Use mptable_iterate_entries() in mptable_pass2()
[dragonfly.git] / sys / platform / pc64 / x86_64 / mp_madt.c
CommitLineData
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1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/param.h>
36#include <sys/systm.h>
37
38#include <machine/pmap.h>
39#include <machine/smp.h>
40
41#define ACPI_RSDP_EBDA_MAPSZ 1024
42#define ACPI_RSDP_BIOS_MAPSZ 0x20000
43#define ACPI_RSDP_BIOS_MAPADDR 0xe0000
44
45#define ACPI_RSDP_ALIGN 16
46
47#define ACPI_RSDP_SIGLEN 8
48#define ACPI_RSDP_SIG "RSD PTR "
49
50#define ACPI_SDTH_SIGLEN 4
51#define ACPI_RSDT_SIG "RSDT"
52#define ACPI_XSDT_SIG "XSDT"
53#define ACPI_MADT_SIG "APIC"
54
55/* Root System Description Pointer */
56struct acpi_rsdp {
57 uint8_t rsdp_sig[ACPI_RSDP_SIGLEN];
58 uint8_t rsdp_cksum;
59 uint8_t rsdp_oem_id[6];
60 uint8_t rsdp_rev;
61 uint32_t rsdp_rsdt;
62 uint32_t rsdp_len;
63 uint64_t rsdp_xsdt;
64 uint8_t rsdp_ext_cksum;
65 uint8_t rsdp_rsvd[3];
66} __packed;
67
68/* System Description Table Header */
69struct acpi_sdth {
70 uint8_t sdth_sig[ACPI_SDTH_SIGLEN];
71 uint32_t sdth_len;
72 uint8_t sdth_rev;
73 uint8_t sdth_cksum;
74 uint8_t sdth_oem_id[6];
75 uint8_t sdth_oem_tbid[8];
76 uint32_t sdth_oem_rev;
77 uint32_t sdth_crt_id;
78 uint32_t sdth_crt_rev;
79} __packed;
80
81/* Extended System Description Table */
82struct acpi_xsdt {
83 struct acpi_sdth xsdt_hdr;
84 uint64_t xsdt_ents[1];
85} __packed;
86
87/* Root System Description Table */
88struct acpi_rsdt {
89 struct acpi_sdth rsdt_hdr;
90 uint32_t rsdt_ents[1];
91} __packed;
92
93/* Multiple APIC Description Table */
94struct acpi_madt {
95 struct acpi_sdth madt_hdr;
96 uint32_t madt_lapic_addr;
97 uint32_t madt_flags;
98 uint8_t madt_ents[1];
99} __packed;
100
101/* Common parts of MADT APIC structure */
102struct acpi_madt_ent {
103 uint8_t me_type; /* MADT_ENT_ */
104 uint8_t me_len;
105} __packed;
106
107#define MADT_ENT_LAPIC 0
108
109/* MADT Processor Local APIC */
110struct acpi_madt_lapic {
111 struct acpi_madt_ent ml_hdr;
112 uint8_t ml_cpu_id;
113 uint8_t ml_apic_id;
114 uint32_t ml_flags; /* MADT_LAPIC_ */
115} __packed;
116
117#define MADT_LAPIC_ENABLED 0x1
118
119typedef vm_paddr_t (*madt_search_t)(vm_paddr_t);
120
121static const struct acpi_rsdp *madt_rsdp_search(const uint8_t *, int);
122static void *madt_sdth_map(vm_paddr_t);
123static void madt_sdth_unmap(struct acpi_sdth *);
124static vm_paddr_t madt_search_xsdt(vm_paddr_t);
125static vm_paddr_t madt_search_rsdt(vm_paddr_t);
4ad5917f 126static int madt_check(vm_paddr_t);
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127
128extern u_long ebda_addr;
129
4ad5917f 130vm_paddr_t
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131madt_probe(void)
132{
133 const struct acpi_rsdp *rsdp;
134 madt_search_t search;
135 vm_paddr_t search_paddr, madt_paddr;
136 vm_size_t mapsz;
137 uint8_t *ptr;
138
139 if (ebda_addr != 0) {
140 mapsz = ACPI_RSDP_EBDA_MAPSZ;
141 ptr = pmap_mapdev(ebda_addr, mapsz);
142
143 rsdp = madt_rsdp_search(ptr, mapsz);
144 if (rsdp == NULL) {
145 kprintf("madt: RSDP not in EBDA\n");
146 pmap_unmapdev((vm_offset_t)ptr, mapsz);
147
148 ptr = NULL;
149 mapsz = 0;
150 } else {
151 kprintf("madt: RSDP in EBDA\n");
152 goto found_rsdp;
153 }
154 }
155
156 mapsz = ACPI_RSDP_BIOS_MAPSZ;
157 ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
158
159 rsdp = madt_rsdp_search(ptr, mapsz);
160 if (rsdp == NULL) {
161 kprintf("madt_probe: no RSDP\n");
162 pmap_unmapdev((vm_offset_t)ptr, mapsz);
4ad5917f 163 return 0;
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164 } else {
165 kprintf("madt: RSDP in BIOS mem\n");
166 }
167
168found_rsdp:
169 if (rsdp->rsdp_rev != 2) {
170 search_paddr = rsdp->rsdp_rsdt;
171 search = madt_search_rsdt;
172 } else {
173 search_paddr = rsdp->rsdp_xsdt;
174 search = madt_search_xsdt;
175 }
176 pmap_unmapdev((vm_offset_t)ptr, mapsz);
177
178 madt_paddr = search(search_paddr);
179 if (madt_paddr == 0) {
180 kprintf("madt_probe: can't locate MADT\n");
4ad5917f 181 return 0;
8e4c6923 182 }
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183
184 /* Preliminary checks */
185 if (madt_check(madt_paddr))
186 return 0;
187 return madt_paddr;
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188}
189
190static const struct acpi_rsdp *
191madt_rsdp_search(const uint8_t *target, int size)
192{
193 const struct acpi_rsdp *rsdp;
194 int i;
195
196 KKASSERT(size > sizeof(*rsdp));
197
198 for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
199 rsdp = (const struct acpi_rsdp *)&target[i];
200 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
201 ACPI_RSDP_SIGLEN) == 0)
202 return rsdp;
203 }
204 return NULL;
205}
206
207static void *
208madt_sdth_map(vm_paddr_t paddr)
209{
210 struct acpi_sdth *sdth;
211 vm_size_t mapsz;
212
213 sdth = pmap_mapdev(paddr, sizeof(*sdth));
214 mapsz = sdth->sdth_len;
215 pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
216
217 if (mapsz < sizeof(*sdth))
218 return NULL;
219
220 return pmap_mapdev(paddr, mapsz);
221}
222
223static void
224madt_sdth_unmap(struct acpi_sdth *sdth)
225{
226 pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
227}
228
229static vm_paddr_t
230madt_search_xsdt(vm_paddr_t xsdt_paddr)
231{
232 struct acpi_xsdt *xsdt;
233 vm_paddr_t madt_paddr = 0;
234 int i, nent;
235
236 if (xsdt_paddr == 0) {
237 kprintf("madt_search_xsdt: XSDT paddr == 0\n");
238 return 0;
239 }
240
241 xsdt = madt_sdth_map(xsdt_paddr);
242 if (xsdt == NULL) {
243 kprintf("madt_search_xsdt: can't map XSDT\n");
244 return 0;
245 }
246
247 if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
248 ACPI_SDTH_SIGLEN) != 0) {
249 kprintf("madt_search_xsdt: not XSDT\n");
250 goto back;
251 }
252
253 if (xsdt->xsdt_hdr.sdth_rev != 1) {
254 kprintf("madt_search_xsdt: unsupported XSDT revision %d\n",
255 xsdt->xsdt_hdr.sdth_rev);
256 goto back;
257 }
258
259 nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
260 sizeof(xsdt->xsdt_ents[0]);
261 for (i = 0; i < nent; ++i) {
262 struct acpi_sdth *sdth;
263
264 if (xsdt->xsdt_ents[i] == 0)
265 continue;
266
267 sdth = madt_sdth_map(xsdt->xsdt_ents[i]);
268 if (sdth != NULL) {
269 int ret;
270
271 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
272 ACPI_SDTH_SIGLEN);
273 madt_sdth_unmap(sdth);
274
275 if (ret == 0) {
276 kprintf("madt: MADT in XSDT\n");
277 madt_paddr = xsdt->xsdt_ents[i];
278 break;
279 }
280 }
281 }
282back:
283 madt_sdth_unmap(&xsdt->xsdt_hdr);
284 return madt_paddr;
285}
286
287static vm_paddr_t
288madt_search_rsdt(vm_paddr_t rsdt_paddr)
289{
290 struct acpi_rsdt *rsdt;
291 vm_paddr_t madt_paddr = 0;
292 int i, nent;
293
294 if (rsdt_paddr == 0) {
295 kprintf("madt_search_rsdt: RSDT paddr == 0\n");
296 return 0;
297 }
298
299 rsdt = madt_sdth_map(rsdt_paddr);
300 if (rsdt == NULL) {
301 kprintf("madt_search_rsdt: can't map RSDT\n");
302 return 0;
303 }
304
305 if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
306 ACPI_SDTH_SIGLEN) != 0) {
307 kprintf("madt_search_rsdt: not RSDT\n");
308 goto back;
309 }
310
311 if (rsdt->rsdt_hdr.sdth_rev != 1) {
312 kprintf("madt_search_rsdt: unsupported RSDT revision %d\n",
313 rsdt->rsdt_hdr.sdth_rev);
314 goto back;
315 }
316
317 nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
318 sizeof(rsdt->rsdt_ents[0]);
319 for (i = 0; i < nent; ++i) {
320 struct acpi_sdth *sdth;
321
322 if (rsdt->rsdt_ents[i] == 0)
323 continue;
324
325 sdth = madt_sdth_map(rsdt->rsdt_ents[i]);
326 if (sdth != NULL) {
327 int ret;
328
329 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
330 ACPI_SDTH_SIGLEN);
331 madt_sdth_unmap(sdth);
332
333 if (ret == 0) {
334 kprintf("madt: MADT in RSDT\n");
335 madt_paddr = rsdt->rsdt_ents[i];
336 break;
337 }
338 }
339 }
340back:
341 madt_sdth_unmap(&rsdt->rsdt_hdr);
342 return madt_paddr;
343}
344
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345vm_offset_t
346madt_pass1(vm_paddr_t madt_paddr)
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347{
348 struct acpi_madt *madt;
4ad5917f 349 vm_offset_t lapic_addr;
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350
351 KKASSERT(madt_paddr != 0);
352
353 madt = madt_sdth_map(madt_paddr);
354 KKASSERT(madt != NULL);
355
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356 kprintf("madt: LAPIC address 0x%08x, flags %#x\n",
357 madt->madt_lapic_addr, madt->madt_flags);
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358 lapic_addr = madt->madt_lapic_addr;
359
360 madt_sdth_unmap(&madt->madt_hdr);
361
362 return lapic_addr;
363}
364
365int
366madt_pass2(vm_paddr_t madt_paddr, int bsp_apic_id)
367{
368 struct acpi_madt *madt;
369 int size, cur, error, cpu, found_bsp;
370
371 kprintf("madt: BSP apic id %d\n", bsp_apic_id);
372
373 KKASSERT(madt_paddr != 0);
374
375 madt = madt_sdth_map(madt_paddr);
376 KKASSERT(madt != NULL);
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377
378 size = madt->madt_hdr.sdth_len -
379 (sizeof(*madt) - sizeof(madt->madt_ents));
380 cur = 0;
381 error = 0;
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382 found_bsp = 0;
383 cpu = 1;
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384
385 while (size - cur > sizeof(struct acpi_madt_ent)) {
386 const struct acpi_madt_ent *ent;
387
388 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
389 if (ent->me_len < sizeof(*ent)) {
4ad5917f 390 kprintf("madt_pass2: invalid MADT entry len %d\n",
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391 ent->me_len);
392 error = EINVAL;
393 break;
394 }
395 if (ent->me_len > (size - cur)) {
4ad5917f 396 kprintf("madt_pass2: invalid MADT entry len %d, "
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397 "> table length\n", ent->me_len);
398 error = EINVAL;
399 break;
400 }
401
402 cur += ent->me_len;
403
404 if (ent->me_type == MADT_ENT_LAPIC) {
405 const struct acpi_madt_lapic *lapic_ent;
406
407 if (ent->me_len < sizeof(*lapic_ent)) {
4ad5917f 408 kprintf("madt_pass2: invalid MADT lapic entry "
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409 "len %d\n", ent->me_len);
410 error = EINVAL;
411 break;
412 }
413 lapic_ent = (const struct acpi_madt_lapic *)ent;
414 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
415 kprintf("madt: cpu_id %d, apic_id %d\n",
416 lapic_ent->ml_cpu_id,
417 lapic_ent->ml_apic_id);
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418 if (lapic_ent->ml_apic_id == bsp_apic_id) {
419 mp_set_cpuids(0,
420 lapic_ent->ml_apic_id);
421 found_bsp = 1;
422 } else {
423 mp_set_cpuids(cpu,
424 lapic_ent->ml_apic_id);
425 ++cpu;
426 }
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427 }
428 }
429 }
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430 if (!found_bsp) {
431 kprintf("madt_pass2: BSP is not found\n");
432 error = EINVAL;
433 }
434 if (cpu == 1) {
435 kprintf("madt_pass2: no APs\n");
699b0754 436 error = EINVAL;
4ad5917f 437 }
699b0754 438 if (!error)
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439 mp_naps = cpu - 1;
440
441 madt_sdth_unmap(&madt->madt_hdr);
442 return error;
443}
444
445static int
446madt_check(vm_paddr_t madt_paddr)
447{
448 struct acpi_madt *madt;
449 int error = 0;
450
451 KKASSERT(madt_paddr != 0);
452
453 madt = madt_sdth_map(madt_paddr);
454 KKASSERT(madt != NULL);
455
456 if (madt->madt_hdr.sdth_rev != 1 && madt->madt_hdr.sdth_rev != 2) {
457 kprintf("madt_check: unsupported MADT revision %d\n",
458 madt->madt_hdr.sdth_rev);
459 error = EOPNOTSUPP;
460 goto back;
461 }
462
463 if (madt->madt_hdr.sdth_len <
464 sizeof(*madt) - sizeof(madt->madt_ents)) {
465 kprintf("madt_check: invalid MADT length %u\n",
466 madt->madt_hdr.sdth_len);
467 error = EINVAL;
468 }
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469back:
470 madt_sdth_unmap(&madt->madt_hdr);
471 return error;
472}
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473
474