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linux-user: Allow targets to specify a minimum uname release
[qemu.git] / hw / intc / omap_intc.c
blob7dd63da802920cb0e4a1796f4bfd4d9c86a99393
1 /*
2 * TI OMAP interrupt controller emulation.
3 *
4 * Copyright (C) 2006-2008 Andrzej Zaborowski <balrog@zabor.org>
5 * Copyright (C) 2007-2008 Nokia Corporation
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 or
10 * (at your option) version 3 of the License.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, see <http://www.gnu.org/licenses/>.
19 */
20 #include "hw/hw.h"
21 #include "hw/arm/omap.h"
22 #include "hw/sysbus.h"
23
24 /* Interrupt Handlers */
25 struct omap_intr_handler_bank_s {
26 uint32_t irqs;
27 uint32_t inputs;
28 uint32_t mask;
29 uint32_t fiq;
30 uint32_t sens_edge;
31 uint32_t swi;
32 unsigned char priority[32];
33 };
34
35 #define TYPE_OMAP_INTC "common-omap-intc"
36 #define OMAP_INTC(obj) \
37 OBJECT_CHECK(struct omap_intr_handler_s, (obj), TYPE_OMAP_INTC)
38
39 struct omap_intr_handler_s {
40 SysBusDevice parent_obj;
41
42 qemu_irq *pins;
43 qemu_irq parent_intr[2];
44 MemoryRegion mmio;
45 void *iclk;
46 void *fclk;
47 unsigned char nbanks;
48 int level_only;
49 uint32_t size;
50
51 uint8_t revision;
52
53 /* state */
54 uint32_t new_agr[2];
55 int sir_intr[2];
56 int autoidle;
57 uint32_t mask;
58 struct omap_intr_handler_bank_s bank[3];
59 };
60
61 static void omap_inth_sir_update(struct omap_intr_handler_s *s, int is_fiq)
62 {
63 int i, j, sir_intr, p_intr, p, f;
64 uint32_t level;
65 sir_intr = 0;
66 p_intr = 255;
67
68 /* Find the interrupt line with the highest dynamic priority.
69 * Note: 0 denotes the hightest priority.
70 * If all interrupts have the same priority, the default order is IRQ_N,
71 * IRQ_N-1,...,IRQ_0. */
72 for (j = 0; j < s->nbanks; ++j) {
73 level = s->bank[j].irqs & ~s->bank[j].mask &
74 (is_fiq ? s->bank[j].fiq : ~s->bank[j].fiq);
75 for (f = ffs(level), i = f - 1, level >>= f - 1; f; i += f,
76 level >>= f) {
77 p = s->bank[j].priority[i];
78 if (p <= p_intr) {
79 p_intr = p;
80 sir_intr = 32 * j + i;
81 }
82 f = ffs(level >> 1);
83 }
84 }
85 s->sir_intr[is_fiq] = sir_intr;
86 }
87
88 static inline void omap_inth_update(struct omap_intr_handler_s *s, int is_fiq)
89 {
90 int i;
91 uint32_t has_intr = 0;
92
93 for (i = 0; i < s->nbanks; ++i)
94 has_intr |= s->bank[i].irqs & ~s->bank[i].mask &
95 (is_fiq ? s->bank[i].fiq : ~s->bank[i].fiq);
96
97 if (s->new_agr[is_fiq] & has_intr & s->mask) {
98 s->new_agr[is_fiq] = 0;
99 omap_inth_sir_update(s, is_fiq);
100 qemu_set_irq(s->parent_intr[is_fiq], 1);
101 }
102 }
103
104 #define INT_FALLING_EDGE 0
105 #define INT_LOW_LEVEL 1
106
107 static void omap_set_intr(void *opaque, int irq, int req)
108 {
109 struct omap_intr_handler_s *ih = (struct omap_intr_handler_s *) opaque;
110 uint32_t rise;
111
112 struct omap_intr_handler_bank_s *bank = &ih->bank[irq >> 5];
113 int n = irq & 31;
114
115 if (req) {
116 rise = ~bank->irqs & (1 << n);
117 if (~bank->sens_edge & (1 << n))
118 rise &= ~bank->inputs;
119
120 bank->inputs |= (1 << n);
121 if (rise) {
122 bank->irqs |= rise;
123 omap_inth_update(ih, 0);
124 omap_inth_update(ih, 1);
125 }
126 } else {
127 rise = bank->sens_edge & bank->irqs & (1 << n);
128 bank->irqs &= ~rise;
129 bank->inputs &= ~(1 << n);
130 }
131 }
132
133 /* Simplified version with no edge detection */
134 static void omap_set_intr_noedge(void *opaque, int irq, int req)
135 {
136 struct omap_intr_handler_s *ih = (struct omap_intr_handler_s *) opaque;
137 uint32_t rise;
138
139 struct omap_intr_handler_bank_s *bank = &ih->bank[irq >> 5];
140 int n = irq & 31;
141
142 if (req) {
143 rise = ~bank->inputs & (1 << n);
144 if (rise) {
145 bank->irqs |= bank->inputs |= rise;
146 omap_inth_update(ih, 0);
147 omap_inth_update(ih, 1);
148 }
149 } else
150 bank->irqs = (bank->inputs &= ~(1 << n)) | bank->swi;
151 }
152
153 static uint64_t omap_inth_read(void *opaque, hwaddr addr,
154 unsigned size)
155 {
156 struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
157 int i, offset = addr;
158 int bank_no = offset >> 8;
159 int line_no;
160 struct omap_intr_handler_bank_s *bank = &s->bank[bank_no];
161 offset &= 0xff;
162
163 switch (offset) {
164 case 0x00: /* ITR */
165 return bank->irqs;
166
167 case 0x04: /* MIR */
168 return bank->mask;
169
170 case 0x10: /* SIR_IRQ_CODE */
171 case 0x14: /* SIR_FIQ_CODE */
172 if (bank_no != 0)
173 break;
174 line_no = s->sir_intr[(offset - 0x10) >> 2];
175 bank = &s->bank[line_no >> 5];
176 i = line_no & 31;
177 if (((bank->sens_edge >> i) & 1) == INT_FALLING_EDGE)
178 bank->irqs &= ~(1 << i);
179 return line_no;
180
181 case 0x18: /* CONTROL_REG */
182 if (bank_no != 0)
183 break;
184 return 0;
185
186 case 0x1c: /* ILR0 */
187 case 0x20: /* ILR1 */
188 case 0x24: /* ILR2 */
189 case 0x28: /* ILR3 */
190 case 0x2c: /* ILR4 */
191 case 0x30: /* ILR5 */
192 case 0x34: /* ILR6 */
193 case 0x38: /* ILR7 */
194 case 0x3c: /* ILR8 */
195 case 0x40: /* ILR9 */
196 case 0x44: /* ILR10 */
197 case 0x48: /* ILR11 */
198 case 0x4c: /* ILR12 */
199 case 0x50: /* ILR13 */
200 case 0x54: /* ILR14 */
201 case 0x58: /* ILR15 */
202 case 0x5c: /* ILR16 */
203 case 0x60: /* ILR17 */
204 case 0x64: /* ILR18 */
205 case 0x68: /* ILR19 */
206 case 0x6c: /* ILR20 */
207 case 0x70: /* ILR21 */
208 case 0x74: /* ILR22 */
209 case 0x78: /* ILR23 */
210 case 0x7c: /* ILR24 */
211 case 0x80: /* ILR25 */
212 case 0x84: /* ILR26 */
213 case 0x88: /* ILR27 */
214 case 0x8c: /* ILR28 */
215 case 0x90: /* ILR29 */
216 case 0x94: /* ILR30 */
217 case 0x98: /* ILR31 */
218 i = (offset - 0x1c) >> 2;
219 return (bank->priority[i] << 2) |
220 (((bank->sens_edge >> i) & 1) << 1) |
221 ((bank->fiq >> i) & 1);
222
223 case 0x9c: /* ISR */
224 return 0x00000000;
225
226 }
227 OMAP_BAD_REG(addr);
228 return 0;
229 }
230
231 static void omap_inth_write(void *opaque, hwaddr addr,
232 uint64_t value, unsigned size)
233 {
234 struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
235 int i, offset = addr;
236 int bank_no = offset >> 8;
237 struct omap_intr_handler_bank_s *bank = &s->bank[bank_no];
238 offset &= 0xff;
239
240 switch (offset) {
241 case 0x00: /* ITR */
242 /* Important: ignore the clearing if the IRQ is level-triggered and
243 the input bit is 1 */
244 bank->irqs &= value | (bank->inputs & bank->sens_edge);
245 return;
246
247 case 0x04: /* MIR */
248 bank->mask = value;
249 omap_inth_update(s, 0);
250 omap_inth_update(s, 1);
251 return;
252
253 case 0x10: /* SIR_IRQ_CODE */
254 case 0x14: /* SIR_FIQ_CODE */
255 OMAP_RO_REG(addr);
256 break;
257
258 case 0x18: /* CONTROL_REG */
259 if (bank_no != 0)
260 break;
261 if (value & 2) {
262 qemu_set_irq(s->parent_intr[1], 0);
263 s->new_agr[1] = ~0;
264 omap_inth_update(s, 1);
265 }
266 if (value & 1) {
267 qemu_set_irq(s->parent_intr[0], 0);
268 s->new_agr[0] = ~0;
269 omap_inth_update(s, 0);
270 }
271 return;
272
273 case 0x1c: /* ILR0 */
274 case 0x20: /* ILR1 */
275 case 0x24: /* ILR2 */
276 case 0x28: /* ILR3 */
277 case 0x2c: /* ILR4 */
278 case 0x30: /* ILR5 */
279 case 0x34: /* ILR6 */
280 case 0x38: /* ILR7 */
281 case 0x3c: /* ILR8 */
282 case 0x40: /* ILR9 */
283 case 0x44: /* ILR10 */
284 case 0x48: /* ILR11 */
285 case 0x4c: /* ILR12 */
286 case 0x50: /* ILR13 */
287 case 0x54: /* ILR14 */
288 case 0x58: /* ILR15 */
289 case 0x5c: /* ILR16 */
290 case 0x60: /* ILR17 */
291 case 0x64: /* ILR18 */
292 case 0x68: /* ILR19 */
293 case 0x6c: /* ILR20 */
294 case 0x70: /* ILR21 */
295 case 0x74: /* ILR22 */
296 case 0x78: /* ILR23 */
297 case 0x7c: /* ILR24 */
298 case 0x80: /* ILR25 */
299 case 0x84: /* ILR26 */
300 case 0x88: /* ILR27 */
301 case 0x8c: /* ILR28 */
302 case 0x90: /* ILR29 */
303 case 0x94: /* ILR30 */
304 case 0x98: /* ILR31 */
305 i = (offset - 0x1c) >> 2;
306 bank->priority[i] = (value >> 2) & 0x1f;
307 bank->sens_edge &= ~(1 << i);
308 bank->sens_edge |= ((value >> 1) & 1) << i;
309 bank->fiq &= ~(1 << i);
310 bank->fiq |= (value & 1) << i;
311 return;
312
313 case 0x9c: /* ISR */
314 for (i = 0; i < 32; i ++)
315 if (value & (1 << i)) {
316 omap_set_intr(s, 32 * bank_no + i, 1);
317 return;
318 }
319 return;
320 }
321 OMAP_BAD_REG(addr);
322 }
323
324 static const MemoryRegionOps omap_inth_mem_ops = {
325 .read = omap_inth_read,
326 .write = omap_inth_write,
327 .endianness = DEVICE_NATIVE_ENDIAN,
328 .valid = {
329 .min_access_size = 4,
330 .max_access_size = 4,
331 },
332 };
333
334 static void omap_inth_reset(DeviceState *dev)
335 {
336 struct omap_intr_handler_s *s = OMAP_INTC(dev);
337 int i;
338
339 for (i = 0; i < s->nbanks; ++i){
340 s->bank[i].irqs = 0x00000000;
341 s->bank[i].mask = 0xffffffff;
342 s->bank[i].sens_edge = 0x00000000;
343 s->bank[i].fiq = 0x00000000;
344 s->bank[i].inputs = 0x00000000;
345 s->bank[i].swi = 0x00000000;
346 memset(s->bank[i].priority, 0, sizeof(s->bank[i].priority));
347
348 if (s->level_only)
349 s->bank[i].sens_edge = 0xffffffff;
350 }
351
352 s->new_agr[0] = ~0;
353 s->new_agr[1] = ~0;
354 s->sir_intr[0] = 0;
355 s->sir_intr[1] = 0;
356 s->autoidle = 0;
357 s->mask = ~0;
358
359 qemu_set_irq(s->parent_intr[0], 0);
360 qemu_set_irq(s->parent_intr[1], 0);
361 }
362
363 static int omap_intc_init(SysBusDevice *sbd)
364 {
365 DeviceState *dev = DEVICE(sbd);
366 struct omap_intr_handler_s *s = OMAP_INTC(dev);
367
368 if (!s->iclk) {
369 hw_error("omap-intc: clk not connected\n");
370 }
371 s->nbanks = 1;
372 sysbus_init_irq(sbd, &s->parent_intr[0]);
373 sysbus_init_irq(sbd, &s->parent_intr[1]);
374 qdev_init_gpio_in(dev, omap_set_intr, s->nbanks * 32);
375 memory_region_init_io(&s->mmio, OBJECT(s), &omap_inth_mem_ops, s,
376 "omap-intc", s->size);
377 sysbus_init_mmio(sbd, &s->mmio);
378 return 0;
379 }
380
381 static Property omap_intc_properties[] = {
382 DEFINE_PROP_UINT32("size", struct omap_intr_handler_s, size, 0x100),
383 DEFINE_PROP_PTR("clk", struct omap_intr_handler_s, iclk),
384 DEFINE_PROP_END_OF_LIST(),
385 };
386
387 static void omap_intc_class_init(ObjectClass *klass, void *data)
388 {
389 DeviceClass *dc = DEVICE_CLASS(klass);
390 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
391
392 k->init = omap_intc_init;
393 dc->reset = omap_inth_reset;
394 dc->props = omap_intc_properties;
395 }
396
397 static const TypeInfo omap_intc_info = {
398 .name = "omap-intc",
399 .parent = TYPE_OMAP_INTC,
400 .class_init = omap_intc_class_init,
401 };
402
403 static uint64_t omap2_inth_read(void *opaque, hwaddr addr,
404 unsigned size)
405 {
406 struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
407 int offset = addr;
408 int bank_no, line_no;
409 struct omap_intr_handler_bank_s *bank = NULL;
410
411 if ((offset & 0xf80) == 0x80) {
412 bank_no = (offset & 0x60) >> 5;
413 if (bank_no < s->nbanks) {
414 offset &= ~0x60;
415 bank = &s->bank[bank_no];
416 } else {
417 OMAP_BAD_REG(addr);
418 return 0;
419 }
420 }
421
422 switch (offset) {
423 case 0x00: /* INTC_REVISION */
424 return s->revision;
425
426 case 0x10: /* INTC_SYSCONFIG */
427 return (s->autoidle >> 2) & 1;
428
429 case 0x14: /* INTC_SYSSTATUS */
430 return 1; /* RESETDONE */
431
432 case 0x40: /* INTC_SIR_IRQ */
433 return s->sir_intr[0];
434
435 case 0x44: /* INTC_SIR_FIQ */
436 return s->sir_intr[1];
437
438 case 0x48: /* INTC_CONTROL */
439 return (!s->mask) << 2; /* GLOBALMASK */
440
441 case 0x4c: /* INTC_PROTECTION */
442 return 0;
443
444 case 0x50: /* INTC_IDLE */
445 return s->autoidle & 3;
446
447 /* Per-bank registers */
448 case 0x80: /* INTC_ITR */
449 return bank->inputs;
450
451 case 0x84: /* INTC_MIR */
452 return bank->mask;
453
454 case 0x88: /* INTC_MIR_CLEAR */
455 case 0x8c: /* INTC_MIR_SET */
456 return 0;
457
458 case 0x90: /* INTC_ISR_SET */
459 return bank->swi;
460
461 case 0x94: /* INTC_ISR_CLEAR */
462 return 0;
463
464 case 0x98: /* INTC_PENDING_IRQ */
465 return bank->irqs & ~bank->mask & ~bank->fiq;
466
467 case 0x9c: /* INTC_PENDING_FIQ */
468 return bank->irqs & ~bank->mask & bank->fiq;
469
470 /* Per-line registers */
471 case 0x100 ... 0x300: /* INTC_ILR */
472 bank_no = (offset - 0x100) >> 7;
473 if (bank_no > s->nbanks)
474 break;
475 bank = &s->bank[bank_no];
476 line_no = (offset & 0x7f) >> 2;
477 return (bank->priority[line_no] << 2) |
478 ((bank->fiq >> line_no) & 1);
479 }
480 OMAP_BAD_REG(addr);
481 return 0;
482 }
483
484 static void omap2_inth_write(void *opaque, hwaddr addr,
485 uint64_t value, unsigned size)
486 {
487 struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
488 int offset = addr;
489 int bank_no, line_no;
490 struct omap_intr_handler_bank_s *bank = NULL;
491
492 if ((offset & 0xf80) == 0x80) {
493 bank_no = (offset & 0x60) >> 5;
494 if (bank_no < s->nbanks) {
495 offset &= ~0x60;
496 bank = &s->bank[bank_no];
497 } else {
498 OMAP_BAD_REG(addr);
499 return;
500 }
501 }
502
503 switch (offset) {
504 case 0x10: /* INTC_SYSCONFIG */
505 s->autoidle &= 4;
506 s->autoidle |= (value & 1) << 2;
507 if (value & 2) { /* SOFTRESET */
508 omap_inth_reset(DEVICE(s));
509 }
510 return;
511
512 case 0x48: /* INTC_CONTROL */
513 s->mask = (value & 4) ? 0 : ~0; /* GLOBALMASK */
514 if (value & 2) { /* NEWFIQAGR */
515 qemu_set_irq(s->parent_intr[1], 0);
516 s->new_agr[1] = ~0;
517 omap_inth_update(s, 1);
518 }
519 if (value & 1) { /* NEWIRQAGR */
520 qemu_set_irq(s->parent_intr[0], 0);
521 s->new_agr[0] = ~0;
522 omap_inth_update(s, 0);
523 }
524 return;
525
526 case 0x4c: /* INTC_PROTECTION */
527 /* TODO: Make a bitmap (or sizeof(char)map) of access privileges
528 * for every register, see Chapter 3 and 4 for privileged mode. */
529 if (value & 1)
530 fprintf(stderr, "%s: protection mode enable attempt\n",
531 __FUNCTION__);
532 return;
533
534 case 0x50: /* INTC_IDLE */
535 s->autoidle &= ~3;
536 s->autoidle |= value & 3;
537 return;
538
539 /* Per-bank registers */
540 case 0x84: /* INTC_MIR */
541 bank->mask = value;
542 omap_inth_update(s, 0);
543 omap_inth_update(s, 1);
544 return;
545
546 case 0x88: /* INTC_MIR_CLEAR */
547 bank->mask &= ~value;
548 omap_inth_update(s, 0);
549 omap_inth_update(s, 1);
550 return;
551
552 case 0x8c: /* INTC_MIR_SET */
553 bank->mask |= value;
554 return;
555
556 case 0x90: /* INTC_ISR_SET */
557 bank->irqs |= bank->swi |= value;
558 omap_inth_update(s, 0);
559 omap_inth_update(s, 1);
560 return;
561
562 case 0x94: /* INTC_ISR_CLEAR */
563 bank->swi &= ~value;
564 bank->irqs = bank->swi & bank->inputs;
565 return;
566
567 /* Per-line registers */
568 case 0x100 ... 0x300: /* INTC_ILR */
569 bank_no = (offset - 0x100) >> 7;
570 if (bank_no > s->nbanks)
571 break;
572 bank = &s->bank[bank_no];
573 line_no = (offset & 0x7f) >> 2;
574 bank->priority[line_no] = (value >> 2) & 0x3f;
575 bank->fiq &= ~(1 << line_no);
576 bank->fiq |= (value & 1) << line_no;
577 return;
578
579 case 0x00: /* INTC_REVISION */
580 case 0x14: /* INTC_SYSSTATUS */
581 case 0x40: /* INTC_SIR_IRQ */
582 case 0x44: /* INTC_SIR_FIQ */
583 case 0x80: /* INTC_ITR */
584 case 0x98: /* INTC_PENDING_IRQ */
585 case 0x9c: /* INTC_PENDING_FIQ */
586 OMAP_RO_REG(addr);
587 return;
588 }
589 OMAP_BAD_REG(addr);
590 }
591
592 static const MemoryRegionOps omap2_inth_mem_ops = {
593 .read = omap2_inth_read,
594 .write = omap2_inth_write,
595 .endianness = DEVICE_NATIVE_ENDIAN,
596 .valid = {
597 .min_access_size = 4,
598 .max_access_size = 4,
599 },
600 };
601
602 static int omap2_intc_init(SysBusDevice *sbd)
603 {
604 DeviceState *dev = DEVICE(sbd);
605 struct omap_intr_handler_s *s = OMAP_INTC(dev);
606
607 if (!s->iclk) {
608 hw_error("omap2-intc: iclk not connected\n");
609 }
610 if (!s->fclk) {
611 hw_error("omap2-intc: fclk not connected\n");
612 }
613 s->level_only = 1;
614 s->nbanks = 3;
615 sysbus_init_irq(sbd, &s->parent_intr[0]);
616 sysbus_init_irq(sbd, &s->parent_intr[1]);
617 qdev_init_gpio_in(dev, omap_set_intr_noedge, s->nbanks * 32);
618 memory_region_init_io(&s->mmio, OBJECT(s), &omap2_inth_mem_ops, s,
619 "omap2-intc", 0x1000);
620 sysbus_init_mmio(sbd, &s->mmio);
621 return 0;
622 }
623
624 static Property omap2_intc_properties[] = {
625 DEFINE_PROP_UINT8("revision", struct omap_intr_handler_s,
626 revision, 0x21),
627 DEFINE_PROP_PTR("iclk", struct omap_intr_handler_s, iclk),
628 DEFINE_PROP_PTR("fclk", struct omap_intr_handler_s, fclk),
629 DEFINE_PROP_END_OF_LIST(),
630 };
631
632 static void omap2_intc_class_init(ObjectClass *klass, void *data)
633 {
634 DeviceClass *dc = DEVICE_CLASS(klass);
635 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
636
637 k->init = omap2_intc_init;
638 dc->reset = omap_inth_reset;
639 dc->props = omap2_intc_properties;
640 }
641
642 static const TypeInfo omap2_intc_info = {
643 .name = "omap2-intc",
644 .parent = TYPE_OMAP_INTC,
645 .class_init = omap2_intc_class_init,
646 };
647
648 static const TypeInfo omap_intc_type_info = {
649 .name = TYPE_OMAP_INTC,
650 .parent = TYPE_SYS_BUS_DEVICE,
651 .instance_size = sizeof(struct omap_intr_handler_s),
652 .abstract = true,
653 };
654
655 static void omap_intc_register_types(void)
656 {
657 type_register_static(&omap_intc_type_info);
658 type_register_static(&omap_intc_info);
659 type_register_static(&omap2_intc_info);
660 }
661
662 type_init(omap_intc_register_types)
QEmu