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3f10bcbb FC |
1 | /* |
2 | * QEMU GRLIB IRQMP Emulator | |
3 | * | |
4 | * (Multiprocessor and extended interrupt not supported) | |
5 | * | |
6 | * Copyright (c) 2010-2011 AdaCore | |
7 | * | |
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: | |
14 | * | |
15 | * The above copyright notice and this permission notice shall be included in | |
16 | * all copies or substantial portions of the Software. | |
17 | * | |
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 | |
24 | * THE SOFTWARE. | |
25 | */ | |
26 | ||
db5ebe5f | 27 | #include "qemu/osdep.h" |
83c9f4ca | 28 | #include "hw/sysbus.h" |
3f10bcbb FC |
29 | #include "cpu.h" |
30 | ||
0d09e41a | 31 | #include "hw/sparc/grlib.h" |
3f10bcbb FC |
32 | |
33 | #include "trace.h" | |
22c70d8a | 34 | #include "qapi/error.h" |
3f10bcbb FC |
35 | |
36 | #define IRQMP_MAX_CPU 16 | |
37 | #define IRQMP_REG_SIZE 256 /* Size of memory mapped registers */ | |
38 | ||
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 | |
49 | ||
730bf932 AF |
50 | #define TYPE_GRLIB_IRQMP "grlib,irqmp" |
51 | #define GRLIB_IRQMP(obj) OBJECT_CHECK(IRQMP, (obj), TYPE_GRLIB_IRQMP) | |
52 | ||
3f10bcbb FC |
53 | typedef struct IRQMPState IRQMPState; |
54 | ||
55 | typedef struct IRQMP { | |
730bf932 AF |
56 | SysBusDevice parent_obj; |
57 | ||
847b52c1 | 58 | MemoryRegion iomem; |
3f10bcbb FC |
59 | |
60 | void *set_pil_in; | |
61 | void *set_pil_in_opaque; | |
62 | ||
63 | IRQMPState *state; | |
64 | } IRQMP; | |
65 | ||
66 | struct IRQMPState { | |
67 | uint32_t level; | |
68 | uint32_t pending; | |
69 | uint32_t clear; | |
70 | uint32_t broadcast; | |
71 | ||
72 | uint32_t mask[IRQMP_MAX_CPU]; | |
73 | uint32_t force[IRQMP_MAX_CPU]; | |
74 | uint32_t extended[IRQMP_MAX_CPU]; | |
75 | ||
76 | IRQMP *parent; | |
77 | }; | |
78 | ||
79 | static void grlib_irqmp_check_irqs(IRQMPState *state) | |
80 | { | |
81 | uint32_t pend = 0; | |
82 | uint32_t level0 = 0; | |
83 | uint32_t level1 = 0; | |
84 | set_pil_in_fn set_pil_in; | |
85 | ||
86 | assert(state != NULL); | |
87 | assert(state->parent != NULL); | |
88 | ||
89 | /* IRQ for CPU 0 (no SMP support) */ | |
90 | pend = (state->pending | state->force[0]) | |
91 | & state->mask[0]; | |
92 | ||
93 | level0 = pend & ~state->level; | |
94 | level1 = pend & state->level; | |
95 | ||
96 | trace_grlib_irqmp_check_irqs(state->pending, state->force[0], | |
97 | state->mask[0], level1, level0); | |
98 | ||
99 | set_pil_in = (set_pil_in_fn)state->parent->set_pil_in; | |
100 | ||
101 | /* Trigger level1 interrupt first and level0 if there is no level1 */ | |
102 | if (level1 != 0) { | |
103 | set_pil_in(state->parent->set_pil_in_opaque, level1); | |
104 | } else { | |
105 | set_pil_in(state->parent->set_pil_in_opaque, level0); | |
106 | } | |
107 | } | |
108 | ||
109 | void grlib_irqmp_ack(DeviceState *dev, int intno) | |
110 | { | |
730bf932 | 111 | IRQMP *irqmp = GRLIB_IRQMP(dev); |
3f10bcbb FC |
112 | IRQMPState *state; |
113 | uint32_t mask; | |
114 | ||
3f10bcbb FC |
115 | state = irqmp->state; |
116 | assert(state != NULL); | |
117 | ||
118 | intno &= 15; | |
119 | mask = 1 << intno; | |
120 | ||
121 | trace_grlib_irqmp_ack(intno); | |
122 | ||
123 | /* Clear registers */ | |
124 | state->pending &= ~mask; | |
125 | state->force[0] &= ~mask; /* Only CPU 0 (No SMP support) */ | |
126 | ||
127 | grlib_irqmp_check_irqs(state); | |
128 | } | |
129 | ||
130 | void grlib_irqmp_set_irq(void *opaque, int irq, int level) | |
131 | { | |
730bf932 | 132 | IRQMP *irqmp = GRLIB_IRQMP(opaque); |
3f10bcbb FC |
133 | IRQMPState *s; |
134 | int i = 0; | |
135 | ||
3f10bcbb FC |
136 | s = irqmp->state; |
137 | assert(s != NULL); | |
138 | assert(s->parent != NULL); | |
139 | ||
140 | ||
141 | if (level) { | |
142 | trace_grlib_irqmp_set_irq(irq); | |
143 | ||
144 | if (s->broadcast & 1 << irq) { | |
145 | /* Broadcasted IRQ */ | |
146 | for (i = 0; i < IRQMP_MAX_CPU; i++) { | |
147 | s->force[i] |= 1 << irq; | |
148 | } | |
149 | } else { | |
150 | s->pending |= 1 << irq; | |
151 | } | |
152 | grlib_irqmp_check_irqs(s); | |
153 | ||
154 | } | |
155 | } | |
156 | ||
a8170e5e | 157 | static uint64_t grlib_irqmp_read(void *opaque, hwaddr addr, |
847b52c1 | 158 | unsigned size) |
3f10bcbb FC |
159 | { |
160 | IRQMP *irqmp = opaque; | |
161 | IRQMPState *state; | |
162 | ||
163 | assert(irqmp != NULL); | |
164 | state = irqmp->state; | |
165 | assert(state != NULL); | |
166 | ||
167 | addr &= 0xff; | |
168 | ||
169 | /* global registers */ | |
170 | switch (addr) { | |
171 | case LEVEL_OFFSET: | |
172 | return state->level; | |
173 | ||
174 | case PENDING_OFFSET: | |
175 | return state->pending; | |
176 | ||
177 | case FORCE0_OFFSET: | |
178 | /* This register is an "alias" for the force register of CPU 0 */ | |
179 | return state->force[0]; | |
180 | ||
181 | case CLEAR_OFFSET: | |
182 | case MP_STATUS_OFFSET: | |
183 | /* Always read as 0 */ | |
184 | return 0; | |
185 | ||
186 | case BROADCAST_OFFSET: | |
187 | return state->broadcast; | |
188 | ||
189 | default: | |
190 | break; | |
191 | } | |
192 | ||
193 | /* mask registers */ | |
194 | if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) { | |
195 | int cpu = (addr - MASK_OFFSET) / 4; | |
196 | assert(cpu >= 0 && cpu < IRQMP_MAX_CPU); | |
197 | ||
198 | return state->mask[cpu]; | |
199 | } | |
200 | ||
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); | |
205 | ||
206 | return state->force[cpu]; | |
207 | } | |
208 | ||
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); | |
213 | ||
214 | return state->extended[cpu]; | |
215 | } | |
216 | ||
b4548fcc | 217 | trace_grlib_irqmp_readl_unknown(addr); |
3f10bcbb FC |
218 | return 0; |
219 | } | |
220 | ||
a8170e5e | 221 | static void grlib_irqmp_write(void *opaque, hwaddr addr, |
847b52c1 | 222 | uint64_t value, unsigned size) |
3f10bcbb FC |
223 | { |
224 | IRQMP *irqmp = opaque; | |
225 | IRQMPState *state; | |
226 | ||
227 | assert(irqmp != NULL); | |
228 | state = irqmp->state; | |
229 | assert(state != NULL); | |
230 | ||
231 | addr &= 0xff; | |
232 | ||
233 | /* global registers */ | |
234 | switch (addr) { | |
235 | case LEVEL_OFFSET: | |
236 | value &= 0xFFFF << 1; /* clean up the value */ | |
237 | state->level = value; | |
238 | return; | |
239 | ||
240 | case PENDING_OFFSET: | |
241 | /* Read Only */ | |
242 | return; | |
243 | ||
244 | case FORCE0_OFFSET: | |
245 | /* This register is an "alias" for the force register of CPU 0 */ | |
246 | ||
247 | value &= 0xFFFE; /* clean up the value */ | |
248 | state->force[0] = value; | |
249 | grlib_irqmp_check_irqs(irqmp->state); | |
250 | return; | |
251 | ||
252 | case CLEAR_OFFSET: | |
253 | value &= ~1; /* clean up the value */ | |
254 | state->pending &= ~value; | |
255 | return; | |
256 | ||
257 | case MP_STATUS_OFFSET: | |
258 | /* Read Only (no SMP support) */ | |
259 | return; | |
260 | ||
261 | case BROADCAST_OFFSET: | |
262 | value &= 0xFFFE; /* clean up the value */ | |
263 | state->broadcast = value; | |
264 | return; | |
265 | ||
266 | default: | |
267 | break; | |
268 | } | |
269 | ||
270 | /* mask registers */ | |
271 | if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) { | |
272 | int cpu = (addr - MASK_OFFSET) / 4; | |
273 | assert(cpu >= 0 && cpu < IRQMP_MAX_CPU); | |
274 | ||
275 | value &= ~1; /* clean up the value */ | |
276 | state->mask[cpu] = value; | |
277 | grlib_irqmp_check_irqs(irqmp->state); | |
278 | return; | |
279 | } | |
280 | ||
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); | |
285 | ||
286 | uint32_t force = value & 0xFFFE; | |
287 | uint32_t clear = (value >> 16) & 0xFFFE; | |
288 | uint32_t old = state->force[cpu]; | |
289 | ||
290 | state->force[cpu] = (old | force) & ~clear; | |
291 | grlib_irqmp_check_irqs(irqmp->state); | |
292 | return; | |
293 | } | |
294 | ||
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); | |
299 | ||
300 | value &= 0xF; /* clean up the value */ | |
301 | state->extended[cpu] = value; | |
302 | return; | |
303 | } | |
304 | ||
b4548fcc | 305 | trace_grlib_irqmp_writel_unknown(addr, value); |
3f10bcbb FC |
306 | } |
307 | ||
847b52c1 AK |
308 | static const MemoryRegionOps grlib_irqmp_ops = { |
309 | .read = grlib_irqmp_read, | |
310 | .write = grlib_irqmp_write, | |
311 | .endianness = DEVICE_NATIVE_ENDIAN, | |
312 | .valid = { | |
313 | .min_access_size = 4, | |
314 | .max_access_size = 4, | |
315 | }, | |
3f10bcbb FC |
316 | }; |
317 | ||
318 | static void grlib_irqmp_reset(DeviceState *d) | |
319 | { | |
730bf932 | 320 | IRQMP *irqmp = GRLIB_IRQMP(d); |
3f10bcbb FC |
321 | assert(irqmp->state != NULL); |
322 | ||
323 | memset(irqmp->state, 0, sizeof *irqmp->state); | |
324 | irqmp->state->parent = irqmp; | |
325 | } | |
326 | ||
22c70d8a | 327 | static void grlib_irqmp_init(Object *obj) |
3f10bcbb | 328 | { |
22c70d8a XZ |
329 | IRQMP *irqmp = GRLIB_IRQMP(obj); |
330 | SysBusDevice *dev = SYS_BUS_DEVICE(obj); | |
3f10bcbb | 331 | |
22c70d8a | 332 | memory_region_init_io(&irqmp->iomem, obj, &grlib_irqmp_ops, irqmp, |
847b52c1 | 333 | "irqmp", IRQMP_REG_SIZE); |
3f10bcbb | 334 | |
7267c094 | 335 | irqmp->state = g_malloc0(sizeof *irqmp->state); |
3f10bcbb | 336 | |
750ecd44 | 337 | sysbus_init_mmio(dev, &irqmp->iomem); |
22c70d8a | 338 | } |
3f10bcbb | 339 | |
22c70d8a XZ |
340 | static void grlib_irqmp_realize(DeviceState *dev, Error **errp) |
341 | { | |
342 | IRQMP *irqmp = GRLIB_IRQMP(dev); | |
343 | ||
344 | /* Check parameters */ | |
345 | if (irqmp->set_pil_in == NULL) { | |
346 | error_setg(errp, "set_pil_in cannot be NULL."); | |
347 | } | |
3f10bcbb FC |
348 | } |
349 | ||
999e12bb AL |
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(), | |
354 | }; | |
355 | ||
356 | static void grlib_irqmp_class_init(ObjectClass *klass, void *data) | |
357 | { | |
39bffca2 | 358 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb | 359 | |
39bffca2 AL |
360 | dc->reset = grlib_irqmp_reset; |
361 | dc->props = grlib_irqmp_properties; | |
1b111dc1 MA |
362 | /* Reason: pointer properties "set_pil_in", "set_pil_in_opaque" */ |
363 | dc->cannot_instantiate_with_device_add_yet = true; | |
22c70d8a | 364 | dc->realize = grlib_irqmp_realize; |
999e12bb AL |
365 | } |
366 | ||
8c43a6f0 | 367 | static const TypeInfo grlib_irqmp_info = { |
730bf932 | 368 | .name = TYPE_GRLIB_IRQMP, |
39bffca2 AL |
369 | .parent = TYPE_SYS_BUS_DEVICE, |
370 | .instance_size = sizeof(IRQMP), | |
22c70d8a | 371 | .instance_init = grlib_irqmp_init, |
39bffca2 | 372 | .class_init = grlib_irqmp_class_init, |
3f10bcbb FC |
373 | }; |
374 | ||
83f7d43a | 375 | static void grlib_irqmp_register_types(void) |
3f10bcbb | 376 | { |
39bffca2 | 377 | type_register_static(&grlib_irqmp_info); |
3f10bcbb FC |
378 | } |
379 | ||
83f7d43a | 380 | type_init(grlib_irqmp_register_types) |