1 /* 2 * acpi.c - Architecture-Specific Low-Level ACPI Support 3 * 4 * Copyright (C) 1999 VA Linux Systems 5 * Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com> 6 * Copyright (C) 2000, 2002-2003 Hewlett-Packard Co. 7 * David Mosberger-Tang <davidm@hpl.hp.com> 8 * Copyright (C) 2000 Intel Corp. 9 * Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com> 10 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 11 * Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com> 12 * Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com> 13 * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de> 14 * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com> 15 * 16 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 17 * 18 * This program is free software; you can redistribute it and/or modify 19 * it under the terms of the GNU General Public License as published by 20 * the Free Software Foundation; either version 2 of the License, or 21 * (at your option) any later version. 22 * 23 * This program is distributed in the hope that it will be useful, 24 * but WITHOUT ANY WARRANTY; without even the implied warranty of 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 26 * GNU General Public License for more details. 27 * 28 * You should have received a copy of the GNU General Public License 29 * along with this program; if not, write to the Free Software 30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 31 * 32 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 33 */ 34 35 #include <linux/module.h> 36 #include <linux/init.h> 37 #include <linux/kernel.h> 38 #include <linux/sched.h> 39 #include <linux/smp.h> 40 #include <linux/string.h> 41 #include <linux/types.h> 42 #include <linux/irq.h> 43 #include <linux/acpi.h> 44 #include <linux/efi.h> 45 #include <linux/mmzone.h> 46 #include <linux/nodemask.h> 47 #include <asm/io.h> 48 #include <asm/iosapic.h> 49 #include <asm/machvec.h> 50 #include <asm/page.h> 51 #include <asm/system.h> 52 #include <asm/numa.h> 53 #include <asm/sal.h> 54 #include <asm/cyclone.h> 55 #include <asm/xen/hypervisor.h> 56 57 #define BAD_MADT_ENTRY(entry, end) ( \ 58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 60 61 #define PREFIX "ACPI: " 62 63 void (*pm_idle) (void); 64 EXPORT_SYMBOL(pm_idle); 65 void (*pm_power_off) (void); 66 EXPORT_SYMBOL(pm_power_off); 67 68 unsigned int acpi_cpei_override; 69 unsigned int acpi_cpei_phys_cpuid; 70 71 unsigned long acpi_wakeup_address = 0; 72 73 #ifdef CONFIG_IA64_GENERIC 74 static unsigned long __init acpi_find_rsdp(void) 75 { 76 unsigned long rsdp_phys = 0; 77 78 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) 79 rsdp_phys = efi.acpi20; 80 else if (efi.acpi != EFI_INVALID_TABLE_ADDR) 81 printk(KERN_WARNING PREFIX 82 "v1.0/r0.71 tables no longer supported\n"); 83 return rsdp_phys; 84 } 85 #endif 86 87 const char __init * 88 acpi_get_sysname(void) 89 { 90 #ifdef CONFIG_IA64_GENERIC 91 unsigned long rsdp_phys; 92 struct acpi_table_rsdp *rsdp; 93 struct acpi_table_xsdt *xsdt; 94 struct acpi_table_header *hdr; 95 #ifdef CONFIG_DMAR 96 u64 i, nentries; 97 #endif 98 99 rsdp_phys = acpi_find_rsdp(); 100 if (!rsdp_phys) { 101 printk(KERN_ERR 102 "ACPI 2.0 RSDP not found, default to \"dig\"\n"); 103 return "dig"; 104 } 105 106 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys); 107 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) { 108 printk(KERN_ERR 109 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n"); 110 return "dig"; 111 } 112 113 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address); 114 hdr = &xsdt->header; 115 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) { 116 printk(KERN_ERR 117 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n"); 118 return "dig"; 119 } 120 121 if (!strcmp(hdr->oem_id, "HP")) { 122 return "hpzx1"; 123 } else if (!strcmp(hdr->oem_id, "SGI")) { 124 if (!strcmp(hdr->oem_table_id + 4, "UV")) 125 return "uv"; 126 else 127 return "sn2"; 128 } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) { 129 return "xen"; 130 } 131 132 #ifdef CONFIG_DMAR 133 /* Look for Intel IOMMU */ 134 nentries = (hdr->length - sizeof(*hdr)) / 135 sizeof(xsdt->table_offset_entry[0]); 136 for (i = 0; i < nentries; i++) { 137 hdr = __va(xsdt->table_offset_entry[i]); 138 if (strncmp(hdr->signature, ACPI_SIG_DMAR, 139 sizeof(ACPI_SIG_DMAR) - 1) == 0) 140 return "dig_vtd"; 141 } 142 #endif 143 144 return "dig"; 145 #else 146 # if defined (CONFIG_IA64_HP_SIM) 147 return "hpsim"; 148 # elif defined (CONFIG_IA64_HP_ZX1) 149 return "hpzx1"; 150 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB) 151 return "hpzx1_swiotlb"; 152 # elif defined (CONFIG_IA64_SGI_SN2) 153 return "sn2"; 154 # elif defined (CONFIG_IA64_SGI_UV) 155 return "uv"; 156 # elif defined (CONFIG_IA64_DIG) 157 return "dig"; 158 # elif defined (CONFIG_IA64_XEN_GUEST) 159 return "xen"; 160 # elif defined(CONFIG_IA64_DIG_VTD) 161 return "dig_vtd"; 162 # else 163 # error Unknown platform. Fix acpi.c. 164 # endif 165 #endif 166 } 167 168 #ifdef CONFIG_ACPI 169 170 #define ACPI_MAX_PLATFORM_INTERRUPTS 256 171 172 /* Array to record platform interrupt vectors for generic interrupt routing. */ 173 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = { 174 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1 175 }; 176 177 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC; 178 179 /* 180 * Interrupt routing API for device drivers. Provides interrupt vector for 181 * a generic platform event. Currently only CPEI is implemented. 182 */ 183 int acpi_request_vector(u32 int_type) 184 { 185 int vector = -1; 186 187 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) { 188 /* corrected platform error interrupt */ 189 vector = platform_intr_list[int_type]; 190 } else 191 printk(KERN_ERR 192 "acpi_request_vector(): invalid interrupt type\n"); 193 return vector; 194 } 195 196 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size) 197 { 198 return __va(phys_addr); 199 } 200 201 /* -------------------------------------------------------------------------- 202 Boot-time Table Parsing 203 -------------------------------------------------------------------------- */ 204 205 static int total_cpus __initdata; 206 static int available_cpus __initdata; 207 struct acpi_table_madt *acpi_madt __initdata; 208 static u8 has_8259; 209 210 static int __init 211 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 212 const unsigned long end) 213 { 214 struct acpi_madt_local_apic_override *lapic; 215 216 lapic = (struct acpi_madt_local_apic_override *)header; 217 218 if (BAD_MADT_ENTRY(lapic, end)) 219 return -EINVAL; 220 221 if (lapic->address) { 222 iounmap(ipi_base_addr); 223 ipi_base_addr = ioremap(lapic->address, 0); 224 } 225 return 0; 226 } 227 228 static int __init 229 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end) 230 { 231 struct acpi_madt_local_sapic *lsapic; 232 233 lsapic = (struct acpi_madt_local_sapic *)header; 234 235 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */ 236 237 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { 238 #ifdef CONFIG_SMP 239 smp_boot_data.cpu_phys_id[available_cpus] = 240 (lsapic->id << 8) | lsapic->eid; 241 #endif 242 ++available_cpus; 243 } 244 245 total_cpus++; 246 return 0; 247 } 248 249 static int __init 250 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 251 { 252 struct acpi_madt_local_apic_nmi *lacpi_nmi; 253 254 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header; 255 256 if (BAD_MADT_ENTRY(lacpi_nmi, end)) 257 return -EINVAL; 258 259 /* TBD: Support lapic_nmi entries */ 260 return 0; 261 } 262 263 static int __init 264 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end) 265 { 266 struct acpi_madt_io_sapic *iosapic; 267 268 iosapic = (struct acpi_madt_io_sapic *)header; 269 270 if (BAD_MADT_ENTRY(iosapic, end)) 271 return -EINVAL; 272 273 return iosapic_init(iosapic->address, iosapic->global_irq_base); 274 } 275 276 static unsigned int __initdata acpi_madt_rev; 277 278 static int __init 279 acpi_parse_plat_int_src(struct acpi_subtable_header * header, 280 const unsigned long end) 281 { 282 struct acpi_madt_interrupt_source *plintsrc; 283 int vector; 284 285 plintsrc = (struct acpi_madt_interrupt_source *)header; 286 287 if (BAD_MADT_ENTRY(plintsrc, end)) 288 return -EINVAL; 289 290 /* 291 * Get vector assignment for this interrupt, set attributes, 292 * and program the IOSAPIC routing table. 293 */ 294 vector = iosapic_register_platform_intr(plintsrc->type, 295 plintsrc->global_irq, 296 plintsrc->io_sapic_vector, 297 plintsrc->eid, 298 plintsrc->id, 299 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) == 300 ACPI_MADT_POLARITY_ACTIVE_HIGH) ? 301 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, 302 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) == 303 ACPI_MADT_TRIGGER_EDGE) ? 304 IOSAPIC_EDGE : IOSAPIC_LEVEL); 305 306 platform_intr_list[plintsrc->type] = vector; 307 if (acpi_madt_rev > 1) { 308 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE; 309 } 310 311 /* 312 * Save the physical id, so we can check when its being removed 313 */ 314 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff; 315 316 return 0; 317 } 318 319 #ifdef CONFIG_HOTPLUG_CPU 320 unsigned int can_cpei_retarget(void) 321 { 322 extern int cpe_vector; 323 extern unsigned int force_cpei_retarget; 324 325 /* 326 * Only if CPEI is supported and the override flag 327 * is present, otherwise return that its re-targettable 328 * if we are in polling mode. 329 */ 330 if (cpe_vector > 0) { 331 if (acpi_cpei_override || force_cpei_retarget) 332 return 1; 333 else 334 return 0; 335 } 336 return 1; 337 } 338 339 unsigned int is_cpu_cpei_target(unsigned int cpu) 340 { 341 unsigned int logical_id; 342 343 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid); 344 345 if (logical_id == cpu) 346 return 1; 347 else 348 return 0; 349 } 350 351 void set_cpei_target_cpu(unsigned int cpu) 352 { 353 acpi_cpei_phys_cpuid = cpu_physical_id(cpu); 354 } 355 #endif 356 357 unsigned int get_cpei_target_cpu(void) 358 { 359 return acpi_cpei_phys_cpuid; 360 } 361 362 static int __init 363 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 364 const unsigned long end) 365 { 366 struct acpi_madt_interrupt_override *p; 367 368 p = (struct acpi_madt_interrupt_override *)header; 369 370 if (BAD_MADT_ENTRY(p, end)) 371 return -EINVAL; 372 373 iosapic_override_isa_irq(p->source_irq, p->global_irq, 374 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) == 375 ACPI_MADT_POLARITY_ACTIVE_HIGH) ? 376 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, 377 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) == 378 ACPI_MADT_TRIGGER_EDGE) ? 379 IOSAPIC_EDGE : IOSAPIC_LEVEL); 380 return 0; 381 } 382 383 static int __init 384 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 385 { 386 struct acpi_madt_nmi_source *nmi_src; 387 388 nmi_src = (struct acpi_madt_nmi_source *)header; 389 390 if (BAD_MADT_ENTRY(nmi_src, end)) 391 return -EINVAL; 392 393 /* TBD: Support nimsrc entries */ 394 return 0; 395 } 396 397 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) 398 { 399 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) { 400 401 /* 402 * Unfortunately ITC_DRIFT is not yet part of the 403 * official SAL spec, so the ITC_DRIFT bit is not 404 * set by the BIOS on this hardware. 405 */ 406 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT; 407 408 cyclone_setup(); 409 } 410 } 411 412 static int __init acpi_parse_madt(struct acpi_table_header *table) 413 { 414 if (!table) 415 return -EINVAL; 416 417 acpi_madt = (struct acpi_table_madt *)table; 418 419 acpi_madt_rev = acpi_madt->header.revision; 420 421 /* remember the value for reference after free_initmem() */ 422 #ifdef CONFIG_ITANIUM 423 has_8259 = 1; /* Firmware on old Itanium systems is broken */ 424 #else 425 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT; 426 #endif 427 iosapic_system_init(has_8259); 428 429 /* Get base address of IPI Message Block */ 430 431 if (acpi_madt->address) 432 ipi_base_addr = ioremap(acpi_madt->address, 0); 433 434 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr); 435 436 acpi_madt_oem_check(acpi_madt->header.oem_id, 437 acpi_madt->header.oem_table_id); 438 439 return 0; 440 } 441 442 #ifdef CONFIG_ACPI_NUMA 443 444 #undef SLIT_DEBUG 445 446 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32) 447 448 static int __initdata srat_num_cpus; /* number of cpus */ 449 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN]; 450 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag)) 451 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag)) 452 static struct acpi_table_slit __initdata *slit_table; 453 cpumask_t early_cpu_possible_map = CPU_MASK_NONE; 454 455 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa) 456 { 457 int pxm; 458 459 pxm = pa->proximity_domain_lo; 460 if (ia64_platform_is("sn2")) 461 pxm += pa->proximity_domain_hi[0] << 8; 462 return pxm; 463 } 464 465 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma) 466 { 467 int pxm; 468 469 pxm = ma->proximity_domain; 470 if (!ia64_platform_is("sn2")) 471 pxm &= 0xff; 472 473 return pxm; 474 } 475 476 /* 477 * ACPI 2.0 SLIT (System Locality Information Table) 478 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf 479 */ 480 void __init acpi_numa_slit_init(struct acpi_table_slit *slit) 481 { 482 u32 len; 483 484 len = sizeof(struct acpi_table_header) + 8 485 + slit->locality_count * slit->locality_count; 486 if (slit->header.length != len) { 487 printk(KERN_ERR 488 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n", 489 len, slit->header.length); 490 return; 491 } 492 slit_table = slit; 493 } 494 495 void __init 496 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) 497 { 498 int pxm; 499 500 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED)) 501 return; 502 503 pxm = get_processor_proximity_domain(pa); 504 505 /* record this node in proximity bitmap */ 506 pxm_bit_set(pxm); 507 508 node_cpuid[srat_num_cpus].phys_id = 509 (pa->apic_id << 8) | (pa->local_sapic_eid); 510 /* nid should be overridden as logical node id later */ 511 node_cpuid[srat_num_cpus].nid = pxm; 512 cpu_set(srat_num_cpus, early_cpu_possible_map); 513 srat_num_cpus++; 514 } 515 516 void __init 517 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) 518 { 519 unsigned long paddr, size; 520 int pxm; 521 struct node_memblk_s *p, *q, *pend; 522 523 pxm = get_memory_proximity_domain(ma); 524 525 /* fill node memory chunk structure */ 526 paddr = ma->base_address; 527 size = ma->length; 528 529 /* Ignore disabled entries */ 530 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED)) 531 return; 532 533 /* record this node in proximity bitmap */ 534 pxm_bit_set(pxm); 535 536 /* Insertion sort based on base address */ 537 pend = &node_memblk[num_node_memblks]; 538 for (p = &node_memblk[0]; p < pend; p++) { 539 if (paddr < p->start_paddr) 540 break; 541 } 542 if (p < pend) { 543 for (q = pend - 1; q >= p; q--) 544 *(q + 1) = *q; 545 } 546 p->start_paddr = paddr; 547 p->size = size; 548 p->nid = pxm; 549 num_node_memblks++; 550 } 551 552 void __init acpi_numa_arch_fixup(void) 553 { 554 int i, j, node_from, node_to; 555 556 /* If there's no SRAT, fix the phys_id and mark node 0 online */ 557 if (srat_num_cpus == 0) { 558 node_set_online(0); 559 node_cpuid[0].phys_id = hard_smp_processor_id(); 560 return; 561 } 562 563 /* 564 * MCD - This can probably be dropped now. No need for pxm ID to node ID 565 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES. 566 */ 567 nodes_clear(node_online_map); 568 for (i = 0; i < MAX_PXM_DOMAINS; i++) { 569 if (pxm_bit_test(i)) { 570 int nid = acpi_map_pxm_to_node(i); 571 node_set_online(nid); 572 } 573 } 574 575 /* set logical node id in memory chunk structure */ 576 for (i = 0; i < num_node_memblks; i++) 577 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid); 578 579 /* assign memory bank numbers for each chunk on each node */ 580 for_each_online_node(i) { 581 int bank; 582 583 bank = 0; 584 for (j = 0; j < num_node_memblks; j++) 585 if (node_memblk[j].nid == i) 586 node_memblk[j].bank = bank++; 587 } 588 589 /* set logical node id in cpu structure */ 590 for_each_possible_early_cpu(i) 591 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid); 592 593 printk(KERN_INFO "Number of logical nodes in system = %d\n", 594 num_online_nodes()); 595 printk(KERN_INFO "Number of memory chunks in system = %d\n", 596 num_node_memblks); 597 598 if (!slit_table) { 599 for (i = 0; i < MAX_NUMNODES; i++) 600 for (j = 0; j < MAX_NUMNODES; j++) 601 node_distance(i, j) = i == j ? LOCAL_DISTANCE : 602 REMOTE_DISTANCE; 603 return; 604 } 605 606 memset(numa_slit, -1, sizeof(numa_slit)); 607 for (i = 0; i < slit_table->locality_count; i++) { 608 if (!pxm_bit_test(i)) 609 continue; 610 node_from = pxm_to_node(i); 611 for (j = 0; j < slit_table->locality_count; j++) { 612 if (!pxm_bit_test(j)) 613 continue; 614 node_to = pxm_to_node(j); 615 node_distance(node_from, node_to) = 616 slit_table->entry[i * slit_table->locality_count + j]; 617 } 618 } 619 620 #ifdef SLIT_DEBUG 621 printk("ACPI 2.0 SLIT locality table:\n"); 622 for_each_online_node(i) { 623 for_each_online_node(j) 624 printk("%03d ", node_distance(i, j)); 625 printk("\n"); 626 } 627 #endif 628 } 629 #endif /* CONFIG_ACPI_NUMA */ 630 631 /* 632 * success: return IRQ number (>=0) 633 * failure: return < 0 634 */ 635 int acpi_register_gsi(u32 gsi, int triggering, int polarity) 636 { 637 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) 638 return gsi; 639 640 if (has_8259 && gsi < 16) 641 return isa_irq_to_vector(gsi); 642 643 return iosapic_register_intr(gsi, 644 (polarity == 645 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : 646 IOSAPIC_POL_LOW, 647 (triggering == 648 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : 649 IOSAPIC_LEVEL); 650 } 651 652 void acpi_unregister_gsi(u32 gsi) 653 { 654 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) 655 return; 656 657 if (has_8259 && gsi < 16) 658 return; 659 660 iosapic_unregister_intr(gsi); 661 } 662 663 static int __init acpi_parse_fadt(struct acpi_table_header *table) 664 { 665 struct acpi_table_header *fadt_header; 666 struct acpi_table_fadt *fadt; 667 668 if (!table) 669 return -EINVAL; 670 671 fadt_header = (struct acpi_table_header *)table; 672 if (fadt_header->revision != 3) 673 return -ENODEV; /* Only deal with ACPI 2.0 FADT */ 674 675 fadt = (struct acpi_table_fadt *)fadt_header; 676 677 acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW); 678 return 0; 679 } 680 681 int __init acpi_boot_init(void) 682 { 683 684 /* 685 * MADT 686 * ---- 687 * Parse the Multiple APIC Description Table (MADT), if exists. 688 * Note that this table provides platform SMP configuration 689 * information -- the successor to MPS tables. 690 */ 691 692 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 693 printk(KERN_ERR PREFIX "Can't find MADT\n"); 694 goto skip_madt; 695 } 696 697 /* Local APIC */ 698 699 if (acpi_table_parse_madt 700 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0) 701 printk(KERN_ERR PREFIX 702 "Error parsing LAPIC address override entry\n"); 703 704 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_lsapic, NR_CPUS) 705 < 1) 706 printk(KERN_ERR PREFIX 707 "Error parsing MADT - no LAPIC entries\n"); 708 709 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0) 710 < 0) 711 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 712 713 /* I/O APIC */ 714 715 if (acpi_table_parse_madt 716 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) { 717 if (!ia64_platform_is("sn2")) 718 printk(KERN_ERR PREFIX 719 "Error parsing MADT - no IOSAPIC entries\n"); 720 } 721 722 /* System-Level Interrupt Routing */ 723 724 if (acpi_table_parse_madt 725 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src, 726 ACPI_MAX_PLATFORM_INTERRUPTS) < 0) 727 printk(KERN_ERR PREFIX 728 "Error parsing platform interrupt source entry\n"); 729 730 if (acpi_table_parse_madt 731 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0) 732 printk(KERN_ERR PREFIX 733 "Error parsing interrupt source overrides entry\n"); 734 735 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0) 736 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 737 skip_madt: 738 739 /* 740 * FADT says whether a legacy keyboard controller is present. 741 * The FADT also contains an SCI_INT line, by which the system 742 * gets interrupts such as power and sleep buttons. If it's not 743 * on a Legacy interrupt, it needs to be setup. 744 */ 745 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt)) 746 printk(KERN_ERR PREFIX "Can't find FADT\n"); 747 748 #ifdef CONFIG_SMP 749 if (available_cpus == 0) { 750 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n"); 751 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id()); 752 smp_boot_data.cpu_phys_id[available_cpus] = 753 hard_smp_processor_id(); 754 available_cpus = 1; /* We've got at least one of these, no? */ 755 } 756 smp_boot_data.cpu_count = available_cpus; 757 758 smp_build_cpu_map(); 759 # ifdef CONFIG_ACPI_NUMA 760 if (srat_num_cpus == 0) { 761 int cpu, i = 1; 762 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++) 763 if (smp_boot_data.cpu_phys_id[cpu] != 764 hard_smp_processor_id()) 765 node_cpuid[i++].phys_id = 766 smp_boot_data.cpu_phys_id[cpu]; 767 } 768 # endif 769 #endif 770 #ifdef CONFIG_ACPI_NUMA 771 build_cpu_to_node_map(); 772 #endif 773 /* Make boot-up look pretty */ 774 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, 775 total_cpus); 776 return 0; 777 } 778 779 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 780 { 781 int tmp; 782 783 if (has_8259 && gsi < 16) 784 *irq = isa_irq_to_vector(gsi); 785 else { 786 tmp = gsi_to_irq(gsi); 787 if (tmp == -1) 788 return -1; 789 *irq = tmp; 790 } 791 return 0; 792 } 793 794 /* 795 * ACPI based hotplug CPU support 796 */ 797 #ifdef CONFIG_ACPI_HOTPLUG_CPU 798 static 799 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 800 { 801 #ifdef CONFIG_ACPI_NUMA 802 int pxm_id; 803 int nid; 804 805 pxm_id = acpi_get_pxm(handle); 806 /* 807 * We don't have cpu-only-node hotadd. But if the system equips 808 * SRAT table, pxm is already found and node is ready. 809 * So, just pxm_to_nid(pxm) is OK. 810 * This code here is for the system which doesn't have full SRAT 811 * table for possible cpus. 812 */ 813 nid = acpi_map_pxm_to_node(pxm_id); 814 node_cpuid[cpu].phys_id = physid; 815 node_cpuid[cpu].nid = nid; 816 #endif 817 return (0); 818 } 819 820 int additional_cpus __initdata = -1; 821 822 static __init int setup_additional_cpus(char *s) 823 { 824 if (s) 825 additional_cpus = simple_strtol(s, NULL, 0); 826 827 return 0; 828 } 829 830 early_param("additional_cpus", setup_additional_cpus); 831 832 /* 833 * cpu_possible_map should be static, it cannot change as CPUs 834 * are onlined, or offlined. The reason is per-cpu data-structures 835 * are allocated by some modules at init time, and dont expect to 836 * do this dynamically on cpu arrival/departure. 837 * cpu_present_map on the other hand can change dynamically. 838 * In case when cpu_hotplug is not compiled, then we resort to current 839 * behaviour, which is cpu_possible == cpu_present. 840 * - Ashok Raj 841 * 842 * Three ways to find out the number of additional hotplug CPUs: 843 * - If the BIOS specified disabled CPUs in ACPI/mptables use that. 844 * - The user can overwrite it with additional_cpus=NUM 845 * - Otherwise don't reserve additional CPUs. 846 */ 847 __init void prefill_possible_map(void) 848 { 849 int i; 850 int possible, disabled_cpus; 851 852 disabled_cpus = total_cpus - available_cpus; 853 854 if (additional_cpus == -1) { 855 if (disabled_cpus > 0) 856 additional_cpus = disabled_cpus; 857 else 858 additional_cpus = 0; 859 } 860 861 possible = available_cpus + additional_cpus; 862 863 if (possible > NR_CPUS) 864 possible = NR_CPUS; 865 866 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n", 867 possible, max((possible - available_cpus), 0)); 868 869 for (i = 0; i < possible; i++) 870 cpu_set(i, cpu_possible_map); 871 } 872 873 int acpi_map_lsapic(acpi_handle handle, int *pcpu) 874 { 875 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 876 union acpi_object *obj; 877 struct acpi_madt_local_sapic *lsapic; 878 cpumask_t tmp_map; 879 int cpu, physid; 880 881 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 882 return -EINVAL; 883 884 if (!buffer.length || !buffer.pointer) 885 return -EINVAL; 886 887 obj = buffer.pointer; 888 if (obj->type != ACPI_TYPE_BUFFER) 889 { 890 kfree(buffer.pointer); 891 return -EINVAL; 892 } 893 894 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer; 895 896 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) || 897 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) { 898 kfree(buffer.pointer); 899 return -EINVAL; 900 } 901 902 physid = ((lsapic->id << 8) | (lsapic->eid)); 903 904 kfree(buffer.pointer); 905 buffer.length = ACPI_ALLOCATE_BUFFER; 906 buffer.pointer = NULL; 907 908 cpus_complement(tmp_map, cpu_present_map); 909 cpu = first_cpu(tmp_map); 910 if (cpu >= NR_CPUS) 911 return -EINVAL; 912 913 acpi_map_cpu2node(handle, cpu, physid); 914 915 cpu_set(cpu, cpu_present_map); 916 ia64_cpu_to_sapicid[cpu] = physid; 917 918 *pcpu = cpu; 919 return (0); 920 } 921 922 EXPORT_SYMBOL(acpi_map_lsapic); 923 924 int acpi_unmap_lsapic(int cpu) 925 { 926 ia64_cpu_to_sapicid[cpu] = -1; 927 cpu_clear(cpu, cpu_present_map); 928 929 #ifdef CONFIG_ACPI_NUMA 930 /* NUMA specific cleanup's */ 931 #endif 932 933 return (0); 934 } 935 936 EXPORT_SYMBOL(acpi_unmap_lsapic); 937 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 938 939 #ifdef CONFIG_ACPI_NUMA 940 static acpi_status __devinit 941 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret) 942 { 943 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 944 union acpi_object *obj; 945 struct acpi_madt_io_sapic *iosapic; 946 unsigned int gsi_base; 947 int pxm, node; 948 949 /* Only care about objects w/ a method that returns the MADT */ 950 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 951 return AE_OK; 952 953 if (!buffer.length || !buffer.pointer) 954 return AE_OK; 955 956 obj = buffer.pointer; 957 if (obj->type != ACPI_TYPE_BUFFER || 958 obj->buffer.length < sizeof(*iosapic)) { 959 kfree(buffer.pointer); 960 return AE_OK; 961 } 962 963 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer; 964 965 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) { 966 kfree(buffer.pointer); 967 return AE_OK; 968 } 969 970 gsi_base = iosapic->global_irq_base; 971 972 kfree(buffer.pointer); 973 974 /* 975 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell 976 * us which node to associate this with. 977 */ 978 pxm = acpi_get_pxm(handle); 979 if (pxm < 0) 980 return AE_OK; 981 982 node = pxm_to_node(pxm); 983 984 if (node >= MAX_NUMNODES || !node_online(node) || 985 cpus_empty(node_to_cpumask(node))) 986 return AE_OK; 987 988 /* We know a gsi to node mapping! */ 989 map_iosapic_to_node(gsi_base, node); 990 return AE_OK; 991 } 992 993 static int __init 994 acpi_map_iosapics (void) 995 { 996 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL); 997 return 0; 998 } 999 1000 fs_initcall(acpi_map_iosapics); 1001 #endif /* CONFIG_ACPI_NUMA */ 1002 1003 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 1004 { 1005 int err; 1006 1007 if ((err = iosapic_init(phys_addr, gsi_base))) 1008 return err; 1009 1010 #ifdef CONFIG_ACPI_NUMA 1011 acpi_map_iosapic(handle, 0, NULL, NULL); 1012 #endif /* CONFIG_ACPI_NUMA */ 1013 1014 return 0; 1015 } 1016 1017 EXPORT_SYMBOL(acpi_register_ioapic); 1018 1019 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 1020 { 1021 return iosapic_remove(gsi_base); 1022 } 1023 1024 EXPORT_SYMBOL(acpi_unregister_ioapic); 1025 1026 /* 1027 * acpi_save_state_mem() - save kernel state 1028 * 1029 * TBD when when IA64 starts to support suspend... 1030 */ 1031 int acpi_save_state_mem(void) { return 0; } 1032 1033 /* 1034 * acpi_restore_state() 1035 */ 1036 void acpi_restore_state_mem(void) {} 1037 1038 /* 1039 * do_suspend_lowlevel() 1040 */ 1041 void do_suspend_lowlevel(void) {} 1042 1043 #endif /* CONFIG_ACPI */ 1044