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