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/system.h> 54 #include <asm/numa.h> 55 #include <asm/sal.h> 56 #include <asm/cyclone.h> 57 #include <asm/xen/hypervisor.h> 58 59 #define BAD_MADT_ENTRY(entry, end) ( \ 60 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 61 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 62 63 #define PREFIX "ACPI: " 64 65 u32 acpi_rsdt_forced; 66 unsigned int acpi_cpei_override; 67 unsigned int acpi_cpei_phys_cpuid; 68 69 unsigned long acpi_wakeup_address = 0; 70 71 #ifdef CONFIG_IA64_GENERIC 72 static unsigned long __init acpi_find_rsdp(void) 73 { 74 unsigned long rsdp_phys = 0; 75 76 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) 77 rsdp_phys = efi.acpi20; 78 else if (efi.acpi != EFI_INVALID_TABLE_ADDR) 79 printk(KERN_WARNING PREFIX 80 "v1.0/r0.71 tables no longer supported\n"); 81 return rsdp_phys; 82 } 83 84 const char __init * 85 acpi_get_sysname(void) 86 { 87 unsigned long rsdp_phys; 88 struct acpi_table_rsdp *rsdp; 89 struct acpi_table_xsdt *xsdt; 90 struct acpi_table_header *hdr; 91 #ifdef CONFIG_DMAR 92 u64 i, nentries; 93 #endif 94 95 rsdp_phys = acpi_find_rsdp(); 96 if (!rsdp_phys) { 97 printk(KERN_ERR 98 "ACPI 2.0 RSDP not found, default to \"dig\"\n"); 99 return "dig"; 100 } 101 102 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys); 103 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) { 104 printk(KERN_ERR 105 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n"); 106 return "dig"; 107 } 108 109 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address); 110 hdr = &xsdt->header; 111 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) { 112 printk(KERN_ERR 113 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n"); 114 return "dig"; 115 } 116 117 if (!strcmp(hdr->oem_id, "HP")) { 118 return "hpzx1"; 119 } else if (!strcmp(hdr->oem_id, "SGI")) { 120 if (!strcmp(hdr->oem_table_id + 4, "UV")) 121 return "uv"; 122 else 123 return "sn2"; 124 } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) { 125 return "xen"; 126 } 127 128 #ifdef CONFIG_DMAR 129 /* Look for Intel IOMMU */ 130 nentries = (hdr->length - sizeof(*hdr)) / 131 sizeof(xsdt->table_offset_entry[0]); 132 for (i = 0; i < nentries; i++) { 133 hdr = __va(xsdt->table_offset_entry[i]); 134 if (strncmp(hdr->signature, ACPI_SIG_DMAR, 135 sizeof(ACPI_SIG_DMAR) - 1) == 0) 136 return "dig_vtd"; 137 } 138 #endif 139 140 return "dig"; 141 } 142 #endif /* CONFIG_IA64_GENERIC */ 143 144 #define ACPI_MAX_PLATFORM_INTERRUPTS 256 145 146 /* Array to record platform interrupt vectors for generic interrupt routing. */ 147 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = { 148 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1 149 }; 150 151 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC; 152 153 /* 154 * Interrupt routing API for device drivers. Provides interrupt vector for 155 * a generic platform event. Currently only CPEI is implemented. 156 */ 157 int acpi_request_vector(u32 int_type) 158 { 159 int vector = -1; 160 161 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) { 162 /* corrected platform error interrupt */ 163 vector = platform_intr_list[int_type]; 164 } else 165 printk(KERN_ERR 166 "acpi_request_vector(): invalid interrupt type\n"); 167 return vector; 168 } 169 170 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size) 171 { 172 return __va(phys_addr); 173 } 174 175 void __init __acpi_unmap_table(char *map, unsigned long size) 176 { 177 } 178 179 /* -------------------------------------------------------------------------- 180 Boot-time Table Parsing 181 -------------------------------------------------------------------------- */ 182 183 static int available_cpus __initdata; 184 struct acpi_table_madt *acpi_madt __initdata; 185 static u8 has_8259; 186 187 static int __init 188 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 189 const unsigned long end) 190 { 191 struct acpi_madt_local_apic_override *lapic; 192 193 lapic = (struct acpi_madt_local_apic_override *)header; 194 195 if (BAD_MADT_ENTRY(lapic, end)) 196 return -EINVAL; 197 198 if (lapic->address) { 199 iounmap(ipi_base_addr); 200 ipi_base_addr = ioremap(lapic->address, 0); 201 } 202 return 0; 203 } 204 205 static int __init 206 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end) 207 { 208 struct acpi_madt_local_sapic *lsapic; 209 210 lsapic = (struct acpi_madt_local_sapic *)header; 211 212 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */ 213 214 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { 215 #ifdef CONFIG_SMP 216 smp_boot_data.cpu_phys_id[available_cpus] = 217 (lsapic->id << 8) | lsapic->eid; 218 #endif 219 ++available_cpus; 220 } 221 222 total_cpus++; 223 return 0; 224 } 225 226 static int __init 227 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 228 { 229 struct acpi_madt_local_apic_nmi *lacpi_nmi; 230 231 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header; 232 233 if (BAD_MADT_ENTRY(lacpi_nmi, end)) 234 return -EINVAL; 235 236 /* TBD: Support lapic_nmi entries */ 237 return 0; 238 } 239 240 static int __init 241 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end) 242 { 243 struct acpi_madt_io_sapic *iosapic; 244 245 iosapic = (struct acpi_madt_io_sapic *)header; 246 247 if (BAD_MADT_ENTRY(iosapic, end)) 248 return -EINVAL; 249 250 return iosapic_init(iosapic->address, iosapic->global_irq_base); 251 } 252 253 static unsigned int __initdata acpi_madt_rev; 254 255 static int __init 256 acpi_parse_plat_int_src(struct acpi_subtable_header * header, 257 const unsigned long end) 258 { 259 struct acpi_madt_interrupt_source *plintsrc; 260 int vector; 261 262 plintsrc = (struct acpi_madt_interrupt_source *)header; 263 264 if (BAD_MADT_ENTRY(plintsrc, end)) 265 return -EINVAL; 266 267 /* 268 * Get vector assignment for this interrupt, set attributes, 269 * and program the IOSAPIC routing table. 270 */ 271 vector = iosapic_register_platform_intr(plintsrc->type, 272 plintsrc->global_irq, 273 plintsrc->io_sapic_vector, 274 plintsrc->eid, 275 plintsrc->id, 276 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) == 277 ACPI_MADT_POLARITY_ACTIVE_HIGH) ? 278 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, 279 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) == 280 ACPI_MADT_TRIGGER_EDGE) ? 281 IOSAPIC_EDGE : IOSAPIC_LEVEL); 282 283 platform_intr_list[plintsrc->type] = vector; 284 if (acpi_madt_rev > 1) { 285 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE; 286 } 287 288 /* 289 * Save the physical id, so we can check when its being removed 290 */ 291 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff; 292 293 return 0; 294 } 295 296 #ifdef CONFIG_HOTPLUG_CPU 297 unsigned int can_cpei_retarget(void) 298 { 299 extern int cpe_vector; 300 extern unsigned int force_cpei_retarget; 301 302 /* 303 * Only if CPEI is supported and the override flag 304 * is present, otherwise return that its re-targettable 305 * if we are in polling mode. 306 */ 307 if (cpe_vector > 0) { 308 if (acpi_cpei_override || force_cpei_retarget) 309 return 1; 310 else 311 return 0; 312 } 313 return 1; 314 } 315 316 unsigned int is_cpu_cpei_target(unsigned int cpu) 317 { 318 unsigned int logical_id; 319 320 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid); 321 322 if (logical_id == cpu) 323 return 1; 324 else 325 return 0; 326 } 327 328 void set_cpei_target_cpu(unsigned int cpu) 329 { 330 acpi_cpei_phys_cpuid = cpu_physical_id(cpu); 331 } 332 #endif 333 334 unsigned int get_cpei_target_cpu(void) 335 { 336 return acpi_cpei_phys_cpuid; 337 } 338 339 static int __init 340 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 341 const unsigned long end) 342 { 343 struct acpi_madt_interrupt_override *p; 344 345 p = (struct acpi_madt_interrupt_override *)header; 346 347 if (BAD_MADT_ENTRY(p, end)) 348 return -EINVAL; 349 350 iosapic_override_isa_irq(p->source_irq, p->global_irq, 351 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) == 352 ACPI_MADT_POLARITY_ACTIVE_HIGH) ? 353 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, 354 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) == 355 ACPI_MADT_TRIGGER_EDGE) ? 356 IOSAPIC_EDGE : IOSAPIC_LEVEL); 357 return 0; 358 } 359 360 static int __init 361 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 362 { 363 struct acpi_madt_nmi_source *nmi_src; 364 365 nmi_src = (struct acpi_madt_nmi_source *)header; 366 367 if (BAD_MADT_ENTRY(nmi_src, end)) 368 return -EINVAL; 369 370 /* TBD: Support nimsrc entries */ 371 return 0; 372 } 373 374 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) 375 { 376 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) { 377 378 /* 379 * Unfortunately ITC_DRIFT is not yet part of the 380 * official SAL spec, so the ITC_DRIFT bit is not 381 * set by the BIOS on this hardware. 382 */ 383 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT; 384 385 cyclone_setup(); 386 } 387 } 388 389 static int __init acpi_parse_madt(struct acpi_table_header *table) 390 { 391 if (!table) 392 return -EINVAL; 393 394 acpi_madt = (struct acpi_table_madt *)table; 395 396 acpi_madt_rev = acpi_madt->header.revision; 397 398 /* remember the value for reference after free_initmem() */ 399 #ifdef CONFIG_ITANIUM 400 has_8259 = 1; /* Firmware on old Itanium systems is broken */ 401 #else 402 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT; 403 #endif 404 iosapic_system_init(has_8259); 405 406 /* Get base address of IPI Message Block */ 407 408 if (acpi_madt->address) 409 ipi_base_addr = ioremap(acpi_madt->address, 0); 410 411 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr); 412 413 acpi_madt_oem_check(acpi_madt->header.oem_id, 414 acpi_madt->header.oem_table_id); 415 416 return 0; 417 } 418 419 #ifdef CONFIG_ACPI_NUMA 420 421 #undef SLIT_DEBUG 422 423 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32) 424 425 static int __initdata srat_num_cpus; /* number of cpus */ 426 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN]; 427 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag)) 428 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag)) 429 static struct acpi_table_slit __initdata *slit_table; 430 cpumask_t early_cpu_possible_map = CPU_MASK_NONE; 431 432 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa) 433 { 434 int pxm; 435 436 pxm = pa->proximity_domain_lo; 437 if (ia64_platform_is("sn2")) 438 pxm += pa->proximity_domain_hi[0] << 8; 439 return pxm; 440 } 441 442 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma) 443 { 444 int pxm; 445 446 pxm = ma->proximity_domain; 447 if (!ia64_platform_is("sn2")) 448 pxm &= 0xff; 449 450 return pxm; 451 } 452 453 /* 454 * ACPI 2.0 SLIT (System Locality Information Table) 455 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf 456 */ 457 void __init acpi_numa_slit_init(struct acpi_table_slit *slit) 458 { 459 u32 len; 460 461 len = sizeof(struct acpi_table_header) + 8 462 + slit->locality_count * slit->locality_count; 463 if (slit->header.length != len) { 464 printk(KERN_ERR 465 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n", 466 len, slit->header.length); 467 return; 468 } 469 slit_table = slit; 470 } 471 472 void __init 473 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) 474 { 475 int pxm; 476 477 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED)) 478 return; 479 480 if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) { 481 printk_once(KERN_WARNING 482 "node_cpuid[%ld] is too small, may not be able to use all cpus\n", 483 ARRAY_SIZE(node_cpuid)); 484 return; 485 } 486 pxm = get_processor_proximity_domain(pa); 487 488 /* record this node in proximity bitmap */ 489 pxm_bit_set(pxm); 490 491 node_cpuid[srat_num_cpus].phys_id = 492 (pa->apic_id << 8) | (pa->local_sapic_eid); 493 /* nid should be overridden as logical node id later */ 494 node_cpuid[srat_num_cpus].nid = pxm; 495 cpu_set(srat_num_cpus, early_cpu_possible_map); 496 srat_num_cpus++; 497 } 498 499 void __init 500 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) 501 { 502 unsigned long paddr, size; 503 int pxm; 504 struct node_memblk_s *p, *q, *pend; 505 506 pxm = get_memory_proximity_domain(ma); 507 508 /* fill node memory chunk structure */ 509 paddr = ma->base_address; 510 size = ma->length; 511 512 /* Ignore disabled entries */ 513 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED)) 514 return; 515 516 /* record this node in proximity bitmap */ 517 pxm_bit_set(pxm); 518 519 /* Insertion sort based on base address */ 520 pend = &node_memblk[num_node_memblks]; 521 for (p = &node_memblk[0]; p < pend; p++) { 522 if (paddr < p->start_paddr) 523 break; 524 } 525 if (p < pend) { 526 for (q = pend - 1; q >= p; q--) 527 *(q + 1) = *q; 528 } 529 p->start_paddr = paddr; 530 p->size = size; 531 p->nid = pxm; 532 num_node_memblks++; 533 } 534 535 void __init acpi_numa_arch_fixup(void) 536 { 537 int i, j, node_from, node_to; 538 539 /* If there's no SRAT, fix the phys_id and mark node 0 online */ 540 if (srat_num_cpus == 0) { 541 node_set_online(0); 542 node_cpuid[0].phys_id = hard_smp_processor_id(); 543 return; 544 } 545 546 /* 547 * MCD - This can probably be dropped now. No need for pxm ID to node ID 548 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES. 549 */ 550 nodes_clear(node_online_map); 551 for (i = 0; i < MAX_PXM_DOMAINS; i++) { 552 if (pxm_bit_test(i)) { 553 int nid = acpi_map_pxm_to_node(i); 554 node_set_online(nid); 555 } 556 } 557 558 /* set logical node id in memory chunk structure */ 559 for (i = 0; i < num_node_memblks; i++) 560 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid); 561 562 /* assign memory bank numbers for each chunk on each node */ 563 for_each_online_node(i) { 564 int bank; 565 566 bank = 0; 567 for (j = 0; j < num_node_memblks; j++) 568 if (node_memblk[j].nid == i) 569 node_memblk[j].bank = bank++; 570 } 571 572 /* set logical node id in cpu structure */ 573 for_each_possible_early_cpu(i) 574 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid); 575 576 printk(KERN_INFO "Number of logical nodes in system = %d\n", 577 num_online_nodes()); 578 printk(KERN_INFO "Number of memory chunks in system = %d\n", 579 num_node_memblks); 580 581 if (!slit_table) { 582 for (i = 0; i < MAX_NUMNODES; i++) 583 for (j = 0; j < MAX_NUMNODES; j++) 584 node_distance(i, j) = i == j ? LOCAL_DISTANCE : 585 REMOTE_DISTANCE; 586 return; 587 } 588 589 memset(numa_slit, -1, sizeof(numa_slit)); 590 for (i = 0; i < slit_table->locality_count; i++) { 591 if (!pxm_bit_test(i)) 592 continue; 593 node_from = pxm_to_node(i); 594 for (j = 0; j < slit_table->locality_count; j++) { 595 if (!pxm_bit_test(j)) 596 continue; 597 node_to = pxm_to_node(j); 598 node_distance(node_from, node_to) = 599 slit_table->entry[i * slit_table->locality_count + j]; 600 } 601 } 602 603 #ifdef SLIT_DEBUG 604 printk("ACPI 2.0 SLIT locality table:\n"); 605 for_each_online_node(i) { 606 for_each_online_node(j) 607 printk("%03d ", node_distance(i, j)); 608 printk("\n"); 609 } 610 #endif 611 } 612 #endif /* CONFIG_ACPI_NUMA */ 613 614 /* 615 * success: return IRQ number (>=0) 616 * failure: return < 0 617 */ 618 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity) 619 { 620 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) 621 return gsi; 622 623 if (has_8259 && gsi < 16) 624 return isa_irq_to_vector(gsi); 625 626 return iosapic_register_intr(gsi, 627 (polarity == 628 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : 629 IOSAPIC_POL_LOW, 630 (triggering == 631 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : 632 IOSAPIC_LEVEL); 633 } 634 635 void acpi_unregister_gsi(u32 gsi) 636 { 637 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) 638 return; 639 640 if (has_8259 && gsi < 16) 641 return; 642 643 iosapic_unregister_intr(gsi); 644 } 645 646 static int __init acpi_parse_fadt(struct acpi_table_header *table) 647 { 648 struct acpi_table_header *fadt_header; 649 struct acpi_table_fadt *fadt; 650 651 if (!table) 652 return -EINVAL; 653 654 fadt_header = (struct acpi_table_header *)table; 655 if (fadt_header->revision != 3) 656 return -ENODEV; /* Only deal with ACPI 2.0 FADT */ 657 658 fadt = (struct acpi_table_fadt *)fadt_header; 659 660 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, 661 ACPI_ACTIVE_LOW); 662 return 0; 663 } 664 665 int __init early_acpi_boot_init(void) 666 { 667 int ret; 668 669 /* 670 * do a partial walk of MADT to determine how many CPUs 671 * we have including offline CPUs 672 */ 673 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 674 printk(KERN_ERR PREFIX "Can't find MADT\n"); 675 return 0; 676 } 677 678 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 679 acpi_parse_lsapic, NR_CPUS); 680 if (ret < 1) 681 printk(KERN_ERR PREFIX 682 "Error parsing MADT - no LAPIC entries\n"); 683 684 #ifdef CONFIG_SMP 685 if (available_cpus == 0) { 686 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n"); 687 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id()); 688 smp_boot_data.cpu_phys_id[available_cpus] = 689 hard_smp_processor_id(); 690 available_cpus = 1; /* We've got at least one of these, no? */ 691 } 692 smp_boot_data.cpu_count = available_cpus; 693 #endif 694 /* Make boot-up look pretty */ 695 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, 696 total_cpus); 697 698 return 0; 699 } 700 701 int __init acpi_boot_init(void) 702 { 703 704 /* 705 * MADT 706 * ---- 707 * Parse the Multiple APIC Description Table (MADT), if exists. 708 * Note that this table provides platform SMP configuration 709 * information -- the successor to MPS tables. 710 */ 711 712 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 713 printk(KERN_ERR PREFIX "Can't find MADT\n"); 714 goto skip_madt; 715 } 716 717 /* Local APIC */ 718 719 if (acpi_table_parse_madt 720 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0) 721 printk(KERN_ERR PREFIX 722 "Error parsing LAPIC address override entry\n"); 723 724 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0) 725 < 0) 726 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 727 728 /* I/O APIC */ 729 730 if (acpi_table_parse_madt 731 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) { 732 if (!ia64_platform_is("sn2")) 733 printk(KERN_ERR PREFIX 734 "Error parsing MADT - no IOSAPIC entries\n"); 735 } 736 737 /* System-Level Interrupt Routing */ 738 739 if (acpi_table_parse_madt 740 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src, 741 ACPI_MAX_PLATFORM_INTERRUPTS) < 0) 742 printk(KERN_ERR PREFIX 743 "Error parsing platform interrupt source entry\n"); 744 745 if (acpi_table_parse_madt 746 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0) 747 printk(KERN_ERR PREFIX 748 "Error parsing interrupt source overrides entry\n"); 749 750 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0) 751 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 752 skip_madt: 753 754 /* 755 * FADT says whether a legacy keyboard controller is present. 756 * The FADT also contains an SCI_INT line, by which the system 757 * gets interrupts such as power and sleep buttons. If it's not 758 * on a Legacy interrupt, it needs to be setup. 759 */ 760 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt)) 761 printk(KERN_ERR PREFIX "Can't find FADT\n"); 762 763 #ifdef CONFIG_ACPI_NUMA 764 #ifdef CONFIG_SMP 765 if (srat_num_cpus == 0) { 766 int cpu, i = 1; 767 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++) 768 if (smp_boot_data.cpu_phys_id[cpu] != 769 hard_smp_processor_id()) 770 node_cpuid[i++].phys_id = 771 smp_boot_data.cpu_phys_id[cpu]; 772 } 773 #endif 774 build_cpu_to_node_map(); 775 #endif 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 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 795 { 796 if (isa_irq >= 16) 797 return -1; 798 *gsi = isa_irq; 799 return 0; 800 } 801 802 /* 803 * ACPI based hotplug CPU support 804 */ 805 #ifdef CONFIG_ACPI_HOTPLUG_CPU 806 static 807 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 808 { 809 #ifdef CONFIG_ACPI_NUMA 810 int pxm_id; 811 int nid; 812 813 pxm_id = acpi_get_pxm(handle); 814 /* 815 * We don't have cpu-only-node hotadd. But if the system equips 816 * SRAT table, pxm is already found and node is ready. 817 * So, just pxm_to_nid(pxm) is OK. 818 * This code here is for the system which doesn't have full SRAT 819 * table for possible cpus. 820 */ 821 nid = acpi_map_pxm_to_node(pxm_id); 822 node_cpuid[cpu].phys_id = physid; 823 node_cpuid[cpu].nid = nid; 824 #endif 825 return (0); 826 } 827 828 int additional_cpus __initdata = -1; 829 830 static __init int setup_additional_cpus(char *s) 831 { 832 if (s) 833 additional_cpus = simple_strtol(s, NULL, 0); 834 835 return 0; 836 } 837 838 early_param("additional_cpus", setup_additional_cpus); 839 840 /* 841 * cpu_possible_map should be static, it cannot change as CPUs 842 * are onlined, or offlined. The reason is per-cpu data-structures 843 * are allocated by some modules at init time, and dont expect to 844 * do this dynamically on cpu arrival/departure. 845 * cpu_present_map on the other hand can change dynamically. 846 * In case when cpu_hotplug is not compiled, then we resort to current 847 * behaviour, which is cpu_possible == cpu_present. 848 * - Ashok Raj 849 * 850 * Three ways to find out the number of additional hotplug CPUs: 851 * - If the BIOS specified disabled CPUs in ACPI/mptables use that. 852 * - The user can overwrite it with additional_cpus=NUM 853 * - Otherwise don't reserve additional CPUs. 854 */ 855 __init void prefill_possible_map(void) 856 { 857 int i; 858 int possible, disabled_cpus; 859 860 disabled_cpus = total_cpus - available_cpus; 861 862 if (additional_cpus == -1) { 863 if (disabled_cpus > 0) 864 additional_cpus = disabled_cpus; 865 else 866 additional_cpus = 0; 867 } 868 869 possible = available_cpus + additional_cpus; 870 871 if (possible > nr_cpu_ids) 872 possible = nr_cpu_ids; 873 874 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n", 875 possible, max((possible - available_cpus), 0)); 876 877 for (i = 0; i < possible; i++) 878 set_cpu_possible(i, true); 879 } 880 881 int acpi_map_lsapic(acpi_handle handle, int *pcpu) 882 { 883 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 884 union acpi_object *obj; 885 struct acpi_madt_local_sapic *lsapic; 886 cpumask_t tmp_map; 887 int cpu, physid; 888 889 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 890 return -EINVAL; 891 892 if (!buffer.length || !buffer.pointer) 893 return -EINVAL; 894 895 obj = buffer.pointer; 896 if (obj->type != ACPI_TYPE_BUFFER) 897 { 898 kfree(buffer.pointer); 899 return -EINVAL; 900 } 901 902 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer; 903 904 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) || 905 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) { 906 kfree(buffer.pointer); 907 return -EINVAL; 908 } 909 910 physid = ((lsapic->id << 8) | (lsapic->eid)); 911 912 kfree(buffer.pointer); 913 buffer.length = ACPI_ALLOCATE_BUFFER; 914 buffer.pointer = NULL; 915 916 cpumask_complement(&tmp_map, cpu_present_mask); 917 cpu = cpumask_first(&tmp_map); 918 if (cpu >= nr_cpu_ids) 919 return -EINVAL; 920 921 acpi_map_cpu2node(handle, cpu, physid); 922 923 cpu_set(cpu, cpu_present_map); 924 ia64_cpu_to_sapicid[cpu] = physid; 925 926 acpi_processor_set_pdc(handle); 927 928 *pcpu = cpu; 929 return (0); 930 } 931 932 EXPORT_SYMBOL(acpi_map_lsapic); 933 934 int acpi_unmap_lsapic(int cpu) 935 { 936 ia64_cpu_to_sapicid[cpu] = -1; 937 cpu_clear(cpu, cpu_present_map); 938 939 #ifdef CONFIG_ACPI_NUMA 940 /* NUMA specific cleanup's */ 941 #endif 942 943 return (0); 944 } 945 946 EXPORT_SYMBOL(acpi_unmap_lsapic); 947 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 948 949 #ifdef CONFIG_ACPI_NUMA 950 static acpi_status __devinit 951 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret) 952 { 953 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 954 union acpi_object *obj; 955 struct acpi_madt_io_sapic *iosapic; 956 unsigned int gsi_base; 957 int pxm, node; 958 959 /* Only care about objects w/ a method that returns the MADT */ 960 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 961 return AE_OK; 962 963 if (!buffer.length || !buffer.pointer) 964 return AE_OK; 965 966 obj = buffer.pointer; 967 if (obj->type != ACPI_TYPE_BUFFER || 968 obj->buffer.length < sizeof(*iosapic)) { 969 kfree(buffer.pointer); 970 return AE_OK; 971 } 972 973 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer; 974 975 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) { 976 kfree(buffer.pointer); 977 return AE_OK; 978 } 979 980 gsi_base = iosapic->global_irq_base; 981 982 kfree(buffer.pointer); 983 984 /* 985 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell 986 * us which node to associate this with. 987 */ 988 pxm = acpi_get_pxm(handle); 989 if (pxm < 0) 990 return AE_OK; 991 992 node = pxm_to_node(pxm); 993 994 if (node >= MAX_NUMNODES || !node_online(node) || 995 cpumask_empty(cpumask_of_node(node))) 996 return AE_OK; 997 998 /* We know a gsi to node mapping! */ 999 map_iosapic_to_node(gsi_base, node); 1000 return AE_OK; 1001 } 1002 1003 static int __init 1004 acpi_map_iosapics (void) 1005 { 1006 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL); 1007 return 0; 1008 } 1009 1010 fs_initcall(acpi_map_iosapics); 1011 #endif /* CONFIG_ACPI_NUMA */ 1012 1013 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 1014 { 1015 int err; 1016 1017 if ((err = iosapic_init(phys_addr, gsi_base))) 1018 return err; 1019 1020 #ifdef CONFIG_ACPI_NUMA 1021 acpi_map_iosapic(handle, 0, NULL, NULL); 1022 #endif /* CONFIG_ACPI_NUMA */ 1023 1024 return 0; 1025 } 1026 1027 EXPORT_SYMBOL(acpi_register_ioapic); 1028 1029 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 1030 { 1031 return iosapic_remove(gsi_base); 1032 } 1033 1034 EXPORT_SYMBOL(acpi_unregister_ioapic); 1035 1036 /* 1037 * acpi_save_state_mem() - save kernel state 1038 * 1039 * TBD when when IA64 starts to support suspend... 1040 */ 1041 int acpi_save_state_mem(void) { return 0; } 1042 1043 /* 1044 * acpi_restore_state() 1045 */ 1046 void acpi_restore_state_mem(void) {} 1047 1048 /* 1049 * do_suspend_lowlevel() 1050 */ 1051 void do_suspend_lowlevel(void) {} 1052