1#- 2# Copyright (c) 1998-2004 Doug Rabson 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24# SUCH DAMAGE. 25# 26# $FreeBSD$ 27# 28 29#include <sys/types.h> 30#include <sys/systm.h> 31#include <sys/bus.h> 32 33/** 34 * @defgroup BUS bus - KObj methods for drivers of devices with children 35 * @brief A set of methods required device drivers that support 36 * child devices. 37 * @{ 38 */ 39INTERFACE bus; 40 41# 42# Default implementations of some methods. 43# 44CODE { 45 static struct resource * 46 null_alloc_resource(device_t dev, device_t child, 47 int type, int *rid, rman_res_t start, rman_res_t end, 48 rman_res_t count, u_int flags) 49 { 50 return (0); 51 } 52 53 static int 54 null_remap_intr(device_t bus, device_t dev, u_int irq) 55 { 56 57 if (dev != NULL) 58 return (BUS_REMAP_INTR(dev, NULL, irq)); 59 return (ENXIO); 60 } 61 62 static device_t 63 null_add_child(device_t bus, int order, const char *name, 64 int unit) 65 { 66 67 panic("bus_add_child is not implemented"); 68 } 69}; 70 71/** 72 * @brief Print a description of a child device 73 * 74 * This is called from system code which prints out a description of a 75 * device. It should describe the attachment that the child has with 76 * the parent. For instance the TurboLaser bus prints which node the 77 * device is attached to. See bus_generic_print_child() for more 78 * information. 79 * 80 * @param _dev the device whose child is being printed 81 * @param _child the child device to describe 82 * 83 * @returns the number of characters output. 84 */ 85METHOD int print_child { 86 device_t _dev; 87 device_t _child; 88} DEFAULT bus_generic_print_child; 89 90/** 91 * @brief Print a notification about an unprobed child device. 92 * 93 * Called for each child device that did not succeed in probing for a 94 * driver. 95 * 96 * @param _dev the device whose child was being probed 97 * @param _child the child device which failed to probe 98 */ 99METHOD void probe_nomatch { 100 device_t _dev; 101 device_t _child; 102}; 103 104/** 105 * @brief Read the value of a bus-specific attribute of a device 106 * 107 * This method, along with BUS_WRITE_IVAR() manages a bus-specific set 108 * of instance variables of a child device. The intention is that 109 * each different type of bus defines a set of appropriate instance 110 * variables (such as ports and irqs for ISA bus etc.) 111 * 112 * This information could be given to the child device as a struct but 113 * that makes it hard for a bus to add or remove variables without 114 * forcing an edit and recompile for all drivers which may not be 115 * possible for vendor supplied binary drivers. 116 * 117 * This method copies the value of an instance variable to the 118 * location specified by @p *_result. 119 * 120 * @param _dev the device whose child was being examined 121 * @param _child the child device whose instance variable is 122 * being read 123 * @param _index the instance variable to read 124 * @param _result a location to receive the instance variable 125 * value 126 * 127 * @retval 0 success 128 * @retval ENOENT no such instance variable is supported by @p 129 * _dev 130 */ 131METHOD int read_ivar { 132 device_t _dev; 133 device_t _child; 134 int _index; 135 uintptr_t *_result; 136}; 137 138/** 139 * @brief Write the value of a bus-specific attribute of a device 140 * 141 * This method sets the value of an instance variable to @p _value. 142 * 143 * @param _dev the device whose child was being updated 144 * @param _child the child device whose instance variable is 145 * being written 146 * @param _index the instance variable to write 147 * @param _value the value to write to that instance variable 148 * 149 * @retval 0 success 150 * @retval ENOENT no such instance variable is supported by @p 151 * _dev 152 * @retval EINVAL the instance variable was recognised but 153 * contains a read-only value 154 */ 155METHOD int write_ivar { 156 device_t _dev; 157 device_t _child; 158 int _indx; 159 uintptr_t _value; 160}; 161 162/** 163 * @brief Notify a bus that a child was deleted 164 * 165 * Called at the beginning of device_delete_child() to allow the parent 166 * to teardown any bus-specific state for the child. 167 * 168 * @param _dev the device whose child is being deleted 169 * @param _child the child device which is being deleted 170 */ 171METHOD void child_deleted { 172 device_t _dev; 173 device_t _child; 174}; 175 176/** 177 * @brief Notify a bus that a child was detached 178 * 179 * Called after the child's DEVICE_DETACH() method to allow the parent 180 * to reclaim any resources allocated on behalf of the child. 181 * 182 * @param _dev the device whose child changed state 183 * @param _child the child device which changed state 184 */ 185METHOD void child_detached { 186 device_t _dev; 187 device_t _child; 188}; 189 190/** 191 * @brief Notify a bus that a new driver was added 192 * 193 * Called when a new driver is added to the devclass which owns this 194 * bus. The generic implementation of this method attempts to probe and 195 * attach any un-matched children of the bus. 196 * 197 * @param _dev the device whose devclass had a new driver 198 * added to it 199 * @param _driver the new driver which was added 200 */ 201METHOD void driver_added { 202 device_t _dev; 203 driver_t *_driver; 204} DEFAULT bus_generic_driver_added; 205 206/** 207 * @brief Create a new child device 208 * 209 * For buses which use use drivers supporting DEVICE_IDENTIFY() to 210 * enumerate their devices, this method is used to create new 211 * device instances. The new device will be added after the last 212 * existing child with the same order. Implementations of bus_add_child 213 * call device_add_child_ordered to add the child and often add 214 * a suitable ivar to the device specific to that bus. 215 * 216 * @param _dev the bus device which will be the parent of the 217 * new child device 218 * @param _order a value which is used to partially sort the 219 * children of @p _dev - devices created using 220 * lower values of @p _order appear first in @p 221 * _dev's list of children 222 * @param _name devclass name for new device or @c NULL if not 223 * specified 224 * @param _unit unit number for new device or @c -1 if not 225 * specified 226 */ 227METHOD device_t add_child { 228 device_t _dev; 229 u_int _order; 230 const char *_name; 231 int _unit; 232} DEFAULT null_add_child; 233 234/** 235 * @brief Rescan the bus 236 * 237 * This method is called by a parent bridge or devctl to trigger a bus 238 * rescan. The rescan should delete devices no longer present and 239 * enumerate devices that have newly arrived. 240 * 241 * @param _dev the bus device 242 */ 243METHOD int rescan { 244 device_t _dev; 245} 246 247/** 248 * @brief Allocate a system resource 249 * 250 * This method is called by child devices of a bus to allocate resources. 251 * The types are defined in <machine/resource.h>; the meaning of the 252 * resource-ID field varies from bus to bus (but @p *rid == 0 is always 253 * valid if the resource type is). If a resource was allocated and the 254 * caller did not use the RF_ACTIVE to specify that it should be 255 * activated immediately, the caller is responsible for calling 256 * BUS_ACTIVATE_RESOURCE() when it actually uses the resource. 257 * 258 * @param _dev the parent device of @p _child 259 * @param _child the device which is requesting an allocation 260 * @param _type the type of resource to allocate 261 * @param _rid a pointer to the resource identifier 262 * @param _start hint at the start of the resource range - pass 263 * @c 0 for any start address 264 * @param _end hint at the end of the resource range - pass 265 * @c ~0 for any end address 266 * @param _count hint at the size of range required - pass @c 1 267 * for any size 268 * @param _flags any extra flags to control the resource 269 * allocation - see @c RF_XXX flags in 270 * <sys/rman.h> for details 271 * 272 * @returns the resource which was allocated or @c NULL if no 273 * resource could be allocated 274 */ 275METHOD struct resource * alloc_resource { 276 device_t _dev; 277 device_t _child; 278 int _type; 279 int *_rid; 280 rman_res_t _start; 281 rman_res_t _end; 282 rman_res_t _count; 283 u_int _flags; 284} DEFAULT null_alloc_resource; 285 286/** 287 * @brief Activate a resource 288 * 289 * Activate a resource previously allocated with 290 * BUS_ALLOC_RESOURCE(). This may enable decoding of this resource in a 291 * device for instance. It will also establish a mapping for the resource 292 * unless RF_UNMAPPED was set when allocating the resource. 293 * 294 * @param _dev the parent device of @p _child 295 * @param _child the device which allocated the resource 296 * @param _type the type of resource 297 * @param _rid the resource identifier 298 * @param _r the resource to activate 299 */ 300METHOD int activate_resource { 301 device_t _dev; 302 device_t _child; 303 int _type; 304 int _rid; 305 struct resource *_r; 306}; 307 308 309/** 310 * @brief Map a resource 311 * 312 * Allocate a mapping for a range of an active resource. The mapping 313 * is described by a struct resource_map object. This may for instance 314 * map a memory region into the kernel's virtual address space. 315 * 316 * @param _dev the parent device of @p _child 317 * @param _child the device which allocated the resource 318 * @param _type the type of resource 319 * @param _r the resource to map 320 * @param _args optional attributes of the mapping 321 * @param _map the mapping 322 */ 323METHOD int map_resource { 324 device_t _dev; 325 device_t _child; 326 int _type; 327 struct resource *_r; 328 struct resource_map_request *_args; 329 struct resource_map *_map; 330} DEFAULT bus_generic_map_resource; 331 332 333/** 334 * @brief Unmap a resource 335 * 336 * Release a mapping previously allocated with 337 * BUS_MAP_RESOURCE(). This may for instance unmap a memory region 338 * from the kernel's virtual address space. 339 * 340 * @param _dev the parent device of @p _child 341 * @param _child the device which allocated the resource 342 * @param _type the type of resource 343 * @param _r the resource 344 * @param _map the mapping to release 345 */ 346METHOD int unmap_resource { 347 device_t _dev; 348 device_t _child; 349 int _type; 350 struct resource *_r; 351 struct resource_map *_map; 352} DEFAULT bus_generic_unmap_resource; 353 354 355/** 356 * @brief Deactivate a resource 357 * 358 * Deactivate a resource previously allocated with 359 * BUS_ALLOC_RESOURCE(). 360 * 361 * @param _dev the parent device of @p _child 362 * @param _child the device which allocated the resource 363 * @param _type the type of resource 364 * @param _rid the resource identifier 365 * @param _r the resource to deactivate 366 */ 367METHOD int deactivate_resource { 368 device_t _dev; 369 device_t _child; 370 int _type; 371 int _rid; 372 struct resource *_r; 373}; 374 375/** 376 * @brief Adjust a resource 377 * 378 * Adjust the start and/or end of a resource allocated by 379 * BUS_ALLOC_RESOURCE. At least part of the new address range must overlap 380 * with the existing address range. If the successful, the resource's range 381 * will be adjusted to [start, end] on return. 382 * 383 * @param _dev the parent device of @p _child 384 * @param _child the device which allocated the resource 385 * @param _type the type of resource 386 * @param _res the resource to adjust 387 * @param _start the new starting address of the resource range 388 * @param _end the new ending address of the resource range 389 */ 390METHOD int adjust_resource { 391 device_t _dev; 392 device_t _child; 393 int _type; 394 struct resource *_res; 395 rman_res_t _start; 396 rman_res_t _end; 397}; 398 399/** 400 * @brief Release a resource 401 * 402 * Free a resource allocated by the BUS_ALLOC_RESOURCE. The @p _rid 403 * value must be the same as the one returned by BUS_ALLOC_RESOURCE() 404 * (which is not necessarily the same as the one the client passed). 405 * 406 * @param _dev the parent device of @p _child 407 * @param _child the device which allocated the resource 408 * @param _type the type of resource 409 * @param _rid the resource identifier 410 * @param _r the resource to release 411 */ 412METHOD int release_resource { 413 device_t _dev; 414 device_t _child; 415 int _type; 416 int _rid; 417 struct resource *_res; 418}; 419 420/** 421 * @brief Install an interrupt handler 422 * 423 * This method is used to associate an interrupt handler function with 424 * an irq resource. When the interrupt triggers, the function @p _intr 425 * will be called with the value of @p _arg as its single 426 * argument. The value returned in @p *_cookiep is used to cancel the 427 * interrupt handler - the caller should save this value to use in a 428 * future call to BUS_TEARDOWN_INTR(). 429 * 430 * @param _dev the parent device of @p _child 431 * @param _child the device which allocated the resource 432 * @param _irq the resource representing the interrupt 433 * @param _flags a set of bits from enum intr_type specifying 434 * the class of interrupt 435 * @param _intr the function to call when the interrupt 436 * triggers 437 * @param _arg a value to use as the single argument in calls 438 * to @p _intr 439 * @param _cookiep a pointer to a location to receive a cookie 440 * value that may be used to remove the interrupt 441 * handler 442 */ 443METHOD int setup_intr { 444 device_t _dev; 445 device_t _child; 446 struct resource *_irq; 447 int _flags; 448 driver_filter_t *_filter; 449 driver_intr_t *_intr; 450 void *_arg; 451 void **_cookiep; 452}; 453 454/** 455 * @brief Uninstall an interrupt handler 456 * 457 * This method is used to disassociate an interrupt handler function 458 * with an irq resource. The value of @p _cookie must be the value 459 * returned from a previous call to BUS_SETUP_INTR(). 460 * 461 * @param _dev the parent device of @p _child 462 * @param _child the device which allocated the resource 463 * @param _irq the resource representing the interrupt 464 * @param _cookie the cookie value returned when the interrupt 465 * was originally registered 466 */ 467METHOD int teardown_intr { 468 device_t _dev; 469 device_t _child; 470 struct resource *_irq; 471 void *_cookie; 472}; 473 474/** 475 * @brief Define a resource which can be allocated with 476 * BUS_ALLOC_RESOURCE(). 477 * 478 * This method is used by some buses (typically ISA) to allow a 479 * driver to describe a resource range that it would like to 480 * allocate. The resource defined by @p _type and @p _rid is defined 481 * to start at @p _start and to include @p _count indices in its 482 * range. 483 * 484 * @param _dev the parent device of @p _child 485 * @param _child the device which owns the resource 486 * @param _type the type of resource 487 * @param _rid the resource identifier 488 * @param _start the start of the resource range 489 * @param _count the size of the resource range 490 */ 491METHOD int set_resource { 492 device_t _dev; 493 device_t _child; 494 int _type; 495 int _rid; 496 rman_res_t _start; 497 rman_res_t _count; 498}; 499 500/** 501 * @brief Describe a resource 502 * 503 * This method allows a driver to examine the range used for a given 504 * resource without actually allocating it. 505 * 506 * @param _dev the parent device of @p _child 507 * @param _child the device which owns the resource 508 * @param _type the type of resource 509 * @param _rid the resource identifier 510 * @param _start the address of a location to receive the start 511 * index of the resource range 512 * @param _count the address of a location to receive the size 513 * of the resource range 514 */ 515METHOD int get_resource { 516 device_t _dev; 517 device_t _child; 518 int _type; 519 int _rid; 520 rman_res_t *_startp; 521 rman_res_t *_countp; 522}; 523 524/** 525 * @brief Delete a resource. 526 * 527 * Use this to delete a resource (possibly one previously added with 528 * BUS_SET_RESOURCE()). 529 * 530 * @param _dev the parent device of @p _child 531 * @param _child the device which owns the resource 532 * @param _type the type of resource 533 * @param _rid the resource identifier 534 */ 535METHOD void delete_resource { 536 device_t _dev; 537 device_t _child; 538 int _type; 539 int _rid; 540}; 541 542/** 543 * @brief Return a struct resource_list. 544 * 545 * Used by drivers which use bus_generic_rl_alloc_resource() etc. to 546 * implement their resource handling. It should return the resource 547 * list of the given child device. 548 * 549 * @param _dev the parent device of @p _child 550 * @param _child the device which owns the resource list 551 */ 552METHOD struct resource_list * get_resource_list { 553 device_t _dev; 554 device_t _child; 555} DEFAULT bus_generic_get_resource_list; 556 557/** 558 * @brief Is the hardware described by @p _child still attached to the 559 * system? 560 * 561 * This method should return 0 if the device is not present. It 562 * should return -1 if it is present. Any errors in determining 563 * should be returned as a normal errno value. Client drivers are to 564 * assume that the device is present, even if there is an error 565 * determining if it is there. Buses are to try to avoid returning 566 * errors, but newcard will return an error if the device fails to 567 * implement this method. 568 * 569 * @param _dev the parent device of @p _child 570 * @param _child the device which is being examined 571 */ 572METHOD int child_present { 573 device_t _dev; 574 device_t _child; 575} DEFAULT bus_generic_child_present; 576 577/** 578 * @brief Returns the pnp info for this device. 579 * 580 * Return it as a string. If the storage is insufficient for the 581 * string, then return EOVERFLOW. 582 * 583 * The string must be formatted as a space-separated list of 584 * name=value pairs. Names may only contain alphanumeric characters, 585 * underscores ('_') and hyphens ('-'). Values can contain any 586 * non-whitespace characters. Values containing whitespace can be 587 * quoted with double quotes ('"'). Double quotes and backslashes in 588 * quoted values can be escaped with backslashes ('\'). 589 * 590 * @param _dev the parent device of @p _child 591 * @param _child the device which is being examined 592 * @param _buf the address of a buffer to receive the pnp 593 * string 594 * @param _buflen the size of the buffer pointed to by @p _buf 595 */ 596METHOD int child_pnpinfo_str { 597 device_t _dev; 598 device_t _child; 599 char *_buf; 600 size_t _buflen; 601}; 602 603/** 604 * @brief Returns the location for this device. 605 * 606 * Return it as a string. If the storage is insufficient for the 607 * string, then return EOVERFLOW. 608 * 609 * The string must be formatted as a space-separated list of 610 * name=value pairs. Names may only contain alphanumeric characters, 611 * underscores ('_') and hyphens ('-'). Values can contain any 612 * non-whitespace characters. Values containing whitespace can be 613 * quoted with double quotes ('"'). Double quotes and backslashes in 614 * quoted values can be escaped with backslashes ('\'). 615 * 616 * @param _dev the parent device of @p _child 617 * @param _child the device which is being examined 618 * @param _buf the address of a buffer to receive the location 619 * string 620 * @param _buflen the size of the buffer pointed to by @p _buf 621 */ 622METHOD int child_location_str { 623 device_t _dev; 624 device_t _child; 625 char *_buf; 626 size_t _buflen; 627}; 628 629/** 630 * @brief Allow drivers to request that an interrupt be bound to a specific 631 * CPU. 632 * 633 * @param _dev the parent device of @p _child 634 * @param _child the device which allocated the resource 635 * @param _irq the resource representing the interrupt 636 * @param _cpu the CPU to bind the interrupt to 637 */ 638METHOD int bind_intr { 639 device_t _dev; 640 device_t _child; 641 struct resource *_irq; 642 int _cpu; 643} DEFAULT bus_generic_bind_intr; 644 645/** 646 * @brief Allow (bus) drivers to specify the trigger mode and polarity 647 * of the specified interrupt. 648 * 649 * @param _dev the bus device 650 * @param _irq the interrupt number to modify 651 * @param _trig the trigger mode required 652 * @param _pol the interrupt polarity required 653 */ 654METHOD int config_intr { 655 device_t _dev; 656 int _irq; 657 enum intr_trigger _trig; 658 enum intr_polarity _pol; 659} DEFAULT bus_generic_config_intr; 660 661/** 662 * @brief Allow drivers to associate a description with an active 663 * interrupt handler. 664 * 665 * @param _dev the parent device of @p _child 666 * @param _child the device which allocated the resource 667 * @param _irq the resource representing the interrupt 668 * @param _cookie the cookie value returned when the interrupt 669 * was originally registered 670 * @param _descr the description to associate with the interrupt 671 */ 672METHOD int describe_intr { 673 device_t _dev; 674 device_t _child; 675 struct resource *_irq; 676 void *_cookie; 677 const char *_descr; 678} DEFAULT bus_generic_describe_intr; 679 680/** 681 * @brief Notify a (bus) driver about a child that the hints mechanism 682 * believes it has discovered. 683 * 684 * The bus is responsible for then adding the child in the right order 685 * and discovering other things about the child. The bus driver is 686 * free to ignore this hint, to do special things, etc. It is all up 687 * to the bus driver to interpret. 688 * 689 * This method is only called in response to the parent bus asking for 690 * hinted devices to be enumerated. 691 * 692 * @param _dev the bus device 693 * @param _dname the name of the device w/o unit numbers 694 * @param _dunit the unit number of the device 695 */ 696METHOD void hinted_child { 697 device_t _dev; 698 const char *_dname; 699 int _dunit; 700}; 701 702/** 703 * @brief Returns bus_dma_tag_t for use w/ devices on the bus. 704 * 705 * @param _dev the parent device of @p _child 706 * @param _child the device to which the tag will belong 707 */ 708METHOD bus_dma_tag_t get_dma_tag { 709 device_t _dev; 710 device_t _child; 711} DEFAULT bus_generic_get_dma_tag; 712 713/** 714 * @brief Returns bus_space_tag_t for use w/ devices on the bus. 715 * 716 * @param _dev the parent device of @p _child 717 * @param _child the device to which the tag will belong 718 */ 719METHOD bus_space_tag_t get_bus_tag { 720 device_t _dev; 721 device_t _child; 722} DEFAULT bus_generic_get_bus_tag; 723 724/** 725 * @brief Allow the bus to determine the unit number of a device. 726 * 727 * @param _dev the parent device of @p _child 728 * @param _child the device whose unit is to be wired 729 * @param _name the name of the device's new devclass 730 * @param _unitp a pointer to the device's new unit value 731 */ 732METHOD void hint_device_unit { 733 device_t _dev; 734 device_t _child; 735 const char *_name; 736 int *_unitp; 737}; 738 739/** 740 * @brief Notify a bus that the bus pass level has been changed 741 * 742 * @param _dev the bus device 743 */ 744METHOD void new_pass { 745 device_t _dev; 746} DEFAULT bus_generic_new_pass; 747 748/** 749 * @brief Notify a bus that specified child's IRQ should be remapped. 750 * 751 * @param _dev the bus device 752 * @param _child the child device 753 * @param _irq the irq number 754 */ 755METHOD int remap_intr { 756 device_t _dev; 757 device_t _child; 758 u_int _irq; 759} DEFAULT null_remap_intr; 760 761/** 762 * @brief Suspend a given child 763 * 764 * @param _dev the parent device of @p _child 765 * @param _child the device to suspend 766 */ 767METHOD int suspend_child { 768 device_t _dev; 769 device_t _child; 770} DEFAULT bus_generic_suspend_child; 771 772/** 773 * @brief Resume a given child 774 * 775 * @param _dev the parent device of @p _child 776 * @param _child the device to resume 777 */ 778METHOD int resume_child { 779 device_t _dev; 780 device_t _child; 781} DEFAULT bus_generic_resume_child; 782 783/** 784 * @brief Get the VM domain handle for the given bus and child. 785 * 786 * @param _dev the bus device 787 * @param _child the child device 788 * @param _domain a pointer to the bus's domain handle identifier 789 */ 790METHOD int get_domain { 791 device_t _dev; 792 device_t _child; 793 int *_domain; 794} DEFAULT bus_generic_get_domain; 795 796/** 797 * @brief Request a set of CPUs 798 * 799 * @param _dev the bus device 800 * @param _child the child device 801 * @param _op type of CPUs to request 802 * @param _setsize the size of the set passed in _cpuset 803 * @param _cpuset a pointer to a cpuset to receive the requested 804 * set of CPUs 805 */ 806METHOD int get_cpus { 807 device_t _dev; 808 device_t _child; 809 enum cpu_sets _op; 810 size_t _setsize; 811 cpuset_t *_cpuset; 812} DEFAULT bus_generic_get_cpus; 813