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 void (*pm_idle) (void);
  64 EXPORT_SYMBOL(pm_idle);
  65 void (*pm_power_off) (void);
  66 EXPORT_SYMBOL(pm_power_off);
  67
  68 unsigned int acpi_cpei_override;
  69 unsigned int acpi_cpei_phys_cpuid;
  70
  71 unsigned long acpi_wakeup_address = 0;
  72
  73 #ifdef CONFIG_IA64_GENERIC
  74 static unsigned long __init acpi_find_rsdp(void)
  75 {
  76         unsigned long rsdp_phys = 0;
  77
  78         if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
  79                 rsdp_phys = efi.acpi20;
  80         else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
  81                 printk(KERN_WARNING PREFIX
  82                        "v1.0/r0.71 tables no longer supported\n");
  83         return rsdp_phys;
  84 }
  85 #endif
  86
  87 const char __init *
  88 acpi_get_sysname(void)
  89 {
  90 #ifdef CONFIG_IA64_GENERIC
  91         unsigned long rsdp_phys;
  92         struct acpi_table_rsdp *rsdp;
  93         struct acpi_table_xsdt *xsdt;
  94         struct acpi_table_header *hdr;
  95 #ifdef CONFIG_DMAR
  96         u64 i, nentries;
  97 #endif
  98
  99         rsdp_phys = acpi_find_rsdp();
 100         if (!rsdp_phys) {
 101                 printk(KERN_ERR
 102                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
 103                 return "dig";
 104         }
 105
 106         rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
 107         if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
 108                 printk(KERN_ERR
 109                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
 110                 return "dig";
 111         }
 112
 113         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
 114         hdr = &xsdt->header;
 115         if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
 116                 printk(KERN_ERR
 117                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 118                 return "dig";
 119         }
 120
 121         if (!strcmp(hdr->oem_id, "HP")) {
 122                 return "hpzx1";
 123         } else if (!strcmp(hdr->oem_id, "SGI")) {
 124                 if (!strcmp(hdr->oem_table_id + 4, "UV"))
 125                         return "uv";
 126                 else
 127                         return "sn2";
 128         } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
 129                 return "xen";
 130         }
 131
 132 #ifdef CONFIG_DMAR
 133         /* Look for Intel IOMMU */
 134         nentries = (hdr->length - sizeof(*hdr)) /
 135                          sizeof(xsdt->table_offset_entry[0]);
 136         for (i = 0; i < nentries; i++) {
 137                 hdr = __va(xsdt->table_offset_entry[i]);
 138                 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
 139                         sizeof(ACPI_SIG_DMAR) - 1) == 0)
 140                         return "dig_vtd";
 141         }
 142 #endif
 143
 144         return "dig";
 145 #else
 146 # if defined (CONFIG_IA64_HP_SIM)
 147         return "hpsim";
 148 # elif defined (CONFIG_IA64_HP_ZX1)
 149         return "hpzx1";
 150 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
 151         return "hpzx1_swiotlb";
 152 # elif defined (CONFIG_IA64_SGI_SN2)
 153         return "sn2";
 154 # elif defined (CONFIG_IA64_SGI_UV)
 155         return "uv";
 156 # elif defined (CONFIG_IA64_DIG)
 157         return "dig";
 158 # elif defined (CONFIG_IA64_XEN_GUEST)
 159         return "xen";
 160 # elif defined(CONFIG_IA64_DIG_VTD)
 161         return "dig_vtd";
 162 # else
 163 #       error Unknown platform.  Fix acpi.c.
 164 # endif
 165 #endif
 166 }
 167
 168 #ifdef CONFIG_ACPI
 169
 170 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 171
 172 /* Array to record platform interrupt vectors for generic interrupt routing. */
 173 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 174         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 175 };
 176
 177 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 178
 179 /*
 180  * Interrupt routing API for device drivers.  Provides interrupt vector for
 181  * a generic platform event.  Currently only CPEI is implemented.
 182  */
 183 int acpi_request_vector(u32 int_type)
 184 {
 185         int vector = -1;
 186
 187         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 188                 /* corrected platform error interrupt */
 189                 vector = platform_intr_list[int_type];
 190         } else
 191                 printk(KERN_ERR
 192                        "acpi_request_vector(): invalid interrupt type\n");
 193         return vector;
 194 }
 195
 196 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
 197 {
 198         return __va(phys_addr);
 199 }
 200
 201 /* --------------------------------------------------------------------------
 202                             Boot-time Table Parsing
 203    -------------------------------------------------------------------------- */
 204
 205 static int available_cpus __initdata;
 206 struct acpi_table_madt *acpi_madt __initdata;
 207 static u8 has_8259;
 208
 209 static int __init
 210 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 211                           const unsigned long end)
 212 {
 213         struct acpi_madt_local_apic_override *lapic;
 214
 215         lapic = (struct acpi_madt_local_apic_override *)header;
 216
 217         if (BAD_MADT_ENTRY(lapic, end))
 218                 return -EINVAL;
 219
 220         if (lapic->address) {
 221                 iounmap(ipi_base_addr);
 222                 ipi_base_addr = ioremap(lapic->address, 0);
 223         }
 224         return 0;
 225 }
 226
 227 static int __init
 228 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
 229 {
 230         struct acpi_madt_local_sapic *lsapic;
 231
 232         lsapic = (struct acpi_madt_local_sapic *)header;
 233
 234         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
 235
 236         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
 237 #ifdef CONFIG_SMP
 238                 smp_boot_data.cpu_phys_id[available_cpus] =
 239                     (lsapic->id << 8) | lsapic->eid;
 240 #endif
 241                 ++available_cpus;
 242         }
 243
 244         total_cpus++;
 245         return 0;
 246 }
 247
 248 static int __init
 249 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 250 {
 251         struct acpi_madt_local_apic_nmi *lacpi_nmi;
 252
 253         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
 254
 255         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 256                 return -EINVAL;
 257
 258         /* TBD: Support lapic_nmi entries */
 259         return 0;
 260 }
 261
 262 static int __init
 263 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
 264 {
 265         struct acpi_madt_io_sapic *iosapic;
 266
 267         iosapic = (struct acpi_madt_io_sapic *)header;
 268
 269         if (BAD_MADT_ENTRY(iosapic, end))
 270                 return -EINVAL;
 271
 272         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 273 }
 274
 275 static unsigned int __initdata acpi_madt_rev;
 276
 277 static int __init
 278 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
 279                         const unsigned long end)
 280 {
 281         struct acpi_madt_interrupt_source *plintsrc;
 282         int vector;
 283
 284         plintsrc = (struct acpi_madt_interrupt_source *)header;
 285
 286         if (BAD_MADT_ENTRY(plintsrc, end))
 287                 return -EINVAL;
 288
 289         /*
 290          * Get vector assignment for this interrupt, set attributes,
 291          * and program the IOSAPIC routing table.
 292          */
 293         vector = iosapic_register_platform_intr(plintsrc->type,
 294                                                 plintsrc->global_irq,
 295                                                 plintsrc->io_sapic_vector,
 296                                                 plintsrc->eid,
 297                                                 plintsrc->id,
 298                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 299                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 300                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 301                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 302                                                  ACPI_MADT_TRIGGER_EDGE) ?
 303                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
 304
 305         platform_intr_list[plintsrc->type] = vector;
 306         if (acpi_madt_rev > 1) {
 307                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
 308         }
 309
 310         /*
 311          * Save the physical id, so we can check when its being removed
 312          */
 313         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 314
 315         return 0;
 316 }
 317
 318 #ifdef CONFIG_HOTPLUG_CPU
 319 unsigned int can_cpei_retarget(void)
 320 {
 321         extern int cpe_vector;
 322         extern unsigned int force_cpei_retarget;
 323
 324         /*
 325          * Only if CPEI is supported and the override flag
 326          * is present, otherwise return that its re-targettable
 327          * if we are in polling mode.
 328          */
 329         if (cpe_vector > 0) {
 330                 if (acpi_cpei_override || force_cpei_retarget)
 331                         return 1;
 332                 else
 333                         return 0;
 334         }
 335         return 1;
 336 }
 337
 338 unsigned int is_cpu_cpei_target(unsigned int cpu)
 339 {
 340         unsigned int logical_id;
 341
 342         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
 343
 344         if (logical_id == cpu)
 345                 return 1;
 346         else
 347                 return 0;
 348 }
 349
 350 void set_cpei_target_cpu(unsigned int cpu)
 351 {
 352         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
 353 }
 354 #endif
 355
 356 unsigned int get_cpei_target_cpu(void)
 357 {
 358         return acpi_cpei_phys_cpuid;
 359 }
 360
 361 static int __init
 362 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 363                        const unsigned long end)
 364 {
 365         struct acpi_madt_interrupt_override *p;
 366
 367         p = (struct acpi_madt_interrupt_override *)header;
 368
 369         if (BAD_MADT_ENTRY(p, end))
 370                 return -EINVAL;
 371
 372         iosapic_override_isa_irq(p->source_irq, p->global_irq,
 373                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 374                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 375                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 376                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 377                                  ACPI_MADT_TRIGGER_EDGE) ?
 378                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
 379         return 0;
 380 }
 381
 382 static int __init
 383 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 384 {
 385         struct acpi_madt_nmi_source *nmi_src;
 386
 387         nmi_src = (struct acpi_madt_nmi_source *)header;
 388
 389         if (BAD_MADT_ENTRY(nmi_src, end))
 390                 return -EINVAL;
 391
 392         /* TBD: Support nimsrc entries */
 393         return 0;
 394 }
 395
 396 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 397 {
 398         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
 399
 400                 /*
 401                  * Unfortunately ITC_DRIFT is not yet part of the
 402                  * official SAL spec, so the ITC_DRIFT bit is not
 403                  * set by the BIOS on this hardware.
 404                  */
 405                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 406
 407                 cyclone_setup();
 408         }
 409 }
 410
 411 static int __init acpi_parse_madt(struct acpi_table_header *table)
 412 {
 413         if (!table)
 414                 return -EINVAL;
 415
 416         acpi_madt = (struct acpi_table_madt *)table;
 417
 418         acpi_madt_rev = acpi_madt->header.revision;
 419
 420         /* remember the value for reference after free_initmem() */
 421 #ifdef CONFIG_ITANIUM
 422         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
 423 #else
 424         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
 425 #endif
 426         iosapic_system_init(has_8259);
 427
 428         /* Get base address of IPI Message Block */
 429
 430         if (acpi_madt->address)
 431                 ipi_base_addr = ioremap(acpi_madt->address, 0);
 432
 433         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 434
 435         acpi_madt_oem_check(acpi_madt->header.oem_id,
 436                             acpi_madt->header.oem_table_id);
 437
 438         return 0;
 439 }
 440
 441 #ifdef CONFIG_ACPI_NUMA
 442
 443 #undef SLIT_DEBUG
 444
 445 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 446
 447 static int __initdata srat_num_cpus;    /* number of cpus */
 448 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 449 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 450 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 451 static struct acpi_table_slit __initdata *slit_table;
 452 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
 453
 454 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
 455 {
 456         int pxm;
 457
 458         pxm = pa->proximity_domain_lo;
 459         if (ia64_platform_is("sn2"))
 460                 pxm += pa->proximity_domain_hi[0] << 8;
 461         return pxm;
 462 }
 463
 464 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
 465 {
 466         int pxm;
 467
 468         pxm = ma->proximity_domain;
 469         if (!ia64_platform_is("sn2"))
 470                 pxm &= 0xff;
 471
 472         return pxm;
 473 }
 474
 475 /*
 476  * ACPI 2.0 SLIT (System Locality Information Table)
 477  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 478  */
 479 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 480 {
 481         u32 len;
 482
 483         len = sizeof(struct acpi_table_header) + 8
 484             + slit->locality_count * slit->locality_count;
 485         if (slit->header.length != len) {
 486                 printk(KERN_ERR
 487                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 488                        len, slit->header.length);
 489                 return;
 490         }
 491         slit_table = slit;
 492 }
 493
 494 void __init
 495 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
 496 {
 497         int pxm;
 498
 499         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
 500                 return;
 501
 502         pxm = get_processor_proximity_domain(pa);
 503
 504         /* record this node in proximity bitmap */
 505         pxm_bit_set(pxm);
 506
 507         node_cpuid[srat_num_cpus].phys_id =
 508             (pa->apic_id << 8) | (pa->local_sapic_eid);
 509         /* nid should be overridden as logical node id later */
 510         node_cpuid[srat_num_cpus].nid = pxm;
 511         cpu_set(srat_num_cpus, early_cpu_possible_map);
 512         srat_num_cpus++;
 513 }
 514
 515 void __init
 516 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 517 {
 518         unsigned long paddr, size;
 519         int pxm;
 520         struct node_memblk_s *p, *q, *pend;
 521
 522         pxm = get_memory_proximity_domain(ma);
 523
 524         /* fill node memory chunk structure */
 525         paddr = ma->base_address;
 526         size = ma->length;
 527
 528         /* Ignore disabled entries */
 529         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
 530                 return;
 531
 532         /* record this node in proximity bitmap */
 533         pxm_bit_set(pxm);
 534
 535         /* Insertion sort based on base address */
 536         pend = &node_memblk[num_node_memblks];
 537         for (p = &node_memblk[0]; p < pend; p++) {
 538                 if (paddr < p->start_paddr)
 539                         break;
 540         }
 541         if (p < pend) {
 542                 for (q = pend - 1; q >= p; q--)
 543                         *(q + 1) = *q;
 544         }
 545         p->start_paddr = paddr;
 546         p->size = size;
 547         p->nid = pxm;
 548         num_node_memblks++;
 549 }
 550
 551 void __init acpi_numa_arch_fixup(void)
 552 {
 553         int i, j, node_from, node_to;
 554
 555         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 556         if (srat_num_cpus == 0) {
 557                 node_set_online(0);
 558                 node_cpuid[0].phys_id = hard_smp_processor_id();
 559                 return;
 560         }
 561
 562         /*
 563          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 564          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 565          */
 566         nodes_clear(node_online_map);
 567         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 568                 if (pxm_bit_test(i)) {
 569                         int nid = acpi_map_pxm_to_node(i);
 570                         node_set_online(nid);
 571                 }
 572         }
 573
 574         /* set logical node id in memory chunk structure */
 575         for (i = 0; i < num_node_memblks; i++)
 576                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
 577
 578         /* assign memory bank numbers for each chunk on each node */
 579         for_each_online_node(i) {
 580                 int bank;
 581
 582                 bank = 0;
 583                 for (j = 0; j < num_node_memblks; j++)
 584                         if (node_memblk[j].nid == i)
 585                                 node_memblk[j].bank = bank++;
 586         }
 587
 588         /* set logical node id in cpu structure */
 589         for_each_possible_early_cpu(i)
 590                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
 591
 592         printk(KERN_INFO "Number of logical nodes in system = %d\n",
 593                num_online_nodes());
 594         printk(KERN_INFO "Number of memory chunks in system = %d\n",
 595                num_node_memblks);
 596
 597         if (!slit_table) {
 598                 for (i = 0; i < MAX_NUMNODES; i++)
 599                         for (j = 0; j < MAX_NUMNODES; j++)
 600                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
 601                                                         REMOTE_DISTANCE;
 602                 return;
 603         }
 604
 605         memset(numa_slit, -1, sizeof(numa_slit));
 606         for (i = 0; i < slit_table->locality_count; i++) {
 607                 if (!pxm_bit_test(i))
 608                         continue;
 609                 node_from = pxm_to_node(i);
 610                 for (j = 0; j < slit_table->locality_count; j++) {
 611                         if (!pxm_bit_test(j))
 612                                 continue;
 613                         node_to = pxm_to_node(j);
 614                         node_distance(node_from, node_to) =
 615                             slit_table->entry[i * slit_table->locality_count + j];
 616                 }
 617         }
 618
 619 #ifdef SLIT_DEBUG
 620         printk("ACPI 2.0 SLIT locality table:\n");
 621         for_each_online_node(i) {
 622                 for_each_online_node(j)
 623                     printk("%03d ", node_distance(i, j));
 624                 printk("\n");
 625         }
 626 #endif
 627 }
 628 #endif                          /* CONFIG_ACPI_NUMA */
 629
 630 /*
 631  * success: return IRQ number (>=0)
 632  * failure: return < 0
 633  */
 634 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 635 {
 636         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 637                 return gsi;
 638
 639         if (has_8259 && gsi < 16)
 640                 return isa_irq_to_vector(gsi);
 641
 642         return iosapic_register_intr(gsi,
 643                                      (polarity ==
 644                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
 645                                      IOSAPIC_POL_LOW,
 646                                      (triggering ==
 647                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
 648                                      IOSAPIC_LEVEL);
 649 }
 650
 651 void acpi_unregister_gsi(u32 gsi)
 652 {
 653         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 654                 return;
 655
 656         if (has_8259 && gsi < 16)
 657                 return;
 658
 659         iosapic_unregister_intr(gsi);
 660 }
 661
 662 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 663 {
 664         struct acpi_table_header *fadt_header;
 665         struct acpi_table_fadt *fadt;
 666
 667         if (!table)
 668                 return -EINVAL;
 669
 670         fadt_header = (struct acpi_table_header *)table;
 671         if (fadt_header->revision != 3)
 672                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
 673
 674         fadt = (struct acpi_table_fadt *)fadt_header;
 675
 676         acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 677         return 0;
 678 }
 679
 680 int __init early_acpi_boot_init(void)
 681 {
 682         int ret;
 683
 684         /*
 685          * do a partial walk of MADT to determine how many CPUs
 686          * we have including offline CPUs
 687          */
 688         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 689                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 690                 return 0;
 691         }
 692
 693         ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 694                 acpi_parse_lsapic, NR_CPUS);
 695         if (ret < 1)
 696                 printk(KERN_ERR PREFIX
 697                        "Error parsing MADT - no LAPIC entries\n");
 698
 699         return 0;
 700 }
 701
 702
 703
 704 int __init acpi_boot_init(void)
 705 {
 706
 707         /*
 708          * MADT
 709          * ----
 710          * Parse the Multiple APIC Description Table (MADT), if exists.
 711          * Note that this table provides platform SMP configuration
 712          * information -- the successor to MPS tables.
 713          */
 714
 715         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 716                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 717                 goto skip_madt;
 718         }
 719
 720         /* Local APIC */
 721
 722         if (acpi_table_parse_madt
 723             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
 724                 printk(KERN_ERR PREFIX
 725                        "Error parsing LAPIC address override entry\n");
 726
 727         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
 728             < 0)
 729                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 730
 731         /* I/O APIC */
 732
 733         if (acpi_table_parse_madt
 734             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
 735                 if (!ia64_platform_is("sn2"))
 736                         printk(KERN_ERR PREFIX
 737                                "Error parsing MADT - no IOSAPIC entries\n");
 738         }
 739
 740         /* System-Level Interrupt Routing */
 741
 742         if (acpi_table_parse_madt
 743             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
 744              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 745                 printk(KERN_ERR PREFIX
 746                        "Error parsing platform interrupt source entry\n");
 747
 748         if (acpi_table_parse_madt
 749             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
 750                 printk(KERN_ERR PREFIX
 751                        "Error parsing interrupt source overrides entry\n");
 752
 753         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
 754                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 755       skip_madt:
 756
 757         /*
 758          * FADT says whether a legacy keyboard controller is present.
 759          * The FADT also contains an SCI_INT line, by which the system
 760          * gets interrupts such as power and sleep buttons.  If it's not
 761          * on a Legacy interrupt, it needs to be setup.
 762          */
 763         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
 764                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 765
 766 #ifdef CONFIG_SMP
 767         if (available_cpus == 0) {
 768                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 769                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 770                 smp_boot_data.cpu_phys_id[available_cpus] =
 771                     hard_smp_processor_id();
 772                 available_cpus = 1;     /* We've got at least one of these, no? */
 773         }
 774         smp_boot_data.cpu_count = available_cpus;
 775
 776         smp_build_cpu_map();
 777 # ifdef CONFIG_ACPI_NUMA
 778         if (srat_num_cpus == 0) {
 779                 int cpu, i = 1;
 780                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 781                         if (smp_boot_data.cpu_phys_id[cpu] !=
 782                             hard_smp_processor_id())
 783                                 node_cpuid[i++].phys_id =
 784                                     smp_boot_data.cpu_phys_id[cpu];
 785         }
 786 # endif
 787 #endif
 788 #ifdef CONFIG_ACPI_NUMA
 789         build_cpu_to_node_map();
 790 #endif
 791         /* Make boot-up look pretty */
 792         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 793                total_cpus);
 794         return 0;
 795 }
 796
 797 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 798 {
 799         int tmp;
 800
 801         if (has_8259 && gsi < 16)
 802                 *irq = isa_irq_to_vector(gsi);
 803         else {
 804                 tmp = gsi_to_irq(gsi);
 805                 if (tmp == -1)
 806                         return -1;
 807                 *irq = tmp;
 808         }
 809         return 0;
 810 }
 811
 812 /*
 813  *  ACPI based hotplug CPU support
 814  */
 815 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 816 static
 817 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 818 {
 819 #ifdef CONFIG_ACPI_NUMA
 820         int pxm_id;
 821         int nid;
 822
 823         pxm_id = acpi_get_pxm(handle);
 824         /*
 825          * We don't have cpu-only-node hotadd. But if the system equips
 826          * SRAT table, pxm is already found and node is ready.
 827          * So, just pxm_to_nid(pxm) is OK.
 828          * This code here is for the system which doesn't have full SRAT
 829          * table for possible cpus.
 830          */
 831         nid = acpi_map_pxm_to_node(pxm_id);
 832         node_cpuid[cpu].phys_id = physid;
 833         node_cpuid[cpu].nid = nid;
 834 #endif
 835         return (0);
 836 }
 837
 838 int additional_cpus __initdata = -1;
 839
 840 static __init int setup_additional_cpus(char *s)
 841 {
 842         if (s)
 843                 additional_cpus = simple_strtol(s, NULL, 0);
 844
 845         return 0;
 846 }
 847
 848 early_param("additional_cpus", setup_additional_cpus);
 849
 850 /*
 851  * cpu_possible_map should be static, it cannot change as CPUs
 852  * are onlined, or offlined. The reason is per-cpu data-structures
 853  * are allocated by some modules at init time, and dont expect to
 854  * do this dynamically on cpu arrival/departure.
 855  * cpu_present_map on the other hand can change dynamically.
 856  * In case when cpu_hotplug is not compiled, then we resort to current
 857  * behaviour, which is cpu_possible == cpu_present.
 858  * - Ashok Raj
 859  *
 860  * Three ways to find out the number of additional hotplug CPUs:
 861  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
 862  * - The user can overwrite it with additional_cpus=NUM
 863  * - Otherwise don't reserve additional CPUs.
 864  */
 865 __init void prefill_possible_map(void)
 866 {
 867         int i;
 868         int possible, disabled_cpus;
 869
 870         disabled_cpus = total_cpus - available_cpus;
 871
 872         if (additional_cpus == -1) {
 873                 if (disabled_cpus > 0)
 874                         additional_cpus = disabled_cpus;
 875                 else
 876                         additional_cpus = 0;
 877         }
 878
 879         possible = available_cpus + additional_cpus;
 880
 881         if (possible > NR_CPUS)
 882                 possible = NR_CPUS;
 883
 884         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
 885                 possible, max((possible - available_cpus), 0));
 886
 887         for (i = 0; i < possible; i++)
 888                 cpu_set(i, cpu_possible_map);
 889 }
 890
 891 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 892 {
 893         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 894         union acpi_object *obj;
 895         struct acpi_madt_local_sapic *lsapic;
 896         cpumask_t tmp_map;
 897         int cpu, physid;
 898
 899         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 900                 return -EINVAL;
 901
 902         if (!buffer.length || !buffer.pointer)
 903                 return -EINVAL;
 904
 905         obj = buffer.pointer;
 906         if (obj->type != ACPI_TYPE_BUFFER)
 907         {
 908                 kfree(buffer.pointer);
 909                 return -EINVAL;
 910         }
 911
 912         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
 913
 914         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
 915             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
 916                 kfree(buffer.pointer);
 917                 return -EINVAL;
 918         }
 919
 920         physid = ((lsapic->id << 8) | (lsapic->eid));
 921
 922         kfree(buffer.pointer);
 923         buffer.length = ACPI_ALLOCATE_BUFFER;
 924         buffer.pointer = NULL;
 925
 926         cpus_complement(tmp_map, cpu_present_map);
 927         cpu = first_cpu(tmp_map);
 928         if (cpu >= NR_CPUS)
 929                 return -EINVAL;
 930
 931         acpi_map_cpu2node(handle, cpu, physid);
 932
 933         cpu_set(cpu, cpu_present_map);
 934         ia64_cpu_to_sapicid[cpu] = physid;
 935
 936         *pcpu = cpu;
 937         return (0);
 938 }
 939
 940 EXPORT_SYMBOL(acpi_map_lsapic);
 941
 942 int acpi_unmap_lsapic(int cpu)
 943 {
 944         ia64_cpu_to_sapicid[cpu] = -1;
 945         cpu_clear(cpu, cpu_present_map);
 946
 947 #ifdef CONFIG_ACPI_NUMA
 948         /* NUMA specific cleanup's */
 949 #endif
 950
 951         return (0);
 952 }
 953
 954 EXPORT_SYMBOL(acpi_unmap_lsapic);
 955 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 956
 957 #ifdef CONFIG_ACPI_NUMA
 958 static acpi_status __devinit
 959 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 960 {
 961         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 962         union acpi_object *obj;
 963         struct acpi_madt_io_sapic *iosapic;
 964         unsigned int gsi_base;
 965         int pxm, node;
 966
 967         /* Only care about objects w/ a method that returns the MADT */
 968         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 969                 return AE_OK;
 970
 971         if (!buffer.length || !buffer.pointer)
 972                 return AE_OK;
 973
 974         obj = buffer.pointer;
 975         if (obj->type != ACPI_TYPE_BUFFER ||
 976             obj->buffer.length < sizeof(*iosapic)) {
 977                 kfree(buffer.pointer);
 978                 return AE_OK;
 979         }
 980
 981         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
 982
 983         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
 984                 kfree(buffer.pointer);
 985                 return AE_OK;
 986         }
 987
 988         gsi_base = iosapic->global_irq_base;
 989
 990         kfree(buffer.pointer);
 991
 992         /*
 993          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 994          * us which node to associate this with.
 995          */
 996         pxm = acpi_get_pxm(handle);
 997         if (pxm < 0)
 998                 return AE_OK;
 999
1000         node = pxm_to_node(pxm);
1001
1002         if (node >= MAX_NUMNODES || !node_online(node) ||
1003             cpumask_empty(cpumask_of_node(node)))
1004                 return AE_OK;
1005
1006         /* We know a gsi to node mapping! */
1007         map_iosapic_to_node(gsi_base, node);
1008         return AE_OK;
1009 }
1010
1011 static int __init
1012 acpi_map_iosapics (void)
1013 {
1014         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1015         return 0;
1016 }
1017
1018 fs_initcall(acpi_map_iosapics);
1019 #endif                          /* CONFIG_ACPI_NUMA */
1020
1021 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1022 {
1023         int err;
1024
1025         if ((err = iosapic_init(phys_addr, gsi_base)))
1026                 return err;
1027
1028 #ifdef CONFIG_ACPI_NUMA
1029         acpi_map_iosapic(handle, 0, NULL, NULL);
1030 #endif                          /* CONFIG_ACPI_NUMA */
1031
1032         return 0;
1033 }
1034
1035 EXPORT_SYMBOL(acpi_register_ioapic);
1036
1037 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1038 {
1039         return iosapic_remove(gsi_base);
1040 }
1041
1042 EXPORT_SYMBOL(acpi_unregister_ioapic);
1043
1044 /*
1045  * acpi_save_state_mem() - save kernel state
1046  *
1047  * TBD when when IA64 starts to support suspend...
1048  */
1049 int acpi_save_state_mem(void) { return 0; }
1050
1051 /*
1052  * acpi_restore_state()
1053  */
1054 void acpi_restore_state_mem(void) {}
1055
1056 /*
1057  * do_suspend_lowlevel()
1058  */
1059 void do_suspend_lowlevel(void) {}
1060
1061 #endif                          /* CONFIG_ACPI */