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   1 /*
   2  *  acpi.c - Architecture-Specific Low-Level ACPI Support
   3  *
   4  *  Copyright (C) 1999 VA Linux Systems
   5  *  Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
   6  *  Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
   7  *      David Mosberger-Tang <davidm@hpl.hp.com>
   8  *  Copyright (C) 2000 Intel Corp.
   9  *  Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
  10  *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
  11  *  Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
  12  *  Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
  13  *  Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
  14  *  Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
  15  *
  16  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License as published by
  20  *  the Free Software Foundation; either version 2 of the License, or
  21  *  (at your option) any later version.
  22  *
  23  *  This program is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with this program; if not, write to the Free Software
  30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  31  *
  32  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/kernel.h>
  38 #include <linux/sched.h>
  39 #include <linux/smp.h>
  40 #include <linux/string.h>
  41 #include <linux/types.h>
  42 #include <linux/irq.h>
  43 #include <linux/acpi.h>
  44 #include <linux/efi.h>
  45 #include <linux/mmzone.h>
  46 #include <linux/nodemask.h>
  47 #include <asm/io.h>
  48 #include <asm/iosapic.h>
  49 #include <asm/machvec.h>
  50 #include <asm/page.h>
  51 #include <asm/system.h>
  52 #include <asm/numa.h>
  53 #include <asm/sal.h>
  54 #include <asm/cyclone.h>
  55 #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 total_cpus __initdata;
 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 acpi_boot_init(void)
 682 {
 683
 684         /*
 685          * MADT
 686          * ----
 687          * Parse the Multiple APIC Description Table (MADT), if exists.
 688          * Note that this table provides platform SMP configuration
 689          * information -- the successor to MPS tables.
 690          */
 691
 692         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 693                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 694                 goto skip_madt;
 695         }
 696
 697         /* Local APIC */
 698
 699         if (acpi_table_parse_madt
 700             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
 701                 printk(KERN_ERR PREFIX
 702                        "Error parsing LAPIC address override entry\n");
 703
 704         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_lsapic, NR_CPUS)
 705             < 1)
 706                 printk(KERN_ERR PREFIX
 707                        "Error parsing MADT - no LAPIC entries\n");
 708
 709         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
 710             < 0)
 711                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 712
 713         /* I/O APIC */
 714
 715         if (acpi_table_parse_madt
 716             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
 717                 if (!ia64_platform_is("sn2"))
 718                         printk(KERN_ERR PREFIX
 719                                "Error parsing MADT - no IOSAPIC entries\n");
 720         }
 721
 722         /* System-Level Interrupt Routing */
 723
 724         if (acpi_table_parse_madt
 725             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
 726              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 727                 printk(KERN_ERR PREFIX
 728                        "Error parsing platform interrupt source entry\n");
 729
 730         if (acpi_table_parse_madt
 731             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
 732                 printk(KERN_ERR PREFIX
 733                        "Error parsing interrupt source overrides entry\n");
 734
 735         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
 736                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 737       skip_madt:
 738
 739         /*
 740          * FADT says whether a legacy keyboard controller is present.
 741          * The FADT also contains an SCI_INT line, by which the system
 742          * gets interrupts such as power and sleep buttons.  If it's not
 743          * on a Legacy interrupt, it needs to be setup.
 744          */
 745         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
 746                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 747
 748 #ifdef CONFIG_SMP
 749         if (available_cpus == 0) {
 750                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 751                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 752                 smp_boot_data.cpu_phys_id[available_cpus] =
 753                     hard_smp_processor_id();
 754                 available_cpus = 1;     /* We've got at least one of these, no? */
 755         }
 756         smp_boot_data.cpu_count = available_cpus;
 757
 758         smp_build_cpu_map();
 759 # ifdef CONFIG_ACPI_NUMA
 760         if (srat_num_cpus == 0) {
 761                 int cpu, i = 1;
 762                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 763                         if (smp_boot_data.cpu_phys_id[cpu] !=
 764                             hard_smp_processor_id())
 765                                 node_cpuid[i++].phys_id =
 766                                     smp_boot_data.cpu_phys_id[cpu];
 767         }
 768 # endif
 769 #endif
 770 #ifdef CONFIG_ACPI_NUMA
 771         build_cpu_to_node_map();
 772 #endif
 773         /* Make boot-up look pretty */
 774         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 775                total_cpus);
 776         return 0;
 777 }
 778
 779 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 780 {
 781         int tmp;
 782
 783         if (has_8259 && gsi < 16)
 784                 *irq = isa_irq_to_vector(gsi);
 785         else {
 786                 tmp = gsi_to_irq(gsi);
 787                 if (tmp == -1)
 788                         return -1;
 789                 *irq = tmp;
 790         }
 791         return 0;
 792 }
 793
 794 /*
 795  *  ACPI based hotplug CPU support
 796  */
 797 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 798 static
 799 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 800 {
 801 #ifdef CONFIG_ACPI_NUMA
 802         int pxm_id;
 803         int nid;
 804
 805         pxm_id = acpi_get_pxm(handle);
 806         /*
 807          * We don't have cpu-only-node hotadd. But if the system equips
 808          * SRAT table, pxm is already found and node is ready.
 809          * So, just pxm_to_nid(pxm) is OK.
 810          * This code here is for the system which doesn't have full SRAT
 811          * table for possible cpus.
 812          */
 813         nid = acpi_map_pxm_to_node(pxm_id);
 814         node_cpuid[cpu].phys_id = physid;
 815         node_cpuid[cpu].nid = nid;
 816 #endif
 817         return (0);
 818 }
 819
 820 int additional_cpus __initdata = -1;
 821
 822 static __init int setup_additional_cpus(char *s)
 823 {
 824         if (s)
 825                 additional_cpus = simple_strtol(s, NULL, 0);
 826
 827         return 0;
 828 }
 829
 830 early_param("additional_cpus", setup_additional_cpus);
 831
 832 /*
 833  * cpu_possible_map should be static, it cannot change as CPUs
 834  * are onlined, or offlined. The reason is per-cpu data-structures
 835  * are allocated by some modules at init time, and dont expect to
 836  * do this dynamically on cpu arrival/departure.
 837  * cpu_present_map on the other hand can change dynamically.
 838  * In case when cpu_hotplug is not compiled, then we resort to current
 839  * behaviour, which is cpu_possible == cpu_present.
 840  * - Ashok Raj
 841  *
 842  * Three ways to find out the number of additional hotplug CPUs:
 843  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
 844  * - The user can overwrite it with additional_cpus=NUM
 845  * - Otherwise don't reserve additional CPUs.
 846  */
 847 __init void prefill_possible_map(void)
 848 {
 849         int i;
 850         int possible, disabled_cpus;
 851
 852         disabled_cpus = total_cpus - available_cpus;
 853
 854         if (additional_cpus == -1) {
 855                 if (disabled_cpus > 0)
 856                         additional_cpus = disabled_cpus;
 857                 else
 858                         additional_cpus = 0;
 859         }
 860
 861         possible = available_cpus + additional_cpus;
 862
 863         if (possible > NR_CPUS)
 864                 possible = NR_CPUS;
 865
 866         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
 867                 possible, max((possible - available_cpus), 0));
 868
 869         for (i = 0; i < possible; i++)
 870                 cpu_set(i, cpu_possible_map);
 871 }
 872
 873 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 874 {
 875         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 876         union acpi_object *obj;
 877         struct acpi_madt_local_sapic *lsapic;
 878         cpumask_t tmp_map;
 879         int cpu, physid;
 880
 881         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 882                 return -EINVAL;
 883
 884         if (!buffer.length || !buffer.pointer)
 885                 return -EINVAL;
 886
 887         obj = buffer.pointer;
 888         if (obj->type != ACPI_TYPE_BUFFER)
 889         {
 890                 kfree(buffer.pointer);
 891                 return -EINVAL;
 892         }
 893
 894         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
 895
 896         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
 897             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
 898                 kfree(buffer.pointer);
 899                 return -EINVAL;
 900         }
 901
 902         physid = ((lsapic->id << 8) | (lsapic->eid));
 903
 904         kfree(buffer.pointer);
 905         buffer.length = ACPI_ALLOCATE_BUFFER;
 906         buffer.pointer = NULL;
 907
 908         cpus_complement(tmp_map, cpu_present_map);
 909         cpu = first_cpu(tmp_map);
 910         if (cpu >= NR_CPUS)
 911                 return -EINVAL;
 912
 913         acpi_map_cpu2node(handle, cpu, physid);
 914
 915         cpu_set(cpu, cpu_present_map);
 916         ia64_cpu_to_sapicid[cpu] = physid;
 917
 918         *pcpu = cpu;
 919         return (0);
 920 }
 921
 922 EXPORT_SYMBOL(acpi_map_lsapic);
 923
 924 int acpi_unmap_lsapic(int cpu)
 925 {
 926         ia64_cpu_to_sapicid[cpu] = -1;
 927         cpu_clear(cpu, cpu_present_map);
 928
 929 #ifdef CONFIG_ACPI_NUMA
 930         /* NUMA specific cleanup's */
 931 #endif
 932
 933         return (0);
 934 }
 935
 936 EXPORT_SYMBOL(acpi_unmap_lsapic);
 937 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 938
 939 #ifdef CONFIG_ACPI_NUMA
 940 static acpi_status __devinit
 941 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 942 {
 943         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 944         union acpi_object *obj;
 945         struct acpi_madt_io_sapic *iosapic;
 946         unsigned int gsi_base;
 947         int pxm, node;
 948
 949         /* Only care about objects w/ a method that returns the MADT */
 950         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 951                 return AE_OK;
 952
 953         if (!buffer.length || !buffer.pointer)
 954                 return AE_OK;
 955
 956         obj = buffer.pointer;
 957         if (obj->type != ACPI_TYPE_BUFFER ||
 958             obj->buffer.length < sizeof(*iosapic)) {
 959                 kfree(buffer.pointer);
 960                 return AE_OK;
 961         }
 962
 963         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
 964
 965         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
 966                 kfree(buffer.pointer);
 967                 return AE_OK;
 968         }
 969
 970         gsi_base = iosapic->global_irq_base;
 971
 972         kfree(buffer.pointer);
 973
 974         /*
 975          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 976          * us which node to associate this with.
 977          */
 978         pxm = acpi_get_pxm(handle);
 979         if (pxm < 0)
 980                 return AE_OK;
 981
 982         node = pxm_to_node(pxm);
 983
 984         if (node >= MAX_NUMNODES || !node_online(node) ||
 985             cpus_empty(node_to_cpumask(node)))
 986                 return AE_OK;
 987
 988         /* We know a gsi to node mapping! */
 989         map_iosapic_to_node(gsi_base, node);
 990         return AE_OK;
 991 }
 992
 993 static int __init
 994 acpi_map_iosapics (void)
 995 {
 996         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
 997         return 0;
 998 }
 999
1000 fs_initcall(acpi_map_iosapics);
1001 #endif                          /* CONFIG_ACPI_NUMA */
1002
1003 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1004 {
1005         int err;
1006
1007         if ((err = iosapic_init(phys_addr, gsi_base)))
1008                 return err;
1009
1010 #ifdef CONFIG_ACPI_NUMA
1011         acpi_map_iosapic(handle, 0, NULL, NULL);
1012 #endif                          /* CONFIG_ACPI_NUMA */
1013
1014         return 0;
1015 }
1016
1017 EXPORT_SYMBOL(acpi_register_ioapic);
1018
1019 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1020 {
1021         return iosapic_remove(gsi_base);
1022 }
1023
1024 EXPORT_SYMBOL(acpi_unregister_ioapic);
1025
1026 /*
1027  * acpi_save_state_mem() - save kernel state
1028  *
1029  * TBD when when IA64 starts to support suspend...
1030  */
1031 int acpi_save_state_mem(void) { return 0; }
1032
1033 /*
1034  * acpi_restore_state()
1035  */
1036 void acpi_restore_state_mem(void) {}
1037
1038 /*
1039  * do_suspend_lowlevel()
1040  */
1041 void do_suspend_lowlevel(void) {}
1042
1043 #endif                          /* CONFIG_ACPI */