2 * QEMU GRLIB IRQMP Emulator
4 * (Multiprocessor and extended interrupt not supported)
6 * Copyright (c) 2010-2019 AdaCore
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 #include "qemu/osdep.h"
28 #include "hw/sysbus.h"
31 #include "hw/sparc/grlib.h"
34 #include "qapi/error.h"
36 #define IRQMP_MAX_CPU 16
37 #define IRQMP_REG_SIZE 256 /* Size of memory mapped registers */
39 /* Memory mapped register offsets */
40 #define LEVEL_OFFSET 0x00
41 #define PENDING_OFFSET 0x04
42 #define FORCE0_OFFSET 0x08
43 #define CLEAR_OFFSET 0x0C
44 #define MP_STATUS_OFFSET 0x10
45 #define BROADCAST_OFFSET 0x14
46 #define MASK_OFFSET 0x40
47 #define FORCE_OFFSET 0x80
48 #define EXTENDED_OFFSET 0xC0
50 #define GRLIB_IRQMP(obj) OBJECT_CHECK(IRQMP, (obj), TYPE_GRLIB_IRQMP)
52 typedef struct IRQMPState IRQMPState;
54 typedef struct IRQMP {
55 SysBusDevice parent_obj;
60 void *set_pil_in_opaque;
71 uint32_t mask[IRQMP_MAX_CPU];
72 uint32_t force[IRQMP_MAX_CPU];
73 uint32_t extended[IRQMP_MAX_CPU];
78 static void grlib_irqmp_check_irqs(IRQMPState *state)
83 set_pil_in_fn set_pil_in;
85 assert(state != NULL);
86 assert(state->parent != NULL);
88 /* IRQ for CPU 0 (no SMP support) */
89 pend = (state->pending | state->force[0])
92 level0 = pend & ~state->level;
93 level1 = pend & state->level;
95 trace_grlib_irqmp_check_irqs(state->pending, state->force[0],
96 state->mask[0], level1, level0);
98 set_pil_in = (set_pil_in_fn)state->parent->set_pil_in;
100 /* Trigger level1 interrupt first and level0 if there is no level1 */
102 set_pil_in(state->parent->set_pil_in_opaque, level1);
104 set_pil_in(state->parent->set_pil_in_opaque, level0);
108 static void grlib_irqmp_ack_mask(IRQMPState *state, uint32_t mask)
110 /* Clear registers */
111 state->pending &= ~mask;
112 state->force[0] &= ~mask; /* Only CPU 0 (No SMP support) */
114 grlib_irqmp_check_irqs(state);
117 void grlib_irqmp_ack(DeviceState *dev, int intno)
119 IRQMP *irqmp = GRLIB_IRQMP(dev);
123 state = irqmp->state;
124 assert(state != NULL);
129 trace_grlib_irqmp_ack(intno);
131 grlib_irqmp_ack_mask(state, mask);
134 void grlib_irqmp_set_irq(void *opaque, int irq, int level)
136 IRQMP *irqmp = GRLIB_IRQMP(opaque);
142 assert(s->parent != NULL);
146 trace_grlib_irqmp_set_irq(irq);
148 if (s->broadcast & 1 << irq) {
149 /* Broadcasted IRQ */
150 for (i = 0; i < IRQMP_MAX_CPU; i++) {
151 s->force[i] |= 1 << irq;
154 s->pending |= 1 << irq;
156 grlib_irqmp_check_irqs(s);
161 static uint64_t grlib_irqmp_read(void *opaque, hwaddr addr,
164 IRQMP *irqmp = opaque;
167 assert(irqmp != NULL);
168 state = irqmp->state;
169 assert(state != NULL);
173 /* global registers */
179 return state->pending;
182 /* This register is an "alias" for the force register of CPU 0 */
183 return state->force[0];
186 case MP_STATUS_OFFSET:
187 /* Always read as 0 */
190 case BROADCAST_OFFSET:
191 return state->broadcast;
198 if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) {
199 int cpu = (addr - MASK_OFFSET) / 4;
200 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
202 return state->mask[cpu];
205 /* force registers */
206 if (addr >= FORCE_OFFSET && addr < EXTENDED_OFFSET) {
207 int cpu = (addr - FORCE_OFFSET) / 4;
208 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
210 return state->force[cpu];
213 /* extended (not supported) */
214 if (addr >= EXTENDED_OFFSET && addr < IRQMP_REG_SIZE) {
215 int cpu = (addr - EXTENDED_OFFSET) / 4;
216 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
218 return state->extended[cpu];
221 trace_grlib_irqmp_readl_unknown(addr);
225 static void grlib_irqmp_write(void *opaque, hwaddr addr,
226 uint64_t value, unsigned size)
228 IRQMP *irqmp = opaque;
231 assert(irqmp != NULL);
232 state = irqmp->state;
233 assert(state != NULL);
237 /* global registers */
240 value &= 0xFFFF << 1; /* clean up the value */
241 state->level = value;
249 /* This register is an "alias" for the force register of CPU 0 */
251 value &= 0xFFFE; /* clean up the value */
252 state->force[0] = value;
253 grlib_irqmp_check_irqs(irqmp->state);
257 value &= ~1; /* clean up the value */
258 grlib_irqmp_ack_mask(state, value);
261 case MP_STATUS_OFFSET:
262 /* Read Only (no SMP support) */
265 case BROADCAST_OFFSET:
266 value &= 0xFFFE; /* clean up the value */
267 state->broadcast = value;
275 if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) {
276 int cpu = (addr - MASK_OFFSET) / 4;
277 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
279 value &= ~1; /* clean up the value */
280 state->mask[cpu] = value;
281 grlib_irqmp_check_irqs(irqmp->state);
285 /* force registers */
286 if (addr >= FORCE_OFFSET && addr < EXTENDED_OFFSET) {
287 int cpu = (addr - FORCE_OFFSET) / 4;
288 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
290 uint32_t force = value & 0xFFFE;
291 uint32_t clear = (value >> 16) & 0xFFFE;
292 uint32_t old = state->force[cpu];
294 state->force[cpu] = (old | force) & ~clear;
295 grlib_irqmp_check_irqs(irqmp->state);
299 /* extended (not supported) */
300 if (addr >= EXTENDED_OFFSET && addr < IRQMP_REG_SIZE) {
301 int cpu = (addr - EXTENDED_OFFSET) / 4;
302 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
304 value &= 0xF; /* clean up the value */
305 state->extended[cpu] = value;
309 trace_grlib_irqmp_writel_unknown(addr, value);
312 static const MemoryRegionOps grlib_irqmp_ops = {
313 .read = grlib_irqmp_read,
314 .write = grlib_irqmp_write,
315 .endianness = DEVICE_NATIVE_ENDIAN,
317 .min_access_size = 4,
318 .max_access_size = 4,
322 static void grlib_irqmp_reset(DeviceState *d)
324 IRQMP *irqmp = GRLIB_IRQMP(d);
325 assert(irqmp->state != NULL);
327 memset(irqmp->state, 0, sizeof *irqmp->state);
328 irqmp->state->parent = irqmp;
331 static void grlib_irqmp_init(Object *obj)
333 IRQMP *irqmp = GRLIB_IRQMP(obj);
334 SysBusDevice *dev = SYS_BUS_DEVICE(obj);
336 memory_region_init_io(&irqmp->iomem, obj, &grlib_irqmp_ops, irqmp,
337 "irqmp", IRQMP_REG_SIZE);
339 irqmp->state = g_malloc0(sizeof *irqmp->state);
341 sysbus_init_mmio(dev, &irqmp->iomem);
344 static void grlib_irqmp_realize(DeviceState *dev, Error **errp)
346 IRQMP *irqmp = GRLIB_IRQMP(dev);
348 /* Check parameters */
349 if (irqmp->set_pil_in == NULL) {
350 error_setg(errp, "set_pil_in cannot be NULL.");
354 static Property grlib_irqmp_properties[] = {
355 DEFINE_PROP_PTR("set_pil_in", IRQMP, set_pil_in),
356 DEFINE_PROP_PTR("set_pil_in_opaque", IRQMP, set_pil_in_opaque),
357 DEFINE_PROP_END_OF_LIST(),
360 static void grlib_irqmp_class_init(ObjectClass *klass, void *data)
362 DeviceClass *dc = DEVICE_CLASS(klass);
364 dc->reset = grlib_irqmp_reset;
365 dc->props = grlib_irqmp_properties;
366 /* Reason: pointer properties "set_pil_in", "set_pil_in_opaque" */
367 dc->user_creatable = false;
368 dc->realize = grlib_irqmp_realize;
371 static const TypeInfo grlib_irqmp_info = {
372 .name = TYPE_GRLIB_IRQMP,
373 .parent = TYPE_SYS_BUS_DEVICE,
374 .instance_size = sizeof(IRQMP),
375 .instance_init = grlib_irqmp_init,
376 .class_init = grlib_irqmp_class_init,
379 static void grlib_irqmp_register_types(void)
381 type_register_static(&grlib_irqmp_info);
384 type_init(grlib_irqmp_register_types)