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 total_cpus __initdata;
 207 static int available_cpus __initdata;
 208 struct acpi_table_madt *acpi_madt __initdata;
 209 static u8 has_8259;
 210
 211 static int __init
 212 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 213                           const unsigned long end)
 214 {
 215         struct acpi_madt_local_apic_override *lapic;
 216
 217         lapic = (struct acpi_madt_local_apic_override *)header;
 218
 219         if (BAD_MADT_ENTRY(lapic, end))
 220                 return -EINVAL;
 221
 222         if (lapic->address) {
 223                 iounmap(ipi_base_addr);
 224                 ipi_base_addr = ioremap(lapic->address, 0);
 225         }
 226         return 0;
 227 }
 228
 229 static int __init
 230 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
 231 {
 232         struct acpi_madt_local_sapic *lsapic;
 233
 234         lsapic = (struct acpi_madt_local_sapic *)header;
 235
 236         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
 237
 238         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
 239 #ifdef CONFIG_SMP
 240                 smp_boot_data.cpu_phys_id[available_cpus] =
 241                     (lsapic->id << 8) | lsapic->eid;
 242 #endif
 243                 ++available_cpus;
 244         }
 245
 246         total_cpus++;
 247         return 0;
 248 }
 249
 250 static int __init
 251 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 252 {
 253         struct acpi_madt_local_apic_nmi *lacpi_nmi;
 254
 255         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
 256
 257         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 258                 return -EINVAL;
 259
 260         /* TBD: Support lapic_nmi entries */
 261         return 0;
 262 }
 263
 264 static int __init
 265 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
 266 {
 267         struct acpi_madt_io_sapic *iosapic;
 268
 269         iosapic = (struct acpi_madt_io_sapic *)header;
 270
 271         if (BAD_MADT_ENTRY(iosapic, end))
 272                 return -EINVAL;
 273
 274         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 275 }
 276
 277 static unsigned int __initdata acpi_madt_rev;
 278
 279 static int __init
 280 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
 281                         const unsigned long end)
 282 {
 283         struct acpi_madt_interrupt_source *plintsrc;
 284         int vector;
 285
 286         plintsrc = (struct acpi_madt_interrupt_source *)header;
 287
 288         if (BAD_MADT_ENTRY(plintsrc, end))
 289                 return -EINVAL;
 290
 291         /*
 292          * Get vector assignment for this interrupt, set attributes,
 293          * and program the IOSAPIC routing table.
 294          */
 295         vector = iosapic_register_platform_intr(plintsrc->type,
 296                                                 plintsrc->global_irq,
 297                                                 plintsrc->io_sapic_vector,
 298                                                 plintsrc->eid,
 299                                                 plintsrc->id,
 300                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 301                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 302                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 303                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 304                                                  ACPI_MADT_TRIGGER_EDGE) ?
 305                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
 306
 307         platform_intr_list[plintsrc->type] = vector;
 308         if (acpi_madt_rev > 1) {
 309                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
 310         }
 311
 312         /*
 313          * Save the physical id, so we can check when its being removed
 314          */
 315         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 316
 317         return 0;
 318 }
 319
 320 #ifdef CONFIG_HOTPLUG_CPU
 321 unsigned int can_cpei_retarget(void)
 322 {
 323         extern int cpe_vector;
 324         extern unsigned int force_cpei_retarget;
 325
 326         /*
 327          * Only if CPEI is supported and the override flag
 328          * is present, otherwise return that its re-targettable
 329          * if we are in polling mode.
 330          */
 331         if (cpe_vector > 0) {
 332                 if (acpi_cpei_override || force_cpei_retarget)
 333                         return 1;
 334                 else
 335                         return 0;
 336         }
 337         return 1;
 338 }
 339
 340 unsigned int is_cpu_cpei_target(unsigned int cpu)
 341 {
 342         unsigned int logical_id;
 343
 344         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
 345
 346         if (logical_id == cpu)
 347                 return 1;
 348         else
 349                 return 0;
 350 }
 351
 352 void set_cpei_target_cpu(unsigned int cpu)
 353 {
 354         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
 355 }
 356 #endif
 357
 358 unsigned int get_cpei_target_cpu(void)
 359 {
 360         return acpi_cpei_phys_cpuid;
 361 }
 362
 363 static int __init
 364 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 365                        const unsigned long end)
 366 {
 367         struct acpi_madt_interrupt_override *p;
 368
 369         p = (struct acpi_madt_interrupt_override *)header;
 370
 371         if (BAD_MADT_ENTRY(p, end))
 372                 return -EINVAL;
 373
 374         iosapic_override_isa_irq(p->source_irq, p->global_irq,
 375                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 376                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 377                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 378                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 379                                  ACPI_MADT_TRIGGER_EDGE) ?
 380                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
 381         return 0;
 382 }
 383
 384 static int __init
 385 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 386 {
 387         struct acpi_madt_nmi_source *nmi_src;
 388
 389         nmi_src = (struct acpi_madt_nmi_source *)header;
 390
 391         if (BAD_MADT_ENTRY(nmi_src, end))
 392                 return -EINVAL;
 393
 394         /* TBD: Support nimsrc entries */
 395         return 0;
 396 }
 397
 398 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 399 {
 400         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
 401
 402                 /*
 403                  * Unfortunately ITC_DRIFT is not yet part of the
 404                  * official SAL spec, so the ITC_DRIFT bit is not
 405                  * set by the BIOS on this hardware.
 406                  */
 407                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 408
 409                 cyclone_setup();
 410         }
 411 }
 412
 413 static int __init acpi_parse_madt(struct acpi_table_header *table)
 414 {
 415         if (!table)
 416                 return -EINVAL;
 417
 418         acpi_madt = (struct acpi_table_madt *)table;
 419
 420         acpi_madt_rev = acpi_madt->header.revision;
 421
 422         /* remember the value for reference after free_initmem() */
 423 #ifdef CONFIG_ITANIUM
 424         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
 425 #else
 426         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
 427 #endif
 428         iosapic_system_init(has_8259);
 429
 430         /* Get base address of IPI Message Block */
 431
 432         if (acpi_madt->address)
 433                 ipi_base_addr = ioremap(acpi_madt->address, 0);
 434
 435         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 436
 437         acpi_madt_oem_check(acpi_madt->header.oem_id,
 438                             acpi_madt->header.oem_table_id);
 439
 440         return 0;
 441 }
 442
 443 #ifdef CONFIG_ACPI_NUMA
 444
 445 #undef SLIT_DEBUG
 446
 447 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 448
 449 static int __initdata srat_num_cpus;    /* number of cpus */
 450 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 451 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 452 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 453 static struct acpi_table_slit __initdata *slit_table;
 454 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
 455
 456 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
 457 {
 458         int pxm;
 459
 460         pxm = pa->proximity_domain_lo;
 461         if (ia64_platform_is("sn2"))
 462                 pxm += pa->proximity_domain_hi[0] << 8;
 463         return pxm;
 464 }
 465
 466 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
 467 {
 468         int pxm;
 469
 470         pxm = ma->proximity_domain;
 471         if (!ia64_platform_is("sn2"))
 472                 pxm &= 0xff;
 473
 474         return pxm;
 475 }
 476
 477 /*
 478  * ACPI 2.0 SLIT (System Locality Information Table)
 479  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 480  */
 481 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 482 {
 483         u32 len;
 484
 485         len = sizeof(struct acpi_table_header) + 8
 486             + slit->locality_count * slit->locality_count;
 487         if (slit->header.length != len) {
 488                 printk(KERN_ERR
 489                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 490                        len, slit->header.length);
 491                 return;
 492         }
 493         slit_table = slit;
 494 }
 495
 496 void __init
 497 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
 498 {
 499         int pxm;
 500
 501         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
 502                 return;
 503
 504         pxm = get_processor_proximity_domain(pa);
 505
 506         /* record this node in proximity bitmap */
 507         pxm_bit_set(pxm);
 508
 509         node_cpuid[srat_num_cpus].phys_id =
 510             (pa->apic_id << 8) | (pa->local_sapic_eid);
 511         /* nid should be overridden as logical node id later */
 512         node_cpuid[srat_num_cpus].nid = pxm;
 513         cpu_set(srat_num_cpus, early_cpu_possible_map);
 514         srat_num_cpus++;
 515 }
 516
 517 void __init
 518 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 519 {
 520         unsigned long paddr, size;
 521         int pxm;
 522         struct node_memblk_s *p, *q, *pend;
 523
 524         pxm = get_memory_proximity_domain(ma);
 525
 526         /* fill node memory chunk structure */
 527         paddr = ma->base_address;
 528         size = ma->length;
 529
 530         /* Ignore disabled entries */
 531         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
 532                 return;
 533
 534         /* record this node in proximity bitmap */
 535         pxm_bit_set(pxm);
 536
 537         /* Insertion sort based on base address */
 538         pend = &node_memblk[num_node_memblks];
 539         for (p = &node_memblk[0]; p < pend; p++) {
 540                 if (paddr < p->start_paddr)
 541                         break;
 542         }
 543         if (p < pend) {
 544                 for (q = pend - 1; q >= p; q--)
 545                         *(q + 1) = *q;
 546         }
 547         p->start_paddr = paddr;
 548         p->size = size;
 549         p->nid = pxm;
 550         num_node_memblks++;
 551 }
 552
 553 void __init acpi_numa_arch_fixup(void)
 554 {
 555         int i, j, node_from, node_to;
 556
 557         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 558         if (srat_num_cpus == 0) {
 559                 node_set_online(0);
 560                 node_cpuid[0].phys_id = hard_smp_processor_id();
 561                 return;
 562         }
 563
 564         /*
 565          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 566          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 567          */
 568         nodes_clear(node_online_map);
 569         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 570                 if (pxm_bit_test(i)) {
 571                         int nid = acpi_map_pxm_to_node(i);
 572                         node_set_online(nid);
 573                 }
 574         }
 575
 576         /* set logical node id in memory chunk structure */
 577         for (i = 0; i < num_node_memblks; i++)
 578                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
 579
 580         /* assign memory bank numbers for each chunk on each node */
 581         for_each_online_node(i) {
 582                 int bank;
 583
 584                 bank = 0;
 585                 for (j = 0; j < num_node_memblks; j++)
 586                         if (node_memblk[j].nid == i)
 587                                 node_memblk[j].bank = bank++;
 588         }
 589
 590         /* set logical node id in cpu structure */
 591         for_each_possible_early_cpu(i)
 592                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
 593
 594         printk(KERN_INFO "Number of logical nodes in system = %d\n",
 595                num_online_nodes());
 596         printk(KERN_INFO "Number of memory chunks in system = %d\n",
 597                num_node_memblks);
 598
 599         if (!slit_table) {
 600                 for (i = 0; i < MAX_NUMNODES; i++)
 601                         for (j = 0; j < MAX_NUMNODES; j++)
 602                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
 603                                                         REMOTE_DISTANCE;
 604                 return;
 605         }
 606
 607         memset(numa_slit, -1, sizeof(numa_slit));
 608         for (i = 0; i < slit_table->locality_count; i++) {
 609                 if (!pxm_bit_test(i))
 610                         continue;
 611                 node_from = pxm_to_node(i);
 612                 for (j = 0; j < slit_table->locality_count; j++) {
 613                         if (!pxm_bit_test(j))
 614                                 continue;
 615                         node_to = pxm_to_node(j);
 616                         node_distance(node_from, node_to) =
 617                             slit_table->entry[i * slit_table->locality_count + j];
 618                 }
 619         }
 620
 621 #ifdef SLIT_DEBUG
 622         printk("ACPI 2.0 SLIT locality table:\n");
 623         for_each_online_node(i) {
 624                 for_each_online_node(j)
 625                     printk("%03d ", node_distance(i, j));
 626                 printk("\n");
 627         }
 628 #endif
 629 }
 630 #endif                          /* CONFIG_ACPI_NUMA */
 631
 632 /*
 633  * success: return IRQ number (>=0)
 634  * failure: return < 0
 635  */
 636 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 637 {
 638         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 639                 return gsi;
 640
 641         if (has_8259 && gsi < 16)
 642                 return isa_irq_to_vector(gsi);
 643
 644         return iosapic_register_intr(gsi,
 645                                      (polarity ==
 646                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
 647                                      IOSAPIC_POL_LOW,
 648                                      (triggering ==
 649                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
 650                                      IOSAPIC_LEVEL);
 651 }
 652
 653 void acpi_unregister_gsi(u32 gsi)
 654 {
 655         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 656                 return;
 657
 658         if (has_8259 && gsi < 16)
 659                 return;
 660
 661         iosapic_unregister_intr(gsi);
 662 }
 663
 664 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 665 {
 666         struct acpi_table_header *fadt_header;
 667         struct acpi_table_fadt *fadt;
 668
 669         if (!table)
 670                 return -EINVAL;
 671
 672         fadt_header = (struct acpi_table_header *)table;
 673         if (fadt_header->revision != 3)
 674                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
 675
 676         fadt = (struct acpi_table_fadt *)fadt_header;
 677
 678         acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 679         return 0;
 680 }
 681
 682 int __init early_acpi_boot_init(void)
 683 {
 684         int ret;
 685
 686         /*
 687          * do a partial walk of MADT to determine how many CPUs
 688          * we have including offline CPUs
 689          */
 690         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 691                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 692                 return 0;
 693         }
 694
 695         ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 696                 acpi_parse_lsapic, NR_CPUS);
 697         if (ret < 1)
 698                 printk(KERN_ERR PREFIX
 699                        "Error parsing MADT - no LAPIC entries\n");
 700
 701         return 0;
 702 }
 703
 704
 705
 706 int __init acpi_boot_init(void)
 707 {
 708
 709         /*
 710          * MADT
 711          * ----
 712          * Parse the Multiple APIC Description Table (MADT), if exists.
 713          * Note that this table provides platform SMP configuration
 714          * information -- the successor to MPS tables.
 715          */
 716
 717         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 718                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 719                 goto skip_madt;
 720         }
 721
 722         /* Local APIC */
 723
 724         if (acpi_table_parse_madt
 725             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
 726                 printk(KERN_ERR PREFIX
 727                        "Error parsing LAPIC address override entry\n");
 728
 729         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
 730             < 0)
 731                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 732
 733         /* I/O APIC */
 734
 735         if (acpi_table_parse_madt
 736             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
 737                 if (!ia64_platform_is("sn2"))
 738                         printk(KERN_ERR PREFIX
 739                                "Error parsing MADT - no IOSAPIC entries\n");
 740         }
 741
 742         /* System-Level Interrupt Routing */
 743
 744         if (acpi_table_parse_madt
 745             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
 746              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 747                 printk(KERN_ERR PREFIX
 748                        "Error parsing platform interrupt source entry\n");
 749
 750         if (acpi_table_parse_madt
 751             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
 752                 printk(KERN_ERR PREFIX
 753                        "Error parsing interrupt source overrides entry\n");
 754
 755         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
 756                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 757       skip_madt:
 758
 759         /*
 760          * FADT says whether a legacy keyboard controller is present.
 761          * The FADT also contains an SCI_INT line, by which the system
 762          * gets interrupts such as power and sleep buttons.  If it's not
 763          * on a Legacy interrupt, it needs to be setup.
 764          */
 765         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
 766                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 767
 768 #ifdef CONFIG_SMP
 769         if (available_cpus == 0) {
 770                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 771                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 772                 smp_boot_data.cpu_phys_id[available_cpus] =
 773                     hard_smp_processor_id();
 774                 available_cpus = 1;     /* We've got at least one of these, no? */
 775         }
 776         smp_boot_data.cpu_count = available_cpus;
 777
 778         smp_build_cpu_map();
 779 # ifdef CONFIG_ACPI_NUMA
 780         if (srat_num_cpus == 0) {
 781                 int cpu, i = 1;
 782                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 783                         if (smp_boot_data.cpu_phys_id[cpu] !=
 784                             hard_smp_processor_id())
 785                                 node_cpuid[i++].phys_id =
 786                                     smp_boot_data.cpu_phys_id[cpu];
 787         }
 788 # endif
 789 #endif
 790 #ifdef CONFIG_ACPI_NUMA
 791         build_cpu_to_node_map();
 792 #endif
 793         /* Make boot-up look pretty */
 794         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 795                total_cpus);
 796         return 0;
 797 }
 798
 799 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 800 {
 801         int tmp;
 802
 803         if (has_8259 && gsi < 16)
 804                 *irq = isa_irq_to_vector(gsi);
 805         else {
 806                 tmp = gsi_to_irq(gsi);
 807                 if (tmp == -1)
 808                         return -1;
 809                 *irq = tmp;
 810         }
 811         return 0;
 812 }
 813
 814 /*
 815  *  ACPI based hotplug CPU support
 816  */
 817 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 818 static
 819 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 820 {
 821 #ifdef CONFIG_ACPI_NUMA
 822         int pxm_id;
 823         int nid;
 824
 825         pxm_id = acpi_get_pxm(handle);
 826         /*
 827          * We don't have cpu-only-node hotadd. But if the system equips
 828          * SRAT table, pxm is already found and node is ready.
 829          * So, just pxm_to_nid(pxm) is OK.
 830          * This code here is for the system which doesn't have full SRAT
 831          * table for possible cpus.
 832          */
 833         nid = acpi_map_pxm_to_node(pxm_id);
 834         node_cpuid[cpu].phys_id = physid;
 835         node_cpuid[cpu].nid = nid;
 836 #endif
 837         return (0);
 838 }
 839
 840 int additional_cpus __initdata = -1;
 841
 842 static __init int setup_additional_cpus(char *s)
 843 {
 844         if (s)
 845                 additional_cpus = simple_strtol(s, NULL, 0);
 846
 847         return 0;
 848 }
 849
 850 early_param("additional_cpus", setup_additional_cpus);
 851
 852 /*
 853  * cpu_possible_map should be static, it cannot change as CPUs
 854  * are onlined, or offlined. The reason is per-cpu data-structures
 855  * are allocated by some modules at init time, and dont expect to
 856  * do this dynamically on cpu arrival/departure.
 857  * cpu_present_map on the other hand can change dynamically.
 858  * In case when cpu_hotplug is not compiled, then we resort to current
 859  * behaviour, which is cpu_possible == cpu_present.
 860  * - Ashok Raj
 861  *
 862  * Three ways to find out the number of additional hotplug CPUs:
 863  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
 864  * - The user can overwrite it with additional_cpus=NUM
 865  * - Otherwise don't reserve additional CPUs.
 866  */
 867 __init void prefill_possible_map(void)
 868 {
 869         int i;
 870         int possible, disabled_cpus;
 871
 872         disabled_cpus = total_cpus - available_cpus;
 873
 874         if (additional_cpus == -1) {
 875                 if (disabled_cpus > 0)
 876                         additional_cpus = disabled_cpus;
 877                 else
 878                         additional_cpus = 0;
 879         }
 880
 881         possible = available_cpus + additional_cpus;
 882
 883         if (possible > NR_CPUS)
 884                 possible = NR_CPUS;
 885
 886         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
 887                 possible, max((possible - available_cpus), 0));
 888
 889         for (i = 0; i < possible; i++)
 890                 cpu_set(i, cpu_possible_map);
 891 }
 892
 893 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 894 {
 895         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 896         union acpi_object *obj;
 897         struct acpi_madt_local_sapic *lsapic;
 898         cpumask_t tmp_map;
 899         int cpu, physid;
 900
 901         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 902                 return -EINVAL;
 903
 904         if (!buffer.length || !buffer.pointer)
 905                 return -EINVAL;
 906
 907         obj = buffer.pointer;
 908         if (obj->type != ACPI_TYPE_BUFFER)
 909         {
 910                 kfree(buffer.pointer);
 911                 return -EINVAL;
 912         }
 913
 914         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
 915
 916         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
 917             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
 918                 kfree(buffer.pointer);
 919                 return -EINVAL;
 920         }
 921
 922         physid = ((lsapic->id << 8) | (lsapic->eid));
 923
 924         kfree(buffer.pointer);
 925         buffer.length = ACPI_ALLOCATE_BUFFER;
 926         buffer.pointer = NULL;
 927
 928         cpus_complement(tmp_map, cpu_present_map);
 929         cpu = first_cpu(tmp_map);
 930         if (cpu >= NR_CPUS)
 931                 return -EINVAL;
 932
 933         acpi_map_cpu2node(handle, cpu, physid);
 934
 935         cpu_set(cpu, cpu_present_map);
 936         ia64_cpu_to_sapicid[cpu] = physid;
 937
 938         *pcpu = cpu;
 939         return (0);
 940 }
 941
 942 EXPORT_SYMBOL(acpi_map_lsapic);
 943
 944 int acpi_unmap_lsapic(int cpu)
 945 {
 946         ia64_cpu_to_sapicid[cpu] = -1;
 947         cpu_clear(cpu, cpu_present_map);
 948
 949 #ifdef CONFIG_ACPI_NUMA
 950         /* NUMA specific cleanup's */
 951 #endif
 952
 953         return (0);
 954 }
 955
 956 EXPORT_SYMBOL(acpi_unmap_lsapic);
 957 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 958
 959 #ifdef CONFIG_ACPI_NUMA
 960 static acpi_status __devinit
 961 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 962 {
 963         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 964         union acpi_object *obj;
 965         struct acpi_madt_io_sapic *iosapic;
 966         unsigned int gsi_base;
 967         int pxm, node;
 968
 969         /* Only care about objects w/ a method that returns the MADT */
 970         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 971                 return AE_OK;
 972
 973         if (!buffer.length || !buffer.pointer)
 974                 return AE_OK;
 975
 976         obj = buffer.pointer;
 977         if (obj->type != ACPI_TYPE_BUFFER ||
 978             obj->buffer.length < sizeof(*iosapic)) {
 979                 kfree(buffer.pointer);
 980                 return AE_OK;
 981         }
 982
 983         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
 984
 985         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
 986                 kfree(buffer.pointer);
 987                 return AE_OK;
 988         }
 989
 990         gsi_base = iosapic->global_irq_base;
 991
 992         kfree(buffer.pointer);
 993
 994         /*
 995          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 996          * us which node to associate this with.
 997          */
 998         pxm = acpi_get_pxm(handle);
 999         if (pxm < 0)
1000                 return AE_OK;
1001
1002         node = pxm_to_node(pxm);
1003
1004         if (node >= MAX_NUMNODES || !node_online(node) ||
1005             cpus_empty(node_to_cpumask(node)))
1006                 return AE_OK;
1007
1008         /* We know a gsi to node mapping! */
1009         map_iosapic_to_node(gsi_base, node);
1010         return AE_OK;
1011 }
1012
1013 static int __init
1014 acpi_map_iosapics (void)
1015 {
1016         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1017         return 0;
1018 }
1019
1020 fs_initcall(acpi_map_iosapics);
1021 #endif                          /* CONFIG_ACPI_NUMA */
1022
1023 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1024 {
1025         int err;
1026
1027         if ((err = iosapic_init(phys_addr, gsi_base)))
1028                 return err;
1029
1030 #ifdef CONFIG_ACPI_NUMA
1031         acpi_map_iosapic(handle, 0, NULL, NULL);
1032 #endif                          /* CONFIG_ACPI_NUMA */
1033
1034         return 0;
1035 }
1036
1037 EXPORT_SYMBOL(acpi_register_ioapic);
1038
1039 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1040 {
1041         return iosapic_remove(gsi_base);
1042 }
1043
1044 EXPORT_SYMBOL(acpi_unregister_ioapic);
1045
1046 /*
1047  * acpi_save_state_mem() - save kernel state
1048  *
1049  * TBD when when IA64 starts to support suspend...
1050  */
1051 int acpi_save_state_mem(void) { return 0; }
1052
1053 /*
1054  * acpi_restore_state()
1055  */
1056 void acpi_restore_state_mem(void) {}
1057
1058 /*
1059  * do_suspend_lowlevel()
1060  */
1061 void do_suspend_lowlevel(void) {}
1062
1063 #endif                          /* CONFIG_ACPI */