2 * TI OMAP interrupt controller emulation.
5 * Copyright (C) 2007-2008 Nokia Corporation
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.
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.
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/>.
20 #include "qemu/osdep.h"
22 #include "hw/arm/omap.h"
23 #include "hw/sysbus.h"
24 #include "qemu/error-report.h"
25 #include "qapi/error.h"
27 /* Interrupt Handlers */
28 struct omap_intr_handler_bank_s {
35 unsigned char priority[32];
38 #define TYPE_OMAP_INTC "common-omap-intc"
39 #define OMAP_INTC(obj) \
40 OBJECT_CHECK(struct omap_intr_handler_s, (obj), TYPE_OMAP_INTC)
42 struct omap_intr_handler_s {
43 SysBusDevice parent_obj;
46 qemu_irq parent_intr[2];
61 struct omap_intr_handler_bank_s bank[3];
64 static void omap_inth_sir_update(struct omap_intr_handler_s *s, int is_fiq)
66 int i, j, sir_intr, p_intr, p;
71 /* Find the interrupt line with the highest dynamic priority.
72 * Note: 0 denotes the hightest priority.
73 * If all interrupts have the same priority, the default order is IRQ_N,
74 * IRQ_N-1,...,IRQ_0. */
75 for (j = 0; j < s->nbanks; ++j) {
76 level = s->bank[j].irqs & ~s->bank[j].mask &
77 (is_fiq ? s->bank[j].fiq : ~s->bank[j].fiq);
81 p = s->bank[j].priority[i];
84 sir_intr = 32 * j + i;
89 s->sir_intr[is_fiq] = sir_intr;
92 static inline void omap_inth_update(struct omap_intr_handler_s *s, int is_fiq)
95 uint32_t has_intr = 0;
97 for (i = 0; i < s->nbanks; ++i)
98 has_intr |= s->bank[i].irqs & ~s->bank[i].mask &
99 (is_fiq ? s->bank[i].fiq : ~s->bank[i].fiq);
101 if (s->new_agr[is_fiq] & has_intr & s->mask) {
102 s->new_agr[is_fiq] = 0;
103 omap_inth_sir_update(s, is_fiq);
104 qemu_set_irq(s->parent_intr[is_fiq], 1);
108 #define INT_FALLING_EDGE 0
109 #define INT_LOW_LEVEL 1
111 static void omap_set_intr(void *opaque, int irq, int req)
113 struct omap_intr_handler_s *ih = (struct omap_intr_handler_s *) opaque;
116 struct omap_intr_handler_bank_s *bank = &ih->bank[irq >> 5];
120 rise = ~bank->irqs & (1 << n);
121 if (~bank->sens_edge & (1 << n))
122 rise &= ~bank->inputs;
124 bank->inputs |= (1 << n);
127 omap_inth_update(ih, 0);
128 omap_inth_update(ih, 1);
131 rise = bank->sens_edge & bank->irqs & (1 << n);
133 bank->inputs &= ~(1 << n);
137 /* Simplified version with no edge detection */
138 static void omap_set_intr_noedge(void *opaque, int irq, int req)
140 struct omap_intr_handler_s *ih = (struct omap_intr_handler_s *) opaque;
143 struct omap_intr_handler_bank_s *bank = &ih->bank[irq >> 5];
147 rise = ~bank->inputs & (1 << n);
149 bank->irqs |= bank->inputs |= rise;
150 omap_inth_update(ih, 0);
151 omap_inth_update(ih, 1);
154 bank->irqs = (bank->inputs &= ~(1 << n)) | bank->swi;
157 static uint64_t omap_inth_read(void *opaque, hwaddr addr,
160 struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
161 int i, offset = addr;
162 int bank_no = offset >> 8;
164 struct omap_intr_handler_bank_s *bank = &s->bank[bank_no];
174 case 0x10: /* SIR_IRQ_CODE */
175 case 0x14: /* SIR_FIQ_CODE */
178 line_no = s->sir_intr[(offset - 0x10) >> 2];
179 bank = &s->bank[line_no >> 5];
181 if (((bank->sens_edge >> i) & 1) == INT_FALLING_EDGE)
182 bank->irqs &= ~(1 << i);
185 case 0x18: /* CONTROL_REG */
190 case 0x1c: /* ILR0 */
191 case 0x20: /* ILR1 */
192 case 0x24: /* ILR2 */
193 case 0x28: /* ILR3 */
194 case 0x2c: /* ILR4 */
195 case 0x30: /* ILR5 */
196 case 0x34: /* ILR6 */
197 case 0x38: /* ILR7 */
198 case 0x3c: /* ILR8 */
199 case 0x40: /* ILR9 */
200 case 0x44: /* ILR10 */
201 case 0x48: /* ILR11 */
202 case 0x4c: /* ILR12 */
203 case 0x50: /* ILR13 */
204 case 0x54: /* ILR14 */
205 case 0x58: /* ILR15 */
206 case 0x5c: /* ILR16 */
207 case 0x60: /* ILR17 */
208 case 0x64: /* ILR18 */
209 case 0x68: /* ILR19 */
210 case 0x6c: /* ILR20 */
211 case 0x70: /* ILR21 */
212 case 0x74: /* ILR22 */
213 case 0x78: /* ILR23 */
214 case 0x7c: /* ILR24 */
215 case 0x80: /* ILR25 */
216 case 0x84: /* ILR26 */
217 case 0x88: /* ILR27 */
218 case 0x8c: /* ILR28 */
219 case 0x90: /* ILR29 */
220 case 0x94: /* ILR30 */
221 case 0x98: /* ILR31 */
222 i = (offset - 0x1c) >> 2;
223 return (bank->priority[i] << 2) |
224 (((bank->sens_edge >> i) & 1) << 1) |
225 ((bank->fiq >> i) & 1);
235 static void omap_inth_write(void *opaque, hwaddr addr,
236 uint64_t value, unsigned size)
238 struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
239 int i, offset = addr;
240 int bank_no = offset >> 8;
241 struct omap_intr_handler_bank_s *bank = &s->bank[bank_no];
246 /* Important: ignore the clearing if the IRQ is level-triggered and
247 the input bit is 1 */
248 bank->irqs &= value | (bank->inputs & bank->sens_edge);
253 omap_inth_update(s, 0);
254 omap_inth_update(s, 1);
257 case 0x10: /* SIR_IRQ_CODE */
258 case 0x14: /* SIR_FIQ_CODE */
262 case 0x18: /* CONTROL_REG */
266 qemu_set_irq(s->parent_intr[1], 0);
268 omap_inth_update(s, 1);
271 qemu_set_irq(s->parent_intr[0], 0);
273 omap_inth_update(s, 0);
277 case 0x1c: /* ILR0 */
278 case 0x20: /* ILR1 */
279 case 0x24: /* ILR2 */
280 case 0x28: /* ILR3 */
281 case 0x2c: /* ILR4 */
282 case 0x30: /* ILR5 */
283 case 0x34: /* ILR6 */
284 case 0x38: /* ILR7 */
285 case 0x3c: /* ILR8 */
286 case 0x40: /* ILR9 */
287 case 0x44: /* ILR10 */
288 case 0x48: /* ILR11 */
289 case 0x4c: /* ILR12 */
290 case 0x50: /* ILR13 */
291 case 0x54: /* ILR14 */
292 case 0x58: /* ILR15 */
293 case 0x5c: /* ILR16 */
294 case 0x60: /* ILR17 */
295 case 0x64: /* ILR18 */
296 case 0x68: /* ILR19 */
297 case 0x6c: /* ILR20 */
298 case 0x70: /* ILR21 */
299 case 0x74: /* ILR22 */
300 case 0x78: /* ILR23 */
301 case 0x7c: /* ILR24 */
302 case 0x80: /* ILR25 */
303 case 0x84: /* ILR26 */
304 case 0x88: /* ILR27 */
305 case 0x8c: /* ILR28 */
306 case 0x90: /* ILR29 */
307 case 0x94: /* ILR30 */
308 case 0x98: /* ILR31 */
309 i = (offset - 0x1c) >> 2;
310 bank->priority[i] = (value >> 2) & 0x1f;
311 bank->sens_edge &= ~(1 << i);
312 bank->sens_edge |= ((value >> 1) & 1) << i;
313 bank->fiq &= ~(1 << i);
314 bank->fiq |= (value & 1) << i;
318 for (i = 0; i < 32; i ++)
319 if (value & (1 << i)) {
320 omap_set_intr(s, 32 * bank_no + i, 1);
328 static const MemoryRegionOps omap_inth_mem_ops = {
329 .read = omap_inth_read,
330 .write = omap_inth_write,
331 .endianness = DEVICE_NATIVE_ENDIAN,
333 .min_access_size = 4,
334 .max_access_size = 4,
338 static void omap_inth_reset(DeviceState *dev)
340 struct omap_intr_handler_s *s = OMAP_INTC(dev);
343 for (i = 0; i < s->nbanks; ++i){
344 s->bank[i].irqs = 0x00000000;
345 s->bank[i].mask = 0xffffffff;
346 s->bank[i].sens_edge = 0x00000000;
347 s->bank[i].fiq = 0x00000000;
348 s->bank[i].inputs = 0x00000000;
349 s->bank[i].swi = 0x00000000;
350 memset(s->bank[i].priority, 0, sizeof(s->bank[i].priority));
353 s->bank[i].sens_edge = 0xffffffff;
363 qemu_set_irq(s->parent_intr[0], 0);
364 qemu_set_irq(s->parent_intr[1], 0);
367 static void omap_intc_init(Object *obj)
369 DeviceState *dev = DEVICE(obj);
370 struct omap_intr_handler_s *s = OMAP_INTC(obj);
371 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
374 sysbus_init_irq(sbd, &s->parent_intr[0]);
375 sysbus_init_irq(sbd, &s->parent_intr[1]);
376 qdev_init_gpio_in(dev, omap_set_intr, s->nbanks * 32);
377 memory_region_init_io(&s->mmio, obj, &omap_inth_mem_ops, s,
378 "omap-intc", s->size);
379 sysbus_init_mmio(sbd, &s->mmio);
382 static void omap_intc_realize(DeviceState *dev, Error **errp)
384 struct omap_intr_handler_s *s = OMAP_INTC(dev);
387 error_setg(errp, "omap-intc: clk not connected");
391 static Property omap_intc_properties[] = {
392 DEFINE_PROP_UINT32("size", struct omap_intr_handler_s, size, 0x100),
393 DEFINE_PROP_PTR("clk", struct omap_intr_handler_s, iclk),
394 DEFINE_PROP_END_OF_LIST(),
397 static void omap_intc_class_init(ObjectClass *klass, void *data)
399 DeviceClass *dc = DEVICE_CLASS(klass);
401 dc->reset = omap_inth_reset;
402 dc->props = omap_intc_properties;
403 /* Reason: pointer property "clk" */
404 dc->user_creatable = false;
405 dc->realize = omap_intc_realize;
408 static const TypeInfo omap_intc_info = {
410 .parent = TYPE_OMAP_INTC,
411 .instance_init = omap_intc_init,
412 .class_init = omap_intc_class_init,
415 static uint64_t omap2_inth_read(void *opaque, hwaddr addr,
418 struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
420 int bank_no, line_no;
421 struct omap_intr_handler_bank_s *bank = NULL;
423 if ((offset & 0xf80) == 0x80) {
424 bank_no = (offset & 0x60) >> 5;
425 if (bank_no < s->nbanks) {
427 bank = &s->bank[bank_no];
435 case 0x00: /* INTC_REVISION */
438 case 0x10: /* INTC_SYSCONFIG */
439 return (s->autoidle >> 2) & 1;
441 case 0x14: /* INTC_SYSSTATUS */
442 return 1; /* RESETDONE */
444 case 0x40: /* INTC_SIR_IRQ */
445 return s->sir_intr[0];
447 case 0x44: /* INTC_SIR_FIQ */
448 return s->sir_intr[1];
450 case 0x48: /* INTC_CONTROL */
451 return (!s->mask) << 2; /* GLOBALMASK */
453 case 0x4c: /* INTC_PROTECTION */
456 case 0x50: /* INTC_IDLE */
457 return s->autoidle & 3;
459 /* Per-bank registers */
460 case 0x80: /* INTC_ITR */
463 case 0x84: /* INTC_MIR */
466 case 0x88: /* INTC_MIR_CLEAR */
467 case 0x8c: /* INTC_MIR_SET */
470 case 0x90: /* INTC_ISR_SET */
473 case 0x94: /* INTC_ISR_CLEAR */
476 case 0x98: /* INTC_PENDING_IRQ */
477 return bank->irqs & ~bank->mask & ~bank->fiq;
479 case 0x9c: /* INTC_PENDING_FIQ */
480 return bank->irqs & ~bank->mask & bank->fiq;
482 /* Per-line registers */
483 case 0x100 ... 0x300: /* INTC_ILR */
484 bank_no = (offset - 0x100) >> 7;
485 if (bank_no > s->nbanks)
487 bank = &s->bank[bank_no];
488 line_no = (offset & 0x7f) >> 2;
489 return (bank->priority[line_no] << 2) |
490 ((bank->fiq >> line_no) & 1);
496 static void omap2_inth_write(void *opaque, hwaddr addr,
497 uint64_t value, unsigned size)
499 struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
501 int bank_no, line_no;
502 struct omap_intr_handler_bank_s *bank = NULL;
504 if ((offset & 0xf80) == 0x80) {
505 bank_no = (offset & 0x60) >> 5;
506 if (bank_no < s->nbanks) {
508 bank = &s->bank[bank_no];
516 case 0x10: /* INTC_SYSCONFIG */
518 s->autoidle |= (value & 1) << 2;
519 if (value & 2) { /* SOFTRESET */
520 omap_inth_reset(DEVICE(s));
524 case 0x48: /* INTC_CONTROL */
525 s->mask = (value & 4) ? 0 : ~0; /* GLOBALMASK */
526 if (value & 2) { /* NEWFIQAGR */
527 qemu_set_irq(s->parent_intr[1], 0);
529 omap_inth_update(s, 1);
531 if (value & 1) { /* NEWIRQAGR */
532 qemu_set_irq(s->parent_intr[0], 0);
534 omap_inth_update(s, 0);
538 case 0x4c: /* INTC_PROTECTION */
539 /* TODO: Make a bitmap (or sizeof(char)map) of access privileges
540 * for every register, see Chapter 3 and 4 for privileged mode. */
542 fprintf(stderr, "%s: protection mode enable attempt\n",
546 case 0x50: /* INTC_IDLE */
548 s->autoidle |= value & 3;
551 /* Per-bank registers */
552 case 0x84: /* INTC_MIR */
554 omap_inth_update(s, 0);
555 omap_inth_update(s, 1);
558 case 0x88: /* INTC_MIR_CLEAR */
559 bank->mask &= ~value;
560 omap_inth_update(s, 0);
561 omap_inth_update(s, 1);
564 case 0x8c: /* INTC_MIR_SET */
568 case 0x90: /* INTC_ISR_SET */
569 bank->irqs |= bank->swi |= value;
570 omap_inth_update(s, 0);
571 omap_inth_update(s, 1);
574 case 0x94: /* INTC_ISR_CLEAR */
576 bank->irqs = bank->swi & bank->inputs;
579 /* Per-line registers */
580 case 0x100 ... 0x300: /* INTC_ILR */
581 bank_no = (offset - 0x100) >> 7;
582 if (bank_no > s->nbanks)
584 bank = &s->bank[bank_no];
585 line_no = (offset & 0x7f) >> 2;
586 bank->priority[line_no] = (value >> 2) & 0x3f;
587 bank->fiq &= ~(1 << line_no);
588 bank->fiq |= (value & 1) << line_no;
591 case 0x00: /* INTC_REVISION */
592 case 0x14: /* INTC_SYSSTATUS */
593 case 0x40: /* INTC_SIR_IRQ */
594 case 0x44: /* INTC_SIR_FIQ */
595 case 0x80: /* INTC_ITR */
596 case 0x98: /* INTC_PENDING_IRQ */
597 case 0x9c: /* INTC_PENDING_FIQ */
604 static const MemoryRegionOps omap2_inth_mem_ops = {
605 .read = omap2_inth_read,
606 .write = omap2_inth_write,
607 .endianness = DEVICE_NATIVE_ENDIAN,
609 .min_access_size = 4,
610 .max_access_size = 4,
614 static void omap2_intc_init(Object *obj)
616 DeviceState *dev = DEVICE(obj);
617 struct omap_intr_handler_s *s = OMAP_INTC(obj);
618 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
622 sysbus_init_irq(sbd, &s->parent_intr[0]);
623 sysbus_init_irq(sbd, &s->parent_intr[1]);
624 qdev_init_gpio_in(dev, omap_set_intr_noedge, s->nbanks * 32);
625 memory_region_init_io(&s->mmio, obj, &omap2_inth_mem_ops, s,
626 "omap2-intc", 0x1000);
627 sysbus_init_mmio(sbd, &s->mmio);
630 static void omap2_intc_realize(DeviceState *dev, Error **errp)
632 struct omap_intr_handler_s *s = OMAP_INTC(dev);
635 error_setg(errp, "omap2-intc: iclk not connected");
639 error_setg(errp, "omap2-intc: fclk not connected");
644 static Property omap2_intc_properties[] = {
645 DEFINE_PROP_UINT8("revision", struct omap_intr_handler_s,
647 DEFINE_PROP_PTR("iclk", struct omap_intr_handler_s, iclk),
648 DEFINE_PROP_PTR("fclk", struct omap_intr_handler_s, fclk),
649 DEFINE_PROP_END_OF_LIST(),
652 static void omap2_intc_class_init(ObjectClass *klass, void *data)
654 DeviceClass *dc = DEVICE_CLASS(klass);
656 dc->reset = omap_inth_reset;
657 dc->props = omap2_intc_properties;
658 /* Reason: pointer property "iclk", "fclk" */
659 dc->user_creatable = false;
660 dc->realize = omap2_intc_realize;
663 static const TypeInfo omap2_intc_info = {
664 .name = "omap2-intc",
665 .parent = TYPE_OMAP_INTC,
666 .instance_init = omap2_intc_init,
667 .class_init = omap2_intc_class_init,
670 static const TypeInfo omap_intc_type_info = {
671 .name = TYPE_OMAP_INTC,
672 .parent = TYPE_SYS_BUS_DEVICE,
673 .instance_size = sizeof(struct omap_intr_handler_s),
677 static void omap_intc_register_types(void)
679 type_register_static(&omap_intc_type_info);
680 type_register_static(&omap_intc_info);
681 type_register_static(&omap2_intc_info);
684 type_init(omap_intc_register_types)