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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  *  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/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                 ((struct acpi_subtable_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 int acpi_cpei_override;
  68 unsigned int acpi_cpei_phys_cpuid;
  69
  70 unsigned long acpi_wakeup_address = 0;
  71
  72 #ifdef CONFIG_IA64_GENERIC
  73 static unsigned long __init acpi_find_rsdp(void)
  74 {
  75         unsigned long rsdp_phys = 0;
  76
  77         if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
  78                 rsdp_phys = efi.acpi20;
  79         else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
  80                 printk(KERN_WARNING PREFIX
  81                        "v1.0/r0.71 tables no longer supported\n");
  82         return rsdp_phys;
  83 }
  84 #endif
  85
  86 const char __init *
  87 acpi_get_sysname(void)
  88 {
  89 #ifdef CONFIG_IA64_GENERIC
  90         unsigned long rsdp_phys;
  91         struct acpi_table_rsdp *rsdp;
  92         struct acpi_table_xsdt *xsdt;
  93         struct acpi_table_header *hdr;
  94
  95         rsdp_phys = acpi_find_rsdp();
  96         if (!rsdp_phys) {
  97                 printk(KERN_ERR
  98                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
  99                 return "dig";
 100         }
 101
 102         rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
 103         if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
 104                 printk(KERN_ERR
 105                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
 106                 return "dig";
 107         }
 108
 109         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
 110         hdr = &xsdt->header;
 111         if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
 112                 printk(KERN_ERR
 113                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 114                 return "dig";
 115         }
 116
 117         if (!strcmp(hdr->oem_id, "HP")) {
 118                 return "hpzx1";
 119         } else if (!strcmp(hdr->oem_id, "SGI")) {
 120                 if (!strcmp(hdr->oem_table_id + 4, "UV"))
 121                         return "uv";
 122                 else
 123                         return "sn2";
 124         }
 125
 126         return "dig";
 127 #else
 128 # if defined (CONFIG_IA64_HP_SIM)
 129         return "hpsim";
 130 # elif defined (CONFIG_IA64_HP_ZX1)
 131         return "hpzx1";
 132 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
 133         return "hpzx1_swiotlb";
 134 # elif defined (CONFIG_IA64_SGI_SN2)
 135         return "sn2";
 136 # elif defined (CONFIG_IA64_SGI_UV)
 137         return "uv";
 138 # elif defined (CONFIG_IA64_DIG)
 139         return "dig";
 140 # else
 141 #       error Unknown platform.  Fix acpi.c.
 142 # endif
 143 #endif
 144 }
 145
 146 #ifdef CONFIG_ACPI
 147
 148 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 149
 150 /* Array to record platform interrupt vectors for generic interrupt routing. */
 151 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 152         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 153 };
 154
 155 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 156
 157 /*
 158  * Interrupt routing API for device drivers.  Provides interrupt vector for
 159  * a generic platform event.  Currently only CPEI is implemented.
 160  */
 161 int acpi_request_vector(u32 int_type)
 162 {
 163         int vector = -1;
 164
 165         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 166                 /* corrected platform error interrupt */
 167                 vector = platform_intr_list[int_type];
 168         } else
 169                 printk(KERN_ERR
 170                        "acpi_request_vector(): invalid interrupt type\n");
 171         return vector;
 172 }
 173
 174 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
 175 {
 176         return __va(phys_addr);
 177 }
 178
 179 /* --------------------------------------------------------------------------
 180                             Boot-time Table Parsing
 181    -------------------------------------------------------------------------- */
 182
 183 static int total_cpus __initdata;
 184 static int available_cpus __initdata;
 185 struct acpi_table_madt *acpi_madt __initdata;
 186 static u8 has_8259;
 187
 188 static int __init
 189 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 190                           const unsigned long end)
 191 {
 192         struct acpi_madt_local_apic_override *lapic;
 193
 194         lapic = (struct acpi_madt_local_apic_override *)header;
 195
 196         if (BAD_MADT_ENTRY(lapic, end))
 197                 return -EINVAL;
 198
 199         if (lapic->address) {
 200                 iounmap(ipi_base_addr);
 201                 ipi_base_addr = ioremap(lapic->address, 0);
 202         }
 203         return 0;
 204 }
 205
 206 static int __init
 207 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
 208 {
 209         struct acpi_madt_local_sapic *lsapic;
 210
 211         lsapic = (struct acpi_madt_local_sapic *)header;
 212
 213         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
 214
 215         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
 216 #ifdef CONFIG_SMP
 217                 smp_boot_data.cpu_phys_id[available_cpus] =
 218                     (lsapic->id << 8) | lsapic->eid;
 219 #endif
 220                 ++available_cpus;
 221         }
 222
 223         total_cpus++;
 224         return 0;
 225 }
 226
 227 static int __init
 228 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 229 {
 230         struct acpi_madt_local_apic_nmi *lacpi_nmi;
 231
 232         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
 233
 234         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 235                 return -EINVAL;
 236
 237         /* TBD: Support lapic_nmi entries */
 238         return 0;
 239 }
 240
 241 static int __init
 242 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
 243 {
 244         struct acpi_madt_io_sapic *iosapic;
 245
 246         iosapic = (struct acpi_madt_io_sapic *)header;
 247
 248         if (BAD_MADT_ENTRY(iosapic, end))
 249                 return -EINVAL;
 250
 251         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 252 }
 253
 254 static unsigned int __initdata acpi_madt_rev;
 255
 256 static int __init
 257 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
 258                         const unsigned long end)
 259 {
 260         struct acpi_madt_interrupt_source *plintsrc;
 261         int vector;
 262
 263         plintsrc = (struct acpi_madt_interrupt_source *)header;
 264
 265         if (BAD_MADT_ENTRY(plintsrc, end))
 266                 return -EINVAL;
 267
 268         /*
 269          * Get vector assignment for this interrupt, set attributes,
 270          * and program the IOSAPIC routing table.
 271          */
 272         vector = iosapic_register_platform_intr(plintsrc->type,
 273                                                 plintsrc->global_irq,
 274                                                 plintsrc->io_sapic_vector,
 275                                                 plintsrc->eid,
 276                                                 plintsrc->id,
 277                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 278                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 279                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 280                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 281                                                  ACPI_MADT_TRIGGER_EDGE) ?
 282                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
 283
 284         platform_intr_list[plintsrc->type] = vector;
 285         if (acpi_madt_rev > 1) {
 286                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
 287         }
 288
 289         /*
 290          * Save the physical id, so we can check when its being removed
 291          */
 292         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 293
 294         return 0;
 295 }
 296
 297 #ifdef CONFIG_HOTPLUG_CPU
 298 unsigned int can_cpei_retarget(void)
 299 {
 300         extern int cpe_vector;
 301         extern unsigned int force_cpei_retarget;
 302
 303         /*
 304          * Only if CPEI is supported and the override flag
 305          * is present, otherwise return that its re-targettable
 306          * if we are in polling mode.
 307          */
 308         if (cpe_vector > 0) {
 309                 if (acpi_cpei_override || force_cpei_retarget)
 310                         return 1;
 311                 else
 312                         return 0;
 313         }
 314         return 1;
 315 }
 316
 317 unsigned int is_cpu_cpei_target(unsigned int cpu)
 318 {
 319         unsigned int logical_id;
 320
 321         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
 322
 323         if (logical_id == cpu)
 324                 return 1;
 325         else
 326                 return 0;
 327 }
 328
 329 void set_cpei_target_cpu(unsigned int cpu)
 330 {
 331         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
 332 }
 333 #endif
 334
 335 unsigned int get_cpei_target_cpu(void)
 336 {
 337         return acpi_cpei_phys_cpuid;
 338 }
 339
 340 static int __init
 341 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 342                        const unsigned long end)
 343 {
 344         struct acpi_madt_interrupt_override *p;
 345
 346         p = (struct acpi_madt_interrupt_override *)header;
 347
 348         if (BAD_MADT_ENTRY(p, end))
 349                 return -EINVAL;
 350
 351         iosapic_override_isa_irq(p->source_irq, p->global_irq,
 352                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 353                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 354                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 355                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 356                                  ACPI_MADT_TRIGGER_EDGE) ?
 357                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
 358         return 0;
 359 }
 360
 361 static int __init
 362 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 363 {
 364         struct acpi_madt_nmi_source *nmi_src;
 365
 366         nmi_src = (struct acpi_madt_nmi_source *)header;
 367
 368         if (BAD_MADT_ENTRY(nmi_src, end))
 369                 return -EINVAL;
 370
 371         /* TBD: Support nimsrc entries */
 372         return 0;
 373 }
 374
 375 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 376 {
 377         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
 378
 379                 /*
 380                  * Unfortunately ITC_DRIFT is not yet part of the
 381                  * official SAL spec, so the ITC_DRIFT bit is not
 382                  * set by the BIOS on this hardware.
 383                  */
 384                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 385
 386                 cyclone_setup();
 387         }
 388 }
 389
 390 static int __init acpi_parse_madt(struct acpi_table_header *table)
 391 {
 392         if (!table)
 393                 return -EINVAL;
 394
 395         acpi_madt = (struct acpi_table_madt *)table;
 396
 397         acpi_madt_rev = acpi_madt->header.revision;
 398
 399         /* remember the value for reference after free_initmem() */
 400 #ifdef CONFIG_ITANIUM
 401         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
 402 #else
 403         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
 404 #endif
 405         iosapic_system_init(has_8259);
 406
 407         /* Get base address of IPI Message Block */
 408
 409         if (acpi_madt->address)
 410                 ipi_base_addr = ioremap(acpi_madt->address, 0);
 411
 412         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 413
 414         acpi_madt_oem_check(acpi_madt->header.oem_id,
 415                             acpi_madt->header.oem_table_id);
 416
 417         return 0;
 418 }
 419
 420 #ifdef CONFIG_ACPI_NUMA
 421
 422 #undef SLIT_DEBUG
 423
 424 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 425
 426 static int __initdata srat_num_cpus;    /* number of cpus */
 427 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 428 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 429 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 430 static struct acpi_table_slit __initdata *slit_table;
 431 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
 432
 433 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
 434 {
 435         int pxm;
 436
 437         pxm = pa->proximity_domain_lo;
 438         if (ia64_platform_is("sn2"))
 439                 pxm += pa->proximity_domain_hi[0] << 8;
 440         return pxm;
 441 }
 442
 443 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
 444 {
 445         int pxm;
 446
 447         pxm = ma->proximity_domain;
 448         if (!ia64_platform_is("sn2"))
 449                 pxm &= 0xff;
 450
 451         return pxm;
 452 }
 453
 454 /*
 455  * ACPI 2.0 SLIT (System Locality Information Table)
 456  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 457  */
 458 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 459 {
 460         u32 len;
 461
 462         len = sizeof(struct acpi_table_header) + 8
 463             + slit->locality_count * slit->locality_count;
 464         if (slit->header.length != len) {
 465                 printk(KERN_ERR
 466                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 467                        len, slit->header.length);
 468                 return;
 469         }
 470         slit_table = slit;
 471 }
 472
 473 void __init
 474 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
 475 {
 476         int pxm;
 477
 478         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
 479                 return;
 480
 481         pxm = get_processor_proximity_domain(pa);
 482
 483         /* record this node in proximity bitmap */
 484         pxm_bit_set(pxm);
 485
 486         node_cpuid[srat_num_cpus].phys_id =
 487             (pa->apic_id << 8) | (pa->local_sapic_eid);
 488         /* nid should be overridden as logical node id later */
 489         node_cpuid[srat_num_cpus].nid = pxm;
 490         cpu_set(srat_num_cpus, early_cpu_possible_map);
 491         srat_num_cpus++;
 492 }
 493
 494 void __init
 495 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 496 {
 497         unsigned long paddr, size;
 498         int pxm;
 499         struct node_memblk_s *p, *q, *pend;
 500
 501         pxm = get_memory_proximity_domain(ma);
 502
 503         /* fill node memory chunk structure */
 504         paddr = ma->base_address;
 505         size = ma->length;
 506
 507         /* Ignore disabled entries */
 508         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
 509                 return;
 510
 511         /* record this node in proximity bitmap */
 512         pxm_bit_set(pxm);
 513
 514         /* Insertion sort based on base address */
 515         pend = &node_memblk[num_node_memblks];
 516         for (p = &node_memblk[0]; p < pend; p++) {
 517                 if (paddr < p->start_paddr)
 518                         break;
 519         }
 520         if (p < pend) {
 521                 for (q = pend - 1; q >= p; q--)
 522                         *(q + 1) = *q;
 523         }
 524         p->start_paddr = paddr;
 525         p->size = size;
 526         p->nid = pxm;
 527         num_node_memblks++;
 528 }
 529
 530 void __init acpi_numa_arch_fixup(void)
 531 {
 532         int i, j, node_from, node_to;
 533
 534         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 535         if (srat_num_cpus == 0) {
 536                 node_set_online(0);
 537                 node_cpuid[0].phys_id = hard_smp_processor_id();
 538                 return;
 539         }
 540
 541         /*
 542          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 543          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 544          */
 545         nodes_clear(node_online_map);
 546         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 547                 if (pxm_bit_test(i)) {
 548                         int nid = acpi_map_pxm_to_node(i);
 549                         node_set_online(nid);
 550                 }
 551         }
 552
 553         /* set logical node id in memory chunk structure */
 554         for (i = 0; i < num_node_memblks; i++)
 555                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
 556
 557         /* assign memory bank numbers for each chunk on each node */
 558         for_each_online_node(i) {
 559                 int bank;
 560
 561                 bank = 0;
 562                 for (j = 0; j < num_node_memblks; j++)
 563                         if (node_memblk[j].nid == i)
 564                                 node_memblk[j].bank = bank++;
 565         }
 566
 567         /* set logical node id in cpu structure */
 568         for_each_possible_early_cpu(i)
 569                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
 570
 571         printk(KERN_INFO "Number of logical nodes in system = %d\n",
 572                num_online_nodes());
 573         printk(KERN_INFO "Number of memory chunks in system = %d\n",
 574                num_node_memblks);
 575
 576         if (!slit_table) {
 577                 for (i = 0; i < MAX_NUMNODES; i++)
 578                         for (j = 0; j < MAX_NUMNODES; j++)
 579                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
 580                                                         REMOTE_DISTANCE;
 581                 return;
 582         }
 583
 584         memset(numa_slit, -1, sizeof(numa_slit));
 585         for (i = 0; i < slit_table->locality_count; i++) {
 586                 if (!pxm_bit_test(i))
 587                         continue;
 588                 node_from = pxm_to_node(i);
 589                 for (j = 0; j < slit_table->locality_count; j++) {
 590                         if (!pxm_bit_test(j))
 591                                 continue;
 592                         node_to = pxm_to_node(j);
 593                         node_distance(node_from, node_to) =
 594                             slit_table->entry[i * slit_table->locality_count + j];
 595                 }
 596         }
 597
 598 #ifdef SLIT_DEBUG
 599         printk("ACPI 2.0 SLIT locality table:\n");
 600         for_each_online_node(i) {
 601                 for_each_online_node(j)
 602                     printk("%03d ", node_distance(i, j));
 603                 printk("\n");
 604         }
 605 #endif
 606 }
 607 #endif                          /* CONFIG_ACPI_NUMA */
 608
 609 /*
 610  * success: return IRQ number (>=0)
 611  * failure: return < 0
 612  */
 613 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 614 {
 615         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 616                 return gsi;
 617
 618         if (has_8259 && gsi < 16)
 619                 return isa_irq_to_vector(gsi);
 620
 621         return iosapic_register_intr(gsi,
 622                                      (polarity ==
 623                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
 624                                      IOSAPIC_POL_LOW,
 625                                      (triggering ==
 626                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
 627                                      IOSAPIC_LEVEL);
 628 }
 629
 630 void acpi_unregister_gsi(u32 gsi)
 631 {
 632         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 633                 return;
 634
 635         if (has_8259 && gsi < 16)
 636                 return;
 637
 638         iosapic_unregister_intr(gsi);
 639 }
 640
 641 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 642 {
 643         struct acpi_table_header *fadt_header;
 644         struct acpi_table_fadt *fadt;
 645
 646         if (!table)
 647                 return -EINVAL;
 648
 649         fadt_header = (struct acpi_table_header *)table;
 650         if (fadt_header->revision != 3)
 651                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
 652
 653         fadt = (struct acpi_table_fadt *)fadt_header;
 654
 655         acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 656         return 0;
 657 }
 658
 659 int __init acpi_boot_init(void)
 660 {
 661
 662         /*
 663          * MADT
 664          * ----
 665          * Parse the Multiple APIC Description Table (MADT), if exists.
 666          * Note that this table provides platform SMP configuration
 667          * information -- the successor to MPS tables.
 668          */
 669
 670         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 671                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 672                 goto skip_madt;
 673         }
 674
 675         /* Local APIC */
 676
 677         if (acpi_table_parse_madt
 678             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
 679                 printk(KERN_ERR PREFIX
 680                        "Error parsing LAPIC address override entry\n");
 681
 682         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_lsapic, NR_CPUS)
 683             < 1)
 684                 printk(KERN_ERR PREFIX
 685                        "Error parsing MADT - no LAPIC entries\n");
 686
 687         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
 688             < 0)
 689                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 690
 691         /* I/O APIC */
 692
 693         if (acpi_table_parse_madt
 694             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
 695                 if (!ia64_platform_is("sn2"))
 696                         printk(KERN_ERR PREFIX
 697                                "Error parsing MADT - no IOSAPIC entries\n");
 698         }
 699
 700         /* System-Level Interrupt Routing */
 701
 702         if (acpi_table_parse_madt
 703             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
 704              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 705                 printk(KERN_ERR PREFIX
 706                        "Error parsing platform interrupt source entry\n");
 707
 708         if (acpi_table_parse_madt
 709             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
 710                 printk(KERN_ERR PREFIX
 711                        "Error parsing interrupt source overrides entry\n");
 712
 713         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
 714                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 715       skip_madt:
 716
 717         /*
 718          * FADT says whether a legacy keyboard controller is present.
 719          * The FADT also contains an SCI_INT line, by which the system
 720          * gets interrupts such as power and sleep buttons.  If it's not
 721          * on a Legacy interrupt, it needs to be setup.
 722          */
 723         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
 724                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 725
 726 #ifdef CONFIG_SMP
 727         if (available_cpus == 0) {
 728                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 729                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 730                 smp_boot_data.cpu_phys_id[available_cpus] =
 731                     hard_smp_processor_id();
 732                 available_cpus = 1;     /* We've got at least one of these, no? */
 733         }
 734         smp_boot_data.cpu_count = available_cpus;
 735
 736         smp_build_cpu_map();
 737 # ifdef CONFIG_ACPI_NUMA
 738         if (srat_num_cpus == 0) {
 739                 int cpu, i = 1;
 740                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 741                         if (smp_boot_data.cpu_phys_id[cpu] !=
 742                             hard_smp_processor_id())
 743                                 node_cpuid[i++].phys_id =
 744                                     smp_boot_data.cpu_phys_id[cpu];
 745         }
 746 # endif
 747 #endif
 748 #ifdef CONFIG_ACPI_NUMA
 749         build_cpu_to_node_map();
 750 #endif
 751         /* Make boot-up look pretty */
 752         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 753                total_cpus);
 754         return 0;
 755 }
 756
 757 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 758 {
 759         int tmp;
 760
 761         if (has_8259 && gsi < 16)
 762                 *irq = isa_irq_to_vector(gsi);
 763         else {
 764                 tmp = gsi_to_irq(gsi);
 765                 if (tmp == -1)
 766                         return -1;
 767                 *irq = tmp;
 768         }
 769         return 0;
 770 }
 771
 772 /*
 773  *  ACPI based hotplug CPU support
 774  */
 775 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 776 static
 777 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
 778 {
 779 #ifdef CONFIG_ACPI_NUMA
 780         int pxm_id;
 781         int nid;
 782
 783         pxm_id = acpi_get_pxm(handle);
 784         /*
 785          * We don't have cpu-only-node hotadd. But if the system equips
 786          * SRAT table, pxm is already found and node is ready.
 787          * So, just pxm_to_nid(pxm) is OK.
 788          * This code here is for the system which doesn't have full SRAT
 789          * table for possible cpus.
 790          */
 791         nid = acpi_map_pxm_to_node(pxm_id);
 792         node_cpuid[cpu].phys_id = physid;
 793         node_cpuid[cpu].nid = nid;
 794 #endif
 795         return (0);
 796 }
 797
 798 int additional_cpus __initdata = -1;
 799
 800 static __init int setup_additional_cpus(char *s)
 801 {
 802         if (s)
 803                 additional_cpus = simple_strtol(s, NULL, 0);
 804
 805         return 0;
 806 }
 807
 808 early_param("additional_cpus", setup_additional_cpus);
 809
 810 /*
 811  * cpu_possible_map should be static, it cannot change as CPUs
 812  * are onlined, or offlined. The reason is per-cpu data-structures
 813  * are allocated by some modules at init time, and dont expect to
 814  * do this dynamically on cpu arrival/departure.
 815  * cpu_present_map on the other hand can change dynamically.
 816  * In case when cpu_hotplug is not compiled, then we resort to current
 817  * behaviour, which is cpu_possible == cpu_present.
 818  * - Ashok Raj
 819  *
 820  * Three ways to find out the number of additional hotplug CPUs:
 821  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
 822  * - The user can overwrite it with additional_cpus=NUM
 823  * - Otherwise don't reserve additional CPUs.
 824  */
 825 __init void prefill_possible_map(void)
 826 {
 827         int i;
 828         int possible, disabled_cpus;
 829
 830         disabled_cpus = total_cpus - available_cpus;
 831
 832         if (additional_cpus == -1) {
 833                 if (disabled_cpus > 0)
 834                         additional_cpus = disabled_cpus;
 835                 else
 836                         additional_cpus = 0;
 837         }
 838
 839         possible = available_cpus + additional_cpus;
 840
 841         if (possible > NR_CPUS)
 842                 possible = NR_CPUS;
 843
 844         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
 845                 possible, max((possible - available_cpus), 0));
 846
 847         for (i = 0; i < possible; i++)
 848                 cpu_set(i, cpu_possible_map);
 849 }
 850
 851 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 852 {
 853         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 854         union acpi_object *obj;
 855         struct acpi_madt_local_sapic *lsapic;
 856         cpumask_t tmp_map;
 857         long physid;
 858         int cpu;
 859
 860         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 861                 return -EINVAL;
 862
 863         if (!buffer.length || !buffer.pointer)
 864                 return -EINVAL;
 865
 866         obj = buffer.pointer;
 867         if (obj->type != ACPI_TYPE_BUFFER)
 868         {
 869                 kfree(buffer.pointer);
 870                 return -EINVAL;
 871         }
 872
 873         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
 874
 875         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
 876             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
 877                 kfree(buffer.pointer);
 878                 return -EINVAL;
 879         }
 880
 881         physid = ((lsapic->id << 8) | (lsapic->eid));
 882
 883         kfree(buffer.pointer);
 884         buffer.length = ACPI_ALLOCATE_BUFFER;
 885         buffer.pointer = NULL;
 886
 887         cpus_complement(tmp_map, cpu_present_map);
 888         cpu = first_cpu(tmp_map);
 889         if (cpu >= NR_CPUS)
 890                 return -EINVAL;
 891
 892         acpi_map_cpu2node(handle, cpu, physid);
 893
 894         cpu_set(cpu, cpu_present_map);
 895         ia64_cpu_to_sapicid[cpu] = physid;
 896
 897         *pcpu = cpu;
 898         return (0);
 899 }
 900
 901 EXPORT_SYMBOL(acpi_map_lsapic);
 902
 903 int acpi_unmap_lsapic(int cpu)
 904 {
 905         ia64_cpu_to_sapicid[cpu] = -1;
 906         cpu_clear(cpu, cpu_present_map);
 907
 908 #ifdef CONFIG_ACPI_NUMA
 909         /* NUMA specific cleanup's */
 910 #endif
 911
 912         return (0);
 913 }
 914
 915 EXPORT_SYMBOL(acpi_unmap_lsapic);
 916 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 917
 918 #ifdef CONFIG_ACPI_NUMA
 919 static acpi_status __devinit
 920 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 921 {
 922         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 923         union acpi_object *obj;
 924         struct acpi_madt_io_sapic *iosapic;
 925         unsigned int gsi_base;
 926         int pxm, node;
 927
 928         /* Only care about objects w/ a method that returns the MADT */
 929         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 930                 return AE_OK;
 931
 932         if (!buffer.length || !buffer.pointer)
 933                 return AE_OK;
 934
 935         obj = buffer.pointer;
 936         if (obj->type != ACPI_TYPE_BUFFER ||
 937             obj->buffer.length < sizeof(*iosapic)) {
 938                 kfree(buffer.pointer);
 939                 return AE_OK;
 940         }
 941
 942         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
 943
 944         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
 945                 kfree(buffer.pointer);
 946                 return AE_OK;
 947         }
 948
 949         gsi_base = iosapic->global_irq_base;
 950
 951         kfree(buffer.pointer);
 952
 953         /*
 954          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 955          * us which node to associate this with.
 956          */
 957         pxm = acpi_get_pxm(handle);
 958         if (pxm < 0)
 959                 return AE_OK;
 960
 961         node = pxm_to_node(pxm);
 962
 963         if (node >= MAX_NUMNODES || !node_online(node) ||
 964             cpus_empty(node_to_cpumask(node)))
 965                 return AE_OK;
 966
 967         /* We know a gsi to node mapping! */
 968         map_iosapic_to_node(gsi_base, node);
 969         return AE_OK;
 970 }
 971
 972 static int __init
 973 acpi_map_iosapics (void)
 974 {
 975         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
 976         return 0;
 977 }
 978
 979 fs_initcall(acpi_map_iosapics);
 980 #endif                          /* CONFIG_ACPI_NUMA */
 981
 982 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 983 {
 984         int err;
 985
 986         if ((err = iosapic_init(phys_addr, gsi_base)))
 987                 return err;
 988
 989 #ifdef CONFIG_ACPI_NUMA
 990         acpi_map_iosapic(handle, 0, NULL, NULL);
 991 #endif                          /* CONFIG_ACPI_NUMA */
 992
 993         return 0;
 994 }
 995
 996 EXPORT_SYMBOL(acpi_register_ioapic);
 997
 998 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 999 {
1000         return iosapic_remove(gsi_base);
1001 }
1002
1003 EXPORT_SYMBOL(acpi_unregister_ioapic);
1004
1005 /*
1006  * acpi_save_state_mem() - save kernel state
1007  *
1008  * TBD when when IA64 starts to support suspend...
1009  */
1010 int acpi_save_state_mem(void) { return 0; }
1011
1012 /*
1013  * acpi_restore_state()
1014  */
1015 void acpi_restore_state_mem(void) {}
1016
1017 /*
1018  * do_suspend_lowlevel()
1019  */
1020 void do_suspend_lowlevel(void) {}
1021
1022 #endif                          /* CONFIG_ACPI */