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 <linux/slab.h>
  48 #include <acpi/processor.h>
  49 #include <asm/io.h>
  50 #include <asm/iosapic.h>
  51 #include <asm/machvec.h>
  52 #include <asm/page.h>
  53 #include <asm/numa.h>
  54 #include <asm/sal.h>
  55 #include <asm/cyclone.h>
  56
  57 #define PREFIX                  "ACPI: "
  58
  59 int acpi_lapic;
  60 unsigned int acpi_cpei_override;
  61 unsigned int acpi_cpei_phys_cpuid;
  62
  63 unsigned long acpi_wakeup_address = 0;
  64
  65 #ifdef CONFIG_IA64_GENERIC
  66 static unsigned long __init acpi_find_rsdp(void)
  67 {
  68         unsigned long rsdp_phys = 0;
  69
  70         if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
  71                 rsdp_phys = efi.acpi20;
  72         else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
  73                 printk(KERN_WARNING PREFIX
  74                        "v1.0/r0.71 tables no longer supported\n");
  75         return rsdp_phys;
  76 }
  77
  78 const char __init *
  79 acpi_get_sysname(void)
  80 {
  81         unsigned long rsdp_phys;
  82         struct acpi_table_rsdp *rsdp;
  83         struct acpi_table_xsdt *xsdt;
  84         struct acpi_table_header *hdr;
  85 #ifdef CONFIG_INTEL_IOMMU
  86         u64 i, nentries;
  87 #endif
  88
  89         rsdp_phys = acpi_find_rsdp();
  90         if (!rsdp_phys) {
  91                 printk(KERN_ERR
  92                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
  93                 return "dig";
  94         }
  95
  96         rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
  97         if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
  98                 printk(KERN_ERR
  99                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
 100                 return "dig";
 101         }
 102
 103         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
 104         hdr = &xsdt->header;
 105         if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
 106                 printk(KERN_ERR
 107                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 108                 return "dig";
 109         }
 110
 111         if (!strcmp(hdr->oem_id, "HP")) {
 112                 return "hpzx1";
 113         } else if (!strcmp(hdr->oem_id, "SGI")) {
 114                 if (!strcmp(hdr->oem_table_id + 4, "UV"))
 115                         return "uv";
 116                 else
 117                         return "sn2";
 118         }
 119
 120 #ifdef CONFIG_INTEL_IOMMU
 121         /* Look for Intel IOMMU */
 122         nentries = (hdr->length - sizeof(*hdr)) /
 123                          sizeof(xsdt->table_offset_entry[0]);
 124         for (i = 0; i < nentries; i++) {
 125                 hdr = __va(xsdt->table_offset_entry[i]);
 126                 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
 127                         sizeof(ACPI_SIG_DMAR) - 1) == 0)
 128                         return "dig_vtd";
 129         }
 130 #endif
 131
 132         return "dig";
 133 }
 134 #endif /* CONFIG_IA64_GENERIC */
 135
 136 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 137
 138 /* Array to record platform interrupt vectors for generic interrupt routing. */
 139 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 140         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 141 };
 142
 143 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 144
 145 /*
 146  * Interrupt routing API for device drivers.  Provides interrupt vector for
 147  * a generic platform event.  Currently only CPEI is implemented.
 148  */
 149 int acpi_request_vector(u32 int_type)
 150 {
 151         int vector = -1;
 152
 153         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 154                 /* corrected platform error interrupt */
 155                 vector = platform_intr_list[int_type];
 156         } else
 157                 printk(KERN_ERR
 158                        "acpi_request_vector(): invalid interrupt type\n");
 159         return vector;
 160 }
 161
 162 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
 163 {
 164         return __va(phys);
 165 }
 166
 167 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
 168 {
 169 }
 170
 171 /* --------------------------------------------------------------------------
 172                             Boot-time Table Parsing
 173    -------------------------------------------------------------------------- */
 174
 175 static int available_cpus __initdata;
 176 struct acpi_table_madt *acpi_madt __initdata;
 177 static u8 has_8259;
 178
 179 static int __init
 180 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 181                           const unsigned long end)
 182 {
 183         struct acpi_madt_local_apic_override *lapic;
 184
 185         lapic = (struct acpi_madt_local_apic_override *)header;
 186
 187         if (BAD_MADT_ENTRY(lapic, end))
 188                 return -EINVAL;
 189
 190         if (lapic->address) {
 191                 iounmap(ipi_base_addr);
 192                 ipi_base_addr = ioremap(lapic->address, 0);
 193         }
 194         return 0;
 195 }
 196
 197 static int __init
 198 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
 199 {
 200         struct acpi_madt_local_sapic *lsapic;
 201
 202         lsapic = (struct acpi_madt_local_sapic *)header;
 203
 204         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
 205
 206         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
 207 #ifdef CONFIG_SMP
 208                 smp_boot_data.cpu_phys_id[available_cpus] =
 209                     (lsapic->id << 8) | lsapic->eid;
 210 #endif
 211                 ++available_cpus;
 212         }
 213
 214         total_cpus++;
 215         return 0;
 216 }
 217
 218 static int __init
 219 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 220 {
 221         struct acpi_madt_local_apic_nmi *lacpi_nmi;
 222
 223         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
 224
 225         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 226                 return -EINVAL;
 227
 228         /* TBD: Support lapic_nmi entries */
 229         return 0;
 230 }
 231
 232 static int __init
 233 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
 234 {
 235         struct acpi_madt_io_sapic *iosapic;
 236
 237         iosapic = (struct acpi_madt_io_sapic *)header;
 238
 239         if (BAD_MADT_ENTRY(iosapic, end))
 240                 return -EINVAL;
 241
 242         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 243 }
 244
 245 static unsigned int __initdata acpi_madt_rev;
 246
 247 static int __init
 248 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
 249                         const unsigned long end)
 250 {
 251         struct acpi_madt_interrupt_source *plintsrc;
 252         int vector;
 253
 254         plintsrc = (struct acpi_madt_interrupt_source *)header;
 255
 256         if (BAD_MADT_ENTRY(plintsrc, end))
 257                 return -EINVAL;
 258
 259         /*
 260          * Get vector assignment for this interrupt, set attributes,
 261          * and program the IOSAPIC routing table.
 262          */
 263         vector = iosapic_register_platform_intr(plintsrc->type,
 264                                                 plintsrc->global_irq,
 265                                                 plintsrc->io_sapic_vector,
 266                                                 plintsrc->eid,
 267                                                 plintsrc->id,
 268                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 269                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 270                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 271                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 272                                                  ACPI_MADT_TRIGGER_EDGE) ?
 273                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
 274
 275         platform_intr_list[plintsrc->type] = vector;
 276         if (acpi_madt_rev > 1) {
 277                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
 278         }
 279
 280         /*
 281          * Save the physical id, so we can check when its being removed
 282          */
 283         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 284
 285         return 0;
 286 }
 287
 288 #ifdef CONFIG_HOTPLUG_CPU
 289 unsigned int can_cpei_retarget(void)
 290 {
 291         extern int cpe_vector;
 292         extern unsigned int force_cpei_retarget;
 293
 294         /*
 295          * Only if CPEI is supported and the override flag
 296          * is present, otherwise return that its re-targettable
 297          * if we are in polling mode.
 298          */
 299         if (cpe_vector > 0) {
 300                 if (acpi_cpei_override || force_cpei_retarget)
 301                         return 1;
 302                 else
 303                         return 0;
 304         }
 305         return 1;
 306 }
 307
 308 unsigned int is_cpu_cpei_target(unsigned int cpu)
 309 {
 310         unsigned int logical_id;
 311
 312         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
 313
 314         if (logical_id == cpu)
 315                 return 1;
 316         else
 317                 return 0;
 318 }
 319
 320 void set_cpei_target_cpu(unsigned int cpu)
 321 {
 322         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
 323 }
 324 #endif
 325
 326 unsigned int get_cpei_target_cpu(void)
 327 {
 328         return acpi_cpei_phys_cpuid;
 329 }
 330
 331 static int __init
 332 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 333                        const unsigned long end)
 334 {
 335         struct acpi_madt_interrupt_override *p;
 336
 337         p = (struct acpi_madt_interrupt_override *)header;
 338
 339         if (BAD_MADT_ENTRY(p, end))
 340                 return -EINVAL;
 341
 342         iosapic_override_isa_irq(p->source_irq, p->global_irq,
 343                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 344                                   ACPI_MADT_POLARITY_ACTIVE_LOW) ?
 345                                  IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
 346                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 347                                  ACPI_MADT_TRIGGER_LEVEL) ?
 348                                  IOSAPIC_LEVEL : IOSAPIC_EDGE);
 349         return 0;
 350 }
 351
 352 static int __init
 353 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 354 {
 355         struct acpi_madt_nmi_source *nmi_src;
 356
 357         nmi_src = (struct acpi_madt_nmi_source *)header;
 358
 359         if (BAD_MADT_ENTRY(nmi_src, end))
 360                 return -EINVAL;
 361
 362         /* TBD: Support nimsrc entries */
 363         return 0;
 364 }
 365
 366 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 367 {
 368         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
 369
 370                 /*
 371                  * Unfortunately ITC_DRIFT is not yet part of the
 372                  * official SAL spec, so the ITC_DRIFT bit is not
 373                  * set by the BIOS on this hardware.
 374                  */
 375                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 376
 377                 cyclone_setup();
 378         }
 379 }
 380
 381 static int __init acpi_parse_madt(struct acpi_table_header *table)
 382 {
 383         acpi_madt = (struct acpi_table_madt *)table;
 384
 385         acpi_madt_rev = acpi_madt->header.revision;
 386
 387         /* remember the value for reference after free_initmem() */
 388 #ifdef CONFIG_ITANIUM
 389         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
 390 #else
 391         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
 392 #endif
 393         iosapic_system_init(has_8259);
 394
 395         /* Get base address of IPI Message Block */
 396
 397         if (acpi_madt->address)
 398                 ipi_base_addr = ioremap(acpi_madt->address, 0);
 399
 400         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 401
 402         acpi_madt_oem_check(acpi_madt->header.oem_id,
 403                             acpi_madt->header.oem_table_id);
 404
 405         return 0;
 406 }
 407
 408 #ifdef CONFIG_ACPI_NUMA
 409
 410 #undef SLIT_DEBUG
 411
 412 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 413
 414 static int __initdata srat_num_cpus;    /* number of cpus */
 415 static u32 pxm_flag[PXM_FLAG_LEN];
 416 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 417 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 418 static struct acpi_table_slit __initdata *slit_table;
 419 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
 420
 421 static int __init
 422 get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
 423 {
 424         int pxm;
 425
 426         pxm = pa->proximity_domain_lo;
 427         if (ia64_platform_is("sn2") || acpi_srat_revision >= 2)
 428                 pxm += pa->proximity_domain_hi[0] << 8;
 429         return pxm;
 430 }
 431
 432 static int __init
 433 get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
 434 {
 435         int pxm;
 436
 437         pxm = ma->proximity_domain;
 438         if (!ia64_platform_is("sn2") && acpi_srat_revision <= 1)
 439                 pxm &= 0xff;
 440
 441         return pxm;
 442 }
 443
 444 /*
 445  * ACPI 2.0 SLIT (System Locality Information Table)
 446  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 447  */
 448 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 449 {
 450         u32 len;
 451
 452         len = sizeof(struct acpi_table_header) + 8
 453             + slit->locality_count * slit->locality_count;
 454         if (slit->header.length != len) {
 455                 printk(KERN_ERR
 456                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 457                        len, slit->header.length);
 458                 return;
 459         }
 460         slit_table = slit;
 461 }
 462
 463 void __init
 464 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
 465 {
 466         int pxm;
 467
 468         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
 469                 return;
 470
 471         if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
 472                 printk_once(KERN_WARNING
 473                             "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
 474                             ARRAY_SIZE(node_cpuid));
 475                 return;
 476         }
 477         pxm = get_processor_proximity_domain(pa);
 478
 479         /* record this node in proximity bitmap */
 480         pxm_bit_set(pxm);
 481
 482         node_cpuid[srat_num_cpus].phys_id =
 483             (pa->apic_id << 8) | (pa->local_sapic_eid);
 484         /* nid should be overridden as logical node id later */
 485         node_cpuid[srat_num_cpus].nid = pxm;
 486         cpumask_set_cpu(srat_num_cpus, &early_cpu_possible_map);
 487         srat_num_cpus++;
 488 }
 489
 490 int __init
 491 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 492 {
 493         unsigned long paddr, size;
 494         int pxm;
 495         struct node_memblk_s *p, *q, *pend;
 496
 497         pxm = get_memory_proximity_domain(ma);
 498
 499         /* fill node memory chunk structure */
 500         paddr = ma->base_address;
 501         size = ma->length;
 502
 503         /* Ignore disabled entries */
 504         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
 505                 return -1;
 506
 507         if (num_node_memblks >= NR_NODE_MEMBLKS) {
 508                 pr_err("NUMA: too many memblk ranges\n");
 509                 return -EINVAL;
 510         }
 511
 512         /* record this node in proximity bitmap */
 513         pxm_bit_set(pxm);
 514
 515         /* Insertion sort based on base address */
 516         pend = &node_memblk[num_node_memblks];
 517         for (p = &node_memblk[0]; p < pend; p++) {
 518                 if (paddr < p->start_paddr)
 519                         break;
 520         }
 521         if (p < pend) {
 522                 for (q = pend - 1; q >= p; q--)
 523                         *(q + 1) = *q;
 524         }
 525         p->start_paddr = paddr;
 526         p->size = size;
 527         p->nid = pxm;
 528         num_node_memblks++;
 529         return 0;
 530 }
 531
 532 void __init acpi_numa_fixup(void)
 533 {
 534         int i, j, node_from, node_to;
 535
 536         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 537         if (srat_num_cpus == 0) {
 538                 node_set_online(0);
 539                 node_cpuid[0].phys_id = hard_smp_processor_id();
 540                 return;
 541         }
 542
 543         /*
 544          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 545          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 546          */
 547         nodes_clear(node_online_map);
 548         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 549                 if (pxm_bit_test(i)) {
 550                         int nid = acpi_map_pxm_to_node(i);
 551                         node_set_online(nid);
 552                 }
 553         }
 554
 555         /* set logical node id in memory chunk structure */
 556         for (i = 0; i < num_node_memblks; i++)
 557                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
 558
 559         /* assign memory bank numbers for each chunk on each node */
 560         for_each_online_node(i) {
 561                 int bank;
 562
 563                 bank = 0;
 564                 for (j = 0; j < num_node_memblks; j++)
 565                         if (node_memblk[j].nid == i)
 566                                 node_memblk[j].bank = bank++;
 567         }
 568
 569         /* set logical node id in cpu structure */
 570         for_each_possible_early_cpu(i)
 571                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
 572
 573         printk(KERN_INFO "Number of logical nodes in system = %d\n",
 574                num_online_nodes());
 575         printk(KERN_INFO "Number of memory chunks in system = %d\n",
 576                num_node_memblks);
 577
 578         if (!slit_table) {
 579                 for (i = 0; i < MAX_NUMNODES; i++)
 580                         for (j = 0; j < MAX_NUMNODES; j++)
 581                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
 582                                                         REMOTE_DISTANCE;
 583                 return;
 584         }
 585
 586         memset(numa_slit, -1, sizeof(numa_slit));
 587         for (i = 0; i < slit_table->locality_count; i++) {
 588                 if (!pxm_bit_test(i))
 589                         continue;
 590                 node_from = pxm_to_node(i);
 591                 for (j = 0; j < slit_table->locality_count; j++) {
 592                         if (!pxm_bit_test(j))
 593                                 continue;
 594                         node_to = pxm_to_node(j);
 595                         node_distance(node_from, node_to) =
 596                             slit_table->entry[i * slit_table->locality_count + j];
 597                 }
 598         }
 599
 600 #ifdef SLIT_DEBUG
 601         printk("ACPI 2.0 SLIT locality table:\n");
 602         for_each_online_node(i) {
 603                 for_each_online_node(j)
 604                     printk("%03d ", node_distance(i, j));
 605                 printk("\n");
 606         }
 607 #endif
 608 }
 609 #endif                          /* CONFIG_ACPI_NUMA */
 610
 611 /*
 612  * success: return IRQ number (>=0)
 613  * failure: return < 0
 614  */
 615 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
 616 {
 617         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 618                 return gsi;
 619
 620         if (has_8259 && gsi < 16)
 621                 return isa_irq_to_vector(gsi);
 622
 623         return iosapic_register_intr(gsi,
 624                                      (polarity ==
 625                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
 626                                      IOSAPIC_POL_LOW,
 627                                      (triggering ==
 628                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
 629                                      IOSAPIC_LEVEL);
 630 }
 631 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 632
 633 void acpi_unregister_gsi(u32 gsi)
 634 {
 635         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 636                 return;
 637
 638         if (has_8259 && gsi < 16)
 639                 return;
 640
 641         iosapic_unregister_intr(gsi);
 642 }
 643 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 644
 645 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 646 {
 647         struct acpi_table_header *fadt_header;
 648         struct acpi_table_fadt *fadt;
 649
 650         fadt_header = (struct acpi_table_header *)table;
 651         if (fadt_header->revision != 3)
 652                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
 653
 654         fadt = (struct acpi_table_fadt *)fadt_header;
 655
 656         acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
 657                                  ACPI_ACTIVE_LOW);
 658         return 0;
 659 }
 660
 661 int __init early_acpi_boot_init(void)
 662 {
 663         int ret;
 664
 665         /*
 666          * do a partial walk of MADT to determine how many CPUs
 667          * we have including offline CPUs
 668          */
 669         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 670                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 671                 return 0;
 672         }
 673
 674         ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 675                 acpi_parse_lsapic, NR_CPUS);
 676         if (ret < 1)
 677                 printk(KERN_ERR PREFIX
 678                        "Error parsing MADT - no LAPIC entries\n");
 679         else
 680                 acpi_lapic = 1;
 681
 682 #ifdef CONFIG_SMP
 683         if (available_cpus == 0) {
 684                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 685                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 686                 smp_boot_data.cpu_phys_id[available_cpus] =
 687                     hard_smp_processor_id();
 688                 available_cpus = 1;     /* We've got at least one of these, no? */
 689         }
 690         smp_boot_data.cpu_count = available_cpus;
 691 #endif
 692         /* Make boot-up look pretty */
 693         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 694                total_cpus);
 695
 696         return 0;
 697 }
 698
 699 int __init acpi_boot_init(void)
 700 {
 701
 702         /*
 703          * MADT
 704          * ----
 705          * Parse the Multiple APIC Description Table (MADT), if exists.
 706          * Note that this table provides platform SMP configuration
 707          * information -- the successor to MPS tables.
 708          */
 709
 710         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 711                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 712                 goto skip_madt;
 713         }
 714
 715         /* Local APIC */
 716
 717         if (acpi_table_parse_madt
 718             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
 719                 printk(KERN_ERR PREFIX
 720                        "Error parsing LAPIC address override entry\n");
 721
 722         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
 723             < 0)
 724                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 725
 726         /* I/O APIC */
 727
 728         if (acpi_table_parse_madt
 729             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
 730                 if (!ia64_platform_is("sn2"))
 731                         printk(KERN_ERR PREFIX
 732                                "Error parsing MADT - no IOSAPIC entries\n");
 733         }
 734
 735         /* System-Level Interrupt Routing */
 736
 737         if (acpi_table_parse_madt
 738             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
 739              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 740                 printk(KERN_ERR PREFIX
 741                        "Error parsing platform interrupt source entry\n");
 742
 743         if (acpi_table_parse_madt
 744             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
 745                 printk(KERN_ERR PREFIX
 746                        "Error parsing interrupt source overrides entry\n");
 747
 748         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
 749                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 750       skip_madt:
 751
 752         /*
 753          * FADT says whether a legacy keyboard controller is present.
 754          * The FADT also contains an SCI_INT line, by which the system
 755          * gets interrupts such as power and sleep buttons.  If it's not
 756          * on a Legacy interrupt, it needs to be setup.
 757          */
 758         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
 759                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 760
 761 #ifdef CONFIG_ACPI_NUMA
 762 #ifdef CONFIG_SMP
 763         if (srat_num_cpus == 0) {
 764                 int cpu, i = 1;
 765                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 766                         if (smp_boot_data.cpu_phys_id[cpu] !=
 767                             hard_smp_processor_id())
 768                                 node_cpuid[i++].phys_id =
 769                                     smp_boot_data.cpu_phys_id[cpu];
 770         }
 771 #endif
 772         build_cpu_to_node_map();
 773 #endif
 774         return 0;
 775 }
 776
 777 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 778 {
 779         int tmp;
 780
 781         if (has_8259 && gsi < 16)
 782                 *irq = isa_irq_to_vector(gsi);
 783         else {
 784                 tmp = gsi_to_irq(gsi);
 785                 if (tmp == -1)
 786                         return -1;
 787                 *irq = tmp;
 788         }
 789         return 0;
 790 }
 791
 792 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 793 {
 794         if (isa_irq >= 16)
 795                 return -1;
 796         *gsi = isa_irq;
 797         return 0;
 798 }
 799
 800 /*
 801  *  ACPI based hotplug CPU support
 802  */
 803 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 804 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 805 {
 806 #ifdef CONFIG_ACPI_NUMA
 807         /*
 808          * We don't have cpu-only-node hotadd. But if the system equips
 809          * SRAT table, pxm is already found and node is ready.
 810          * So, just pxm_to_nid(pxm) is OK.
 811          * This code here is for the system which doesn't have full SRAT
 812          * table for possible cpus.
 813          */
 814         node_cpuid[cpu].phys_id = physid;
 815         node_cpuid[cpu].nid = acpi_get_node(handle);
 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_mask 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_mask 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_cpu_ids)
 864                 possible = nr_cpu_ids;
 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                 set_cpu_possible(i, true);
 871 }
 872
 873 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
 874 {
 875         cpumask_t tmp_map;
 876         int cpu;
 877
 878         cpumask_complement(&tmp_map, cpu_present_mask);
 879         cpu = cpumask_first(&tmp_map);
 880         if (cpu >= nr_cpu_ids)
 881                 return -EINVAL;
 882
 883         acpi_map_cpu2node(handle, cpu, physid);
 884
 885         set_cpu_present(cpu, true);
 886         ia64_cpu_to_sapicid[cpu] = physid;
 887
 888         acpi_processor_set_pdc(handle);
 889
 890         *pcpu = cpu;
 891         return (0);
 892 }
 893
 894 /* wrapper to silence section mismatch warning */
 895 int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
 896                        int *pcpu)
 897 {
 898         return _acpi_map_lsapic(handle, physid, pcpu);
 899 }
 900 EXPORT_SYMBOL(acpi_map_cpu);
 901
 902 int acpi_unmap_cpu(int cpu)
 903 {
 904         ia64_cpu_to_sapicid[cpu] = -1;
 905         set_cpu_present(cpu, false);
 906
 907 #ifdef CONFIG_ACPI_NUMA
 908         /* NUMA specific cleanup's */
 909 #endif
 910
 911         return (0);
 912 }
 913 EXPORT_SYMBOL(acpi_unmap_cpu);
 914 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 915
 916 #ifdef CONFIG_ACPI_NUMA
 917 static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
 918                                     void *context, void **ret)
 919 {
 920         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 921         union acpi_object *obj;
 922         struct acpi_madt_io_sapic *iosapic;
 923         unsigned int gsi_base;
 924         int node;
 925
 926         /* Only care about objects w/ a method that returns the MADT */
 927         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 928                 return AE_OK;
 929
 930         if (!buffer.length || !buffer.pointer)
 931                 return AE_OK;
 932
 933         obj = buffer.pointer;
 934         if (obj->type != ACPI_TYPE_BUFFER ||
 935             obj->buffer.length < sizeof(*iosapic)) {
 936                 kfree(buffer.pointer);
 937                 return AE_OK;
 938         }
 939
 940         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
 941
 942         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
 943                 kfree(buffer.pointer);
 944                 return AE_OK;
 945         }
 946
 947         gsi_base = iosapic->global_irq_base;
 948
 949         kfree(buffer.pointer);
 950
 951         /* OK, it's an IOSAPIC MADT entry; associate it with a node */
 952         node = acpi_get_node(handle);
 953         if (node == NUMA_NO_NODE || !node_online(node) ||
 954             cpumask_empty(cpumask_of_node(node)))
 955                 return AE_OK;
 956
 957         /* We know a gsi to node mapping! */
 958         map_iosapic_to_node(gsi_base, node);
 959         return AE_OK;
 960 }
 961
 962 static int __init
 963 acpi_map_iosapics (void)
 964 {
 965         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
 966         return 0;
 967 }
 968
 969 fs_initcall(acpi_map_iosapics);
 970 #endif                          /* CONFIG_ACPI_NUMA */
 971
 972 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 973 {
 974         int err;
 975
 976         if ((err = iosapic_init(phys_addr, gsi_base)))
 977                 return err;
 978
 979 #ifdef CONFIG_ACPI_NUMA
 980         acpi_map_iosapic(handle, 0, NULL, NULL);
 981 #endif                          /* CONFIG_ACPI_NUMA */
 982
 983         return 0;
 984 }
 985
 986 EXPORT_SYMBOL(acpi_register_ioapic);
 987
 988 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 989 {
 990         return iosapic_remove(gsi_base);
 991 }
 992
 993 EXPORT_SYMBOL(acpi_unregister_ioapic);
 994
 995 /*
 996  * acpi_suspend_lowlevel() - save kernel state and suspend.
 997  *
 998  * TBD when when IA64 starts to support suspend...
 999  */
1000 int acpi_suspend_lowlevel(void) { return 0; }