Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * boot.c - Architecture-Specific Low-Level ACPI Boot Support |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 5 | * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> |
| 6 | * |
| 7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 24 | */ |
| 25 | |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/acpi.h> |
| 28 | #include <linux/acpi_pmtmr.h> |
| 29 | #include <linux/efi.h> |
| 30 | #include <linux/cpumask.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/dmi.h> |
| 33 | #include <linux/irq.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/bootmem.h> |
| 36 | #include <linux/ioport.h> |
| 37 | #include <linux/pci.h> |
| 38 | |
| 39 | #include <asm/irqdomain.h> |
| 40 | #include <asm/pci_x86.h> |
| 41 | #include <asm/pgtable.h> |
| 42 | #include <asm/io_apic.h> |
| 43 | #include <asm/apic.h> |
| 44 | #include <asm/io.h> |
| 45 | #include <asm/mpspec.h> |
| 46 | #include <asm/smp.h> |
| 47 | #include <asm/i8259.h> |
| 48 | |
| 49 | #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ |
| 50 | static int __initdata acpi_force = 0; |
| 51 | int acpi_disabled; |
| 52 | EXPORT_SYMBOL(acpi_disabled); |
| 53 | |
| 54 | #ifdef CONFIG_X86_64 |
| 55 | # include <asm/proto.h> |
| 56 | #endif /* X86 */ |
| 57 | |
| 58 | #define PREFIX "ACPI: " |
| 59 | |
| 60 | int acpi_noirq; /* skip ACPI IRQ initialization */ |
| 61 | int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ |
| 62 | EXPORT_SYMBOL(acpi_pci_disabled); |
| 63 | |
| 64 | int acpi_lapic; |
| 65 | int acpi_ioapic; |
| 66 | int acpi_strict; |
| 67 | int acpi_disable_cmcff; |
| 68 | |
| 69 | u8 acpi_sci_flags __initdata; |
| 70 | int acpi_sci_override_gsi __initdata; |
| 71 | int acpi_skip_timer_override __initdata; |
| 72 | int acpi_use_timer_override __initdata; |
| 73 | int acpi_fix_pin2_polarity __initdata; |
| 74 | |
| 75 | #ifdef CONFIG_X86_LOCAL_APIC |
| 76 | static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; |
| 77 | #endif |
| 78 | |
| 79 | /* |
| 80 | * Locks related to IOAPIC hotplug |
| 81 | * Hotplug side: |
| 82 | * ->device_hotplug_lock |
| 83 | * ->acpi_ioapic_lock |
| 84 | * ->ioapic_lock |
| 85 | * Interrupt mapping side: |
| 86 | * ->acpi_ioapic_lock |
| 87 | * ->ioapic_mutex |
| 88 | * ->ioapic_lock |
| 89 | */ |
| 90 | static DEFINE_MUTEX(acpi_ioapic_lock); |
| 91 | |
| 92 | /* -------------------------------------------------------------------------- |
| 93 | Boot-time Configuration |
| 94 | -------------------------------------------------------------------------- */ |
| 95 | |
| 96 | /* |
| 97 | * The default interrupt routing model is PIC (8259). This gets |
| 98 | * overridden if IOAPICs are enumerated (below). |
| 99 | */ |
| 100 | enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; |
| 101 | |
| 102 | |
| 103 | /* |
| 104 | * ISA irqs by default are the first 16 gsis but can be |
| 105 | * any gsi as specified by an interrupt source override. |
| 106 | */ |
| 107 | static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { |
| 108 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 |
| 109 | }; |
| 110 | |
| 111 | #define ACPI_INVALID_GSI INT_MIN |
| 112 | |
| 113 | /* |
| 114 | * This is just a simple wrapper around early_ioremap(), |
| 115 | * with sanity checks for phys == 0 and size == 0. |
| 116 | */ |
| 117 | char *__init __acpi_map_table(unsigned long phys, unsigned long size) |
| 118 | { |
| 119 | |
| 120 | if (!phys || !size) |
| 121 | return NULL; |
| 122 | |
| 123 | return early_ioremap(phys, size); |
| 124 | } |
| 125 | |
| 126 | void __init __acpi_unmap_table(char *map, unsigned long size) |
| 127 | { |
| 128 | if (!map || !size) |
| 129 | return; |
| 130 | |
| 131 | early_iounmap(map, size); |
| 132 | } |
| 133 | |
| 134 | #ifdef CONFIG_X86_LOCAL_APIC |
| 135 | static int __init acpi_parse_madt(struct acpi_table_header *table) |
| 136 | { |
| 137 | struct acpi_table_madt *madt = NULL; |
| 138 | |
| 139 | if (!cpu_has_apic) |
| 140 | return -EINVAL; |
| 141 | |
| 142 | madt = (struct acpi_table_madt *)table; |
| 143 | if (!madt) { |
| 144 | printk(KERN_WARNING PREFIX "Unable to map MADT\n"); |
| 145 | return -ENODEV; |
| 146 | } |
| 147 | |
| 148 | if (madt->address) { |
| 149 | acpi_lapic_addr = (u64) madt->address; |
| 150 | |
| 151 | printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", |
| 152 | madt->address); |
| 153 | } |
| 154 | |
| 155 | default_acpi_madt_oem_check(madt->header.oem_id, |
| 156 | madt->header.oem_table_id); |
| 157 | |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * acpi_register_lapic - register a local apic and generates a logic cpu number |
| 163 | * @id: local apic id to register |
| 164 | * @enabled: this cpu is enabled or not |
| 165 | * |
| 166 | * Returns the logic cpu number which maps to the local apic |
| 167 | */ |
| 168 | static int acpi_register_lapic(int id, u8 enabled) |
| 169 | { |
| 170 | unsigned int ver = 0; |
| 171 | |
| 172 | if (id >= MAX_LOCAL_APIC) { |
| 173 | printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); |
| 174 | return -EINVAL; |
| 175 | } |
| 176 | |
| 177 | if (!enabled) { |
| 178 | ++disabled_cpus; |
| 179 | return -EINVAL; |
| 180 | } |
| 181 | |
| 182 | if (boot_cpu_physical_apicid != -1U) |
| 183 | ver = apic_version[boot_cpu_physical_apicid]; |
| 184 | |
| 185 | return generic_processor_info(id, ver); |
| 186 | } |
| 187 | |
| 188 | static int __init |
| 189 | acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) |
| 190 | { |
| 191 | struct acpi_madt_local_x2apic *processor = NULL; |
| 192 | int apic_id; |
| 193 | u8 enabled; |
| 194 | |
| 195 | processor = (struct acpi_madt_local_x2apic *)header; |
| 196 | |
| 197 | if (BAD_MADT_ENTRY(processor, end)) |
| 198 | return -EINVAL; |
| 199 | |
| 200 | acpi_table_print_madt_entry(header); |
| 201 | |
| 202 | apic_id = processor->local_apic_id; |
| 203 | enabled = processor->lapic_flags & ACPI_MADT_ENABLED; |
| 204 | #ifdef CONFIG_X86_X2APIC |
| 205 | /* |
| 206 | * We need to register disabled CPU as well to permit |
| 207 | * counting disabled CPUs. This allows us to size |
| 208 | * cpus_possible_map more accurately, to permit |
| 209 | * to not preallocating memory for all NR_CPUS |
| 210 | * when we use CPU hotplug. |
| 211 | */ |
| 212 | if (!apic->apic_id_valid(apic_id) && enabled) |
| 213 | printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); |
| 214 | else |
| 215 | acpi_register_lapic(apic_id, enabled); |
| 216 | #else |
| 217 | printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); |
| 218 | #endif |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static int __init |
| 224 | acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) |
| 225 | { |
| 226 | struct acpi_madt_local_apic *processor = NULL; |
| 227 | |
| 228 | processor = (struct acpi_madt_local_apic *)header; |
| 229 | |
| 230 | if (BAD_MADT_ENTRY(processor, end)) |
| 231 | return -EINVAL; |
| 232 | |
| 233 | acpi_table_print_madt_entry(header); |
| 234 | |
| 235 | /* |
| 236 | * We need to register disabled CPU as well to permit |
| 237 | * counting disabled CPUs. This allows us to size |
| 238 | * cpus_possible_map more accurately, to permit |
| 239 | * to not preallocating memory for all NR_CPUS |
| 240 | * when we use CPU hotplug. |
| 241 | */ |
| 242 | acpi_register_lapic(processor->id, /* APIC ID */ |
| 243 | processor->lapic_flags & ACPI_MADT_ENABLED); |
| 244 | |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | static int __init |
| 249 | acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) |
| 250 | { |
| 251 | struct acpi_madt_local_sapic *processor = NULL; |
| 252 | |
| 253 | processor = (struct acpi_madt_local_sapic *)header; |
| 254 | |
| 255 | if (BAD_MADT_ENTRY(processor, end)) |
| 256 | return -EINVAL; |
| 257 | |
| 258 | acpi_table_print_madt_entry(header); |
| 259 | |
| 260 | acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ |
| 261 | processor->lapic_flags & ACPI_MADT_ENABLED); |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | static int __init |
| 267 | acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, |
| 268 | const unsigned long end) |
| 269 | { |
| 270 | struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; |
| 271 | |
| 272 | lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; |
| 273 | |
| 274 | if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) |
| 275 | return -EINVAL; |
| 276 | |
| 277 | acpi_lapic_addr = lapic_addr_ovr->address; |
| 278 | |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | static int __init |
| 283 | acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, |
| 284 | const unsigned long end) |
| 285 | { |
| 286 | struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; |
| 287 | |
| 288 | x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; |
| 289 | |
| 290 | if (BAD_MADT_ENTRY(x2apic_nmi, end)) |
| 291 | return -EINVAL; |
| 292 | |
| 293 | acpi_table_print_madt_entry(header); |
| 294 | |
| 295 | if (x2apic_nmi->lint != 1) |
| 296 | printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); |
| 297 | |
| 298 | return 0; |
| 299 | } |
| 300 | |
| 301 | static int __init |
| 302 | acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) |
| 303 | { |
| 304 | struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; |
| 305 | |
| 306 | lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; |
| 307 | |
| 308 | if (BAD_MADT_ENTRY(lapic_nmi, end)) |
| 309 | return -EINVAL; |
| 310 | |
| 311 | acpi_table_print_madt_entry(header); |
| 312 | |
| 313 | if (lapic_nmi->lint != 1) |
| 314 | printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | #endif /*CONFIG_X86_LOCAL_APIC */ |
| 320 | |
| 321 | #ifdef CONFIG_X86_IO_APIC |
| 322 | #define MP_ISA_BUS 0 |
| 323 | |
| 324 | static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, |
| 325 | u32 gsi) |
| 326 | { |
| 327 | int ioapic; |
| 328 | int pin; |
| 329 | struct mpc_intsrc mp_irq; |
| 330 | |
| 331 | /* |
| 332 | * Check bus_irq boundary. |
| 333 | */ |
| 334 | if (bus_irq >= NR_IRQS_LEGACY) { |
| 335 | pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); |
| 336 | return; |
| 337 | } |
| 338 | |
| 339 | /* |
| 340 | * Convert 'gsi' to 'ioapic.pin'. |
| 341 | */ |
| 342 | ioapic = mp_find_ioapic(gsi); |
| 343 | if (ioapic < 0) |
| 344 | return; |
| 345 | pin = mp_find_ioapic_pin(ioapic, gsi); |
| 346 | |
| 347 | /* |
| 348 | * TBD: This check is for faulty timer entries, where the override |
| 349 | * erroneously sets the trigger to level, resulting in a HUGE |
| 350 | * increase of timer interrupts! |
| 351 | */ |
| 352 | if ((bus_irq == 0) && (trigger == 3)) |
| 353 | trigger = 1; |
| 354 | |
| 355 | mp_irq.type = MP_INTSRC; |
| 356 | mp_irq.irqtype = mp_INT; |
| 357 | mp_irq.irqflag = (trigger << 2) | polarity; |
| 358 | mp_irq.srcbus = MP_ISA_BUS; |
| 359 | mp_irq.srcbusirq = bus_irq; /* IRQ */ |
| 360 | mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ |
| 361 | mp_irq.dstirq = pin; /* INTIN# */ |
| 362 | |
| 363 | mp_save_irq(&mp_irq); |
| 364 | |
| 365 | /* |
| 366 | * Reset default identity mapping if gsi is also an legacy IRQ, |
| 367 | * otherwise there will be more than one entry with the same GSI |
| 368 | * and acpi_isa_irq_to_gsi() may give wrong result. |
| 369 | */ |
| 370 | if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) |
| 371 | isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; |
| 372 | isa_irq_to_gsi[bus_irq] = gsi; |
| 373 | } |
| 374 | |
| 375 | static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, |
| 376 | int polarity) |
| 377 | { |
| 378 | #ifdef CONFIG_X86_MPPARSE |
| 379 | struct mpc_intsrc mp_irq; |
| 380 | struct pci_dev *pdev; |
| 381 | unsigned char number; |
| 382 | unsigned int devfn; |
| 383 | int ioapic; |
| 384 | u8 pin; |
| 385 | |
| 386 | if (!acpi_ioapic) |
| 387 | return 0; |
| 388 | if (!dev || !dev_is_pci(dev)) |
| 389 | return 0; |
| 390 | |
| 391 | pdev = to_pci_dev(dev); |
| 392 | number = pdev->bus->number; |
| 393 | devfn = pdev->devfn; |
| 394 | pin = pdev->pin; |
| 395 | /* print the entry should happen on mptable identically */ |
| 396 | mp_irq.type = MP_INTSRC; |
| 397 | mp_irq.irqtype = mp_INT; |
| 398 | mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | |
| 399 | (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); |
| 400 | mp_irq.srcbus = number; |
| 401 | mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); |
| 402 | ioapic = mp_find_ioapic(gsi); |
| 403 | mp_irq.dstapic = mpc_ioapic_id(ioapic); |
| 404 | mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); |
| 405 | |
| 406 | mp_save_irq(&mp_irq); |
| 407 | #endif |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | static int __init |
| 412 | acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) |
| 413 | { |
| 414 | struct acpi_madt_io_apic *ioapic = NULL; |
| 415 | struct ioapic_domain_cfg cfg = { |
| 416 | .type = IOAPIC_DOMAIN_DYNAMIC, |
| 417 | .ops = &mp_ioapic_irqdomain_ops, |
| 418 | }; |
| 419 | |
| 420 | ioapic = (struct acpi_madt_io_apic *)header; |
| 421 | |
| 422 | if (BAD_MADT_ENTRY(ioapic, end)) |
| 423 | return -EINVAL; |
| 424 | |
| 425 | acpi_table_print_madt_entry(header); |
| 426 | |
| 427 | /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ |
| 428 | if (ioapic->global_irq_base < nr_legacy_irqs()) |
| 429 | cfg.type = IOAPIC_DOMAIN_LEGACY; |
| 430 | |
| 431 | mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, |
| 432 | &cfg); |
| 433 | |
| 434 | return 0; |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Parse Interrupt Source Override for the ACPI SCI |
| 439 | */ |
| 440 | static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) |
| 441 | { |
| 442 | if (trigger == 0) /* compatible SCI trigger is level */ |
| 443 | trigger = 3; |
| 444 | |
| 445 | if (polarity == 0) /* compatible SCI polarity is low */ |
| 446 | polarity = 3; |
| 447 | |
| 448 | /* Command-line over-ride via acpi_sci= */ |
| 449 | if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) |
| 450 | trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; |
| 451 | |
| 452 | if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) |
| 453 | polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; |
| 454 | |
| 455 | mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); |
| 456 | acpi_penalize_sci_irq(bus_irq, trigger, polarity); |
| 457 | |
| 458 | /* |
| 459 | * stash over-ride to indicate we've been here |
| 460 | * and for later update of acpi_gbl_FADT |
| 461 | */ |
| 462 | acpi_sci_override_gsi = gsi; |
| 463 | return; |
| 464 | } |
| 465 | |
| 466 | static int __init |
| 467 | acpi_parse_int_src_ovr(struct acpi_subtable_header * header, |
| 468 | const unsigned long end) |
| 469 | { |
| 470 | struct acpi_madt_interrupt_override *intsrc = NULL; |
| 471 | |
| 472 | intsrc = (struct acpi_madt_interrupt_override *)header; |
| 473 | |
| 474 | if (BAD_MADT_ENTRY(intsrc, end)) |
| 475 | return -EINVAL; |
| 476 | |
| 477 | acpi_table_print_madt_entry(header); |
| 478 | |
| 479 | if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { |
| 480 | acpi_sci_ioapic_setup(intsrc->source_irq, |
| 481 | intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, |
| 482 | (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, |
| 483 | intsrc->global_irq); |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | if (intsrc->source_irq == 0) { |
| 488 | if (acpi_skip_timer_override) { |
| 489 | printk(PREFIX "BIOS IRQ0 override ignored.\n"); |
| 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity |
| 494 | && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { |
| 495 | intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; |
| 496 | printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | mp_override_legacy_irq(intsrc->source_irq, |
| 501 | intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, |
| 502 | (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, |
| 503 | intsrc->global_irq); |
| 504 | |
| 505 | return 0; |
| 506 | } |
| 507 | |
| 508 | static int __init |
| 509 | acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) |
| 510 | { |
| 511 | struct acpi_madt_nmi_source *nmi_src = NULL; |
| 512 | |
| 513 | nmi_src = (struct acpi_madt_nmi_source *)header; |
| 514 | |
| 515 | if (BAD_MADT_ENTRY(nmi_src, end)) |
| 516 | return -EINVAL; |
| 517 | |
| 518 | acpi_table_print_madt_entry(header); |
| 519 | |
| 520 | /* TBD: Support nimsrc entries? */ |
| 521 | |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | #endif /* CONFIG_X86_IO_APIC */ |
| 526 | |
| 527 | /* |
| 528 | * acpi_pic_sci_set_trigger() |
| 529 | * |
| 530 | * use ELCR to set PIC-mode trigger type for SCI |
| 531 | * |
| 532 | * If a PIC-mode SCI is not recognized or gives spurious IRQ7's |
| 533 | * it may require Edge Trigger -- use "acpi_sci=edge" |
| 534 | * |
| 535 | * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers |
| 536 | * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. |
| 537 | * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) |
| 538 | * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) |
| 539 | */ |
| 540 | |
| 541 | void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) |
| 542 | { |
| 543 | unsigned int mask = 1 << irq; |
| 544 | unsigned int old, new; |
| 545 | |
| 546 | /* Real old ELCR mask */ |
| 547 | old = inb(0x4d0) | (inb(0x4d1) << 8); |
| 548 | |
| 549 | /* |
| 550 | * If we use ACPI to set PCI IRQs, then we should clear ELCR |
| 551 | * since we will set it correctly as we enable the PCI irq |
| 552 | * routing. |
| 553 | */ |
| 554 | new = acpi_noirq ? old : 0; |
| 555 | |
| 556 | /* |
| 557 | * Update SCI information in the ELCR, it isn't in the PCI |
| 558 | * routing tables.. |
| 559 | */ |
| 560 | switch (trigger) { |
| 561 | case 1: /* Edge - clear */ |
| 562 | new &= ~mask; |
| 563 | break; |
| 564 | case 3: /* Level - set */ |
| 565 | new |= mask; |
| 566 | break; |
| 567 | } |
| 568 | |
| 569 | if (old == new) |
| 570 | return; |
| 571 | |
| 572 | printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); |
| 573 | outb(new, 0x4d0); |
| 574 | outb(new >> 8, 0x4d1); |
| 575 | } |
| 576 | |
| 577 | int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) |
| 578 | { |
| 579 | int rc, irq, trigger, polarity; |
| 580 | |
| 581 | if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { |
| 582 | *irqp = gsi; |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | rc = acpi_get_override_irq(gsi, &trigger, &polarity); |
| 587 | if (rc == 0) { |
| 588 | trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; |
| 589 | polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; |
| 590 | irq = acpi_register_gsi(NULL, gsi, trigger, polarity); |
| 591 | if (irq >= 0) { |
| 592 | *irqp = irq; |
| 593 | return 0; |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | return -1; |
| 598 | } |
| 599 | EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); |
| 600 | |
| 601 | int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) |
| 602 | { |
| 603 | if (isa_irq < nr_legacy_irqs() && |
| 604 | isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { |
| 605 | *gsi = isa_irq_to_gsi[isa_irq]; |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | return -1; |
| 610 | } |
| 611 | |
| 612 | static int acpi_register_gsi_pic(struct device *dev, u32 gsi, |
| 613 | int trigger, int polarity) |
| 614 | { |
| 615 | #ifdef CONFIG_PCI |
| 616 | /* |
| 617 | * Make sure all (legacy) PCI IRQs are set as level-triggered. |
| 618 | */ |
| 619 | if (trigger == ACPI_LEVEL_SENSITIVE) |
| 620 | elcr_set_level_irq(gsi); |
| 621 | #endif |
| 622 | |
| 623 | return gsi; |
| 624 | } |
| 625 | |
| 626 | #ifdef CONFIG_X86_LOCAL_APIC |
| 627 | static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, |
| 628 | int trigger, int polarity) |
| 629 | { |
| 630 | int irq = gsi; |
| 631 | #ifdef CONFIG_X86_IO_APIC |
| 632 | int node; |
| 633 | struct irq_alloc_info info; |
| 634 | |
| 635 | node = dev ? dev_to_node(dev) : NUMA_NO_NODE; |
| 636 | trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; |
| 637 | polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; |
| 638 | ioapic_set_alloc_attr(&info, node, trigger, polarity); |
| 639 | |
| 640 | mutex_lock(&acpi_ioapic_lock); |
| 641 | irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); |
| 642 | /* Don't set up the ACPI SCI because it's already set up */ |
| 643 | if (irq >= 0 && enable_update_mptable && |
| 644 | acpi_gbl_FADT.sci_interrupt != gsi) |
| 645 | mp_config_acpi_gsi(dev, gsi, trigger, polarity); |
| 646 | mutex_unlock(&acpi_ioapic_lock); |
| 647 | #endif |
| 648 | |
| 649 | return irq; |
| 650 | } |
| 651 | |
| 652 | static void acpi_unregister_gsi_ioapic(u32 gsi) |
| 653 | { |
| 654 | #ifdef CONFIG_X86_IO_APIC |
| 655 | int irq; |
| 656 | |
| 657 | mutex_lock(&acpi_ioapic_lock); |
| 658 | irq = mp_map_gsi_to_irq(gsi, 0, NULL); |
| 659 | if (irq > 0) |
| 660 | mp_unmap_irq(irq); |
| 661 | mutex_unlock(&acpi_ioapic_lock); |
| 662 | #endif |
| 663 | } |
| 664 | #endif |
| 665 | |
| 666 | int (*__acpi_register_gsi)(struct device *dev, u32 gsi, |
| 667 | int trigger, int polarity) = acpi_register_gsi_pic; |
| 668 | void (*__acpi_unregister_gsi)(u32 gsi) = NULL; |
| 669 | |
| 670 | #ifdef CONFIG_ACPI_SLEEP |
| 671 | int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; |
| 672 | #else |
| 673 | int (*acpi_suspend_lowlevel)(void); |
| 674 | #endif |
| 675 | |
| 676 | /* |
| 677 | * success: return IRQ number (>=0) |
| 678 | * failure: return < 0 |
| 679 | */ |
| 680 | int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) |
| 681 | { |
| 682 | return __acpi_register_gsi(dev, gsi, trigger, polarity); |
| 683 | } |
| 684 | EXPORT_SYMBOL_GPL(acpi_register_gsi); |
| 685 | |
| 686 | void acpi_unregister_gsi(u32 gsi) |
| 687 | { |
| 688 | if (__acpi_unregister_gsi) |
| 689 | __acpi_unregister_gsi(gsi); |
| 690 | } |
| 691 | EXPORT_SYMBOL_GPL(acpi_unregister_gsi); |
| 692 | |
| 693 | #ifdef CONFIG_X86_LOCAL_APIC |
| 694 | static void __init acpi_set_irq_model_ioapic(void) |
| 695 | { |
| 696 | acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; |
| 697 | __acpi_register_gsi = acpi_register_gsi_ioapic; |
| 698 | __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; |
| 699 | acpi_ioapic = 1; |
| 700 | } |
| 701 | #endif |
| 702 | |
| 703 | /* |
| 704 | * ACPI based hotplug support for CPU |
| 705 | */ |
| 706 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 707 | #include <acpi/processor.h> |
| 708 | |
| 709 | static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) |
| 710 | { |
| 711 | #ifdef CONFIG_ACPI_NUMA |
| 712 | int nid; |
| 713 | |
| 714 | nid = acpi_get_node(handle); |
| 715 | if (nid != -1) { |
| 716 | set_apicid_to_node(physid, nid); |
| 717 | numa_set_node(cpu, nid); |
| 718 | } |
| 719 | #endif |
| 720 | } |
| 721 | |
| 722 | int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) |
| 723 | { |
| 724 | int cpu; |
| 725 | |
| 726 | cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); |
| 727 | if (cpu < 0) { |
| 728 | pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); |
| 729 | return cpu; |
| 730 | } |
| 731 | |
| 732 | acpi_processor_set_pdc(handle); |
| 733 | acpi_map_cpu2node(handle, cpu, physid); |
| 734 | |
| 735 | *pcpu = cpu; |
| 736 | return 0; |
| 737 | } |
| 738 | EXPORT_SYMBOL(acpi_map_cpu); |
| 739 | |
| 740 | int acpi_unmap_cpu(int cpu) |
| 741 | { |
| 742 | #ifdef CONFIG_ACPI_NUMA |
| 743 | set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); |
| 744 | #endif |
| 745 | |
| 746 | per_cpu(x86_cpu_to_apicid, cpu) = -1; |
| 747 | set_cpu_present(cpu, false); |
| 748 | num_processors--; |
| 749 | |
| 750 | return (0); |
| 751 | } |
| 752 | EXPORT_SYMBOL(acpi_unmap_cpu); |
| 753 | #endif /* CONFIG_ACPI_HOTPLUG_CPU */ |
| 754 | |
| 755 | int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) |
| 756 | { |
| 757 | int ret = -ENOSYS; |
| 758 | #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC |
| 759 | int ioapic_id; |
| 760 | u64 addr; |
| 761 | struct ioapic_domain_cfg cfg = { |
| 762 | .type = IOAPIC_DOMAIN_DYNAMIC, |
| 763 | .ops = &mp_ioapic_irqdomain_ops, |
| 764 | }; |
| 765 | |
| 766 | ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); |
| 767 | if (ioapic_id < 0) { |
| 768 | unsigned long long uid; |
| 769 | acpi_status status; |
| 770 | |
| 771 | status = acpi_evaluate_integer(handle, METHOD_NAME__UID, |
| 772 | NULL, &uid); |
| 773 | if (ACPI_FAILURE(status)) { |
| 774 | acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); |
| 775 | return -EINVAL; |
| 776 | } |
| 777 | ioapic_id = (int)uid; |
| 778 | } |
| 779 | |
| 780 | mutex_lock(&acpi_ioapic_lock); |
| 781 | ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); |
| 782 | mutex_unlock(&acpi_ioapic_lock); |
| 783 | #endif |
| 784 | |
| 785 | return ret; |
| 786 | } |
| 787 | EXPORT_SYMBOL(acpi_register_ioapic); |
| 788 | |
| 789 | int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) |
| 790 | { |
| 791 | int ret = -ENOSYS; |
| 792 | |
| 793 | #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC |
| 794 | mutex_lock(&acpi_ioapic_lock); |
| 795 | ret = mp_unregister_ioapic(gsi_base); |
| 796 | mutex_unlock(&acpi_ioapic_lock); |
| 797 | #endif |
| 798 | |
| 799 | return ret; |
| 800 | } |
| 801 | EXPORT_SYMBOL(acpi_unregister_ioapic); |
| 802 | |
| 803 | /** |
| 804 | * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base |
| 805 | * has been registered |
| 806 | * @handle: ACPI handle of the IOAPIC deivce |
| 807 | * @gsi_base: GSI base associated with the IOAPIC |
| 808 | * |
| 809 | * Assume caller holds some type of lock to serialize acpi_ioapic_registered() |
| 810 | * with acpi_register_ioapic()/acpi_unregister_ioapic(). |
| 811 | */ |
| 812 | int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) |
| 813 | { |
| 814 | int ret = 0; |
| 815 | |
| 816 | #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC |
| 817 | mutex_lock(&acpi_ioapic_lock); |
| 818 | ret = mp_ioapic_registered(gsi_base); |
| 819 | mutex_unlock(&acpi_ioapic_lock); |
| 820 | #endif |
| 821 | |
| 822 | return ret; |
| 823 | } |
| 824 | |
| 825 | static int __init acpi_parse_sbf(struct acpi_table_header *table) |
| 826 | { |
| 827 | struct acpi_table_boot *sb = (struct acpi_table_boot *)table; |
| 828 | |
| 829 | sbf_port = sb->cmos_index; /* Save CMOS port */ |
| 830 | |
| 831 | return 0; |
| 832 | } |
| 833 | |
| 834 | #ifdef CONFIG_HPET_TIMER |
| 835 | #include <asm/hpet.h> |
| 836 | |
| 837 | static struct resource *hpet_res __initdata; |
| 838 | |
| 839 | static int __init acpi_parse_hpet(struct acpi_table_header *table) |
| 840 | { |
| 841 | struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; |
| 842 | |
| 843 | if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { |
| 844 | printk(KERN_WARNING PREFIX "HPET timers must be located in " |
| 845 | "memory.\n"); |
| 846 | return -1; |
| 847 | } |
| 848 | |
| 849 | hpet_address = hpet_tbl->address.address; |
| 850 | hpet_blockid = hpet_tbl->sequence; |
| 851 | |
| 852 | /* |
| 853 | * Some broken BIOSes advertise HPET at 0x0. We really do not |
| 854 | * want to allocate a resource there. |
| 855 | */ |
| 856 | if (!hpet_address) { |
| 857 | printk(KERN_WARNING PREFIX |
| 858 | "HPET id: %#x base: %#lx is invalid\n", |
| 859 | hpet_tbl->id, hpet_address); |
| 860 | return 0; |
| 861 | } |
| 862 | #ifdef CONFIG_X86_64 |
| 863 | /* |
| 864 | * Some even more broken BIOSes advertise HPET at |
| 865 | * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add |
| 866 | * some noise: |
| 867 | */ |
| 868 | if (hpet_address == 0xfed0000000000000UL) { |
| 869 | if (!hpet_force_user) { |
| 870 | printk(KERN_WARNING PREFIX "HPET id: %#x " |
| 871 | "base: 0xfed0000000000000 is bogus\n " |
| 872 | "try hpet=force on the kernel command line to " |
| 873 | "fix it up to 0xfed00000.\n", hpet_tbl->id); |
| 874 | hpet_address = 0; |
| 875 | return 0; |
| 876 | } |
| 877 | printk(KERN_WARNING PREFIX |
| 878 | "HPET id: %#x base: 0xfed0000000000000 fixed up " |
| 879 | "to 0xfed00000.\n", hpet_tbl->id); |
| 880 | hpet_address >>= 32; |
| 881 | } |
| 882 | #endif |
| 883 | printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", |
| 884 | hpet_tbl->id, hpet_address); |
| 885 | |
| 886 | /* |
| 887 | * Allocate and initialize the HPET firmware resource for adding into |
| 888 | * the resource tree during the lateinit timeframe. |
| 889 | */ |
| 890 | #define HPET_RESOURCE_NAME_SIZE 9 |
| 891 | hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); |
| 892 | |
| 893 | hpet_res->name = (void *)&hpet_res[1]; |
| 894 | hpet_res->flags = IORESOURCE_MEM; |
| 895 | snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", |
| 896 | hpet_tbl->sequence); |
| 897 | |
| 898 | hpet_res->start = hpet_address; |
| 899 | hpet_res->end = hpet_address + (1 * 1024) - 1; |
| 900 | |
| 901 | return 0; |
| 902 | } |
| 903 | |
| 904 | /* |
| 905 | * hpet_insert_resource inserts the HPET resources used into the resource |
| 906 | * tree. |
| 907 | */ |
| 908 | static __init int hpet_insert_resource(void) |
| 909 | { |
| 910 | if (!hpet_res) |
| 911 | return 1; |
| 912 | |
| 913 | return insert_resource(&iomem_resource, hpet_res); |
| 914 | } |
| 915 | |
| 916 | late_initcall(hpet_insert_resource); |
| 917 | |
| 918 | #else |
| 919 | #define acpi_parse_hpet NULL |
| 920 | #endif |
| 921 | |
| 922 | static int __init acpi_parse_fadt(struct acpi_table_header *table) |
| 923 | { |
| 924 | |
| 925 | #ifdef CONFIG_X86_PM_TIMER |
| 926 | /* detect the location of the ACPI PM Timer */ |
| 927 | if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { |
| 928 | /* FADT rev. 2 */ |
| 929 | if (acpi_gbl_FADT.xpm_timer_block.space_id != |
| 930 | ACPI_ADR_SPACE_SYSTEM_IO) |
| 931 | return 0; |
| 932 | |
| 933 | pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; |
| 934 | /* |
| 935 | * "X" fields are optional extensions to the original V1.0 |
| 936 | * fields, so we must selectively expand V1.0 fields if the |
| 937 | * corresponding X field is zero. |
| 938 | */ |
| 939 | if (!pmtmr_ioport) |
| 940 | pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; |
| 941 | } else { |
| 942 | /* FADT rev. 1 */ |
| 943 | pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; |
| 944 | } |
| 945 | if (pmtmr_ioport) |
| 946 | printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", |
| 947 | pmtmr_ioport); |
| 948 | #endif |
| 949 | return 0; |
| 950 | } |
| 951 | |
| 952 | #ifdef CONFIG_X86_LOCAL_APIC |
| 953 | /* |
| 954 | * Parse LAPIC entries in MADT |
| 955 | * returns 0 on success, < 0 on error |
| 956 | */ |
| 957 | |
| 958 | static int __init early_acpi_parse_madt_lapic_addr_ovr(void) |
| 959 | { |
| 960 | int count; |
| 961 | |
| 962 | if (!cpu_has_apic) |
| 963 | return -ENODEV; |
| 964 | |
| 965 | /* |
| 966 | * Note that the LAPIC address is obtained from the MADT (32-bit value) |
| 967 | * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). |
| 968 | */ |
| 969 | |
| 970 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, |
| 971 | acpi_parse_lapic_addr_ovr, 0); |
| 972 | if (count < 0) { |
| 973 | printk(KERN_ERR PREFIX |
| 974 | "Error parsing LAPIC address override entry\n"); |
| 975 | return count; |
| 976 | } |
| 977 | |
| 978 | register_lapic_address(acpi_lapic_addr); |
| 979 | |
| 980 | return count; |
| 981 | } |
| 982 | |
| 983 | static int __init acpi_parse_madt_lapic_entries(void) |
| 984 | { |
| 985 | int count; |
| 986 | int x2count = 0; |
| 987 | int ret; |
| 988 | struct acpi_subtable_proc madt_proc[2]; |
| 989 | |
| 990 | if (!cpu_has_apic) |
| 991 | return -ENODEV; |
| 992 | |
| 993 | /* |
| 994 | * Note that the LAPIC address is obtained from the MADT (32-bit value) |
| 995 | * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). |
| 996 | */ |
| 997 | |
| 998 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, |
| 999 | acpi_parse_lapic_addr_ovr, 0); |
| 1000 | if (count < 0) { |
| 1001 | printk(KERN_ERR PREFIX |
| 1002 | "Error parsing LAPIC address override entry\n"); |
| 1003 | return count; |
| 1004 | } |
| 1005 | |
| 1006 | register_lapic_address(acpi_lapic_addr); |
| 1007 | |
| 1008 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, |
| 1009 | acpi_parse_sapic, MAX_LOCAL_APIC); |
| 1010 | |
| 1011 | if (!count) { |
| 1012 | memset(madt_proc, 0, sizeof(madt_proc)); |
| 1013 | madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; |
| 1014 | madt_proc[0].handler = acpi_parse_lapic; |
| 1015 | madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; |
| 1016 | madt_proc[1].handler = acpi_parse_x2apic; |
| 1017 | ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, |
| 1018 | sizeof(struct acpi_table_madt), |
| 1019 | madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); |
| 1020 | if (ret < 0) { |
| 1021 | printk(KERN_ERR PREFIX |
| 1022 | "Error parsing LAPIC/X2APIC entries\n"); |
| 1023 | return ret; |
| 1024 | } |
| 1025 | |
| 1026 | x2count = madt_proc[0].count; |
| 1027 | count = madt_proc[1].count; |
| 1028 | } |
| 1029 | if (!count && !x2count) { |
| 1030 | printk(KERN_ERR PREFIX "No LAPIC entries present\n"); |
| 1031 | /* TBD: Cleanup to allow fallback to MPS */ |
| 1032 | return -ENODEV; |
| 1033 | } else if (count < 0 || x2count < 0) { |
| 1034 | printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); |
| 1035 | /* TBD: Cleanup to allow fallback to MPS */ |
| 1036 | return count; |
| 1037 | } |
| 1038 | |
| 1039 | x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, |
| 1040 | acpi_parse_x2apic_nmi, 0); |
| 1041 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, |
| 1042 | acpi_parse_lapic_nmi, 0); |
| 1043 | if (count < 0 || x2count < 0) { |
| 1044 | printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); |
| 1045 | /* TBD: Cleanup to allow fallback to MPS */ |
| 1046 | return count; |
| 1047 | } |
| 1048 | return 0; |
| 1049 | } |
| 1050 | #endif /* CONFIG_X86_LOCAL_APIC */ |
| 1051 | |
| 1052 | #ifdef CONFIG_X86_IO_APIC |
| 1053 | static void __init mp_config_acpi_legacy_irqs(void) |
| 1054 | { |
| 1055 | int i; |
| 1056 | struct mpc_intsrc mp_irq; |
| 1057 | |
| 1058 | #ifdef CONFIG_EISA |
| 1059 | /* |
| 1060 | * Fabricate the legacy ISA bus (bus #31). |
| 1061 | */ |
| 1062 | mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; |
| 1063 | #endif |
| 1064 | set_bit(MP_ISA_BUS, mp_bus_not_pci); |
| 1065 | pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); |
| 1066 | |
| 1067 | /* |
| 1068 | * Use the default configuration for the IRQs 0-15. Unless |
| 1069 | * overridden by (MADT) interrupt source override entries. |
| 1070 | */ |
| 1071 | for (i = 0; i < nr_legacy_irqs(); i++) { |
| 1072 | int ioapic, pin; |
| 1073 | unsigned int dstapic; |
| 1074 | int idx; |
| 1075 | u32 gsi; |
| 1076 | |
| 1077 | /* Locate the gsi that irq i maps to. */ |
| 1078 | if (acpi_isa_irq_to_gsi(i, &gsi)) |
| 1079 | continue; |
| 1080 | |
| 1081 | /* |
| 1082 | * Locate the IOAPIC that manages the ISA IRQ. |
| 1083 | */ |
| 1084 | ioapic = mp_find_ioapic(gsi); |
| 1085 | if (ioapic < 0) |
| 1086 | continue; |
| 1087 | pin = mp_find_ioapic_pin(ioapic, gsi); |
| 1088 | dstapic = mpc_ioapic_id(ioapic); |
| 1089 | |
| 1090 | for (idx = 0; idx < mp_irq_entries; idx++) { |
| 1091 | struct mpc_intsrc *irq = mp_irqs + idx; |
| 1092 | |
| 1093 | /* Do we already have a mapping for this ISA IRQ? */ |
| 1094 | if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) |
| 1095 | break; |
| 1096 | |
| 1097 | /* Do we already have a mapping for this IOAPIC pin */ |
| 1098 | if (irq->dstapic == dstapic && irq->dstirq == pin) |
| 1099 | break; |
| 1100 | } |
| 1101 | |
| 1102 | if (idx != mp_irq_entries) { |
| 1103 | printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); |
| 1104 | continue; /* IRQ already used */ |
| 1105 | } |
| 1106 | |
| 1107 | mp_irq.type = MP_INTSRC; |
| 1108 | mp_irq.irqflag = 0; /* Conforming */ |
| 1109 | mp_irq.srcbus = MP_ISA_BUS; |
| 1110 | mp_irq.dstapic = dstapic; |
| 1111 | mp_irq.irqtype = mp_INT; |
| 1112 | mp_irq.srcbusirq = i; /* Identity mapped */ |
| 1113 | mp_irq.dstirq = pin; |
| 1114 | |
| 1115 | mp_save_irq(&mp_irq); |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | /* |
| 1120 | * Parse IOAPIC related entries in MADT |
| 1121 | * returns 0 on success, < 0 on error |
| 1122 | */ |
| 1123 | static int __init acpi_parse_madt_ioapic_entries(void) |
| 1124 | { |
| 1125 | int count; |
| 1126 | |
| 1127 | /* |
| 1128 | * ACPI interpreter is required to complete interrupt setup, |
| 1129 | * so if it is off, don't enumerate the io-apics with ACPI. |
| 1130 | * If MPS is present, it will handle them, |
| 1131 | * otherwise the system will stay in PIC mode |
| 1132 | */ |
| 1133 | if (acpi_disabled || acpi_noirq) |
| 1134 | return -ENODEV; |
| 1135 | |
| 1136 | if (!cpu_has_apic) |
| 1137 | return -ENODEV; |
| 1138 | |
| 1139 | /* |
| 1140 | * if "noapic" boot option, don't look for IO-APICs |
| 1141 | */ |
| 1142 | if (skip_ioapic_setup) { |
| 1143 | printk(KERN_INFO PREFIX "Skipping IOAPIC probe " |
| 1144 | "due to 'noapic' option.\n"); |
| 1145 | return -ENODEV; |
| 1146 | } |
| 1147 | |
| 1148 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, |
| 1149 | MAX_IO_APICS); |
| 1150 | if (!count) { |
| 1151 | printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); |
| 1152 | return -ENODEV; |
| 1153 | } else if (count < 0) { |
| 1154 | printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); |
| 1155 | return count; |
| 1156 | } |
| 1157 | |
| 1158 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, |
| 1159 | acpi_parse_int_src_ovr, nr_irqs); |
| 1160 | if (count < 0) { |
| 1161 | printk(KERN_ERR PREFIX |
| 1162 | "Error parsing interrupt source overrides entry\n"); |
| 1163 | /* TBD: Cleanup to allow fallback to MPS */ |
| 1164 | return count; |
| 1165 | } |
| 1166 | |
| 1167 | /* |
| 1168 | * If BIOS did not supply an INT_SRC_OVR for the SCI |
| 1169 | * pretend we got one so we can set the SCI flags. |
| 1170 | */ |
| 1171 | if (!acpi_sci_override_gsi) |
| 1172 | acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, |
| 1173 | acpi_gbl_FADT.sci_interrupt); |
| 1174 | |
| 1175 | /* Fill in identity legacy mappings where no override */ |
| 1176 | mp_config_acpi_legacy_irqs(); |
| 1177 | |
| 1178 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, |
| 1179 | acpi_parse_nmi_src, nr_irqs); |
| 1180 | if (count < 0) { |
| 1181 | printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); |
| 1182 | /* TBD: Cleanup to allow fallback to MPS */ |
| 1183 | return count; |
| 1184 | } |
| 1185 | |
| 1186 | return 0; |
| 1187 | } |
| 1188 | #else |
| 1189 | static inline int acpi_parse_madt_ioapic_entries(void) |
| 1190 | { |
| 1191 | return -1; |
| 1192 | } |
| 1193 | #endif /* !CONFIG_X86_IO_APIC */ |
| 1194 | |
| 1195 | static void __init early_acpi_process_madt(void) |
| 1196 | { |
| 1197 | #ifdef CONFIG_X86_LOCAL_APIC |
| 1198 | int error; |
| 1199 | |
| 1200 | if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { |
| 1201 | |
| 1202 | /* |
| 1203 | * Parse MADT LAPIC entries |
| 1204 | */ |
| 1205 | error = early_acpi_parse_madt_lapic_addr_ovr(); |
| 1206 | if (!error) { |
| 1207 | acpi_lapic = 1; |
| 1208 | smp_found_config = 1; |
| 1209 | } |
| 1210 | if (error == -EINVAL) { |
| 1211 | /* |
| 1212 | * Dell Precision Workstation 410, 610 come here. |
| 1213 | */ |
| 1214 | printk(KERN_ERR PREFIX |
| 1215 | "Invalid BIOS MADT, disabling ACPI\n"); |
| 1216 | disable_acpi(); |
| 1217 | } |
| 1218 | } |
| 1219 | #endif |
| 1220 | } |
| 1221 | |
| 1222 | static void __init acpi_process_madt(void) |
| 1223 | { |
| 1224 | #ifdef CONFIG_X86_LOCAL_APIC |
| 1225 | int error; |
| 1226 | |
| 1227 | if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { |
| 1228 | |
| 1229 | /* |
| 1230 | * Parse MADT LAPIC entries |
| 1231 | */ |
| 1232 | error = acpi_parse_madt_lapic_entries(); |
| 1233 | if (!error) { |
| 1234 | acpi_lapic = 1; |
| 1235 | |
| 1236 | /* |
| 1237 | * Parse MADT IO-APIC entries |
| 1238 | */ |
| 1239 | mutex_lock(&acpi_ioapic_lock); |
| 1240 | error = acpi_parse_madt_ioapic_entries(); |
| 1241 | mutex_unlock(&acpi_ioapic_lock); |
| 1242 | if (!error) { |
| 1243 | acpi_set_irq_model_ioapic(); |
| 1244 | |
| 1245 | smp_found_config = 1; |
| 1246 | } |
| 1247 | } |
| 1248 | if (error == -EINVAL) { |
| 1249 | /* |
| 1250 | * Dell Precision Workstation 410, 610 come here. |
| 1251 | */ |
| 1252 | printk(KERN_ERR PREFIX |
| 1253 | "Invalid BIOS MADT, disabling ACPI\n"); |
| 1254 | disable_acpi(); |
| 1255 | } |
| 1256 | } else { |
| 1257 | /* |
| 1258 | * ACPI found no MADT, and so ACPI wants UP PIC mode. |
| 1259 | * In the event an MPS table was found, forget it. |
| 1260 | * Boot with "acpi=off" to use MPS on such a system. |
| 1261 | */ |
| 1262 | if (smp_found_config) { |
| 1263 | printk(KERN_WARNING PREFIX |
| 1264 | "No APIC-table, disabling MPS\n"); |
| 1265 | smp_found_config = 0; |
| 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | /* |
| 1270 | * ACPI supports both logical (e.g. Hyper-Threading) and physical |
| 1271 | * processors, where MPS only supports physical. |
| 1272 | */ |
| 1273 | if (acpi_lapic && acpi_ioapic) |
| 1274 | printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " |
| 1275 | "information\n"); |
| 1276 | else if (acpi_lapic) |
| 1277 | printk(KERN_INFO "Using ACPI for processor (LAPIC) " |
| 1278 | "configuration information\n"); |
| 1279 | #endif |
| 1280 | return; |
| 1281 | } |
| 1282 | |
| 1283 | static int __init disable_acpi_irq(const struct dmi_system_id *d) |
| 1284 | { |
| 1285 | if (!acpi_force) { |
| 1286 | printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", |
| 1287 | d->ident); |
| 1288 | acpi_noirq_set(); |
| 1289 | } |
| 1290 | return 0; |
| 1291 | } |
| 1292 | |
| 1293 | static int __init disable_acpi_pci(const struct dmi_system_id *d) |
| 1294 | { |
| 1295 | if (!acpi_force) { |
| 1296 | printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", |
| 1297 | d->ident); |
| 1298 | acpi_disable_pci(); |
| 1299 | } |
| 1300 | return 0; |
| 1301 | } |
| 1302 | |
| 1303 | static int __init dmi_disable_acpi(const struct dmi_system_id *d) |
| 1304 | { |
| 1305 | if (!acpi_force) { |
| 1306 | printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); |
| 1307 | disable_acpi(); |
| 1308 | } else { |
| 1309 | printk(KERN_NOTICE |
| 1310 | "Warning: DMI blacklist says broken, but acpi forced\n"); |
| 1311 | } |
| 1312 | return 0; |
| 1313 | } |
| 1314 | |
| 1315 | /* |
| 1316 | * Force ignoring BIOS IRQ0 override |
| 1317 | */ |
| 1318 | static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) |
| 1319 | { |
| 1320 | if (!acpi_skip_timer_override) { |
| 1321 | pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", |
| 1322 | d->ident); |
| 1323 | acpi_skip_timer_override = 1; |
| 1324 | } |
| 1325 | return 0; |
| 1326 | } |
| 1327 | |
| 1328 | /* |
| 1329 | * ACPI offers an alternative platform interface model that removes |
| 1330 | * ACPI hardware requirements for platforms that do not implement |
| 1331 | * the PC Architecture. |
| 1332 | * |
| 1333 | * We initialize the Hardware-reduced ACPI model here: |
| 1334 | */ |
| 1335 | static void __init acpi_reduced_hw_init(void) |
| 1336 | { |
| 1337 | if (acpi_gbl_reduced_hardware) { |
| 1338 | /* |
| 1339 | * Override x86_init functions and bypass legacy pic |
| 1340 | * in Hardware-reduced ACPI mode |
| 1341 | */ |
| 1342 | x86_init.timers.timer_init = x86_init_noop; |
| 1343 | x86_init.irqs.pre_vector_init = x86_init_noop; |
| 1344 | legacy_pic = &null_legacy_pic; |
| 1345 | } |
| 1346 | } |
| 1347 | |
| 1348 | /* |
| 1349 | * If your system is blacklisted here, but you find that acpi=force |
| 1350 | * works for you, please contact linux-acpi@vger.kernel.org |
| 1351 | */ |
| 1352 | static struct dmi_system_id __initdata acpi_dmi_table[] = { |
| 1353 | /* |
| 1354 | * Boxes that need ACPI disabled |
| 1355 | */ |
| 1356 | { |
| 1357 | .callback = dmi_disable_acpi, |
| 1358 | .ident = "IBM Thinkpad", |
| 1359 | .matches = { |
| 1360 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), |
| 1361 | DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), |
| 1362 | }, |
| 1363 | }, |
| 1364 | |
| 1365 | /* |
| 1366 | * Boxes that need ACPI PCI IRQ routing disabled |
| 1367 | */ |
| 1368 | { |
| 1369 | .callback = disable_acpi_irq, |
| 1370 | .ident = "ASUS A7V", |
| 1371 | .matches = { |
| 1372 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), |
| 1373 | DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), |
| 1374 | /* newer BIOS, Revision 1011, does work */ |
| 1375 | DMI_MATCH(DMI_BIOS_VERSION, |
| 1376 | "ASUS A7V ACPI BIOS Revision 1007"), |
| 1377 | }, |
| 1378 | }, |
| 1379 | { |
| 1380 | /* |
| 1381 | * Latest BIOS for IBM 600E (1.16) has bad pcinum |
| 1382 | * for LPC bridge, which is needed for the PCI |
| 1383 | * interrupt links to work. DSDT fix is in bug 5966. |
| 1384 | * 2645, 2646 model numbers are shared with 600/600E/600X |
| 1385 | */ |
| 1386 | .callback = disable_acpi_irq, |
| 1387 | .ident = "IBM Thinkpad 600 Series 2645", |
| 1388 | .matches = { |
| 1389 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), |
| 1390 | DMI_MATCH(DMI_BOARD_NAME, "2645"), |
| 1391 | }, |
| 1392 | }, |
| 1393 | { |
| 1394 | .callback = disable_acpi_irq, |
| 1395 | .ident = "IBM Thinkpad 600 Series 2646", |
| 1396 | .matches = { |
| 1397 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), |
| 1398 | DMI_MATCH(DMI_BOARD_NAME, "2646"), |
| 1399 | }, |
| 1400 | }, |
| 1401 | /* |
| 1402 | * Boxes that need ACPI PCI IRQ routing and PCI scan disabled |
| 1403 | */ |
| 1404 | { /* _BBN 0 bug */ |
| 1405 | .callback = disable_acpi_pci, |
| 1406 | .ident = "ASUS PR-DLS", |
| 1407 | .matches = { |
| 1408 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| 1409 | DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), |
| 1410 | DMI_MATCH(DMI_BIOS_VERSION, |
| 1411 | "ASUS PR-DLS ACPI BIOS Revision 1010"), |
| 1412 | DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") |
| 1413 | }, |
| 1414 | }, |
| 1415 | { |
| 1416 | .callback = disable_acpi_pci, |
| 1417 | .ident = "Acer TravelMate 36x Laptop", |
| 1418 | .matches = { |
| 1419 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
| 1420 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), |
| 1421 | }, |
| 1422 | }, |
| 1423 | {} |
| 1424 | }; |
| 1425 | |
| 1426 | /* second table for DMI checks that should run after early-quirks */ |
| 1427 | static struct dmi_system_id __initdata acpi_dmi_table_late[] = { |
| 1428 | /* |
| 1429 | * HP laptops which use a DSDT reporting as HP/SB400/10000, |
| 1430 | * which includes some code which overrides all temperature |
| 1431 | * trip points to 16C if the INTIN2 input of the I/O APIC |
| 1432 | * is enabled. This input is incorrectly designated the |
| 1433 | * ISA IRQ 0 via an interrupt source override even though |
| 1434 | * it is wired to the output of the master 8259A and INTIN0 |
| 1435 | * is not connected at all. Force ignoring BIOS IRQ0 |
| 1436 | * override in that cases. |
| 1437 | */ |
| 1438 | { |
| 1439 | .callback = dmi_ignore_irq0_timer_override, |
| 1440 | .ident = "HP nx6115 laptop", |
| 1441 | .matches = { |
| 1442 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 1443 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), |
| 1444 | }, |
| 1445 | }, |
| 1446 | { |
| 1447 | .callback = dmi_ignore_irq0_timer_override, |
| 1448 | .ident = "HP NX6125 laptop", |
| 1449 | .matches = { |
| 1450 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 1451 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), |
| 1452 | }, |
| 1453 | }, |
| 1454 | { |
| 1455 | .callback = dmi_ignore_irq0_timer_override, |
| 1456 | .ident = "HP NX6325 laptop", |
| 1457 | .matches = { |
| 1458 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 1459 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), |
| 1460 | }, |
| 1461 | }, |
| 1462 | { |
| 1463 | .callback = dmi_ignore_irq0_timer_override, |
| 1464 | .ident = "HP 6715b laptop", |
| 1465 | .matches = { |
| 1466 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 1467 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), |
| 1468 | }, |
| 1469 | }, |
| 1470 | { |
| 1471 | .callback = dmi_ignore_irq0_timer_override, |
| 1472 | .ident = "FUJITSU SIEMENS", |
| 1473 | .matches = { |
| 1474 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), |
| 1475 | DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), |
| 1476 | }, |
| 1477 | }, |
| 1478 | {} |
| 1479 | }; |
| 1480 | |
| 1481 | /* |
| 1482 | * acpi_boot_table_init() and acpi_boot_init() |
| 1483 | * called from setup_arch(), always. |
| 1484 | * 1. checksums all tables |
| 1485 | * 2. enumerates lapics |
| 1486 | * 3. enumerates io-apics |
| 1487 | * |
| 1488 | * acpi_table_init() is separate to allow reading SRAT without |
| 1489 | * other side effects. |
| 1490 | * |
| 1491 | * side effects of acpi_boot_init: |
| 1492 | * acpi_lapic = 1 if LAPIC found |
| 1493 | * acpi_ioapic = 1 if IOAPIC found |
| 1494 | * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; |
| 1495 | * if acpi_blacklisted() acpi_disabled = 1; |
| 1496 | * acpi_irq_model=... |
| 1497 | * ... |
| 1498 | */ |
| 1499 | |
| 1500 | void __init acpi_boot_table_init(void) |
| 1501 | { |
| 1502 | dmi_check_system(acpi_dmi_table); |
| 1503 | |
| 1504 | /* |
| 1505 | * If acpi_disabled, bail out |
| 1506 | */ |
| 1507 | if (acpi_disabled) |
| 1508 | return; |
| 1509 | |
| 1510 | /* |
| 1511 | * Initialize the ACPI boot-time table parser. |
| 1512 | */ |
| 1513 | if (acpi_table_init()) { |
| 1514 | disable_acpi(); |
| 1515 | return; |
| 1516 | } |
| 1517 | |
| 1518 | acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); |
| 1519 | |
| 1520 | /* |
| 1521 | * blacklist may disable ACPI entirely |
| 1522 | */ |
| 1523 | if (acpi_blacklisted()) { |
| 1524 | if (acpi_force) { |
| 1525 | printk(KERN_WARNING PREFIX "acpi=force override\n"); |
| 1526 | } else { |
| 1527 | printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); |
| 1528 | disable_acpi(); |
| 1529 | return; |
| 1530 | } |
| 1531 | } |
| 1532 | } |
| 1533 | |
| 1534 | int __init early_acpi_boot_init(void) |
| 1535 | { |
| 1536 | /* |
| 1537 | * If acpi_disabled, bail out |
| 1538 | */ |
| 1539 | if (acpi_disabled) |
| 1540 | return 1; |
| 1541 | |
| 1542 | /* |
| 1543 | * Process the Multiple APIC Description Table (MADT), if present |
| 1544 | */ |
| 1545 | early_acpi_process_madt(); |
| 1546 | |
| 1547 | /* |
| 1548 | * Hardware-reduced ACPI mode initialization: |
| 1549 | */ |
| 1550 | acpi_reduced_hw_init(); |
| 1551 | |
| 1552 | return 0; |
| 1553 | } |
| 1554 | |
| 1555 | int __init acpi_boot_init(void) |
| 1556 | { |
| 1557 | /* those are executed after early-quirks are executed */ |
| 1558 | dmi_check_system(acpi_dmi_table_late); |
| 1559 | |
| 1560 | /* |
| 1561 | * If acpi_disabled, bail out |
| 1562 | */ |
| 1563 | if (acpi_disabled) |
| 1564 | return 1; |
| 1565 | |
| 1566 | acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); |
| 1567 | |
| 1568 | /* |
| 1569 | * set sci_int and PM timer address |
| 1570 | */ |
| 1571 | acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); |
| 1572 | |
| 1573 | /* |
| 1574 | * Process the Multiple APIC Description Table (MADT), if present |
| 1575 | */ |
| 1576 | acpi_process_madt(); |
| 1577 | |
| 1578 | acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); |
| 1579 | |
| 1580 | if (!acpi_noirq) |
| 1581 | x86_init.pci.init = pci_acpi_init; |
| 1582 | |
| 1583 | return 0; |
| 1584 | } |
| 1585 | |
| 1586 | static int __init parse_acpi(char *arg) |
| 1587 | { |
| 1588 | if (!arg) |
| 1589 | return -EINVAL; |
| 1590 | |
| 1591 | /* "acpi=off" disables both ACPI table parsing and interpreter */ |
| 1592 | if (strcmp(arg, "off") == 0) { |
| 1593 | disable_acpi(); |
| 1594 | } |
| 1595 | /* acpi=force to over-ride black-list */ |
| 1596 | else if (strcmp(arg, "force") == 0) { |
| 1597 | acpi_force = 1; |
| 1598 | acpi_disabled = 0; |
| 1599 | } |
| 1600 | /* acpi=strict disables out-of-spec workarounds */ |
| 1601 | else if (strcmp(arg, "strict") == 0) { |
| 1602 | acpi_strict = 1; |
| 1603 | } |
| 1604 | /* acpi=rsdt use RSDT instead of XSDT */ |
| 1605 | else if (strcmp(arg, "rsdt") == 0) { |
| 1606 | acpi_gbl_do_not_use_xsdt = TRUE; |
| 1607 | } |
| 1608 | /* "acpi=noirq" disables ACPI interrupt routing */ |
| 1609 | else if (strcmp(arg, "noirq") == 0) { |
| 1610 | acpi_noirq_set(); |
| 1611 | } |
| 1612 | /* "acpi=copy_dsdt" copys DSDT */ |
| 1613 | else if (strcmp(arg, "copy_dsdt") == 0) { |
| 1614 | acpi_gbl_copy_dsdt_locally = 1; |
| 1615 | } |
| 1616 | /* "acpi=nocmcff" disables FF mode for corrected errors */ |
| 1617 | else if (strcmp(arg, "nocmcff") == 0) { |
| 1618 | acpi_disable_cmcff = 1; |
| 1619 | } else { |
| 1620 | /* Core will printk when we return error. */ |
| 1621 | return -EINVAL; |
| 1622 | } |
| 1623 | return 0; |
| 1624 | } |
| 1625 | early_param("acpi", parse_acpi); |
| 1626 | |
| 1627 | /* FIXME: Using pci= for an ACPI parameter is a travesty. */ |
| 1628 | static int __init parse_pci(char *arg) |
| 1629 | { |
| 1630 | if (arg && strcmp(arg, "noacpi") == 0) |
| 1631 | acpi_disable_pci(); |
| 1632 | return 0; |
| 1633 | } |
| 1634 | early_param("pci", parse_pci); |
| 1635 | |
| 1636 | int __init acpi_mps_check(void) |
| 1637 | { |
| 1638 | #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) |
| 1639 | /* mptable code is not built-in*/ |
| 1640 | if (acpi_disabled || acpi_noirq) { |
| 1641 | printk(KERN_WARNING "MPS support code is not built-in.\n" |
| 1642 | "Using acpi=off or acpi=noirq or pci=noacpi " |
| 1643 | "may have problem\n"); |
| 1644 | return 1; |
| 1645 | } |
| 1646 | #endif |
| 1647 | return 0; |
| 1648 | } |
| 1649 | |
| 1650 | #ifdef CONFIG_X86_IO_APIC |
| 1651 | static int __init parse_acpi_skip_timer_override(char *arg) |
| 1652 | { |
| 1653 | acpi_skip_timer_override = 1; |
| 1654 | return 0; |
| 1655 | } |
| 1656 | early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); |
| 1657 | |
| 1658 | static int __init parse_acpi_use_timer_override(char *arg) |
| 1659 | { |
| 1660 | acpi_use_timer_override = 1; |
| 1661 | return 0; |
| 1662 | } |
| 1663 | early_param("acpi_use_timer_override", parse_acpi_use_timer_override); |
| 1664 | #endif /* CONFIG_X86_IO_APIC */ |
| 1665 | |
| 1666 | static int __init setup_acpi_sci(char *s) |
| 1667 | { |
| 1668 | if (!s) |
| 1669 | return -EINVAL; |
| 1670 | if (!strcmp(s, "edge")) |
| 1671 | acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | |
| 1672 | (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); |
| 1673 | else if (!strcmp(s, "level")) |
| 1674 | acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | |
| 1675 | (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); |
| 1676 | else if (!strcmp(s, "high")) |
| 1677 | acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | |
| 1678 | (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); |
| 1679 | else if (!strcmp(s, "low")) |
| 1680 | acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | |
| 1681 | (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); |
| 1682 | else |
| 1683 | return -EINVAL; |
| 1684 | return 0; |
| 1685 | } |
| 1686 | early_param("acpi_sci", setup_acpi_sci); |
| 1687 | |
| 1688 | int __acpi_acquire_global_lock(unsigned int *lock) |
| 1689 | { |
| 1690 | unsigned int old, new, val; |
| 1691 | do { |
| 1692 | old = *lock; |
| 1693 | new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); |
| 1694 | val = cmpxchg(lock, old, new); |
| 1695 | } while (unlikely (val != old)); |
| 1696 | return (new < 3) ? -1 : 0; |
| 1697 | } |
| 1698 | |
| 1699 | int __acpi_release_global_lock(unsigned int *lock) |
| 1700 | { |
| 1701 | unsigned int old, new, val; |
| 1702 | do { |
| 1703 | old = *lock; |
| 1704 | new = old & ~0x3; |
| 1705 | val = cmpxchg(lock, old, new); |
| 1706 | } while (unlikely (val != old)); |
| 1707 | return old & 0x1; |
| 1708 | } |
| 1709 | |
| 1710 | void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) |
| 1711 | { |
| 1712 | e820_add_region(addr, size, E820_ACPI); |
| 1713 | update_e820(); |
| 1714 | } |