2 * QEMU GRLIB IRQMP Emulator
4 * (Multiprocessor and extended interrupt not supported)
6 * Copyright (c) 2010-2011 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 TYPE_GRLIB_IRQMP "grlib,irqmp"
51 #define GRLIB_IRQMP(obj) OBJECT_CHECK(IRQMP, (obj), TYPE_GRLIB_IRQMP)
53 typedef struct IRQMPState IRQMPState;
55 typedef struct IRQMP {
56 SysBusDevice parent_obj;
61 void *set_pil_in_opaque;
72 uint32_t mask[IRQMP_MAX_CPU];
73 uint32_t force[IRQMP_MAX_CPU];
74 uint32_t extended[IRQMP_MAX_CPU];
79 static void grlib_irqmp_check_irqs(IRQMPState *state)
84 set_pil_in_fn set_pil_in;
86 assert(state != NULL);
87 assert(state->parent != NULL);
89 /* IRQ for CPU 0 (no SMP support) */
90 pend = (state->pending | state->force[0])
93 level0 = pend & ~state->level;
94 level1 = pend & state->level;
96 trace_grlib_irqmp_check_irqs(state->pending, state->force[0],
97 state->mask[0], level1, level0);
99 set_pil_in = (set_pil_in_fn)state->parent->set_pil_in;
101 /* Trigger level1 interrupt first and level0 if there is no level1 */
103 set_pil_in(state->parent->set_pil_in_opaque, level1);
105 set_pil_in(state->parent->set_pil_in_opaque, level0);
109 void grlib_irqmp_ack(DeviceState *dev, int intno)
111 IRQMP *irqmp = GRLIB_IRQMP(dev);
115 state = irqmp->state;
116 assert(state != NULL);
121 trace_grlib_irqmp_ack(intno);
123 /* Clear registers */
124 state->pending &= ~mask;
125 state->force[0] &= ~mask; /* Only CPU 0 (No SMP support) */
127 grlib_irqmp_check_irqs(state);
130 void grlib_irqmp_set_irq(void *opaque, int irq, int level)
132 IRQMP *irqmp = GRLIB_IRQMP(opaque);
138 assert(s->parent != NULL);
142 trace_grlib_irqmp_set_irq(irq);
144 if (s->broadcast & 1 << irq) {
145 /* Broadcasted IRQ */
146 for (i = 0; i < IRQMP_MAX_CPU; i++) {
147 s->force[i] |= 1 << irq;
150 s->pending |= 1 << irq;
152 grlib_irqmp_check_irqs(s);
157 static uint64_t grlib_irqmp_read(void *opaque, hwaddr addr,
160 IRQMP *irqmp = opaque;
163 assert(irqmp != NULL);
164 state = irqmp->state;
165 assert(state != NULL);
169 /* global registers */
175 return state->pending;
178 /* This register is an "alias" for the force register of CPU 0 */
179 return state->force[0];
182 case MP_STATUS_OFFSET:
183 /* Always read as 0 */
186 case BROADCAST_OFFSET:
187 return state->broadcast;
194 if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) {
195 int cpu = (addr - MASK_OFFSET) / 4;
196 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
198 return state->mask[cpu];
201 /* force registers */
202 if (addr >= FORCE_OFFSET && addr < EXTENDED_OFFSET) {
203 int cpu = (addr - FORCE_OFFSET) / 4;
204 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
206 return state->force[cpu];
209 /* extended (not supported) */
210 if (addr >= EXTENDED_OFFSET && addr < IRQMP_REG_SIZE) {
211 int cpu = (addr - EXTENDED_OFFSET) / 4;
212 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
214 return state->extended[cpu];
217 trace_grlib_irqmp_readl_unknown(addr);
221 static void grlib_irqmp_write(void *opaque, hwaddr addr,
222 uint64_t value, unsigned size)
224 IRQMP *irqmp = opaque;
227 assert(irqmp != NULL);
228 state = irqmp->state;
229 assert(state != NULL);
233 /* global registers */
236 value &= 0xFFFF << 1; /* clean up the value */
237 state->level = value;
245 /* This register is an "alias" for the force register of CPU 0 */
247 value &= 0xFFFE; /* clean up the value */
248 state->force[0] = value;
249 grlib_irqmp_check_irqs(irqmp->state);
253 value &= ~1; /* clean up the value */
254 state->pending &= ~value;
257 case MP_STATUS_OFFSET:
258 /* Read Only (no SMP support) */
261 case BROADCAST_OFFSET:
262 value &= 0xFFFE; /* clean up the value */
263 state->broadcast = value;
271 if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) {
272 int cpu = (addr - MASK_OFFSET) / 4;
273 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
275 value &= ~1; /* clean up the value */
276 state->mask[cpu] = value;
277 grlib_irqmp_check_irqs(irqmp->state);
281 /* force registers */
282 if (addr >= FORCE_OFFSET && addr < EXTENDED_OFFSET) {
283 int cpu = (addr - FORCE_OFFSET) / 4;
284 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
286 uint32_t force = value & 0xFFFE;
287 uint32_t clear = (value >> 16) & 0xFFFE;
288 uint32_t old = state->force[cpu];
290 state->force[cpu] = (old | force) & ~clear;
291 grlib_irqmp_check_irqs(irqmp->state);
295 /* extended (not supported) */
296 if (addr >= EXTENDED_OFFSET && addr < IRQMP_REG_SIZE) {
297 int cpu = (addr - EXTENDED_OFFSET) / 4;
298 assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
300 value &= 0xF; /* clean up the value */
301 state->extended[cpu] = value;
305 trace_grlib_irqmp_writel_unknown(addr, value);
308 static const MemoryRegionOps grlib_irqmp_ops = {
309 .read = grlib_irqmp_read,
310 .write = grlib_irqmp_write,
311 .endianness = DEVICE_NATIVE_ENDIAN,
313 .min_access_size = 4,
314 .max_access_size = 4,
318 static void grlib_irqmp_reset(DeviceState *d)
320 IRQMP *irqmp = GRLIB_IRQMP(d);
321 assert(irqmp->state != NULL);
323 memset(irqmp->state, 0, sizeof *irqmp->state);
324 irqmp->state->parent = irqmp;
327 static void grlib_irqmp_init(Object *obj)
329 IRQMP *irqmp = GRLIB_IRQMP(obj);
330 SysBusDevice *dev = SYS_BUS_DEVICE(obj);
332 memory_region_init_io(&irqmp->iomem, obj, &grlib_irqmp_ops, irqmp,
333 "irqmp", IRQMP_REG_SIZE);
335 irqmp->state = g_malloc0(sizeof *irqmp->state);
337 sysbus_init_mmio(dev, &irqmp->iomem);
340 static void grlib_irqmp_realize(DeviceState *dev, Error **errp)
342 IRQMP *irqmp = GRLIB_IRQMP(dev);
344 /* Check parameters */
345 if (irqmp->set_pil_in == NULL) {
346 error_setg(errp, "set_pil_in cannot be NULL.");
350 static Property grlib_irqmp_properties[] = {
351 DEFINE_PROP_PTR("set_pil_in", IRQMP, set_pil_in),
352 DEFINE_PROP_PTR("set_pil_in_opaque", IRQMP, set_pil_in_opaque),
353 DEFINE_PROP_END_OF_LIST(),
356 static void grlib_irqmp_class_init(ObjectClass *klass, void *data)
358 DeviceClass *dc = DEVICE_CLASS(klass);
360 dc->reset = grlib_irqmp_reset;
361 dc->props = grlib_irqmp_properties;
362 /* Reason: pointer properties "set_pil_in", "set_pil_in_opaque" */
363 dc->cannot_instantiate_with_device_add_yet = true;
364 dc->realize = grlib_irqmp_realize;
367 static const TypeInfo grlib_irqmp_info = {
368 .name = TYPE_GRLIB_IRQMP,
369 .parent = TYPE_SYS_BUS_DEVICE,
370 .instance_size = sizeof(IRQMP),
371 .instance_init = grlib_irqmp_init,
372 .class_init = grlib_irqmp_class_init,
375 static void grlib_irqmp_register_types(void)
377 type_register_static(&grlib_irqmp_info);
380 type_init(grlib_irqmp_register_types)