kernel tree reorganization stage 1: Major cvs repository work (not logged as
[dragonfly.git] / sys / i386 / 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 $
1f2de5d4 30 * $DragonFly: src/sys/i386/i386/Attic/nexus.c,v 1.3 2003/08/07 21:17:22 dillon 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
1f2de5d4 44#include "use_mca.h"
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45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/bus.h>
49#include <sys/kernel.h>
50#include <sys/malloc.h>
51#include <sys/module.h>
52#include <machine/bus.h>
53#include <sys/rman.h>
54
55#include <machine/vmparam.h>
56#include <vm/vm.h>
57#include <vm/pmap.h>
58#include <machine/pmap.h>
59
60#include <machine/resource.h>
61#ifdef APIC_IO
62#include <machine/smp.h>
63#include <machine/mpapic.h>
64#endif
65
66#ifdef PC98
67#include <pc98/pc98/pc98.h>
68#else
1f2de5d4 69#include <bus/isa/i386/isa.h>
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70#endif
71#include <i386/isa/intr_machdep.h>
72
73static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
74struct nexus_device {
75 struct resource_list nx_resources;
76};
77
78#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
79
80static struct rman irq_rman, drq_rman, port_rman, mem_rman;
81
82static int nexus_probe(device_t);
83static int nexus_attach(device_t);
84static int nexus_print_all_resources(device_t dev);
85static int nexus_print_child(device_t, device_t);
86static device_t nexus_add_child(device_t bus, int order, const char *name,
87 int unit);
88static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
89 u_long, u_long, u_long, u_int);
90static int nexus_activate_resource(device_t, device_t, int, int,
91 struct resource *);
92static int nexus_deactivate_resource(device_t, device_t, int, int,
93 struct resource *);
94static int nexus_release_resource(device_t, device_t, int, int,
95 struct resource *);
96static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
97 void (*)(void *), void *, void **);
98static int nexus_teardown_intr(device_t, device_t, struct resource *,
99 void *);
100static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long);
101static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *);
102static void nexus_delete_resource(device_t, device_t, int, int);
103
104static device_method_t nexus_methods[] = {
105 /* Device interface */
106 DEVMETHOD(device_probe, nexus_probe),
107 DEVMETHOD(device_attach, nexus_attach),
108 DEVMETHOD(device_detach, bus_generic_detach),
109 DEVMETHOD(device_shutdown, bus_generic_shutdown),
110 DEVMETHOD(device_suspend, bus_generic_suspend),
111 DEVMETHOD(device_resume, bus_generic_resume),
112
113 /* Bus interface */
114 DEVMETHOD(bus_print_child, nexus_print_child),
115 DEVMETHOD(bus_add_child, nexus_add_child),
116 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar),
117 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
118 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
119 DEVMETHOD(bus_release_resource, nexus_release_resource),
120 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
121 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
122 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
123 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
124 DEVMETHOD(bus_set_resource, nexus_set_resource),
125 DEVMETHOD(bus_get_resource, nexus_get_resource),
126 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
127
128 { 0, 0 }
129};
130
131static driver_t nexus_driver = {
132 "nexus",
133 nexus_methods,
134 1, /* no softc */
135};
136static devclass_t nexus_devclass;
137
138DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
139
140static int
141nexus_probe(device_t dev)
142{
143
144 device_quiet(dev); /* suppress attach message for neatness */
145
146 /*
147 * IRQ's are on the mainboard on old systems, but on the ISA part
148 * of PCI->ISA bridges. There would be multiple sets of IRQs on
149 * multi-ISA-bus systems. PCI interrupts are routed to the ISA
150 * component, so in a way, PCI can be a partial child of an ISA bus(!).
151 * APIC interrupts are global though.
152 * In the non-APIC case, disallow the use of IRQ 2.
153 */
154 irq_rman.rm_start = 0;
155 irq_rman.rm_type = RMAN_ARRAY;
156 irq_rman.rm_descr = "Interrupt request lines";
157#ifdef APIC_IO
158 irq_rman.rm_end = APIC_INTMAPSIZE - 1;
159 if (rman_init(&irq_rman)
160 || rman_manage_region(&irq_rman,
161 irq_rman.rm_start, irq_rman.rm_end))
162 panic("nexus_probe irq_rman");
163#else
164 irq_rman.rm_end = 15;
165#ifdef PC98
166 if (rman_init(&irq_rman)
167 || rman_manage_region(&irq_rman,
168 irq_rman.rm_start, irq_rman.rm_end))
169 panic("nexus_probe irq_rman");
170#else
171 if (rman_init(&irq_rman)
172 || rman_manage_region(&irq_rman, irq_rman.rm_start, 1)
173 || rman_manage_region(&irq_rman, 3, irq_rman.rm_end))
174 panic("nexus_probe irq_rman");
175#endif /* PC98 */
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#ifdef PC98
185 drq_rman.rm_end = 3;
186#else
187 drq_rman.rm_end = 7;
188#endif
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 /*
227 * First, deal with the children we know about already
228 */
229 bus_generic_attach(dev);
230 /*
231 * And if we didn't see EISA or ISA on a pci bridge, create some
232 * connection points now so they show up "on motherboard".
233 */
234 if (!devclass_get_device(devclass_find("eisa"), 0)) {
235 child = BUS_ADD_CHILD(dev, 0, "eisa", 0);
236 if (child == NULL)
237 panic("nexus_attach eisa");
238 device_probe_and_attach(child);
239 }
240#if NMCA > 0
241 if (!devclass_get_device(devclass_find("mca"), 0)) {
242 child = BUS_ADD_CHILD(dev, 0, "mca", 0);
243 if (child == NULL)
244 panic("nexus_probe mca");
245 device_probe_and_attach(child);
246 }
247#endif
248 if (!devclass_get_device(devclass_find("isa"), 0)) {
249 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
250 if (child == NULL)
251 panic("nexus_attach isa");
252 device_probe_and_attach(child);
253 }
254
255 return 0;
256}
257
258static int
259nexus_print_all_resources(device_t dev)
260{
261 struct nexus_device *ndev = DEVTONX(dev);
262 struct resource_list *rl = &ndev->nx_resources;
263 int retval = 0;
264
265 if (SLIST_FIRST(rl))
266 retval += printf(" at");
267
268 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
269 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
270 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
271
272 return retval;
273}
274
275static int
276nexus_print_child(device_t bus, device_t child)
277{
278 int retval = 0;
279
280 retval += bus_print_child_header(bus, child);
281 retval += nexus_print_all_resources(child);
282 retval += printf(" on motherboard\n");
283
284 return (retval);
285}
286
287static device_t
288nexus_add_child(device_t bus, int order, const char *name, int unit)
289{
290 device_t child;
291 struct nexus_device *ndev;
292
293 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
294 if (!ndev)
295 return(0);
296 resource_list_init(&ndev->nx_resources);
297
298 child = device_add_child_ordered(bus, order, name, unit);
299
300 /* should we free this in nexus_child_detached? */
301 device_set_ivars(child, ndev);
302
303 return(child);
304}
305
306/*
307 * Allocate a resource on behalf of child. NB: child is usually going to be a
308 * child of one of our descendants, not a direct child of nexus0.
309 * (Exceptions include npx.)
310 */
311static struct resource *
312nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
313 u_long start, u_long end, u_long count, u_int flags)
314{
315 struct nexus_device *ndev = DEVTONX(child);
316 struct resource *rv;
317 struct resource_list_entry *rle;
318 struct rman *rm;
319 int needactivate = flags & RF_ACTIVE;
320
321 /*
322 * If this is an allocation of the "default" range for a given RID, and
323 * we know what the resources for this device are (ie. they aren't maintained
324 * by a child bus), then work out the start/end values.
325 */
326 if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
327 if (ndev == NULL)
328 return(NULL);
329 rle = resource_list_find(&ndev->nx_resources, type, *rid);
330 if (rle == NULL)
331 return(NULL);
332 start = rle->start;
333 end = rle->end;
334 count = rle->count;
335 }
336
337 flags &= ~RF_ACTIVE;
338
339 switch (type) {
340 case SYS_RES_IRQ:
341 rm = &irq_rman;
342 break;
343
344 case SYS_RES_DRQ:
345 rm = &drq_rman;
346 break;
347
348 case SYS_RES_IOPORT:
349 rm = &port_rman;
350 break;
351
352 case SYS_RES_MEMORY:
353 rm = &mem_rman;
354 break;
355
356 default:
357 return 0;
358 }
359
360 rv = rman_reserve_resource(rm, start, end, count, flags, child);
361 if (rv == 0)
362 return 0;
363
364 if (type == SYS_RES_MEMORY) {
365 rman_set_bustag(rv, I386_BUS_SPACE_MEM);
366 } else if (type == SYS_RES_IOPORT) {
367 rman_set_bustag(rv, I386_BUS_SPACE_IO);
368#ifndef PC98
369 rman_set_bushandle(rv, rv->r_start);
370#endif
371 }
372
373#ifdef PC98
374 if ((type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) &&
375 i386_bus_space_handle_alloc(rv->r_bustag, rv->r_start, count,
376 &rv->r_bushandle) != 0) {
377 rman_release_resource(rv);
378 return 0;
379 }
380#endif
381
382 if (needactivate) {
383 if (bus_activate_resource(child, type, *rid, rv)) {
384#ifdef PC98
385 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
386 i386_bus_space_handle_free(rv->r_bustag,
387 rv->r_bushandle, rv->r_bushandle->bsh_sz);
388 }
389#endif
390 rman_release_resource(rv);
391 return 0;
392 }
393 }
394
395 return rv;
396}
397
398static int
399nexus_activate_resource(device_t bus, device_t child, int type, int rid,
400 struct resource *r)
401{
402 /*
403 * If this is a memory resource, map it into the kernel.
404 */
405 if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) {
406 caddr_t vaddr = 0;
407
408 if (r->r_end < 1024 * 1024) {
409 /*
410 * The first 1Mb is mapped at KERNBASE.
411 */
412 vaddr = (caddr_t)(uintptr_t)(KERNBASE + r->r_start);
413 } else {
414 u_int32_t paddr;
415 u_int32_t psize;
416 u_int32_t poffs;
417
418 paddr = r->r_start;
419 psize = r->r_end - r->r_start;
420
421 poffs = paddr - trunc_page(paddr);
422 vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs;
423 }
424 rman_set_virtual(r, vaddr);
425#ifdef PC98
426 /* PC-98: the type of bus_space_handle_t is the structure. */
427 r->r_bushandle->bsh_base = (bus_addr_t) vaddr;
428#else
429 /* IBM-PC: the type of bus_space_handle_t is u_int */
430 rman_set_bushandle(r, (bus_space_handle_t) vaddr);
431#endif
432 }
433 return (rman_activate_resource(r));
434}
435
436static int
437nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
438 struct resource *r)
439{
440 /*
441 * If this is a memory resource, unmap it.
442 */
443 if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) && (r->r_end >= 1024 * 1024)) {
444 u_int32_t psize;
445
446 psize = r->r_end - r->r_start;
447 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize);
448 }
449
450 return (rman_deactivate_resource(r));
451}
452
453static int
454nexus_release_resource(device_t bus, device_t child, int type, int rid,
455 struct resource *r)
456{
457 if (r->r_flags & RF_ACTIVE) {
458 int error = bus_deactivate_resource(child, type, rid, r);
459 if (error)
460 return error;
461 }
462#ifdef PC98
463 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
464 i386_bus_space_handle_free(r->r_bustag, r->r_bushandle,
465 r->r_bushandle->bsh_sz);
466 }
467#endif
468 return (rman_release_resource(r));
469}
470
471/*
472 * Currently this uses the really grody interface from kern/kern_intr.c
473 * (which really doesn't belong in kern/anything.c). Eventually, all of
474 * the code in kern_intr.c and machdep_intr.c should get moved here, since
475 * this is going to be the official interface.
476 */
477static int
478nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
479 int flags, void (*ihand)(void *), void *arg, void **cookiep)
480{
481 intrmask_t *mask;
482 driver_t *driver;
483 int error, icflags;
484
485 /* somebody tried to setup an irq that failed to allocate! */
486 if (irq == NULL)
487 panic("nexus_setup_intr: NULL irq resource!");
488
489 *cookiep = 0;
490 if (irq->r_flags & RF_SHAREABLE)
491 icflags = 0;
492 else
493 icflags = INTR_EXCL;
494
495 driver = device_get_driver(child);
496 switch (flags & ~INTR_TYPE_FAST) {
497 case INTR_TYPE_TTY:
498 mask = &tty_imask;
499 break;
500 case INTR_TYPE_BIO:
501 mask = &bio_imask;
502 break;
503 case INTR_TYPE_NET:
504 mask = &net_imask;
505 break;
506 case INTR_TYPE_CAM:
507 mask = &cam_imask;
508 break;
509 case INTR_TYPE_MISC:
510 mask = 0;
511 break;
512 default:
513 panic("still using grody create_intr interface");
514 }
515 if (flags & INTR_TYPE_FAST)
516 icflags |= INTR_FAST;
517
518 /*
519 * We depend here on rman_activate_resource() being idempotent.
520 */
521 error = rman_activate_resource(irq);
522 if (error)
523 return (error);
524
525 *cookiep = inthand_add(device_get_nameunit(child), irq->r_start,
526 ihand, arg, mask, icflags);
527 if (*cookiep == NULL)
528 error = EINVAL; /* XXX ??? */
529
530 return (error);
531}
532
533static int
534nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
535{
536 return (inthand_remove(ih));
537}
538
539static int
540nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
541{
542 struct nexus_device *ndev = DEVTONX(child);
543 struct resource_list *rl = &ndev->nx_resources;
544
545 /* XXX this should return a success/failure indicator */
546 resource_list_add(rl, type, rid, start, start + count - 1, count);
547 return(0);
548}
549
550static int
551nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
552{
553 struct nexus_device *ndev = DEVTONX(child);
554 struct resource_list *rl = &ndev->nx_resources;
555 struct resource_list_entry *rle;
556
557 rle = resource_list_find(rl, type, rid);
558 device_printf(child, "type %d rid %d startp %p countp %p - got %p\n",
559 type, rid, startp, countp, rle);
560 if (!rle)
561 return(ENOENT);
562 if (startp)
563 *startp = rle->start;
564 if (countp)
565 *countp = rle->count;
566 return(0);
567}
568
569static void
570nexus_delete_resource(device_t dev, device_t child, int type, int rid)
571{
572 struct nexus_device *ndev = DEVTONX(child);
573 struct resource_list *rl = &ndev->nx_resources;
574
575 resource_list_delete(rl, type, rid);
576}