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 u32 acpi_rsdt_forced;
  69 unsigned int acpi_cpei_override;
  70 unsigned int acpi_cpei_phys_cpuid;
  71
  72 unsigned long acpi_wakeup_address = 0;
  73
  74 #ifdef CONFIG_IA64_GENERIC
  75 static unsigned long __init acpi_find_rsdp(void)
  76 {
  77         unsigned long rsdp_phys = 0;
  78
  79         if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
  80                 rsdp_phys = efi.acpi20;
  81         else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
  82                 printk(KERN_WARNING PREFIX
  83                        "v1.0/r0.71 tables no longer supported\n");
  84         return rsdp_phys;
  85 }
  86 #endif
  87
  88 const char __init *
  89 acpi_get_sysname(void)
  90 {
  91 #ifdef CONFIG_IA64_GENERIC
  92         unsigned long rsdp_phys;
  93         struct acpi_table_rsdp *rsdp;
  94         struct acpi_table_xsdt *xsdt;
  95         struct acpi_table_header *hdr;
  96 #ifdef CONFIG_DMAR
  97         u64 i, nentries;
  98 #endif
  99
 100         rsdp_phys = acpi_find_rsdp();
 101         if (!rsdp_phys) {
 102                 printk(KERN_ERR
 103                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
 104                 return "dig";
 105         }
 106
 107         rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
 108         if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
 109                 printk(KERN_ERR
 110                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
 111                 return "dig";
 112         }
 113
 114         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
 115         hdr = &xsdt->header;
 116         if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
 117                 printk(KERN_ERR
 118                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 119                 return "dig";
 120         }
 121
 122         if (!strcmp(hdr->oem_id, "HP")) {
 123                 return "hpzx1";
 124         } else if (!strcmp(hdr->oem_id, "SGI")) {
 125                 if (!strcmp(hdr->oem_table_id + 4, "UV"))
 126                         return "uv";
 127                 else
 128                         return "sn2";
 129         } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
 130                 return "xen";
 131         }
 132
 133 #ifdef CONFIG_DMAR
 134         /* Look for Intel IOMMU */
 135         nentries = (hdr->length - sizeof(*hdr)) /
 136                          sizeof(xsdt->table_offset_entry[0]);
 137         for (i = 0; i < nentries; i++) {
 138                 hdr = __va(xsdt->table_offset_entry[i]);
 139                 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
 140                         sizeof(ACPI_SIG_DMAR) - 1) == 0)
 141                         return "dig_vtd";
 142         }
 143 #endif
 144
 145         return "dig";
 146 #else
 147 # if defined (CONFIG_IA64_HP_SIM)
 148         return "hpsim";
 149 # elif defined (CONFIG_IA64_HP_ZX1)
 150         return "hpzx1";
 151 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
 152         return "hpzx1_swiotlb";
 153 # elif defined (CONFIG_IA64_SGI_SN2)
 154         return "sn2";
 155 # elif defined (CONFIG_IA64_SGI_UV)
 156         return "uv";
 157 # elif defined (CONFIG_IA64_DIG)
 158         return "dig";
 159 # elif defined (CONFIG_IA64_XEN_GUEST)
 160         return "xen";
 161 # elif defined(CONFIG_IA64_DIG_VTD)
 162         return "dig_vtd";
 163 # else
 164 #       error Unknown platform.  Fix acpi.c.
 165 # endif
 166 #endif
 167 }
 168
 169 #ifdef CONFIG_ACPI
 170
 171 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 172
 173 /* Array to record platform interrupt vectors for generic interrupt routing. */
 174 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 175         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 176 };
 177
 178 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 179
 180 /*
 181  * Interrupt routing API for device drivers.  Provides interrupt vector for
 182  * a generic platform event.  Currently only CPEI is implemented.
 183  */
 184 int acpi_request_vector(u32 int_type)
 185 {
 186         int vector = -1;
 187
 188         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 189                 /* corrected platform error interrupt */
 190                 vector = platform_intr_list[int_type];
 191         } else
 192                 printk(KERN_ERR
 193                        "acpi_request_vector(): invalid interrupt type\n");
 194         return vector;
 195 }
 196
 197 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
 198 {
 199         return __va(phys_addr);
 200 }
 201
 202 /* --------------------------------------------------------------------------
 203                             Boot-time Table Parsing
 204    -------------------------------------------------------------------------- */
 205
 206 static int available_cpus __initdata;
 207 struct acpi_table_madt *acpi_madt __initdata;
 208 static u8 has_8259;
 209
 210 static int __init
 211 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 212                           const unsigned long end)
 213 {
 214         struct acpi_madt_local_apic_override *lapic;
 215
 216         lapic = (struct acpi_madt_local_apic_override *)header;
 217
 218         if (BAD_MADT_ENTRY(lapic, end))
 219                 return -EINVAL;
 220
 221         if (lapic->address) {
 222                 iounmap(ipi_base_addr);
 223                 ipi_base_addr = ioremap(lapic->address, 0);
 224         }
 225         return 0;
 226 }
 227
 228 static int __init
 229 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
 230 {
 231         struct acpi_madt_local_sapic *lsapic;
 232
 233         lsapic = (struct acpi_madt_local_sapic *)header;
 234
 235         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
 236
 237         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
 238 #ifdef CONFIG_SMP
 239                 smp_boot_data.cpu_phys_id[available_cpus] =
 240                     (lsapic->id << 8) | lsapic->eid;
 241 #endif
 242                 ++available_cpus;
 243         }
 244
 245         total_cpus++;
 246         return 0;
 247 }
 248
 249 static int __init
 250 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 251 {
 252         struct acpi_madt_local_apic_nmi *lacpi_nmi;
 253
 254         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
 255
 256         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 257                 return -EINVAL;
 258
 259         /* TBD: Support lapic_nmi entries */
 260         return 0;
 261 }
 262
 263 static int __init
 264 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
 265 {
 266         struct acpi_madt_io_sapic *iosapic;
 267
 268         iosapic = (struct acpi_madt_io_sapic *)header;
 269
 270         if (BAD_MADT_ENTRY(iosapic, end))
 271                 return -EINVAL;
 272
 273         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 274 }
 275
 276 static unsigned int __initdata acpi_madt_rev;
 277
 278 static int __init
 279 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
 280                         const unsigned long end)
 281 {
 282         struct acpi_madt_interrupt_source *plintsrc;
 283         int vector;
 284
 285         plintsrc = (struct acpi_madt_interrupt_source *)header;
 286
 287         if (BAD_MADT_ENTRY(plintsrc, end))
 288                 return -EINVAL;
 289
 290         /*
 291          * Get vector assignment for this interrupt, set attributes,
 292          * and program the IOSAPIC routing table.
 293          */
 294         vector = iosapic_register_platform_intr(plintsrc->type,
 295                                                 plintsrc->global_irq,
 296                                                 plintsrc->io_sapic_vector,
 297                                                 plintsrc->eid,
 298                                                 plintsrc->id,
 299                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 300                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 301                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 302                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 303                                                  ACPI_MADT_TRIGGER_EDGE) ?
 304                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
 305
 306         platform_intr_list[plintsrc->type] = vector;
 307         if (acpi_madt_rev > 1) {
 308                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
 309         }
 310
 311         /*
 312          * Save the physical id, so we can check when its being removed
 313          */
 314         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 315
 316         return 0;
 317 }
 318
 319 #ifdef CONFIG_HOTPLUG_CPU
 320 unsigned int can_cpei_retarget(void)
 321 {
 322         extern int cpe_vector;
 323         extern unsigned int force_cpei_retarget;
 324
 325         /*
 326          * Only if CPEI is supported and the override flag
 327          * is present, otherwise return that its re-targettable
 328          * if we are in polling mode.
 329          */
 330         if (cpe_vector > 0) {
 331                 if (acpi_cpei_override || force_cpei_retarget)
 332                         return 1;
 333                 else
 334                         return 0;
 335         }
 336         return 1;
 337 }
 338
 339 unsigned int is_cpu_cpei_target(unsigned int cpu)
 340 {
 341         unsigned int logical_id;
 342
 343         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
 344
 345         if (logical_id == cpu)
 346                 return 1;
 347         else
 348                 return 0;
 349 }
 350
 351 void set_cpei_target_cpu(unsigned int cpu)
 352 {
 353         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
 354 }
 355 #endif
 356
 357 unsigned int get_cpei_target_cpu(void)
 358 {
 359         return acpi_cpei_phys_cpuid;
 360 }
 361
 362 static int __init
 363 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 364                        const unsigned long end)
 365 {
 366         struct acpi_madt_interrupt_override *p;
 367
 368         p = (struct acpi_madt_interrupt_override *)header;
 369
 370         if (BAD_MADT_ENTRY(p, end))
 371                 return -EINVAL;
 372
 373         iosapic_override_isa_irq(p->source_irq, p->global_irq,
 374                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 375                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 376                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 377                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 378                                  ACPI_MADT_TRIGGER_EDGE) ?
 379                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
 380         return 0;
 381 }
 382
 383 static int __init
 384 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 385 {
 386         struct acpi_madt_nmi_source *nmi_src;
 387
 388         nmi_src = (struct acpi_madt_nmi_source *)header;
 389
 390         if (BAD_MADT_ENTRY(nmi_src, end))
 391                 return -EINVAL;
 392
 393         /* TBD: Support nimsrc entries */
 394         return 0;
 395 }
 396
 397 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 398 {
 399         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
 400
 401                 /*
 402                  * Unfortunately ITC_DRIFT is not yet part of the
 403                  * official SAL spec, so the ITC_DRIFT bit is not
 404                  * set by the BIOS on this hardware.
 405                  */
 406                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 407
 408                 cyclone_setup();
 409         }
 410 }
 411
 412 static int __init acpi_parse_madt(struct acpi_table_header *table)
 413 {
 414         if (!table)
 415                 return -EINVAL;
 416
 417         acpi_madt = (struct acpi_table_madt *)table;
 418
 419         acpi_madt_rev = acpi_madt->header.revision;
 420
 421         /* remember the value for reference after free_initmem() */
 422 #ifdef CONFIG_ITANIUM
 423         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
 424 #else
 425         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
 426 #endif
 427         iosapic_system_init(has_8259);
 428
 429         /* Get base address of IPI Message Block */
 430
 431         if (acpi_madt->address)
 432                 ipi_base_addr = ioremap(acpi_madt->address, 0);
 433
 434         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 435
 436         acpi_madt_oem_check(acpi_madt->header.oem_id,
 437                             acpi_madt->header.oem_table_id);
 438
 439         return 0;
 440 }
 441
 442 #ifdef CONFIG_ACPI_NUMA
 443
 444 #undef SLIT_DEBUG
 445
 446 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 447
 448 static int __initdata srat_num_cpus;    /* number of cpus */
 449 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 450 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 451 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 452 static struct acpi_table_slit __initdata *slit_table;
 453 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
 454
 455 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
 456 {
 457         int pxm;
 458
 459         pxm = pa->proximity_domain_lo;
 460         if (ia64_platform_is("sn2"))
 461                 pxm += pa->proximity_domain_hi[0] << 8;
 462         return pxm;
 463 }
 464
 465 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
 466 {
 467         int pxm;
 468
 469         pxm = ma->proximity_domain;
 470         if (!ia64_platform_is("sn2"))
 471                 pxm &= 0xff;
 472
 473         return pxm;
 474 }
 475
 476 /*
 477  * ACPI 2.0 SLIT (System Locality Information Table)
 478  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 479  */
 480 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 481 {
 482         u32 len;
 483
 484         len = sizeof(struct acpi_table_header) + 8
 485             + slit->locality_count * slit->locality_count;
 486         if (slit->header.length != len) {
 487                 printk(KERN_ERR
 488                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 489                        len, slit->header.length);
 490                 return;
 491         }
 492         slit_table = slit;
 493 }
 494
 495 void __init
 496 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
 497 {
 498         int pxm;
 499
 500         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
 501                 return;
 502
 503         pxm = get_processor_proximity_domain(pa);
 504
 505         /* record this node in proximity bitmap */
 506         pxm_bit_set(pxm);
 507
 508         node_cpuid[srat_num_cpus].phys_id =
 509             (pa->apic_id << 8) | (pa->local_sapic_eid);
 510         /* nid should be overridden as logical node id later */
 511         node_cpuid[srat_num_cpus].nid = pxm;
 512         cpu_set(srat_num_cpus, early_cpu_possible_map);
 513         srat_num_cpus++;
 514 }
 515
 516 void __init
 517 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 518 {
 519         unsigned long paddr, size;
 520         int pxm;
 521         struct node_memblk_s *p, *q, *pend;
 522
 523         pxm = get_memory_proximity_domain(ma);
 524
 525         /* fill node memory chunk structure */
 526         paddr = ma->base_address;
 527         size = ma->length;
 528
 529         /* Ignore disabled entries */
 530         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
 531                 return;
 532
 533         /* record this node in proximity bitmap */
 534         pxm_bit_set(pxm);
 535
 536         /* Insertion sort based on base address */
 537         pend = &node_memblk[num_node_memblks];
 538         for (p = &node_memblk[0]; p < pend; p++) {
 539                 if (paddr < p->start_paddr)
 540                         break;
 541         }
 542         if (p < pend) {
 543                 for (q = pend - 1; q >= p; q--)
 544                         *(q + 1) = *q;
 545         }
 546         p->start_paddr = paddr;
 547         p->size = size;
 548         p->nid = pxm;
 549         num_node_memblks++;
 550 }
 551
 552 void __init acpi_numa_arch_fixup(void)
 553 {
 554         int i, j, node_from, node_to;
 555
 556         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 557         if (srat_num_cpus == 0) {
 558                 node_set_online(0);
 559                 node_cpuid[0].phys_id = hard_smp_processor_id();
 560                 return;
 561         }
 562
 563         /*
 564          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 565          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 566          */
 567         nodes_clear(node_online_map);
 568         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 569                 if (pxm_bit_test(i)) {
 570                         int nid = acpi_map_pxm_to_node(i);
 571                         node_set_online(nid);
 572                 }
 573         }
 574
 575         /* set logical node id in memory chunk structure */
 576         for (i = 0; i < num_node_memblks; i++)
 577                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
 578
 579         /* assign memory bank numbers for each chunk on each node */
 580         for_each_online_node(i) {
 581                 int bank;
 582
 583                 bank = 0;
 584                 for (j = 0; j < num_node_memblks; j++)
 585                         if (node_memblk[j].nid == i)
 586                                 node_memblk[j].bank = bank++;
 587         }
 588
 589         /* set logical node id in cpu structure */
 590         for_each_possible_early_cpu(i)
 591                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
 592
 593         printk(KERN_INFO "Number of logical nodes in system = %d\n",
 594                num_online_nodes());
 595         printk(KERN_INFO "Number of memory chunks in system = %d\n",
 596                num_node_memblks);
 597
 598         if (!slit_table) {
 599                 for (i = 0; i < MAX_NUMNODES; i++)
 600                         for (j = 0; j < MAX_NUMNODES; j++)
 601                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
 602                                                         REMOTE_DISTANCE;
 603                 return;
 604         }
 605
 606         memset(numa_slit, -1, sizeof(numa_slit));
 607         for (i = 0; i < slit_table->locality_count; i++) {
 608                 if (!pxm_bit_test(i))
 609                         continue;
 610                 node_from = pxm_to_node(i);
 611                 for (j = 0; j < slit_table->locality_count; j++) {
 612                         if (!pxm_bit_test(j))
 613                                 continue;
 614                         node_to = pxm_to_node(j);
 615                         node_distance(node_from, node_to) =
 616                             slit_table->entry[i * slit_table->locality_count + j];
 617                 }
 618         }
 619
 620 #ifdef SLIT_DEBUG
 621         printk("ACPI 2.0 SLIT locality table:\n");
 622         for_each_online_node(i) {
 623                 for_each_online_node(j)
 624                     printk("%03d ", node_distance(i, j));
 625                 printk("\n");
 626         }
 627 #endif
 628 }
 629 #endif                          /* CONFIG_ACPI_NUMA */
 630
 631 /*
 632  * success: return IRQ number (>=0)
 633  * failure: return < 0
 634  */
 635 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 636 {
 637         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 638                 return gsi;
 639
 640         if (has_8259 && gsi < 16)
 641                 return isa_irq_to_vector(gsi);
 642
 643         return iosapic_register_intr(gsi,
 644                                      (polarity ==
 645                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
 646                                      IOSAPIC_POL_LOW,
 647                                      (triggering ==
 648                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
 649                                      IOSAPIC_LEVEL);
 650 }
 651
 652 void acpi_unregister_gsi(u32 gsi)
 653 {
 654         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 655                 return;
 656
 657         if (has_8259 && gsi < 16)
 658                 return;
 659
 660         iosapic_unregister_intr(gsi);
 661 }
 662
 663 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 664 {
 665         struct acpi_table_header *fadt_header;
 666         struct acpi_table_fadt *fadt;
 667
 668         if (!table)
 669                 return -EINVAL;
 670
 671         fadt_header = (struct acpi_table_header *)table;
 672         if (fadt_header->revision != 3)
 673                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
 674
 675         fadt = (struct acpi_table_fadt *)fadt_header;
 676
 677         acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 678         return 0;
 679 }
 680
 681 int __init early_acpi_boot_init(void)
 682 {
 683         int ret;
 684
 685         /*
 686          * do a partial walk of MADT to determine how many CPUs
 687          * we have including offline CPUs
 688          */
 689         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 690                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 691                 return 0;
 692         }
 693
 694         ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 695                 acpi_parse_lsapic, NR_CPUS);
 696         if (ret < 1)
 697                 printk(KERN_ERR PREFIX
 698                        "Error parsing MADT - no LAPIC entries\n");
 699
 700         return 0;
 701 }
 702
 703
 704
 705 int __init acpi_boot_init(void)
 706 {
 707
 708         /*
 709          * MADT
 710          * ----
 711          * Parse the Multiple APIC Description Table (MADT), if exists.
 712          * Note that this table provides platform SMP configuration
 713          * information -- the successor to MPS tables.
 714          */
 715
 716         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 717                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 718                 goto skip_madt;
 719         }
 720
 721         /* Local APIC */
 722
 723         if (acpi_table_parse_madt
 724             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
 725                 printk(KERN_ERR PREFIX
 726                        "Error parsing LAPIC address override entry\n");
 727
 728         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
 729             < 0)
 730                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 731
 732         /* I/O APIC */
 733
 734         if (acpi_table_parse_madt
 735             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
 736                 if (!ia64_platform_is("sn2"))
 737                         printk(KERN_ERR PREFIX
 738                                "Error parsing MADT - no IOSAPIC entries\n");
 739         }
 740
 741         /* System-Level Interrupt Routing */
 742
 743         if (acpi_table_parse_madt
 744             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
 745              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 746                 printk(KERN_ERR PREFIX
 747                        "Error parsing platform interrupt source entry\n");
 748
 749         if (acpi_table_parse_madt
 750             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
 751                 printk(KERN_ERR PREFIX
 752                        "Error parsing interrupt source overrides entry\n");
 753
 754         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
 755                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 756       skip_madt:
 757
 758         /*
 759          * FADT says whether a legacy keyboard controller is present.
 760          * The FADT also contains an SCI_INT line, by which the system
 761          * gets interrupts such as power and sleep buttons.  If it's not
 762          * on a Legacy interrupt, it needs to be setup.
 763          */
 764         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
 765                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 766
 767 #ifdef CONFIG_SMP
 768         if (available_cpus == 0) {
 769                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 770                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 771                 smp_boot_data.cpu_phys_id[available_cpus] =
 772                     hard_smp_processor_id();
 773                 available_cpus = 1;     /* We've got at least one of these, no? */
 774         }
 775         smp_boot_data.cpu_count = available_cpus;
 776
 777         smp_build_cpu_map();
 778 # ifdef CONFIG_ACPI_NUMA
 779         if (srat_num_cpus == 0) {
 780                 int cpu, i = 1;
 781                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 782                         if (smp_boot_data.cpu_phys_id[cpu] !=
 783                             hard_smp_processor_id())
 784                                 node_cpuid[i++].phys_id =
 785                                     smp_boot_data.cpu_phys_id[cpu];
 786         }
 787 # endif
 788 #endif
 789 #ifdef CONFIG_ACPI_NUMA
 790         build_cpu_to_node_map();
 791 #endif
 792         /* Make boot-up look pretty */
 793         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 794                total_cpus);
 795         return 0;
 796 }
 797
 798 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 799 {
 800         int tmp;
 801
 802         if (has_8259 && gsi < 16)
 803                 *irq = isa_irq_to_vector(gsi);
 804         else {
 805                 tmp = gsi_to_irq(gsi);
 806                 if (tmp == -1)
 807                         return -1;
 808                 *irq = tmp;
 809         }
 810         return 0;
 811 }
 812
 813 /*
 814  *  ACPI based hotplug CPU support
 815  */
 816 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 817 static
 818 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 819 {
 820 #ifdef CONFIG_ACPI_NUMA
 821         int pxm_id;
 822         int nid;
 823
 824         pxm_id = acpi_get_pxm(handle);
 825         /*
 826          * We don't have cpu-only-node hotadd. But if the system equips
 827          * SRAT table, pxm is already found and node is ready.
 828          * So, just pxm_to_nid(pxm) is OK.
 829          * This code here is for the system which doesn't have full SRAT
 830          * table for possible cpus.
 831          */
 832         nid = acpi_map_pxm_to_node(pxm_id);
 833         node_cpuid[cpu].phys_id = physid;
 834         node_cpuid[cpu].nid = nid;
 835 #endif
 836         return (0);
 837 }
 838
 839 int additional_cpus __initdata = -1;
 840
 841 static __init int setup_additional_cpus(char *s)
 842 {
 843         if (s)
 844                 additional_cpus = simple_strtol(s, NULL, 0);
 845
 846         return 0;
 847 }
 848
 849 early_param("additional_cpus", setup_additional_cpus);
 850
 851 /*
 852  * cpu_possible_map should be static, it cannot change as CPUs
 853  * are onlined, or offlined. The reason is per-cpu data-structures
 854  * are allocated by some modules at init time, and dont expect to
 855  * do this dynamically on cpu arrival/departure.
 856  * cpu_present_map on the other hand can change dynamically.
 857  * In case when cpu_hotplug is not compiled, then we resort to current
 858  * behaviour, which is cpu_possible == cpu_present.
 859  * - Ashok Raj
 860  *
 861  * Three ways to find out the number of additional hotplug CPUs:
 862  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
 863  * - The user can overwrite it with additional_cpus=NUM
 864  * - Otherwise don't reserve additional CPUs.
 865  */
 866 __init void prefill_possible_map(void)
 867 {
 868         int i;
 869         int possible, disabled_cpus;
 870
 871         disabled_cpus = total_cpus - available_cpus;
 872
 873         if (additional_cpus == -1) {
 874                 if (disabled_cpus > 0)
 875                         additional_cpus = disabled_cpus;
 876                 else
 877                         additional_cpus = 0;
 878         }
 879
 880         possible = available_cpus + additional_cpus;
 881
 882         if (possible > NR_CPUS)
 883                 possible = NR_CPUS;
 884
 885         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
 886                 possible, max((possible - available_cpus), 0));
 887
 888         for (i = 0; i < possible; i++)
 889                 cpu_set(i, cpu_possible_map);
 890 }
 891
 892 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 893 {
 894         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 895         union acpi_object *obj;
 896         struct acpi_madt_local_sapic *lsapic;
 897         cpumask_t tmp_map;
 898         int cpu, physid;
 899
 900         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 901                 return -EINVAL;
 902
 903         if (!buffer.length || !buffer.pointer)
 904                 return -EINVAL;
 905
 906         obj = buffer.pointer;
 907         if (obj->type != ACPI_TYPE_BUFFER)
 908         {
 909                 kfree(buffer.pointer);
 910                 return -EINVAL;
 911         }
 912
 913         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
 914
 915         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
 916             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
 917                 kfree(buffer.pointer);
 918                 return -EINVAL;
 919         }
 920
 921         physid = ((lsapic->id << 8) | (lsapic->eid));
 922
 923         kfree(buffer.pointer);
 924         buffer.length = ACPI_ALLOCATE_BUFFER;
 925         buffer.pointer = NULL;
 926
 927         cpus_complement(tmp_map, cpu_present_map);
 928         cpu = first_cpu(tmp_map);
 929         if (cpu >= NR_CPUS)
 930                 return -EINVAL;
 931
 932         acpi_map_cpu2node(handle, cpu, physid);
 933
 934         cpu_set(cpu, cpu_present_map);
 935         ia64_cpu_to_sapicid[cpu] = physid;
 936
 937         *pcpu = cpu;
 938         return (0);
 939 }
 940
 941 EXPORT_SYMBOL(acpi_map_lsapic);
 942
 943 int acpi_unmap_lsapic(int cpu)
 944 {
 945         ia64_cpu_to_sapicid[cpu] = -1;
 946         cpu_clear(cpu, cpu_present_map);
 947
 948 #ifdef CONFIG_ACPI_NUMA
 949         /* NUMA specific cleanup's */
 950 #endif
 951
 952         return (0);
 953 }
 954
 955 EXPORT_SYMBOL(acpi_unmap_lsapic);
 956 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 957
 958 #ifdef CONFIG_ACPI_NUMA
 959 static acpi_status __devinit
 960 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 961 {
 962         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 963         union acpi_object *obj;
 964         struct acpi_madt_io_sapic *iosapic;
 965         unsigned int gsi_base;
 966         int pxm, node;
 967
 968         /* Only care about objects w/ a method that returns the MADT */
 969         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 970                 return AE_OK;
 971
 972         if (!buffer.length || !buffer.pointer)
 973                 return AE_OK;
 974
 975         obj = buffer.pointer;
 976         if (obj->type != ACPI_TYPE_BUFFER ||
 977             obj->buffer.length < sizeof(*iosapic)) {
 978                 kfree(buffer.pointer);
 979                 return AE_OK;
 980         }
 981
 982         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
 983
 984         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
 985                 kfree(buffer.pointer);
 986                 return AE_OK;
 987         }
 988
 989         gsi_base = iosapic->global_irq_base;
 990
 991         kfree(buffer.pointer);
 992
 993         /*
 994          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 995          * us which node to associate this with.
 996          */
 997         pxm = acpi_get_pxm(handle);
 998         if (pxm < 0)
 999                 return AE_OK;
1000
1001         node = pxm_to_node(pxm);
1002
1003         if (node >= MAX_NUMNODES || !node_online(node) ||
1004             cpumask_empty(cpumask_of_node(node)))
1005                 return AE_OK;
1006
1007         /* We know a gsi to node mapping! */
1008         map_iosapic_to_node(gsi_base, node);
1009         return AE_OK;
1010 }
1011
1012 static int __init
1013 acpi_map_iosapics (void)
1014 {
1015         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1016         return 0;
1017 }
1018
1019 fs_initcall(acpi_map_iosapics);
1020 #endif                          /* CONFIG_ACPI_NUMA */
1021
1022 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1023 {
1024         int err;
1025
1026         if ((err = iosapic_init(phys_addr, gsi_base)))
1027                 return err;
1028
1029 #ifdef CONFIG_ACPI_NUMA
1030         acpi_map_iosapic(handle, 0, NULL, NULL);
1031 #endif                          /* CONFIG_ACPI_NUMA */
1032
1033         return 0;
1034 }
1035
1036 EXPORT_SYMBOL(acpi_register_ioapic);
1037
1038 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1039 {
1040         return iosapic_remove(gsi_base);
1041 }
1042
1043 EXPORT_SYMBOL(acpi_unregister_ioapic);
1044
1045 /*
1046  * acpi_save_state_mem() - save kernel state
1047  *
1048  * TBD when when IA64 starts to support suspend...
1049  */
1050 int acpi_save_state_mem(void) { return 0; }
1051
1052 /*
1053  * acpi_restore_state()
1054  */
1055 void acpi_restore_state_mem(void) {}
1056
1057 /*
1058  * do_suspend_lowlevel()
1059  */
1060 void do_suspend_lowlevel(void) {}
1061
1062 #endif                          /* CONFIG_ACPI */