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  *  Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
  15  *
  16  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License as published by
  20  *  the Free Software Foundation; either version 2 of the License, or
  21  *  (at your option) any later version.
  22  *
  23  *  This program is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with this program; if not, write to the Free Software
  30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  31  *
  32  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  33  */
  34
  35 #include <linux/config.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/kernel.h>
  39 #include <linux/sched.h>
  40 #include <linux/smp.h>
  41 #include <linux/string.h>
  42 #include <linux/types.h>
  43 #include <linux/irq.h>
  44 #include <linux/acpi.h>
  45 #include <linux/efi.h>
  46 #include <linux/mmzone.h>
  47 #include <linux/nodemask.h>
  48 #include <asm/io.h>
  49 #include <asm/iosapic.h>
  50 #include <asm/machvec.h>
  51 #include <asm/page.h>
  52 #include <asm/system.h>
  53 #include <asm/numa.h>
  54 #include <asm/sal.h>
  55 #include <asm/cyclone.h>
  56
  57 #define BAD_MADT_ENTRY(entry, end) (                                        \
  58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  59                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
  60
  61 #define PREFIX                  "ACPI: "
  62
  63 void (*pm_idle) (void);
  64 EXPORT_SYMBOL(pm_idle);
  65 void (*pm_power_off) (void);
  66 EXPORT_SYMBOL(pm_power_off);
  67
  68 unsigned char acpi_kbd_controller_present = 1;
  69 unsigned char acpi_legacy_devices;
  70
  71 static unsigned int __initdata acpi_madt_rev;
  72
  73 unsigned int acpi_cpei_override;
  74 unsigned int acpi_cpei_phys_cpuid;
  75
  76 #define MAX_SAPICS 256
  77 u16 ia64_acpiid_to_sapicid[MAX_SAPICS] = {[0 ... MAX_SAPICS - 1] = -1 };
  78
  79 EXPORT_SYMBOL(ia64_acpiid_to_sapicid);
  80
  81 const char *acpi_get_sysname(void)
  82 {
  83 #ifdef CONFIG_IA64_GENERIC
  84         unsigned long rsdp_phys;
  85         struct acpi20_table_rsdp *rsdp;
  86         struct acpi_table_xsdt *xsdt;
  87         struct acpi_table_header *hdr;
  88
  89         rsdp_phys = acpi_find_rsdp();
  90         if (!rsdp_phys) {
  91                 printk(KERN_ERR
  92                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
  93                 return "dig";
  94         }
  95
  96         rsdp = (struct acpi20_table_rsdp *)__va(rsdp_phys);
  97         if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
  98                 printk(KERN_ERR
  99                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
 100                 return "dig";
 101         }
 102
 103         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_address);
 104         hdr = &xsdt->header;
 105         if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
 106                 printk(KERN_ERR
 107                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 108                 return "dig";
 109         }
 110
 111         if (!strcmp(hdr->oem_id, "HP")) {
 112                 return "hpzx1";
 113         } else if (!strcmp(hdr->oem_id, "SGI")) {
 114                 return "sn2";
 115         }
 116
 117         return "dig";
 118 #else
 119 # if defined (CONFIG_IA64_HP_SIM)
 120         return "hpsim";
 121 # elif defined (CONFIG_IA64_HP_ZX1)
 122         return "hpzx1";
 123 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
 124         return "hpzx1_swiotlb";
 125 # elif defined (CONFIG_IA64_SGI_SN2)
 126         return "sn2";
 127 # elif defined (CONFIG_IA64_DIG)
 128         return "dig";
 129 # else
 130 #       error Unknown platform.  Fix acpi.c.
 131 # endif
 132 #endif
 133 }
 134
 135 #ifdef CONFIG_ACPI
 136
 137 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 138
 139 /* Array to record platform interrupt vectors for generic interrupt routing. */
 140 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 141         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 142 };
 143
 144 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 145
 146 /*
 147  * Interrupt routing API for device drivers.  Provides interrupt vector for
 148  * a generic platform event.  Currently only CPEI is implemented.
 149  */
 150 int acpi_request_vector(u32 int_type)
 151 {
 152         int vector = -1;
 153
 154         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 155                 /* corrected platform error interrupt */
 156                 vector = platform_intr_list[int_type];
 157         } else
 158                 printk(KERN_ERR
 159                        "acpi_request_vector(): invalid interrupt type\n");
 160         return vector;
 161 }
 162
 163 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
 164 {
 165         return __va(phys_addr);
 166 }
 167
 168 /* --------------------------------------------------------------------------
 169                             Boot-time Table Parsing
 170    -------------------------------------------------------------------------- */
 171
 172 static int total_cpus __initdata;
 173 static int available_cpus __initdata;
 174 struct acpi_table_madt *acpi_madt __initdata;
 175 static u8 has_8259;
 176
 177 static int __init
 178 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
 179                           const unsigned long end)
 180 {
 181         struct acpi_table_lapic_addr_ovr *lapic;
 182
 183         lapic = (struct acpi_table_lapic_addr_ovr *)header;
 184
 185         if (BAD_MADT_ENTRY(lapic, end))
 186                 return -EINVAL;
 187
 188         if (lapic->address) {
 189                 iounmap(ipi_base_addr);
 190                 ipi_base_addr = ioremap(lapic->address, 0);
 191         }
 192         return 0;
 193 }
 194
 195 static int __init
 196 acpi_parse_lsapic(acpi_table_entry_header * header, const unsigned long end)
 197 {
 198         struct acpi_table_lsapic *lsapic;
 199
 200         lsapic = (struct acpi_table_lsapic *)header;
 201
 202         if (BAD_MADT_ENTRY(lsapic, end))
 203                 return -EINVAL;
 204
 205         if (lsapic->flags.enabled) {
 206 #ifdef CONFIG_SMP
 207                 smp_boot_data.cpu_phys_id[available_cpus] =
 208                     (lsapic->id << 8) | lsapic->eid;
 209 #endif
 210                 ia64_acpiid_to_sapicid[lsapic->acpi_id] =
 211                     (lsapic->id << 8) | lsapic->eid;
 212                 ++available_cpus;
 213         }
 214
 215         total_cpus++;
 216         return 0;
 217 }
 218
 219 static int __init
 220 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
 221 {
 222         struct acpi_table_lapic_nmi *lacpi_nmi;
 223
 224         lacpi_nmi = (struct acpi_table_lapic_nmi *)header;
 225
 226         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 227                 return -EINVAL;
 228
 229         /* TBD: Support lapic_nmi entries */
 230         return 0;
 231 }
 232
 233 static int __init
 234 acpi_parse_iosapic(acpi_table_entry_header * header, const unsigned long end)
 235 {
 236         struct acpi_table_iosapic *iosapic;
 237
 238         iosapic = (struct acpi_table_iosapic *)header;
 239
 240         if (BAD_MADT_ENTRY(iosapic, end))
 241                 return -EINVAL;
 242
 243         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 244 }
 245
 246 static int __init
 247 acpi_parse_plat_int_src(acpi_table_entry_header * header,
 248                         const unsigned long end)
 249 {
 250         struct acpi_table_plat_int_src *plintsrc;
 251         int vector;
 252
 253         plintsrc = (struct acpi_table_plat_int_src *)header;
 254
 255         if (BAD_MADT_ENTRY(plintsrc, end))
 256                 return -EINVAL;
 257
 258         /*
 259          * Get vector assignment for this interrupt, set attributes,
 260          * and program the IOSAPIC routing table.
 261          */
 262         vector = iosapic_register_platform_intr(plintsrc->type,
 263                                                 plintsrc->global_irq,
 264                                                 plintsrc->iosapic_vector,
 265                                                 plintsrc->eid,
 266                                                 plintsrc->id,
 267                                                 (plintsrc->flags.polarity ==
 268                                                  1) ? IOSAPIC_POL_HIGH :
 269                                                 IOSAPIC_POL_LOW,
 270                                                 (plintsrc->flags.trigger ==
 271                                                  1) ? IOSAPIC_EDGE :
 272                                                 IOSAPIC_LEVEL);
 273
 274         platform_intr_list[plintsrc->type] = vector;
 275         if (acpi_madt_rev > 1) {
 276                 acpi_cpei_override = plintsrc->plint_flags.cpei_override_flag;
 277         }
 278
 279         /*
 280          * Save the physical id, so we can check when its being removed
 281          */
 282         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 283
 284         return 0;
 285 }
 286
 287 unsigned int can_cpei_retarget(void)
 288 {
 289         extern int cpe_vector;
 290
 291         /*
 292          * Only if CPEI is supported and the override flag
 293          * is present, otherwise return that its re-targettable
 294          * if we are in polling mode.
 295          */
 296         if (cpe_vector > 0 && !acpi_cpei_override)
 297                 return 0;
 298         else
 299                 return 1;
 300 }
 301
 302 unsigned int is_cpu_cpei_target(unsigned int cpu)
 303 {
 304         unsigned int logical_id;
 305
 306         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
 307
 308         if (logical_id == cpu)
 309                 return 1;
 310         else
 311                 return 0;
 312 }
 313
 314 void set_cpei_target_cpu(unsigned int cpu)
 315 {
 316         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
 317 }
 318
 319 unsigned int get_cpei_target_cpu(void)
 320 {
 321         return acpi_cpei_phys_cpuid;
 322 }
 323
 324 static int __init
 325 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
 326                        const unsigned long end)
 327 {
 328         struct acpi_table_int_src_ovr *p;
 329
 330         p = (struct acpi_table_int_src_ovr *)header;
 331
 332         if (BAD_MADT_ENTRY(p, end))
 333                 return -EINVAL;
 334
 335         iosapic_override_isa_irq(p->bus_irq, p->global_irq,
 336                                  (p->flags.polarity ==
 337                                   1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 338                                  (p->flags.trigger ==
 339                                   1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 340         return 0;
 341 }
 342
 343 static int __init
 344 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
 345 {
 346         struct acpi_table_nmi_src *nmi_src;
 347
 348         nmi_src = (struct acpi_table_nmi_src *)header;
 349
 350         if (BAD_MADT_ENTRY(nmi_src, end))
 351                 return -EINVAL;
 352
 353         /* TBD: Support nimsrc entries */
 354         return 0;
 355 }
 356
 357 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 358 {
 359         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
 360
 361                 /*
 362                  * Unfortunately ITC_DRIFT is not yet part of the
 363                  * official SAL spec, so the ITC_DRIFT bit is not
 364                  * set by the BIOS on this hardware.
 365                  */
 366                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 367
 368                 cyclone_setup();
 369         }
 370 }
 371
 372 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
 373 {
 374         if (!phys_addr || !size)
 375                 return -EINVAL;
 376
 377         acpi_madt = (struct acpi_table_madt *)__va(phys_addr);
 378
 379         acpi_madt_rev = acpi_madt->header.revision;
 380
 381         /* remember the value for reference after free_initmem() */
 382 #ifdef CONFIG_ITANIUM
 383         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
 384 #else
 385         has_8259 = acpi_madt->flags.pcat_compat;
 386 #endif
 387         iosapic_system_init(has_8259);
 388
 389         /* Get base address of IPI Message Block */
 390
 391         if (acpi_madt->lapic_address)
 392                 ipi_base_addr = ioremap(acpi_madt->lapic_address, 0);
 393
 394         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 395
 396         acpi_madt_oem_check(acpi_madt->header.oem_id,
 397                             acpi_madt->header.oem_table_id);
 398
 399         return 0;
 400 }
 401
 402 #ifdef CONFIG_ACPI_NUMA
 403
 404 #undef SLIT_DEBUG
 405
 406 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 407
 408 static int __initdata srat_num_cpus;    /* number of cpus */
 409 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 410 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 411 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 412 /* maps to convert between proximity domain and logical node ID */
 413 int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
 414 int __initdata nid_to_pxm_map[MAX_NUMNODES];
 415 static struct acpi_table_slit __initdata *slit_table;
 416
 417 /*
 418  * ACPI 2.0 SLIT (System Locality Information Table)
 419  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 420  */
 421 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 422 {
 423         u32 len;
 424
 425         len = sizeof(struct acpi_table_header) + 8
 426             + slit->localities * slit->localities;
 427         if (slit->header.length != len) {
 428                 printk(KERN_ERR
 429                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 430                        len, slit->header.length);
 431                 memset(numa_slit, 10, sizeof(numa_slit));
 432                 return;
 433         }
 434         slit_table = slit;
 435 }
 436
 437 void __init
 438 acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity *pa)
 439 {
 440         /* record this node in proximity bitmap */
 441         pxm_bit_set(pa->proximity_domain);
 442
 443         node_cpuid[srat_num_cpus].phys_id =
 444             (pa->apic_id << 8) | (pa->lsapic_eid);
 445         /* nid should be overridden as logical node id later */
 446         node_cpuid[srat_num_cpus].nid = pa->proximity_domain;
 447         srat_num_cpus++;
 448 }
 449
 450 void __init
 451 acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma)
 452 {
 453         unsigned long paddr, size;
 454         u8 pxm;
 455         struct node_memblk_s *p, *q, *pend;
 456
 457         pxm = ma->proximity_domain;
 458
 459         /* fill node memory chunk structure */
 460         paddr = ma->base_addr_hi;
 461         paddr = (paddr << 32) | ma->base_addr_lo;
 462         size = ma->length_hi;
 463         size = (size << 32) | ma->length_lo;
 464
 465         /* Ignore disabled entries */
 466         if (!ma->flags.enabled)
 467                 return;
 468
 469         /* record this node in proximity bitmap */
 470         pxm_bit_set(pxm);
 471
 472         /* Insertion sort based on base address */
 473         pend = &node_memblk[num_node_memblks];
 474         for (p = &node_memblk[0]; p < pend; p++) {
 475                 if (paddr < p->start_paddr)
 476                         break;
 477         }
 478         if (p < pend) {
 479                 for (q = pend - 1; q >= p; q--)
 480                         *(q + 1) = *q;
 481         }
 482         p->start_paddr = paddr;
 483         p->size = size;
 484         p->nid = pxm;
 485         num_node_memblks++;
 486 }
 487
 488 void __init acpi_numa_arch_fixup(void)
 489 {
 490         int i, j, node_from, node_to;
 491
 492         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 493         if (srat_num_cpus == 0) {
 494                 node_set_online(0);
 495                 node_cpuid[0].phys_id = hard_smp_processor_id();
 496                 return;
 497         }
 498
 499         /*
 500          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 501          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 502          */
 503         /* calculate total number of nodes in system from PXM bitmap */
 504         memset(pxm_to_nid_map, -1, sizeof(pxm_to_nid_map));
 505         memset(nid_to_pxm_map, -1, sizeof(nid_to_pxm_map));
 506         nodes_clear(node_online_map);
 507         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 508                 if (pxm_bit_test(i)) {
 509                         int nid = num_online_nodes();
 510                         pxm_to_nid_map[i] = nid;
 511                         nid_to_pxm_map[nid] = i;
 512                         node_set_online(nid);
 513                 }
 514         }
 515
 516         /* set logical node id in memory chunk structure */
 517         for (i = 0; i < num_node_memblks; i++)
 518                 node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid];
 519
 520         /* assign memory bank numbers for each chunk on each node */
 521         for_each_online_node(i) {
 522                 int bank;
 523
 524                 bank = 0;
 525                 for (j = 0; j < num_node_memblks; j++)
 526                         if (node_memblk[j].nid == i)
 527                                 node_memblk[j].bank = bank++;
 528         }
 529
 530         /* set logical node id in cpu structure */
 531         for (i = 0; i < srat_num_cpus; i++)
 532                 node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid];
 533
 534         printk(KERN_INFO "Number of logical nodes in system = %d\n",
 535                num_online_nodes());
 536         printk(KERN_INFO "Number of memory chunks in system = %d\n",
 537                num_node_memblks);
 538
 539         if (!slit_table)
 540                 return;
 541         memset(numa_slit, -1, sizeof(numa_slit));
 542         for (i = 0; i < slit_table->localities; i++) {
 543                 if (!pxm_bit_test(i))
 544                         continue;
 545                 node_from = pxm_to_nid_map[i];
 546                 for (j = 0; j < slit_table->localities; j++) {
 547                         if (!pxm_bit_test(j))
 548                                 continue;
 549                         node_to = pxm_to_nid_map[j];
 550                         node_distance(node_from, node_to) =
 551                             slit_table->entry[i * slit_table->localities + j];
 552                 }
 553         }
 554
 555 #ifdef SLIT_DEBUG
 556         printk("ACPI 2.0 SLIT locality table:\n");
 557         for_each_online_node(i) {
 558                 for_each_online_node(j)
 559                     printk("%03d ", node_distance(i, j));
 560                 printk("\n");
 561         }
 562 #endif
 563 }
 564 #endif                          /* CONFIG_ACPI_NUMA */
 565
 566 /*
 567  * success: return IRQ number (>=0)
 568  * failure: return < 0
 569  */
 570 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
 571 {
 572         if (has_8259 && gsi < 16)
 573                 return isa_irq_to_vector(gsi);
 574
 575         return iosapic_register_intr(gsi,
 576                                      (active_high_low ==
 577                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
 578                                      IOSAPIC_POL_LOW,
 579                                      (edge_level ==
 580                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
 581                                      IOSAPIC_LEVEL);
 582 }
 583
 584 EXPORT_SYMBOL(acpi_register_gsi);
 585
 586 #ifdef CONFIG_ACPI_DEALLOCATE_IRQ
 587 void acpi_unregister_gsi(u32 gsi)
 588 {
 589         iosapic_unregister_intr(gsi);
 590 }
 591
 592 EXPORT_SYMBOL(acpi_unregister_gsi);
 593 #endif                          /* CONFIG_ACPI_DEALLOCATE_IRQ */
 594
 595 static int __init acpi_parse_fadt(unsigned long phys_addr, unsigned long size)
 596 {
 597         struct acpi_table_header *fadt_header;
 598         struct fadt_descriptor_rev2 *fadt;
 599
 600         if (!phys_addr || !size)
 601                 return -EINVAL;
 602
 603         fadt_header = (struct acpi_table_header *)__va(phys_addr);
 604         if (fadt_header->revision != 3)
 605                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
 606
 607         fadt = (struct fadt_descriptor_rev2 *)fadt_header;
 608
 609         if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
 610                 acpi_kbd_controller_present = 0;
 611
 612         if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
 613                 acpi_legacy_devices = 1;
 614
 615         acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 616         return 0;
 617 }
 618
 619 unsigned long __init acpi_find_rsdp(void)
 620 {
 621         unsigned long rsdp_phys = 0;
 622
 623         if (efi.acpi20)
 624                 rsdp_phys = __pa(efi.acpi20);
 625         else if (efi.acpi)
 626                 printk(KERN_WARNING PREFIX
 627                        "v1.0/r0.71 tables no longer supported\n");
 628         return rsdp_phys;
 629 }
 630
 631 int __init acpi_boot_init(void)
 632 {
 633
 634         /*
 635          * MADT
 636          * ----
 637          * Parse the Multiple APIC Description Table (MADT), if exists.
 638          * Note that this table provides platform SMP configuration
 639          * information -- the successor to MPS tables.
 640          */
 641
 642         if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
 643                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 644                 goto skip_madt;
 645         }
 646
 647         /* Local APIC */
 648
 649         if (acpi_table_parse_madt
 650             (ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
 651                 printk(KERN_ERR PREFIX
 652                        "Error parsing LAPIC address override entry\n");
 653
 654         if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS)
 655             < 1)
 656                 printk(KERN_ERR PREFIX
 657                        "Error parsing MADT - no LAPIC entries\n");
 658
 659         if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0)
 660             < 0)
 661                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 662
 663         /* I/O APIC */
 664
 665         if (acpi_table_parse_madt
 666             (ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
 667                 printk(KERN_ERR PREFIX
 668                        "Error parsing MADT - no IOSAPIC entries\n");
 669
 670         /* System-Level Interrupt Routing */
 671
 672         if (acpi_table_parse_madt
 673             (ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src,
 674              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 675                 printk(KERN_ERR PREFIX
 676                        "Error parsing platform interrupt source entry\n");
 677
 678         if (acpi_table_parse_madt
 679             (ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
 680                 printk(KERN_ERR PREFIX
 681                        "Error parsing interrupt source overrides entry\n");
 682
 683         if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
 684                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 685       skip_madt:
 686
 687         /*
 688          * FADT says whether a legacy keyboard controller is present.
 689          * The FADT also contains an SCI_INT line, by which the system
 690          * gets interrupts such as power and sleep buttons.  If it's not
 691          * on a Legacy interrupt, it needs to be setup.
 692          */
 693         if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
 694                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 695
 696 #ifdef CONFIG_SMP
 697         if (available_cpus == 0) {
 698                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 699                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 700                 smp_boot_data.cpu_phys_id[available_cpus] =
 701                     hard_smp_processor_id();
 702                 available_cpus = 1;     /* We've got at least one of these, no? */
 703         }
 704         smp_boot_data.cpu_count = available_cpus;
 705
 706         smp_build_cpu_map();
 707 # ifdef CONFIG_ACPI_NUMA
 708         if (srat_num_cpus == 0) {
 709                 int cpu, i = 1;
 710                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 711                         if (smp_boot_data.cpu_phys_id[cpu] !=
 712                             hard_smp_processor_id())
 713                                 node_cpuid[i++].phys_id =
 714                                     smp_boot_data.cpu_phys_id[cpu];
 715         }
 716 # endif
 717 #endif
 718 #ifdef CONFIG_ACPI_NUMA
 719         build_cpu_to_node_map();
 720 #endif
 721         /* Make boot-up look pretty */
 722         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 723                total_cpus);
 724         return 0;
 725 }
 726
 727 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 728 {
 729         int vector;
 730
 731         if (has_8259 && gsi < 16)
 732                 *irq = isa_irq_to_vector(gsi);
 733         else {
 734                 vector = gsi_to_vector(gsi);
 735                 if (vector == -1)
 736                         return -1;
 737
 738                 *irq = vector;
 739         }
 740         return 0;
 741 }
 742
 743 /*
 744  *  ACPI based hotplug CPU support
 745  */
 746 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 747 static
 748 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
 749 {
 750 #ifdef CONFIG_ACPI_NUMA
 751         int pxm_id;
 752
 753         pxm_id = acpi_get_pxm(handle);
 754
 755         /*
 756          * Assuming that the container driver would have set the proximity
 757          * domain and would have initialized pxm_to_nid_map[pxm_id] && pxm_flag
 758          */
 759         node_cpuid[cpu].nid = (pxm_id < 0) ? 0 : pxm_to_nid_map[pxm_id];
 760
 761         node_cpuid[cpu].phys_id = physid;
 762 #endif
 763         return (0);
 764 }
 765
 766 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 767 {
 768         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 769         union acpi_object *obj;
 770         struct acpi_table_lsapic *lsapic;
 771         cpumask_t tmp_map;
 772         long physid;
 773         int cpu;
 774
 775         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 776                 return -EINVAL;
 777
 778         if (!buffer.length || !buffer.pointer)
 779                 return -EINVAL;
 780
 781         obj = buffer.pointer;
 782         if (obj->type != ACPI_TYPE_BUFFER ||
 783             obj->buffer.length < sizeof(*lsapic)) {
 784                 acpi_os_free(buffer.pointer);
 785                 return -EINVAL;
 786         }
 787
 788         lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer;
 789
 790         if ((lsapic->header.type != ACPI_MADT_LSAPIC) ||
 791             (!lsapic->flags.enabled)) {
 792                 acpi_os_free(buffer.pointer);
 793                 return -EINVAL;
 794         }
 795
 796         physid = ((lsapic->id << 8) | (lsapic->eid));
 797
 798         acpi_os_free(buffer.pointer);
 799         buffer.length = ACPI_ALLOCATE_BUFFER;
 800         buffer.pointer = NULL;
 801
 802         cpus_complement(tmp_map, cpu_present_map);
 803         cpu = first_cpu(tmp_map);
 804         if (cpu >= NR_CPUS)
 805                 return -EINVAL;
 806
 807         acpi_map_cpu2node(handle, cpu, physid);
 808
 809         cpu_set(cpu, cpu_present_map);
 810         ia64_cpu_to_sapicid[cpu] = physid;
 811         ia64_acpiid_to_sapicid[lsapic->acpi_id] = ia64_cpu_to_sapicid[cpu];
 812
 813         *pcpu = cpu;
 814         return (0);
 815 }
 816
 817 EXPORT_SYMBOL(acpi_map_lsapic);
 818
 819 int acpi_unmap_lsapic(int cpu)
 820 {
 821         int i;
 822
 823         for (i = 0; i < MAX_SAPICS; i++) {
 824                 if (ia64_acpiid_to_sapicid[i] == ia64_cpu_to_sapicid[cpu]) {
 825                         ia64_acpiid_to_sapicid[i] = -1;
 826                         break;
 827                 }
 828         }
 829         ia64_cpu_to_sapicid[cpu] = -1;
 830         cpu_clear(cpu, cpu_present_map);
 831
 832 #ifdef CONFIG_ACPI_NUMA
 833         /* NUMA specific cleanup's */
 834 #endif
 835
 836         return (0);
 837 }
 838
 839 EXPORT_SYMBOL(acpi_unmap_lsapic);
 840 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 841
 842 #ifdef CONFIG_ACPI_NUMA
 843 acpi_status __devinit
 844 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 845 {
 846         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 847         union acpi_object *obj;
 848         struct acpi_table_iosapic *iosapic;
 849         unsigned int gsi_base;
 850         int pxm, node;
 851
 852         /* Only care about objects w/ a method that returns the MADT */
 853         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 854                 return AE_OK;
 855
 856         if (!buffer.length || !buffer.pointer)
 857                 return AE_OK;
 858
 859         obj = buffer.pointer;
 860         if (obj->type != ACPI_TYPE_BUFFER ||
 861             obj->buffer.length < sizeof(*iosapic)) {
 862                 acpi_os_free(buffer.pointer);
 863                 return AE_OK;
 864         }
 865
 866         iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer;
 867
 868         if (iosapic->header.type != ACPI_MADT_IOSAPIC) {
 869                 acpi_os_free(buffer.pointer);
 870                 return AE_OK;
 871         }
 872
 873         gsi_base = iosapic->global_irq_base;
 874
 875         acpi_os_free(buffer.pointer);
 876
 877         /*
 878          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 879          * us which node to associate this with.
 880          */
 881         pxm = acpi_get_pxm(handle);
 882         if (pxm < 0)
 883                 return AE_OK;
 884
 885         node = pxm_to_nid_map[pxm];
 886
 887         if (node >= MAX_NUMNODES || !node_online(node) ||
 888             cpus_empty(node_to_cpumask(node)))
 889                 return AE_OK;
 890
 891         /* We know a gsi to node mapping! */
 892         map_iosapic_to_node(gsi_base, node);
 893         return AE_OK;
 894 }
 895 #endif                          /* CONFIG_NUMA */
 896
 897 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 898 {
 899         int err;
 900
 901         if ((err = iosapic_init(phys_addr, gsi_base)))
 902                 return err;
 903
 904 #if CONFIG_ACPI_NUMA
 905         acpi_map_iosapic(handle, 0, NULL, NULL);
 906 #endif                          /* CONFIG_ACPI_NUMA */
 907
 908         return 0;
 909 }
 910
 911 EXPORT_SYMBOL(acpi_register_ioapic);
 912
 913 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 914 {
 915         return iosapic_remove(gsi_base);
 916 }
 917
 918 EXPORT_SYMBOL(acpi_unregister_ioapic);
 919
 920 #endif                          /* CONFIG_ACPI */