sys/platform/pc32/i386/mp_madt.c

   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/kernel.h>
  37 #include <sys/systm.h>
  38
  39 #include <machine/pmap.h>
  40 #include <machine/smp.h>
  41 #include <machine/md_var.h>
  42 #include <machine/specialreg.h>
  43 #include <machine_base/apic/mpapic.h>
  44
  45 #define MADT_VPRINTF(fmt, arg...) \
  46 do { \
  47         if (bootverbose) \
  48                 kprintf("ACPI MADT: " fmt , ##arg); \
  49 } while (0)
  50
  51 #define ACPI_RSDP_EBDA_MAPSZ    1024
  52 #define ACPI_RSDP_BIOS_MAPSZ    0x20000
  53 #define ACPI_RSDP_BIOS_MAPADDR  0xe0000
  54
  55 #define ACPI_RSDP_ALIGN         16
  56
  57 #define ACPI_RSDP_SIGLEN        8
  58 #define ACPI_RSDP_SIG           "RSD PTR "
  59
  60 #define ACPI_SDTH_SIGLEN        4
  61 #define ACPI_RSDT_SIG           "RSDT"
  62 #define ACPI_XSDT_SIG           "XSDT"
  63 #define ACPI_MADT_SIG           "APIC"
  64
  65 /* Root System Description Pointer */
  66 struct acpi_rsdp {
  67         uint8_t                 rsdp_sig[ACPI_RSDP_SIGLEN];
  68         uint8_t                 rsdp_cksum;
  69         uint8_t                 rsdp_oem_id[6];
  70         uint8_t                 rsdp_rev;
  71         uint32_t                rsdp_rsdt;
  72         uint32_t                rsdp_len;
  73         uint64_t                rsdp_xsdt;
  74         uint8_t                 rsdp_ext_cksum;
  75         uint8_t                 rsdp_rsvd[3];
  76 } __packed;
  77
  78 /* System Description Table Header */
  79 struct acpi_sdth {
  80         uint8_t                 sdth_sig[ACPI_SDTH_SIGLEN];
  81         uint32_t                sdth_len;
  82         uint8_t                 sdth_rev;
  83         uint8_t                 sdth_cksum;
  84         uint8_t                 sdth_oem_id[6];
  85         uint8_t                 sdth_oem_tbid[8];
  86         uint32_t                sdth_oem_rev;
  87         uint32_t                sdth_crt_id;
  88         uint32_t                sdth_crt_rev;
  89 } __packed;
  90
  91 /* Extended System Description Table */
  92 struct acpi_xsdt {
  93         struct acpi_sdth        xsdt_hdr;
  94         uint64_t                xsdt_ents[1];
  95 } __packed;
  96
  97 /* Root System Description Table */
  98 struct acpi_rsdt {
  99         struct acpi_sdth        rsdt_hdr;
 100         uint32_t                rsdt_ents[1];
 101 } __packed;
 102
 103 /* Multiple APIC Description Table */
 104 struct acpi_madt {
 105         struct acpi_sdth        madt_hdr;
 106         uint32_t                madt_lapic_addr;
 107         uint32_t                madt_flags;
 108         uint8_t                 madt_ents[1];
 109 } __packed;
 110
 111 /* Common parts of MADT APIC structure */
 112 struct acpi_madt_ent {
 113         uint8_t                 me_type;        /* MADT_ENT_ */
 114         uint8_t                 me_len;
 115 } __packed;
 116
 117 #define MADT_ENT_LAPIC          0
 118 #define MADT_ENT_IOAPIC         1
 119 #define MADT_ENT_LAPIC_ADDR     5
 120
 121 /* MADT Processor Local APIC */
 122 struct acpi_madt_lapic {
 123         struct acpi_madt_ent    ml_hdr;
 124         uint8_t                 ml_cpu_id;
 125         uint8_t                 ml_apic_id;
 126         uint32_t                ml_flags;       /* MADT_LAPIC_ */
 127 } __packed;
 128
 129 #define MADT_LAPIC_ENABLED      0x1
 130
 131 /* MADT I/O APIC */
 132 struct acpi_madt_ioapic {
 133         struct acpi_madt_ent    mio_hdr;
 134         uint8_t                 mio_apic_id;
 135         uint8_t                 mio_reserved;
 136         uint32_t                mio_addr;
 137         uint32_t                mio_gsi_base;
 138 } __packed;
 139
 140 /* MADT Local APIC Address Override */
 141 struct acpi_madt_lapic_addr {
 142         struct acpi_madt_ent    mla_hdr;
 143         uint16_t                mla_reserved;
 144         uint64_t                mla_lapic_addr;
 145 } __packed;
 146
 147 struct madt_lapic_enumerator {
 148         struct lapic_enumerator enumerator;
 149         vm_paddr_t              madt_paddr;
 150 };
 151
 152 typedef vm_paddr_t              (*madt_search_t)(vm_paddr_t);
 153 typedef int                     (*madt_iter_t)(void *,
 154                                     const struct acpi_madt_ent *);
 155
 156 static const struct acpi_rsdp   *madt_rsdp_search(const uint8_t *, int);
 157 static void                     *madt_sdth_map(vm_paddr_t);
 158 static void                     madt_sdth_unmap(struct acpi_sdth *);
 159 static vm_paddr_t               madt_search_xsdt(vm_paddr_t);
 160 static vm_paddr_t               madt_search_rsdt(vm_paddr_t);
 161 static int                      madt_check(vm_paddr_t);
 162 static int                      madt_iterate_entries(struct acpi_madt *,
 163                                     madt_iter_t, void *);
 164
 165 static vm_paddr_t               madt_probe(void);
 166 static vm_offset_t              madt_pass1(vm_paddr_t);
 167 static int                      madt_pass2(vm_paddr_t, int);
 168
 169 static void                     madt_lapic_enumerate(struct lapic_enumerator *);
 170 static int                      madt_lapic_probe(struct lapic_enumerator *);
 171
 172 extern u_long   ebda_addr;
 173
 174 static vm_paddr_t
 175 madt_probe(void)
 176 {
 177         const struct acpi_rsdp *rsdp;
 178         madt_search_t search;
 179         vm_paddr_t search_paddr, madt_paddr;
 180         vm_size_t mapsz;
 181         uint8_t *ptr;
 182
 183         if (ebda_addr != 0) {
 184                 mapsz = ACPI_RSDP_EBDA_MAPSZ;
 185                 ptr = pmap_mapdev(ebda_addr, mapsz);
 186
 187                 rsdp = madt_rsdp_search(ptr, mapsz);
 188                 if (rsdp == NULL) {
 189                         MADT_VPRINTF("RSDP not in EBDA\n");
 190                         pmap_unmapdev((vm_offset_t)ptr, mapsz);
 191
 192                         ptr = NULL;
 193                         mapsz = 0;
 194                 } else {
 195                         MADT_VPRINTF("RSDP in EBDA\n");
 196                         goto found_rsdp;
 197                 }
 198         }
 199
 200         mapsz = ACPI_RSDP_BIOS_MAPSZ;
 201         ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
 202
 203         rsdp = madt_rsdp_search(ptr, mapsz);
 204         if (rsdp == NULL) {
 205                 kprintf("madt_probe: no RSDP\n");
 206                 pmap_unmapdev((vm_offset_t)ptr, mapsz);
 207                 return 0;
 208         } else {
 209                 MADT_VPRINTF("RSDP in BIOS mem\n");
 210         }
 211
 212 found_rsdp:
 213         if (rsdp->rsdp_rev != 2) {
 214                 search_paddr = rsdp->rsdp_rsdt;
 215                 search = madt_search_rsdt;
 216         } else {
 217                 search_paddr = rsdp->rsdp_xsdt;
 218                 search = madt_search_xsdt;
 219         }
 220         pmap_unmapdev((vm_offset_t)ptr, mapsz);
 221
 222         madt_paddr = search(search_paddr);
 223         if (madt_paddr == 0) {
 224                 kprintf("madt_probe: can't locate MADT\n");
 225                 return 0;
 226         }
 227
 228         /* Preliminary checks */
 229         if (madt_check(madt_paddr))
 230                 return 0;
 231         return madt_paddr;
 232 }
 233
 234 static const struct acpi_rsdp *
 235 madt_rsdp_search(const uint8_t *target, int size)
 236 {
 237         const struct acpi_rsdp *rsdp;
 238         int i;
 239
 240         KKASSERT(size > sizeof(*rsdp));
 241
 242         for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
 243                 rsdp = (const struct acpi_rsdp *)&target[i];
 244                 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
 245                            ACPI_RSDP_SIGLEN) == 0)
 246                         return rsdp;
 247         }
 248         return NULL;
 249 }
 250
 251 static void *
 252 madt_sdth_map(vm_paddr_t paddr)
 253 {
 254         struct acpi_sdth *sdth;
 255         vm_size_t mapsz;
 256
 257         sdth = pmap_mapdev(paddr, sizeof(*sdth));
 258         mapsz = sdth->sdth_len;
 259         pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
 260
 261         if (mapsz < sizeof(*sdth))
 262                 return NULL;
 263
 264         return pmap_mapdev(paddr, mapsz);
 265 }
 266
 267 static void
 268 madt_sdth_unmap(struct acpi_sdth *sdth)
 269 {
 270         pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
 271 }
 272
 273 static vm_paddr_t
 274 madt_search_xsdt(vm_paddr_t xsdt_paddr)
 275 {
 276         struct acpi_xsdt *xsdt;
 277         vm_paddr_t madt_paddr = 0;
 278         int i, nent;
 279
 280         if (xsdt_paddr == 0) {
 281                 kprintf("madt_search_xsdt: XSDT paddr == 0\n");
 282                 return 0;
 283         }
 284
 285         xsdt = madt_sdth_map(xsdt_paddr);
 286         if (xsdt == NULL) {
 287                 kprintf("madt_search_xsdt: can't map XSDT\n");
 288                 return 0;
 289         }
 290
 291         if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
 292                    ACPI_SDTH_SIGLEN) != 0) {
 293                 kprintf("madt_search_xsdt: not XSDT\n");
 294                 goto back;
 295         }
 296
 297         if (xsdt->xsdt_hdr.sdth_rev != 1) {
 298                 kprintf("madt_search_xsdt: unsupported XSDT revision %d\n",
 299                         xsdt->xsdt_hdr.sdth_rev);
 300                 goto back;
 301         }
 302
 303         nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
 304                sizeof(xsdt->xsdt_ents[0]);
 305         for (i = 0; i < nent; ++i) {
 306                 struct acpi_sdth *sdth;
 307
 308                 if (xsdt->xsdt_ents[i] == 0)
 309                         continue;
 310
 311                 sdth = madt_sdth_map(xsdt->xsdt_ents[i]);
 312                 if (sdth != NULL) {
 313                         int ret;
 314
 315                         ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
 316                                      ACPI_SDTH_SIGLEN);
 317                         madt_sdth_unmap(sdth);
 318
 319                         if (ret == 0) {
 320                                 MADT_VPRINTF("MADT in XSDT\n");
 321                                 madt_paddr = xsdt->xsdt_ents[i];
 322                                 break;
 323                         }
 324                 }
 325         }
 326 back:
 327         madt_sdth_unmap(&xsdt->xsdt_hdr);
 328         return madt_paddr;
 329 }
 330
 331 static vm_paddr_t
 332 madt_search_rsdt(vm_paddr_t rsdt_paddr)
 333 {
 334         struct acpi_rsdt *rsdt;
 335         vm_paddr_t madt_paddr = 0;
 336         int i, nent;
 337
 338         if (rsdt_paddr == 0) {
 339                 kprintf("madt_search_rsdt: RSDT paddr == 0\n");
 340                 return 0;
 341         }
 342
 343         rsdt = madt_sdth_map(rsdt_paddr);
 344         if (rsdt == NULL) {
 345                 kprintf("madt_search_rsdt: can't map RSDT\n");
 346                 return 0;
 347         }
 348
 349         if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
 350                    ACPI_SDTH_SIGLEN) != 0) {
 351                 kprintf("madt_search_rsdt: not RSDT\n");
 352                 goto back;
 353         }
 354
 355         if (rsdt->rsdt_hdr.sdth_rev != 1) {
 356                 kprintf("madt_search_rsdt: unsupported RSDT revision %d\n",
 357                         rsdt->rsdt_hdr.sdth_rev);
 358                 goto back;
 359         }
 360
 361         nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
 362                sizeof(rsdt->rsdt_ents[0]);
 363         for (i = 0; i < nent; ++i) {
 364                 struct acpi_sdth *sdth;
 365
 366                 if (rsdt->rsdt_ents[i] == 0)
 367                         continue;
 368
 369                 sdth = madt_sdth_map(rsdt->rsdt_ents[i]);
 370                 if (sdth != NULL) {
 371                         int ret;
 372
 373                         ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
 374                                      ACPI_SDTH_SIGLEN);
 375                         madt_sdth_unmap(sdth);
 376
 377                         if (ret == 0) {
 378                                 MADT_VPRINTF("MADT in RSDT\n");
 379                                 madt_paddr = rsdt->rsdt_ents[i];
 380                                 break;
 381                         }
 382                 }
 383         }
 384 back:
 385         madt_sdth_unmap(&rsdt->rsdt_hdr);
 386         return madt_paddr;
 387 }
 388
 389 static int
 390 madt_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
 391 {
 392         const struct acpi_madt_lapic_addr *lapic_addr_ent;
 393         uint64_t *addr64 = xarg;
 394
 395         if (ent->me_type != MADT_ENT_LAPIC_ADDR)
 396                 return 0;
 397         if (ent->me_len < sizeof(*lapic_addr_ent)) {
 398                 kprintf("madt_pass1: invalid LAPIC address override length\n");
 399                 return 0;
 400         }
 401         lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
 402
 403         *addr64 = lapic_addr_ent->mla_lapic_addr;
 404         return 0;
 405 }
 406
 407 static vm_offset_t
 408 madt_pass1(vm_paddr_t madt_paddr)
 409 {
 410         struct acpi_madt *madt;
 411         vm_offset_t lapic_addr;
 412         uint64_t lapic_addr64;
 413         int error;
 414
 415         KKASSERT(madt_paddr != 0);
 416
 417         madt = madt_sdth_map(madt_paddr);
 418         KKASSERT(madt != NULL);
 419
 420         MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n",
 421                      madt->madt_lapic_addr, madt->madt_flags);
 422         lapic_addr = madt->madt_lapic_addr;
 423
 424         lapic_addr64 = 0;
 425         error = madt_iterate_entries(madt, madt_pass1_callback, &lapic_addr64);
 426         if (error)
 427                 panic("madt_iterate_entries(pass1) failed\n");
 428
 429         if (lapic_addr64 != 0) {
 430                 kprintf("Warning: 64bits lapic address 0x%llx\n", lapic_addr64);
 431                 /* XXX vm_offset_t is 32bits on i386 */
 432                 lapic_addr = lapic_addr64;
 433         }
 434
 435         madt_sdth_unmap(&madt->madt_hdr);
 436
 437         return lapic_addr;
 438 }
 439
 440 struct madt_pass2_cbarg {
 441         int     cpu;
 442         int     bsp_found;
 443         int     bsp_apic_id;
 444 };
 445
 446 static int
 447 madt_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
 448 {
 449         const struct acpi_madt_lapic *lapic_ent;
 450         struct madt_pass2_cbarg *arg = xarg;
 451
 452         if (ent->me_type != MADT_ENT_LAPIC)
 453                 return 0;
 454
 455         lapic_ent = (const struct acpi_madt_lapic *)ent;
 456         if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
 457                 MADT_VPRINTF("cpu_id %d, apic_id %d\n",
 458                              lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
 459                 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
 460                         mp_set_cpuids(0, lapic_ent->ml_apic_id);
 461                         arg->bsp_found = 1;
 462                 } else {
 463                         mp_set_cpuids(arg->cpu, lapic_ent->ml_apic_id);
 464                         arg->cpu++;
 465                 }
 466         }
 467         return 0;
 468 }
 469
 470 static int
 471 madt_pass2(vm_paddr_t madt_paddr, int bsp_apic_id)
 472 {
 473         struct acpi_madt *madt;
 474         struct madt_pass2_cbarg arg;
 475         int error;
 476
 477         MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);
 478
 479         KKASSERT(madt_paddr != 0);
 480
 481         madt = madt_sdth_map(madt_paddr);
 482         KKASSERT(madt != NULL);
 483
 484         bzero(&arg, sizeof(arg));
 485         arg.cpu = 1;
 486         arg.bsp_apic_id = bsp_apic_id;
 487
 488         error = madt_iterate_entries(madt, madt_pass2_callback, &arg);
 489         if (error)
 490                 panic("madt_iterate_entries(pass2) failed\n");
 491
 492         KKASSERT(arg.bsp_found);
 493         KKASSERT(arg.cpu > 1);
 494         mp_naps = arg.cpu - 1; /* exclude BSP */
 495
 496         madt_sdth_unmap(&madt->madt_hdr);
 497
 498         return 0;
 499 }
 500
 501 struct madt_check_cbarg {
 502         int     cpu_count;
 503 };
 504
 505 static int
 506 madt_check_callback(void *xarg, const struct acpi_madt_ent *ent)
 507 {
 508         struct madt_check_cbarg *arg = xarg;
 509         const struct acpi_madt_lapic *lapic_ent;
 510
 511         if (ent->me_type != MADT_ENT_LAPIC)
 512                 return 0;
 513         lapic_ent = (const struct acpi_madt_lapic *)ent;
 514
 515         if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED)
 516                 arg->cpu_count++;
 517         return 0;
 518 }
 519
 520 static int
 521 madt_check(vm_paddr_t madt_paddr)
 522 {
 523         struct madt_check_cbarg arg;
 524         struct acpi_madt *madt;
 525         int error = 0;
 526
 527         KKASSERT(madt_paddr != 0);
 528
 529         madt = madt_sdth_map(madt_paddr);
 530         KKASSERT(madt != NULL);
 531
 532         if (madt->madt_hdr.sdth_rev != 1 && madt->madt_hdr.sdth_rev != 2) {
 533                 kprintf("madt_check: unsupported MADT revision %d\n",
 534                         madt->madt_hdr.sdth_rev);
 535                 error = EOPNOTSUPP;
 536                 goto back;
 537         }
 538
 539         if (madt->madt_hdr.sdth_len <
 540             sizeof(*madt) - sizeof(madt->madt_ents)) {
 541                 kprintf("madt_check: invalid MADT length %u\n",
 542                         madt->madt_hdr.sdth_len);
 543                 error = EINVAL;
 544                 goto back;
 545         }
 546
 547         bzero(&arg, sizeof(arg));
 548
 549         error = madt_iterate_entries(madt, madt_check_callback, &arg);
 550         if (!error) {
 551                 if (arg.cpu_count <= 1) {
 552                         kprintf("madt_check: less than 2 CPUs is found\n");
 553                         error = EOPNOTSUPP;
 554                 }
 555         }
 556 back:
 557         madt_sdth_unmap(&madt->madt_hdr);
 558         return error;
 559 }
 560
 561 static int
 562 madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
 563 {
 564         int size, cur, error;
 565
 566         size = madt->madt_hdr.sdth_len -
 567                (sizeof(*madt) - sizeof(madt->madt_ents));
 568         cur = 0;
 569         error = 0;
 570
 571         while (size - cur > sizeof(struct acpi_madt_ent)) {
 572                 const struct acpi_madt_ent *ent;
 573
 574                 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
 575                 if (ent->me_len < sizeof(*ent)) {
 576                         kprintf("madt_iterate_entries: invalid MADT "
 577                                 "entry len %d\n", ent->me_len);
 578                         error = EINVAL;
 579                         break;
 580                 }
 581                 if (ent->me_len > (size - cur)) {
 582                         kprintf("madt_iterate_entries: invalid MADT "
 583                                 "entry len %d, > table length\n", ent->me_len);
 584                         error = EINVAL;
 585                         break;
 586                 }
 587
 588                 cur += ent->me_len;
 589
 590                 /*
 591                  * Only Local APIC and I/O APIC are defined in
 592                  * ACPI specification 1.0 - 3.0
 593                  */
 594                 switch (ent->me_type) {
 595                 case MADT_ENT_LAPIC:
 596                         if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
 597                                 kprintf("madt_iterate_entries: invalid MADT "
 598                                         "lapic entry len %d\n", ent->me_len);
 599                                 error = EINVAL;
 600                         }
 601                         break;
 602
 603                 case MADT_ENT_IOAPIC:
 604                         if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
 605                                 kprintf("madt_iterate_entries: invalid MADT "
 606                                         "ioapic entry len %d\n", ent->me_len);
 607                                 error = EINVAL;
 608                         }
 609                         break;
 610                 }
 611                 if (error)
 612                         break;
 613
 614                 error = func(arg, ent);
 615                 if (error)
 616                         break;
 617         }
 618         return error;
 619 }
 620
 621 static int
 622 madt_lapic_probe(struct lapic_enumerator *e)
 623 {
 624         vm_paddr_t madt_paddr;
 625
 626         madt_paddr = madt_probe();
 627         if (madt_paddr == 0)
 628                 return ENXIO;
 629
 630         ((struct madt_lapic_enumerator *)e)->madt_paddr = madt_paddr;
 631         return 0;
 632 }
 633
 634 static void
 635 madt_lapic_enumerate(struct lapic_enumerator *e)
 636 {
 637         vm_paddr_t madt_paddr;
 638         vm_offset_t lapic_addr;
 639         int bsp_apic_id;
 640
 641         madt_paddr = ((struct madt_lapic_enumerator *)e)->madt_paddr;
 642         KKASSERT(madt_paddr != 0);
 643
 644         lapic_addr = madt_pass1(madt_paddr);
 645         if (lapic_addr == 0)
 646                 panic("madt_lapic_enumerate no local apic\n");
 647
 648         lapic_map(lapic_addr);
 649
 650         bsp_apic_id = APIC_ID(lapic.id);
 651         if (madt_pass2(madt_paddr, bsp_apic_id))
 652                 panic("mp_enable: madt_pass2 failed\n");
 653 }
 654
 655 static struct madt_lapic_enumerator     madt_lapic_enumerator = {
 656         .enumerator = {
 657                 .lapic_prio = LAPIC_ENUM_PRIO_MADT,
 658                 .lapic_probe = madt_lapic_probe,
 659                 .lapic_enumerate = madt_lapic_enumerate
 660         }
 661 };
 662
 663 static void
 664 madt_apic_register(void)
 665 {
 666         int prio;
 667
 668         prio = LAPIC_ENUM_PRIO_MADT;
 669         kgetenv_int("hw.madt_lapic_prio", &prio);
 670         madt_lapic_enumerator.enumerator.lapic_prio = prio;
 671
 672         lapic_enumerator_register(&madt_lapic_enumerator.enumerator);
 673 }
 674 SYSINIT(madt, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_apic_register, 0);