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(struct device *dev, 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(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, 682 ACPI_ACTIVE_LOW); 683 return 0; 684 } 685 686 int __init early_acpi_boot_init(void) 687 { 688 int ret; 689 690 /* 691 * do a partial walk of MADT to determine how many CPUs 692 * we have including offline CPUs 693 */ 694 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 695 printk(KERN_ERR PREFIX "Can't find MADT\n"); 696 return 0; 697 } 698 699 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 700 acpi_parse_lsapic, NR_CPUS); 701 if (ret < 1) 702 printk(KERN_ERR PREFIX 703 "Error parsing MADT - no LAPIC entries\n"); 704 705 return 0; 706 } 707 708 709 710 int __init acpi_boot_init(void) 711 { 712 713 /* 714 * MADT 715 * ---- 716 * Parse the Multiple APIC Description Table (MADT), if exists. 717 * Note that this table provides platform SMP configuration 718 * information -- the successor to MPS tables. 719 */ 720 721 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 722 printk(KERN_ERR PREFIX "Can't find MADT\n"); 723 goto skip_madt; 724 } 725 726 /* Local APIC */ 727 728 if (acpi_table_parse_madt 729 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0) 730 printk(KERN_ERR PREFIX 731 "Error parsing LAPIC address override entry\n"); 732 733 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0) 734 < 0) 735 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 736 737 /* I/O APIC */ 738 739 if (acpi_table_parse_madt 740 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) { 741 if (!ia64_platform_is("sn2")) 742 printk(KERN_ERR PREFIX 743 "Error parsing MADT - no IOSAPIC entries\n"); 744 } 745 746 /* System-Level Interrupt Routing */ 747 748 if (acpi_table_parse_madt 749 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src, 750 ACPI_MAX_PLATFORM_INTERRUPTS) < 0) 751 printk(KERN_ERR PREFIX 752 "Error parsing platform interrupt source entry\n"); 753 754 if (acpi_table_parse_madt 755 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0) 756 printk(KERN_ERR PREFIX 757 "Error parsing interrupt source overrides entry\n"); 758 759 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0) 760 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 761 skip_madt: 762 763 /* 764 * FADT says whether a legacy keyboard controller is present. 765 * The FADT also contains an SCI_INT line, by which the system 766 * gets interrupts such as power and sleep buttons. If it's not 767 * on a Legacy interrupt, it needs to be setup. 768 */ 769 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt)) 770 printk(KERN_ERR PREFIX "Can't find FADT\n"); 771 772 #ifdef CONFIG_SMP 773 if (available_cpus == 0) { 774 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n"); 775 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id()); 776 smp_boot_data.cpu_phys_id[available_cpus] = 777 hard_smp_processor_id(); 778 available_cpus = 1; /* We've got at least one of these, no? */ 779 } 780 smp_boot_data.cpu_count = available_cpus; 781 782 smp_build_cpu_map(); 783 # ifdef CONFIG_ACPI_NUMA 784 if (srat_num_cpus == 0) { 785 int cpu, i = 1; 786 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++) 787 if (smp_boot_data.cpu_phys_id[cpu] != 788 hard_smp_processor_id()) 789 node_cpuid[i++].phys_id = 790 smp_boot_data.cpu_phys_id[cpu]; 791 } 792 # endif 793 #endif 794 #ifdef CONFIG_ACPI_NUMA 795 build_cpu_to_node_map(); 796 #endif 797 /* Make boot-up look pretty */ 798 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, 799 total_cpus); 800 return 0; 801 } 802 803 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 804 { 805 int tmp; 806 807 if (has_8259 && gsi < 16) 808 *irq = isa_irq_to_vector(gsi); 809 else { 810 tmp = gsi_to_irq(gsi); 811 if (tmp == -1) 812 return -1; 813 *irq = tmp; 814 } 815 return 0; 816 } 817 818 /* 819 * ACPI based hotplug CPU support 820 */ 821 #ifdef CONFIG_ACPI_HOTPLUG_CPU 822 static 823 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 824 { 825 #ifdef CONFIG_ACPI_NUMA 826 int pxm_id; 827 int nid; 828 829 pxm_id = acpi_get_pxm(handle); 830 /* 831 * We don't have cpu-only-node hotadd. But if the system equips 832 * SRAT table, pxm is already found and node is ready. 833 * So, just pxm_to_nid(pxm) is OK. 834 * This code here is for the system which doesn't have full SRAT 835 * table for possible cpus. 836 */ 837 nid = acpi_map_pxm_to_node(pxm_id); 838 node_cpuid[cpu].phys_id = physid; 839 node_cpuid[cpu].nid = nid; 840 #endif 841 return (0); 842 } 843 844 int additional_cpus __initdata = -1; 845 846 static __init int setup_additional_cpus(char *s) 847 { 848 if (s) 849 additional_cpus = simple_strtol(s, NULL, 0); 850 851 return 0; 852 } 853 854 early_param("additional_cpus", setup_additional_cpus); 855 856 /* 857 * cpu_possible_map should be static, it cannot change as CPUs 858 * are onlined, or offlined. The reason is per-cpu data-structures 859 * are allocated by some modules at init time, and dont expect to 860 * do this dynamically on cpu arrival/departure. 861 * cpu_present_map on the other hand can change dynamically. 862 * In case when cpu_hotplug is not compiled, then we resort to current 863 * behaviour, which is cpu_possible == cpu_present. 864 * - Ashok Raj 865 * 866 * Three ways to find out the number of additional hotplug CPUs: 867 * - If the BIOS specified disabled CPUs in ACPI/mptables use that. 868 * - The user can overwrite it with additional_cpus=NUM 869 * - Otherwise don't reserve additional CPUs. 870 */ 871 __init void prefill_possible_map(void) 872 { 873 int i; 874 int possible, disabled_cpus; 875 876 disabled_cpus = total_cpus - available_cpus; 877 878 if (additional_cpus == -1) { 879 if (disabled_cpus > 0) 880 additional_cpus = disabled_cpus; 881 else 882 additional_cpus = 0; 883 } 884 885 possible = available_cpus + additional_cpus; 886 887 if (possible > NR_CPUS) 888 possible = NR_CPUS; 889 890 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n", 891 possible, max((possible - available_cpus), 0)); 892 893 for (i = 0; i < possible; i++) 894 set_cpu_possible(i, true); 895 } 896 897 int acpi_map_lsapic(acpi_handle handle, int *pcpu) 898 { 899 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 900 union acpi_object *obj; 901 struct acpi_madt_local_sapic *lsapic; 902 cpumask_t tmp_map; 903 int cpu, physid; 904 905 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 906 return -EINVAL; 907 908 if (!buffer.length || !buffer.pointer) 909 return -EINVAL; 910 911 obj = buffer.pointer; 912 if (obj->type != ACPI_TYPE_BUFFER) 913 { 914 kfree(buffer.pointer); 915 return -EINVAL; 916 } 917 918 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer; 919 920 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) || 921 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) { 922 kfree(buffer.pointer); 923 return -EINVAL; 924 } 925 926 physid = ((lsapic->id << 8) | (lsapic->eid)); 927 928 kfree(buffer.pointer); 929 buffer.length = ACPI_ALLOCATE_BUFFER; 930 buffer.pointer = NULL; 931 932 cpumask_complement(&tmp_map, cpu_present_mask); 933 cpu = cpumask_first(&tmp_map); 934 if (cpu >= nr_cpu_ids) 935 return -EINVAL; 936 937 acpi_map_cpu2node(handle, cpu, physid); 938 939 cpu_set(cpu, cpu_present_map); 940 ia64_cpu_to_sapicid[cpu] = physid; 941 942 *pcpu = cpu; 943 return (0); 944 } 945 946 EXPORT_SYMBOL(acpi_map_lsapic); 947 948 int acpi_unmap_lsapic(int cpu) 949 { 950 ia64_cpu_to_sapicid[cpu] = -1; 951 cpu_clear(cpu, cpu_present_map); 952 953 #ifdef CONFIG_ACPI_NUMA 954 /* NUMA specific cleanup's */ 955 #endif 956 957 return (0); 958 } 959 960 EXPORT_SYMBOL(acpi_unmap_lsapic); 961 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 962 963 #ifdef CONFIG_ACPI_NUMA 964 static acpi_status __devinit 965 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret) 966 { 967 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 968 union acpi_object *obj; 969 struct acpi_madt_io_sapic *iosapic; 970 unsigned int gsi_base; 971 int pxm, node; 972 973 /* Only care about objects w/ a method that returns the MADT */ 974 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 975 return AE_OK; 976 977 if (!buffer.length || !buffer.pointer) 978 return AE_OK; 979 980 obj = buffer.pointer; 981 if (obj->type != ACPI_TYPE_BUFFER || 982 obj->buffer.length < sizeof(*iosapic)) { 983 kfree(buffer.pointer); 984 return AE_OK; 985 } 986 987 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer; 988 989 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) { 990 kfree(buffer.pointer); 991 return AE_OK; 992 } 993 994 gsi_base = iosapic->global_irq_base; 995 996 kfree(buffer.pointer); 997 998 /* 999 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell 1000 * us which node to associate this with. 1001 */ 1002 pxm = acpi_get_pxm(handle); 1003 if (pxm < 0) 1004 return AE_OK; 1005 1006 node = pxm_to_node(pxm); 1007 1008 if (node >= MAX_NUMNODES || !node_online(node) || 1009 cpumask_empty(cpumask_of_node(node))) 1010 return AE_OK; 1011 1012 /* We know a gsi to node mapping! */ 1013 map_iosapic_to_node(gsi_base, node); 1014 return AE_OK; 1015 } 1016 1017 static int __init 1018 acpi_map_iosapics (void) 1019 { 1020 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL); 1021 return 0; 1022 } 1023 1024 fs_initcall(acpi_map_iosapics); 1025 #endif /* CONFIG_ACPI_NUMA */ 1026 1027 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 1028 { 1029 int err; 1030 1031 if ((err = iosapic_init(phys_addr, gsi_base))) 1032 return err; 1033 1034 #ifdef CONFIG_ACPI_NUMA 1035 acpi_map_iosapic(handle, 0, NULL, NULL); 1036 #endif /* CONFIG_ACPI_NUMA */ 1037 1038 return 0; 1039 } 1040 1041 EXPORT_SYMBOL(acpi_register_ioapic); 1042 1043 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 1044 { 1045 return iosapic_remove(gsi_base); 1046 } 1047 1048 EXPORT_SYMBOL(acpi_unregister_ioapic); 1049 1050 /* 1051 * acpi_save_state_mem() - save kernel state 1052 * 1053 * TBD when when IA64 starts to support suspend... 1054 */ 1055 int acpi_save_state_mem(void) { return 0; } 1056 1057 /* 1058 * acpi_restore_state() 1059 */ 1060 void acpi_restore_state_mem(void) {} 1061 1062 /* 1063 * do_suspend_lowlevel() 1064 */ 1065 void do_suspend_lowlevel(void) {} 1066 1067 #endif /* CONFIG_ACPI */ 1068