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boot - Add EFI support for placing /boot in a disklabel's 'a' partition.
[dragonfly.git] / sys / bus / isa / pnpparse.c
blobd36a29fc0bf4dccceb3af197f980e6880c006561
1 /*-
2 * Copyright (c) 1999 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: src/sys/isa/pnpparse.c,v 1.14 2003/06/11 00:32:45 obrien Exp $
27 * $DragonFly: src/sys/bus/isa/pnpparse.c,v 1.11 2008/07/21 23:42:02 swildner Exp $
28 */
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/module.h>
34 #include <sys/bus.h>
35
36 #include <machine/stdarg.h>
37
38 #include "isavar.h"
39 #include "pnpreg.h"
40 #include "pnpvar.h"
41
42 #define MAXDEP 8
43
44 #define I16(p) ((p)[0] + ((p)[1] << 8))
45 #define I32(p) (I16(p) + (I16((p)+2) << 16))
46
47 void
48 pnp_printf(u_int32_t id, char *fmt, ...)
49 {
50 __va_list ap;
51
52 __va_start(ap, fmt);
53 kprintf("%s: ", pnp_eisaformat(id));
54 kvprintf(fmt, ap);
55 __va_end(ap);
56 }
57
58 /* parse a single descriptor */
59
60 static int
61 pnp_parse_desc(device_t dev, u_char tag, u_char *res, int len,
62 struct isa_config *config, int ldn)
63 {
64 char buf[100];
65 u_int32_t id;
66 u_int32_t compat_id;
67 int temp;
68
69 id = isa_get_logicalid(dev);
70
71 if (PNP_RES_TYPE(tag) == 0) {
72
73 /* Small resource */
74 switch (PNP_SRES_NUM(tag)) {
75
76 case PNP_TAG_VERSION:
77 case PNP_TAG_VENDOR:
78 /* these descriptors are quietly ignored */
79 break;
80
81 case PNP_TAG_LOGICAL_DEVICE:
82 case PNP_TAG_START_DEPENDANT:
83 case PNP_TAG_END_DEPENDANT:
84 if (bootverbose)
85 pnp_printf(id, "unexpected small tag %d\n",
86 PNP_SRES_NUM(tag));
87 /* shouldn't happen; quit now */
88 return (1);
89
90 case PNP_TAG_COMPAT_DEVICE:
91 /*
92 * Got a compatible device id resource.
93 * Should keep a list of compat ids in the device.
94 */
95 bcopy(res, &compat_id, 4);
96 if (isa_get_compatid(dev) == 0)
97 isa_set_compatid(dev, compat_id);
98 break;
99
100 case PNP_TAG_IRQ_FORMAT:
101 if (config->ic_nirq == ISA_NIRQ) {
102 pnp_printf(id, "too many irqs\n");
103 return (1);
104 }
105 if (I16(res) == 0) {
106 /* a null descriptor */
107 config->ic_irqmask[config->ic_nirq] = 0;
108 config->ic_nirq++;
109 break;
110 }
111 if (bootverbose)
112 pnp_printf(id, "adding irq mask %#02x\n",
113 I16(res));
114 config->ic_irqmask[config->ic_nirq] = I16(res);
115 config->ic_nirq++;
116 break;
117
118 case PNP_TAG_DMA_FORMAT:
119 if (config->ic_ndrq == ISA_NDRQ) {
120 pnp_printf(id, "too many drqs\n");
121 return (1);
122 }
123 if (res[0] == 0) {
124 /* a null descriptor */
125 config->ic_drqmask[config->ic_ndrq] = 0;
126 config->ic_ndrq++;
127 break;
128 }
129 if (bootverbose)
130 pnp_printf(id, "adding dma mask %#02x\n",
131 res[0]);
132 config->ic_drqmask[config->ic_ndrq] = res[0];
133 config->ic_ndrq++;
134 break;
135
136 case PNP_TAG_IO_RANGE:
137 if (config->ic_nport == ISA_NPORT) {
138 pnp_printf(id, "too many ports\n");
139 return (1);
140 }
141 if (res[6] == 0) {
142 /* a null descriptor */
143 config->ic_port[config->ic_nport].ir_start = 0;
144 config->ic_port[config->ic_nport].ir_end = 0;
145 config->ic_port[config->ic_nport].ir_size = 0;
146 config->ic_port[config->ic_nport].ir_align = 0;
147 config->ic_nport++;
148 break;
149 }
150 if (bootverbose) {
151 pnp_printf(id, "adding io range "
152 "%#x-%#x, size=%#x, "
153 "align=%#x\n",
154 I16(res + 1),
155 I16(res + 3) + res[6]-1,
156 res[6], res[5]);
157 }
158 config->ic_port[config->ic_nport].ir_start =
159 I16(res + 1);
160 config->ic_port[config->ic_nport].ir_end =
161 I16(res + 3) + res[6] - 1;
162 config->ic_port[config->ic_nport].ir_size = res[6];
163 if (res[5] == 0) {
164 /* Make sure align is at least one */
165 res[5] = 1;
166 }
167 config->ic_port[config->ic_nport].ir_align = res[5];
168 config->ic_nport++;
169 pnp_check_quirks(isa_get_vendorid(dev),
170 isa_get_logicalid(dev), ldn, config);
171 break;
172
173 case PNP_TAG_IO_FIXED:
174 if (config->ic_nport == ISA_NPORT) {
175 pnp_printf(id, "too many ports\n");
176 return (1);
177 }
178 if (res[2] == 0) {
179 /* a null descriptor */
180 config->ic_port[config->ic_nport].ir_start = 0;
181 config->ic_port[config->ic_nport].ir_end = 0;
182 config->ic_port[config->ic_nport].ir_size = 0;
183 config->ic_port[config->ic_nport].ir_align = 0;
184 config->ic_nport++;
185 break;
186 }
187 if (bootverbose) {
188 pnp_printf(id, "adding fixed io range "
189 "%#x-%#x, size=%#x, "
190 "align=%#x\n",
191 I16(res),
192 I16(res) + res[2] - 1,
193 res[2], 1);
194 }
195 config->ic_port[config->ic_nport].ir_start = I16(res);
196 config->ic_port[config->ic_nport].ir_end =
197 I16(res) + res[2] - 1;
198 config->ic_port[config->ic_nport].ir_size = res[2];
199 config->ic_port[config->ic_nport].ir_align = 1;
200 config->ic_nport++;
201 break;
202
203 case PNP_TAG_END:
204 if (bootverbose)
205 pnp_printf(id, "end config\n");
206 return (1);
207
208 default:
209 /* Skip this resource */
210 pnp_printf(id, "unexpected small tag %d\n",
211 PNP_SRES_NUM(tag));
212 break;
213 }
214 } else {
215 /* Large resource */
216 switch (PNP_LRES_NUM(tag)) {
217
218 case PNP_TAG_ID_UNICODE:
219 case PNP_TAG_LARGE_VENDOR:
220 /* these descriptors are quietly ignored */
221 break;
222
223 case PNP_TAG_ID_ANSI:
224 if (len > sizeof(buf) - 1)
225 len = sizeof(buf) - 1;
226 bcopy(res, buf, len);
227
228 /*
229 * Trim trailing spaces and garbage.
230 */
231 while (len > 0 && buf[len - 1] <= ' ')
232 len--;
233 buf[len] = '\0';
234 device_set_desc_copy(dev, buf);
235 break;
236
237 case PNP_TAG_MEMORY_RANGE:
238 if (config->ic_nmem == ISA_NMEM) {
239 pnp_printf(id, "too many memory ranges\n");
240 return (1);
241 }
242 if (I16(res + 7) == 0) {
243 /* a null descriptor */
244 config->ic_mem[config->ic_nmem].ir_start = 0;
245 config->ic_mem[config->ic_nmem].ir_end = 0;
246 config->ic_mem[config->ic_nmem].ir_size = 0;
247 config->ic_mem[config->ic_nmem].ir_align = 0;
248 config->ic_nmem++;
249 break;
250 }
251 if (bootverbose) {
252 temp = I16(res + 7) << 8;
253 pnp_printf(id, "adding memory range "
254 "%#x-%#x, size=%#x, "
255 "align=%#x\n",
256 I16(res + 1) << 8,
257 (I16(res + 3) << 8) + temp - 1,
258 temp, I16(res + 5));
259 }
260 config->ic_mem[config->ic_nmem].ir_start =
261 I16(res + 1) << 8;
262 config->ic_mem[config->ic_nmem].ir_end =
263 (I16(res + 3) << 8) + (I16(res + 7) << 8) - 1;
264 config->ic_mem[config->ic_nmem].ir_size =
265 I16(res + 7) << 8;
266 config->ic_mem[config->ic_nmem].ir_align = I16(res + 5);
267 if (!config->ic_mem[config->ic_nmem].ir_align)
268 config->ic_mem[config->ic_nmem].ir_align =
269 0x10000;
270 config->ic_nmem++;
271 break;
272
273 case PNP_TAG_MEMORY32_RANGE:
274 if (config->ic_nmem == ISA_NMEM) {
275 pnp_printf(id, "too many memory ranges\n");
276 return (1);
277 }
278 if (I32(res + 13) == 0) {
279 /* a null descriptor */
280 config->ic_mem[config->ic_nmem].ir_start = 0;
281 config->ic_mem[config->ic_nmem].ir_end = 0;
282 config->ic_mem[config->ic_nmem].ir_size = 0;
283 config->ic_mem[config->ic_nmem].ir_align = 0;
284 config->ic_nmem++;
285 break;
286 }
287 if (bootverbose) {
288 pnp_printf(id, "adding memory32 range "
289 "%#x-%#x, size=%#x, "
290 "align=%#x\n",
291 I32(res + 1),
292 I32(res + 5) + I32(res + 13) - 1,
293 I32(res + 13), I32(res + 9));
294 }
295 config->ic_mem[config->ic_nmem].ir_start = I32(res + 1);
296 config->ic_mem[config->ic_nmem].ir_end =
297 I32(res + 5) + I32(res + 13) - 1;
298 config->ic_mem[config->ic_nmem].ir_size = I32(res + 13);
299 config->ic_mem[config->ic_nmem].ir_align = I32(res + 9);
300 config->ic_nmem++;
301 break;
302
303 case PNP_TAG_MEMORY32_FIXED:
304 if (config->ic_nmem == ISA_NMEM) {
305 pnp_printf(id, "too many memory ranges\n");
306 return (1);
307 }
308 if (I32(res + 5) == 0) {
309 /* a null descriptor */
310 config->ic_mem[config->ic_nmem].ir_start = 0;
311 config->ic_mem[config->ic_nmem].ir_end = 0;
312 config->ic_mem[config->ic_nmem].ir_size = 0;
313 config->ic_mem[config->ic_nmem].ir_align = 0;
314 break;
315 }
316 if (bootverbose) {
317 pnp_printf(id, "adding fixed memory32 range "
318 "%#x-%#x, size=%#x\n",
319 I32(res + 1),
320 I32(res + 1) + I32(res + 5) - 1,
321 I32(res + 5));
322 }
323 config->ic_mem[config->ic_nmem].ir_start = I32(res + 1);
324 config->ic_mem[config->ic_nmem].ir_end =
325 I32(res + 1) + I32(res + 5) - 1;
326 config->ic_mem[config->ic_nmem].ir_size = I32(res + 5);
327 config->ic_mem[config->ic_nmem].ir_align = 1;
328 config->ic_nmem++;
329 break;
330
331 default:
332 /* Skip this resource */
333 pnp_printf(id, "unexpected large tag %d\n",
334 PNP_SRES_NUM(tag));
335 break;
336 }
337 }
338
339 return (0);
340 }
341
342 /*
343 * Parse a single "dependent" resource combination.
344 */
345
346 u_char *
347 pnp_parse_dependant(device_t dev, u_char *resources, int len,
348 struct isa_config *config, int ldn)
349 {
350 u_char *res;
351
352 res = pnp_scan_resources(dev, resources, len, config,
353 ldn, pnp_parse_desc);
354 return(res);
355 }
356
357 static void
358 pnp_merge_resources(device_t dev, struct isa_config *from,
359 struct isa_config *to)
360 {
361 device_t parent;
362 int i;
363
364 parent = device_get_parent(dev);
365 for (i = 0; i < from->ic_nmem; i++) {
366 if (to->ic_nmem == ISA_NMEM) {
367 device_printf(parent, "too many memory ranges\n");
368 return;
369 }
370 to->ic_mem[to->ic_nmem] = from->ic_mem[i];
371 to->ic_nmem++;
372 }
373 for (i = 0; i < from->ic_nport; i++) {
374 if (to->ic_nport == ISA_NPORT) {
375 device_printf(parent, "too many port ranges\n");
376 return;
377 }
378 to->ic_port[to->ic_nport] = from->ic_port[i];
379 to->ic_nport++;
380 }
381 for (i = 0; i < from->ic_nirq; i++) {
382 if (to->ic_nirq == ISA_NIRQ) {
383 device_printf(parent, "too many irq ranges\n");
384 return;
385 }
386 to->ic_irqmask[to->ic_nirq] = from->ic_irqmask[i];
387 to->ic_nirq++;
388 }
389 for (i = 0; i < from->ic_ndrq; i++) {
390 if (to->ic_ndrq == ISA_NDRQ) {
391 device_printf(parent, "too many drq ranges\n");
392 return;
393 }
394 to->ic_drqmask[to->ic_ndrq] = from->ic_drqmask[i];
395 to->ic_ndrq++;
396 }
397 }
398
399 /*
400 * Parse resource data for Logical Devices, make a list of available
401 * resource configurations, and add them to the device.
402 *
403 * This function exits as soon as it gets an error reading *ANY*
404 * Resource Data or it reaches the end of Resource Data.
405 */
406
407 void
408 pnp_parse_resources(device_t dev, u_char *resources, int len, int ldn)
409 {
410 struct isa_config *configs;
411 struct isa_config *config;
412 device_t parent;
413 int priorities[1 + MAXDEP];
414 u_char *start;
415 u_char *p;
416 u_char tag;
417 u_int32_t id;
418 int ncfgs;
419 int l;
420 int i;
421
422 parent = device_get_parent(dev);
423 id = isa_get_logicalid(dev);
424
425 configs = kmalloc(sizeof(*configs)*(1 + MAXDEP),
426 M_DEVBUF, M_WAITOK | M_ZERO);
427 config = &configs[0];
428 priorities[0] = 0;
429 ncfgs = 1;
430
431 p = resources;
432 start = NULL;
433 while (len > 0) {
434 tag = *p++;
435 len--;
436 if (PNP_RES_TYPE(tag) == 0) {
437 /* Small resource */
438 l = PNP_SRES_LEN(tag);
439 if (len < l) {
440 len = 0;
441 continue;
442 }
443 len -= l;
444
445 switch (PNP_SRES_NUM(tag)) {
446
447 case PNP_TAG_START_DEPENDANT:
448 if (start != NULL) {
449 /*
450 * Copy the common resources first,
451 * then parse the "dependent" resources.
452 */
453 pnp_merge_resources(dev, &configs[0],
454 config);
455 pnp_parse_dependant(dev, start,
456 p - start - 1,
457 config, ldn);
458 }
459 start = p + l;
460 if (ncfgs > MAXDEP) {
461 device_printf(parent, "too many dependent configs (%d)\n", MAXDEP);
462 len = 0;
463 break;
464 }
465 config = &configs[ncfgs];
466 /*
467 * If the priority is not specified,
468 * then use the default of 'acceptable'
469 */
470 if (l > 0)
471 priorities[ncfgs] = p[0];
472 else
473 priorities[ncfgs] = 1;
474 if (bootverbose)
475 pnp_printf(id, "start dependent (%d)\n",
476 priorities[ncfgs]);
477 ncfgs++;
478 break;
479
480 case PNP_TAG_END_DEPENDANT:
481 if (start == NULL) {
482 device_printf(parent,
483 "malformed resources\n");
484 len = 0;
485 break;
486 }
487 /*
488 * Copy the common resources first,
489 * then parse the "dependent" resources.
490 */
491 pnp_merge_resources(dev, &configs[0], config);
492 pnp_parse_dependant(dev, start, p - start - 1,
493 config, ldn);
494 start = NULL;
495 if (bootverbose)
496 pnp_printf(id, "end dependent\n");
497 /*
498 * Back to the common part; clear it
499 * as its contents has already been copied
500 * to each dependant.
501 */
502 config = &configs[0];
503 bzero(config, sizeof(*config));
504 break;
505
506 case PNP_TAG_END:
507 if (start != NULL) {
508 device_printf(parent,
509 "malformed resources\n");
510 }
511 len = 0;
512 break;
513
514 default:
515 if (start != NULL)
516 /* defer parsing a dependent section */
517 break;
518 if (pnp_parse_desc(dev, tag, p, l, config, ldn))
519 len = 0;
520 break;
521 }
522 p += l;
523 } else {
524 /* Large resource */
525 if (len < 2) {
526 len = 0;
527 break;
528 }
529 l = I16(p);
530 p += 2;
531 len -= 2;
532 if (len < l) {
533 len = 0;
534 break;
535 }
536 len -= l;
537 if (start == NULL &&
538 pnp_parse_desc(dev, tag, p, l, config, ldn)) {
539 len = 0;
540 break;
541 }
542 p += l;
543 }
544 }
545
546 if (ncfgs == 1) {
547 /* Single config without dependants */
548 ISA_ADD_CONFIG(parent, dev, priorities[0], &configs[0]);
549 kfree(configs, M_DEVBUF);
550 return;
551 }
552
553 for (i = 1; i < ncfgs; i++) {
554 /*
555 * Merge the remaining part of the common resources,
556 * if any. Strictly speaking, there shouldn't be common/main
557 * resources after the END_DEPENDENT tag.
558 */
559 pnp_merge_resources(dev, &configs[0], &configs[i]);
560 ISA_ADD_CONFIG(parent, dev, priorities[i], &configs[i]);
561 }
562
563 kfree(configs, M_DEVBUF);
564 }
565
566 u_char *
567 pnp_scan_resources(device_t dev, u_char *resources, int len,
568 struct isa_config *config, int ldn, pnp_scan_cb *cb)
569 {
570 u_char *p;
571 u_char tag;
572 int l;
573
574 p = resources;
575 while (len > 0) {
576 tag = *p++;
577 len--;
578 if (PNP_RES_TYPE(tag) == 0) {
579 /* small resource */
580 l = PNP_SRES_LEN(tag);
581 if (len < l)
582 break;
583 if ((*cb)(dev, tag, p, l, config, ldn))
584 return (p + l);
585 if (PNP_SRES_NUM(tag) == PNP_TAG_END)
586 return (p + l);
587 } else {
588 /* large resource */
589 if (len < 2)
590 break;
591 l = I16(p);
592 p += 2;
593 len -= 2;
594 if (len < l)
595 break;
596 if ((*cb)(dev, tag, p, l, config, ldn))
597 return (p + l);
598 }
599 p += l;
600 len -= l;
601 }
602 return NULL;
603 }
DragonFly BSD