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
  56 #define BAD_MADT_ENTRY(entry, end) (                                        \
  57                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  58                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  59
  60 #define PREFIX                  "ACPI: "
  61
  62 void (*pm_idle) (void);
  63 EXPORT_SYMBOL(pm_idle);
  64 void (*pm_power_off) (void);
  65 EXPORT_SYMBOL(pm_power_off);
  66
  67 unsigned int acpi_cpei_override;
  68 unsigned int acpi_cpei_phys_cpuid;
  69
  70 unsigned long acpi_wakeup_address = 0;
  71
  72 #ifdef CONFIG_IA64_GENERIC
  73 static unsigned long __init acpi_find_rsdp(void)
  74 {
  75         unsigned long rsdp_phys = 0;
  76
  77         if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
  78                 rsdp_phys = efi.acpi20;
  79         else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
  80                 printk(KERN_WARNING PREFIX
  81                        "v1.0/r0.71 tables no longer supported\n");
  82         return rsdp_phys;
  83 }
  84 #endif
  85
  86 const char __init *
  87 acpi_get_sysname(void)
  88 {
  89 #ifdef CONFIG_IA64_GENERIC
  90         unsigned long rsdp_phys;
  91         struct acpi_table_rsdp *rsdp;
  92         struct acpi_table_xsdt *xsdt;
  93         struct acpi_table_header *hdr;
  94 #ifdef CONFIG_DMAR
  95         u64 i, nentries;
  96 #endif
  97
  98         rsdp_phys = acpi_find_rsdp();
  99         if (!rsdp_phys) {
 100                 printk(KERN_ERR
 101                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
 102                 return "dig";
 103         }
 104
 105         rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
 106         if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
 107                 printk(KERN_ERR
 108                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
 109                 return "dig";
 110         }
 111
 112         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
 113         hdr = &xsdt->header;
 114         if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
 115                 printk(KERN_ERR
 116                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
 117                 return "dig";
 118         }
 119
 120         if (!strcmp(hdr->oem_id, "HP")) {
 121                 return "hpzx1";
 122         } else if (!strcmp(hdr->oem_id, "SGI")) {
 123                 if (!strcmp(hdr->oem_table_id + 4, "UV"))
 124                         return "uv";
 125                 else
 126                         return "sn2";
 127         }
 128
 129 #ifdef CONFIG_DMAR
 130         /* Look for Intel IOMMU */
 131         nentries = (hdr->length - sizeof(*hdr)) /
 132                          sizeof(xsdt->table_offset_entry[0]);
 133         for (i = 0; i < nentries; i++) {
 134                 hdr = __va(xsdt->table_offset_entry[i]);
 135                 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
 136                         sizeof(ACPI_SIG_DMAR) - 1) == 0)
 137                         return "dig_vtd";
 138         }
 139 #endif
 140
 141         return "dig";
 142 #else
 143 # if defined (CONFIG_IA64_HP_SIM)
 144         return "hpsim";
 145 # elif defined (CONFIG_IA64_HP_ZX1)
 146         return "hpzx1";
 147 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
 148         return "hpzx1_swiotlb";
 149 # elif defined (CONFIG_IA64_SGI_SN2)
 150         return "sn2";
 151 # elif defined (CONFIG_IA64_SGI_UV)
 152         return "uv";
 153 # elif defined (CONFIG_IA64_DIG)
 154         return "dig";
 155 # elif defined(CONFIG_IA64_DIG_VTD)
 156         return "dig_vtd";
 157 # else
 158 #       error Unknown platform.  Fix acpi.c.
 159 # endif
 160 #endif
 161 }
 162
 163 #ifdef CONFIG_ACPI
 164
 165 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
 166
 167 /* Array to record platform interrupt vectors for generic interrupt routing. */
 168 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
 169         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
 170 };
 171
 172 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
 173
 174 /*
 175  * Interrupt routing API for device drivers.  Provides interrupt vector for
 176  * a generic platform event.  Currently only CPEI is implemented.
 177  */
 178 int acpi_request_vector(u32 int_type)
 179 {
 180         int vector = -1;
 181
 182         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
 183                 /* corrected platform error interrupt */
 184                 vector = platform_intr_list[int_type];
 185         } else
 186                 printk(KERN_ERR
 187                        "acpi_request_vector(): invalid interrupt type\n");
 188         return vector;
 189 }
 190
 191 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
 192 {
 193         return __va(phys_addr);
 194 }
 195
 196 /* --------------------------------------------------------------------------
 197                             Boot-time Table Parsing
 198    -------------------------------------------------------------------------- */
 199
 200 static int total_cpus __initdata;
 201 static int available_cpus __initdata;
 202 struct acpi_table_madt *acpi_madt __initdata;
 203 static u8 has_8259;
 204
 205 static int __init
 206 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 207                           const unsigned long end)
 208 {
 209         struct acpi_madt_local_apic_override *lapic;
 210
 211         lapic = (struct acpi_madt_local_apic_override *)header;
 212
 213         if (BAD_MADT_ENTRY(lapic, end))
 214                 return -EINVAL;
 215
 216         if (lapic->address) {
 217                 iounmap(ipi_base_addr);
 218                 ipi_base_addr = ioremap(lapic->address, 0);
 219         }
 220         return 0;
 221 }
 222
 223 static int __init
 224 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
 225 {
 226         struct acpi_madt_local_sapic *lsapic;
 227
 228         lsapic = (struct acpi_madt_local_sapic *)header;
 229
 230         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
 231
 232         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
 233 #ifdef CONFIG_SMP
 234                 smp_boot_data.cpu_phys_id[available_cpus] =
 235                     (lsapic->id << 8) | lsapic->eid;
 236 #endif
 237                 ++available_cpus;
 238         }
 239
 240         total_cpus++;
 241         return 0;
 242 }
 243
 244 static int __init
 245 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 246 {
 247         struct acpi_madt_local_apic_nmi *lacpi_nmi;
 248
 249         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
 250
 251         if (BAD_MADT_ENTRY(lacpi_nmi, end))
 252                 return -EINVAL;
 253
 254         /* TBD: Support lapic_nmi entries */
 255         return 0;
 256 }
 257
 258 static int __init
 259 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
 260 {
 261         struct acpi_madt_io_sapic *iosapic;
 262
 263         iosapic = (struct acpi_madt_io_sapic *)header;
 264
 265         if (BAD_MADT_ENTRY(iosapic, end))
 266                 return -EINVAL;
 267
 268         return iosapic_init(iosapic->address, iosapic->global_irq_base);
 269 }
 270
 271 static unsigned int __initdata acpi_madt_rev;
 272
 273 static int __init
 274 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
 275                         const unsigned long end)
 276 {
 277         struct acpi_madt_interrupt_source *plintsrc;
 278         int vector;
 279
 280         plintsrc = (struct acpi_madt_interrupt_source *)header;
 281
 282         if (BAD_MADT_ENTRY(plintsrc, end))
 283                 return -EINVAL;
 284
 285         /*
 286          * Get vector assignment for this interrupt, set attributes,
 287          * and program the IOSAPIC routing table.
 288          */
 289         vector = iosapic_register_platform_intr(plintsrc->type,
 290                                                 plintsrc->global_irq,
 291                                                 plintsrc->io_sapic_vector,
 292                                                 plintsrc->eid,
 293                                                 plintsrc->id,
 294                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 295                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 296                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 297                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 298                                                  ACPI_MADT_TRIGGER_EDGE) ?
 299                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
 300
 301         platform_intr_list[plintsrc->type] = vector;
 302         if (acpi_madt_rev > 1) {
 303                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
 304         }
 305
 306         /*
 307          * Save the physical id, so we can check when its being removed
 308          */
 309         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
 310
 311         return 0;
 312 }
 313
 314 #ifdef CONFIG_HOTPLUG_CPU
 315 unsigned int can_cpei_retarget(void)
 316 {
 317         extern int cpe_vector;
 318         extern unsigned int force_cpei_retarget;
 319
 320         /*
 321          * Only if CPEI is supported and the override flag
 322          * is present, otherwise return that its re-targettable
 323          * if we are in polling mode.
 324          */
 325         if (cpe_vector > 0) {
 326                 if (acpi_cpei_override || force_cpei_retarget)
 327                         return 1;
 328                 else
 329                         return 0;
 330         }
 331         return 1;
 332 }
 333
 334 unsigned int is_cpu_cpei_target(unsigned int cpu)
 335 {
 336         unsigned int logical_id;
 337
 338         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
 339
 340         if (logical_id == cpu)
 341                 return 1;
 342         else
 343                 return 0;
 344 }
 345
 346 void set_cpei_target_cpu(unsigned int cpu)
 347 {
 348         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
 349 }
 350 #endif
 351
 352 unsigned int get_cpei_target_cpu(void)
 353 {
 354         return acpi_cpei_phys_cpuid;
 355 }
 356
 357 static int __init
 358 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 359                        const unsigned long end)
 360 {
 361         struct acpi_madt_interrupt_override *p;
 362
 363         p = (struct acpi_madt_interrupt_override *)header;
 364
 365         if (BAD_MADT_ENTRY(p, end))
 366                 return -EINVAL;
 367
 368         iosapic_override_isa_irq(p->source_irq, p->global_irq,
 369                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
 370                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
 371                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
 372                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
 373                                  ACPI_MADT_TRIGGER_EDGE) ?
 374                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
 375         return 0;
 376 }
 377
 378 static int __init
 379 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 380 {
 381         struct acpi_madt_nmi_source *nmi_src;
 382
 383         nmi_src = (struct acpi_madt_nmi_source *)header;
 384
 385         if (BAD_MADT_ENTRY(nmi_src, end))
 386                 return -EINVAL;
 387
 388         /* TBD: Support nimsrc entries */
 389         return 0;
 390 }
 391
 392 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 393 {
 394         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
 395
 396                 /*
 397                  * Unfortunately ITC_DRIFT is not yet part of the
 398                  * official SAL spec, so the ITC_DRIFT bit is not
 399                  * set by the BIOS on this hardware.
 400                  */
 401                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
 402
 403                 cyclone_setup();
 404         }
 405 }
 406
 407 static int __init acpi_parse_madt(struct acpi_table_header *table)
 408 {
 409         if (!table)
 410                 return -EINVAL;
 411
 412         acpi_madt = (struct acpi_table_madt *)table;
 413
 414         acpi_madt_rev = acpi_madt->header.revision;
 415
 416         /* remember the value for reference after free_initmem() */
 417 #ifdef CONFIG_ITANIUM
 418         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
 419 #else
 420         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
 421 #endif
 422         iosapic_system_init(has_8259);
 423
 424         /* Get base address of IPI Message Block */
 425
 426         if (acpi_madt->address)
 427                 ipi_base_addr = ioremap(acpi_madt->address, 0);
 428
 429         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
 430
 431         acpi_madt_oem_check(acpi_madt->header.oem_id,
 432                             acpi_madt->header.oem_table_id);
 433
 434         return 0;
 435 }
 436
 437 #ifdef CONFIG_ACPI_NUMA
 438
 439 #undef SLIT_DEBUG
 440
 441 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
 442
 443 static int __initdata srat_num_cpus;    /* number of cpus */
 444 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
 445 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
 446 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
 447 static struct acpi_table_slit __initdata *slit_table;
 448 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
 449
 450 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
 451 {
 452         int pxm;
 453
 454         pxm = pa->proximity_domain_lo;
 455         if (ia64_platform_is("sn2"))
 456                 pxm += pa->proximity_domain_hi[0] << 8;
 457         return pxm;
 458 }
 459
 460 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
 461 {
 462         int pxm;
 463
 464         pxm = ma->proximity_domain;
 465         if (!ia64_platform_is("sn2"))
 466                 pxm &= 0xff;
 467
 468         return pxm;
 469 }
 470
 471 /*
 472  * ACPI 2.0 SLIT (System Locality Information Table)
 473  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 474  */
 475 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 476 {
 477         u32 len;
 478
 479         len = sizeof(struct acpi_table_header) + 8
 480             + slit->locality_count * slit->locality_count;
 481         if (slit->header.length != len) {
 482                 printk(KERN_ERR
 483                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 484                        len, slit->header.length);
 485                 return;
 486         }
 487         slit_table = slit;
 488 }
 489
 490 void __init
 491 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
 492 {
 493         int pxm;
 494
 495         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
 496                 return;
 497
 498         pxm = get_processor_proximity_domain(pa);
 499
 500         /* record this node in proximity bitmap */
 501         pxm_bit_set(pxm);
 502
 503         node_cpuid[srat_num_cpus].phys_id =
 504             (pa->apic_id << 8) | (pa->local_sapic_eid);
 505         /* nid should be overridden as logical node id later */
 506         node_cpuid[srat_num_cpus].nid = pxm;
 507         cpu_set(srat_num_cpus, early_cpu_possible_map);
 508         srat_num_cpus++;
 509 }
 510
 511 void __init
 512 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 513 {
 514         unsigned long paddr, size;
 515         int pxm;
 516         struct node_memblk_s *p, *q, *pend;
 517
 518         pxm = get_memory_proximity_domain(ma);
 519
 520         /* fill node memory chunk structure */
 521         paddr = ma->base_address;
 522         size = ma->length;
 523
 524         /* Ignore disabled entries */
 525         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
 526                 return;
 527
 528         /* record this node in proximity bitmap */
 529         pxm_bit_set(pxm);
 530
 531         /* Insertion sort based on base address */
 532         pend = &node_memblk[num_node_memblks];
 533         for (p = &node_memblk[0]; p < pend; p++) {
 534                 if (paddr < p->start_paddr)
 535                         break;
 536         }
 537         if (p < pend) {
 538                 for (q = pend - 1; q >= p; q--)
 539                         *(q + 1) = *q;
 540         }
 541         p->start_paddr = paddr;
 542         p->size = size;
 543         p->nid = pxm;
 544         num_node_memblks++;
 545 }
 546
 547 void __init acpi_numa_arch_fixup(void)
 548 {
 549         int i, j, node_from, node_to;
 550
 551         /* If there's no SRAT, fix the phys_id and mark node 0 online */
 552         if (srat_num_cpus == 0) {
 553                 node_set_online(0);
 554                 node_cpuid[0].phys_id = hard_smp_processor_id();
 555                 return;
 556         }
 557
 558         /*
 559          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
 560          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
 561          */
 562         nodes_clear(node_online_map);
 563         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
 564                 if (pxm_bit_test(i)) {
 565                         int nid = acpi_map_pxm_to_node(i);
 566                         node_set_online(nid);
 567                 }
 568         }
 569
 570         /* set logical node id in memory chunk structure */
 571         for (i = 0; i < num_node_memblks; i++)
 572                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
 573
 574         /* assign memory bank numbers for each chunk on each node */
 575         for_each_online_node(i) {
 576                 int bank;
 577
 578                 bank = 0;
 579                 for (j = 0; j < num_node_memblks; j++)
 580                         if (node_memblk[j].nid == i)
 581                                 node_memblk[j].bank = bank++;
 582         }
 583
 584         /* set logical node id in cpu structure */
 585         for_each_possible_early_cpu(i)
 586                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
 587
 588         printk(KERN_INFO "Number of logical nodes in system = %d\n",
 589                num_online_nodes());
 590         printk(KERN_INFO "Number of memory chunks in system = %d\n",
 591                num_node_memblks);
 592
 593         if (!slit_table) {
 594                 for (i = 0; i < MAX_NUMNODES; i++)
 595                         for (j = 0; j < MAX_NUMNODES; j++)
 596                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
 597                                                         REMOTE_DISTANCE;
 598                 return;
 599         }
 600
 601         memset(numa_slit, -1, sizeof(numa_slit));
 602         for (i = 0; i < slit_table->locality_count; i++) {
 603                 if (!pxm_bit_test(i))
 604                         continue;
 605                 node_from = pxm_to_node(i);
 606                 for (j = 0; j < slit_table->locality_count; j++) {
 607                         if (!pxm_bit_test(j))
 608                                 continue;
 609                         node_to = pxm_to_node(j);
 610                         node_distance(node_from, node_to) =
 611                             slit_table->entry[i * slit_table->locality_count + j];
 612                 }
 613         }
 614
 615 #ifdef SLIT_DEBUG
 616         printk("ACPI 2.0 SLIT locality table:\n");
 617         for_each_online_node(i) {
 618                 for_each_online_node(j)
 619                     printk("%03d ", node_distance(i, j));
 620                 printk("\n");
 621         }
 622 #endif
 623 }
 624 #endif                          /* CONFIG_ACPI_NUMA */
 625
 626 /*
 627  * success: return IRQ number (>=0)
 628  * failure: return < 0
 629  */
 630 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 631 {
 632         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 633                 return gsi;
 634
 635         if (has_8259 && gsi < 16)
 636                 return isa_irq_to_vector(gsi);
 637
 638         return iosapic_register_intr(gsi,
 639                                      (polarity ==
 640                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
 641                                      IOSAPIC_POL_LOW,
 642                                      (triggering ==
 643                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
 644                                      IOSAPIC_LEVEL);
 645 }
 646
 647 void acpi_unregister_gsi(u32 gsi)
 648 {
 649         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 650                 return;
 651
 652         if (has_8259 && gsi < 16)
 653                 return;
 654
 655         iosapic_unregister_intr(gsi);
 656 }
 657
 658 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 659 {
 660         struct acpi_table_header *fadt_header;
 661         struct acpi_table_fadt *fadt;
 662
 663         if (!table)
 664                 return -EINVAL;
 665
 666         fadt_header = (struct acpi_table_header *)table;
 667         if (fadt_header->revision != 3)
 668                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
 669
 670         fadt = (struct acpi_table_fadt *)fadt_header;
 671
 672         acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
 673         return 0;
 674 }
 675
 676 int __init acpi_boot_init(void)
 677 {
 678
 679         /*
 680          * MADT
 681          * ----
 682          * Parse the Multiple APIC Description Table (MADT), if exists.
 683          * Note that this table provides platform SMP configuration
 684          * information -- the successor to MPS tables.
 685          */
 686
 687         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
 688                 printk(KERN_ERR PREFIX "Can't find MADT\n");
 689                 goto skip_madt;
 690         }
 691
 692         /* Local APIC */
 693
 694         if (acpi_table_parse_madt
 695             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
 696                 printk(KERN_ERR PREFIX
 697                        "Error parsing LAPIC address override entry\n");
 698
 699         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_lsapic, NR_CPUS)
 700             < 1)
 701                 printk(KERN_ERR PREFIX
 702                        "Error parsing MADT - no LAPIC entries\n");
 703
 704         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
 705             < 0)
 706                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 707
 708         /* I/O APIC */
 709
 710         if (acpi_table_parse_madt
 711             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
 712                 if (!ia64_platform_is("sn2"))
 713                         printk(KERN_ERR PREFIX
 714                                "Error parsing MADT - no IOSAPIC entries\n");
 715         }
 716
 717         /* System-Level Interrupt Routing */
 718
 719         if (acpi_table_parse_madt
 720             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
 721              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
 722                 printk(KERN_ERR PREFIX
 723                        "Error parsing platform interrupt source entry\n");
 724
 725         if (acpi_table_parse_madt
 726             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
 727                 printk(KERN_ERR PREFIX
 728                        "Error parsing interrupt source overrides entry\n");
 729
 730         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
 731                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 732       skip_madt:
 733
 734         /*
 735          * FADT says whether a legacy keyboard controller is present.
 736          * The FADT also contains an SCI_INT line, by which the system
 737          * gets interrupts such as power and sleep buttons.  If it's not
 738          * on a Legacy interrupt, it needs to be setup.
 739          */
 740         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
 741                 printk(KERN_ERR PREFIX "Can't find FADT\n");
 742
 743 #ifdef CONFIG_SMP
 744         if (available_cpus == 0) {
 745                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
 746                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
 747                 smp_boot_data.cpu_phys_id[available_cpus] =
 748                     hard_smp_processor_id();
 749                 available_cpus = 1;     /* We've got at least one of these, no? */
 750         }
 751         smp_boot_data.cpu_count = available_cpus;
 752
 753         smp_build_cpu_map();
 754 # ifdef CONFIG_ACPI_NUMA
 755         if (srat_num_cpus == 0) {
 756                 int cpu, i = 1;
 757                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
 758                         if (smp_boot_data.cpu_phys_id[cpu] !=
 759                             hard_smp_processor_id())
 760                                 node_cpuid[i++].phys_id =
 761                                     smp_boot_data.cpu_phys_id[cpu];
 762         }
 763 # endif
 764 #endif
 765 #ifdef CONFIG_ACPI_NUMA
 766         build_cpu_to_node_map();
 767 #endif
 768         /* Make boot-up look pretty */
 769         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
 770                total_cpus);
 771         return 0;
 772 }
 773
 774 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 775 {
 776         int tmp;
 777
 778         if (has_8259 && gsi < 16)
 779                 *irq = isa_irq_to_vector(gsi);
 780         else {
 781                 tmp = gsi_to_irq(gsi);
 782                 if (tmp == -1)
 783                         return -1;
 784                 *irq = tmp;
 785         }
 786         return 0;
 787 }
 788
 789 /*
 790  *  ACPI based hotplug CPU support
 791  */
 792 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 793 static
 794 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 795 {
 796 #ifdef CONFIG_ACPI_NUMA
 797         int pxm_id;
 798         int nid;
 799
 800         pxm_id = acpi_get_pxm(handle);
 801         /*
 802          * We don't have cpu-only-node hotadd. But if the system equips
 803          * SRAT table, pxm is already found and node is ready.
 804          * So, just pxm_to_nid(pxm) is OK.
 805          * This code here is for the system which doesn't have full SRAT
 806          * table for possible cpus.
 807          */
 808         nid = acpi_map_pxm_to_node(pxm_id);
 809         node_cpuid[cpu].phys_id = physid;
 810         node_cpuid[cpu].nid = nid;
 811 #endif
 812         return (0);
 813 }
 814
 815 int additional_cpus __initdata = -1;
 816
 817 static __init int setup_additional_cpus(char *s)
 818 {
 819         if (s)
 820                 additional_cpus = simple_strtol(s, NULL, 0);
 821
 822         return 0;
 823 }
 824
 825 early_param("additional_cpus", setup_additional_cpus);
 826
 827 /*
 828  * cpu_possible_map should be static, it cannot change as CPUs
 829  * are onlined, or offlined. The reason is per-cpu data-structures
 830  * are allocated by some modules at init time, and dont expect to
 831  * do this dynamically on cpu arrival/departure.
 832  * cpu_present_map on the other hand can change dynamically.
 833  * In case when cpu_hotplug is not compiled, then we resort to current
 834  * behaviour, which is cpu_possible == cpu_present.
 835  * - Ashok Raj
 836  *
 837  * Three ways to find out the number of additional hotplug CPUs:
 838  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
 839  * - The user can overwrite it with additional_cpus=NUM
 840  * - Otherwise don't reserve additional CPUs.
 841  */
 842 __init void prefill_possible_map(void)
 843 {
 844         int i;
 845         int possible, disabled_cpus;
 846
 847         disabled_cpus = total_cpus - available_cpus;
 848
 849         if (additional_cpus == -1) {
 850                 if (disabled_cpus > 0)
 851                         additional_cpus = disabled_cpus;
 852                 else
 853                         additional_cpus = 0;
 854         }
 855
 856         possible = available_cpus + additional_cpus;
 857
 858         if (possible > NR_CPUS)
 859                 possible = NR_CPUS;
 860
 861         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
 862                 possible, max((possible - available_cpus), 0));
 863
 864         for (i = 0; i < possible; i++)
 865                 cpu_set(i, cpu_possible_map);
 866 }
 867
 868 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 869 {
 870         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 871         union acpi_object *obj;
 872         struct acpi_madt_local_sapic *lsapic;
 873         cpumask_t tmp_map;
 874         int cpu, physid;
 875
 876         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 877                 return -EINVAL;
 878
 879         if (!buffer.length || !buffer.pointer)
 880                 return -EINVAL;
 881
 882         obj = buffer.pointer;
 883         if (obj->type != ACPI_TYPE_BUFFER)
 884         {
 885                 kfree(buffer.pointer);
 886                 return -EINVAL;
 887         }
 888
 889         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
 890
 891         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
 892             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
 893                 kfree(buffer.pointer);
 894                 return -EINVAL;
 895         }
 896
 897         physid = ((lsapic->id << 8) | (lsapic->eid));
 898
 899         kfree(buffer.pointer);
 900         buffer.length = ACPI_ALLOCATE_BUFFER;
 901         buffer.pointer = NULL;
 902
 903         cpus_complement(tmp_map, cpu_present_map);
 904         cpu = first_cpu(tmp_map);
 905         if (cpu >= NR_CPUS)
 906                 return -EINVAL;
 907
 908         acpi_map_cpu2node(handle, cpu, physid);
 909
 910         cpu_set(cpu, cpu_present_map);
 911         ia64_cpu_to_sapicid[cpu] = physid;
 912
 913         *pcpu = cpu;
 914         return (0);
 915 }
 916
 917 EXPORT_SYMBOL(acpi_map_lsapic);
 918
 919 int acpi_unmap_lsapic(int cpu)
 920 {
 921         ia64_cpu_to_sapicid[cpu] = -1;
 922         cpu_clear(cpu, cpu_present_map);
 923
 924 #ifdef CONFIG_ACPI_NUMA
 925         /* NUMA specific cleanup's */
 926 #endif
 927
 928         return (0);
 929 }
 930
 931 EXPORT_SYMBOL(acpi_unmap_lsapic);
 932 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 933
 934 #ifdef CONFIG_ACPI_NUMA
 935 static acpi_status __devinit
 936 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
 937 {
 938         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 939         union acpi_object *obj;
 940         struct acpi_madt_io_sapic *iosapic;
 941         unsigned int gsi_base;
 942         int pxm, node;
 943
 944         /* Only care about objects w/ a method that returns the MADT */
 945         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 946                 return AE_OK;
 947
 948         if (!buffer.length || !buffer.pointer)
 949                 return AE_OK;
 950
 951         obj = buffer.pointer;
 952         if (obj->type != ACPI_TYPE_BUFFER ||
 953             obj->buffer.length < sizeof(*iosapic)) {
 954                 kfree(buffer.pointer);
 955                 return AE_OK;
 956         }
 957
 958         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
 959
 960         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
 961                 kfree(buffer.pointer);
 962                 return AE_OK;
 963         }
 964
 965         gsi_base = iosapic->global_irq_base;
 966
 967         kfree(buffer.pointer);
 968
 969         /*
 970          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
 971          * us which node to associate this with.
 972          */
 973         pxm = acpi_get_pxm(handle);
 974         if (pxm < 0)
 975                 return AE_OK;
 976
 977         node = pxm_to_node(pxm);
 978
 979         if (node >= MAX_NUMNODES || !node_online(node) ||
 980             cpus_empty(node_to_cpumask(node)))
 981                 return AE_OK;
 982
 983         /* We know a gsi to node mapping! */
 984         map_iosapic_to_node(gsi_base, node);
 985         return AE_OK;
 986 }
 987
 988 static int __init
 989 acpi_map_iosapics (void)
 990 {
 991         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
 992         return 0;
 993 }
 994
 995 fs_initcall(acpi_map_iosapics);
 996 #endif                          /* CONFIG_ACPI_NUMA */
 997
 998 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 999 {
1000         int err;
1001
1002         if ((err = iosapic_init(phys_addr, gsi_base)))
1003                 return err;
1004
1005 #ifdef CONFIG_ACPI_NUMA
1006         acpi_map_iosapic(handle, 0, NULL, NULL);
1007 #endif                          /* CONFIG_ACPI_NUMA */
1008
1009         return 0;
1010 }
1011
1012 EXPORT_SYMBOL(acpi_register_ioapic);
1013
1014 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1015 {
1016         return iosapic_remove(gsi_base);
1017 }
1018
1019 EXPORT_SYMBOL(acpi_unregister_ioapic);
1020
1021 /*
1022  * acpi_save_state_mem() - save kernel state
1023  *
1024  * TBD when when IA64 starts to support suspend...
1025  */
1026 int acpi_save_state_mem(void) { return 0; }
1027
1028 /*
1029  * acpi_restore_state()
1030  */
1031 void acpi_restore_state_mem(void) {}
1032
1033 /*
1034  * do_suspend_lowlevel()
1035  */
1036 void do_suspend_lowlevel(void) {}
1037
1038 #endif                          /* CONFIG_ACPI */