vme_vec_bitmap &= ~(1 << irq);
608 }
609 }
610
611
612 int atari_get_irq_list(char *buf)
613 {
614 int i, len = 0;
615
616 for (i = 0; i < NUM_INT_SOURCES; ++i) {
617 if (vectors[IRQ_SOURCE_TO_VECTOR(i)] == bad_interrupt)
618 continue;
619 if (i < STMFP_SOURCE_BASE)
620 len += sprintf(buf+len, "auto %2d: %10u ",
621 i, kstat.irqs[0][i]);
622 else
623 len += sprintf(buf+len, "vec $%02x: %10u ",
624 IRQ_SOURCE_TO_VECTOR(i),
625 kstat.irqs[0][i]);
626
627 if (irq_handler[i].handler != atari_call_irq_list) {
628 len += sprintf(buf+len, "%s\n", irq_param[i].devname);
629 }
630 else {
631 irq_node_t *p;
632 for( p = (irq_node_t *)irq_handler[i].dev_id; p; p = p->next ) {
633 len += sprintf(buf+len, "%s\n", p->devname);
634 if (p->next)
635 len += sprintf( buf+len, " " );
636 }
637 }
638 }
639 if (num_spurious)
640 len += sprintf(buf+len, "spurio.: %10u\n", num_spurious);
641
642 return len;
643 }
644
645
646