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   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 <linux/nodemask.h>
  47 #include <asm/io.h>
  48 #include <asm/iosapic.h>
  49 #include <asm/machvec.h>
  50 #include <asm/page.h>
  51 #include <asm/system.h>
  52 #include <asm/numa.h>
  53 #include <asm/sal.h>
  54 #include <asm/cyclone.h>
  55
  56 #define BAD_MADT_ENTRY(entry, end) (                                        \
  57                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  58                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
  59
  60 #define PREFIX                  "ACPI: "
  61
  62 void (*pm_idle) (void);
  63 EXPORT_SYMBOL(pm_idle);
  64 void (*pm_power_off) (void);
  65 EXPORT_SYMBOL(pm_power_off);
  66
  67 unsigned char acpi_kbd_controller_present = 1;
  68 unsigned char acpi_legacy_devices;
  69
  70 #define MAX_SAPICS 256
  71 u16 ia64_acpiid_to_sapicid[MAX_SAPICS] =
  72         { [0 ... MAX_SAPICS - 1] = -1 };
  73 EXPORT_SYMBOL(ia64_acpiid_to_sapicid);
  74
  75 const char *
  76 acpi_get_sysname (void)
  77 {
  78 #ifdef CONFIG_IA64_GENERIC
  79         unsigned long rsdp_phys;
  80         struct acpi20_table_rsdp *rsdp;
  81         struct acpi_table_xsdt *xsdt;
  82         struct acpi_table_header *hdr;
  83
  84         rsdp_phys = acpi_find_rsdp();
  85         if (!rsdp_phys) {
  86                 printk(KERN_ERR "ACPI 2.0 RSDP not found, default to \"dig\"\n");
  87                 return "dig";
  88         }
  89
  90         rsdp = (struct acpi20_table_rsdp *) __va(rsdp_phys);
  91         if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
  92                 printk(KERN_ERR "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
  93                 return "dig";
  94         }
  95
  96         xsdt = (struct acpi_table_xsdt *) __va(rsdp->xsdt_address);
  97         hdr = &xsdt->header;
  98         if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
  99                 printk(KERN_ERR "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 100                 return "dig";
 101         }
 102
 103         if (!strcmp(hdr->oem_id, "HP")) {
 104                 return "hpzx1";
 105         }
 106         else if (!strcmp(hdr->oem_id, "SGI")) {
 107                 return "sn2";
 108         }
 109
 110         return "dig";
 111 #else
 112 # if defined (CONFIG_IA64_HP_SIM)
 113         return "hpsim";
 114 # elif defined (CONFIG_IA64_HP_ZX1)
 115         return "hpzx1";
 116 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
 117         return "hpzx1_swiotlb";
 118 # elif defined (CONFIG_IA64_SGI_SN2)
 119         return "sn2";
 120 # elif defined (CONFIG_IA64_DIG)
 121         return "dig";
 122 # else
 123 #       error Unknown platform.  Fix acpi.c.
 124 # endif
 125 #endif
 126 }
 127
 128 #ifdef CONFIG_ACPI_BOOT
 129
 130 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 131
 132 /* Array to record platform interrupt vectors for generic interrupt routing. */
 133 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 134         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 135 };
 136
 137 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 138
 139 /*
 140  * Interrupt routing API for device drivers.  Provides interrupt vector for
 141  * a generic platform event.  Currently only CPEI is implemented.
 142  */
 143 int
 144 acpi_request_vector (u32 int_type)
 145 {
 146         int vector = -1;
 147
 148         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 149                 /* corrected platform error interrupt */
 150                 vector = platform_intr_list[int_type];
 151         } else
 152                 printk(KERN_ERR "acpi_request_vector(): invalid interrupt type\n");
 153         return vector;
 154 }
 155
 156 char *
 157 __acpi_map_table (unsigned long phys_addr, unsigned long size)
 158 {
 159         return __va(phys_addr);
 160 }
 161
 162 /* --------------------------------------------------------------------------
 163                             Boot-time Table Parsing
 164    -------------------------------------------------------------------------- */
 165
 166 static int                      total_cpus __initdata;
 167 static int                      available_cpus __initdata;
 168 struct acpi_table_madt *        acpi_madt __initdata;
 169 static u8                       has_8259;
 170
 171
 172 static int __init
 173 acpi_parse_lapic_addr_ovr (
 174         acpi_table_entry_header *header, const unsigned long end)
 175 {
 176         struct acpi_table_lapic_addr_ovr *lapic;
 177
 178         lapic = (struct acpi_table_lapic_addr_ovr *) header;
 179
 180         if (BAD_MADT_ENTRY(lapic, end))
 181                 return -EINVAL;
 182
 183         if (lapic->address) {
 184                 iounmap(ipi_base_addr);
 185                 ipi_base_addr = ioremap(lapic->address, 0);
 186         }
 187         return 0;
 188 }
 189
 190
 191 static int __init
 192 acpi_parse_lsapic (acpi_table_entry_header *header, const unsigned long end)
 193 {
 194         struct acpi_table_lsapic *lsapic;
 195
 196         lsapic = (struct acpi_table_lsapic *) header;
 197
 198         if (BAD_MADT_ENTRY(lsapic, end))
 199                 return -EINVAL;
 200
 201         if (lsapic->flags.enabled) {
 202 #ifdef CONFIG_SMP
 203                 smp_boot_data.cpu_phys_id[available_cpus] = (lsapic->id << 8) | lsapic->eid;
 204 #endif
 205                 ia64_acpiid_to_sapicid[lsapic->acpi_id] = (lsapic->id << 8) | lsapic->eid;
 206                 ++available_cpus;
 207         }
 208
 209         total_cpus++;
 210         return 0;
 211 }
 212
 213
 214 static int __init
 215 acpi_parse_lapic_nmi (acpi_table_entry_header *header, const unsigned long end)
 216 {
 217         struct acpi_table_lapic_nmi *lacpi_nmi;
 218
 219         lacpi_nmi = (struct acpi_table_lapic_nmi*) header;
 220
 221         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 222                 return -EINVAL;
 223
 224         /* TBD: Support lapic_nmi entries */
 225         return 0;
 226 }
 227
 228
 229 static int __init
 230 acpi_parse_iosapic (acpi_table_entry_header *header, const unsigned long end)
 231 {
 232         struct acpi_table_iosapic *iosapic;
 233
 234         iosapic = (struct acpi_table_iosapic *) header;
 235
 236         if (BAD_MADT_ENTRY(iosapic, end))
 237                 return -EINVAL;
 238
 239         iosapic_init(iosapic->address, iosapic->global_irq_base);
 240
 241         return 0;
 242 }
 243
 244
 245 static int __init
 246 acpi_parse_plat_int_src (
 247         acpi_table_entry_header *header, const unsigned long end)
 248 {
 249         struct acpi_table_plat_int_src *plintsrc;
 250         int vector;
 251
 252         plintsrc = (struct acpi_table_plat_int_src *) header;
 253
 254         if (BAD_MADT_ENTRY(plintsrc, end))
 255                 return -EINVAL;
 256
 257         /*
 258          * Get vector assignment for this interrupt, set attributes,
 259          * and program the IOSAPIC routing table.
 260          */
 261         vector = iosapic_register_platform_intr(plintsrc->type,
 262                                                 plintsrc->global_irq,
 263                                                 plintsrc->iosapic_vector,
 264                                                 plintsrc->eid,
 265                                                 plintsrc->id,
 266                                                 (plintsrc->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 267                                                 (plintsrc->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 268
 269         platform_intr_list[plintsrc->type] = vector;
 270         return 0;
 271 }
 272
 273
 274 static int __init
 275 acpi_parse_int_src_ovr (
 276         acpi_table_entry_header *header, const unsigned long end)
 277 {
 278         struct acpi_table_int_src_ovr *p;
 279
 280         p = (struct acpi_table_int_src_ovr *) header;
 281
 282         if (BAD_MADT_ENTRY(p, end))
 283                 return -EINVAL;
 284
 285         iosapic_override_isa_irq(p->bus_irq, p->global_irq,
 286                                  (p->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 287                                  (p->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 288         return 0;
 289 }
 290
 291
 292 static int __init
 293 acpi_parse_nmi_src (acpi_table_entry_header *header, const unsigned long end)
 294 {
 295         struct acpi_table_nmi_src *nmi_src;
 296
 297         nmi_src = (struct acpi_table_nmi_src*) header;
 298
 299         if (BAD_MADT_ENTRY(nmi_src, end))
 300                 return -EINVAL;
 301
 302         /* TBD: Support nimsrc entries */
 303         return 0;
 304 }
 305
 306 static void __init
 307 acpi_madt_oem_check (char *oem_id, char *oem_table_id)
 308 {
 309         if (!strncmp(oem_id, "IBM", 3) &&
 310             (!strncmp(oem_table_id, "SERMOW", 6))) {
 311
 312                 /*
 313                  * Unfortunately ITC_DRIFT is not yet part of the
 314                  * official SAL spec, so the ITC_DRIFT bit is not
 315                  * set by the BIOS on this hardware.
 316                  */
 317                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 318
 319                 cyclone_setup();
 320         }
 321 }
 322
 323 static int __init
 324 acpi_parse_madt (unsigned long phys_addr, unsigned long size)
 325 {
 326         if (!phys_addr || !size)
 327                 return -EINVAL;
 328
 329         acpi_madt = (struct acpi_table_madt *) __va(phys_addr);
 330
 331         /* remember the value for reference after free_initmem() */
 332 #ifdef CONFIG_ITANIUM
 333         has_8259 = 1; /* Firmware on old Itanium systems is broken */
 334 #else
 335         has_8259 = acpi_madt->flags.pcat_compat;
 336 #endif
 337         iosapic_system_init(has_8259);
 338
 339         /* Get base address of IPI Message Block */
 340
 341         if (acpi_madt->lapic_address)
 342                 ipi_base_addr = ioremap(acpi_madt->lapic_address, 0);
 343
 344         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 345
 346         acpi_madt_oem_check(acpi_madt->header.oem_id,
 347                 acpi_madt->header.oem_table_id);
 348
 349         return 0;
 350 }
 351
 352
 353 #ifdef CONFIG_ACPI_NUMA
 354
 355 #undef SLIT_DEBUG
 356
 357 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 358
 359 static int __initdata srat_num_cpus;                    /* number of cpus */
 360 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 361 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 362 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 363 /* maps to convert between proximity domain and logical node ID */
 364 int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
 365 int __initdata nid_to_pxm_map[MAX_NUMNODES];
 366 static struct acpi_table_slit __initdata *slit_table;
 367
 368 /*
 369  * ACPI 2.0 SLIT (System Locality Information Table)
 370  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 371  */
 372 void __init
 373 acpi_numa_slit_init (struct acpi_table_slit *slit)
 374 {
 375         u32 len;
 376
 377         len = sizeof(struct acpi_table_header) + 8
 378                 + slit->localities * slit->localities;
 379         if (slit->header.length != len) {
 380                 printk(KERN_ERR "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 381                        len, slit->header.length);
 382                 memset(numa_slit, 10, sizeof(numa_slit));
 383                 return;
 384         }
 385         slit_table = slit;
 386 }
 387
 388 void __init
 389 acpi_numa_processor_affinity_init (struct acpi_table_processor_affinity *pa)
 390 {
 391         /* record this node in proximity bitmap */
 392         pxm_bit_set(pa->proximity_domain);
 393
 394         node_cpuid[srat_num_cpus].phys_id = (pa->apic_id << 8) | (pa->lsapic_eid);
 395         /* nid should be overridden as logical node id later */
 396         node_cpuid[srat_num_cpus].nid = pa->proximity_domain;
 397         srat_num_cpus++;
 398 }
 399
 400 void __init
 401 acpi_numa_memory_affinity_init (struct acpi_table_memory_affinity *ma)
 402 {
 403         unsigned long paddr, size;
 404         u8 pxm;
 405         struct node_memblk_s *p, *q, *pend;
 406
 407         pxm = ma->proximity_domain;
 408
 409         /* fill node memory chunk structure */
 410         paddr = ma->base_addr_hi;
 411         paddr = (paddr << 32) | ma->base_addr_lo;
 412         size = ma->length_hi;
 413         size = (size << 32) | ma->length_lo;
 414
 415         /* Ignore disabled entries */
 416         if (!ma->flags.enabled)
 417                 return;
 418
 419         /* record this node in proximity bitmap */
 420         pxm_bit_set(pxm);
 421
 422         /* Insertion sort based on base address */
 423         pend = &node_memblk[num_node_memblks];
 424         for (p = &node_memblk[0]; p < pend; p++) {
 425                 if (paddr < p->start_paddr)
 426                         break;
 427         }
 428         if (p < pend) {
 429                 for (q = pend - 1; q >= p; q--)
 430                         *(q + 1) = *q;
 431         }
 432         p->start_paddr = paddr;
 433         p->size = size;
 434         p->nid = pxm;
 435         num_node_memblks++;
 436 }
 437
 438 void __init
 439 acpi_numa_arch_fixup (void)
 440 {
 441         int i, j, node_from, node_to;
 442
 443         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 444         if (srat_num_cpus == 0) {
 445                 node_set_online(0);
 446                 node_cpuid[0].phys_id = hard_smp_processor_id();
 447                 return;
 448         }
 449
 450         /*
 451          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 452          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 453          */
 454         /* calculate total number of nodes in system from PXM bitmap */
 455         memset(pxm_to_nid_map, -1, sizeof(pxm_to_nid_map));
 456         memset(nid_to_pxm_map, -1, sizeof(nid_to_pxm_map));
 457         nodes_clear(node_online_map);
 458         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 459                 if (pxm_bit_test(i)) {
 460                         int nid = num_online_nodes();
 461                         pxm_to_nid_map[i] = nid;
 462                         nid_to_pxm_map[nid] = i;
 463                         node_set_online(nid);
 464                 }
 465         }
 466
 467         /* set logical node id in memory chunk structure */
 468         for (i = 0; i < num_node_memblks; i++)
 469                 node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid];
 470
 471         /* assign memory bank numbers for each chunk on each node */
 472         for_each_online_node(i) {
 473                 int bank;
 474
 475                 bank = 0;
 476                 for (j = 0; j < num_node_memblks; j++)
 477                         if (node_memblk[j].nid == i)
 478                                 node_memblk[j].bank = bank++;
 479         }
 480
 481         /* set logical node id in cpu structure */
 482         for (i = 0; i < srat_num_cpus; i++)
 483                 node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid];
 484
 485         printk(KERN_INFO "Number of logical nodes in system = %d\n", num_online_nodes());
 486         printk(KERN_INFO "Number of memory chunks in system = %d\n", num_node_memblks);
 487
 488         if (!slit_table) return;
 489         memset(numa_slit, -1, sizeof(numa_slit));
 490         for (i=0; i<slit_table->localities; i++) {
 491                 if (!pxm_bit_test(i))
 492                         continue;
 493                 node_from = pxm_to_nid_map[i];
 494                 for (j=0; j<slit_table->localities; j++) {
 495                         if (!pxm_bit_test(j))
 496                                 continue;
 497                         node_to = pxm_to_nid_map[j];
 498                         node_distance(node_from, node_to) =
 499                                 slit_table->entry[i*slit_table->localities + j];
 500                 }
 501         }
 502
 503 #ifdef SLIT_DEBUG
 504         printk("ACPI 2.0 SLIT locality table:\n");
 505         for_each_online_node(i) {
 506                 for_each_online_node(j)
 507                         printk("%03d ", node_distance(i,j));
 508                 printk("\n");
 509         }
 510 #endif
 511 }
 512 #endif /* CONFIG_ACPI_NUMA */
 513
 514 unsigned int
 515 acpi_register_gsi (u32 gsi, int edge_level, int active_high_low)
 516 {
 517         if (has_8259 && gsi < 16)
 518                 return isa_irq_to_vector(gsi);
 519
 520         return iosapic_register_intr(gsi,
 521                         (active_high_low == ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 522                         (edge_level == ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 523 }
 524 EXPORT_SYMBOL(acpi_register_gsi);
 525
 526 #ifdef CONFIG_ACPI_DEALLOCATE_IRQ
 527 void
 528 acpi_unregister_gsi (u32 gsi)
 529 {
 530         iosapic_unregister_intr(gsi);
 531 }
 532 EXPORT_SYMBOL(acpi_unregister_gsi);
 533 #endif /* CONFIG_ACPI_DEALLOCATE_IRQ */
 534
 535 static int __init
 536 acpi_parse_fadt (unsigned long phys_addr, unsigned long size)
 537 {
 538         struct acpi_table_header *fadt_header;
 539         struct fadt_descriptor_rev2 *fadt;
 540
 541         if (!phys_addr || !size)
 542                 return -EINVAL;
 543
 544         fadt_header = (struct acpi_table_header *) __va(phys_addr);
 545         if (fadt_header->revision != 3)
 546                 return -ENODEV;         /* Only deal with ACPI 2.0 FADT */
 547
 548         fadt = (struct fadt_descriptor_rev2 *) fadt_header;
 549
 550         if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
 551                 acpi_kbd_controller_present = 0;
 552
 553         if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
 554                 acpi_legacy_devices = 1;
 555
 556         acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 557         return 0;
 558 }
 559
 560
 561 unsigned long __init
 562 acpi_find_rsdp (void)
 563 {
 564         unsigned long rsdp_phys = 0;
 565
 566         if (efi.acpi20)
 567                 rsdp_phys = __pa(efi.acpi20);
 568         else if (efi.acpi)
 569                 printk(KERN_WARNING PREFIX "v1.0/r0.71 tables no longer supported\n");
 570         return rsdp_phys;
 571 }
 572
 573
 574 int __init
 575 acpi_boot_init (void)
 576 {
 577
 578         /*
 579          * MADT
 580          * ----
 581          * Parse the Multiple APIC Description Table (MADT), if exists.
 582          * Note that this table provides platform SMP configuration
 583          * information -- the successor to MPS tables.
 584          */
 585
 586         if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
 587                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 588                 goto skip_madt;
 589         }
 590
 591         /* Local APIC */
 592
 593         if (acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
 594                 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
 595
 596         if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS) < 1)
 597                 printk(KERN_ERR PREFIX "Error parsing MADT - no LAPIC entries\n");
 598
 599         if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0) < 0)
 600                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 601
 602         /* I/O APIC */
 603
 604         if (acpi_table_parse_madt(ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
 605                 printk(KERN_ERR PREFIX "Error parsing MADT - no IOSAPIC entries\n");
 606
 607         /* System-Level Interrupt Routing */
 608
 609         if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src, ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 610                 printk(KERN_ERR PREFIX "Error parsing platform interrupt source entry\n");
 611
 612         if (acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
 613                 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
 614
 615         if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
 616                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 617   skip_madt:
 618
 619         /*
 620          * FADT says whether a legacy keyboard controller is present.
 621          * The FADT also contains an SCI_INT line, by which the system
 622          * gets interrupts such as power and sleep buttons.  If it's not
 623          * on a Legacy interrupt, it needs to be setup.
 624          */
 625         if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
 626                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 627
 628 #ifdef CONFIG_SMP
 629         if (available_cpus == 0) {
 630                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 631                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 632                 smp_boot_data.cpu_phys_id[available_cpus] = hard_smp_processor_id();
 633                 available_cpus = 1; /* We've got at least one of these, no? */
 634         }
 635         smp_boot_data.cpu_count = available_cpus;
 636
 637         smp_build_cpu_map();
 638 # ifdef CONFIG_ACPI_NUMA
 639         if (srat_num_cpus == 0) {
 640                 int cpu, i = 1;
 641                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 642                         if (smp_boot_data.cpu_phys_id[cpu] != hard_smp_processor_id())
 643                                 node_cpuid[i++].phys_id = smp_boot_data.cpu_phys_id[cpu];
 644         }
 645         build_cpu_to_node_map();
 646 # endif
 647 #endif
 648         /* Make boot-up look pretty */
 649         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, total_cpus);
 650         return 0;
 651 }
 652
 653 int
 654 acpi_gsi_to_irq (u32 gsi, unsigned int *irq)
 655 {
 656         int vector;
 657
 658         if (has_8259 && gsi < 16)
 659                 *irq = isa_irq_to_vector(gsi);
 660         else {
 661                 vector = gsi_to_vector(gsi);
 662                 if (vector == -1)
 663                         return -1;
 664
 665                 *irq = vector;
 666         }
 667         return 0;
 668 }
 669
 670 /*
 671  *  ACPI based hotplug CPU support
 672  */
 673 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 674 static
 675 int
 676 acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
 677 {
 678 #ifdef CONFIG_ACPI_NUMA
 679         int                     pxm_id;
 680
 681         pxm_id = acpi_get_pxm(handle);
 682
 683         /*
 684          * Assuming that the container driver would have set the proximity
 685          * domain and would have initialized pxm_to_nid_map[pxm_id] && pxm_flag
 686          */
 687         node_cpuid[cpu].nid = (pxm_id < 0) ? 0:
 688                         pxm_to_nid_map[pxm_id];
 689
 690         node_cpuid[cpu].phys_id =  physid;
 691 #endif
 692         return(0);
 693 }
 694
 695
 696 int
 697 acpi_map_lsapic(acpi_handle handle, int *pcpu)
 698 {
 699         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 700         union acpi_object *obj;
 701         struct acpi_table_lsapic *lsapic;
 702         cpumask_t tmp_map;
 703         long physid;
 704         int cpu;
 705
 706         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 707                 return -EINVAL;
 708
 709         if (!buffer.length ||  !buffer.pointer)
 710                 return -EINVAL;
 711
 712         obj = buffer.pointer;
 713         if (obj->type != ACPI_TYPE_BUFFER ||
 714             obj->buffer.length < sizeof(*lsapic)) {
 715                 acpi_os_free(buffer.pointer);
 716                 return -EINVAL;
 717         }
 718
 719         lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer;
 720
 721         if ((lsapic->header.type != ACPI_MADT_LSAPIC) ||
 722             (!lsapic->flags.enabled)) {
 723                 acpi_os_free(buffer.pointer);
 724                 return -EINVAL;
 725         }
 726
 727         physid = ((lsapic->id <<8) | (lsapic->eid));
 728
 729         acpi_os_free(buffer.pointer);
 730         buffer.length = ACPI_ALLOCATE_BUFFER;
 731         buffer.pointer = NULL;
 732
 733         cpus_complement(tmp_map, cpu_present_map);
 734         cpu = first_cpu(tmp_map);
 735         if(cpu >= NR_CPUS)
 736                 return -EINVAL;
 737
 738         acpi_map_cpu2node(handle, cpu, physid);
 739
 740         cpu_set(cpu, cpu_present_map);
 741         ia64_cpu_to_sapicid[cpu] = physid;
 742         ia64_acpiid_to_sapicid[lsapic->acpi_id] = ia64_cpu_to_sapicid[cpu];
 743
 744         *pcpu = cpu;
 745         return(0);
 746 }
 747 EXPORT_SYMBOL(acpi_map_lsapic);
 748
 749
 750 int
 751 acpi_unmap_lsapic(int cpu)
 752 {
 753         int i;
 754
 755         for (i=0; i<MAX_SAPICS; i++) {
 756                 if (ia64_acpiid_to_sapicid[i] == ia64_cpu_to_sapicid[cpu]) {
 757                         ia64_acpiid_to_sapicid[i] = -1;
 758                         break;
 759                 }
 760         }
 761         ia64_cpu_to_sapicid[cpu] = -1;
 762         cpu_clear(cpu,cpu_present_map);
 763
 764 #ifdef CONFIG_ACPI_NUMA
 765         /* NUMA specific cleanup's */
 766 #endif
 767
 768         return(0);
 769 }
 770 EXPORT_SYMBOL(acpi_unmap_lsapic);
 771 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
 772
 773
 774 #ifdef CONFIG_ACPI_NUMA
 775 acpi_status __init
 776 acpi_map_iosapic (acpi_handle handle, u32 depth, void *context, void **ret)
 777 {
 778         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 779         union acpi_object *obj;
 780         struct acpi_table_iosapic *iosapic;
 781         unsigned int gsi_base;
 782         int pxm, node;
 783
 784         /* Only care about objects w/ a method that returns the MADT */
 785         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 786                 return AE_OK;
 787
 788         if (!buffer.length || !buffer.pointer)
 789                 return AE_OK;
 790
 791         obj = buffer.pointer;
 792         if (obj->type != ACPI_TYPE_BUFFER ||
 793             obj->buffer.length < sizeof(*iosapic)) {
 794                 acpi_os_free(buffer.pointer);
 795                 return AE_OK;
 796         }
 797
 798         iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer;
 799
 800         if (iosapic->header.type != ACPI_MADT_IOSAPIC) {
 801                 acpi_os_free(buffer.pointer);
 802                 return AE_OK;
 803         }
 804
 805         gsi_base = iosapic->global_irq_base;
 806
 807         acpi_os_free(buffer.pointer);
 808
 809         /*
 810          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 811          * us which node to associate this with.
 812          */
 813         pxm = acpi_get_pxm(handle);
 814         if (pxm < 0)
 815                 return AE_OK;
 816
 817         node = pxm_to_nid_map[pxm];
 818
 819         if (node >= MAX_NUMNODES || !node_online(node) ||
 820             cpus_empty(node_to_cpumask(node)))
 821                 return AE_OK;
 822
 823         /* We know a gsi to node mapping! */
 824         map_iosapic_to_node(gsi_base, node);
 825         return AE_OK;
 826 }
 827 #endif /* CONFIG_NUMA */
 828
 829 int
 830 acpi_register_ioapic (acpi_handle handle, u64 phys_addr, u32 gsi_base)
 831 {
 832         /* TBD */
 833         return -EINVAL;
 834 }
 835 EXPORT_SYMBOL(acpi_register_ioapic);
 836
 837 int
 838 acpi_unregister_ioapic (acpi_handle handle, u32 gsi_base)
 839 {
 840         /* TBD */
 841         return -EINVAL;
 842 }
 843 EXPORT_SYMBOL(acpi_unregister_ioapic);
 844
 845 #endif /* CONFIG_ACPI_BOOT */