x86_64: apic/mpapic.h -> apic/lapic.h
[dragonfly.git] / sys / platform / pc64 / x86_64 / nexus.c
CommitLineData
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1/*
2 * Copyright 1998 Massachusetts Institute of Technology
3 * Copyright (c) 2008 The DragonFly Project.
4 *
5 * Permission to use, copy, modify, and distribute this software and
6 * its documentation for any purpose and without fee is hereby
7 * granted, provided that both the above copyright notice and this
8 * permission notice appear in all copies, that both the above
9 * copyright notice and this permission notice appear in all
10 * supporting documentation, and that the name of M.I.T. not be used
11 * in advertising or publicity pertaining to distribution of the
12 * software without specific, written prior permission. M.I.T. makes
13 * no representations about the suitability of this software for any
14 * purpose. It is provided "as is" without express or implied
15 * warranty.
16 *
17 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
18 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
21 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
27 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD: src/sys/i386/i386/nexus.c,v 1.26.2.10 2003/02/22 13:16:45 imp Exp $
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31 */
32
33/*
34 * This code implements a `root nexus' for Intel Architecture
35 * machines. The function of the root nexus is to serve as an
36 * attachment point for both processors and buses, and to manage
37 * resources which are common to all of them. In particular,
38 * this code implements the core resource managers for interrupt
39 * requests, DMA requests (which rightfully should be a part of the
40 * ISA code but it's easier to do it here for now), I/O port addresses,
41 * and I/O memory address space.
42 */
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/bus.h>
47#include <sys/kernel.h>
48#include <sys/malloc.h>
49#include <sys/module.h>
50#include <sys/rman.h>
1b505979 51#include <sys/interrupt.h>
bef055ab 52#include <sys/machintr.h>
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53
54#include <machine/vmparam.h>
55#include <vm/vm.h>
56#include <vm/pmap.h>
57#include <machine/pmap.h>
58
59#include <machine/nexusvar.h>
60#include <machine/smp.h>
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61
62#define I386_BUS_SPACE_IO 0 /* space is i/o space */
63#define I386_BUS_SPACE_MEM 1 /* space is mem space */
64
65static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
66struct nexus_device {
67 struct resource_list nx_resources;
68 int nx_pcibus;
69};
70
71#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
72
73static struct rman irq_rman, drq_rman, port_rman, mem_rman;
74
75static int nexus_probe(device_t);
76static int nexus_attach(device_t);
77static int nexus_print_all_resources(device_t dev);
78static int nexus_print_child(device_t, device_t);
79static device_t nexus_add_child(device_t bus, device_t parent, int order,
80 const char *name, int unit);
81static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
82 u_long, u_long, u_long, u_int);
83static int nexus_read_ivar(device_t, device_t, int, uintptr_t *);
84static int nexus_write_ivar(device_t, device_t, int, uintptr_t);
85static int nexus_activate_resource(device_t, device_t, int, int,
86 struct resource *);
87static int nexus_deactivate_resource(device_t, device_t, int, int,
88 struct resource *);
89static int nexus_release_resource(device_t, device_t, int, int,
90 struct resource *);
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91static int nexus_config_intr(device_t, device_t, int, enum intr_trigger,
92 enum intr_polarity);
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93static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
94 void (*)(void *), void *,
95 void **, lwkt_serialize_t);
96static int nexus_teardown_intr(device_t, device_t, struct resource *,
97 void *);
98static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long);
99static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *);
100static void nexus_delete_resource(device_t, device_t, int, int);
101
102/*
103 * The device_identify method will cause nexus to automatically associate
104 * and attach to the root bus.
105 */
106static device_method_t nexus_methods[] = {
107 /* Device interface */
108 DEVMETHOD(device_identify, bus_generic_identify),
109 DEVMETHOD(device_probe, nexus_probe),
110 DEVMETHOD(device_attach, nexus_attach),
111 DEVMETHOD(device_detach, bus_generic_detach),
112 DEVMETHOD(device_shutdown, bus_generic_shutdown),
113 DEVMETHOD(device_suspend, bus_generic_suspend),
114 DEVMETHOD(device_resume, bus_generic_resume),
115
116 /* Bus interface */
117 DEVMETHOD(bus_print_child, nexus_print_child),
118 DEVMETHOD(bus_add_child, nexus_add_child),
119 DEVMETHOD(bus_read_ivar, nexus_read_ivar),
120 DEVMETHOD(bus_write_ivar, nexus_write_ivar),
121 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
122 DEVMETHOD(bus_release_resource, nexus_release_resource),
123 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
124 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
bef055ab 125 DEVMETHOD(bus_config_intr, nexus_config_intr),
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126 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
127 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
128 DEVMETHOD(bus_set_resource, nexus_set_resource),
129 DEVMETHOD(bus_get_resource, nexus_get_resource),
130 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
131
132 { 0, 0 }
133};
134
135static driver_t nexus_driver = {
136 "nexus",
137 nexus_methods,
138 1, /* no softc */
139};
140static devclass_t nexus_devclass;
141
142DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
143
144static int
145nexus_probe(device_t dev)
146{
147 device_quiet(dev); /* suppress attach message for neatness */
148
149 /*
150 * IRQ's are on the mainboard on old systems, but on the ISA part
151 * of PCI->ISA bridges. There would be multiple sets of IRQs on
152 * multi-ISA-bus systems. PCI interrupts are routed to the ISA
153 * component, so in a way, PCI can be a partial child of an ISA bus(!).
154 * APIC interrupts are global though.
155 * In the non-APIC case, disallow the use of IRQ 2.
156 */
157 irq_rman.rm_start = 0;
158 irq_rman.rm_type = RMAN_ARRAY;
159 irq_rman.rm_descr = "Interrupt request lines";
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160#ifdef SMP /* APIC-IO */
161if (apic_io_enable) {
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162 irq_rman.rm_end = APIC_INTMAPSIZE - 1;
163 if (rman_init(&irq_rman)
164 || rman_manage_region(&irq_rman,
165 irq_rman.rm_start, irq_rman.rm_end))
166 panic("nexus_probe irq_rman");
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167} else {
168#endif
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169 irq_rman.rm_end = 15;
170 if (rman_init(&irq_rman)
171 || rman_manage_region(&irq_rman, irq_rman.rm_start, 1)
172 || rman_manage_region(&irq_rman, 3, irq_rman.rm_end))
173 panic("nexus_probe irq_rman");
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174#ifdef SMP /* APIC-IO */
175}
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176#endif
177
178 /*
179 * ISA DMA on PCI systems is implemented in the ISA part of each
180 * PCI->ISA bridge and the channels can be duplicated if there are
181 * multiple bridges. (eg: laptops with docking stations)
182 */
183 drq_rman.rm_start = 0;
184 drq_rman.rm_end = 7;
185 drq_rman.rm_type = RMAN_ARRAY;
186 drq_rman.rm_descr = "DMA request lines";
187 /* XXX drq 0 not available on some machines */
188 if (rman_init(&drq_rman)
189 || rman_manage_region(&drq_rman,
190 drq_rman.rm_start, drq_rman.rm_end))
191 panic("nexus_probe drq_rman");
192
193 /*
194 * However, IO ports and Memory truely are global at this level,
195 * as are APIC interrupts (however many IO APICS there turn out
196 * to be on large systems..)
197 */
198 port_rman.rm_start = 0;
199 port_rman.rm_end = 0xffff;
200 port_rman.rm_type = RMAN_ARRAY;
201 port_rman.rm_descr = "I/O ports";
202 if (rman_init(&port_rman)
203 || rman_manage_region(&port_rman, 0, 0xffff))
204 panic("nexus_probe port_rman");
205
206 mem_rman.rm_start = 0;
207 mem_rman.rm_end = ~0u;
208 mem_rman.rm_type = RMAN_ARRAY;
209 mem_rman.rm_descr = "I/O memory addresses";
210 if (rman_init(&mem_rman)
211 || rman_manage_region(&mem_rman, 0, ~0))
212 panic("nexus_probe mem_rman");
213
214 return bus_generic_probe(dev);
215}
216
217static int
218nexus_attach(device_t dev)
219{
220 device_t child;
221
222 /*
223 * First, let our child driver's identify any child devices that
224 * they can find. Once that is done attach any devices that we
225 * found.
226 */
227#if 0 /* FUTURE */
228 bus_generic_probe(dev);
229#endif
230 bus_generic_attach(dev);
231
232 /*
233 * And if we didn't see EISA or ISA on a pci bridge, create some
234 * connection points now so they show up "on motherboard".
235 */
236 if (!devclass_get_device(devclass_find("eisa"), 0)) {
237 child = BUS_ADD_CHILD(dev, dev, 0, "eisa", 0);
238 if (child == NULL)
239 panic("nexus_attach eisa");
240 device_probe_and_attach(child);
241 }
242 if (!devclass_get_device(devclass_find("isa"), 0)) {
243 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
244 if (child == NULL)
245 panic("nexus_attach isa");
246 device_probe_and_attach(child);
247 }
248
249 return 0;
250}
251
252static int
253nexus_print_all_resources(device_t dev)
254{
255 struct nexus_device *ndev = DEVTONX(dev);
256 struct resource_list *rl = &ndev->nx_resources;
257 int retval = 0;
258
259 if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1)
260 retval += kprintf(" at");
261
262 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
263 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
264 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
265
266 return retval;
267}
268
269static int
270nexus_print_child(device_t bus, device_t child)
271{
272 struct nexus_device *ndev = DEVTONX(child);
273 int retval = 0;
274
275 retval += bus_print_child_header(bus, child);
276 retval += nexus_print_all_resources(child);
277 if (ndev->nx_pcibus != -1)
278 retval += kprintf(" pcibus %d", ndev->nx_pcibus);
279 retval += kprintf(" on motherboard\n");
280
281 return (retval);
282}
283
284static device_t
285nexus_add_child(device_t bus, device_t parent, int order,
286 const char *name, int unit)
287{
288 device_t child;
289 struct nexus_device *ndev;
290
291 ndev = kmalloc(sizeof(struct nexus_device), M_NEXUSDEV, M_INTWAIT|M_ZERO);
292 if (!ndev)
293 return(0);
294 resource_list_init(&ndev->nx_resources);
295 ndev->nx_pcibus = -1;
296
297 child = device_add_child_ordered(parent, order, name, unit);
298
299 /* should we free this in nexus_child_detached? */
300 device_set_ivars(child, ndev);
301
302 return(child);
303}
304
305static int
306nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
307{
308 struct nexus_device *ndev = DEVTONX(child);
309
310 switch (which) {
311 case NEXUS_IVAR_PCIBUS:
312 *result = ndev->nx_pcibus;
313 break;
314 default:
315 return ENOENT;
316 }
317 return 0;
318}
319
320static int
321nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
322{
323 struct nexus_device *ndev = DEVTONX(child);
324
325 switch (which) {
326 case NEXUS_IVAR_PCIBUS:
327 ndev->nx_pcibus = value;
328 break;
329 default:
330 return ENOENT;
331 }
332 return 0;
333}
334
335/*
336 * Allocate a resource on behalf of child. NB: child is usually going to be a
337 * child of one of our descendants, not a direct child of nexus0.
338 * (Exceptions include npx.)
339 */
340static struct resource *
341nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
342 u_long start, u_long end, u_long count, u_int flags)
343{
344 struct nexus_device *ndev = DEVTONX(child);
345 struct resource *rv;
346 struct resource_list_entry *rle;
347 struct rman *rm;
348 int needactivate = flags & RF_ACTIVE;
349
350 /*
351 * If this is an allocation of the "default" range for a given RID, and
352 * we know what the resources for this device are (ie. they aren't maintained
353 * by a child bus), then work out the start/end values.
354 */
355 if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
356 if (ndev == NULL)
357 return(NULL);
358 rle = resource_list_find(&ndev->nx_resources, type, *rid);
359 if (rle == NULL)
360 return(NULL);
361 start = rle->start;
362 end = rle->end;
363 count = rle->count;
364 }
365
366 flags &= ~RF_ACTIVE;
367
368 switch (type) {
369 case SYS_RES_IRQ:
370 rm = &irq_rman;
371 break;
372
373 case SYS_RES_DRQ:
374 rm = &drq_rman;
375 break;
376
377 case SYS_RES_IOPORT:
378 rm = &port_rman;
379 break;
380
381 case SYS_RES_MEMORY:
382 rm = &mem_rman;
383 break;
384
385 default:
386 return 0;
387 }
388
389 rv = rman_reserve_resource(rm, start, end, count, flags, child);
390 if (rv == 0)
391 return 0;
392
393 if (type == SYS_RES_MEMORY) {
394 rman_set_bustag(rv, I386_BUS_SPACE_MEM);
395 } else if (type == SYS_RES_IOPORT) {
396 rman_set_bustag(rv, I386_BUS_SPACE_IO);
397 rman_set_bushandle(rv, rv->r_start);
398 }
399
400 if (needactivate) {
401 if (bus_activate_resource(child, type, *rid, rv)) {
402 rman_release_resource(rv);
403 return 0;
404 }
405 }
406
407 return rv;
408}
409
410static int
411nexus_activate_resource(device_t bus, device_t child, int type, int rid,
412 struct resource *r)
413{
414 /*
415 * If this is a memory resource, map it into the kernel.
416 */
417 if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) {
418 caddr_t vaddr = 0;
419
420 if (rman_get_end(r) < 1024 * 1024) {
421 /*
422 * The first 1Mb is mapped at KERNBASE.
423 */
424 vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r));
425 } else {
426 u_int64_t paddr;
427 u_int64_t psize;
428 u_int32_t poffs;
429
430 paddr = rman_get_start(r);
431 psize = rman_get_size(r);
432
433 poffs = paddr - trunc_page(paddr);
434 vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs;
435 }
436 rman_set_virtual(r, vaddr);
437 /* IBM-PC: the type of bus_space_handle_t is u_int */
438 rman_set_bushandle(r, (bus_space_handle_t) vaddr);
439 }
440 return (rman_activate_resource(r));
441}
442
443static int
444nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
445 struct resource *r)
446{
447 /*
448 * If this is a memory resource, unmap it.
449 */
450 if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) &&
451 (rman_get_end(r) >= 1024 * 1024)) {
452 u_int32_t psize;
453
454 psize = rman_get_size(r);
455 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize);
456 }
457
458 return (rman_deactivate_resource(r));
459}
460
461static int
462nexus_release_resource(device_t bus, device_t child, int type, int rid,
463 struct resource *r)
464{
465 if (rman_get_flags(r) & RF_ACTIVE) {
466 int error = bus_deactivate_resource(child, type, rid, r);
467 if (error)
468 return error;
469 }
470 return (rman_release_resource(r));
471}
472
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473static int
474nexus_config_intr(device_t bus, device_t chile, int irq,
475 enum intr_trigger trig, enum intr_polarity pola)
476{
477 machintr_intr_config(irq, trig, pola);
478 return 0;
479}
480
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481/*
482 * Currently this uses the really grody interface from kern/kern_intr.c
483 * (which really doesn't belong in kern/anything.c). Eventually, all of
484 * the code in kern_intr.c and machdep_intr.c should get moved here, since
485 * this is going to be the official interface.
486 */
487static int
488nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
489 int flags, void (*ihand)(void *), void *arg,
490 void **cookiep, lwkt_serialize_t serializer)
491{
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492 int error, icflags;
493
494 /* somebody tried to setup an irq that failed to allocate! */
495 if (irq == NULL)
496 panic("nexus_setup_intr: NULL irq resource!");
497
498 *cookiep = 0;
499 icflags = flags;
500 if ((irq->r_flags & RF_SHAREABLE) == 0)
501 icflags |= INTR_EXCL;
502
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503 /*
504 * We depend here on rman_activate_resource() being idempotent.
505 */
506 error = rman_activate_resource(irq);
507 if (error)
508 return (error);
509
510 /*
511 * XXX cast the interrupt handler function to an inthand2_t. The
512 * difference is that an additional frame argument is passed which
513 * we do not currently want to expose the BUS subsystem to.
514 */
515 *cookiep = register_int(irq->r_start, (inthand2_t *)ihand, arg,
516 device_get_nameunit(child), serializer,
517 icflags);
518 if (*cookiep == NULL)
519 error = EINVAL;
520 return (error);
521}
522
523static int
524nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
525{
526 if (ih) {
527 unregister_int(ih);
528 return (0);
529 }
530 return(-1);
531}
532
533static int
534nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
535{
536 struct nexus_device *ndev = DEVTONX(child);
537 struct resource_list *rl = &ndev->nx_resources;
538
539 /* XXX this should return a success/failure indicator */
540 resource_list_add(rl, type, rid, start, start + count - 1, count);
541 return(0);
542}
543
544static int
545nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
546{
547 struct nexus_device *ndev = DEVTONX(child);
548 struct resource_list *rl = &ndev->nx_resources;
549 struct resource_list_entry *rle;
550
551 rle = resource_list_find(rl, type, rid);
552 device_printf(child, "type %d rid %d startp %p countp %p - got %p\n",
553 type, rid, startp, countp, rle);
554 if (!rle)
555 return(ENOENT);
556 if (startp)
557 *startp = rle->start;
558 if (countp)
559 *countp = rle->count;
560 return(0);
561}
562
563static void
564nexus_delete_resource(device_t dev, device_t child, int type, int rid)
565{
566 struct nexus_device *ndev = DEVTONX(child);
567 struct resource_list *rl = &ndev->nx_resources;
568
569 resource_list_delete(rl, type, rid);
570}
571