1 /* 2 * acpi.c - Architecture-Specific Low-Level ACPI Support 3 * 4 * Copyright (C) 1999 VA Linux Systems 5 * Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com> 6 * Copyright (C) 2000, 2002-2003 Hewlett-Packard Co. 7 * David Mosberger-Tang <davidm@hpl.hp.com> 8 * Copyright (C) 2000 Intel Corp. 9 * Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com> 10 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 11 * Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com> 12 * Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com> 13 * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de> 14 * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com> 15 * 16 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 17 * 18 * This program is free software; you can redistribute it and/or modify 19 * it under the terms of the GNU General Public License as published by 20 * the Free Software Foundation; either version 2 of the License, or 21 * (at your option) any later version. 22 * 23 * This program is distributed in the hope that it will be useful, 24 * but WITHOUT ANY WARRANTY; without even the implied warranty of 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 26 * GNU General Public License for more details. 27 * 28 * You should have received a copy of the GNU General Public License 29 * along with this program; if not, write to the Free Software 30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 31 * 32 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 33 */ 34 35 #include <linux/module.h> 36 #include <linux/init.h> 37 #include <linux/kernel.h> 38 #include <linux/sched.h> 39 #include <linux/smp.h> 40 #include <linux/string.h> 41 #include <linux/types.h> 42 #include <linux/irq.h> 43 #include <linux/acpi.h> 44 #include <linux/efi.h> 45 #include <linux/mmzone.h> 46 #include <linux/nodemask.h> 47 #include <asm/io.h> 48 #include <asm/iosapic.h> 49 #include <asm/machvec.h> 50 #include <asm/page.h> 51 #include <asm/system.h> 52 #include <asm/numa.h> 53 #include <asm/sal.h> 54 #include <asm/cyclone.h> 55 #include <asm/xen/hypervisor.h> 56 57 #define BAD_MADT_ENTRY(entry, end) ( \ 58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 60 61 #define PREFIX "ACPI: " 62 63 void (*pm_idle) (void); 64 EXPORT_SYMBOL(pm_idle); 65 void (*pm_power_off) (void); 66 EXPORT_SYMBOL(pm_power_off); 67 68 u32 acpi_rsdt_forced; 69 unsigned int acpi_cpei_override; 70 unsigned int acpi_cpei_phys_cpuid; 71 72 unsigned long acpi_wakeup_address = 0; 73 74 #ifdef CONFIG_IA64_GENERIC 75 static unsigned long __init acpi_find_rsdp(void) 76 { 77 unsigned long rsdp_phys = 0; 78 79 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) 80 rsdp_phys = efi.acpi20; 81 else if (efi.acpi != EFI_INVALID_TABLE_ADDR) 82 printk(KERN_WARNING PREFIX 83 "v1.0/r0.71 tables no longer supported\n"); 84 return rsdp_phys; 85 } 86 #endif 87 88 const char __init * 89 acpi_get_sysname(void) 90 { 91 #ifdef CONFIG_IA64_GENERIC 92 unsigned long rsdp_phys; 93 struct acpi_table_rsdp *rsdp; 94 struct acpi_table_xsdt *xsdt; 95 struct acpi_table_header *hdr; 96 #ifdef CONFIG_DMAR 97 u64 i, nentries; 98 #endif 99 100 rsdp_phys = acpi_find_rsdp(); 101 if (!rsdp_phys) { 102 printk(KERN_ERR 103 "ACPI 2.0 RSDP not found, default to \"dig\"\n"); 104 return "dig"; 105 } 106 107 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys); 108 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) { 109 printk(KERN_ERR 110 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n"); 111 return "dig"; 112 } 113 114 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address); 115 hdr = &xsdt->header; 116 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) { 117 printk(KERN_ERR 118 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n"); 119 return "dig"; 120 } 121 122 if (!strcmp(hdr->oem_id, "HP")) { 123 return "hpzx1"; 124 } else if (!strcmp(hdr->oem_id, "SGI")) { 125 if (!strcmp(hdr->oem_table_id + 4, "UV")) 126 return "uv"; 127 else 128 return "sn2"; 129 } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) { 130 return "xen"; 131 } 132 133 #ifdef CONFIG_DMAR 134 /* Look for Intel IOMMU */ 135 nentries = (hdr->length - sizeof(*hdr)) / 136 sizeof(xsdt->table_offset_entry[0]); 137 for (i = 0; i < nentries; i++) { 138 hdr = __va(xsdt->table_offset_entry[i]); 139 if (strncmp(hdr->signature, ACPI_SIG_DMAR, 140 sizeof(ACPI_SIG_DMAR) - 1) == 0) 141 return "dig_vtd"; 142 } 143 #endif 144 145 return "dig"; 146 #else 147 # if defined (CONFIG_IA64_HP_SIM) 148 return "hpsim"; 149 # elif defined (CONFIG_IA64_HP_ZX1) 150 return "hpzx1"; 151 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB) 152 return "hpzx1_swiotlb"; 153 # elif defined (CONFIG_IA64_SGI_SN2) 154 return "sn2"; 155 # elif defined (CONFIG_IA64_SGI_UV) 156 return "uv"; 157 # elif defined (CONFIG_IA64_DIG) 158 return "dig"; 159 # elif defined (CONFIG_IA64_XEN_GUEST) 160 return "xen"; 161 # elif defined(CONFIG_IA64_DIG_VTD) 162 return "dig_vtd"; 163 # else 164 # error Unknown platform. Fix acpi.c. 165 # endif 166 #endif 167 } 168 169 #ifdef CONFIG_ACPI 170 171 #define ACPI_MAX_PLATFORM_INTERRUPTS 256 172 173 /* Array to record platform interrupt vectors for generic interrupt routing. */ 174 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = { 175 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1 176 }; 177 178 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC; 179 180 /* 181 * Interrupt routing API for device drivers. Provides interrupt vector for 182 * a generic platform event. Currently only CPEI is implemented. 183 */ 184 int acpi_request_vector(u32 int_type) 185 { 186 int vector = -1; 187 188 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) { 189 /* corrected platform error interrupt */ 190 vector = platform_intr_list[int_type]; 191 } else 192 printk(KERN_ERR 193 "acpi_request_vector(): invalid interrupt type\n"); 194 return vector; 195 } 196 197 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size) 198 { 199 return __va(phys_addr); 200 } 201 202 void __init __acpi_unmap_table(char *map, unsigned long size) 203 { 204 } 205 206 /* -------------------------------------------------------------------------- 207 Boot-time Table Parsing 208 -------------------------------------------------------------------------- */ 209 210 static int available_cpus __initdata; 211 struct acpi_table_madt *acpi_madt __initdata; 212 static u8 has_8259; 213 214 static int __init 215 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 216 const unsigned long end) 217 { 218 struct acpi_madt_local_apic_override *lapic; 219 220 lapic = (struct acpi_madt_local_apic_override *)header; 221 222 if (BAD_MADT_ENTRY(lapic, end)) 223 return -EINVAL; 224 225 if (lapic->address) { 226 iounmap(ipi_base_addr); 227 ipi_base_addr = ioremap(lapic->address, 0); 228 } 229 return 0; 230 } 231 232 static int __init 233 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end) 234 { 235 struct acpi_madt_local_sapic *lsapic; 236 237 lsapic = (struct acpi_madt_local_sapic *)header; 238 239 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */ 240 241 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { 242 #ifdef CONFIG_SMP 243 smp_boot_data.cpu_phys_id[available_cpus] = 244 (lsapic->id << 8) | lsapic->eid; 245 #endif 246 ++available_cpus; 247 } 248 249 total_cpus++; 250 return 0; 251 } 252 253 static int __init 254 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 255 { 256 struct acpi_madt_local_apic_nmi *lacpi_nmi; 257 258 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header; 259 260 if (BAD_MADT_ENTRY(lacpi_nmi, end)) 261 return -EINVAL; 262 263 /* TBD: Support lapic_nmi entries */ 264 return 0; 265 } 266 267 static int __init 268 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end) 269 { 270 struct acpi_madt_io_sapic *iosapic; 271 272 iosapic = (struct acpi_madt_io_sapic *)header; 273 274 if (BAD_MADT_ENTRY(iosapic, end)) 275 return -EINVAL; 276 277 return iosapic_init(iosapic->address, iosapic->global_irq_base); 278 } 279 280 static unsigned int __initdata acpi_madt_rev; 281 282 static int __init 283 acpi_parse_plat_int_src(struct acpi_subtable_header * header, 284 const unsigned long end) 285 { 286 struct acpi_madt_interrupt_source *plintsrc; 287 int vector; 288 289 plintsrc = (struct acpi_madt_interrupt_source *)header; 290 291 if (BAD_MADT_ENTRY(plintsrc, end)) 292 return -EINVAL; 293 294 /* 295 * Get vector assignment for this interrupt, set attributes, 296 * and program the IOSAPIC routing table. 297 */ 298 vector = iosapic_register_platform_intr(plintsrc->type, 299 plintsrc->global_irq, 300 plintsrc->io_sapic_vector, 301 plintsrc->eid, 302 plintsrc->id, 303 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) == 304 ACPI_MADT_POLARITY_ACTIVE_HIGH) ? 305 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, 306 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) == 307 ACPI_MADT_TRIGGER_EDGE) ? 308 IOSAPIC_EDGE : IOSAPIC_LEVEL); 309 310 platform_intr_list[plintsrc->type] = vector; 311 if (acpi_madt_rev > 1) { 312 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE; 313 } 314 315 /* 316 * Save the physical id, so we can check when its being removed 317 */ 318 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff; 319 320 return 0; 321 } 322 323 #ifdef CONFIG_HOTPLUG_CPU 324 unsigned int can_cpei_retarget(void) 325 { 326 extern int cpe_vector; 327 extern unsigned int force_cpei_retarget; 328 329 /* 330 * Only if CPEI is supported and the override flag 331 * is present, otherwise return that its re-targettable 332 * if we are in polling mode. 333 */ 334 if (cpe_vector > 0) { 335 if (acpi_cpei_override || force_cpei_retarget) 336 return 1; 337 else 338 return 0; 339 } 340 return 1; 341 } 342 343 unsigned int is_cpu_cpei_target(unsigned int cpu) 344 { 345 unsigned int logical_id; 346 347 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid); 348 349 if (logical_id == cpu) 350 return 1; 351 else 352 return 0; 353 } 354 355 void set_cpei_target_cpu(unsigned int cpu) 356 { 357 acpi_cpei_phys_cpuid = cpu_physical_id(cpu); 358 } 359 #endif 360 361 unsigned int get_cpei_target_cpu(void) 362 { 363 return acpi_cpei_phys_cpuid; 364 } 365 366 static int __init 367 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 368 const unsigned long end) 369 { 370 struct acpi_madt_interrupt_override *p; 371 372 p = (struct acpi_madt_interrupt_override *)header; 373 374 if (BAD_MADT_ENTRY(p, end)) 375 return -EINVAL; 376 377 iosapic_override_isa_irq(p->source_irq, p->global_irq, 378 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) == 379 ACPI_MADT_POLARITY_ACTIVE_HIGH) ? 380 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, 381 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) == 382 ACPI_MADT_TRIGGER_EDGE) ? 383 IOSAPIC_EDGE : IOSAPIC_LEVEL); 384 return 0; 385 } 386 387 static int __init 388 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 389 { 390 struct acpi_madt_nmi_source *nmi_src; 391 392 nmi_src = (struct acpi_madt_nmi_source *)header; 393 394 if (BAD_MADT_ENTRY(nmi_src, end)) 395 return -EINVAL; 396 397 /* TBD: Support nimsrc entries */ 398 return 0; 399 } 400 401 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) 402 { 403 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) { 404 405 /* 406 * Unfortunately ITC_DRIFT is not yet part of the 407 * official SAL spec, so the ITC_DRIFT bit is not 408 * set by the BIOS on this hardware. 409 */ 410 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT; 411 412 cyclone_setup(); 413 } 414 } 415 416 static int __init acpi_parse_madt(struct acpi_table_header *table) 417 { 418 if (!table) 419 return -EINVAL; 420 421 acpi_madt = (struct acpi_table_madt *)table; 422 423 acpi_madt_rev = acpi_madt->header.revision; 424 425 /* remember the value for reference after free_initmem() */ 426 #ifdef CONFIG_ITANIUM 427 has_8259 = 1; /* Firmware on old Itanium systems is broken */ 428 #else 429 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT; 430 #endif 431 iosapic_system_init(has_8259); 432 433 /* Get base address of IPI Message Block */ 434 435 if (acpi_madt->address) 436 ipi_base_addr = ioremap(acpi_madt->address, 0); 437 438 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr); 439 440 acpi_madt_oem_check(acpi_madt->header.oem_id, 441 acpi_madt->header.oem_table_id); 442 443 return 0; 444 } 445 446 #ifdef CONFIG_ACPI_NUMA 447 448 #undef SLIT_DEBUG 449 450 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32) 451 452 static int __initdata srat_num_cpus; /* number of cpus */ 453 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN]; 454 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag)) 455 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag)) 456 static struct acpi_table_slit __initdata *slit_table; 457 cpumask_t early_cpu_possible_map = CPU_MASK_NONE; 458 459 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa) 460 { 461 int pxm; 462 463 pxm = pa->proximity_domain_lo; 464 if (ia64_platform_is("sn2")) 465 pxm += pa->proximity_domain_hi[0] << 8; 466 return pxm; 467 } 468 469 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma) 470 { 471 int pxm; 472 473 pxm = ma->proximity_domain; 474 if (!ia64_platform_is("sn2")) 475 pxm &= 0xff; 476 477 return pxm; 478 } 479 480 /* 481 * ACPI 2.0 SLIT (System Locality Information Table) 482 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf 483 */ 484 void __init acpi_numa_slit_init(struct acpi_table_slit *slit) 485 { 486 u32 len; 487 488 len = sizeof(struct acpi_table_header) + 8 489 + slit->locality_count * slit->locality_count; 490 if (slit->header.length != len) { 491 printk(KERN_ERR 492 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n", 493 len, slit->header.length); 494 return; 495 } 496 slit_table = slit; 497 } 498 499 void __init 500 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) 501 { 502 int pxm; 503 504 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED)) 505 return; 506 507 pxm = get_processor_proximity_domain(pa); 508 509 /* record this node in proximity bitmap */ 510 pxm_bit_set(pxm); 511 512 node_cpuid[srat_num_cpus].phys_id = 513 (pa->apic_id << 8) | (pa->local_sapic_eid); 514 /* nid should be overridden as logical node id later */ 515 node_cpuid[srat_num_cpus].nid = pxm; 516 cpu_set(srat_num_cpus, early_cpu_possible_map); 517 srat_num_cpus++; 518 } 519 520 void __init 521 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) 522 { 523 unsigned long paddr, size; 524 int pxm; 525 struct node_memblk_s *p, *q, *pend; 526 527 pxm = get_memory_proximity_domain(ma); 528 529 /* fill node memory chunk structure */ 530 paddr = ma->base_address; 531 size = ma->length; 532 533 /* Ignore disabled entries */ 534 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED)) 535 return; 536 537 /* record this node in proximity bitmap */ 538 pxm_bit_set(pxm); 539 540 /* Insertion sort based on base address */ 541 pend = &node_memblk[num_node_memblks]; 542 for (p = &node_memblk[0]; p < pend; p++) { 543 if (paddr < p->start_paddr) 544 break; 545 } 546 if (p < pend) { 547 for (q = pend - 1; q >= p; q--) 548 *(q + 1) = *q; 549 } 550 p->start_paddr = paddr; 551 p->size = size; 552 p->nid = pxm; 553 num_node_memblks++; 554 } 555 556 void __init acpi_numa_arch_fixup(void) 557 { 558 int i, j, node_from, node_to; 559 560 /* If there's no SRAT, fix the phys_id and mark node 0 online */ 561 if (srat_num_cpus == 0) { 562 node_set_online(0); 563 node_cpuid[0].phys_id = hard_smp_processor_id(); 564 return; 565 } 566 567 /* 568 * MCD - This can probably be dropped now. No need for pxm ID to node ID 569 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES. 570 */ 571 nodes_clear(node_online_map); 572 for (i = 0; i < MAX_PXM_DOMAINS; i++) { 573 if (pxm_bit_test(i)) { 574 int nid = acpi_map_pxm_to_node(i); 575 node_set_online(nid); 576 } 577 } 578 579 /* set logical node id in memory chunk structure */ 580 for (i = 0; i < num_node_memblks; i++) 581 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid); 582 583 /* assign memory bank numbers for each chunk on each node */ 584 for_each_online_node(i) { 585 int bank; 586 587 bank = 0; 588 for (j = 0; j < num_node_memblks; j++) 589 if (node_memblk[j].nid == i) 590 node_memblk[j].bank = bank++; 591 } 592 593 /* set logical node id in cpu structure */ 594 for_each_possible_early_cpu(i) 595 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid); 596 597 printk(KERN_INFO "Number of logical nodes in system = %d\n", 598 num_online_nodes()); 599 printk(KERN_INFO "Number of memory chunks in system = %d\n", 600 num_node_memblks); 601 602 if (!slit_table) { 603 for (i = 0; i < MAX_NUMNODES; i++) 604 for (j = 0; j < MAX_NUMNODES; j++) 605 node_distance(i, j) = i == j ? LOCAL_DISTANCE : 606 REMOTE_DISTANCE; 607 return; 608 } 609 610 memset(numa_slit, -1, sizeof(numa_slit)); 611 for (i = 0; i < slit_table->locality_count; i++) { 612 if (!pxm_bit_test(i)) 613 continue; 614 node_from = pxm_to_node(i); 615 for (j = 0; j < slit_table->locality_count; j++) { 616 if (!pxm_bit_test(j)) 617 continue; 618 node_to = pxm_to_node(j); 619 node_distance(node_from, node_to) = 620 slit_table->entry[i * slit_table->locality_count + j]; 621 } 622 } 623 624 #ifdef SLIT_DEBUG 625 printk("ACPI 2.0 SLIT locality table:\n"); 626 for_each_online_node(i) { 627 for_each_online_node(j) 628 printk("%03d ", node_distance(i, j)); 629 printk("\n"); 630 } 631 #endif 632 } 633 #endif /* CONFIG_ACPI_NUMA */ 634 635 /* 636 * success: return IRQ number (>=0) 637 * failure: return < 0 638 */ 639 int acpi_register_gsi(u32 gsi, int triggering, int polarity) 640 { 641 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) 642 return gsi; 643 644 if (has_8259 && gsi < 16) 645 return isa_irq_to_vector(gsi); 646 647 return iosapic_register_intr(gsi, 648 (polarity == 649 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : 650 IOSAPIC_POL_LOW, 651 (triggering == 652 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : 653 IOSAPIC_LEVEL); 654 } 655 656 void acpi_unregister_gsi(u32 gsi) 657 { 658 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) 659 return; 660 661 if (has_8259 && gsi < 16) 662 return; 663 664 iosapic_unregister_intr(gsi); 665 } 666 667 static int __init acpi_parse_fadt(struct acpi_table_header *table) 668 { 669 struct acpi_table_header *fadt_header; 670 struct acpi_table_fadt *fadt; 671 672 if (!table) 673 return -EINVAL; 674 675 fadt_header = (struct acpi_table_header *)table; 676 if (fadt_header->revision != 3) 677 return -ENODEV; /* Only deal with ACPI 2.0 FADT */ 678 679 fadt = (struct acpi_table_fadt *)fadt_header; 680 681 acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW); 682 return 0; 683 } 684 685 int __init early_acpi_boot_init(void) 686 { 687 int ret; 688 689 /* 690 * do a partial walk of MADT to determine how many CPUs 691 * we have including offline CPUs 692 */ 693 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 694 printk(KERN_ERR PREFIX "Can't find MADT\n"); 695 return 0; 696 } 697 698 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 699 acpi_parse_lsapic, NR_CPUS); 700 if (ret < 1) 701 printk(KERN_ERR PREFIX 702 "Error parsing MADT - no LAPIC entries\n"); 703 704 return 0; 705 } 706 707 708 709 int __init acpi_boot_init(void) 710 { 711 712 /* 713 * MADT 714 * ---- 715 * Parse the Multiple APIC Description Table (MADT), if exists. 716 * Note that this table provides platform SMP configuration 717 * information -- the successor to MPS tables. 718 */ 719 720 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 721 printk(KERN_ERR PREFIX "Can't find MADT\n"); 722 goto skip_madt; 723 } 724 725 /* Local APIC */ 726 727 if (acpi_table_parse_madt 728 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0) 729 printk(KERN_ERR PREFIX 730 "Error parsing LAPIC address override entry\n"); 731 732 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0) 733 < 0) 734 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 735 736 /* I/O APIC */ 737 738 if (acpi_table_parse_madt 739 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) { 740 if (!ia64_platform_is("sn2")) 741 printk(KERN_ERR PREFIX 742 "Error parsing MADT - no IOSAPIC entries\n"); 743 } 744 745 /* System-Level Interrupt Routing */ 746 747 if (acpi_table_parse_madt 748 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src, 749 ACPI_MAX_PLATFORM_INTERRUPTS) < 0) 750 printk(KERN_ERR PREFIX 751 "Error parsing platform interrupt source entry\n"); 752 753 if (acpi_table_parse_madt 754 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0) 755 printk(KERN_ERR PREFIX 756 "Error parsing interrupt source overrides entry\n"); 757 758 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0) 759 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 760 skip_madt: 761 762 /* 763 * FADT says whether a legacy keyboard controller is present. 764 * The FADT also contains an SCI_INT line, by which the system 765 * gets interrupts such as power and sleep buttons. If it's not 766 * on a Legacy interrupt, it needs to be setup. 767 */ 768 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt)) 769 printk(KERN_ERR PREFIX "Can't find FADT\n"); 770 771 #ifdef CONFIG_SMP 772 if (available_cpus == 0) { 773 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n"); 774 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id()); 775 smp_boot_data.cpu_phys_id[available_cpus] = 776 hard_smp_processor_id(); 777 available_cpus = 1; /* We've got at least one of these, no? */ 778 } 779 smp_boot_data.cpu_count = available_cpus; 780 781 smp_build_cpu_map(); 782 # ifdef CONFIG_ACPI_NUMA 783 if (srat_num_cpus == 0) { 784 int cpu, i = 1; 785 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++) 786 if (smp_boot_data.cpu_phys_id[cpu] != 787 hard_smp_processor_id()) 788 node_cpuid[i++].phys_id = 789 smp_boot_data.cpu_phys_id[cpu]; 790 } 791 # endif 792 #endif 793 #ifdef CONFIG_ACPI_NUMA 794 build_cpu_to_node_map(); 795 #endif 796 /* Make boot-up look pretty */ 797 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, 798 total_cpus); 799 return 0; 800 } 801 802 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 803 { 804 int tmp; 805 806 if (has_8259 && gsi < 16) 807 *irq = isa_irq_to_vector(gsi); 808 else { 809 tmp = gsi_to_irq(gsi); 810 if (tmp == -1) 811 return -1; 812 *irq = tmp; 813 } 814 return 0; 815 } 816 817 /* 818 * ACPI based hotplug CPU support 819 */ 820 #ifdef CONFIG_ACPI_HOTPLUG_CPU 821 static 822 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 823 { 824 #ifdef CONFIG_ACPI_NUMA 825 int pxm_id; 826 int nid; 827 828 pxm_id = acpi_get_pxm(handle); 829 /* 830 * We don't have cpu-only-node hotadd. But if the system equips 831 * SRAT table, pxm is already found and node is ready. 832 * So, just pxm_to_nid(pxm) is OK. 833 * This code here is for the system which doesn't have full SRAT 834 * table for possible cpus. 835 */ 836 nid = acpi_map_pxm_to_node(pxm_id); 837 node_cpuid[cpu].phys_id = physid; 838 node_cpuid[cpu].nid = nid; 839 #endif 840 return (0); 841 } 842 843 int additional_cpus __initdata = -1; 844 845 static __init int setup_additional_cpus(char *s) 846 { 847 if (s) 848 additional_cpus = simple_strtol(s, NULL, 0); 849 850 return 0; 851 } 852 853 early_param("additional_cpus", setup_additional_cpus); 854 855 /* 856 * cpu_possible_map should be static, it cannot change as CPUs 857 * are onlined, or offlined. The reason is per-cpu data-structures 858 * are allocated by some modules at init time, and dont expect to 859 * do this dynamically on cpu arrival/departure. 860 * cpu_present_map on the other hand can change dynamically. 861 * In case when cpu_hotplug is not compiled, then we resort to current 862 * behaviour, which is cpu_possible == cpu_present. 863 * - Ashok Raj 864 * 865 * Three ways to find out the number of additional hotplug CPUs: 866 * - If the BIOS specified disabled CPUs in ACPI/mptables use that. 867 * - The user can overwrite it with additional_cpus=NUM 868 * - Otherwise don't reserve additional CPUs. 869 */ 870 __init void prefill_possible_map(void) 871 { 872 int i; 873 int possible, disabled_cpus; 874 875 disabled_cpus = total_cpus - available_cpus; 876 877 if (additional_cpus == -1) { 878 if (disabled_cpus > 0) 879 additional_cpus = disabled_cpus; 880 else 881 additional_cpus = 0; 882 } 883 884 possible = available_cpus + additional_cpus; 885 886 if (possible > NR_CPUS) 887 possible = NR_CPUS; 888 889 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n", 890 possible, max((possible - available_cpus), 0)); 891 892 for (i = 0; i < possible; i++) 893 set_cpu_possible(i, true); 894 } 895 896 int acpi_map_lsapic(acpi_handle handle, int *pcpu) 897 { 898 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 899 union acpi_object *obj; 900 struct acpi_madt_local_sapic *lsapic; 901 cpumask_t tmp_map; 902 int cpu, physid; 903 904 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 905 return -EINVAL; 906 907 if (!buffer.length || !buffer.pointer) 908 return -EINVAL; 909 910 obj = buffer.pointer; 911 if (obj->type != ACPI_TYPE_BUFFER) 912 { 913 kfree(buffer.pointer); 914 return -EINVAL; 915 } 916 917 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer; 918 919 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) || 920 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) { 921 kfree(buffer.pointer); 922 return -EINVAL; 923 } 924 925 physid = ((lsapic->id << 8) | (lsapic->eid)); 926 927 kfree(buffer.pointer); 928 buffer.length = ACPI_ALLOCATE_BUFFER; 929 buffer.pointer = NULL; 930 931 cpumask_complement(&tmp_map, cpu_present_mask); 932 cpu = cpumask_first(&tmp_map); 933 if (cpu >= nr_cpu_ids) 934 return -EINVAL; 935 936 acpi_map_cpu2node(handle, cpu, physid); 937 938 cpu_set(cpu, cpu_present_map); 939 ia64_cpu_to_sapicid[cpu] = physid; 940 941 *pcpu = cpu; 942 return (0); 943 } 944 945 EXPORT_SYMBOL(acpi_map_lsapic); 946 947 int acpi_unmap_lsapic(int cpu) 948 { 949 ia64_cpu_to_sapicid[cpu] = -1; 950 cpu_clear(cpu, cpu_present_map); 951 952 #ifdef CONFIG_ACPI_NUMA 953 /* NUMA specific cleanup's */ 954 #endif 955 956 return (0); 957 } 958 959 EXPORT_SYMBOL(acpi_unmap_lsapic); 960 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 961 962 #ifdef CONFIG_ACPI_NUMA 963 static acpi_status __devinit 964 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret) 965 { 966 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 967 union acpi_object *obj; 968 struct acpi_madt_io_sapic *iosapic; 969 unsigned int gsi_base; 970 int pxm, node; 971 972 /* Only care about objects w/ a method that returns the MADT */ 973 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 974 return AE_OK; 975 976 if (!buffer.length || !buffer.pointer) 977 return AE_OK; 978 979 obj = buffer.pointer; 980 if (obj->type != ACPI_TYPE_BUFFER || 981 obj->buffer.length < sizeof(*iosapic)) { 982 kfree(buffer.pointer); 983 return AE_OK; 984 } 985 986 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer; 987 988 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) { 989 kfree(buffer.pointer); 990 return AE_OK; 991 } 992 993 gsi_base = iosapic->global_irq_base; 994 995 kfree(buffer.pointer); 996 997 /* 998 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell 999 * us which node to associate this with. 1000 */ 1001 pxm = acpi_get_pxm(handle); 1002 if (pxm < 0) 1003 return AE_OK; 1004 1005 node = pxm_to_node(pxm); 1006 1007 if (node >= MAX_NUMNODES || !node_online(node) || 1008 cpumask_empty(cpumask_of_node(node))) 1009 return AE_OK; 1010 1011 /* We know a gsi to node mapping! */ 1012 map_iosapic_to_node(gsi_base, node); 1013 return AE_OK; 1014 } 1015 1016 static int __init 1017 acpi_map_iosapics (void) 1018 { 1019 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL); 1020 return 0; 1021 } 1022 1023 fs_initcall(acpi_map_iosapics); 1024 #endif /* CONFIG_ACPI_NUMA */ 1025 1026 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 1027 { 1028 int err; 1029 1030 if ((err = iosapic_init(phys_addr, gsi_base))) 1031 return err; 1032 1033 #ifdef CONFIG_ACPI_NUMA 1034 acpi_map_iosapic(handle, 0, NULL, NULL); 1035 #endif /* CONFIG_ACPI_NUMA */ 1036 1037 return 0; 1038 } 1039 1040 EXPORT_SYMBOL(acpi_register_ioapic); 1041 1042 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 1043 { 1044 return iosapic_remove(gsi_base); 1045 } 1046 1047 EXPORT_SYMBOL(acpi_unregister_ioapic); 1048 1049 /* 1050 * acpi_save_state_mem() - save kernel state 1051 * 1052 * TBD when when IA64 starts to support suspend... 1053 */ 1054 int acpi_save_state_mem(void) { return 0; } 1055 1056 /* 1057 * acpi_restore_state() 1058 */ 1059 void acpi_restore_state_mem(void) {} 1060 1061 /* 1062 * do_suspend_lowlevel() 1063 */ 1064 void do_suspend_lowlevel(void) {} 1065 1066 #endif /* CONFIG_ACPI */ 1067