2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <machine/pmap.h>
39 #include <machine/smp.h>
41 #define ACPI_RSDP_EBDA_MAPSZ 1024
42 #define ACPI_RSDP_BIOS_MAPSZ 0x20000
43 #define ACPI_RSDP_BIOS_MAPADDR 0xe0000
45 #define ACPI_RSDP_ALIGN 16
47 #define ACPI_RSDP_SIGLEN 8
48 #define ACPI_RSDP_SIG "RSD PTR "
50 #define ACPI_SDTH_SIGLEN 4
51 #define ACPI_RSDT_SIG "RSDT"
52 #define ACPI_XSDT_SIG "XSDT"
53 #define ACPI_MADT_SIG "APIC"
55 /* Root System Description Pointer */
57 uint8_t rsdp_sig[ACPI_RSDP_SIGLEN];
59 uint8_t rsdp_oem_id[6];
64 uint8_t rsdp_ext_cksum;
68 /* System Description Table Header */
70 uint8_t sdth_sig[ACPI_SDTH_SIGLEN];
74 uint8_t sdth_oem_id[6];
75 uint8_t sdth_oem_tbid[8];
76 uint32_t sdth_oem_rev;
78 uint32_t sdth_crt_rev;
81 /* Extended System Description Table */
83 struct acpi_sdth xsdt_hdr;
84 uint64_t xsdt_ents[1];
87 /* Root System Description Table */
89 struct acpi_sdth rsdt_hdr;
90 uint32_t rsdt_ents[1];
93 /* Multiple APIC Description Table */
95 struct acpi_sdth madt_hdr;
96 uint32_t madt_lapic_addr;
101 /* Common parts of MADT APIC structure */
102 struct acpi_madt_ent {
103 uint8_t me_type; /* MADT_ENT_ */
107 #define MADT_ENT_LAPIC 0
108 #define MADT_ENT_IOAPIC 1
110 /* MADT Processor Local APIC */
111 struct acpi_madt_lapic {
112 struct acpi_madt_ent ml_hdr;
115 uint32_t ml_flags; /* MADT_LAPIC_ */
118 #define MADT_LAPIC_ENABLED 0x1
121 struct acpi_madt_ioapic {
122 struct acpi_madt_ent mio_hdr;
124 uint8_t mio_reserved;
126 uint32_t mio_gsi_base;
129 typedef vm_paddr_t (*madt_search_t)(vm_paddr_t);
130 typedef int (*madt_iter_t)(void *,
131 const struct acpi_madt_ent *);
133 static const struct acpi_rsdp *madt_rsdp_search(const uint8_t *, int);
134 static void *madt_sdth_map(vm_paddr_t);
135 static void madt_sdth_unmap(struct acpi_sdth *);
136 static vm_paddr_t madt_search_xsdt(vm_paddr_t);
137 static vm_paddr_t madt_search_rsdt(vm_paddr_t);
138 static int madt_check(vm_paddr_t);
139 static int madt_iterate_entries(struct acpi_madt *,
140 madt_iter_t, void *);
142 extern u_long ebda_addr;
147 const struct acpi_rsdp *rsdp;
148 madt_search_t search;
149 vm_paddr_t search_paddr, madt_paddr;
153 if (ebda_addr != 0) {
154 mapsz = ACPI_RSDP_EBDA_MAPSZ;
155 ptr = pmap_mapdev(ebda_addr, mapsz);
157 rsdp = madt_rsdp_search(ptr, mapsz);
159 kprintf("madt: RSDP not in EBDA\n");
160 pmap_unmapdev((vm_offset_t)ptr, mapsz);
165 kprintf("madt: RSDP in EBDA\n");
170 mapsz = ACPI_RSDP_BIOS_MAPSZ;
171 ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
173 rsdp = madt_rsdp_search(ptr, mapsz);
175 kprintf("madt_probe: no RSDP\n");
176 pmap_unmapdev((vm_offset_t)ptr, mapsz);
179 kprintf("madt: RSDP in BIOS mem\n");
183 if (rsdp->rsdp_rev != 2) {
184 search_paddr = rsdp->rsdp_rsdt;
185 search = madt_search_rsdt;
187 search_paddr = rsdp->rsdp_xsdt;
188 search = madt_search_xsdt;
190 pmap_unmapdev((vm_offset_t)ptr, mapsz);
192 madt_paddr = search(search_paddr);
193 if (madt_paddr == 0) {
194 kprintf("madt_probe: can't locate MADT\n");
198 /* Preliminary checks */
199 if (madt_check(madt_paddr))
204 static const struct acpi_rsdp *
205 madt_rsdp_search(const uint8_t *target, int size)
207 const struct acpi_rsdp *rsdp;
210 KKASSERT(size > sizeof(*rsdp));
212 for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
213 rsdp = (const struct acpi_rsdp *)&target[i];
214 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
215 ACPI_RSDP_SIGLEN) == 0)
222 madt_sdth_map(vm_paddr_t paddr)
224 struct acpi_sdth *sdth;
227 sdth = pmap_mapdev(paddr, sizeof(*sdth));
228 mapsz = sdth->sdth_len;
229 pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
231 if (mapsz < sizeof(*sdth))
234 return pmap_mapdev(paddr, mapsz);
238 madt_sdth_unmap(struct acpi_sdth *sdth)
240 pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
244 madt_search_xsdt(vm_paddr_t xsdt_paddr)
246 struct acpi_xsdt *xsdt;
247 vm_paddr_t madt_paddr = 0;
250 if (xsdt_paddr == 0) {
251 kprintf("madt_search_xsdt: XSDT paddr == 0\n");
255 xsdt = madt_sdth_map(xsdt_paddr);
257 kprintf("madt_search_xsdt: can't map XSDT\n");
261 if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
262 ACPI_SDTH_SIGLEN) != 0) {
263 kprintf("madt_search_xsdt: not XSDT\n");
267 if (xsdt->xsdt_hdr.sdth_rev != 1) {
268 kprintf("madt_search_xsdt: unsupported XSDT revision %d\n",
269 xsdt->xsdt_hdr.sdth_rev);
273 nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
274 sizeof(xsdt->xsdt_ents[0]);
275 for (i = 0; i < nent; ++i) {
276 struct acpi_sdth *sdth;
278 if (xsdt->xsdt_ents[i] == 0)
281 sdth = madt_sdth_map(xsdt->xsdt_ents[i]);
285 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
287 madt_sdth_unmap(sdth);
290 kprintf("madt: MADT in XSDT\n");
291 madt_paddr = xsdt->xsdt_ents[i];
297 madt_sdth_unmap(&xsdt->xsdt_hdr);
302 madt_search_rsdt(vm_paddr_t rsdt_paddr)
304 struct acpi_rsdt *rsdt;
305 vm_paddr_t madt_paddr = 0;
308 if (rsdt_paddr == 0) {
309 kprintf("madt_search_rsdt: RSDT paddr == 0\n");
313 rsdt = madt_sdth_map(rsdt_paddr);
315 kprintf("madt_search_rsdt: can't map RSDT\n");
319 if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
320 ACPI_SDTH_SIGLEN) != 0) {
321 kprintf("madt_search_rsdt: not RSDT\n");
325 if (rsdt->rsdt_hdr.sdth_rev != 1) {
326 kprintf("madt_search_rsdt: unsupported RSDT revision %d\n",
327 rsdt->rsdt_hdr.sdth_rev);
331 nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
332 sizeof(rsdt->rsdt_ents[0]);
333 for (i = 0; i < nent; ++i) {
334 struct acpi_sdth *sdth;
336 if (rsdt->rsdt_ents[i] == 0)
339 sdth = madt_sdth_map(rsdt->rsdt_ents[i]);
343 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
345 madt_sdth_unmap(sdth);
348 kprintf("madt: MADT in RSDT\n");
349 madt_paddr = rsdt->rsdt_ents[i];
355 madt_sdth_unmap(&rsdt->rsdt_hdr);
360 madt_pass1(vm_paddr_t madt_paddr)
362 struct acpi_madt *madt;
363 vm_offset_t lapic_addr;
365 KKASSERT(madt_paddr != 0);
367 madt = madt_sdth_map(madt_paddr);
368 KKASSERT(madt != NULL);
370 kprintf("madt: LAPIC address 0x%08x, flags %#x\n",
371 madt->madt_lapic_addr, madt->madt_flags);
372 lapic_addr = madt->madt_lapic_addr;
374 madt_sdth_unmap(&madt->madt_hdr);
380 madt_pass2(vm_paddr_t madt_paddr, int bsp_apic_id)
382 struct acpi_madt *madt;
383 int size, cur, error, cpu, found_bsp;
385 kprintf("madt: BSP apic id %d\n", bsp_apic_id);
387 KKASSERT(madt_paddr != 0);
389 madt = madt_sdth_map(madt_paddr);
390 KKASSERT(madt != NULL);
392 size = madt->madt_hdr.sdth_len -
393 (sizeof(*madt) - sizeof(madt->madt_ents));
399 while (size - cur > sizeof(struct acpi_madt_ent)) {
400 const struct acpi_madt_ent *ent;
402 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
403 if (ent->me_len < sizeof(*ent)) {
404 kprintf("madt_pass2: invalid MADT entry len %d\n",
409 if (ent->me_len > (size - cur)) {
410 kprintf("madt_pass2: invalid MADT entry len %d, "
411 "> table length\n", ent->me_len);
418 if (ent->me_type == MADT_ENT_LAPIC) {
419 const struct acpi_madt_lapic *lapic_ent;
421 if (ent->me_len < sizeof(*lapic_ent)) {
422 kprintf("madt_pass2: invalid MADT lapic entry "
423 "len %d\n", ent->me_len);
427 lapic_ent = (const struct acpi_madt_lapic *)ent;
428 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
429 kprintf("madt: cpu_id %d, apic_id %d\n",
430 lapic_ent->ml_cpu_id,
431 lapic_ent->ml_apic_id);
432 if (lapic_ent->ml_apic_id == bsp_apic_id) {
434 lapic_ent->ml_apic_id);
438 lapic_ent->ml_apic_id);
445 kprintf("madt_pass2: BSP is not found\n");
449 kprintf("madt_pass2: no APs\n");
455 madt_sdth_unmap(&madt->madt_hdr);
459 struct madt_check_cbarg {
464 madt_check_callback(void *xarg, const struct acpi_madt_ent *ent)
466 struct madt_check_cbarg *arg = xarg;
467 const struct acpi_madt_lapic *lapic_ent;
469 if (ent->me_type != MADT_ENT_LAPIC)
471 lapic_ent = (const struct acpi_madt_lapic *)ent;
473 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED)
479 madt_check(vm_paddr_t madt_paddr)
481 struct madt_check_cbarg arg;
482 struct acpi_madt *madt;
485 KKASSERT(madt_paddr != 0);
487 madt = madt_sdth_map(madt_paddr);
488 KKASSERT(madt != NULL);
490 if (madt->madt_hdr.sdth_rev != 1 && madt->madt_hdr.sdth_rev != 2) {
491 kprintf("madt_check: unsupported MADT revision %d\n",
492 madt->madt_hdr.sdth_rev);
497 if (madt->madt_hdr.sdth_len <
498 sizeof(*madt) - sizeof(madt->madt_ents)) {
499 kprintf("madt_check: invalid MADT length %u\n",
500 madt->madt_hdr.sdth_len);
505 bzero(&arg, sizeof(arg));
506 error = madt_iterate_entries(madt, madt_check_callback, &arg);
508 if (arg.cpu_count <= 1)
512 madt_sdth_unmap(&madt->madt_hdr);
517 madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
519 int size, cur, error;
521 size = madt->madt_hdr.sdth_len -
522 (sizeof(*madt) - sizeof(madt->madt_ents));
526 while (size - cur > sizeof(struct acpi_madt_ent)) {
527 const struct acpi_madt_ent *ent;
529 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
530 if (ent->me_len < sizeof(*ent)) {
531 kprintf("madt_iterate_entries: invalid MADT "
532 "entry len %d\n", ent->me_len);
536 if (ent->me_len > (size - cur)) {
537 kprintf("madt_iterate_entries: invalid MADT "
538 "entry len %d, > table length\n", ent->me_len);
546 * Only Local APIC and I/O APIC are defined in
547 * ACPI specification 1.0 - 3.0
549 switch (ent->me_type) {
551 if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
552 kprintf("madt_iterate_entries: invalid MADT "
553 "lapic entry len %d\n", ent->me_len);
558 case MADT_ENT_IOAPIC:
559 if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
560 kprintf("madt_iterate_entries: invalid MADT "
561 "ioapic entry len %d\n", ent->me_len);
569 error = func(arg, ent);