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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 | ||
83c9f4ca | 27 | #include "hw/sysbus.h" |
3f10bcbb FC |
28 | #include "cpu.h" |
29 | ||
0d09e41a | 30 | #include "hw/sparc/grlib.h" |
3f10bcbb FC |
31 | |
32 | #include "trace.h" | |
33 | ||
34 | #define IRQMP_MAX_CPU 16 | |
35 | #define IRQMP_REG_SIZE 256 /* Size of memory mapped registers */ | |
36 | ||
37 | /* Memory mapped register offsets */ | |
38 | #define LEVEL_OFFSET 0x00 | |
39 | #define PENDING_OFFSET 0x04 | |
40 | #define FORCE0_OFFSET 0x08 | |
41 | #define CLEAR_OFFSET 0x0C | |
42 | #define MP_STATUS_OFFSET 0x10 | |
43 | #define BROADCAST_OFFSET 0x14 | |
44 | #define MASK_OFFSET 0x40 | |
45 | #define FORCE_OFFSET 0x80 | |
46 | #define EXTENDED_OFFSET 0xC0 | |
47 | ||
730bf932 AF |
48 | #define TYPE_GRLIB_IRQMP "grlib,irqmp" |
49 | #define GRLIB_IRQMP(obj) OBJECT_CHECK(IRQMP, (obj), TYPE_GRLIB_IRQMP) | |
50 | ||
3f10bcbb FC |
51 | typedef struct IRQMPState IRQMPState; |
52 | ||
53 | typedef struct IRQMP { | |
730bf932 AF |
54 | SysBusDevice parent_obj; |
55 | ||
847b52c1 | 56 | MemoryRegion iomem; |
3f10bcbb FC |
57 | |
58 | void *set_pil_in; | |
59 | void *set_pil_in_opaque; | |
60 | ||
61 | IRQMPState *state; | |
62 | } IRQMP; | |
63 | ||
64 | struct IRQMPState { | |
65 | uint32_t level; | |
66 | uint32_t pending; | |
67 | uint32_t clear; | |
68 | uint32_t broadcast; | |
69 | ||
70 | uint32_t mask[IRQMP_MAX_CPU]; | |
71 | uint32_t force[IRQMP_MAX_CPU]; | |
72 | uint32_t extended[IRQMP_MAX_CPU]; | |
73 | ||
74 | IRQMP *parent; | |
75 | }; | |
76 | ||
77 | static void grlib_irqmp_check_irqs(IRQMPState *state) | |
78 | { | |
79 | uint32_t pend = 0; | |
80 | uint32_t level0 = 0; | |
81 | uint32_t level1 = 0; | |
82 | set_pil_in_fn set_pil_in; | |
83 | ||
84 | assert(state != NULL); | |
85 | assert(state->parent != NULL); | |
86 | ||
87 | /* IRQ for CPU 0 (no SMP support) */ | |
88 | pend = (state->pending | state->force[0]) | |
89 | & state->mask[0]; | |
90 | ||
91 | level0 = pend & ~state->level; | |
92 | level1 = pend & state->level; | |
93 | ||
94 | trace_grlib_irqmp_check_irqs(state->pending, state->force[0], | |
95 | state->mask[0], level1, level0); | |
96 | ||
97 | set_pil_in = (set_pil_in_fn)state->parent->set_pil_in; | |
98 | ||
99 | /* Trigger level1 interrupt first and level0 if there is no level1 */ | |
100 | if (level1 != 0) { | |
101 | set_pil_in(state->parent->set_pil_in_opaque, level1); | |
102 | } else { | |
103 | set_pil_in(state->parent->set_pil_in_opaque, level0); | |
104 | } | |
105 | } | |
106 | ||
107 | void grlib_irqmp_ack(DeviceState *dev, int intno) | |
108 | { | |
730bf932 | 109 | IRQMP *irqmp = GRLIB_IRQMP(dev); |
3f10bcbb FC |
110 | IRQMPState *state; |
111 | uint32_t mask; | |
112 | ||
3f10bcbb FC |
113 | state = irqmp->state; |
114 | assert(state != NULL); | |
115 | ||
116 | intno &= 15; | |
117 | mask = 1 << intno; | |
118 | ||
119 | trace_grlib_irqmp_ack(intno); | |
120 | ||
121 | /* Clear registers */ | |
122 | state->pending &= ~mask; | |
123 | state->force[0] &= ~mask; /* Only CPU 0 (No SMP support) */ | |
124 | ||
125 | grlib_irqmp_check_irqs(state); | |
126 | } | |
127 | ||
128 | void grlib_irqmp_set_irq(void *opaque, int irq, int level) | |
129 | { | |
730bf932 | 130 | IRQMP *irqmp = GRLIB_IRQMP(opaque); |
3f10bcbb FC |
131 | IRQMPState *s; |
132 | int i = 0; | |
133 | ||
3f10bcbb FC |
134 | s = irqmp->state; |
135 | assert(s != NULL); | |
136 | assert(s->parent != NULL); | |
137 | ||
138 | ||
139 | if (level) { | |
140 | trace_grlib_irqmp_set_irq(irq); | |
141 | ||
142 | if (s->broadcast & 1 << irq) { | |
143 | /* Broadcasted IRQ */ | |
144 | for (i = 0; i < IRQMP_MAX_CPU; i++) { | |
145 | s->force[i] |= 1 << irq; | |
146 | } | |
147 | } else { | |
148 | s->pending |= 1 << irq; | |
149 | } | |
150 | grlib_irqmp_check_irqs(s); | |
151 | ||
152 | } | |
153 | } | |
154 | ||
a8170e5e | 155 | static uint64_t grlib_irqmp_read(void *opaque, hwaddr addr, |
847b52c1 | 156 | unsigned size) |
3f10bcbb FC |
157 | { |
158 | IRQMP *irqmp = opaque; | |
159 | IRQMPState *state; | |
160 | ||
161 | assert(irqmp != NULL); | |
162 | state = irqmp->state; | |
163 | assert(state != NULL); | |
164 | ||
165 | addr &= 0xff; | |
166 | ||
167 | /* global registers */ | |
168 | switch (addr) { | |
169 | case LEVEL_OFFSET: | |
170 | return state->level; | |
171 | ||
172 | case PENDING_OFFSET: | |
173 | return state->pending; | |
174 | ||
175 | case FORCE0_OFFSET: | |
176 | /* This register is an "alias" for the force register of CPU 0 */ | |
177 | return state->force[0]; | |
178 | ||
179 | case CLEAR_OFFSET: | |
180 | case MP_STATUS_OFFSET: | |
181 | /* Always read as 0 */ | |
182 | return 0; | |
183 | ||
184 | case BROADCAST_OFFSET: | |
185 | return state->broadcast; | |
186 | ||
187 | default: | |
188 | break; | |
189 | } | |
190 | ||
191 | /* mask registers */ | |
192 | if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) { | |
193 | int cpu = (addr - MASK_OFFSET) / 4; | |
194 | assert(cpu >= 0 && cpu < IRQMP_MAX_CPU); | |
195 | ||
196 | return state->mask[cpu]; | |
197 | } | |
198 | ||
199 | /* force registers */ | |
200 | if (addr >= FORCE_OFFSET && addr < EXTENDED_OFFSET) { | |
201 | int cpu = (addr - FORCE_OFFSET) / 4; | |
202 | assert(cpu >= 0 && cpu < IRQMP_MAX_CPU); | |
203 | ||
204 | return state->force[cpu]; | |
205 | } | |
206 | ||
207 | /* extended (not supported) */ | |
208 | if (addr >= EXTENDED_OFFSET && addr < IRQMP_REG_SIZE) { | |
209 | int cpu = (addr - EXTENDED_OFFSET) / 4; | |
210 | assert(cpu >= 0 && cpu < IRQMP_MAX_CPU); | |
211 | ||
212 | return state->extended[cpu]; | |
213 | } | |
214 | ||
b4548fcc | 215 | trace_grlib_irqmp_readl_unknown(addr); |
3f10bcbb FC |
216 | return 0; |
217 | } | |
218 | ||
a8170e5e | 219 | static void grlib_irqmp_write(void *opaque, hwaddr addr, |
847b52c1 | 220 | uint64_t value, unsigned size) |
3f10bcbb FC |
221 | { |
222 | IRQMP *irqmp = opaque; | |
223 | IRQMPState *state; | |
224 | ||
225 | assert(irqmp != NULL); | |
226 | state = irqmp->state; | |
227 | assert(state != NULL); | |
228 | ||
229 | addr &= 0xff; | |
230 | ||
231 | /* global registers */ | |
232 | switch (addr) { | |
233 | case LEVEL_OFFSET: | |
234 | value &= 0xFFFF << 1; /* clean up the value */ | |
235 | state->level = value; | |
236 | return; | |
237 | ||
238 | case PENDING_OFFSET: | |
239 | /* Read Only */ | |
240 | return; | |
241 | ||
242 | case FORCE0_OFFSET: | |
243 | /* This register is an "alias" for the force register of CPU 0 */ | |
244 | ||
245 | value &= 0xFFFE; /* clean up the value */ | |
246 | state->force[0] = value; | |
247 | grlib_irqmp_check_irqs(irqmp->state); | |
248 | return; | |
249 | ||
250 | case CLEAR_OFFSET: | |
251 | value &= ~1; /* clean up the value */ | |
252 | state->pending &= ~value; | |
253 | return; | |
254 | ||
255 | case MP_STATUS_OFFSET: | |
256 | /* Read Only (no SMP support) */ | |
257 | return; | |
258 | ||
259 | case BROADCAST_OFFSET: | |
260 | value &= 0xFFFE; /* clean up the value */ | |
261 | state->broadcast = value; | |
262 | return; | |
263 | ||
264 | default: | |
265 | break; | |
266 | } | |
267 | ||
268 | /* mask registers */ | |
269 | if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) { | |
270 | int cpu = (addr - MASK_OFFSET) / 4; | |
271 | assert(cpu >= 0 && cpu < IRQMP_MAX_CPU); | |
272 | ||
273 | value &= ~1; /* clean up the value */ | |
274 | state->mask[cpu] = value; | |
275 | grlib_irqmp_check_irqs(irqmp->state); | |
276 | return; | |
277 | } | |
278 | ||
279 | /* force registers */ | |
280 | if (addr >= FORCE_OFFSET && addr < EXTENDED_OFFSET) { | |
281 | int cpu = (addr - FORCE_OFFSET) / 4; | |
282 | assert(cpu >= 0 && cpu < IRQMP_MAX_CPU); | |
283 | ||
284 | uint32_t force = value & 0xFFFE; | |
285 | uint32_t clear = (value >> 16) & 0xFFFE; | |
286 | uint32_t old = state->force[cpu]; | |
287 | ||
288 | state->force[cpu] = (old | force) & ~clear; | |
289 | grlib_irqmp_check_irqs(irqmp->state); | |
290 | return; | |
291 | } | |
292 | ||
293 | /* extended (not supported) */ | |
294 | if (addr >= EXTENDED_OFFSET && addr < IRQMP_REG_SIZE) { | |
295 | int cpu = (addr - EXTENDED_OFFSET) / 4; | |
296 | assert(cpu >= 0 && cpu < IRQMP_MAX_CPU); | |
297 | ||
298 | value &= 0xF; /* clean up the value */ | |
299 | state->extended[cpu] = value; | |
300 | return; | |
301 | } | |
302 | ||
b4548fcc | 303 | trace_grlib_irqmp_writel_unknown(addr, value); |
3f10bcbb FC |
304 | } |
305 | ||
847b52c1 AK |
306 | static const MemoryRegionOps grlib_irqmp_ops = { |
307 | .read = grlib_irqmp_read, | |
308 | .write = grlib_irqmp_write, | |
309 | .endianness = DEVICE_NATIVE_ENDIAN, | |
310 | .valid = { | |
311 | .min_access_size = 4, | |
312 | .max_access_size = 4, | |
313 | }, | |
3f10bcbb FC |
314 | }; |
315 | ||
316 | static void grlib_irqmp_reset(DeviceState *d) | |
317 | { | |
730bf932 | 318 | IRQMP *irqmp = GRLIB_IRQMP(d); |
3f10bcbb FC |
319 | assert(irqmp->state != NULL); |
320 | ||
321 | memset(irqmp->state, 0, sizeof *irqmp->state); | |
322 | irqmp->state->parent = irqmp; | |
323 | } | |
324 | ||
325 | static int grlib_irqmp_init(SysBusDevice *dev) | |
326 | { | |
730bf932 | 327 | IRQMP *irqmp = GRLIB_IRQMP(dev); |
3f10bcbb FC |
328 | |
329 | /* Check parameters */ | |
330 | if (irqmp->set_pil_in == NULL) { | |
331 | return -1; | |
332 | } | |
333 | ||
1437c94b | 334 | memory_region_init_io(&irqmp->iomem, OBJECT(dev), &grlib_irqmp_ops, irqmp, |
847b52c1 | 335 | "irqmp", IRQMP_REG_SIZE); |
3f10bcbb | 336 | |
7267c094 | 337 | irqmp->state = g_malloc0(sizeof *irqmp->state); |
3f10bcbb | 338 | |
750ecd44 | 339 | sysbus_init_mmio(dev, &irqmp->iomem); |
3f10bcbb FC |
340 | |
341 | return 0; | |
342 | } | |
343 | ||
999e12bb AL |
344 | static Property grlib_irqmp_properties[] = { |
345 | DEFINE_PROP_PTR("set_pil_in", IRQMP, set_pil_in), | |
346 | DEFINE_PROP_PTR("set_pil_in_opaque", IRQMP, set_pil_in_opaque), | |
347 | DEFINE_PROP_END_OF_LIST(), | |
348 | }; | |
349 | ||
350 | static void grlib_irqmp_class_init(ObjectClass *klass, void *data) | |
351 | { | |
39bffca2 | 352 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb AL |
353 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
354 | ||
355 | k->init = grlib_irqmp_init; | |
39bffca2 AL |
356 | dc->reset = grlib_irqmp_reset; |
357 | dc->props = grlib_irqmp_properties; | |
1b111dc1 MA |
358 | /* Reason: pointer properties "set_pil_in", "set_pil_in_opaque" */ |
359 | dc->cannot_instantiate_with_device_add_yet = true; | |
999e12bb AL |
360 | } |
361 | ||
8c43a6f0 | 362 | static const TypeInfo grlib_irqmp_info = { |
730bf932 | 363 | .name = TYPE_GRLIB_IRQMP, |
39bffca2 AL |
364 | .parent = TYPE_SYS_BUS_DEVICE, |
365 | .instance_size = sizeof(IRQMP), | |
366 | .class_init = grlib_irqmp_class_init, | |
3f10bcbb FC |
367 | }; |
368 | ||
83f7d43a | 369 | static void grlib_irqmp_register_types(void) |
3f10bcbb | 370 | { |
39bffca2 | 371 | type_register_static(&grlib_irqmp_info); |
3f10bcbb FC |
372 | } |
373 | ||
83f7d43a | 374 | type_init(grlib_irqmp_register_types) |