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/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 #include <asm/xen/hypervisor.h>
  56
  57 #define BAD_MADT_ENTRY(entry, end) (                                        \
  58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  59                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  60
  61 #define PREFIX                  "ACPI: "
  62
  63 u32 acpi_rsdt_forced;
  64 unsigned int acpi_cpei_override;
  65 unsigned int acpi_cpei_phys_cpuid;
  66
  67 unsigned long acpi_wakeup_address = 0;
  68
  69 #ifdef CONFIG_IA64_GENERIC
  70 static unsigned long __init acpi_find_rsdp(void)
  71 {
  72         unsigned long rsdp_phys = 0;
  73
  74         if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
  75                 rsdp_phys = efi.acpi20;
  76         else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
  77                 printk(KERN_WARNING PREFIX
  78                        "v1.0/r0.71 tables no longer supported\n");
  79         return rsdp_phys;
  80 }
  81
  82 const char __init *
  83 acpi_get_sysname(void)
  84 {
  85         unsigned long rsdp_phys;
  86         struct acpi_table_rsdp *rsdp;
  87         struct acpi_table_xsdt *xsdt;
  88         struct acpi_table_header *hdr;
  89 #ifdef CONFIG_DMAR
  90         u64 i, nentries;
  91 #endif
  92
  93         rsdp_phys = acpi_find_rsdp();
  94         if (!rsdp_phys) {
  95                 printk(KERN_ERR
  96                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
  97                 return "dig";
  98         }
  99
 100         rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
 101         if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
 102                 printk(KERN_ERR
 103                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
 104                 return "dig";
 105         }
 106
 107         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
 108         hdr = &xsdt->header;
 109         if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
 110                 printk(KERN_ERR
 111                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 112                 return "dig";
 113         }
 114
 115         if (!strcmp(hdr->oem_id, "HP")) {
 116                 return "hpzx1";
 117         } else if (!strcmp(hdr->oem_id, "SGI")) {
 118                 if (!strcmp(hdr->oem_table_id + 4, "UV"))
 119                         return "uv";
 120                 else
 121                         return "sn2";
 122         } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
 123                 return "xen";
 124         }
 125
 126 #ifdef CONFIG_DMAR
 127         /* Look for Intel IOMMU */
 128         nentries = (hdr->length - sizeof(*hdr)) /
 129                          sizeof(xsdt->table_offset_entry[0]);
 130         for (i = 0; i < nentries; i++) {
 131                 hdr = __va(xsdt->table_offset_entry[i]);
 132                 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
 133                         sizeof(ACPI_SIG_DMAR) - 1) == 0)
 134                         return "dig_vtd";
 135         }
 136 #endif
 137
 138         return "dig";
 139 }
 140 #endif /* CONFIG_IA64_GENERIC */
 141
 142 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 143
 144 /* Array to record platform interrupt vectors for generic interrupt routing. */
 145 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 146         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 147 };
 148
 149 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 150
 151 /*
 152  * Interrupt routing API for device drivers.  Provides interrupt vector for
 153  * a generic platform event.  Currently only CPEI is implemented.
 154  */
 155 int acpi_request_vector(u32 int_type)
 156 {
 157         int vector = -1;
 158
 159         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 160                 /* corrected platform error interrupt */
 161                 vector = platform_intr_list[int_type];
 162         } else
 163                 printk(KERN_ERR
 164                        "acpi_request_vector(): invalid interrupt type\n");
 165         return vector;
 166 }
 167
 168 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
 169 {
 170         return __va(phys_addr);
 171 }
 172
 173 void __init __acpi_unmap_table(char *map, unsigned long size)
 174 {
 175 }
 176
 177 /* --------------------------------------------------------------------------
 178                             Boot-time Table Parsing
 179    -------------------------------------------------------------------------- */
 180
 181 static int available_cpus __initdata;
 182 struct acpi_table_madt *acpi_madt __initdata;
 183 static u8 has_8259;
 184
 185 static int __init
 186 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 187                           const unsigned long end)
 188 {
 189         struct acpi_madt_local_apic_override *lapic;
 190
 191         lapic = (struct acpi_madt_local_apic_override *)header;
 192
 193         if (BAD_MADT_ENTRY(lapic, end))
 194                 return -EINVAL;
 195
 196         if (lapic->address) {
 197                 iounmap(ipi_base_addr);
 198                 ipi_base_addr = ioremap(lapic->address, 0);
 199         }
 200         return 0;
 201 }
 202
 203 static int __init
 204 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
 205 {
 206         struct acpi_madt_local_sapic *lsapic;
 207
 208         lsapic = (struct acpi_madt_local_sapic *)header;
 209
 210         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
 211
 212         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
 213 #ifdef CONFIG_SMP
 214                 smp_boot_data.cpu_phys_id[available_cpus] =
 215                     (lsapic->id << 8) | lsapic->eid;
 216 #endif
 217                 ++available_cpus;
 218         }
 219
 220         total_cpus++;
 221         return 0;
 222 }
 223
 224 static int __init
 225 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 226 {
 227         struct acpi_madt_local_apic_nmi *lacpi_nmi;
 228
 229         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
 230
 231         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 232                 return -EINVAL;
 233
 234         /* TBD: Support lapic_nmi entries */
 235         return 0;
 236 }
 237
 238 static int __init
 239 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
 240 {
 241         struct acpi_madt_io_sapic *iosapic;
 242
 243         iosapic = (struct acpi_madt_io_sapic *)header;
 244
 245         if (BAD_MADT_ENTRY(iosapic, end))
 246                 return -EINVAL;
 247
 248         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 249 }
 250
 251 static unsigned int __initdata acpi_madt_rev;
 252
 253 static int __init
 254 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
 255                         const unsigned long end)
 256 {
 257         struct acpi_madt_interrupt_source *plintsrc;
 258         int vector;
 259
 260         plintsrc = (struct acpi_madt_interrupt_source *)header;
 261
 262         if (BAD_MADT_ENTRY(plintsrc, end))
 263                 return -EINVAL;
 264
 265         /*
 266          * Get vector assignment for this interrupt, set attributes,
 267          * and program the IOSAPIC routing table.
 268          */
 269         vector = iosapic_register_platform_intr(plintsrc->type,
 270                                                 plintsrc->global_irq,
 271                                                 plintsrc->io_sapic_vector,
 272                                                 plintsrc->eid,
 273                                                 plintsrc->id,
 274                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 275                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 276                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 277                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 278                                                  ACPI_MADT_TRIGGER_EDGE) ?
 279                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
 280
 281         platform_intr_list[plintsrc->type] = vector;
 282         if (acpi_madt_rev > 1) {
 283                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
 284         }
 285
 286         /*
 287          * Save the physical id, so we can check when its being removed
 288          */
 289         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 290
 291         return 0;
 292 }
 293
 294 #ifdef CONFIG_HOTPLUG_CPU
 295 unsigned int can_cpei_retarget(void)
 296 {
 297         extern int cpe_vector;
 298         extern unsigned int force_cpei_retarget;
 299
 300         /*
 301          * Only if CPEI is supported and the override flag
 302          * is present, otherwise return that its re-targettable
 303          * if we are in polling mode.
 304          */
 305         if (cpe_vector > 0) {
 306                 if (acpi_cpei_override || force_cpei_retarget)
 307                         return 1;
 308                 else
 309                         return 0;
 310         }
 311         return 1;
 312 }
 313
 314 unsigned int is_cpu_cpei_target(unsigned int cpu)
 315 {
 316         unsigned int logical_id;
 317
 318         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
 319
 320         if (logical_id == cpu)
 321                 return 1;
 322         else
 323                 return 0;
 324 }
 325
 326 void set_cpei_target_cpu(unsigned int cpu)
 327 {
 328         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
 329 }
 330 #endif
 331
 332 unsigned int get_cpei_target_cpu(void)
 333 {
 334         return acpi_cpei_phys_cpuid;
 335 }
 336
 337 static int __init
 338 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 339                        const unsigned long end)
 340 {
 341         struct acpi_madt_interrupt_override *p;
 342
 343         p = (struct acpi_madt_interrupt_override *)header;
 344
 345         if (BAD_MADT_ENTRY(p, end))
 346                 return -EINVAL;
 347
 348         iosapic_override_isa_irq(p->source_irq, p->global_irq,
 349                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 350                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 351                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 352                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 353                                  ACPI_MADT_TRIGGER_EDGE) ?
 354                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
 355         return 0;
 356 }
 357
 358 static int __init
 359 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 360 {
 361         struct acpi_madt_nmi_source *nmi_src;
 362
 363         nmi_src = (struct acpi_madt_nmi_source *)header;
 364
 365         if (BAD_MADT_ENTRY(nmi_src, end))
 366                 return -EINVAL;
 367
 368         /* TBD: Support nimsrc entries */
 369         return 0;
 370 }
 371
 372 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 373 {
 374         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
 375
 376                 /*
 377                  * Unfortunately ITC_DRIFT is not yet part of the
 378                  * official SAL spec, so the ITC_DRIFT bit is not
 379                  * set by the BIOS on this hardware.
 380                  */
 381                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 382
 383                 cyclone_setup();
 384         }
 385 }
 386
 387 static int __init acpi_parse_madt(struct acpi_table_header *table)
 388 {
 389         if (!table)
 390                 return -EINVAL;
 391
 392         acpi_madt = (struct acpi_table_madt *)table;
 393
 394         acpi_madt_rev = acpi_madt->header.revision;
 395
 396         /* remember the value for reference after free_initmem() */
 397 #ifdef CONFIG_ITANIUM
 398         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
 399 #else
 400         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
 401 #endif
 402         iosapic_system_init(has_8259);
 403
 404         /* Get base address of IPI Message Block */
 405
 406         if (acpi_madt->address)
 407                 ipi_base_addr = ioremap(acpi_madt->address, 0);
 408
 409         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 410
 411         acpi_madt_oem_check(acpi_madt->header.oem_id,
 412                             acpi_madt->header.oem_table_id);
 413
 414         return 0;
 415 }
 416
 417 #ifdef CONFIG_ACPI_NUMA
 418
 419 #undef SLIT_DEBUG
 420
 421 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 422
 423 static int __initdata srat_num_cpus;    /* number of cpus */
 424 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 425 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 426 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 427 static struct acpi_table_slit __initdata *slit_table;
 428 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
 429
 430 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
 431 {
 432         int pxm;
 433
 434         pxm = pa->proximity_domain_lo;
 435         if (ia64_platform_is("sn2"))
 436                 pxm += pa->proximity_domain_hi[0] << 8;
 437         return pxm;
 438 }
 439
 440 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
 441 {
 442         int pxm;
 443
 444         pxm = ma->proximity_domain;
 445         if (!ia64_platform_is("sn2"))
 446                 pxm &= 0xff;
 447
 448         return pxm;
 449 }
 450
 451 /*
 452  * ACPI 2.0 SLIT (System Locality Information Table)
 453  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 454  */
 455 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 456 {
 457         u32 len;
 458
 459         len = sizeof(struct acpi_table_header) + 8
 460             + slit->locality_count * slit->locality_count;
 461         if (slit->header.length != len) {
 462                 printk(KERN_ERR
 463                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 464                        len, slit->header.length);
 465                 return;
 466         }
 467         slit_table = slit;
 468 }
 469
 470 void __init
 471 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
 472 {
 473         int pxm;
 474
 475         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
 476                 return;
 477
 478         pxm = get_processor_proximity_domain(pa);
 479
 480         /* record this node in proximity bitmap */
 481         pxm_bit_set(pxm);
 482
 483         node_cpuid[srat_num_cpus].phys_id =
 484             (pa->apic_id << 8) | (pa->local_sapic_eid);
 485         /* nid should be overridden as logical node id later */
 486         node_cpuid[srat_num_cpus].nid = pxm;
 487         cpu_set(srat_num_cpus, early_cpu_possible_map);
 488         srat_num_cpus++;
 489 }
 490
 491 void __init
 492 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 493 {
 494         unsigned long paddr, size;
 495         int pxm;
 496         struct node_memblk_s *p, *q, *pend;
 497
 498         pxm = get_memory_proximity_domain(ma);
 499
 500         /* fill node memory chunk structure */
 501         paddr = ma->base_address;
 502         size = ma->length;
 503
 504         /* Ignore disabled entries */
 505         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
 506                 return;
 507
 508         /* record this node in proximity bitmap */
 509         pxm_bit_set(pxm);
 510
 511         /* Insertion sort based on base address */
 512         pend = &node_memblk[num_node_memblks];
 513         for (p = &node_memblk[0]; p < pend; p++) {
 514                 if (paddr < p->start_paddr)
 515                         break;
 516         }
 517         if (p < pend) {
 518                 for (q = pend - 1; q >= p; q--)
 519                         *(q + 1) = *q;
 520         }
 521         p->start_paddr = paddr;
 522         p->size = size;
 523         p->nid = pxm;
 524         num_node_memblks++;
 525 }
 526
 527 void __init acpi_numa_arch_fixup(void)
 528 {
 529         int i, j, node_from, node_to;
 530
 531         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 532         if (srat_num_cpus == 0) {
 533                 node_set_online(0);
 534                 node_cpuid[0].phys_id = hard_smp_processor_id();
 535                 return;
 536         }
 537
 538         /*
 539          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 540          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 541          */
 542         nodes_clear(node_online_map);
 543         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 544                 if (pxm_bit_test(i)) {
 545                         int nid = acpi_map_pxm_to_node(i);
 546                         node_set_online(nid);
 547                 }
 548         }
 549
 550         /* set logical node id in memory chunk structure */
 551         for (i = 0; i < num_node_memblks; i++)
 552                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
 553
 554         /* assign memory bank numbers for each chunk on each node */
 555         for_each_online_node(i) {
 556                 int bank;
 557
 558                 bank = 0;
 559                 for (j = 0; j < num_node_memblks; j++)
 560                         if (node_memblk[j].nid == i)
 561                                 node_memblk[j].bank = bank++;
 562         }
 563
 564         /* set logical node id in cpu structure */
 565         for_each_possible_early_cpu(i)
 566                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
 567
 568         printk(KERN_INFO "Number of logical nodes in system = %d\n",
 569                num_online_nodes());
 570         printk(KERN_INFO "Number of memory chunks in system = %d\n",
 571                num_node_memblks);
 572
 573         if (!slit_table) {
 574                 for (i = 0; i < MAX_NUMNODES; i++)
 575                         for (j = 0; j < MAX_NUMNODES; j++)
 576                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
 577                                                         REMOTE_DISTANCE;
 578                 return;
 579         }
 580
 581         memset(numa_slit, -1, sizeof(numa_slit));
 582         for (i = 0; i < slit_table->locality_count; i++) {
 583                 if (!pxm_bit_test(i))
 584                         continue;
 585                 node_from = pxm_to_node(i);
 586                 for (j = 0; j < slit_table->locality_count; j++) {
 587                         if (!pxm_bit_test(j))
 588                                 continue;
 589                         node_to = pxm_to_node(j);
 590                         node_distance(node_from, node_to) =
 591                             slit_table->entry[i * slit_table->locality_count + j];
 592                 }
 593         }
 594
 595 #ifdef SLIT_DEBUG
 596         printk("ACPI 2.0 SLIT locality table:\n");
 597         for_each_online_node(i) {
 598                 for_each_online_node(j)
 599                     printk("%03d ", node_distance(i, j));
 600                 printk("\n");
 601         }
 602 #endif
 603 }
 604 #endif                          /* CONFIG_ACPI_NUMA */
 605
 606 /*
 607  * success: return IRQ number (>=0)
 608  * failure: return < 0
 609  */
 610 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
 611 {
 612         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 613                 return gsi;
 614
 615         if (has_8259 && gsi < 16)
 616                 return isa_irq_to_vector(gsi);
 617
 618         return iosapic_register_intr(gsi,
 619                                      (polarity ==
 620                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
 621                                      IOSAPIC_POL_LOW,
 622                                      (triggering ==
 623                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
 624                                      IOSAPIC_LEVEL);
 625 }
 626
 627 void acpi_unregister_gsi(u32 gsi)
 628 {
 629         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 630                 return;
 631
 632         if (has_8259 && gsi < 16)
 633                 return;
 634
 635         iosapic_unregister_intr(gsi);
 636 }
 637
 638 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 639 {
 640         struct acpi_table_header *fadt_header;
 641         struct acpi_table_fadt *fadt;
 642
 643         if (!table)
 644                 return -EINVAL;
 645
 646         fadt_header = (struct acpi_table_header *)table;
 647         if (fadt_header->revision != 3)
 648                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
 649
 650         fadt = (struct acpi_table_fadt *)fadt_header;
 651
 652         acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
 653                                  ACPI_ACTIVE_LOW);
 654         return 0;
 655 }
 656
 657 int __init early_acpi_boot_init(void)
 658 {
 659         int ret;
 660
 661         /*
 662          * do a partial walk of MADT to determine how many CPUs
 663          * we have including offline CPUs
 664          */
 665         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 666                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 667                 return 0;
 668         }
 669
 670         ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 671                 acpi_parse_lsapic, NR_CPUS);
 672         if (ret < 1)
 673                 printk(KERN_ERR PREFIX
 674                        "Error parsing MADT - no LAPIC entries\n");
 675
 676 #ifdef CONFIG_SMP
 677         if (available_cpus == 0) {
 678                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 679                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 680                 smp_boot_data.cpu_phys_id[available_cpus] =
 681                     hard_smp_processor_id();
 682                 available_cpus = 1;     /* We've got at least one of these, no? */
 683         }
 684         smp_boot_data.cpu_count = available_cpus;
 685 #endif
 686         /* Make boot-up look pretty */
 687         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 688                total_cpus);
 689
 690         return 0;
 691 }
 692
 693 int __init acpi_boot_init(void)
 694 {
 695
 696         /*
 697          * MADT
 698          * ----
 699          * Parse the Multiple APIC Description Table (MADT), if exists.
 700          * Note that this table provides platform SMP configuration
 701          * information -- the successor to MPS tables.
 702          */
 703
 704         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 705                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 706                 goto skip_madt;
 707         }
 708
 709         /* Local APIC */
 710
 711         if (acpi_table_parse_madt
 712             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
 713                 printk(KERN_ERR PREFIX
 714                        "Error parsing LAPIC address override entry\n");
 715
 716         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
 717             < 0)
 718                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 719
 720         /* I/O APIC */
 721
 722         if (acpi_table_parse_madt
 723             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
 724                 if (!ia64_platform_is("sn2"))
 725                         printk(KERN_ERR PREFIX
 726                                "Error parsing MADT - no IOSAPIC entries\n");
 727         }
 728
 729         /* System-Level Interrupt Routing */
 730
 731         if (acpi_table_parse_madt
 732             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
 733              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 734                 printk(KERN_ERR PREFIX
 735                        "Error parsing platform interrupt source entry\n");
 736
 737         if (acpi_table_parse_madt
 738             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
 739                 printk(KERN_ERR PREFIX
 740                        "Error parsing interrupt source overrides entry\n");
 741
 742         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
 743                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 744       skip_madt:
 745
 746         /*
 747          * FADT says whether a legacy keyboard controller is present.
 748          * The FADT also contains an SCI_INT line, by which the system
 749          * gets interrupts such as power and sleep buttons.  If it's not
 750          * on a Legacy interrupt, it needs to be setup.
 751          */
 752         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
 753                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 754
 755 #ifdef CONFIG_ACPI_NUMA
 756 #ifdef CONFIG_SMP
 757         if (srat_num_cpus == 0) {
 758                 int cpu, i = 1;
 759                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 760                         if (smp_boot_data.cpu_phys_id[cpu] !=
 761                             hard_smp_processor_id())
 762                                 node_cpuid[i++].phys_id =
 763                                     smp_boot_data.cpu_phys_id[cpu];
 764         }
 765 #endif
 766         build_cpu_to_node_map();
 767 #endif
 768         return 0;
 769 }
 770
 771 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 772 {
 773         int tmp;
 774
 775         if (has_8259 && gsi < 16)
 776                 *irq = isa_irq_to_vector(gsi);
 777         else {
 778                 tmp = gsi_to_irq(gsi);
 779                 if (tmp == -1)
 780                         return -1;
 781                 *irq = tmp;
 782         }
 783         return 0;
 784 }
 785
 786 /*
 787  *  ACPI based hotplug CPU support
 788  */
 789 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 790 static
 791 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 792 {
 793 #ifdef CONFIG_ACPI_NUMA
 794         int pxm_id;
 795         int nid;
 796
 797         pxm_id = acpi_get_pxm(handle);
 798         /*
 799          * We don't have cpu-only-node hotadd. But if the system equips
 800          * SRAT table, pxm is already found and node is ready.
 801          * So, just pxm_to_nid(pxm) is OK.
 802          * This code here is for the system which doesn't have full SRAT
 803          * table for possible cpus.
 804          */
 805         nid = acpi_map_pxm_to_node(pxm_id);
 806         node_cpuid[cpu].phys_id = physid;
 807         node_cpuid[cpu].nid = nid;
 808 #endif
 809         return (0);
 810 }
 811
 812 int additional_cpus __initdata = -1;
 813
 814 static __init int setup_additional_cpus(char *s)
 815 {
 816         if (s)
 817                 additional_cpus = simple_strtol(s, NULL, 0);
 818
 819         return 0;
 820 }
 821
 822 early_param("additional_cpus", setup_additional_cpus);
 823
 824 /*
 825  * cpu_possible_map should be static, it cannot change as CPUs
 826  * are onlined, or offlined. The reason is per-cpu data-structures
 827  * are allocated by some modules at init time, and dont expect to
 828  * do this dynamically on cpu arrival/departure.
 829  * cpu_present_map on the other hand can change dynamically.
 830  * In case when cpu_hotplug is not compiled, then we resort to current
 831  * behaviour, which is cpu_possible == cpu_present.
 832  * - Ashok Raj
 833  *
 834  * Three ways to find out the number of additional hotplug CPUs:
 835  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
 836  * - The user can overwrite it with additional_cpus=NUM
 837  * - Otherwise don't reserve additional CPUs.
 838  */
 839 __init void prefill_possible_map(void)
 840 {
 841         int i;
 842         int possible, disabled_cpus;
 843
 844         disabled_cpus = total_cpus - available_cpus;
 845
 846         if (additional_cpus == -1) {
 847                 if (disabled_cpus > 0)
 848                         additional_cpus = disabled_cpus;
 849                 else
 850                         additional_cpus = 0;
 851         }
 852
 853         possible = available_cpus + additional_cpus;
 854
 855         if (possible > NR_CPUS)
 856                 possible = NR_CPUS;
 857
 858         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
 859                 possible, max((possible - available_cpus), 0));
 860
 861         for (i = 0; i < possible; i++)
 862                 set_cpu_possible(i, true);
 863 }
 864
 865 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 866 {
 867         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 868         union acpi_object *obj;
 869         struct acpi_madt_local_sapic *lsapic;
 870         cpumask_t tmp_map;
 871         int cpu, physid;
 872
 873         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 874                 return -EINVAL;
 875
 876         if (!buffer.length || !buffer.pointer)
 877                 return -EINVAL;
 878
 879         obj = buffer.pointer;
 880         if (obj->type != ACPI_TYPE_BUFFER)
 881         {
 882                 kfree(buffer.pointer);
 883                 return -EINVAL;
 884         }
 885
 886         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
 887
 888         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
 889             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
 890                 kfree(buffer.pointer);
 891                 return -EINVAL;
 892         }
 893
 894         physid = ((lsapic->id << 8) | (lsapic->eid));
 895
 896         kfree(buffer.pointer);
 897         buffer.length = ACPI_ALLOCATE_BUFFER;
 898         buffer.pointer = NULL;
 899
 900         cpumask_complement(&tmp_map, cpu_present_mask);
 901         cpu = cpumask_first(&tmp_map);
 902         if (cpu >= nr_cpu_ids)
 903                 return -EINVAL;
 904
 905         acpi_map_cpu2node(handle, cpu, physid);
 906
 907         cpu_set(cpu, cpu_present_map);
 908         ia64_cpu_to_sapicid[cpu] = physid;
 909
 910         *pcpu = cpu;
 911         return (0);
 912 }
 913
 914 EXPORT_SYMBOL(acpi_map_lsapic);
 915
 916 int acpi_unmap_lsapic(int cpu)
 917 {
 918         ia64_cpu_to_sapicid[cpu] = -1;
 919         cpu_clear(cpu, cpu_present_map);
 920
 921 #ifdef CONFIG_ACPI_NUMA
 922         /* NUMA specific cleanup's */
 923 #endif
 924
 925         return (0);
 926 }
 927
 928 EXPORT_SYMBOL(acpi_unmap_lsapic);
 929 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 930
 931 #ifdef CONFIG_ACPI_NUMA
 932 static acpi_status __devinit
 933 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 934 {
 935         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 936         union acpi_object *obj;
 937         struct acpi_madt_io_sapic *iosapic;
 938         unsigned int gsi_base;
 939         int pxm, node;
 940
 941         /* Only care about objects w/ a method that returns the MADT */
 942         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 943                 return AE_OK;
 944
 945         if (!buffer.length || !buffer.pointer)
 946                 return AE_OK;
 947
 948         obj = buffer.pointer;
 949         if (obj->type != ACPI_TYPE_BUFFER ||
 950             obj->buffer.length < sizeof(*iosapic)) {
 951                 kfree(buffer.pointer);
 952                 return AE_OK;
 953         }
 954
 955         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
 956
 957         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
 958                 kfree(buffer.pointer);
 959                 return AE_OK;
 960         }
 961
 962         gsi_base = iosapic->global_irq_base;
 963
 964         kfree(buffer.pointer);
 965
 966         /*
 967          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 968          * us which node to associate this with.
 969          */
 970         pxm = acpi_get_pxm(handle);
 971         if (pxm < 0)
 972                 return AE_OK;
 973
 974         node = pxm_to_node(pxm);
 975
 976         if (node >= MAX_NUMNODES || !node_online(node) ||
 977             cpumask_empty(cpumask_of_node(node)))
 978                 return AE_OK;
 979
 980         /* We know a gsi to node mapping! */
 981         map_iosapic_to_node(gsi_base, node);
 982         return AE_OK;
 983 }
 984
 985 static int __init
 986 acpi_map_iosapics (void)
 987 {
 988         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
 989         return 0;
 990 }
 991
 992 fs_initcall(acpi_map_iosapics);
 993 #endif                          /* CONFIG_ACPI_NUMA */
 994
 995 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 996 {
 997         int err;
 998
 999         if ((err = iosapic_init(phys_addr, gsi_base)))
1000                 return err;
1001
1002 #ifdef CONFIG_ACPI_NUMA
1003         acpi_map_iosapic(handle, 0, NULL, NULL);
1004 #endif                          /* CONFIG_ACPI_NUMA */
1005
1006         return 0;
1007 }
1008
1009 EXPORT_SYMBOL(acpi_register_ioapic);
1010
1011 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1012 {
1013         return iosapic_remove(gsi_base);
1014 }
1015
1016 EXPORT_SYMBOL(acpi_unregister_ioapic);
1017
1018 /*
1019  * acpi_save_state_mem() - save kernel state
1020  *
1021  * TBD when when IA64 starts to support suspend...
1022  */
1023 int acpi_save_state_mem(void) { return 0; }
1024
1025 /*
1026  * acpi_restore_state()
1027  */
1028 void acpi_restore_state_mem(void) {}
1029
1030 /*
1031  * do_suspend_lowlevel()
1032  */
1033 void do_suspend_lowlevel(void) {}