i386 - Get completely rid of APIC_IO
[dragonfly.git] / sys / platform / pc32 / i386 / nexus.c
CommitLineData
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1/*
2 * Copyright 1998 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/i386/i386/nexus.c,v 1.26.2.10 2003/02/22 13:16:45 imp Exp $
30 */
31
32/*
33 * This code implements a `root nexus' for Intel Architecture
34 * machines. The function of the root nexus is to serve as an
35 * attachment point for both processors and buses, and to manage
36 * resources which are common to all of them. In particular,
37 * this code implements the core resource managers for interrupt
38 * requests, DMA requests (which rightfully should be a part of the
39 * ISA code but it's easier to do it here for now), I/O port addresses,
40 * and I/O memory address space.
41 */
42
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43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/bus.h>
46#include <sys/kernel.h>
47#include <sys/malloc.h>
48#include <sys/module.h>
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49#include <sys/rman.h>
50
51#include <machine/vmparam.h>
52#include <vm/vm.h>
53#include <vm/pmap.h>
54#include <machine/pmap.h>
55
2899c8b1 56#include <machine/nexusvar.h>
984263bc 57#include <machine/smp.h>
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58#include <machine_base/apic/mpapic.h>
59#include <machine_base/isa/intr_machdep.h>
984263bc 60
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61#include <bus/pci/pcivar.h>
62#include <bus/pci/pcireg.h>
63#include <bus/pci/pcibus.h>
64#include <bus/pci/pci_cfgreg.h>
65#include <bus/pci/pcib_private.h>
66
67#include "pcib_if.h"
68
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69static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
70struct nexus_device {
71 struct resource_list nx_resources;
2899c8b1 72 int nx_pcibus;
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73};
74
75#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
76
77static struct rman irq_rman, drq_rman, port_rman, mem_rman;
78
79static int nexus_probe(device_t);
80static int nexus_attach(device_t);
81static int nexus_print_all_resources(device_t dev);
82static int nexus_print_child(device_t, device_t);
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83static device_t nexus_add_child(device_t bus, device_t parent, int order,
84 const char *name, int unit);
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85static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
86 u_long, u_long, u_long, u_int);
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87static int nexus_read_ivar(device_t, device_t, int, uintptr_t *);
88static int nexus_write_ivar(device_t, device_t, int, uintptr_t);
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89static int nexus_activate_resource(device_t, device_t, int, int,
90 struct resource *);
91static int nexus_deactivate_resource(device_t, device_t, int, int,
92 struct resource *);
93static int nexus_release_resource(device_t, device_t, int, int,
94 struct resource *);
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95static int nexus_config_intr(device_t, device_t, int, enum intr_trigger,
96 enum intr_polarity);
984263bc 97static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
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98 void (*)(void *), void *,
99 void **, lwkt_serialize_t);
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100static int nexus_teardown_intr(device_t, device_t, struct resource *,
101 void *);
102static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long);
103static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *);
104static void nexus_delete_resource(device_t, device_t, int, int);
105
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106/*
107 * The device_identify method will cause nexus to automatically associate
108 * and attach to the root bus.
109 */
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110static device_method_t nexus_methods[] = {
111 /* Device interface */
39b5d600 112 DEVMETHOD(device_identify, bus_generic_identify),
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113 DEVMETHOD(device_probe, nexus_probe),
114 DEVMETHOD(device_attach, nexus_attach),
115 DEVMETHOD(device_detach, bus_generic_detach),
116 DEVMETHOD(device_shutdown, bus_generic_shutdown),
117 DEVMETHOD(device_suspend, bus_generic_suspend),
118 DEVMETHOD(device_resume, bus_generic_resume),
119
120 /* Bus interface */
121 DEVMETHOD(bus_print_child, nexus_print_child),
122 DEVMETHOD(bus_add_child, nexus_add_child),
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123 DEVMETHOD(bus_read_ivar, nexus_read_ivar),
124 DEVMETHOD(bus_write_ivar, nexus_write_ivar),
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125 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
126 DEVMETHOD(bus_release_resource, nexus_release_resource),
127 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
128 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
05065648 129 DEVMETHOD(bus_config_intr, nexus_config_intr),
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130 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
131 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
132 DEVMETHOD(bus_set_resource, nexus_set_resource),
133 DEVMETHOD(bus_get_resource, nexus_get_resource),
134 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
135
136 { 0, 0 }
137};
138
139static driver_t nexus_driver = {
140 "nexus",
141 nexus_methods,
142 1, /* no softc */
143};
144static devclass_t nexus_devclass;
145
146DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
147
148static int
149nexus_probe(device_t dev)
150{
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151 device_quiet(dev); /* suppress attach message for neatness */
152
153 /*
154 * IRQ's are on the mainboard on old systems, but on the ISA part
155 * of PCI->ISA bridges. There would be multiple sets of IRQs on
156 * multi-ISA-bus systems. PCI interrupts are routed to the ISA
157 * component, so in a way, PCI can be a partial child of an ISA bus(!).
158 * APIC interrupts are global though.
159 * In the non-APIC case, disallow the use of IRQ 2.
160 */
161 irq_rman.rm_start = 0;
162 irq_rman.rm_type = RMAN_ARRAY;
163 irq_rman.rm_descr = "Interrupt request lines";
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164
165#if SMP /* APIC-IO */
166if (apic_io_enable) {
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167 irq_rman.rm_end = APIC_INTMAPSIZE - 1;
168 if (rman_init(&irq_rman)
169 || rman_manage_region(&irq_rman,
170 irq_rman.rm_start, irq_rman.rm_end))
171 panic("nexus_probe irq_rman");
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172} else {
173#endif
984263bc 174 irq_rman.rm_end = 15;
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175 if (rman_init(&irq_rman)
176 || rman_manage_region(&irq_rman, irq_rman.rm_start, 1)
177 || rman_manage_region(&irq_rman, 3, irq_rman.rm_end))
178 panic("nexus_probe irq_rman");
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179#if SMP /* APIC-IO */
180}
984263bc 181#endif
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182 /*
183 * ISA DMA on PCI systems is implemented in the ISA part of each
184 * PCI->ISA bridge and the channels can be duplicated if there are
185 * multiple bridges. (eg: laptops with docking stations)
186 */
187 drq_rman.rm_start = 0;
984263bc 188 drq_rman.rm_end = 7;
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189 drq_rman.rm_type = RMAN_ARRAY;
190 drq_rman.rm_descr = "DMA request lines";
191 /* XXX drq 0 not available on some machines */
192 if (rman_init(&drq_rman)
193 || rman_manage_region(&drq_rman,
194 drq_rman.rm_start, drq_rman.rm_end))
195 panic("nexus_probe drq_rman");
196
197 /*
198 * However, IO ports and Memory truely are global at this level,
199 * as are APIC interrupts (however many IO APICS there turn out
200 * to be on large systems..)
201 */
202 port_rman.rm_start = 0;
203 port_rman.rm_end = 0xffff;
204 port_rman.rm_type = RMAN_ARRAY;
205 port_rman.rm_descr = "I/O ports";
206 if (rman_init(&port_rman)
207 || rman_manage_region(&port_rman, 0, 0xffff))
208 panic("nexus_probe port_rman");
209
210 mem_rman.rm_start = 0;
211 mem_rman.rm_end = ~0u;
212 mem_rman.rm_type = RMAN_ARRAY;
213 mem_rman.rm_descr = "I/O memory addresses";
214 if (rman_init(&mem_rman)
215 || rman_manage_region(&mem_rman, 0, ~0))
216 panic("nexus_probe mem_rman");
217
218 return bus_generic_probe(dev);
219}
220
221static int
222nexus_attach(device_t dev)
223{
224 device_t child;
225
226 /*
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227 * First, let our child driver's identify any child devices that
228 * they can find. Once that is done attach any devices that we
229 * found.
984263bc 230 */
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231#if 0 /* FUTURE */
232 bus_generic_probe(dev);
233#endif
984263bc 234 bus_generic_attach(dev);
41a01a4d 235
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236 /*
237 * And if we didn't see EISA or ISA on a pci bridge, create some
238 * connection points now so they show up "on motherboard".
239 */
240 if (!devclass_get_device(devclass_find("eisa"), 0)) {
2581072f 241 child = BUS_ADD_CHILD(dev, dev, 0, "eisa", 0);
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242 if (child == NULL)
243 panic("nexus_attach eisa");
244 device_probe_and_attach(child);
245 }
984263bc 246 if (!devclass_get_device(devclass_find("isa"), 0)) {
2581072f 247 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
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248 if (child == NULL)
249 panic("nexus_attach isa");
250 device_probe_and_attach(child);
251 }
252
253 return 0;
254}
255
256static int
257nexus_print_all_resources(device_t dev)
258{
259 struct nexus_device *ndev = DEVTONX(dev);
260 struct resource_list *rl = &ndev->nx_resources;
261 int retval = 0;
262
2899c8b1 263 if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1)
26be20a0 264 retval += kprintf(" at");
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265
266 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
267 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
268 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
269
270 return retval;
271}
272
273static int
274nexus_print_child(device_t bus, device_t child)
275{
2899c8b1 276 struct nexus_device *ndev = DEVTONX(child);
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277 int retval = 0;
278
279 retval += bus_print_child_header(bus, child);
280 retval += nexus_print_all_resources(child);
2899c8b1 281 if (ndev->nx_pcibus != -1)
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282 retval += kprintf(" pcibus %d", ndev->nx_pcibus);
283 retval += kprintf(" on motherboard\n");
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284
285 return (retval);
286}
287
288static device_t
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289nexus_add_child(device_t bus, device_t parent, int order,
290 const char *name, int unit)
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291{
292 device_t child;
293 struct nexus_device *ndev;
294
efda3bd0 295 ndev = kmalloc(sizeof(struct nexus_device), M_NEXUSDEV, M_INTWAIT|M_ZERO);
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296 if (!ndev)
297 return(0);
298 resource_list_init(&ndev->nx_resources);
2899c8b1 299 ndev->nx_pcibus = -1;
984263bc 300
2581072f 301 child = device_add_child_ordered(parent, order, name, unit);
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302
303 /* should we free this in nexus_child_detached? */
304 device_set_ivars(child, ndev);
305
306 return(child);
307}
308
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309static int
310nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
311{
312 struct nexus_device *ndev = DEVTONX(child);
313
314 switch (which) {
315 case NEXUS_IVAR_PCIBUS:
316 *result = ndev->nx_pcibus;
317 break;
318 default:
319 return ENOENT;
320 }
321 return 0;
322}
323
324static int
325nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
326{
327 struct nexus_device *ndev = DEVTONX(child);
328
329 switch (which) {
330 case NEXUS_IVAR_PCIBUS:
331 ndev->nx_pcibus = value;
332 break;
333 default:
334 return ENOENT;
335 }
336 return 0;
337}
338
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339/*
340 * Allocate a resource on behalf of child. NB: child is usually going to be a
341 * child of one of our descendants, not a direct child of nexus0.
342 * (Exceptions include npx.)
343 */
344static struct resource *
345nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
346 u_long start, u_long end, u_long count, u_int flags)
347{
348 struct nexus_device *ndev = DEVTONX(child);
349 struct resource *rv;
350 struct resource_list_entry *rle;
351 struct rman *rm;
352 int needactivate = flags & RF_ACTIVE;
353
354 /*
355 * If this is an allocation of the "default" range for a given RID, and
356 * we know what the resources for this device are (ie. they aren't maintained
357 * by a child bus), then work out the start/end values.
358 */
359 if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
360 if (ndev == NULL)
361 return(NULL);
362 rle = resource_list_find(&ndev->nx_resources, type, *rid);
363 if (rle == NULL)
364 return(NULL);
365 start = rle->start;
366 end = rle->end;
367 count = rle->count;
368 }
369
370 flags &= ~RF_ACTIVE;
371
372 switch (type) {
373 case SYS_RES_IRQ:
374 rm = &irq_rman;
375 break;
376
377 case SYS_RES_DRQ:
378 rm = &drq_rman;
379 break;
380
381 case SYS_RES_IOPORT:
382 rm = &port_rman;
383 break;
384
385 case SYS_RES_MEMORY:
386 rm = &mem_rman;
387 break;
388
389 default:
390 return 0;
391 }
392
393 rv = rman_reserve_resource(rm, start, end, count, flags, child);
394 if (rv == 0)
395 return 0;
396
397 if (type == SYS_RES_MEMORY) {
398 rman_set_bustag(rv, I386_BUS_SPACE_MEM);
399 } else if (type == SYS_RES_IOPORT) {
400 rman_set_bustag(rv, I386_BUS_SPACE_IO);
984263bc 401 rman_set_bushandle(rv, rv->r_start);
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402 }
403
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404 if (needactivate) {
405 if (bus_activate_resource(child, type, *rid, rv)) {
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406 rman_release_resource(rv);
407 return 0;
408 }
409 }
410
411 return rv;
412}
413
414static int
415nexus_activate_resource(device_t bus, device_t child, int type, int rid,
416 struct resource *r)
417{
418 /*
419 * If this is a memory resource, map it into the kernel.
420 */
421 if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) {
422 caddr_t vaddr = 0;
423
778931ae 424 if (rman_get_end(r) < 1024 * 1024) {
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425 /*
426 * The first 1Mb is mapped at KERNBASE.
427 */
778931ae 428 vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r));
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429 } else {
430 u_int32_t paddr;
431 u_int32_t psize;
432 u_int32_t poffs;
433
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434 paddr = rman_get_start(r);
435 psize = rman_get_size(r);
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436
437 poffs = paddr - trunc_page(paddr);
438 vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs;
439 }
440 rman_set_virtual(r, vaddr);
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441 /* IBM-PC: the type of bus_space_handle_t is u_int */
442 rman_set_bushandle(r, (bus_space_handle_t) vaddr);
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443 }
444 return (rman_activate_resource(r));
445}
446
447static int
448nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
449 struct resource *r)
450{
451 /*
452 * If this is a memory resource, unmap it.
453 */
778931ae
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454 if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) &&
455 (rman_get_end(r) >= 1024 * 1024)) {
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456 u_int32_t psize;
457
778931ae 458 psize = rman_get_size(r);
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459 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize);
460 }
461
462 return (rman_deactivate_resource(r));
463}
464
465static int
466nexus_release_resource(device_t bus, device_t child, int type, int rid,
467 struct resource *r)
468{
778931ae 469 if (rman_get_flags(r) & RF_ACTIVE) {
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470 int error = bus_deactivate_resource(child, type, rid, r);
471 if (error)
472 return error;
473 }
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474 return (rman_release_resource(r));
475}
476
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477
478static int
479nexus_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig,
480 enum intr_polarity pol)
481{
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482#ifdef SMP /* APIC-IO */
483if (apic_io_enable) {
47ce2ca6 484 int line;
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485 int slot = pci_get_slot(child);
486 int bus = pci_get_bus(child);
487 int pin = irq + 1;
53191b78 488 line = pci_apic_irq(bus, slot, pin);
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489 if(line >= 0)
490 return line;
491 line = isa_apic_irq(pci_get_irq(child));
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492 if(line >= 0)
493 return line;
494
53191b78 495 return PCI_INVALID_IRQ;
79b62055 496}
47ce2ca6 497#endif
79b62055 498 return irq;
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499}
500
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501/*
502 * Currently this uses the really grody interface from kern/kern_intr.c
503 * (which really doesn't belong in kern/anything.c). Eventually, all of
504 * the code in kern_intr.c and machdep_intr.c should get moved here, since
505 * this is going to be the official interface.
506 */
507static int
508nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
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509 int flags, void (*ihand)(void *), void *arg,
510 void **cookiep, lwkt_serialize_t serializer)
984263bc 511{
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512 int error, icflags;
513
514 /* somebody tried to setup an irq that failed to allocate! */
515 if (irq == NULL)
516 panic("nexus_setup_intr: NULL irq resource!");
517
518 *cookiep = 0;
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519 icflags = flags;
520 if ((irq->r_flags & RF_SHAREABLE) == 0)
521 icflags |= INTR_EXCL;
984263bc 522
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523 /*
524 * We depend here on rman_activate_resource() being idempotent.
525 */
526 error = rman_activate_resource(irq);
527 if (error)
528 return (error);
529
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530 /*
531 * XXX cast the interrupt handler function to an inthand2_t. The
532 * difference is that an additional frame argument is passed which
533 * we do not currently want to expose the BUS subsystem to.
534 */
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535 *cookiep = register_int(irq->r_start, (inthand2_t *)ihand, arg,
536 device_get_nameunit(child), serializer,
537 icflags);
984263bc 538 if (*cookiep == NULL)
9d522d14 539 error = EINVAL;
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540 return (error);
541}
542
543static int
544nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
545{
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546 if (ih) {
547 unregister_int(ih);
548 return (0);
549 }
550 return(-1);
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551}
552
553static int
554nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
555{
556 struct nexus_device *ndev = DEVTONX(child);
557 struct resource_list *rl = &ndev->nx_resources;
558
559 /* XXX this should return a success/failure indicator */
560 resource_list_add(rl, type, rid, start, start + count - 1, count);
561 return(0);
562}
563
564static int
565nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
566{
567 struct nexus_device *ndev = DEVTONX(child);
568 struct resource_list *rl = &ndev->nx_resources;
569 struct resource_list_entry *rle;
570
571 rle = resource_list_find(rl, type, rid);
572 device_printf(child, "type %d rid %d startp %p countp %p - got %p\n",
573 type, rid, startp, countp, rle);
574 if (!rle)
575 return(ENOENT);
576 if (startp)
577 *startp = rle->start;
578 if (countp)
579 *countp = rle->count;
580 return(0);
581}
582
583static void
584nexus_delete_resource(device_t dev, device_t child, int type, int rid)
585{
586 struct nexus_device *ndev = DEVTONX(child);
587 struct resource_list *rl = &ndev->nx_resources;
588
589 resource_list_delete(rl, type, rid);
590}
9713df24 591