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