arch/ia64/kernel/irq_ia64.c

   1 /*
   2  * linux/arch/ia64/kernel/irq_ia64.c
   3  *
   4  * Copyright (C) 1998-2001 Hewlett-Packard Co
   5  *      Stephane Eranian <eranian@hpl.hp.com>
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  *
   8  *  6/10/99: Updated to bring in sync with x86 version to facilitate
   9  *           support for SMP and different interrupt controllers.
  10  *
  11  * 09/15/00 Goutham Rao <goutham.rao@intel.com> Implemented pci_irq_to_vector
  12  *                      PCI to vector allocation routine.
  13  * 04/14/2004 Ashok Raj <ashok.raj@intel.com>
  14  *                                              Added CPU Hotplug handling for IPF.
  15  */
  16
  17 #include <linux/module.h>
  18
  19 #include <linux/jiffies.h>
  20 #include <linux/errno.h>
  21 #include <linux/init.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/ioport.h>
  24 #include <linux/kernel_stat.h>
  25 #include <linux/ptrace.h>
  26 #include <linux/random.h>       /* for rand_initialize_irq() */
  27 #include <linux/signal.h>
  28 #include <linux/smp.h>
  29 #include <linux/threads.h>
  30 #include <linux/bitops.h>
  31 #include <linux/irq.h>
  32 #include <linux/ratelimit.h>
  33 #include <linux/acpi.h>
  34 #include <linux/sched.h>
  35
  36 #include <asm/delay.h>
  37 #include <asm/intrinsics.h>
  38 #include <asm/io.h>
  39 #include <asm/hw_irq.h>
  40 #include <asm/machvec.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/system.h>
  43 #include <asm/tlbflush.h>
  44
  45 #ifdef CONFIG_PERFMON
  46 # include <asm/perfmon.h>
  47 #endif
  48
  49 #define IRQ_DEBUG       0
  50
  51 #define IRQ_VECTOR_UNASSIGNED   (0)
  52
  53 #define IRQ_UNUSED              (0)
  54 #define IRQ_USED                (1)
  55 #define IRQ_RSVD                (2)
  56
  57 /* These can be overridden in platform_irq_init */
  58 int ia64_first_device_vector = IA64_DEF_FIRST_DEVICE_VECTOR;
  59 int ia64_last_device_vector = IA64_DEF_LAST_DEVICE_VECTOR;
  60
  61 /* default base addr of IPI table */
  62 void __iomem *ipi_base_addr = ((void __iomem *)
  63                                (__IA64_UNCACHED_OFFSET | IA64_IPI_DEFAULT_BASE_ADDR));
  64
  65 static cpumask_t vector_allocation_domain(int cpu);
  66
  67 /*
  68  * Legacy IRQ to IA-64 vector translation table.
  69  */
  70 __u8 isa_irq_to_vector_map[16] = {
  71         /* 8259 IRQ translation, first 16 entries */
  72         0x2f, 0x20, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29,
  73         0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21
  74 };
  75 EXPORT_SYMBOL(isa_irq_to_vector_map);
  76
  77 DEFINE_SPINLOCK(vector_lock);
  78
  79 struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
  80         [0 ... NR_IRQS - 1] = {
  81                 .vector = IRQ_VECTOR_UNASSIGNED,
  82                 .domain = CPU_MASK_NONE
  83         }
  84 };
  85
  86 DEFINE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq) = {
  87         [0 ... IA64_NUM_VECTORS - 1] = -1
  88 };
  89
  90 static cpumask_t vector_table[IA64_NUM_VECTORS] = {
  91         [0 ... IA64_NUM_VECTORS - 1] = CPU_MASK_NONE
  92 };
  93
  94 static int irq_status[NR_IRQS] = {
  95         [0 ... NR_IRQS -1] = IRQ_UNUSED
  96 };
  97
  98 int check_irq_used(int irq)
  99 {
 100         if (irq_status[irq] == IRQ_USED)
 101                 return 1;
 102
 103         return -1;
 104 }
 105
 106 static inline int find_unassigned_irq(void)
 107 {
 108         int irq;
 109
 110         for (irq = IA64_FIRST_DEVICE_VECTOR; irq < NR_IRQS; irq++)
 111                 if (irq_status[irq] == IRQ_UNUSED)
 112                         return irq;
 113         return -ENOSPC;
 114 }
 115
 116 static inline int find_unassigned_vector(cpumask_t domain)
 117 {
 118         cpumask_t mask;
 119         int pos, vector;
 120
 121         cpus_and(mask, domain, cpu_online_map);
 122         if (cpus_empty(mask))
 123                 return -EINVAL;
 124
 125         for (pos = 0; pos < IA64_NUM_DEVICE_VECTORS; pos++) {
 126                 vector = IA64_FIRST_DEVICE_VECTOR + pos;
 127                 cpus_and(mask, domain, vector_table[vector]);
 128                 if (!cpus_empty(mask))
 129                         continue;
 130                 return vector;
 131         }
 132         return -ENOSPC;
 133 }
 134
 135 static int __bind_irq_vector(int irq, int vector, cpumask_t domain)
 136 {
 137         cpumask_t mask;
 138         int cpu;
 139         struct irq_cfg *cfg = &irq_cfg[irq];
 140
 141         BUG_ON((unsigned)irq >= NR_IRQS);
 142         BUG_ON((unsigned)vector >= IA64_NUM_VECTORS);
 143
 144         cpus_and(mask, domain, cpu_online_map);
 145         if (cpus_empty(mask))
 146                 return -EINVAL;
 147         if ((cfg->vector == vector) && cpus_equal(cfg->domain, domain))
 148                 return 0;
 149         if (cfg->vector != IRQ_VECTOR_UNASSIGNED)
 150                 return -EBUSY;
 151         for_each_cpu_mask(cpu, mask)
 152                 per_cpu(vector_irq, cpu)[vector] = irq;
 153         cfg->vector = vector;
 154         cfg->domain = domain;
 155         irq_status[irq] = IRQ_USED;
 156         cpus_or(vector_table[vector], vector_table[vector], domain);
 157         return 0;
 158 }
 159
 160 int bind_irq_vector(int irq, int vector, cpumask_t domain)
 161 {
 162         unsigned long flags;
 163         int ret;
 164
 165         spin_lock_irqsave(&vector_lock, flags);
 166         ret = __bind_irq_vector(irq, vector, domain);
 167         spin_unlock_irqrestore(&vector_lock, flags);
 168         return ret;
 169 }
 170
 171 static void __clear_irq_vector(int irq)
 172 {
 173         int vector, cpu;
 174         cpumask_t mask;
 175         cpumask_t domain;
 176         struct irq_cfg *cfg = &irq_cfg[irq];
 177
 178         BUG_ON((unsigned)irq >= NR_IRQS);
 179         BUG_ON(cfg->vector == IRQ_VECTOR_UNASSIGNED);
 180         vector = cfg->vector;
 181         domain = cfg->domain;
 182         cpus_and(mask, cfg->domain, cpu_online_map);
 183         for_each_cpu_mask(cpu, mask)
 184                 per_cpu(vector_irq, cpu)[vector] = -1;
 185         cfg->vector = IRQ_VECTOR_UNASSIGNED;
 186         cfg->domain = CPU_MASK_NONE;
 187         irq_status[irq] = IRQ_UNUSED;
 188         cpus_andnot(vector_table[vector], vector_table[vector], domain);
 189 }
 190
 191 static void clear_irq_vector(int irq)
 192 {
 193         unsigned long flags;
 194
 195         spin_lock_irqsave(&vector_lock, flags);
 196         __clear_irq_vector(irq);
 197         spin_unlock_irqrestore(&vector_lock, flags);
 198 }
 199
 200 int
 201 ia64_native_assign_irq_vector (int irq)
 202 {
 203         unsigned long flags;
 204         int vector, cpu;
 205         cpumask_t domain = CPU_MASK_NONE;
 206
 207         vector = -ENOSPC;
 208
 209         spin_lock_irqsave(&vector_lock, flags);
 210         for_each_online_cpu(cpu) {
 211                 domain = vector_allocation_domain(cpu);
 212                 vector = find_unassigned_vector(domain);
 213                 if (vector >= 0)
 214                         break;
 215         }
 216         if (vector < 0)
 217                 goto out;
 218         if (irq == AUTO_ASSIGN)
 219                 irq = vector;
 220         BUG_ON(__bind_irq_vector(irq, vector, domain));
 221  out:
 222         spin_unlock_irqrestore(&vector_lock, flags);
 223         return vector;
 224 }
 225
 226 void
 227 ia64_native_free_irq_vector (int vector)
 228 {
 229         if (vector < IA64_FIRST_DEVICE_VECTOR ||
 230             vector > IA64_LAST_DEVICE_VECTOR)
 231                 return;
 232         clear_irq_vector(vector);
 233 }
 234
 235 int
 236 reserve_irq_vector (int vector)
 237 {
 238         if (vector < IA64_FIRST_DEVICE_VECTOR ||
 239             vector > IA64_LAST_DEVICE_VECTOR)
 240                 return -EINVAL;
 241         return !!bind_irq_vector(vector, vector, CPU_MASK_ALL);
 242 }
 243
 244 /*
 245  * Initialize vector_irq on a new cpu. This function must be called
 246  * with vector_lock held.
 247  */
 248 void __setup_vector_irq(int cpu)
 249 {
 250         int irq, vector;
 251
 252         /* Clear vector_irq */
 253         for (vector = 0; vector < IA64_NUM_VECTORS; ++vector)
 254                 per_cpu(vector_irq, cpu)[vector] = -1;
 255         /* Mark the inuse vectors */
 256         for (irq = 0; irq < NR_IRQS; ++irq) {
 257                 if (!cpu_isset(cpu, irq_cfg[irq].domain))
 258                         continue;
 259                 vector = irq_to_vector(irq);
 260                 per_cpu(vector_irq, cpu)[vector] = irq;
 261         }
 262 }
 263
 264 #if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG))
 265
 266 static enum vector_domain_type {
 267         VECTOR_DOMAIN_NONE,
 268         VECTOR_DOMAIN_PERCPU
 269 } vector_domain_type = VECTOR_DOMAIN_NONE;
 270
 271 static cpumask_t vector_allocation_domain(int cpu)
 272 {
 273         if (vector_domain_type == VECTOR_DOMAIN_PERCPU)
 274                 return cpumask_of_cpu(cpu);
 275         return CPU_MASK_ALL;
 276 }
 277
 278 static int __irq_prepare_move(int irq, int cpu)
 279 {
 280         struct irq_cfg *cfg = &irq_cfg[irq];
 281         int vector;
 282         cpumask_t domain;
 283
 284         if (cfg->move_in_progress || cfg->move_cleanup_count)
 285                 return -EBUSY;
 286         if (cfg->vector == IRQ_VECTOR_UNASSIGNED || !cpu_online(cpu))
 287                 return -EINVAL;
 288         if (cpu_isset(cpu, cfg->domain))
 289                 return 0;
 290         domain = vector_allocation_domain(cpu);
 291         vector = find_unassigned_vector(domain);
 292         if (vector < 0)
 293                 return -ENOSPC;
 294         cfg->move_in_progress = 1;
 295         cfg->old_domain = cfg->domain;
 296         cfg->vector = IRQ_VECTOR_UNASSIGNED;
 297         cfg->domain = CPU_MASK_NONE;
 298         BUG_ON(__bind_irq_vector(irq, vector, domain));
 299         return 0;
 300 }
 301
 302 int irq_prepare_move(int irq, int cpu)
 303 {
 304         unsigned long flags;
 305         int ret;
 306
 307         spin_lock_irqsave(&vector_lock, flags);
 308         ret = __irq_prepare_move(irq, cpu);
 309         spin_unlock_irqrestore(&vector_lock, flags);
 310         return ret;
 311 }
 312
 313 void irq_complete_move(unsigned irq)
 314 {
 315         struct irq_cfg *cfg = &irq_cfg[irq];
 316         cpumask_t cleanup_mask;
 317         int i;
 318
 319         if (likely(!cfg->move_in_progress))
 320                 return;
 321
 322         if (unlikely(cpu_isset(smp_processor_id(), cfg->old_domain)))
 323                 return;
 324
 325         cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map);
 326         cfg->move_cleanup_count = cpus_weight(cleanup_mask);
 327         for_each_cpu_mask(i, cleanup_mask)
 328                 platform_send_ipi(i, IA64_IRQ_MOVE_VECTOR, IA64_IPI_DM_INT, 0);
 329         cfg->move_in_progress = 0;
 330 }
 331
 332 static irqreturn_t smp_irq_move_cleanup_interrupt(int irq, void *dev_id)
 333 {
 334         int me = smp_processor_id();
 335         ia64_vector vector;
 336         unsigned long flags;
 337
 338         for (vector = IA64_FIRST_DEVICE_VECTOR;
 339              vector < IA64_LAST_DEVICE_VECTOR; vector++) {
 340                 int irq;
 341                 struct irq_desc *desc;
 342                 struct irq_cfg *cfg;
 343                 irq = __get_cpu_var(vector_irq)[vector];
 344                 if (irq < 0)
 345                         continue;
 346
 347                 desc = irq_to_desc(irq);
 348                 cfg = irq_cfg + irq;
 349                 raw_spin_lock(&desc->lock);
 350                 if (!cfg->move_cleanup_count)
 351                         goto unlock;
 352
 353                 if (!cpu_isset(me, cfg->old_domain))
 354                         goto unlock;
 355
 356                 spin_lock_irqsave(&vector_lock, flags);
 357                 __get_cpu_var(vector_irq)[vector] = -1;
 358                 cpu_clear(me, vector_table[vector]);
 359                 spin_unlock_irqrestore(&vector_lock, flags);
 360                 cfg->move_cleanup_count--;
 361         unlock:
 362                 raw_spin_unlock(&desc->lock);
 363         }
 364         return IRQ_HANDLED;
 365 }
 366
 367 static struct irqaction irq_move_irqaction = {
 368         .handler =      smp_irq_move_cleanup_interrupt,
 369         .flags =        IRQF_DISABLED,
 370         .name =         "irq_move"
 371 };
 372
 373 static int __init parse_vector_domain(char *arg)
 374 {
 375         if (!arg)
 376                 return -EINVAL;
 377         if (!strcmp(arg, "percpu")) {
 378                 vector_domain_type = VECTOR_DOMAIN_PERCPU;
 379                 no_int_routing = 1;
 380         }
 381         return 0;
 382 }
 383 early_param("vector", parse_vector_domain);
 384 #else
 385 static cpumask_t vector_allocation_domain(int cpu)
 386 {
 387         return CPU_MASK_ALL;
 388 }
 389 #endif
 390
 391
 392 void destroy_and_reserve_irq(unsigned int irq)
 393 {
 394         unsigned long flags;
 395
 396         dynamic_irq_cleanup(irq);
 397
 398         spin_lock_irqsave(&vector_lock, flags);
 399         __clear_irq_vector(irq);
 400         irq_status[irq] = IRQ_RSVD;
 401         spin_unlock_irqrestore(&vector_lock, flags);
 402 }
 403
 404 /*
 405  * Dynamic irq allocate and deallocation for MSI
 406  */
 407 int create_irq(void)
 408 {
 409         unsigned long flags;
 410         int irq, vector, cpu;
 411         cpumask_t domain = CPU_MASK_NONE;
 412
 413         irq = vector = -ENOSPC;
 414         spin_lock_irqsave(&vector_lock, flags);
 415         for_each_online_cpu(cpu) {
 416                 domain = vector_allocation_domain(cpu);
 417                 vector = find_unassigned_vector(domain);
 418                 if (vector >= 0)
 419                         break;
 420         }
 421         if (vector < 0)
 422                 goto out;
 423         irq = find_unassigned_irq();
 424         if (irq < 0)
 425                 goto out;
 426         BUG_ON(__bind_irq_vector(irq, vector, domain));
 427  out:
 428         spin_unlock_irqrestore(&vector_lock, flags);
 429         if (irq >= 0)
 430                 dynamic_irq_init(irq);
 431         return irq;
 432 }
 433
 434 void destroy_irq(unsigned int irq)
 435 {
 436         dynamic_irq_cleanup(irq);
 437         clear_irq_vector(irq);
 438 }
 439
 440 #ifdef CONFIG_SMP
 441 #       define IS_RESCHEDULE(vec)       (vec == IA64_IPI_RESCHEDULE)
 442 #       define IS_LOCAL_TLB_FLUSH(vec)  (vec == IA64_IPI_LOCAL_TLB_FLUSH)
 443 #else
 444 #       define IS_RESCHEDULE(vec)       (0)
 445 #       define IS_LOCAL_TLB_FLUSH(vec)  (0)
 446 #endif
 447 /*
 448  * That's where the IVT branches when we get an external
 449  * interrupt. This branches to the correct hardware IRQ handler via
 450  * function ptr.
 451  */
 452 void
 453 ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
 454 {
 455         struct pt_regs *old_regs = set_irq_regs(regs);
 456         unsigned long saved_tpr;
 457
 458 #if IRQ_DEBUG
 459         {
 460                 unsigned long bsp, sp;
 461
 462                 /*
 463                  * Note: if the interrupt happened while executing in
 464                  * the context switch routine (ia64_switch_to), we may
 465                  * get a spurious stack overflow here.  This is
 466                  * because the register and the memory stack are not
 467                  * switched atomically.
 468                  */
 469                 bsp = ia64_getreg(_IA64_REG_AR_BSP);
 470                 sp = ia64_getreg(_IA64_REG_SP);
 471
 472                 if ((sp - bsp) < 1024) {
 473                         static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
 474
 475                         if (__ratelimit(&ratelimit)) {
 476                                 printk("ia64_handle_irq: DANGER: less than "
 477                                        "1KB of free stack space!!\n"
 478                                        "(bsp=0x%lx, sp=%lx)\n", bsp, sp);
 479                         }
 480                 }
 481         }
 482 #endif /* IRQ_DEBUG */
 483
 484         /*
 485          * Always set TPR to limit maximum interrupt nesting depth to
 486          * 16 (without this, it would be ~240, which could easily lead
 487          * to kernel stack overflows).
 488          */
 489         irq_enter();
 490         saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
 491         ia64_srlz_d();
 492         while (vector != IA64_SPURIOUS_INT_VECTOR) {
 493                 int irq = local_vector_to_irq(vector);
 494                 struct irq_desc *desc = irq_to_desc(irq);
 495
 496                 if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
 497                         smp_local_flush_tlb();
 498                         kstat_incr_irqs_this_cpu(irq, desc);
 499                 } else if (unlikely(IS_RESCHEDULE(vector))) {
 500                         scheduler_ipi();
 501                         kstat_incr_irqs_this_cpu(irq, desc);
 502                 } else {
 503                         ia64_setreg(_IA64_REG_CR_TPR, vector);
 504                         ia64_srlz_d();
 505
 506                         if (unlikely(irq < 0)) {
 507                                 printk(KERN_ERR "%s: Unexpected interrupt "
 508                                        "vector %d on CPU %d is not mapped "
 509                                        "to any IRQ!\n", __func__, vector,
 510                                        smp_processor_id());
 511                         } else
 512                                 generic_handle_irq(irq);
 513
 514                         /*
 515                          * Disable interrupts and send EOI:
 516                          */
 517                         local_irq_disable();
 518                         ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
 519                 }
 520                 ia64_eoi();
 521                 vector = ia64_get_ivr();
 522         }
 523         /*
 524          * This must be done *after* the ia64_eoi().  For example, the keyboard softirq
 525          * handler needs to be able to wait for further keyboard interrupts, which can't
 526          * come through until ia64_eoi() has been done.
 527          */
 528         irq_exit();
 529         set_irq_regs(old_regs);
 530 }
 531
 532 #ifdef CONFIG_HOTPLUG_CPU
 533 /*
 534  * This function emulates a interrupt processing when a cpu is about to be
 535  * brought down.
 536  */
 537 void ia64_process_pending_intr(void)
 538 {
 539         ia64_vector vector;
 540         unsigned long saved_tpr;
 541         extern unsigned int vectors_in_migration[NR_IRQS];
 542
 543         vector = ia64_get_ivr();
 544
 545         irq_enter();
 546         saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
 547         ia64_srlz_d();
 548
 549          /*
 550           * Perform normal interrupt style processing
 551           */
 552         while (vector != IA64_SPURIOUS_INT_VECTOR) {
 553                 int irq = local_vector_to_irq(vector);
 554                 struct irq_desc *desc = irq_to_desc(irq);
 555
 556                 if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
 557                         smp_local_flush_tlb();
 558                         kstat_incr_irqs_this_cpu(irq, desc);
 559                 } else if (unlikely(IS_RESCHEDULE(vector))) {
 560                         kstat_incr_irqs_this_cpu(irq, desc);
 561                 } else {
 562                         struct pt_regs *old_regs = set_irq_regs(NULL);
 563
 564                         ia64_setreg(_IA64_REG_CR_TPR, vector);
 565                         ia64_srlz_d();
 566
 567                         /*
 568                          * Now try calling normal ia64_handle_irq as it would have got called
 569                          * from a real intr handler. Try passing null for pt_regs, hopefully
 570                          * it will work. I hope it works!.
 571                          * Probably could shared code.
 572                          */
 573                         if (unlikely(irq < 0)) {
 574                                 printk(KERN_ERR "%s: Unexpected interrupt "
 575                                        "vector %d on CPU %d not being mapped "
 576                                        "to any IRQ!!\n", __func__, vector,
 577                                        smp_processor_id());
 578                         } else {
 579                                 vectors_in_migration[irq]=0;
 580                                 generic_handle_irq(irq);
 581                         }
 582                         set_irq_regs(old_regs);
 583
 584                         /*
 585                          * Disable interrupts and send EOI
 586                          */
 587                         local_irq_disable();
 588                         ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
 589                 }
 590                 ia64_eoi();
 591                 vector = ia64_get_ivr();
 592         }
 593         irq_exit();
 594 }
 595 #endif
 596
 597
 598 #ifdef CONFIG_SMP
 599
 600 static irqreturn_t dummy_handler (int irq, void *dev_id)
 601 {
 602         BUG();
 603 }
 604
 605 static struct irqaction ipi_irqaction = {
 606         .handler =      handle_IPI,
 607         .flags =        IRQF_DISABLED,
 608         .name =         "IPI"
 609 };
 610
 611 /*
 612  * KVM uses this interrupt to force a cpu out of guest mode
 613  */
 614 static struct irqaction resched_irqaction = {
 615         .handler =      dummy_handler,
 616         .flags =        IRQF_DISABLED,
 617         .name =         "resched"
 618 };
 619
 620 static struct irqaction tlb_irqaction = {
 621         .handler =      dummy_handler,
 622         .flags =        IRQF_DISABLED,
 623         .name =         "tlb_flush"
 624 };
 625
 626 #endif
 627
 628 void
 629 ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action)
 630 {
 631         unsigned int irq;
 632
 633         irq = vec;
 634         BUG_ON(bind_irq_vector(irq, vec, CPU_MASK_ALL));
 635         irq_set_status_flags(irq, IRQ_PER_CPU);
 636         irq_set_chip(irq, &irq_type_ia64_lsapic);
 637         if (action)
 638                 setup_irq(irq, action);
 639         irq_set_handler(irq, handle_percpu_irq);
 640 }
 641
 642 void __init
 643 ia64_native_register_ipi(void)
 644 {
 645 #ifdef CONFIG_SMP
 646         register_percpu_irq(IA64_IPI_VECTOR, &ipi_irqaction);
 647         register_percpu_irq(IA64_IPI_RESCHEDULE, &resched_irqaction);
 648         register_percpu_irq(IA64_IPI_LOCAL_TLB_FLUSH, &tlb_irqaction);
 649 #endif
 650 }
 651
 652 void __init
 653 init_IRQ (void)
 654 {
 655 #ifdef CONFIG_ACPI
 656         acpi_boot_init();
 657 #endif
 658         ia64_register_ipi();
 659         register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL);
 660 #ifdef CONFIG_SMP
 661 #if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG)
 662         if (vector_domain_type != VECTOR_DOMAIN_NONE)
 663                 register_percpu_irq(IA64_IRQ_MOVE_VECTOR, &irq_move_irqaction);
 664 #endif
 665 #endif
 666 #ifdef CONFIG_PERFMON
 667         pfm_init_percpu();
 668 #endif
 669         platform_irq_init();
 670 }
 671
 672 void
 673 ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect)
 674 {
 675         void __iomem *ipi_addr;
 676         unsigned long ipi_data;
 677         unsigned long phys_cpu_id;
 678
 679         phys_cpu_id = cpu_physical_id(cpu);
 680
 681         /*
 682          * cpu number is in 8bit ID and 8bit EID
 683          */
 684
 685         ipi_data = (delivery_mode << 8) | (vector & 0xff);
 686         ipi_addr = ipi_base_addr + ((phys_cpu_id << 4) | ((redirect & 1) << 3));
 687
 688         writeq(ipi_data, ipi_addr);
 689 }