xref: /freebsd/sys/dev/acpica/acpi_resource.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (c) 2000 Michael Smith
3  * Copyright (c) 2000 BSDi
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30 
31 #include "opt_acpi.h"
32 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/malloc.h>
36 #include <sys/module.h>
37 
38 #include <machine/bus.h>
39 #include <machine/resource.h>
40 #include <sys/rman.h>
41 
42 #include <contrib/dev/acpica/acpi.h>
43 #include <dev/acpica/acpivar.h>
44 
45 /* Hooks for the ACPI CA debugging infrastructure */
46 #define _COMPONENT	ACPI_BUS
47 ACPI_MODULE_NAME("RESOURCE")
48 
49 struct lookup_irq_request {
50     ACPI_RESOURCE *acpi_res;
51     struct resource *res;
52     int		counter;
53     int		rid;
54     int		found;
55 };
56 
57 static ACPI_STATUS
58 acpi_lookup_irq_handler(ACPI_RESOURCE *res, void *context)
59 {
60     struct lookup_irq_request *req;
61     u_int irqnum, irq;
62 
63     switch (res->Type) {
64     case ACPI_RESOURCE_TYPE_IRQ:
65     case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
66 	if (res->Type == ACPI_RESOURCE_TYPE_IRQ) {
67 	    irqnum = res->Data.Irq.InterruptCount;
68 	    irq = res->Data.Irq.Interrupts[0];
69 	} else {
70 	    irqnum = res->Data.ExtendedIrq.InterruptCount;
71 	    irq = res->Data.ExtendedIrq.Interrupts[0];
72 	}
73 	if (irqnum != 1)
74 	    break;
75 	req = (struct lookup_irq_request *)context;
76 	if (req->counter != req->rid) {
77 	    req->counter++;
78 	    break;
79 	}
80 	req->found = 1;
81 	KASSERT(irq == rman_get_start(req->res),
82 	    ("IRQ resources do not match"));
83 	bcopy(res, req->acpi_res, sizeof(ACPI_RESOURCE));
84 	return (AE_CTRL_TERMINATE);
85     }
86     return (AE_OK);
87 }
88 
89 ACPI_STATUS
90 acpi_lookup_irq_resource(device_t dev, int rid, struct resource *res,
91     ACPI_RESOURCE *acpi_res)
92 {
93     struct lookup_irq_request req;
94     ACPI_STATUS status;
95 
96     req.acpi_res = acpi_res;
97     req.res = res;
98     req.counter = 0;
99     req.rid = rid;
100     req.found = 0;
101     status = AcpiWalkResources(acpi_get_handle(dev), "_CRS",
102 	acpi_lookup_irq_handler, &req);
103     if (ACPI_SUCCESS(status) && req.found == 0)
104 	status = AE_NOT_FOUND;
105     return (status);
106 }
107 
108 void
109 acpi_config_intr(device_t dev, ACPI_RESOURCE *res)
110 {
111     u_int irq;
112     int pol, trig;
113 
114     switch (res->Type) {
115     case ACPI_RESOURCE_TYPE_IRQ:
116 	KASSERT(res->Data.Irq.InterruptCount == 1,
117 	    ("%s: multiple interrupts", __func__));
118 	irq = res->Data.Irq.Interrupts[0];
119 	trig = res->Data.Irq.Triggering;
120 	pol = res->Data.Irq.Polarity;
121 	break;
122     case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
123 	KASSERT(res->Data.ExtendedIrq.InterruptCount == 1,
124 	    ("%s: multiple interrupts", __func__));
125 	irq = res->Data.ExtendedIrq.Interrupts[0];
126 	trig = res->Data.ExtendedIrq.Triggering;
127 	pol = res->Data.ExtendedIrq.Polarity;
128 	break;
129     default:
130 	panic("%s: bad resource type %u", __func__, res->Type);
131     }
132     BUS_CONFIG_INTR(dev, irq, (trig == ACPI_EDGE_SENSITIVE) ?
133 	INTR_TRIGGER_EDGE : INTR_TRIGGER_LEVEL, (pol == ACPI_ACTIVE_HIGH) ?
134 	INTR_POLARITY_HIGH : INTR_POLARITY_LOW);
135 }
136 
137 /*
138  * Fetch a device's resources and associate them with the device.
139  *
140  * Note that it might be nice to also locate ACPI-specific resource items, such
141  * as GPE bits.
142  *
143  * We really need to split the resource-fetching code out from the
144  * resource-parsing code, since we may want to use the parsing
145  * code for _PRS someday.
146  */
147 ACPI_STATUS
148 acpi_parse_resources(device_t dev, ACPI_HANDLE handle,
149 		     struct acpi_parse_resource_set *set, void *arg)
150 {
151     ACPI_BUFFER		buf;
152     ACPI_RESOURCE	*res;
153     char		*curr, *last;
154     ACPI_STATUS		status;
155     void		*context;
156 
157     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
158 
159     /*
160      * Special-case some devices that abuse _PRS/_CRS to mean
161      * something other than "I consume this resource".
162      *
163      * XXX do we really need this?  It's only relevant once
164      *     we start always-allocating these resources, and even
165      *     then, the only special-cased device is likely to be
166      *     the PCI interrupt link.
167      */
168 
169     /* Fetch the device's current resources. */
170     buf.Length = ACPI_ALLOCATE_BUFFER;
171     if (ACPI_FAILURE((status = AcpiGetCurrentResources(handle, &buf)))) {
172 	if (status != AE_NOT_FOUND && status != AE_TYPE)
173 	    printf("can't fetch resources for %s - %s\n",
174 		   acpi_name(handle), AcpiFormatException(status));
175 	return_ACPI_STATUS (status);
176     }
177     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "%s - got %ld bytes of resources\n",
178 		     acpi_name(handle), (long)buf.Length));
179     set->set_init(dev, arg, &context);
180 
181     /* Iterate through the resources */
182     curr = buf.Pointer;
183     last = (char *)buf.Pointer + buf.Length;
184     while (curr < last) {
185 	res = (ACPI_RESOURCE *)curr;
186 	curr += res->Length;
187 
188 	/* Handle the individual resource types */
189 	switch(res->Type) {
190 	case ACPI_RESOURCE_TYPE_END_TAG:
191 	    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "EndTag\n"));
192 	    curr = last;
193 	    break;
194 	case ACPI_RESOURCE_TYPE_FIXED_IO:
195 	    if (res->Data.FixedIo.AddressLength <= 0)
196 		break;
197 	    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "FixedIo 0x%x/%d\n",
198 			     res->Data.FixedIo.Address,
199 			     res->Data.FixedIo.AddressLength));
200 	    set->set_ioport(dev, context,
201 			    res->Data.FixedIo.Address,
202 			    res->Data.FixedIo.AddressLength);
203 	    break;
204 	case ACPI_RESOURCE_TYPE_IO:
205 	    if (res->Data.Io.AddressLength <= 0)
206 		break;
207 	    if (res->Data.Io.Minimum == res->Data.Io.Maximum) {
208 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Io 0x%x/%d\n",
209 				 res->Data.Io.Minimum,
210 				 res->Data.Io.AddressLength));
211 		set->set_ioport(dev, context,
212 				res->Data.Io.Minimum,
213 				res->Data.Io.AddressLength);
214 	    } else {
215 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Io 0x%x-0x%x/%d\n",
216 				 res->Data.Io.Minimum,
217 				 res->Data.Io.Maximum,
218 				 res->Data.Io.AddressLength));
219 		set->set_iorange(dev, context,
220 				 res->Data.Io.Minimum,
221 				 res->Data.Io.Maximum,
222 				 res->Data.Io.AddressLength,
223 				 res->Data.Io.Alignment);
224 	    }
225 	    break;
226 	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
227 	    if (res->Data.FixedMemory32.AddressLength <= 0)
228 		break;
229 	    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "FixedMemory32 0x%x/%d\n",
230 			      res->Data.FixedMemory32.Address,
231 			      res->Data.FixedMemory32.AddressLength));
232 	    set->set_memory(dev, context,
233 			    res->Data.FixedMemory32.Address,
234 			    res->Data.FixedMemory32.AddressLength);
235 	    break;
236 	case ACPI_RESOURCE_TYPE_MEMORY32:
237 	    if (res->Data.Memory32.AddressLength <= 0)
238 		break;
239 	    if (res->Data.Memory32.Minimum ==
240 		res->Data.Memory32.Maximum) {
241 
242 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory32 0x%x/%d\n",
243 				  res->Data.Memory32.Minimum,
244 				  res->Data.Memory32.AddressLength));
245 		set->set_memory(dev, context,
246 				res->Data.Memory32.Minimum,
247 				res->Data.Memory32.AddressLength);
248 	    } else {
249 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory32 0x%x-0x%x/%d\n",
250 				 res->Data.Memory32.Minimum,
251 				 res->Data.Memory32.Maximum,
252 				 res->Data.Memory32.AddressLength));
253 		set->set_memoryrange(dev, context,
254 				     res->Data.Memory32.Minimum,
255 				     res->Data.Memory32.Maximum,
256 				     res->Data.Memory32.AddressLength,
257 				     res->Data.Memory32.Alignment);
258 	    }
259 	    break;
260 	case ACPI_RESOURCE_TYPE_MEMORY24:
261 	    if (res->Data.Memory24.AddressLength <= 0)
262 		break;
263 	    if (res->Data.Memory24.Minimum ==
264 		res->Data.Memory24.Maximum) {
265 
266 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory24 0x%x/%d\n",
267 				 res->Data.Memory24.Minimum,
268 				 res->Data.Memory24.AddressLength));
269 		set->set_memory(dev, context, res->Data.Memory24.Minimum,
270 				res->Data.Memory24.AddressLength);
271 	    } else {
272 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory24 0x%x-0x%x/%d\n",
273 				 res->Data.Memory24.Minimum,
274 				 res->Data.Memory24.Maximum,
275 				 res->Data.Memory24.AddressLength));
276 		set->set_memoryrange(dev, context,
277 				     res->Data.Memory24.Minimum,
278 				     res->Data.Memory24.Maximum,
279 				     res->Data.Memory24.AddressLength,
280 				     res->Data.Memory24.Alignment);
281 	    }
282 	    break;
283 	case ACPI_RESOURCE_TYPE_IRQ:
284 	    /*
285 	     * from 1.0b 6.4.2
286 	     * "This structure is repeated for each separate interrupt
287 	     * required"
288 	     */
289 	    set->set_irq(dev, context, res->Data.Irq.Interrupts,
290 		res->Data.Irq.InterruptCount, res->Data.Irq.Triggering,
291 		res->Data.Irq.Polarity);
292 	    break;
293 	case ACPI_RESOURCE_TYPE_DMA:
294 	    /*
295 	     * from 1.0b 6.4.3
296 	     * "This structure is repeated for each separate dma channel
297 	     * required"
298 	     */
299 	    set->set_drq(dev, context, res->Data.Dma.Channels,
300 			 res->Data.Dma.ChannelCount);
301 	    break;
302 	case ACPI_RESOURCE_TYPE_START_DEPENDENT:
303 	    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "start dependent functions\n"));
304 	    set->set_start_dependent(dev, context,
305 				     res->Data.StartDpf.CompatibilityPriority);
306 	    break;
307 	case ACPI_RESOURCE_TYPE_END_DEPENDENT:
308 	    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "end dependent functions\n"));
309 	    set->set_end_dependent(dev, context);
310 	    break;
311 	case ACPI_RESOURCE_TYPE_ADDRESS32:
312 	    if (res->Data.Address32.AddressLength <= 0)
313 		break;
314 	    if (res->Data.Address32.ProducerConsumer != ACPI_CONSUMER) {
315 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
316 		    "ignored Address32 %s producer\n",
317 		    res->Data.Address32.ResourceType == ACPI_IO_RANGE ?
318 		    "IO" : "Memory"));
319 		break;
320 	    }
321 	    if (res->Data.Address32.ResourceType != ACPI_MEMORY_RANGE &&
322 		res->Data.Address32.ResourceType != ACPI_IO_RANGE) {
323 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
324 		    "ignored Address32 for non-memory, non-I/O\n"));
325 		break;
326 	    }
327 
328 	    if (res->Data.Address32.MinAddressFixed == ACPI_ADDRESS_FIXED &&
329 		res->Data.Address32.MaxAddressFixed == ACPI_ADDRESS_FIXED) {
330 
331 		if (res->Data.Address32.ResourceType == ACPI_MEMORY_RANGE) {
332 		    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
333 				     "Address32/Memory 0x%x/%d\n",
334 				     res->Data.Address32.Minimum,
335 				     res->Data.Address32.AddressLength));
336 		    set->set_memory(dev, context,
337 				    res->Data.Address32.Minimum,
338 				    res->Data.Address32.AddressLength);
339 		} else {
340 		    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
341 				     "Address32/IO 0x%x/%d\n",
342 				     res->Data.Address32.Minimum,
343 				     res->Data.Address32.AddressLength));
344 		    set->set_ioport(dev, context,
345 				    res->Data.Address32.Minimum,
346 				    res->Data.Address32.AddressLength);
347 		}
348 	    } else {
349 		if (res->Data.Address32.ResourceType == ACPI_MEMORY_RANGE) {
350 		    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
351 				     "Address32/Memory 0x%x-0x%x/%d\n",
352 				     res->Data.Address32.Minimum,
353 				     res->Data.Address32.Maximum,
354 				     res->Data.Address32.AddressLength));
355 		    set->set_memoryrange(dev, context,
356 					  res->Data.Address32.Minimum,
357 					  res->Data.Address32.Maximum,
358 					  res->Data.Address32.AddressLength,
359 					  res->Data.Address32.Granularity);
360 		} else {
361 		    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
362 				     "Address32/IO 0x%x-0x%x/%d\n",
363 				     res->Data.Address32.Minimum,
364 				     res->Data.Address32.Maximum,
365 				     res->Data.Address32.AddressLength));
366 		    set->set_iorange(dev, context,
367 				     res->Data.Address32.Minimum,
368 				     res->Data.Address32.Maximum,
369 				     res->Data.Address32.AddressLength,
370 				     res->Data.Address32.Granularity);
371 		}
372 	    }
373 	    break;
374 	case ACPI_RESOURCE_TYPE_ADDRESS16:
375 	    if (res->Data.Address16.AddressLength <= 0)
376 		break;
377 	    if (res->Data.Address16.ProducerConsumer != ACPI_CONSUMER) {
378 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
379 		    "ignored Address16 %s producer\n",
380 		    res->Data.Address16.ResourceType == ACPI_IO_RANGE ?
381 		    "IO" : "Memory"));
382 		break;
383 	    }
384 	    if (res->Data.Address16.ResourceType != ACPI_MEMORY_RANGE &&
385 		res->Data.Address16.ResourceType != ACPI_IO_RANGE) {
386 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
387 			"ignored Address16 for non-memory, non-I/O\n"));
388 		break;
389 	    }
390 
391 	    if (res->Data.Address16.MinAddressFixed == ACPI_ADDRESS_FIXED &&
392 		res->Data.Address16.MaxAddressFixed == ACPI_ADDRESS_FIXED) {
393 
394 		if (res->Data.Address16.ResourceType == ACPI_MEMORY_RANGE) {
395 		    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
396 				     "Address16/Memory 0x%x/%d\n",
397 				     res->Data.Address16.Minimum,
398 				     res->Data.Address16.AddressLength));
399 		    set->set_memory(dev, context,
400 				    res->Data.Address16.Minimum,
401 				    res->Data.Address16.AddressLength);
402 		} else {
403 		    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
404 				     "Address16/IO 0x%x/%d\n",
405 				     res->Data.Address16.Minimum,
406 				     res->Data.Address16.AddressLength));
407 		    set->set_ioport(dev, context,
408 				    res->Data.Address16.Minimum,
409 				    res->Data.Address16.AddressLength);
410 		}
411 	    } else {
412 		if (res->Data.Address16.ResourceType == ACPI_MEMORY_RANGE) {
413 		    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
414 				     "Address16/Memory 0x%x-0x%x/%d\n",
415 				     res->Data.Address16.Minimum,
416 				     res->Data.Address16.Maximum,
417 				     res->Data.Address16.AddressLength));
418 		    set->set_memoryrange(dev, context,
419 					  res->Data.Address16.Minimum,
420 					  res->Data.Address16.Maximum,
421 					  res->Data.Address16.AddressLength,
422 					  res->Data.Address16.Granularity);
423 		} else {
424 		    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
425 				     "Address16/IO 0x%x-0x%x/%d\n",
426 				     res->Data.Address16.Minimum,
427 				     res->Data.Address16.Maximum,
428 				     res->Data.Address16.AddressLength));
429 		    set->set_iorange(dev, context,
430 				     res->Data.Address16.Minimum,
431 				     res->Data.Address16.Maximum,
432 				     res->Data.Address16.AddressLength,
433 				     res->Data.Address16.Granularity);
434 		}
435 	    }
436 	    break;
437 	case ACPI_RESOURCE_TYPE_ADDRESS64:
438 	    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
439 			     "unimplemented Address64 resource\n"));
440 	    break;
441 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
442 	    if (res->Data.ExtendedIrq.ProducerConsumer != ACPI_CONSUMER) {
443 		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
444 		    "ignored ExtIRQ producer\n"));
445 		break;
446 	    }
447 	    set->set_ext_irq(dev, context, res->Data.ExtendedIrq.Interrupts,
448 		res->Data.ExtendedIrq.InterruptCount,
449 		res->Data.ExtendedIrq.Triggering,
450 		res->Data.ExtendedIrq.Polarity);
451 	    break;
452 	case ACPI_RESOURCE_TYPE_VENDOR:
453 	    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
454 			     "unimplemented VendorSpecific resource\n"));
455 	    break;
456 	default:
457 	    break;
458 	}
459     }
460 
461     AcpiOsFree(buf.Pointer);
462     set->set_done(dev, context);
463     return_ACPI_STATUS (AE_OK);
464 }
465 
466 /*
467  * Resource-set vectors used to attach _CRS-derived resources
468  * to an ACPI device.
469  */
470 static void	acpi_res_set_init(device_t dev, void *arg, void **context);
471 static void	acpi_res_set_done(device_t dev, void *context);
472 static void	acpi_res_set_ioport(device_t dev, void *context,
473 				    u_int32_t base, u_int32_t length);
474 static void	acpi_res_set_iorange(device_t dev, void *context,
475 				     u_int32_t low, u_int32_t high,
476 				     u_int32_t length, u_int32_t align);
477 static void	acpi_res_set_memory(device_t dev, void *context,
478 				    u_int32_t base, u_int32_t length);
479 static void	acpi_res_set_memoryrange(device_t dev, void *context,
480 					 u_int32_t low, u_int32_t high,
481 					 u_int32_t length, u_int32_t align);
482 static void	acpi_res_set_irq(device_t dev, void *context, u_int8_t *irq,
483 				 int count, int trig, int pol);
484 static void	acpi_res_set_ext_irq(device_t dev, void *context,
485 				 u_int32_t *irq, int count, int trig, int pol);
486 static void	acpi_res_set_drq(device_t dev, void *context, u_int8_t *drq,
487 				 int count);
488 static void	acpi_res_set_start_dependent(device_t dev, void *context,
489 					     int preference);
490 static void	acpi_res_set_end_dependent(device_t dev, void *context);
491 
492 struct acpi_parse_resource_set acpi_res_parse_set = {
493     acpi_res_set_init,
494     acpi_res_set_done,
495     acpi_res_set_ioport,
496     acpi_res_set_iorange,
497     acpi_res_set_memory,
498     acpi_res_set_memoryrange,
499     acpi_res_set_irq,
500     acpi_res_set_ext_irq,
501     acpi_res_set_drq,
502     acpi_res_set_start_dependent,
503     acpi_res_set_end_dependent
504 };
505 
506 struct acpi_res_context {
507     int		ar_nio;
508     int		ar_nmem;
509     int		ar_nirq;
510     int		ar_ndrq;
511     void 	*ar_parent;
512 };
513 
514 static void
515 acpi_res_set_init(device_t dev, void *arg, void **context)
516 {
517     struct acpi_res_context	*cp;
518 
519     if ((cp = AcpiOsAllocate(sizeof(*cp))) != NULL) {
520 	bzero(cp, sizeof(*cp));
521 	cp->ar_parent = arg;
522 	*context = cp;
523     }
524 }
525 
526 static void
527 acpi_res_set_done(device_t dev, void *context)
528 {
529     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
530 
531     if (cp == NULL)
532 	return;
533     AcpiOsFree(cp);
534 }
535 
536 static void
537 acpi_res_set_ioport(device_t dev, void *context, u_int32_t base,
538 		    u_int32_t length)
539 {
540     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
541 
542     if (cp == NULL)
543 	return;
544     bus_set_resource(dev, SYS_RES_IOPORT, cp->ar_nio++, base, length);
545 }
546 
547 static void
548 acpi_res_set_iorange(device_t dev, void *context, u_int32_t low,
549 		     u_int32_t high, u_int32_t length, u_int32_t align)
550 {
551     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
552 
553     if (cp == NULL)
554 	return;
555     device_printf(dev, "I/O range not supported\n");
556 }
557 
558 static void
559 acpi_res_set_memory(device_t dev, void *context, u_int32_t base,
560 		    u_int32_t length)
561 {
562     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
563 
564     if (cp == NULL)
565 	return;
566 
567     bus_set_resource(dev, SYS_RES_MEMORY, cp->ar_nmem++, base, length);
568 }
569 
570 static void
571 acpi_res_set_memoryrange(device_t dev, void *context, u_int32_t low,
572 			 u_int32_t high, u_int32_t length, u_int32_t align)
573 {
574     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
575 
576     if (cp == NULL)
577 	return;
578     device_printf(dev, "memory range not supported\n");
579 }
580 
581 static void
582 acpi_res_set_irq(device_t dev, void *context, u_int8_t *irq, int count,
583     int trig, int pol)
584 {
585     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
586 
587     if (cp == NULL || irq == NULL)
588 	return;
589 
590     /* This implements no resource relocation. */
591     if (count != 1)
592 	return;
593 
594     bus_set_resource(dev, SYS_RES_IRQ, cp->ar_nirq++, *irq, 1);
595 }
596 
597 static void
598 acpi_res_set_ext_irq(device_t dev, void *context, u_int32_t *irq, int count,
599     int trig, int pol)
600 {
601     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
602 
603     if (cp == NULL || irq == NULL)
604 	return;
605 
606     /* This implements no resource relocation. */
607     if (count != 1)
608 	return;
609 
610     bus_set_resource(dev, SYS_RES_IRQ, cp->ar_nirq++, *irq, 1);
611 }
612 
613 static void
614 acpi_res_set_drq(device_t dev, void *context, u_int8_t *drq, int count)
615 {
616     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
617 
618     if (cp == NULL || drq == NULL)
619 	return;
620 
621     /* This implements no resource relocation. */
622     if (count != 1)
623 	return;
624 
625     bus_set_resource(dev, SYS_RES_DRQ, cp->ar_ndrq++, *drq, 1);
626 }
627 
628 static void
629 acpi_res_set_start_dependent(device_t dev, void *context, int preference)
630 {
631     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
632 
633     if (cp == NULL)
634 	return;
635     device_printf(dev, "dependent functions not supported\n");
636 }
637 
638 static void
639 acpi_res_set_end_dependent(device_t dev, void *context)
640 {
641     struct acpi_res_context	*cp = (struct acpi_res_context *)context;
642 
643     if (cp == NULL)
644 	return;
645     device_printf(dev, "dependent functions not supported\n");
646 }
647 
648 /*
649  * Resource-owning placeholders for IO and memory pseudo-devices.
650  *
651  * This code allocates system resources that will be used by ACPI
652  * child devices.  The acpi parent manages these resources through a
653  * private rman.
654  */
655 
656 static int	acpi_sysres_rid = 100;
657 
658 static int	acpi_sysres_probe(device_t dev);
659 static int	acpi_sysres_attach(device_t dev);
660 
661 static device_method_t acpi_sysres_methods[] = {
662     /* Device interface */
663     DEVMETHOD(device_probe,	acpi_sysres_probe),
664     DEVMETHOD(device_attach,	acpi_sysres_attach),
665 
666     {0, 0}
667 };
668 
669 static driver_t acpi_sysres_driver = {
670     "acpi_sysresource",
671     acpi_sysres_methods,
672     0,
673 };
674 
675 static devclass_t acpi_sysres_devclass;
676 DRIVER_MODULE(acpi_sysresource, acpi, acpi_sysres_driver, acpi_sysres_devclass,
677     0, 0);
678 MODULE_DEPEND(acpi_sysresource, acpi, 1, 1, 1);
679 
680 static int
681 acpi_sysres_probe(device_t dev)
682 {
683     static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
684 
685     if (acpi_disabled("sysresource") ||
686 	ACPI_ID_PROBE(device_get_parent(dev), dev, sysres_ids) == NULL)
687 	return (ENXIO);
688 
689     device_set_desc(dev, "System Resource");
690     device_quiet(dev);
691     return (BUS_PROBE_DEFAULT);
692 }
693 
694 static int
695 acpi_sysres_attach(device_t dev)
696 {
697     device_t bus;
698     struct resource_list_entry *bus_rle, *dev_rle;
699     struct resource_list *bus_rl, *dev_rl;
700     int done, type;
701     u_long start, end, count;
702 
703     /*
704      * Loop through all current resources to see if the new one overlaps
705      * any existing ones.  If so, grow the old one up and/or down
706      * accordingly.  Discard any that are wholly contained in the old.  If
707      * the resource is unique, add it to the parent.  It will later go into
708      * the rman pool.
709      */
710     bus = device_get_parent(dev);
711     dev_rl = BUS_GET_RESOURCE_LIST(bus, dev);
712     bus_rl = BUS_GET_RESOURCE_LIST(device_get_parent(bus), bus);
713     STAILQ_FOREACH(dev_rle, dev_rl, link) {
714 	if (dev_rle->type != SYS_RES_IOPORT && dev_rle->type != SYS_RES_MEMORY)
715 	    continue;
716 
717 	start = dev_rle->start;
718 	end = dev_rle->end;
719 	count = dev_rle->count;
720 	type = dev_rle->type;
721 	done = FALSE;
722 
723 	STAILQ_FOREACH(bus_rle, bus_rl, link) {
724 	    if (bus_rle->type != type)
725 		continue;
726 
727 	    /* New resource wholly contained in old, discard. */
728 	    if (start >= bus_rle->start && end <= bus_rle->end)
729 		break;
730 
731 	    /* New tail overlaps old head, grow existing resource downward. */
732 	    if (start < bus_rle->start && end >= bus_rle->start) {
733 		bus_rle->count += bus_rle->start - start;
734 		bus_rle->start = start;
735 		done = TRUE;
736 	    }
737 
738 	    /* New head overlaps old tail, grow existing resource upward. */
739 	    if (start <= bus_rle->end && end > bus_rle->end) {
740 		bus_rle->count += end - bus_rle->end;
741 		bus_rle->end = end;
742 		done = TRUE;
743 	    }
744 
745 	    /* If we adjusted the old resource, we're finished. */
746 	    if (done)
747 		break;
748 	}
749 
750 	/* If we didn't merge with anything, add this resource. */
751 	if (bus_rle == NULL)
752 	    bus_set_resource(bus, type, acpi_sysres_rid++, start, count);
753     }
754 
755     /* After merging/moving resources to the parent, free the list. */
756     resource_list_free(dev_rl);
757 
758     return (0);
759 }
760