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