linux/arch/x86/kernel/acpi/boot.c
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   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/pci_x86.h>
  40#include <asm/pgtable.h>
  41#include <asm/io_apic.h>
  42#include <asm/apic.h>
  43#include <asm/io.h>
  44#include <asm/mpspec.h>
  45#include <asm/smp.h>
  46
  47static int __initdata acpi_force = 0;
  48u32 acpi_rsdt_forced;
  49int acpi_disabled;
  50EXPORT_SYMBOL(acpi_disabled);
  51
  52#ifdef  CONFIG_X86_64
  53# include <asm/proto.h>
  54# include <asm/numa_64.h>
  55#endif                          /* X86 */
  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
  63int acpi_noirq;                         /* skip ACPI IRQ initialization */
  64int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  65EXPORT_SYMBOL(acpi_pci_disabled);
  66
  67int acpi_lapic;
  68int acpi_ioapic;
  69int acpi_strict;
  70
  71u8 acpi_sci_flags __initdata;
  72int acpi_sci_override_gsi __initdata;
  73int acpi_skip_timer_override __initdata;
  74int acpi_use_timer_override __initdata;
  75int acpi_fix_pin2_polarity __initdata;
  76
  77#ifdef CONFIG_X86_LOCAL_APIC
  78static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  79#endif
  80
  81#ifndef __HAVE_ARCH_CMPXCHG
  82#warning ACPI uses CMPXCHG, i486 and later hardware
  83#endif
  84
  85/* --------------------------------------------------------------------------
  86                              Boot-time Configuration
  87   -------------------------------------------------------------------------- */
  88
  89/*
  90 * The default interrupt routing model is PIC (8259).  This gets
  91 * overridden if IOAPICs are enumerated (below).
  92 */
  93enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  94
  95
  96/*
  97 * ISA irqs by default are the first 16 gsis but can be
  98 * any gsi as specified by an interrupt source override.
  99 */
 100static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 101        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 102};
 103
 104static unsigned int gsi_to_irq(unsigned int gsi)
 105{
 106        unsigned int irq = gsi + NR_IRQS_LEGACY;
 107        unsigned int i;
 108
 109        for (i = 0; i < NR_IRQS_LEGACY; i++) {
 110                if (isa_irq_to_gsi[i] == gsi) {
 111                        return i;
 112                }
 113        }
 114
 115        /* Provide an identity mapping of gsi == irq
 116         * except on truly weird platforms that have
 117         * non isa irqs in the first 16 gsis.
 118         */
 119        if (gsi >= NR_IRQS_LEGACY)
 120                irq = gsi;
 121        else
 122                irq = gsi_top + gsi;
 123
 124        return irq;
 125}
 126
 127static u32 irq_to_gsi(int irq)
 128{
 129        unsigned int gsi;
 130
 131        if (irq < NR_IRQS_LEGACY)
 132                gsi = isa_irq_to_gsi[irq];
 133        else if (irq < gsi_top)
 134                gsi = irq;
 135        else if (irq < (gsi_top + NR_IRQS_LEGACY))
 136                gsi = irq - gsi_top;
 137        else
 138                gsi = 0xffffffff;
 139
 140        return gsi;
 141}
 142
 143/*
 144 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
 145 * to map the target physical address. The problem is that set_fixmap()
 146 * provides a single page, and it is possible that the page is not
 147 * sufficient.
 148 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 149 * i.e. until the next __va_range() call.
 150 *
 151 * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 152 * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 153 * count idx down while incrementing the phys address.
 154 */
 155char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 156{
 157
 158        if (!phys || !size)
 159                return NULL;
 160
 161        return early_ioremap(phys, size);
 162}
 163void __init __acpi_unmap_table(char *map, unsigned long size)
 164{
 165        if (!map || !size)
 166                return;
 167
 168        early_iounmap(map, size);
 169}
 170
 171#ifdef CONFIG_X86_LOCAL_APIC
 172static int __init acpi_parse_madt(struct acpi_table_header *table)
 173{
 174        struct acpi_table_madt *madt = NULL;
 175
 176        if (!cpu_has_apic)
 177                return -EINVAL;
 178
 179        madt = (struct acpi_table_madt *)table;
 180        if (!madt) {
 181                printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 182                return -ENODEV;
 183        }
 184
 185        if (madt->address) {
 186                acpi_lapic_addr = (u64) madt->address;
 187
 188                printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 189                       madt->address);
 190        }
 191
 192        default_acpi_madt_oem_check(madt->header.oem_id,
 193                                    madt->header.oem_table_id);
 194
 195        return 0;
 196}
 197
 198static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 199{
 200        unsigned int ver = 0;
 201
 202        if (id >= (MAX_LOCAL_APIC-1)) {
 203                printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 204                return;
 205        }
 206
 207        if (!enabled) {
 208                ++disabled_cpus;
 209                return;
 210        }
 211
 212        if (boot_cpu_physical_apicid != -1U)
 213                ver = apic_version[boot_cpu_physical_apicid];
 214
 215        generic_processor_info(id, ver);
 216}
 217
 218static int __init
 219acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 220{
 221        struct acpi_madt_local_x2apic *processor = NULL;
 222
 223        processor = (struct acpi_madt_local_x2apic *)header;
 224
 225        if (BAD_MADT_ENTRY(processor, end))
 226                return -EINVAL;
 227
 228        acpi_table_print_madt_entry(header);
 229
 230#ifdef CONFIG_X86_X2APIC
 231        /*
 232         * We need to register disabled CPU as well to permit
 233         * counting disabled CPUs. This allows us to size
 234         * cpus_possible_map more accurately, to permit
 235         * to not preallocating memory for all NR_CPUS
 236         * when we use CPU hotplug.
 237         */
 238        acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 239                            processor->lapic_flags & ACPI_MADT_ENABLED);
 240#else
 241        printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 242#endif
 243
 244        return 0;
 245}
 246
 247static int __init
 248acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 249{
 250        struct acpi_madt_local_apic *processor = NULL;
 251
 252        processor = (struct acpi_madt_local_apic *)header;
 253
 254        if (BAD_MADT_ENTRY(processor, end))
 255                return -EINVAL;
 256
 257        acpi_table_print_madt_entry(header);
 258
 259        /*
 260         * We need to register disabled CPU as well to permit
 261         * counting disabled CPUs. This allows us to size
 262         * cpus_possible_map more accurately, to permit
 263         * to not preallocating memory for all NR_CPUS
 264         * when we use CPU hotplug.
 265         */
 266        acpi_register_lapic(processor->id,      /* APIC ID */
 267                            processor->lapic_flags & ACPI_MADT_ENABLED);
 268
 269        return 0;
 270}
 271
 272static int __init
 273acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 274{
 275        struct acpi_madt_local_sapic *processor = NULL;
 276
 277        processor = (struct acpi_madt_local_sapic *)header;
 278
 279        if (BAD_MADT_ENTRY(processor, end))
 280                return -EINVAL;
 281
 282        acpi_table_print_madt_entry(header);
 283
 284        acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 285                            processor->lapic_flags & ACPI_MADT_ENABLED);
 286
 287        return 0;
 288}
 289
 290static int __init
 291acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 292                          const unsigned long end)
 293{
 294        struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 295
 296        lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 297
 298        if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 299                return -EINVAL;
 300
 301        acpi_lapic_addr = lapic_addr_ovr->address;
 302
 303        return 0;
 304}
 305
 306static int __init
 307acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 308                      const unsigned long end)
 309{
 310        struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 311
 312        x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 313
 314        if (BAD_MADT_ENTRY(x2apic_nmi, end))
 315                return -EINVAL;
 316
 317        acpi_table_print_madt_entry(header);
 318
 319        if (x2apic_nmi->lint != 1)
 320                printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 321
 322        return 0;
 323}
 324
 325static int __init
 326acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 327{
 328        struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 329
 330        lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 331
 332        if (BAD_MADT_ENTRY(lapic_nmi, end))
 333                return -EINVAL;
 334
 335        acpi_table_print_madt_entry(header);
 336
 337        if (lapic_nmi->lint != 1)
 338                printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 339
 340        return 0;
 341}
 342
 343#endif                          /*CONFIG_X86_LOCAL_APIC */
 344
 345#ifdef CONFIG_X86_IO_APIC
 346
 347static int __init
 348acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 349{
 350        struct acpi_madt_io_apic *ioapic = NULL;
 351
 352        ioapic = (struct acpi_madt_io_apic *)header;
 353
 354        if (BAD_MADT_ENTRY(ioapic, end))
 355                return -EINVAL;
 356
 357        acpi_table_print_madt_entry(header);
 358
 359        mp_register_ioapic(ioapic->id,
 360                           ioapic->address, ioapic->global_irq_base);
 361
 362        return 0;
 363}
 364
 365/*
 366 * Parse Interrupt Source Override for the ACPI SCI
 367 */
 368static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 369{
 370        if (trigger == 0)       /* compatible SCI trigger is level */
 371                trigger = 3;
 372
 373        if (polarity == 0)      /* compatible SCI polarity is low */
 374                polarity = 3;
 375
 376        /* Command-line over-ride via acpi_sci= */
 377        if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 378                trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 379
 380        if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 381                polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 382
 383        /*
 384         * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 385         * If GSI is < 16, this will update its flags,
 386         * else it will create a new mp_irqs[] entry.
 387         */
 388        mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 389
 390        /*
 391         * stash over-ride to indicate we've been here
 392         * and for later update of acpi_gbl_FADT
 393         */
 394        acpi_sci_override_gsi = gsi;
 395        return;
 396}
 397
 398static int __init
 399acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 400                       const unsigned long end)
 401{
 402        struct acpi_madt_interrupt_override *intsrc = NULL;
 403
 404        intsrc = (struct acpi_madt_interrupt_override *)header;
 405
 406        if (BAD_MADT_ENTRY(intsrc, end))
 407                return -EINVAL;
 408
 409        acpi_table_print_madt_entry(header);
 410
 411        if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 412                acpi_sci_ioapic_setup(intsrc->source_irq,
 413                                      intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 414                                      (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 415                                      intsrc->global_irq);
 416                return 0;
 417        }
 418
 419        if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 420                if (acpi_skip_timer_override) {
 421                        printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 422                        return 0;
 423                }
 424                if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 425                        intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 426                        printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 427                }
 428        }
 429
 430        mp_override_legacy_irq(intsrc->source_irq,
 431                                intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 432                                (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 433                                intsrc->global_irq);
 434
 435        return 0;
 436}
 437
 438static int __init
 439acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 440{
 441        struct acpi_madt_nmi_source *nmi_src = NULL;
 442
 443        nmi_src = (struct acpi_madt_nmi_source *)header;
 444
 445        if (BAD_MADT_ENTRY(nmi_src, end))
 446                return -EINVAL;
 447
 448        acpi_table_print_madt_entry(header);
 449
 450        /* TBD: Support nimsrc entries? */
 451
 452        return 0;
 453}
 454
 455#endif                          /* CONFIG_X86_IO_APIC */
 456
 457/*
 458 * acpi_pic_sci_set_trigger()
 459 *
 460 * use ELCR to set PIC-mode trigger type for SCI
 461 *
 462 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 463 * it may require Edge Trigger -- use "acpi_sci=edge"
 464 *
 465 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 466 * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 467 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 468 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 469 */
 470
 471void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 472{
 473        unsigned int mask = 1 << irq;
 474        unsigned int old, new;
 475
 476        /* Real old ELCR mask */
 477        old = inb(0x4d0) | (inb(0x4d1) << 8);
 478
 479        /*
 480         * If we use ACPI to set PCI IRQs, then we should clear ELCR
 481         * since we will set it correctly as we enable the PCI irq
 482         * routing.
 483         */
 484        new = acpi_noirq ? old : 0;
 485
 486        /*
 487         * Update SCI information in the ELCR, it isn't in the PCI
 488         * routing tables..
 489         */
 490        switch (trigger) {
 491        case 1:         /* Edge - clear */
 492                new &= ~mask;
 493                break;
 494        case 3:         /* Level - set */
 495                new |= mask;
 496                break;
 497        }
 498
 499        if (old == new)
 500                return;
 501
 502        printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 503        outb(new, 0x4d0);
 504        outb(new >> 8, 0x4d1);
 505}
 506
 507int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 508{
 509        *irq = gsi_to_irq(gsi);
 510
 511#ifdef CONFIG_X86_IO_APIC
 512        if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 513                setup_IO_APIC_irq_extra(gsi);
 514#endif
 515
 516        return 0;
 517}
 518EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 519
 520int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 521{
 522        if (isa_irq >= 16)
 523                return -1;
 524        *gsi = irq_to_gsi(isa_irq);
 525        return 0;
 526}
 527
 528static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 529                                 int trigger, int polarity)
 530{
 531#ifdef CONFIG_PCI
 532        /*
 533         * Make sure all (legacy) PCI IRQs are set as level-triggered.
 534         */
 535        if (trigger == ACPI_LEVEL_SENSITIVE)
 536                eisa_set_level_irq(gsi);
 537#endif
 538
 539        return gsi;
 540}
 541
 542static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 543                                    int trigger, int polarity)
 544{
 545#ifdef CONFIG_X86_IO_APIC
 546        gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 547#endif
 548
 549        return gsi;
 550}
 551
 552int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 553                           int trigger, int polarity) = acpi_register_gsi_pic;
 554
 555/*
 556 * success: return IRQ number (>=0)
 557 * failure: return < 0
 558 */
 559int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 560{
 561        unsigned int irq;
 562        unsigned int plat_gsi = gsi;
 563
 564        plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
 565        irq = gsi_to_irq(plat_gsi);
 566
 567        return irq;
 568}
 569
 570void __init acpi_set_irq_model_pic(void)
 571{
 572        acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 573        __acpi_register_gsi = acpi_register_gsi_pic;
 574        acpi_ioapic = 0;
 575}
 576
 577void __init acpi_set_irq_model_ioapic(void)
 578{
 579        acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 580        __acpi_register_gsi = acpi_register_gsi_ioapic;
 581        acpi_ioapic = 1;
 582}
 583
 584/*
 585 *  ACPI based hotplug support for CPU
 586 */
 587#ifdef CONFIG_ACPI_HOTPLUG_CPU
 588#include <acpi/processor.h>
 589
 590static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 591{
 592#ifdef CONFIG_ACPI_NUMA
 593        int nid;
 594
 595        nid = acpi_get_node(handle);
 596        if (nid == -1 || !node_online(nid))
 597                return;
 598        set_apicid_to_node(physid, nid);
 599        numa_set_node(cpu, nid);
 600#endif
 601}
 602
 603static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 604{
 605        struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 606        union acpi_object *obj;
 607        struct acpi_madt_local_apic *lapic;
 608        cpumask_var_t tmp_map, new_map;
 609        u8 physid;
 610        int cpu;
 611        int retval = -ENOMEM;
 612
 613        if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 614                return -EINVAL;
 615
 616        if (!buffer.length || !buffer.pointer)
 617                return -EINVAL;
 618
 619        obj = buffer.pointer;
 620        if (obj->type != ACPI_TYPE_BUFFER ||
 621            obj->buffer.length < sizeof(*lapic)) {
 622                kfree(buffer.pointer);
 623                return -EINVAL;
 624        }
 625
 626        lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 627
 628        if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 629            !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 630                kfree(buffer.pointer);
 631                return -EINVAL;
 632        }
 633
 634        physid = lapic->id;
 635
 636        kfree(buffer.pointer);
 637        buffer.length = ACPI_ALLOCATE_BUFFER;
 638        buffer.pointer = NULL;
 639
 640        if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 641                goto out;
 642
 643        if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 644                goto free_tmp_map;
 645
 646        cpumask_copy(tmp_map, cpu_present_mask);
 647        acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 648
 649        /*
 650         * If mp_register_lapic successfully generates a new logical cpu
 651         * number, then the following will get us exactly what was mapped
 652         */
 653        cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 654        if (cpumask_empty(new_map)) {
 655                printk ("Unable to map lapic to logical cpu number\n");
 656                retval = -EINVAL;
 657                goto free_new_map;
 658        }
 659
 660        acpi_processor_set_pdc(handle);
 661
 662        cpu = cpumask_first(new_map);
 663        acpi_map_cpu2node(handle, cpu, physid);
 664
 665        *pcpu = cpu;
 666        retval = 0;
 667
 668free_new_map:
 669        free_cpumask_var(new_map);
 670free_tmp_map:
 671        free_cpumask_var(tmp_map);
 672out:
 673        return retval;
 674}
 675
 676/* wrapper to silence section mismatch warning */
 677int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 678{
 679        return _acpi_map_lsapic(handle, pcpu);
 680}
 681EXPORT_SYMBOL(acpi_map_lsapic);
 682
 683int acpi_unmap_lsapic(int cpu)
 684{
 685        per_cpu(x86_cpu_to_apicid, cpu) = -1;
 686        set_cpu_present(cpu, false);
 687        num_processors--;
 688
 689        return (0);
 690}
 691
 692EXPORT_SYMBOL(acpi_unmap_lsapic);
 693#endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 694
 695int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 696{
 697        /* TBD */
 698        return -EINVAL;
 699}
 700
 701EXPORT_SYMBOL(acpi_register_ioapic);
 702
 703int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 704{
 705        /* TBD */
 706        return -EINVAL;
 707}
 708
 709EXPORT_SYMBOL(acpi_unregister_ioapic);
 710
 711static int __init acpi_parse_sbf(struct acpi_table_header *table)
 712{
 713        struct acpi_table_boot *sb;
 714
 715        sb = (struct acpi_table_boot *)table;
 716        if (!sb) {
 717                printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 718                return -ENODEV;
 719        }
 720
 721        sbf_port = sb->cmos_index;      /* Save CMOS port */
 722
 723        return 0;
 724}
 725
 726#ifdef CONFIG_HPET_TIMER
 727#include <asm/hpet.h>
 728
 729static struct __initdata resource *hpet_res;
 730
 731static int __init acpi_parse_hpet(struct acpi_table_header *table)
 732{
 733        struct acpi_table_hpet *hpet_tbl;
 734
 735        hpet_tbl = (struct acpi_table_hpet *)table;
 736        if (!hpet_tbl) {
 737                printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 738                return -ENODEV;
 739        }
 740
 741        if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 742                printk(KERN_WARNING PREFIX "HPET timers must be located in "
 743                       "memory.\n");
 744                return -1;
 745        }
 746
 747        hpet_address = hpet_tbl->address.address;
 748        hpet_blockid = hpet_tbl->sequence;
 749
 750        /*
 751         * Some broken BIOSes advertise HPET at 0x0. We really do not
 752         * want to allocate a resource there.
 753         */
 754        if (!hpet_address) {
 755                printk(KERN_WARNING PREFIX
 756                       "HPET id: %#x base: %#lx is invalid\n",
 757                       hpet_tbl->id, hpet_address);
 758                return 0;
 759        }
 760#ifdef CONFIG_X86_64
 761        /*
 762         * Some even more broken BIOSes advertise HPET at
 763         * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 764         * some noise:
 765         */
 766        if (hpet_address == 0xfed0000000000000UL) {
 767                if (!hpet_force_user) {
 768                        printk(KERN_WARNING PREFIX "HPET id: %#x "
 769                               "base: 0xfed0000000000000 is bogus\n "
 770                               "try hpet=force on the kernel command line to "
 771                               "fix it up to 0xfed00000.\n", hpet_tbl->id);
 772                        hpet_address = 0;
 773                        return 0;
 774                }
 775                printk(KERN_WARNING PREFIX
 776                       "HPET id: %#x base: 0xfed0000000000000 fixed up "
 777                       "to 0xfed00000.\n", hpet_tbl->id);
 778                hpet_address >>= 32;
 779        }
 780#endif
 781        printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 782               hpet_tbl->id, hpet_address);
 783
 784        /*
 785         * Allocate and initialize the HPET firmware resource for adding into
 786         * the resource tree during the lateinit timeframe.
 787         */
 788#define HPET_RESOURCE_NAME_SIZE 9
 789        hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 790
 791        hpet_res->name = (void *)&hpet_res[1];
 792        hpet_res->flags = IORESOURCE_MEM;
 793        snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 794                 hpet_tbl->sequence);
 795
 796        hpet_res->start = hpet_address;
 797        hpet_res->end = hpet_address + (1 * 1024) - 1;
 798
 799        return 0;
 800}
 801
 802/*
 803 * hpet_insert_resource inserts the HPET resources used into the resource
 804 * tree.
 805 */
 806static __init int hpet_insert_resource(void)
 807{
 808        if (!hpet_res)
 809                return 1;
 810
 811        return insert_resource(&iomem_resource, hpet_res);
 812}
 813
 814late_initcall(hpet_insert_resource);
 815
 816#else
 817#define acpi_parse_hpet NULL
 818#endif
 819
 820static int __init acpi_parse_fadt(struct acpi_table_header *table)
 821{
 822
 823#ifdef CONFIG_X86_PM_TIMER
 824        /* detect the location of the ACPI PM Timer */
 825        if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 826                /* FADT rev. 2 */
 827                if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 828                    ACPI_ADR_SPACE_SYSTEM_IO)
 829                        return 0;
 830
 831                pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 832                /*
 833                 * "X" fields are optional extensions to the original V1.0
 834                 * fields, so we must selectively expand V1.0 fields if the
 835                 * corresponding X field is zero.
 836                 */
 837                if (!pmtmr_ioport)
 838                        pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 839        } else {
 840                /* FADT rev. 1 */
 841                pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 842        }
 843        if (pmtmr_ioport)
 844                printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 845                       pmtmr_ioport);
 846#endif
 847        return 0;
 848}
 849
 850#ifdef  CONFIG_X86_LOCAL_APIC
 851/*
 852 * Parse LAPIC entries in MADT
 853 * returns 0 on success, < 0 on error
 854 */
 855
 856static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 857{
 858        int count;
 859
 860        if (!cpu_has_apic)
 861                return -ENODEV;
 862
 863        /*
 864         * Note that the LAPIC address is obtained from the MADT (32-bit value)
 865         * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 866         */
 867
 868        count =
 869            acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 870                                  acpi_parse_lapic_addr_ovr, 0);
 871        if (count < 0) {
 872                printk(KERN_ERR PREFIX
 873                       "Error parsing LAPIC address override entry\n");
 874                return count;
 875        }
 876
 877        register_lapic_address(acpi_lapic_addr);
 878
 879        return count;
 880}
 881
 882static int __init acpi_parse_madt_lapic_entries(void)
 883{
 884        int count;
 885        int x2count = 0;
 886
 887        if (!cpu_has_apic)
 888                return -ENODEV;
 889
 890        /*
 891         * Note that the LAPIC address is obtained from the MADT (32-bit value)
 892         * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 893         */
 894
 895        count =
 896            acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 897                                  acpi_parse_lapic_addr_ovr, 0);
 898        if (count < 0) {
 899                printk(KERN_ERR PREFIX
 900                       "Error parsing LAPIC address override entry\n");
 901                return count;
 902        }
 903
 904        register_lapic_address(acpi_lapic_addr);
 905
 906        count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 907                                      acpi_parse_sapic, MAX_LOCAL_APIC);
 908
 909        if (!count) {
 910                x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 911                                        acpi_parse_x2apic, MAX_LOCAL_APIC);
 912                count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 913                                        acpi_parse_lapic, MAX_LOCAL_APIC);
 914        }
 915        if (!count && !x2count) {
 916                printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 917                /* TBD: Cleanup to allow fallback to MPS */
 918                return -ENODEV;
 919        } else if (count < 0 || x2count < 0) {
 920                printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 921                /* TBD: Cleanup to allow fallback to MPS */
 922                return count;
 923        }
 924
 925        x2count =
 926            acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 927                                  acpi_parse_x2apic_nmi, 0);
 928        count =
 929            acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 930        if (count < 0 || x2count < 0) {
 931                printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 932                /* TBD: Cleanup to allow fallback to MPS */
 933                return count;
 934        }
 935        return 0;
 936}
 937#endif                          /* CONFIG_X86_LOCAL_APIC */
 938
 939#ifdef  CONFIG_X86_IO_APIC
 940#define MP_ISA_BUS              0
 941
 942#ifdef CONFIG_X86_ES7000
 943extern int es7000_plat;
 944#endif
 945
 946void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 947{
 948        int ioapic;
 949        int pin;
 950        struct mpc_intsrc mp_irq;
 951
 952        /*
 953         * Convert 'gsi' to 'ioapic.pin'.
 954         */
 955        ioapic = mp_find_ioapic(gsi);
 956        if (ioapic < 0)
 957                return;
 958        pin = mp_find_ioapic_pin(ioapic, gsi);
 959
 960        /*
 961         * TBD: This check is for faulty timer entries, where the override
 962         *      erroneously sets the trigger to level, resulting in a HUGE
 963         *      increase of timer interrupts!
 964         */
 965        if ((bus_irq == 0) && (trigger == 3))
 966                trigger = 1;
 967
 968        mp_irq.type = MP_INTSRC;
 969        mp_irq.irqtype = mp_INT;
 970        mp_irq.irqflag = (trigger << 2) | polarity;
 971        mp_irq.srcbus = MP_ISA_BUS;
 972        mp_irq.srcbusirq = bus_irq;     /* IRQ */
 973        mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
 974        mp_irq.dstirq = pin;    /* INTIN# */
 975
 976        mp_save_irq(&mp_irq);
 977
 978        isa_irq_to_gsi[bus_irq] = gsi;
 979}
 980
 981void __init mp_config_acpi_legacy_irqs(void)
 982{
 983        int i;
 984        struct mpc_intsrc mp_irq;
 985
 986#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 987        /*
 988         * Fabricate the legacy ISA bus (bus #31).
 989         */
 990        mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 991#endif
 992        set_bit(MP_ISA_BUS, mp_bus_not_pci);
 993        pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
 994
 995#ifdef CONFIG_X86_ES7000
 996        /*
 997         * Older generations of ES7000 have no legacy identity mappings
 998         */
 999        if (es7000_plat == 1)
1000                return;
1001#endif
1002
1003        /*
1004         * Use the default configuration for the IRQs 0-15.  Unless
1005         * overridden by (MADT) interrupt source override entries.
1006         */
1007        for (i = 0; i < 16; i++) {
1008                int ioapic, pin;
1009                unsigned int dstapic;
1010                int idx;
1011                u32 gsi;
1012
1013                /* Locate the gsi that irq i maps to. */
1014                if (acpi_isa_irq_to_gsi(i, &gsi))
1015                        continue;
1016
1017                /*
1018                 * Locate the IOAPIC that manages the ISA IRQ.
1019                 */
1020                ioapic = mp_find_ioapic(gsi);
1021                if (ioapic < 0)
1022                        continue;
1023                pin = mp_find_ioapic_pin(ioapic, gsi);
1024                dstapic = mpc_ioapic_id(ioapic);
1025
1026                for (idx = 0; idx < mp_irq_entries; idx++) {
1027                        struct mpc_intsrc *irq = mp_irqs + idx;
1028
1029                        /* Do we already have a mapping for this ISA IRQ? */
1030                        if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1031                                break;
1032
1033                        /* Do we already have a mapping for this IOAPIC pin */
1034                        if (irq->dstapic == dstapic && irq->dstirq == pin)
1035                                break;
1036                }
1037
1038                if (idx != mp_irq_entries) {
1039                        printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1040                        continue;       /* IRQ already used */
1041                }
1042
1043                mp_irq.type = MP_INTSRC;
1044                mp_irq.irqflag = 0;     /* Conforming */
1045                mp_irq.srcbus = MP_ISA_BUS;
1046                mp_irq.dstapic = dstapic;
1047                mp_irq.irqtype = mp_INT;
1048                mp_irq.srcbusirq = i; /* Identity mapped */
1049                mp_irq.dstirq = pin;
1050
1051                mp_save_irq(&mp_irq);
1052        }
1053}
1054
1055static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1056                        int polarity)
1057{
1058#ifdef CONFIG_X86_MPPARSE
1059        struct mpc_intsrc mp_irq;
1060        struct pci_dev *pdev;
1061        unsigned char number;
1062        unsigned int devfn;
1063        int ioapic;
1064        u8 pin;
1065
1066        if (!acpi_ioapic)
1067                return 0;
1068        if (!dev)
1069                return 0;
1070        if (dev->bus != &pci_bus_type)
1071                return 0;
1072
1073        pdev = to_pci_dev(dev);
1074        number = pdev->bus->number;
1075        devfn = pdev->devfn;
1076        pin = pdev->pin;
1077        /* print the entry should happen on mptable identically */
1078        mp_irq.type = MP_INTSRC;
1079        mp_irq.irqtype = mp_INT;
1080        mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1081                                (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1082        mp_irq.srcbus = number;
1083        mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1084        ioapic = mp_find_ioapic(gsi);
1085        mp_irq.dstapic = mpc_ioapic_id(ioapic);
1086        mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1087
1088        mp_save_irq(&mp_irq);
1089#endif
1090        return 0;
1091}
1092
1093int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1094{
1095        int ioapic;
1096        int ioapic_pin;
1097        struct io_apic_irq_attr irq_attr;
1098
1099        if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1100                return gsi;
1101
1102        /* Don't set up the ACPI SCI because it's already set up */
1103        if (acpi_gbl_FADT.sci_interrupt == gsi)
1104                return gsi;
1105
1106        ioapic = mp_find_ioapic(gsi);
1107        if (ioapic < 0) {
1108                printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1109                return gsi;
1110        }
1111
1112        ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1113
1114        if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1115                printk(KERN_ERR "Invalid reference to IOAPIC pin "
1116                       "%d-%d\n", mpc_ioapic_id(ioapic),
1117                       ioapic_pin);
1118                return gsi;
1119        }
1120
1121        if (enable_update_mptable)
1122                mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1123
1124        set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1125                             trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1126                             polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1127        io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1128
1129        return gsi;
1130}
1131
1132/*
1133 * Parse IOAPIC related entries in MADT
1134 * returns 0 on success, < 0 on error
1135 */
1136static int __init acpi_parse_madt_ioapic_entries(void)
1137{
1138        int count;
1139
1140        /*
1141         * ACPI interpreter is required to complete interrupt setup,
1142         * so if it is off, don't enumerate the io-apics with ACPI.
1143         * If MPS is present, it will handle them,
1144         * otherwise the system will stay in PIC mode
1145         */
1146        if (acpi_disabled || acpi_noirq)
1147                return -ENODEV;
1148
1149        if (!cpu_has_apic)
1150                return -ENODEV;
1151
1152        /*
1153         * if "noapic" boot option, don't look for IO-APICs
1154         */
1155        if (skip_ioapic_setup) {
1156                printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1157                       "due to 'noapic' option.\n");
1158                return -ENODEV;
1159        }
1160
1161        count =
1162            acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1163                                  MAX_IO_APICS);
1164        if (!count) {
1165                printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1166                return -ENODEV;
1167        } else if (count < 0) {
1168                printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1169                return count;
1170        }
1171
1172        count =
1173            acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1174                                  nr_irqs);
1175        if (count < 0) {
1176                printk(KERN_ERR PREFIX
1177                       "Error parsing interrupt source overrides entry\n");
1178                /* TBD: Cleanup to allow fallback to MPS */
1179                return count;
1180        }
1181
1182        /*
1183         * If BIOS did not supply an INT_SRC_OVR for the SCI
1184         * pretend we got one so we can set the SCI flags.
1185         */
1186        if (!acpi_sci_override_gsi)
1187                acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1188                                      acpi_gbl_FADT.sci_interrupt);
1189
1190        /* Fill in identity legacy mappings where no override */
1191        mp_config_acpi_legacy_irqs();
1192
1193        count =
1194            acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1195                                  nr_irqs);
1196        if (count < 0) {
1197                printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1198                /* TBD: Cleanup to allow fallback to MPS */
1199                return count;
1200        }
1201
1202        return 0;
1203}
1204#else
1205static inline int acpi_parse_madt_ioapic_entries(void)
1206{
1207        return -1;
1208}
1209#endif  /* !CONFIG_X86_IO_APIC */
1210
1211static void __init early_acpi_process_madt(void)
1212{
1213#ifdef CONFIG_X86_LOCAL_APIC
1214        int error;
1215
1216        if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1217
1218                /*
1219                 * Parse MADT LAPIC entries
1220                 */
1221                error = early_acpi_parse_madt_lapic_addr_ovr();
1222                if (!error) {
1223                        acpi_lapic = 1;
1224                        smp_found_config = 1;
1225                }
1226                if (error == -EINVAL) {
1227                        /*
1228                         * Dell Precision Workstation 410, 610 come here.
1229                         */
1230                        printk(KERN_ERR PREFIX
1231                               "Invalid BIOS MADT, disabling ACPI\n");
1232                        disable_acpi();
1233                }
1234        }
1235#endif
1236}
1237
1238static void __init acpi_process_madt(void)
1239{
1240#ifdef CONFIG_X86_LOCAL_APIC
1241        int error;
1242
1243        if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1244
1245                /*
1246                 * Parse MADT LAPIC entries
1247                 */
1248                error = acpi_parse_madt_lapic_entries();
1249                if (!error) {
1250                        acpi_lapic = 1;
1251
1252                        /*
1253                         * Parse MADT IO-APIC entries
1254                         */
1255                        error = acpi_parse_madt_ioapic_entries();
1256                        if (!error) {
1257                                acpi_set_irq_model_ioapic();
1258
1259                                smp_found_config = 1;
1260                        }
1261                }
1262                if (error == -EINVAL) {
1263                        /*
1264                         * Dell Precision Workstation 410, 610 come here.
1265                         */
1266                        printk(KERN_ERR PREFIX
1267                               "Invalid BIOS MADT, disabling ACPI\n");
1268                        disable_acpi();
1269                }
1270        } else {
1271                /*
1272                 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1273                 * In the event an MPS table was found, forget it.
1274                 * Boot with "acpi=off" to use MPS on such a system.
1275                 */
1276                if (smp_found_config) {
1277                        printk(KERN_WARNING PREFIX
1278                                "No APIC-table, disabling MPS\n");
1279                        smp_found_config = 0;
1280                }
1281        }
1282
1283        /*
1284         * ACPI supports both logical (e.g. Hyper-Threading) and physical
1285         * processors, where MPS only supports physical.
1286         */
1287        if (acpi_lapic && acpi_ioapic)
1288                printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1289                       "information\n");
1290        else if (acpi_lapic)
1291                printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1292                       "configuration information\n");
1293#endif
1294        return;
1295}
1296
1297static int __init disable_acpi_irq(const struct dmi_system_id *d)
1298{
1299        if (!acpi_force) {
1300                printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1301                       d->ident);
1302                acpi_noirq_set();
1303        }
1304        return 0;
1305}
1306
1307static int __init disable_acpi_pci(const struct dmi_system_id *d)
1308{
1309        if (!acpi_force) {
1310                printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1311                       d->ident);
1312                acpi_disable_pci();
1313        }
1314        return 0;
1315}
1316
1317static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1318{
1319        if (!acpi_force) {
1320                printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1321                disable_acpi();
1322        } else {
1323                printk(KERN_NOTICE
1324                       "Warning: DMI blacklist says broken, but acpi forced\n");
1325        }
1326        return 0;
1327}
1328
1329/*
1330 * Force ignoring BIOS IRQ0 pin2 override
1331 */
1332static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1333{
1334        /*
1335         * The ati_ixp4x0_rev() early PCI quirk should have set
1336         * the acpi_skip_timer_override flag already:
1337         */
1338        if (!acpi_skip_timer_override) {
1339                WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1340                pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1341                        d->ident);
1342                acpi_skip_timer_override = 1;
1343        }
1344        return 0;
1345}
1346
1347/*
1348 * If your system is blacklisted here, but you find that acpi=force
1349 * works for you, please contact linux-acpi@vger.kernel.org
1350 */
1351static struct dmi_system_id __initdata acpi_dmi_table[] = {
1352        /*
1353         * Boxes that need ACPI disabled
1354         */
1355        {
1356         .callback = dmi_disable_acpi,
1357         .ident = "IBM Thinkpad",
1358         .matches = {
1359                     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1360                     DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1361                     },
1362         },
1363
1364        /*
1365         * Boxes that need ACPI PCI IRQ routing disabled
1366         */
1367        {
1368         .callback = disable_acpi_irq,
1369         .ident = "ASUS A7V",
1370         .matches = {
1371                     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1372                     DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1373                     /* newer BIOS, Revision 1011, does work */
1374                     DMI_MATCH(DMI_BIOS_VERSION,
1375                               "ASUS A7V ACPI BIOS Revision 1007"),
1376                     },
1377         },
1378        {
1379                /*
1380                 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1381                 * for LPC bridge, which is needed for the PCI
1382                 * interrupt links to work. DSDT fix is in bug 5966.
1383                 * 2645, 2646 model numbers are shared with 600/600E/600X
1384                 */
1385         .callback = disable_acpi_irq,
1386         .ident = "IBM Thinkpad 600 Series 2645",
1387         .matches = {
1388                     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1389                     DMI_MATCH(DMI_BOARD_NAME, "2645"),
1390                     },
1391         },
1392        {
1393         .callback = disable_acpi_irq,
1394         .ident = "IBM Thinkpad 600 Series 2646",
1395         .matches = {
1396                     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1397                     DMI_MATCH(DMI_BOARD_NAME, "2646"),
1398                     },
1399         },
1400        /*
1401         * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1402         */
1403        {                       /* _BBN 0 bug */
1404         .callback = disable_acpi_pci,
1405         .ident = "ASUS PR-DLS",
1406         .matches = {
1407                     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1408                     DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1409                     DMI_MATCH(DMI_BIOS_VERSION,
1410                               "ASUS PR-DLS ACPI BIOS Revision 1010"),
1411                     DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1412                     },
1413         },
1414        {
1415         .callback = disable_acpi_pci,
1416         .ident = "Acer TravelMate 36x Laptop",
1417         .matches = {
1418                     DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1419                     DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1420                     },
1421         },
1422        {}
1423};
1424
1425/* second table for DMI checks that should run after early-quirks */
1426static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1427        /*
1428         * HP laptops which use a DSDT reporting as HP/SB400/10000,
1429         * which includes some code which overrides all temperature
1430         * trip points to 16C if the INTIN2 input of the I/O APIC
1431         * is enabled.  This input is incorrectly designated the
1432         * ISA IRQ 0 via an interrupt source override even though
1433         * it is wired to the output of the master 8259A and INTIN0
1434         * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1435         * override in that cases.
1436         */
1437        {
1438         .callback = dmi_ignore_irq0_timer_override,
1439         .ident = "HP nx6115 laptop",
1440         .matches = {
1441                     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1442                     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1443                     },
1444         },
1445        {
1446         .callback = dmi_ignore_irq0_timer_override,
1447         .ident = "HP NX6125 laptop",
1448         .matches = {
1449                     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1450                     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1451                     },
1452         },
1453        {
1454         .callback = dmi_ignore_irq0_timer_override,
1455         .ident = "HP NX6325 laptop",
1456         .matches = {
1457                     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1458                     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1459                     },
1460         },
1461        {
1462         .callback = dmi_ignore_irq0_timer_override,
1463         .ident = "HP 6715b laptop",
1464         .matches = {
1465                     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1466                     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1467                     },
1468         },
1469        {}
1470};
1471
1472/*
1473 * acpi_boot_table_init() and acpi_boot_init()
1474 *  called from setup_arch(), always.
1475 *      1. checksums all tables
1476 *      2. enumerates lapics
1477 *      3. enumerates io-apics
1478 *
1479 * acpi_table_init() is separate to allow reading SRAT without
1480 * other side effects.
1481 *
1482 * side effects of acpi_boot_init:
1483 *      acpi_lapic = 1 if LAPIC found
1484 *      acpi_ioapic = 1 if IOAPIC found
1485 *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1486 *      if acpi_blacklisted() acpi_disabled = 1;
1487 *      acpi_irq_model=...
1488 *      ...
1489 */
1490
1491void __init acpi_boot_table_init(void)
1492{
1493        dmi_check_system(acpi_dmi_table);
1494
1495        /*
1496         * If acpi_disabled, bail out
1497         */
1498        if (acpi_disabled)
1499                return; 
1500
1501        /*
1502         * Initialize the ACPI boot-time table parser.
1503         */
1504        if (acpi_table_init()) {
1505                disable_acpi();
1506                return;
1507        }
1508
1509        acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1510
1511        /*
1512         * blacklist may disable ACPI entirely
1513         */
1514        if (acpi_blacklisted()) {
1515                if (acpi_force) {
1516                        printk(KERN_WARNING PREFIX "acpi=force override\n");
1517                } else {
1518                        printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1519                        disable_acpi();
1520                        return;
1521                }
1522        }
1523}
1524
1525int __init early_acpi_boot_init(void)
1526{
1527        /*
1528         * If acpi_disabled, bail out
1529         */
1530        if (acpi_disabled)
1531                return 1;
1532
1533        /*
1534         * Process the Multiple APIC Description Table (MADT), if present
1535         */
1536        early_acpi_process_madt();
1537
1538        return 0;
1539}
1540
1541int __init acpi_boot_init(void)
1542{
1543        /* those are executed after early-quirks are executed */
1544        dmi_check_system(acpi_dmi_table_late);
1545
1546        /*
1547         * If acpi_disabled, bail out
1548         */
1549        if (acpi_disabled)
1550                return 1;
1551
1552        acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1553
1554        /*
1555         * set sci_int and PM timer address
1556         */
1557        acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1558
1559        /*
1560         * Process the Multiple APIC Description Table (MADT), if present
1561         */
1562        acpi_process_madt();
1563
1564        acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1565
1566        if (!acpi_noirq)
1567                x86_init.pci.init = pci_acpi_init;
1568
1569        return 0;
1570}
1571
1572static int __init parse_acpi(char *arg)
1573{
1574        if (!arg)
1575                return -EINVAL;
1576
1577        /* "acpi=off" disables both ACPI table parsing and interpreter */
1578        if (strcmp(arg, "off") == 0) {
1579                disable_acpi();
1580        }
1581        /* acpi=force to over-ride black-list */
1582        else if (strcmp(arg, "force") == 0) {
1583                acpi_force = 1;
1584                acpi_disabled = 0;
1585        }
1586        /* acpi=strict disables out-of-spec workarounds */
1587        else if (strcmp(arg, "strict") == 0) {
1588                acpi_strict = 1;
1589        }
1590        /* acpi=rsdt use RSDT instead of XSDT */
1591        else if (strcmp(arg, "rsdt") == 0) {
1592                acpi_rsdt_forced = 1;
1593        }
1594        /* "acpi=noirq" disables ACPI interrupt routing */
1595        else if (strcmp(arg, "noirq") == 0) {
1596                acpi_noirq_set();
1597        }
1598        /* "acpi=copy_dsdt" copys DSDT */
1599        else if (strcmp(arg, "copy_dsdt") == 0) {
1600                acpi_gbl_copy_dsdt_locally = 1;
1601        } else {
1602                /* Core will printk when we return error. */
1603                return -EINVAL;
1604        }
1605        return 0;
1606}
1607early_param("acpi", parse_acpi);
1608
1609/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1610static int __init parse_pci(char *arg)
1611{
1612        if (arg && strcmp(arg, "noacpi") == 0)
1613                acpi_disable_pci();
1614        return 0;
1615}
1616early_param("pci", parse_pci);
1617
1618int __init acpi_mps_check(void)
1619{
1620#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1621/* mptable code is not built-in*/
1622        if (acpi_disabled || acpi_noirq) {
1623                printk(KERN_WARNING "MPS support code is not built-in.\n"
1624                       "Using acpi=off or acpi=noirq or pci=noacpi "
1625                       "may have problem\n");
1626                return 1;
1627        }
1628#endif
1629        return 0;
1630}
1631
1632#ifdef CONFIG_X86_IO_APIC
1633static int __init parse_acpi_skip_timer_override(char *arg)
1634{
1635        acpi_skip_timer_override = 1;
1636        return 0;
1637}
1638early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1639
1640static int __init parse_acpi_use_timer_override(char *arg)
1641{
1642        acpi_use_timer_override = 1;
1643        return 0;
1644}
1645early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1646#endif /* CONFIG_X86_IO_APIC */
1647
1648static int __init setup_acpi_sci(char *s)
1649{
1650        if (!s)
1651                return -EINVAL;
1652        if (!strcmp(s, "edge"))
1653                acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1654                        (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1655        else if (!strcmp(s, "level"))
1656                acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1657                        (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1658        else if (!strcmp(s, "high"))
1659                acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1660                        (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1661        else if (!strcmp(s, "low"))
1662                acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1663                        (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1664        else
1665                return -EINVAL;
1666        return 0;
1667}
1668early_param("acpi_sci", setup_acpi_sci);
1669
1670int __acpi_acquire_global_lock(unsigned int *lock)
1671{
1672        unsigned int old, new, val;
1673        do {
1674                old = *lock;
1675                new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1676                val = cmpxchg(lock, old, new);
1677        } while (unlikely (val != old));
1678        return (new < 3) ? -1 : 0;
1679}
1680
1681int __acpi_release_global_lock(unsigned int *lock)
1682{
1683        unsigned int old, new, val;
1684        do {
1685                old = *lock;
1686                new = old & ~0x3;
1687                val = cmpxchg(lock, old, new);
1688        } while (unlikely (val != old));
1689        return old & 0x1;
1690}
1691