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] =
  78         { [0 ... MAX_SAPICS - 1] = -1 };
  79 EXPORT_SYMBOL(ia64_acpiid_to_sapicid);
  80
  81 const char *
  82 acpi_get_sysname (void)
  83 {
  84 #ifdef CONFIG_IA64_GENERIC
  85         unsigned long rsdp_phys;
  86         struct acpi20_table_rsdp *rsdp;
  87         struct acpi_table_xsdt *xsdt;
  88         struct acpi_table_header *hdr;
  89
  90         rsdp_phys = acpi_find_rsdp();
  91         if (!rsdp_phys) {
  92                 printk(KERN_ERR "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 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
  99                 return "dig";
 100         }
 101
 102         xsdt = (struct acpi_table_xsdt *) __va(rsdp->xsdt_address);
 103         hdr = &xsdt->header;
 104         if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
 105                 printk(KERN_ERR "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 106                 return "dig";
 107         }
 108
 109         if (!strcmp(hdr->oem_id, "HP")) {
 110                 return "hpzx1";
 111         }
 112         else if (!strcmp(hdr->oem_id, "SGI")) {
 113                 return "sn2";
 114         }
 115
 116         return "dig";
 117 #else
 118 # if defined (CONFIG_IA64_HP_SIM)
 119         return "hpsim";
 120 # elif defined (CONFIG_IA64_HP_ZX1)
 121         return "hpzx1";
 122 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
 123         return "hpzx1_swiotlb";
 124 # elif defined (CONFIG_IA64_SGI_SN2)
 125         return "sn2";
 126 # elif defined (CONFIG_IA64_DIG)
 127         return "dig";
 128 # else
 129 #       error Unknown platform.  Fix acpi.c.
 130 # endif
 131 #endif
 132 }
 133
 134 #ifdef CONFIG_ACPI_BOOT
 135
 136 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 137
 138 /* Array to record platform interrupt vectors for generic interrupt routing. */
 139 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 140         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 141 };
 142
 143 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 144
 145 /*
 146  * Interrupt routing API for device drivers.  Provides interrupt vector for
 147  * a generic platform event.  Currently only CPEI is implemented.
 148  */
 149 int
 150 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 "acpi_request_vector(): invalid interrupt type\n");
 159         return vector;
 160 }
 161
 162 char *
 163 __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
 178 static int __init
 179 acpi_parse_lapic_addr_ovr (
 180         acpi_table_entry_header *header, const unsigned long end)
 181 {
 182         struct acpi_table_lapic_addr_ovr *lapic;
 183
 184         lapic = (struct acpi_table_lapic_addr_ovr *) header;
 185
 186         if (BAD_MADT_ENTRY(lapic, end))
 187                 return -EINVAL;
 188
 189         if (lapic->address) {
 190                 iounmap(ipi_base_addr);
 191                 ipi_base_addr = ioremap(lapic->address, 0);
 192         }
 193         return 0;
 194 }
 195
 196
 197 static int __init
 198 acpi_parse_lsapic (acpi_table_entry_header *header, const unsigned long end)
 199 {
 200         struct acpi_table_lsapic *lsapic;
 201
 202         lsapic = (struct acpi_table_lsapic *) header;
 203
 204         if (BAD_MADT_ENTRY(lsapic, end))
 205                 return -EINVAL;
 206
 207         if (lsapic->flags.enabled) {
 208 #ifdef CONFIG_SMP
 209                 smp_boot_data.cpu_phys_id[available_cpus] = (lsapic->id << 8) | lsapic->eid;
 210 #endif
 211                 ia64_acpiid_to_sapicid[lsapic->acpi_id] = (lsapic->id << 8) | lsapic->eid;
 212                 ++available_cpus;
 213         }
 214
 215         total_cpus++;
 216         return 0;
 217 }
 218
 219
 220 static int __init
 221 acpi_parse_lapic_nmi (acpi_table_entry_header *header, const unsigned long end)
 222 {
 223         struct acpi_table_lapic_nmi *lacpi_nmi;
 224
 225         lacpi_nmi = (struct acpi_table_lapic_nmi*) header;
 226
 227         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 228                 return -EINVAL;
 229
 230         /* TBD: Support lapic_nmi entries */
 231         return 0;
 232 }
 233
 234
 235 static int __init
 236 acpi_parse_iosapic (acpi_table_entry_header *header, const unsigned long end)
 237 {
 238         struct acpi_table_iosapic *iosapic;
 239
 240         iosapic = (struct acpi_table_iosapic *) header;
 241
 242         if (BAD_MADT_ENTRY(iosapic, end))
 243                 return -EINVAL;
 244
 245         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 246 }
 247
 248
 249 static int __init
 250 acpi_parse_plat_int_src (
 251         acpi_table_entry_header *header, const unsigned long end)
 252 {
 253         struct acpi_table_plat_int_src *plintsrc;
 254         int vector;
 255
 256         plintsrc = (struct acpi_table_plat_int_src *) header;
 257
 258         if (BAD_MADT_ENTRY(plintsrc, end))
 259                 return -EINVAL;
 260
 261         /*
 262          * Get vector assignment for this interrupt, set attributes,
 263          * and program the IOSAPIC routing table.
 264          */
 265         vector = iosapic_register_platform_intr(plintsrc->type,
 266                                                 plintsrc->global_irq,
 267                                                 plintsrc->iosapic_vector,
 268                                                 plintsrc->eid,
 269                                                 plintsrc->id,
 270                                                 (plintsrc->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 271                                                 (plintsrc->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 272
 273         platform_intr_list[plintsrc->type] = vector;
 274         if (acpi_madt_rev > 1) {
 275                 acpi_cpei_override = plintsrc->plint_flags.cpei_override_flag;
 276         }
 277
 278         /*
 279          * Save the physical id, so we can check when its being removed
 280          */
 281         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 282
 283         return 0;
 284 }
 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 (
 326         acpi_table_entry_header *header, 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 == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 337                                  (p->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 338         return 0;
 339 }
 340
 341
 342 static int __init
 343 acpi_parse_nmi_src (acpi_table_entry_header *header, const unsigned long end)
 344 {
 345         struct acpi_table_nmi_src *nmi_src;
 346
 347         nmi_src = (struct acpi_table_nmi_src*) header;
 348
 349         if (BAD_MADT_ENTRY(nmi_src, end))
 350                 return -EINVAL;
 351
 352         /* TBD: Support nimsrc entries */
 353         return 0;
 354 }
 355
 356 static void __init
 357 acpi_madt_oem_check (char *oem_id, char *oem_table_id)
 358 {
 359         if (!strncmp(oem_id, "IBM", 3) &&
 360             (!strncmp(oem_table_id, "SERMOW", 6))) {
 361
 362                 /*
 363                  * Unfortunately ITC_DRIFT is not yet part of the
 364                  * official SAL spec, so the ITC_DRIFT bit is not
 365                  * set by the BIOS on this hardware.
 366                  */
 367                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 368
 369                 cyclone_setup();
 370         }
 371 }
 372
 373 static int __init
 374 acpi_parse_madt (unsigned long phys_addr, unsigned long size)
 375 {
 376         if (!phys_addr || !size)
 377                 return -EINVAL;
 378
 379         acpi_madt = (struct acpi_table_madt *) __va(phys_addr);
 380
 381         acpi_madt_rev = acpi_madt->header.revision;
 382
 383         /* remember the value for reference after free_initmem() */
 384 #ifdef CONFIG_ITANIUM
 385         has_8259 = 1; /* Firmware on old Itanium systems is broken */
 386 #else
 387         has_8259 = acpi_madt->flags.pcat_compat;
 388 #endif
 389         iosapic_system_init(has_8259);
 390
 391         /* Get base address of IPI Message Block */
 392
 393         if (acpi_madt->lapic_address)
 394                 ipi_base_addr = ioremap(acpi_madt->lapic_address, 0);
 395
 396         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 397
 398         acpi_madt_oem_check(acpi_madt->header.oem_id,
 399                 acpi_madt->header.oem_table_id);
 400
 401         return 0;
 402 }
 403
 404
 405 #ifdef CONFIG_ACPI_NUMA
 406
 407 #undef SLIT_DEBUG
 408
 409 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 410
 411 static int __initdata srat_num_cpus;                    /* number of cpus */
 412 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 413 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 414 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 415 /* maps to convert between proximity domain and logical node ID */
 416 int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
 417 int __initdata nid_to_pxm_map[MAX_NUMNODES];
 418 static struct acpi_table_slit __initdata *slit_table;
 419
 420 /*
 421  * ACPI 2.0 SLIT (System Locality Information Table)
 422  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 423  */
 424 void __init
 425 acpi_numa_slit_init (struct acpi_table_slit *slit)
 426 {
 427         u32 len;
 428
 429         len = sizeof(struct acpi_table_header) + 8
 430                 + slit->localities * slit->localities;
 431         if (slit->header.length != len) {
 432                 printk(KERN_ERR "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 433                        len, slit->header.length);
 434                 memset(numa_slit, 10, sizeof(numa_slit));
 435                 return;
 436         }
 437         slit_table = slit;
 438 }
 439
 440 void __init
 441 acpi_numa_processor_affinity_init (struct acpi_table_processor_affinity *pa)
 442 {
 443         /* record this node in proximity bitmap */
 444         pxm_bit_set(pa->proximity_domain);
 445
 446         node_cpuid[srat_num_cpus].phys_id = (pa->apic_id << 8) | (pa->lsapic_eid);
 447         /* nid should be overridden as logical node id later */
 448         node_cpuid[srat_num_cpus].nid = pa->proximity_domain;
 449         srat_num_cpus++;
 450 }
 451
 452 void __init
 453 acpi_numa_memory_affinity_init (struct acpi_table_memory_affinity *ma)
 454 {
 455         unsigned long paddr, size;
 456         u8 pxm;
 457         struct node_memblk_s *p, *q, *pend;
 458
 459         pxm = ma->proximity_domain;
 460
 461         /* fill node memory chunk structure */
 462         paddr = ma->base_addr_hi;
 463         paddr = (paddr << 32) | ma->base_addr_lo;
 464         size = ma->length_hi;
 465         size = (size << 32) | ma->length_lo;
 466
 467         /* Ignore disabled entries */
 468         if (!ma->flags.enabled)
 469                 return;
 470
 471         /* record this node in proximity bitmap */
 472         pxm_bit_set(pxm);
 473
 474         /* Insertion sort based on base address */
 475         pend = &node_memblk[num_node_memblks];
 476         for (p = &node_memblk[0]; p < pend; p++) {
 477                 if (paddr < p->start_paddr)
 478                         break;
 479         }
 480         if (p < pend) {
 481                 for (q = pend - 1; q >= p; q--)
 482                         *(q + 1) = *q;
 483         }
 484         p->start_paddr = paddr;
 485         p->size = size;
 486         p->nid = pxm;
 487         num_node_memblks++;
 488 }
 489
 490 void __init
 491 acpi_numa_arch_fixup (void)
 492 {
 493         int i, j, node_from, node_to;
 494
 495         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 496         if (srat_num_cpus == 0) {
 497                 node_set_online(0);
 498                 node_cpuid[0].phys_id = hard_smp_processor_id();
 499                 return;
 500         }
 501
 502         /*
 503          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 504          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 505          */
 506         /* calculate total number of nodes in system from PXM bitmap */
 507         memset(pxm_to_nid_map, -1, sizeof(pxm_to_nid_map));
 508         memset(nid_to_pxm_map, -1, sizeof(nid_to_pxm_map));
 509         nodes_clear(node_online_map);
 510         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 511                 if (pxm_bit_test(i)) {
 512                         int nid = num_online_nodes();
 513                         pxm_to_nid_map[i] = nid;
 514                         nid_to_pxm_map[nid] = i;
 515                         node_set_online(nid);
 516                 }
 517         }
 518
 519         /* set logical node id in memory chunk structure */
 520         for (i = 0; i < num_node_memblks; i++)
 521                 node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid];
 522
 523         /* assign memory bank numbers for each chunk on each node */
 524         for_each_online_node(i) {
 525                 int bank;
 526
 527                 bank = 0;
 528                 for (j = 0; j < num_node_memblks; j++)
 529                         if (node_memblk[j].nid == i)
 530                                 node_memblk[j].bank = bank++;
 531         }
 532
 533         /* set logical node id in cpu structure */
 534         for (i = 0; i < srat_num_cpus; i++)
 535                 node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid];
 536
 537         printk(KERN_INFO "Number of logical nodes in system = %d\n", num_online_nodes());
 538         printk(KERN_INFO "Number of memory chunks in system = %d\n", num_node_memblks);
 539
 540         if (!slit_table) 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
 571 acpi_register_gsi (u32 gsi, int edge_level, int active_high_low)
 572 {
 573         if (has_8259 && gsi < 16)
 574                 return isa_irq_to_vector(gsi);
 575
 576         return iosapic_register_intr(gsi,
 577                         (active_high_low == ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 578                         (edge_level == ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 579 }
 580 EXPORT_SYMBOL(acpi_register_gsi);
 581
 582 #ifdef CONFIG_ACPI_DEALLOCATE_IRQ
 583 void
 584 acpi_unregister_gsi (u32 gsi)
 585 {
 586         iosapic_unregister_intr(gsi);
 587 }
 588 EXPORT_SYMBOL(acpi_unregister_gsi);
 589 #endif /* CONFIG_ACPI_DEALLOCATE_IRQ */
 590
 591 static int __init
 592 acpi_parse_fadt (unsigned long phys_addr, unsigned long size)
 593 {
 594         struct acpi_table_header *fadt_header;
 595         struct fadt_descriptor_rev2 *fadt;
 596
 597         if (!phys_addr || !size)
 598                 return -EINVAL;
 599
 600         fadt_header = (struct acpi_table_header *) __va(phys_addr);
 601         if (fadt_header->revision != 3)
 602                 return -ENODEV;         /* Only deal with ACPI 2.0 FADT */
 603
 604         fadt = (struct fadt_descriptor_rev2 *) fadt_header;
 605
 606         if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
 607                 acpi_kbd_controller_present = 0;
 608
 609         if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
 610                 acpi_legacy_devices = 1;
 611
 612         acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 613         return 0;
 614 }
 615
 616
 617 unsigned long __init
 618 acpi_find_rsdp (void)
 619 {
 620         unsigned long rsdp_phys = 0;
 621
 622         if (efi.acpi20)
 623                 rsdp_phys = __pa(efi.acpi20);
 624         else if (efi.acpi)
 625                 printk(KERN_WARNING PREFIX "v1.0/r0.71 tables no longer supported\n");
 626         return rsdp_phys;
 627 }
 628
 629
 630 int __init
 631 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(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
 650                 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
 651
 652         if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS) < 1)
 653                 printk(KERN_ERR PREFIX "Error parsing MADT - no LAPIC entries\n");
 654
 655         if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0) < 0)
 656                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 657
 658         /* I/O APIC */
 659
 660         if (acpi_table_parse_madt(ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
 661                 printk(KERN_ERR PREFIX "Error parsing MADT - no IOSAPIC entries\n");
 662
 663         /* System-Level Interrupt Routing */
 664
 665         if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src, ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 666                 printk(KERN_ERR PREFIX "Error parsing platform interrupt source entry\n");
 667
 668         if (acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
 669                 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
 670
 671         if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
 672                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 673   skip_madt:
 674
 675         /*
 676          * FADT says whether a legacy keyboard controller is present.
 677          * The FADT also contains an SCI_INT line, by which the system
 678          * gets interrupts such as power and sleep buttons.  If it's not
 679          * on a Legacy interrupt, it needs to be setup.
 680          */
 681         if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
 682                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 683
 684 #ifdef CONFIG_SMP
 685         if (available_cpus == 0) {
 686                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 687                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 688                 smp_boot_data.cpu_phys_id[available_cpus] = hard_smp_processor_id();
 689                 available_cpus = 1; /* We've got at least one of these, no? */
 690         }
 691         smp_boot_data.cpu_count = available_cpus;
 692
 693         smp_build_cpu_map();
 694 # ifdef CONFIG_ACPI_NUMA
 695         if (srat_num_cpus == 0) {
 696                 int cpu, i = 1;
 697                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 698                         if (smp_boot_data.cpu_phys_id[cpu] != hard_smp_processor_id())
 699                                 node_cpuid[i++].phys_id = smp_boot_data.cpu_phys_id[cpu];
 700         }
 701 # endif
 702 #endif
 703 #ifdef CONFIG_ACPI_NUMA
 704         build_cpu_to_node_map();
 705 #endif
 706         /* Make boot-up look pretty */
 707         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, total_cpus);
 708         return 0;
 709 }
 710
 711 int
 712 acpi_gsi_to_irq (u32 gsi, unsigned int *irq)
 713 {
 714         int vector;
 715
 716         if (has_8259 && gsi < 16)
 717                 *irq = isa_irq_to_vector(gsi);
 718         else {
 719                 vector = gsi_to_vector(gsi);
 720                 if (vector == -1)
 721                         return -1;
 722
 723                 *irq = vector;
 724         }
 725         return 0;
 726 }
 727
 728 /*
 729  *  ACPI based hotplug CPU support
 730  */
 731 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 732 static
 733 int
 734 acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
 735 {
 736 #ifdef CONFIG_ACPI_NUMA
 737         int                     pxm_id;
 738
 739         pxm_id = acpi_get_pxm(handle);
 740
 741         /*
 742          * Assuming that the container driver would have set the proximity
 743          * domain and would have initialized pxm_to_nid_map[pxm_id] && pxm_flag
 744          */
 745         node_cpuid[cpu].nid = (pxm_id < 0) ? 0:
 746                         pxm_to_nid_map[pxm_id];
 747
 748         node_cpuid[cpu].phys_id =  physid;
 749 #endif
 750         return(0);
 751 }
 752
 753
 754 int
 755 acpi_map_lsapic(acpi_handle handle, int *pcpu)
 756 {
 757         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 758         union acpi_object *obj;
 759         struct acpi_table_lsapic *lsapic;
 760         cpumask_t tmp_map;
 761         long physid;
 762         int cpu;
 763
 764         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 765                 return -EINVAL;
 766
 767         if (!buffer.length ||  !buffer.pointer)
 768                 return -EINVAL;
 769
 770         obj = buffer.pointer;
 771         if (obj->type != ACPI_TYPE_BUFFER ||
 772             obj->buffer.length < sizeof(*lsapic)) {
 773                 acpi_os_free(buffer.pointer);
 774                 return -EINVAL;
 775         }
 776
 777         lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer;
 778
 779         if ((lsapic->header.type != ACPI_MADT_LSAPIC) ||
 780             (!lsapic->flags.enabled)) {
 781                 acpi_os_free(buffer.pointer);
 782                 return -EINVAL;
 783         }
 784
 785         physid = ((lsapic->id <<8) | (lsapic->eid));
 786
 787         acpi_os_free(buffer.pointer);
 788         buffer.length = ACPI_ALLOCATE_BUFFER;
 789         buffer.pointer = NULL;
 790
 791         cpus_complement(tmp_map, cpu_present_map);
 792         cpu = first_cpu(tmp_map);
 793         if(cpu >= NR_CPUS)
 794                 return -EINVAL;
 795
 796         acpi_map_cpu2node(handle, cpu, physid);
 797
 798         cpu_set(cpu, cpu_present_map);
 799         ia64_cpu_to_sapicid[cpu] = physid;
 800         ia64_acpiid_to_sapicid[lsapic->acpi_id] = ia64_cpu_to_sapicid[cpu];
 801
 802         *pcpu = cpu;
 803         return(0);
 804 }
 805 EXPORT_SYMBOL(acpi_map_lsapic);
 806
 807
 808 int
 809 acpi_unmap_lsapic(int cpu)
 810 {
 811         int i;
 812
 813         for (i=0; i<MAX_SAPICS; i++) {
 814                 if (ia64_acpiid_to_sapicid[i] == ia64_cpu_to_sapicid[cpu]) {
 815                         ia64_acpiid_to_sapicid[i] = -1;
 816                         break;
 817                 }
 818         }
 819         ia64_cpu_to_sapicid[cpu] = -1;
 820         cpu_clear(cpu,cpu_present_map);
 821
 822 #ifdef CONFIG_ACPI_NUMA
 823         /* NUMA specific cleanup's */
 824 #endif
 825
 826         return(0);
 827 }
 828 EXPORT_SYMBOL(acpi_unmap_lsapic);
 829 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
 830
 831
 832 #ifdef CONFIG_ACPI_NUMA
 833 acpi_status __devinit
 834 acpi_map_iosapic (acpi_handle handle, u32 depth, void *context, void **ret)
 835 {
 836         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 837         union acpi_object *obj;
 838         struct acpi_table_iosapic *iosapic;
 839         unsigned int gsi_base;
 840         int pxm, node;
 841
 842         /* Only care about objects w/ a method that returns the MADT */
 843         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 844                 return AE_OK;
 845
 846         if (!buffer.length || !buffer.pointer)
 847                 return AE_OK;
 848
 849         obj = buffer.pointer;
 850         if (obj->type != ACPI_TYPE_BUFFER ||
 851             obj->buffer.length < sizeof(*iosapic)) {
 852                 acpi_os_free(buffer.pointer);
 853                 return AE_OK;
 854         }
 855
 856         iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer;
 857
 858         if (iosapic->header.type != ACPI_MADT_IOSAPIC) {
 859                 acpi_os_free(buffer.pointer);
 860                 return AE_OK;
 861         }
 862
 863         gsi_base = iosapic->global_irq_base;
 864
 865         acpi_os_free(buffer.pointer);
 866
 867         /*
 868          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 869          * us which node to associate this with.
 870          */
 871         pxm = acpi_get_pxm(handle);
 872         if (pxm < 0)
 873                 return AE_OK;
 874
 875         node = pxm_to_nid_map[pxm];
 876
 877         if (node >= MAX_NUMNODES || !node_online(node) ||
 878             cpus_empty(node_to_cpumask(node)))
 879                 return AE_OK;
 880
 881         /* We know a gsi to node mapping! */
 882         map_iosapic_to_node(gsi_base, node);
 883         return AE_OK;
 884 }
 885 #endif /* CONFIG_NUMA */
 886
 887 int
 888 acpi_register_ioapic (acpi_handle handle, u64 phys_addr, u32 gsi_base)
 889 {
 890         int err;
 891
 892         if ((err = iosapic_init(phys_addr, gsi_base)))
 893                 return err;
 894
 895 #if CONFIG_ACPI_NUMA
 896         acpi_map_iosapic(handle, 0, NULL, NULL);
 897 #endif /* CONFIG_ACPI_NUMA */
 898
 899         return 0;
 900 }
 901 EXPORT_SYMBOL(acpi_register_ioapic);
 902
 903 int
 904 acpi_unregister_ioapic (acpi_handle handle, u32 gsi_base)
 905 {
 906         return iosapic_remove(gsi_base);
 907 }
 908 EXPORT_SYMBOL(acpi_unregister_ioapic);
 909
 910 #endif /* CONFIG_ACPI_BOOT */