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>
40 #include <machine/md_var.h>
41 #include <machine/specialreg.h>
43 #define ACPI_RSDP_EBDA_MAPSZ 1024
44 #define ACPI_RSDP_BIOS_MAPSZ 0x20000
45 #define ACPI_RSDP_BIOS_MAPADDR 0xe0000
47 #define ACPI_RSDP_ALIGN 16
49 #define ACPI_RSDP_SIGLEN 8
50 #define ACPI_RSDP_SIG "RSD PTR "
52 #define ACPI_SDTH_SIGLEN 4
53 #define ACPI_RSDT_SIG "RSDT"
54 #define ACPI_XSDT_SIG "XSDT"
55 #define ACPI_MADT_SIG "APIC"
57 /* Root System Description Pointer */
59 uint8_t rsdp_sig[ACPI_RSDP_SIGLEN];
61 uint8_t rsdp_oem_id[6];
66 uint8_t rsdp_ext_cksum;
70 /* System Description Table Header */
72 uint8_t sdth_sig[ACPI_SDTH_SIGLEN];
76 uint8_t sdth_oem_id[6];
77 uint8_t sdth_oem_tbid[8];
78 uint32_t sdth_oem_rev;
80 uint32_t sdth_crt_rev;
83 /* Extended System Description Table */
85 struct acpi_sdth xsdt_hdr;
86 uint64_t xsdt_ents[1];
89 /* Root System Description Table */
91 struct acpi_sdth rsdt_hdr;
92 uint32_t rsdt_ents[1];
95 /* Multiple APIC Description Table */
97 struct acpi_sdth madt_hdr;
98 uint32_t madt_lapic_addr;
100 uint8_t madt_ents[1];
103 /* Common parts of MADT APIC structure */
104 struct acpi_madt_ent {
105 uint8_t me_type; /* MADT_ENT_ */
109 #define MADT_ENT_LAPIC 0
110 #define MADT_ENT_IOAPIC 1
111 #define MADT_ENT_LAPIC_ADDR 5
113 /* MADT Processor Local APIC */
114 struct acpi_madt_lapic {
115 struct acpi_madt_ent ml_hdr;
118 uint32_t ml_flags; /* MADT_LAPIC_ */
121 #define MADT_LAPIC_ENABLED 0x1
124 struct acpi_madt_ioapic {
125 struct acpi_madt_ent mio_hdr;
127 uint8_t mio_reserved;
129 uint32_t mio_gsi_base;
132 /* MADT Local APIC Address Override */
133 struct acpi_madt_lapic_addr {
134 struct acpi_madt_ent mla_hdr;
135 uint16_t mla_reserved;
136 uint64_t mla_lapic_addr;
139 typedef vm_paddr_t (*madt_search_t)(vm_paddr_t);
140 typedef int (*madt_iter_t)(void *,
141 const struct acpi_madt_ent *);
143 static const struct acpi_rsdp *madt_rsdp_search(const uint8_t *, int);
144 static void *madt_sdth_map(vm_paddr_t);
145 static void madt_sdth_unmap(struct acpi_sdth *);
146 static vm_paddr_t madt_search_xsdt(vm_paddr_t);
147 static vm_paddr_t madt_search_rsdt(vm_paddr_t);
148 static int madt_check(vm_paddr_t);
149 static int madt_iterate_entries(struct acpi_madt *,
150 madt_iter_t, void *);
152 extern u_long ebda_addr;
157 const struct acpi_rsdp *rsdp;
158 madt_search_t search;
159 vm_paddr_t search_paddr, madt_paddr;
163 if (ebda_addr != 0) {
164 mapsz = ACPI_RSDP_EBDA_MAPSZ;
165 ptr = pmap_mapdev(ebda_addr, mapsz);
167 rsdp = madt_rsdp_search(ptr, mapsz);
169 kprintf("madt: RSDP not in EBDA\n");
170 pmap_unmapdev((vm_offset_t)ptr, mapsz);
175 kprintf("madt: RSDP in EBDA\n");
180 mapsz = ACPI_RSDP_BIOS_MAPSZ;
181 ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
183 rsdp = madt_rsdp_search(ptr, mapsz);
185 kprintf("madt_probe: no RSDP\n");
186 pmap_unmapdev((vm_offset_t)ptr, mapsz);
189 kprintf("madt: RSDP in BIOS mem\n");
193 if (rsdp->rsdp_rev != 2) {
194 search_paddr = rsdp->rsdp_rsdt;
195 search = madt_search_rsdt;
197 search_paddr = rsdp->rsdp_xsdt;
198 search = madt_search_xsdt;
200 pmap_unmapdev((vm_offset_t)ptr, mapsz);
202 madt_paddr = search(search_paddr);
203 if (madt_paddr == 0) {
204 kprintf("madt_probe: can't locate MADT\n");
208 /* Preliminary checks */
209 if (madt_check(madt_paddr))
214 static const struct acpi_rsdp *
215 madt_rsdp_search(const uint8_t *target, int size)
217 const struct acpi_rsdp *rsdp;
220 KKASSERT(size > sizeof(*rsdp));
222 for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
223 rsdp = (const struct acpi_rsdp *)&target[i];
224 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
225 ACPI_RSDP_SIGLEN) == 0)
232 madt_sdth_map(vm_paddr_t paddr)
234 struct acpi_sdth *sdth;
237 sdth = pmap_mapdev(paddr, sizeof(*sdth));
238 mapsz = sdth->sdth_len;
239 pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
241 if (mapsz < sizeof(*sdth))
244 return pmap_mapdev(paddr, mapsz);
248 madt_sdth_unmap(struct acpi_sdth *sdth)
250 pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
254 madt_search_xsdt(vm_paddr_t xsdt_paddr)
256 struct acpi_xsdt *xsdt;
257 vm_paddr_t madt_paddr = 0;
260 if (xsdt_paddr == 0) {
261 kprintf("madt_search_xsdt: XSDT paddr == 0\n");
265 xsdt = madt_sdth_map(xsdt_paddr);
267 kprintf("madt_search_xsdt: can't map XSDT\n");
271 if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
272 ACPI_SDTH_SIGLEN) != 0) {
273 kprintf("madt_search_xsdt: not XSDT\n");
277 if (xsdt->xsdt_hdr.sdth_rev != 1) {
278 kprintf("madt_search_xsdt: unsupported XSDT revision %d\n",
279 xsdt->xsdt_hdr.sdth_rev);
283 nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
284 sizeof(xsdt->xsdt_ents[0]);
285 for (i = 0; i < nent; ++i) {
286 struct acpi_sdth *sdth;
288 if (xsdt->xsdt_ents[i] == 0)
291 sdth = madt_sdth_map(xsdt->xsdt_ents[i]);
295 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
297 madt_sdth_unmap(sdth);
300 kprintf("madt: MADT in XSDT\n");
301 madt_paddr = xsdt->xsdt_ents[i];
307 madt_sdth_unmap(&xsdt->xsdt_hdr);
312 madt_search_rsdt(vm_paddr_t rsdt_paddr)
314 struct acpi_rsdt *rsdt;
315 vm_paddr_t madt_paddr = 0;
318 if (rsdt_paddr == 0) {
319 kprintf("madt_search_rsdt: RSDT paddr == 0\n");
323 rsdt = madt_sdth_map(rsdt_paddr);
325 kprintf("madt_search_rsdt: can't map RSDT\n");
329 if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
330 ACPI_SDTH_SIGLEN) != 0) {
331 kprintf("madt_search_rsdt: not RSDT\n");
335 if (rsdt->rsdt_hdr.sdth_rev != 1) {
336 kprintf("madt_search_rsdt: unsupported RSDT revision %d\n",
337 rsdt->rsdt_hdr.sdth_rev);
341 nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
342 sizeof(rsdt->rsdt_ents[0]);
343 for (i = 0; i < nent; ++i) {
344 struct acpi_sdth *sdth;
346 if (rsdt->rsdt_ents[i] == 0)
349 sdth = madt_sdth_map(rsdt->rsdt_ents[i]);
353 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
355 madt_sdth_unmap(sdth);
358 kprintf("madt: MADT in RSDT\n");
359 madt_paddr = rsdt->rsdt_ents[i];
365 madt_sdth_unmap(&rsdt->rsdt_hdr);
370 madt_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
372 const struct acpi_madt_lapic_addr *lapic_addr_ent;
373 uint64_t *addr64 = xarg;
375 if (ent->me_type != MADT_ENT_LAPIC_ADDR)
377 if (ent->me_len < sizeof(*lapic_addr_ent)) {
378 kprintf("madt_pass1: invalid LAPIC address override length\n");
381 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
383 *addr64 = lapic_addr_ent->mla_lapic_addr;
388 madt_pass1(vm_paddr_t madt_paddr)
390 struct acpi_madt *madt;
391 vm_offset_t lapic_addr;
392 uint64_t lapic_addr64;
395 KKASSERT(madt_paddr != 0);
397 madt = madt_sdth_map(madt_paddr);
398 KKASSERT(madt != NULL);
400 kprintf("madt: LAPIC address 0x%08x, flags %#x\n",
401 madt->madt_lapic_addr, madt->madt_flags);
402 lapic_addr = madt->madt_lapic_addr;
405 error = madt_iterate_entries(madt, madt_pass1_callback, &lapic_addr64);
407 panic("madt_iterate_entries(pass1) failed\n");
409 if (lapic_addr64 != 0) {
410 kprintf("Warning: 64bits lapic address 0x%llx\n", lapic_addr64);
411 /* XXX vm_offset_t is 32bits on i386 */
412 lapic_addr = lapic_addr64;
415 madt_sdth_unmap(&madt->madt_hdr);
420 struct madt_pass2_cbarg {
427 madt_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
429 const struct acpi_madt_lapic *lapic_ent;
430 struct madt_pass2_cbarg *arg = xarg;
432 if (ent->me_type != MADT_ENT_LAPIC)
435 lapic_ent = (const struct acpi_madt_lapic *)ent;
436 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
437 kprintf("madt: cpu_id %d, apic_id %d\n",
438 lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
439 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
440 mp_set_cpuids(0, lapic_ent->ml_apic_id);
443 mp_set_cpuids(arg->cpu, lapic_ent->ml_apic_id);
451 madt_pass2(vm_paddr_t madt_paddr, int bsp_apic_id)
453 struct acpi_madt *madt;
454 struct madt_pass2_cbarg arg;
457 kprintf("madt: BSP apic id %d\n", bsp_apic_id);
459 KKASSERT(madt_paddr != 0);
461 madt = madt_sdth_map(madt_paddr);
462 KKASSERT(madt != NULL);
464 bzero(&arg, sizeof(arg));
466 arg.bsp_apic_id = bsp_apic_id;
468 error = madt_iterate_entries(madt, madt_pass2_callback, &arg);
470 panic("madt_iterate_entries(pass2) failed\n");
472 KKASSERT(arg.bsp_found);
473 KKASSERT(arg.cpu > 1);
474 mp_naps = arg.cpu - 1; /* exclude BSP */
476 madt_sdth_unmap(&madt->madt_hdr);
481 struct madt_check_cbarg {
488 madt_check_callback(void *xarg, const struct acpi_madt_ent *ent)
490 struct madt_check_cbarg *arg = xarg;
491 const struct acpi_madt_lapic *lapic_ent;
493 if (ent->me_type != MADT_ENT_LAPIC)
495 lapic_ent = (const struct acpi_madt_lapic *)ent;
497 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
499 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
500 if (arg->bsp_found) {
501 kprintf("madt_check: more than one BSP?\n");
511 madt_check(vm_paddr_t madt_paddr)
513 struct madt_check_cbarg arg;
514 struct acpi_madt *madt;
517 KKASSERT(madt_paddr != 0);
519 madt = madt_sdth_map(madt_paddr);
520 KKASSERT(madt != NULL);
522 if (madt->madt_hdr.sdth_rev != 1 && madt->madt_hdr.sdth_rev != 2) {
523 kprintf("madt_check: unsupported MADT revision %d\n",
524 madt->madt_hdr.sdth_rev);
529 if (madt->madt_hdr.sdth_len <
530 sizeof(*madt) - sizeof(madt->madt_ents)) {
531 kprintf("madt_check: invalid MADT length %u\n",
532 madt->madt_hdr.sdth_len);
537 bzero(&arg, sizeof(arg));
538 arg.bsp_apic_id = (cpu_procinfo & CPUID_LOCAL_APIC_ID) >> 24;
540 error = madt_iterate_entries(madt, madt_check_callback, &arg);
542 if (arg.cpu_count <= 1) {
543 kprintf("madt_check: less than 2 CPUs is found\n");
545 } else if (!arg.bsp_found) {
546 kprintf("madt_check: no BSP\n");
551 madt_sdth_unmap(&madt->madt_hdr);
556 madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
558 int size, cur, error;
560 size = madt->madt_hdr.sdth_len -
561 (sizeof(*madt) - sizeof(madt->madt_ents));
565 while (size - cur > sizeof(struct acpi_madt_ent)) {
566 const struct acpi_madt_ent *ent;
568 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
569 if (ent->me_len < sizeof(*ent)) {
570 kprintf("madt_iterate_entries: invalid MADT "
571 "entry len %d\n", ent->me_len);
575 if (ent->me_len > (size - cur)) {
576 kprintf("madt_iterate_entries: invalid MADT "
577 "entry len %d, > table length\n", ent->me_len);
585 * Only Local APIC and I/O APIC are defined in
586 * ACPI specification 1.0 - 3.0
588 switch (ent->me_type) {
590 if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
591 kprintf("madt_iterate_entries: invalid MADT "
592 "lapic entry len %d\n", ent->me_len);
597 case MADT_ENT_IOAPIC:
598 if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
599 kprintf("madt_iterate_entries: invalid MADT "
600 "ioapic entry len %d\n", ent->me_len);
608 error = func(arg, ent);