arch/ia64/kernel/acpi.c

   1 /*
   2  *  acpi.c - Architecture-Specific Low-Level ACPI Support
   3  *
   4  *  Copyright (C) 1999 VA Linux Systems
   5  *  Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
   6  *  Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
   7  *      David Mosberger-Tang <davidm@hpl.hp.com>
   8  *  Copyright (C) 2000 Intel Corp.
   9  *  Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
  10  *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
  11  *  Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
  12  *  Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
  13  *  Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
  14  *
  15  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  16  *
  17  *  This program is free software; you can redistribute it and/or modify
  18  *  it under the terms of the GNU General Public License as published by
  19  *  the Free Software Foundation; either version 2 of the License, or
  20  *  (at your option) any later version.
  21  *
  22  *  This program is distributed in the hope that it will be useful,
  23  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *  GNU General Public License for more details.
  26  *
  27  *  You should have received a copy of the GNU General Public License
  28  *  along with this program; if not, write to the Free Software
  29  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  30  *
  31  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  32  */
  33
  34 #include <linux/config.h>
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/kernel.h>
  38 #include <linux/sched.h>
  39 #include <linux/smp.h>
  40 #include <linux/string.h>
  41 #include <linux/types.h>
  42 #include <linux/irq.h>
  43 #include <linux/acpi.h>
  44 #include <linux/efi.h>
  45 #include <linux/mmzone.h>
  46 #include <asm/io.h>
  47 #include <asm/iosapic.h>
  48 #include <asm/machvec.h>
  49 #include <asm/page.h>
  50 #include <asm/system.h>
  51 #include <asm/numa.h>
  52 #include <asm/sal.h>
  53 #include <asm/cyclone.h>
  54
  55 #define BAD_MADT_ENTRY(entry, end) (                                        \
  56                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  57                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
  58
  59 #define PREFIX                  "ACPI: "
  60
  61 void (*pm_idle) (void);
  62 EXPORT_SYMBOL(pm_idle);
  63 void (*pm_power_off) (void);
  64 EXPORT_SYMBOL(pm_power_off);
  65
  66 unsigned char acpi_kbd_controller_present = 1;
  67 unsigned char acpi_legacy_devices;
  68
  69 #define MAX_SAPICS 256
  70 u16 ia64_acpiid_to_sapicid[MAX_SAPICS] =
  71         { [0 ... MAX_SAPICS - 1] = -1 };
  72 EXPORT_SYMBOL(ia64_acpiid_to_sapicid);
  73
  74 const char *
  75 acpi_get_sysname (void)
  76 {
  77 #ifdef CONFIG_IA64_GENERIC
  78         unsigned long rsdp_phys;
  79         struct acpi20_table_rsdp *rsdp;
  80         struct acpi_table_xsdt *xsdt;
  81         struct acpi_table_header *hdr;
  82
  83         rsdp_phys = acpi_find_rsdp();
  84         if (!rsdp_phys) {
  85                 printk(KERN_ERR "ACPI 2.0 RSDP not found, default to \"dig\"\n");
  86                 return "dig";
  87         }
  88
  89         rsdp = (struct acpi20_table_rsdp *) __va(rsdp_phys);
  90         if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
  91                 printk(KERN_ERR "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
  92                 return "dig";
  93         }
  94
  95         xsdt = (struct acpi_table_xsdt *) __va(rsdp->xsdt_address);
  96         hdr = &xsdt->header;
  97         if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
  98                 printk(KERN_ERR "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
  99                 return "dig";
 100         }
 101
 102         if (!strcmp(hdr->oem_id, "HP")) {
 103                 return "hpzx1";
 104         }
 105         else if (!strcmp(hdr->oem_id, "SGI")) {
 106                 return "sn2";
 107         }
 108
 109         return "dig";
 110 #else
 111 # if defined (CONFIG_IA64_HP_SIM)
 112         return "hpsim";
 113 # elif defined (CONFIG_IA64_HP_ZX1)
 114         return "hpzx1";
 115 # elif defined (CONFIG_IA64_SGI_SN2)
 116         return "sn2";
 117 # elif defined (CONFIG_IA64_DIG)
 118         return "dig";
 119 # else
 120 #       error Unknown platform.  Fix acpi.c.
 121 # endif
 122 #endif
 123 }
 124
 125 #ifdef CONFIG_ACPI_BOOT
 126
 127 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 128
 129 /* Array to record platform interrupt vectors for generic interrupt routing. */
 130 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 131         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 132 };
 133
 134 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 135
 136 /*
 137  * Interrupt routing API for device drivers.  Provides interrupt vector for
 138  * a generic platform event.  Currently only CPEI is implemented.
 139  */
 140 int
 141 acpi_request_vector (u32 int_type)
 142 {
 143         int vector = -1;
 144
 145         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 146                 /* corrected platform error interrupt */
 147                 vector = platform_intr_list[int_type];
 148         } else
 149                 printk(KERN_ERR "acpi_request_vector(): invalid interrupt type\n");
 150         return vector;
 151 }
 152
 153 char *
 154 __acpi_map_table (unsigned long phys_addr, unsigned long size)
 155 {
 156         return __va(phys_addr);
 157 }
 158
 159 /* --------------------------------------------------------------------------
 160                             Boot-time Table Parsing
 161    -------------------------------------------------------------------------- */
 162
 163 static int                      total_cpus __initdata;
 164 static int                      available_cpus __initdata;
 165 struct acpi_table_madt *        acpi_madt __initdata;
 166 static u8                       has_8259;
 167
 168
 169 static int __init
 170 acpi_parse_lapic_addr_ovr (
 171         acpi_table_entry_header *header, const unsigned long end)
 172 {
 173         struct acpi_table_lapic_addr_ovr *lapic;
 174
 175         lapic = (struct acpi_table_lapic_addr_ovr *) header;
 176
 177         if (BAD_MADT_ENTRY(lapic, end))
 178                 return -EINVAL;
 179
 180         if (lapic->address) {
 181                 iounmap(ipi_base_addr);
 182                 ipi_base_addr = ioremap(lapic->address, 0);
 183         }
 184         return 0;
 185 }
 186
 187
 188 static int __init
 189 acpi_parse_lsapic (acpi_table_entry_header *header, const unsigned long end)
 190 {
 191         struct acpi_table_lsapic *lsapic;
 192
 193         lsapic = (struct acpi_table_lsapic *) header;
 194
 195         if (BAD_MADT_ENTRY(lsapic, end))
 196                 return -EINVAL;
 197
 198         if (lsapic->flags.enabled) {
 199 #ifdef CONFIG_SMP
 200                 smp_boot_data.cpu_phys_id[available_cpus] = (lsapic->id << 8) | lsapic->eid;
 201 #endif
 202                 ia64_acpiid_to_sapicid[lsapic->acpi_id] = (lsapic->id << 8) | lsapic->eid;
 203                 ++available_cpus;
 204         }
 205
 206         total_cpus++;
 207         return 0;
 208 }
 209
 210
 211 static int __init
 212 acpi_parse_lapic_nmi (acpi_table_entry_header *header, const unsigned long end)
 213 {
 214         struct acpi_table_lapic_nmi *lacpi_nmi;
 215
 216         lacpi_nmi = (struct acpi_table_lapic_nmi*) header;
 217
 218         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 219                 return -EINVAL;
 220
 221         /* TBD: Support lapic_nmi entries */
 222         return 0;
 223 }
 224
 225
 226 static int __init
 227 acpi_parse_iosapic (acpi_table_entry_header *header, const unsigned long end)
 228 {
 229         struct acpi_table_iosapic *iosapic;
 230
 231         iosapic = (struct acpi_table_iosapic *) header;
 232
 233         if (BAD_MADT_ENTRY(iosapic, end))
 234                 return -EINVAL;
 235
 236         iosapic_init(iosapic->address, iosapic->global_irq_base);
 237
 238         return 0;
 239 }
 240
 241
 242 static int __init
 243 acpi_parse_plat_int_src (
 244         acpi_table_entry_header *header, const unsigned long end)
 245 {
 246         struct acpi_table_plat_int_src *plintsrc;
 247         int vector;
 248
 249         plintsrc = (struct acpi_table_plat_int_src *) header;
 250
 251         if (BAD_MADT_ENTRY(plintsrc, end))
 252                 return -EINVAL;
 253
 254         /*
 255          * Get vector assignment for this interrupt, set attributes,
 256          * and program the IOSAPIC routing table.
 257          */
 258         vector = iosapic_register_platform_intr(plintsrc->type,
 259                                                 plintsrc->global_irq,
 260                                                 plintsrc->iosapic_vector,
 261                                                 plintsrc->eid,
 262                                                 plintsrc->id,
 263                                                 (plintsrc->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 264                                                 (plintsrc->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 265
 266         platform_intr_list[plintsrc->type] = vector;
 267         return 0;
 268 }
 269
 270
 271 static int __init
 272 acpi_parse_int_src_ovr (
 273         acpi_table_entry_header *header, const unsigned long end)
 274 {
 275         struct acpi_table_int_src_ovr *p;
 276
 277         p = (struct acpi_table_int_src_ovr *) header;
 278
 279         if (BAD_MADT_ENTRY(p, end))
 280                 return -EINVAL;
 281
 282         iosapic_override_isa_irq(p->bus_irq, p->global_irq,
 283                                  (p->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 284                                  (p->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 285         return 0;
 286 }
 287
 288
 289 static int __init
 290 acpi_parse_nmi_src (acpi_table_entry_header *header, const unsigned long end)
 291 {
 292         struct acpi_table_nmi_src *nmi_src;
 293
 294         nmi_src = (struct acpi_table_nmi_src*) header;
 295
 296         if (BAD_MADT_ENTRY(nmi_src, end))
 297                 return -EINVAL;
 298
 299         /* TBD: Support nimsrc entries */
 300         return 0;
 301 }
 302
 303 static void __init
 304 acpi_madt_oem_check (char *oem_id, char *oem_table_id)
 305 {
 306         if (!strncmp(oem_id, "IBM", 3) &&
 307             (!strncmp(oem_table_id, "SERMOW", 6))) {
 308
 309                 /*
 310                  * Unfortunately ITC_DRIFT is not yet part of the
 311                  * official SAL spec, so the ITC_DRIFT bit is not
 312                  * set by the BIOS on this hardware.
 313                  */
 314                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 315
 316                 cyclone_setup();
 317         }
 318 }
 319
 320 static int __init
 321 acpi_parse_madt (unsigned long phys_addr, unsigned long size)
 322 {
 323         if (!phys_addr || !size)
 324                 return -EINVAL;
 325
 326         acpi_madt = (struct acpi_table_madt *) __va(phys_addr);
 327
 328         /* remember the value for reference after free_initmem() */
 329 #ifdef CONFIG_ITANIUM
 330         has_8259 = 1; /* Firmware on old Itanium systems is broken */
 331 #else
 332         has_8259 = acpi_madt->flags.pcat_compat;
 333 #endif
 334         iosapic_system_init(has_8259);
 335
 336         /* Get base address of IPI Message Block */
 337
 338         if (acpi_madt->lapic_address)
 339                 ipi_base_addr = ioremap(acpi_madt->lapic_address, 0);
 340
 341         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 342
 343         acpi_madt_oem_check(acpi_madt->header.oem_id,
 344                 acpi_madt->header.oem_table_id);
 345
 346         return 0;
 347 }
 348
 349
 350 #ifdef CONFIG_ACPI_NUMA
 351
 352 #undef SLIT_DEBUG
 353
 354 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 355
 356 static int __initdata srat_num_cpus;                    /* number of cpus */
 357 static u32 __initdata pxm_flag[PXM_FLAG_LEN];
 358 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 359 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 360 /* maps to convert between proximity domain and logical node ID */
 361 int __initdata pxm_to_nid_map[MAX_PXM_DOMAINS];
 362 int __initdata nid_to_pxm_map[MAX_NUMNODES];
 363 static struct acpi_table_slit __initdata *slit_table;
 364
 365 /*
 366  * ACPI 2.0 SLIT (System Locality Information Table)
 367  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 368  */
 369 void __init
 370 acpi_numa_slit_init (struct acpi_table_slit *slit)
 371 {
 372         u32 len;
 373
 374         len = sizeof(struct acpi_table_header) + 8
 375                 + slit->localities * slit->localities;
 376         if (slit->header.length != len) {
 377                 printk(KERN_ERR "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 378                        len, slit->header.length);
 379                 memset(numa_slit, 10, sizeof(numa_slit));
 380                 return;
 381         }
 382         slit_table = slit;
 383 }
 384
 385 void __init
 386 acpi_numa_processor_affinity_init (struct acpi_table_processor_affinity *pa)
 387 {
 388         /* record this node in proximity bitmap */
 389         pxm_bit_set(pa->proximity_domain);
 390
 391         node_cpuid[srat_num_cpus].phys_id = (pa->apic_id << 8) | (pa->lsapic_eid);
 392         /* nid should be overridden as logical node id later */
 393         node_cpuid[srat_num_cpus].nid = pa->proximity_domain;
 394         srat_num_cpus++;
 395 }
 396
 397 void __init
 398 acpi_numa_memory_affinity_init (struct acpi_table_memory_affinity *ma)
 399 {
 400         unsigned long paddr, size;
 401         u8 pxm;
 402         struct node_memblk_s *p, *q, *pend;
 403
 404         pxm = ma->proximity_domain;
 405
 406         /* fill node memory chunk structure */
 407         paddr = ma->base_addr_hi;
 408         paddr = (paddr << 32) | ma->base_addr_lo;
 409         size = ma->length_hi;
 410         size = (size << 32) | ma->length_lo;
 411
 412         /* Ignore disabled entries */
 413         if (!ma->flags.enabled)
 414                 return;
 415
 416         /* record this node in proximity bitmap */
 417         pxm_bit_set(pxm);
 418
 419         /* Insertion sort based on base address */
 420         pend = &node_memblk[num_node_memblks];
 421         for (p = &node_memblk[0]; p < pend; p++) {
 422                 if (paddr < p->start_paddr)
 423                         break;
 424         }
 425         if (p < pend) {
 426                 for (q = pend - 1; q >= p; q--)
 427                         *(q + 1) = *q;
 428         }
 429         p->start_paddr = paddr;
 430         p->size = size;
 431         p->nid = pxm;
 432         num_node_memblks++;
 433 }
 434
 435 void __init
 436 acpi_numa_arch_fixup (void)
 437 {
 438         int i, j, node_from, node_to;
 439
 440         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 441         if (srat_num_cpus == 0) {
 442                 node_set_online(0);
 443                 node_cpuid[0].phys_id = hard_smp_processor_id();
 444                 return;
 445         }
 446
 447         /* calculate total number of nodes in system from PXM bitmap */
 448         numnodes = 0;           /* init total nodes in system */
 449
 450         memset(pxm_to_nid_map, -1, sizeof(pxm_to_nid_map));
 451         memset(nid_to_pxm_map, -1, sizeof(nid_to_pxm_map));
 452         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 453                 if (pxm_bit_test(i)) {
 454                         pxm_to_nid_map[i] = numnodes;
 455                         node_set_online(numnodes);
 456                         nid_to_pxm_map[numnodes++] = i;
 457                 }
 458         }
 459
 460         /* set logical node id in memory chunk structure */
 461         for (i = 0; i < num_node_memblks; i++)
 462                 node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid];
 463
 464         /* assign memory bank numbers for each chunk on each node */
 465         for (i = 0; i < numnodes; i++) {
 466                 int bank;
 467
 468                 bank = 0;
 469                 for (j = 0; j < num_node_memblks; j++)
 470                         if (node_memblk[j].nid == i)
 471                                 node_memblk[j].bank = bank++;
 472         }
 473
 474         /* set logical node id in cpu structure */
 475         for (i = 0; i < srat_num_cpus; i++)
 476                 node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid];
 477
 478         printk(KERN_INFO "Number of logical nodes in system = %d\n", numnodes);
 479         printk(KERN_INFO "Number of memory chunks in system = %d\n", num_node_memblks);
 480
 481         if (!slit_table) return;
 482         memset(numa_slit, -1, sizeof(numa_slit));
 483         for (i=0; i<slit_table->localities; i++) {
 484                 if (!pxm_bit_test(i))
 485                         continue;
 486                 node_from = pxm_to_nid_map[i];
 487                 for (j=0; j<slit_table->localities; j++) {
 488                         if (!pxm_bit_test(j))
 489                                 continue;
 490                         node_to = pxm_to_nid_map[j];
 491                         node_distance(node_from, node_to) =
 492                                 slit_table->entry[i*slit_table->localities + j];
 493                 }
 494         }
 495
 496 #ifdef SLIT_DEBUG
 497         printk("ACPI 2.0 SLIT locality table:\n");
 498         for (i = 0; i < numnodes; i++) {
 499                 for (j = 0; j < numnodes; j++)
 500                         printk("%03d ", node_distance(i,j));
 501                 printk("\n");
 502         }
 503 #endif
 504 }
 505 #endif /* CONFIG_ACPI_NUMA */
 506
 507 unsigned int
 508 acpi_register_gsi (u32 gsi, int edge_level, int active_high_low)
 509 {
 510         if (has_8259 && gsi < 16)
 511                 return isa_irq_to_vector(gsi);
 512
 513         return iosapic_register_intr(gsi,
 514                         (active_high_low == ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 515                         (edge_level == ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 516 }
 517 EXPORT_SYMBOL(acpi_register_gsi);
 518
 519 static int __init
 520 acpi_parse_fadt (unsigned long phys_addr, unsigned long size)
 521 {
 522         struct acpi_table_header *fadt_header;
 523         struct fadt_descriptor_rev2 *fadt;
 524
 525         if (!phys_addr || !size)
 526                 return -EINVAL;
 527
 528         fadt_header = (struct acpi_table_header *) __va(phys_addr);
 529         if (fadt_header->revision != 3)
 530                 return -ENODEV;         /* Only deal with ACPI 2.0 FADT */
 531
 532         fadt = (struct fadt_descriptor_rev2 *) fadt_header;
 533
 534         if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
 535                 acpi_kbd_controller_present = 0;
 536
 537         if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
 538                 acpi_legacy_devices = 1;
 539
 540         acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 541         return 0;
 542 }
 543
 544
 545 unsigned long __init
 546 acpi_find_rsdp (void)
 547 {
 548         unsigned long rsdp_phys = 0;
 549
 550         if (efi.acpi20)
 551                 rsdp_phys = __pa(efi.acpi20);
 552         else if (efi.acpi)
 553                 printk(KERN_WARNING PREFIX "v1.0/r0.71 tables no longer supported\n");
 554         return rsdp_phys;
 555 }
 556
 557
 558 int __init
 559 acpi_boot_init (void)
 560 {
 561
 562         /*
 563          * MADT
 564          * ----
 565          * Parse the Multiple APIC Description Table (MADT), if exists.
 566          * Note that this table provides platform SMP configuration
 567          * information -- the successor to MPS tables.
 568          */
 569
 570         if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
 571                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 572                 goto skip_madt;
 573         }
 574
 575         /* Local APIC */
 576
 577         if (acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
 578                 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
 579
 580         if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS) < 1)
 581                 printk(KERN_ERR PREFIX "Error parsing MADT - no LAPIC entries\n");
 582
 583         if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0) < 0)
 584                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 585
 586         /* I/O APIC */
 587
 588         if (acpi_table_parse_madt(ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
 589                 printk(KERN_ERR PREFIX "Error parsing MADT - no IOSAPIC entries\n");
 590
 591         /* System-Level Interrupt Routing */
 592
 593         if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src, ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 594                 printk(KERN_ERR PREFIX "Error parsing platform interrupt source entry\n");
 595
 596         if (acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
 597                 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
 598
 599         if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
 600                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 601   skip_madt:
 602
 603         /*
 604          * FADT says whether a legacy keyboard controller is present.
 605          * The FADT also contains an SCI_INT line, by which the system
 606          * gets interrupts such as power and sleep buttons.  If it's not
 607          * on a Legacy interrupt, it needs to be setup.
 608          */
 609         if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
 610                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 611
 612 #ifdef CONFIG_SMP
 613         if (available_cpus == 0) {
 614                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 615                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 616                 smp_boot_data.cpu_phys_id[available_cpus] = hard_smp_processor_id();
 617                 available_cpus = 1; /* We've got at least one of these, no? */
 618         }
 619         smp_boot_data.cpu_count = available_cpus;
 620
 621         smp_build_cpu_map();
 622 # ifdef CONFIG_ACPI_NUMA
 623         if (srat_num_cpus == 0) {
 624                 int cpu, i = 1;
 625                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 626                         if (smp_boot_data.cpu_phys_id[cpu] != hard_smp_processor_id())
 627                                 node_cpuid[i++].phys_id = smp_boot_data.cpu_phys_id[cpu];
 628         }
 629         build_cpu_to_node_map();
 630 # endif
 631 #endif
 632         /* Make boot-up look pretty */
 633         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, total_cpus);
 634         return 0;
 635 }
 636
 637 int
 638 acpi_gsi_to_irq (u32 gsi, unsigned int *irq)
 639 {
 640         int vector;
 641
 642         if (has_8259 && gsi < 16)
 643                 *irq = isa_irq_to_vector(gsi);
 644         else {
 645                 vector = gsi_to_vector(gsi);
 646                 if (vector == -1)
 647                         return -1;
 648
 649                 *irq = vector;
 650         }
 651         return 0;
 652 }
 653
 654 #ifdef CONFIG_NUMA
 655 acpi_status __init
 656 acpi_map_iosapic (acpi_handle handle, u32 depth, void *context, void **ret)
 657 {
 658         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 659         union acpi_object *obj;
 660         struct acpi_table_iosapic *iosapic;
 661         unsigned int gsi_base;
 662         int node;
 663
 664         /* Only care about objects w/ a method that returns the MADT */
 665         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 666                 return AE_OK;
 667
 668         if (!buffer.length || !buffer.pointer)
 669                 return AE_OK;
 670
 671         obj = buffer.pointer;
 672         if (obj->type != ACPI_TYPE_BUFFER ||
 673             obj->buffer.length < sizeof(*iosapic)) {
 674                 acpi_os_free(buffer.pointer);
 675                 return AE_OK;
 676         }
 677
 678         iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer;
 679
 680         if (iosapic->header.type != ACPI_MADT_IOSAPIC) {
 681                 acpi_os_free(buffer.pointer);
 682                 return AE_OK;
 683         }
 684
 685         gsi_base = iosapic->global_irq_base;
 686
 687         acpi_os_free(buffer.pointer);
 688         buffer.length = ACPI_ALLOCATE_BUFFER;
 689         buffer.pointer = NULL;
 690
 691         /*
 692          * OK, it's an IOSAPIC MADT entry, look for a _PXM method to tell
 693          * us which node to associate this with.
 694          */
 695         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_PXM", NULL, &buffer)))
 696                 return AE_OK;
 697
 698         if (!buffer.length || !buffer.pointer)
 699                 return AE_OK;
 700
 701         obj = buffer.pointer;
 702
 703         if (obj->type != ACPI_TYPE_INTEGER ||
 704             obj->integer.value >= MAX_PXM_DOMAINS) {
 705                 acpi_os_free(buffer.pointer);
 706                 return AE_OK;
 707         }
 708
 709         node = pxm_to_nid_map[obj->integer.value];
 710         acpi_os_free(buffer.pointer);
 711
 712         if (node >= MAX_NUMNODES || !node_online(node) ||
 713             cpus_empty(node_to_cpumask(node)))
 714                 return AE_OK;
 715
 716         /* We know a gsi to node mapping! */
 717         map_iosapic_to_node(gsi_base, node);
 718         return AE_OK;
 719 }
 720 #endif /* CONFIG_NUMA */
 721 #endif /* CONFIG_ACPI_BOOT */