arch/ia64/kernel/irq_ia64.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * linux/arch/ia64/kernel/irq_ia64.c
   4  *
   5  * Copyright (C) 1998-2001 Hewlett-Packard Co
   6  *      Stephane Eranian <eranian@hpl.hp.com>
   7  *      David Mosberger-Tang <davidm@hpl.hp.com>
   8  *
   9  *  6/10/99: Updated to bring in sync with x86 version to facilitate
  10  *           support for SMP and different interrupt controllers.
  11  *
  12  * 09/15/00 Goutham Rao <goutham.rao@intel.com> Implemented pci_irq_to_vector
  13  *                      PCI to vector allocation routine.
  14  * 04/14/2004 Ashok Raj <ashok.raj@intel.com>
  15  *                                              Added CPU Hotplug handling for IPF.
  16  */
  17
  18 #include <linux/module.h>
  19
  20 #include <linux/jiffies.h>
  21 #include <linux/errno.h>
  22 #include <linux/init.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/ioport.h>
  25 #include <linux/kernel_stat.h>
  26 #include <linux/ptrace.h>
  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/tlbflush.h>
  43
  44 #ifdef CONFIG_PERFMON
  45 # include <asm/perfmon.h>
  46 #endif
  47
  48 #define IRQ_DEBUG       0
  49
  50 #define IRQ_VECTOR_UNASSIGNED   (0)
  51
  52 #define IRQ_UNUSED              (0)
  53 #define IRQ_USED                (1)
  54 #define IRQ_RSVD                (2)
  55
  56 /* These can be overridden in platform_irq_init */
  57 int ia64_first_device_vector = IA64_DEF_FIRST_DEVICE_VECTOR;
  58 int ia64_last_device_vector = IA64_DEF_LAST_DEVICE_VECTOR;
  59
  60 /* default base addr of IPI table */
  61 void __iomem *ipi_base_addr = ((void __iomem *)
  62                                (__IA64_UNCACHED_OFFSET | IA64_IPI_DEFAULT_BASE_ADDR));
  63
  64 static cpumask_t vector_allocation_domain(int cpu);
  65
  66 /*
  67  * Legacy IRQ to IA-64 vector translation table.
  68  */
  69 __u8 isa_irq_to_vector_map[16] = {
  70         /* 8259 IRQ translation, first 16 entries */
  71         0x2f, 0x20, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29,
  72         0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21
  73 };
  74 EXPORT_SYMBOL(isa_irq_to_vector_map);
  75
  76 DEFINE_SPINLOCK(vector_lock);
  77
  78 struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
  79         [0 ... NR_IRQS - 1] = {
  80                 .vector = IRQ_VECTOR_UNASSIGNED,
  81                 .domain = CPU_MASK_NONE
  82         }
  83 };
  84
  85 DEFINE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq) = {
  86         [0 ... IA64_NUM_VECTORS - 1] = -1
  87 };
  88
  89 static cpumask_t vector_table[IA64_NUM_VECTORS] = {
  90         [0 ... IA64_NUM_VECTORS - 1] = CPU_MASK_NONE
  91 };
  92
  93 static int irq_status[NR_IRQS] = {
  94         [0 ... NR_IRQS -1] = IRQ_UNUSED
  95 };
  96
  97 static inline int find_unassigned_irq(void)
  98 {
  99         int irq;
 100
 101         for (irq = IA64_FIRST_DEVICE_VECTOR; irq < NR_IRQS; irq++)
 102                 if (irq_status[irq] == IRQ_UNUSED)
 103                         return irq;
 104         return -ENOSPC;
 105 }
 106
 107 static inline int find_unassigned_vector(cpumask_t domain)
 108 {
 109         cpumask_t mask;
 110         int pos, vector;
 111
 112         cpumask_and(&mask, &domain, cpu_online_mask);
 113         if (cpumask_empty(&mask))
 114                 return -EINVAL;
 115
 116         for (pos = 0; pos < IA64_NUM_DEVICE_VECTORS; pos++) {
 117                 vector = IA64_FIRST_DEVICE_VECTOR + pos;
 118                 cpumask_and(&mask, &domain, &vector_table[vector]);
 119                 if (!cpumask_empty(&mask))
 120                         continue;
 121                 return vector;
 122         }
 123         return -ENOSPC;
 124 }
 125
 126 static int __bind_irq_vector(int irq, int vector, cpumask_t domain)
 127 {
 128         cpumask_t mask;
 129         int cpu;
 130         struct irq_cfg *cfg = &irq_cfg[irq];
 131
 132         BUG_ON((unsigned)irq >= NR_IRQS);
 133         BUG_ON((unsigned)vector >= IA64_NUM_VECTORS);
 134
 135         cpumask_and(&mask, &domain, cpu_online_mask);
 136         if (cpumask_empty(&mask))
 137                 return -EINVAL;
 138         if ((cfg->vector == vector) && cpumask_equal(&cfg->domain, &domain))
 139                 return 0;
 140         if (cfg->vector != IRQ_VECTOR_UNASSIGNED)
 141                 return -EBUSY;
 142         for_each_cpu(cpu, &mask)
 143                 per_cpu(vector_irq, cpu)[vector] = irq;
 144         cfg->vector = vector;
 145         cfg->domain = domain;
 146         irq_status[irq] = IRQ_USED;
 147         cpumask_or(&vector_table[vector], &vector_table[vector], &domain);
 148         return 0;
 149 }
 150
 151 int bind_irq_vector(int irq, int vector, cpumask_t domain)
 152 {
 153         unsigned long flags;
 154         int ret;
 155
 156         spin_lock_irqsave(&vector_lock, flags);
 157         ret = __bind_irq_vector(irq, vector, domain);
 158         spin_unlock_irqrestore(&vector_lock, flags);
 159         return ret;
 160 }
 161
 162 static void __clear_irq_vector(int irq)
 163 {
 164         int vector, cpu;
 165         cpumask_t domain;
 166         struct irq_cfg *cfg = &irq_cfg[irq];
 167
 168         BUG_ON((unsigned)irq >= NR_IRQS);
 169         BUG_ON(cfg->vector == IRQ_VECTOR_UNASSIGNED);
 170         vector = cfg->vector;
 171         domain = cfg->domain;
 172         for_each_cpu_and(cpu, &cfg->domain, cpu_online_mask)
 173                 per_cpu(vector_irq, cpu)[vector] = -1;
 174         cfg->vector = IRQ_VECTOR_UNASSIGNED;
 175         cfg->domain = CPU_MASK_NONE;
 176         irq_status[irq] = IRQ_UNUSED;
 177         cpumask_andnot(&vector_table[vector], &vector_table[vector], &domain);
 178 }
 179
 180 static void clear_irq_vector(int irq)
 181 {
 182         unsigned long flags;
 183
 184         spin_lock_irqsave(&vector_lock, flags);
 185         __clear_irq_vector(irq);
 186         spin_unlock_irqrestore(&vector_lock, flags);
 187 }
 188
 189 int
 190 ia64_native_assign_irq_vector (int irq)
 191 {
 192         unsigned long flags;
 193         int vector, cpu;
 194         cpumask_t domain = CPU_MASK_NONE;
 195
 196         vector = -ENOSPC;
 197
 198         spin_lock_irqsave(&vector_lock, flags);
 199         for_each_online_cpu(cpu) {
 200                 domain = vector_allocation_domain(cpu);
 201                 vector = find_unassigned_vector(domain);
 202                 if (vector >= 0)
 203                         break;
 204         }
 205         if (vector < 0)
 206                 goto out;
 207         if (irq == AUTO_ASSIGN)
 208                 irq = vector;
 209         BUG_ON(__bind_irq_vector(irq, vector, domain));
 210  out:
 211         spin_unlock_irqrestore(&vector_lock, flags);
 212         return vector;
 213 }
 214
 215 void
 216 ia64_native_free_irq_vector (int vector)
 217 {
 218         if (vector < IA64_FIRST_DEVICE_VECTOR ||
 219             vector > IA64_LAST_DEVICE_VECTOR)
 220                 return;
 221         clear_irq_vector(vector);
 222 }
 223
 224 int
 225 reserve_irq_vector (int vector)
 226 {
 227         if (vector < IA64_FIRST_DEVICE_VECTOR ||
 228             vector > IA64_LAST_DEVICE_VECTOR)
 229                 return -EINVAL;
 230         return !!bind_irq_vector(vector, vector, CPU_MASK_ALL);
 231 }
 232
 233 /*
 234  * Initialize vector_irq on a new cpu. This function must be called
 235  * with vector_lock held.
 236  */
 237 void __setup_vector_irq(int cpu)
 238 {
 239         int irq, vector;
 240
 241         /* Clear vector_irq */
 242         for (vector = 0; vector < IA64_NUM_VECTORS; ++vector)
 243                 per_cpu(vector_irq, cpu)[vector] = -1;
 244         /* Mark the inuse vectors */
 245         for (irq = 0; irq < NR_IRQS; ++irq) {
 246                 if (!cpumask_test_cpu(cpu, &irq_cfg[irq].domain))
 247                         continue;
 248                 vector = irq_to_vector(irq);
 249                 per_cpu(vector_irq, cpu)[vector] = irq;
 250         }
 251 }
 252
 253 #if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG))
 254
 255 static enum vector_domain_type {
 256         VECTOR_DOMAIN_NONE,
 257         VECTOR_DOMAIN_PERCPU
 258 } vector_domain_type = VECTOR_DOMAIN_NONE;
 259
 260 static cpumask_t vector_allocation_domain(int cpu)
 261 {
 262         if (vector_domain_type == VECTOR_DOMAIN_PERCPU)
 263                 return *cpumask_of(cpu);
 264         return CPU_MASK_ALL;
 265 }
 266
 267 static int __irq_prepare_move(int irq, int cpu)
 268 {
 269         struct irq_cfg *cfg = &irq_cfg[irq];
 270         int vector;
 271         cpumask_t domain;
 272
 273         if (cfg->move_in_progress || cfg->move_cleanup_count)
 274                 return -EBUSY;
 275         if (cfg->vector == IRQ_VECTOR_UNASSIGNED || !cpu_online(cpu))
 276                 return -EINVAL;
 277         if (cpumask_test_cpu(cpu, &cfg->domain))
 278                 return 0;
 279         domain = vector_allocation_domain(cpu);
 280         vector = find_unassigned_vector(domain);
 281         if (vector < 0)
 282                 return -ENOSPC;
 283         cfg->move_in_progress = 1;
 284         cfg->old_domain = cfg->domain;
 285         cfg->vector = IRQ_VECTOR_UNASSIGNED;
 286         cfg->domain = CPU_MASK_NONE;
 287         BUG_ON(__bind_irq_vector(irq, vector, domain));
 288         return 0;
 289 }
 290
 291 int irq_prepare_move(int irq, int cpu)
 292 {
 293         unsigned long flags;
 294         int ret;
 295
 296         spin_lock_irqsave(&vector_lock, flags);
 297         ret = __irq_prepare_move(irq, cpu);
 298         spin_unlock_irqrestore(&vector_lock, flags);
 299         return ret;
 300 }
 301
 302 void irq_complete_move(unsigned irq)
 303 {
 304         struct irq_cfg *cfg = &irq_cfg[irq];
 305         cpumask_t cleanup_mask;
 306         int i;
 307
 308         if (likely(!cfg->move_in_progress))
 309                 return;
 310
 311         if (unlikely(cpumask_test_cpu(smp_processor_id(), &cfg->old_domain)))
 312                 return;
 313
 314         cpumask_and(&cleanup_mask, &cfg->old_domain, cpu_online_mask);
 315         cfg->move_cleanup_count = cpumask_weight(&cleanup_mask);
 316         for_each_cpu(i, &cleanup_mask)
 317                 platform_send_ipi(i, IA64_IRQ_MOVE_VECTOR, IA64_IPI_DM_INT, 0);
 318         cfg->move_in_progress = 0;
 319 }
 320
 321 static irqreturn_t smp_irq_move_cleanup_interrupt(int irq, void *dev_id)
 322 {
 323         int me = smp_processor_id();
 324         ia64_vector vector;
 325         unsigned long flags;
 326
 327         for (vector = IA64_FIRST_DEVICE_VECTOR;
 328              vector < IA64_LAST_DEVICE_VECTOR; vector++) {
 329                 int irq;
 330                 struct irq_desc *desc;
 331                 struct irq_cfg *cfg;
 332                 irq = __this_cpu_read(vector_irq[vector]);
 333                 if (irq < 0)
 334                         continue;
 335
 336                 desc = irq_to_desc(irq);
 337                 cfg = irq_cfg + irq;
 338                 raw_spin_lock(&desc->lock);
 339                 if (!cfg->move_cleanup_count)
 340                         goto unlock;
 341
 342                 if (!cpumask_test_cpu(me, &cfg->old_domain))
 343                         goto unlock;
 344
 345                 spin_lock_irqsave(&vector_lock, flags);
 346                 __this_cpu_write(vector_irq[vector], -1);
 347                 cpumask_clear_cpu(me, &vector_table[vector]);
 348                 spin_unlock_irqrestore(&vector_lock, flags);
 349                 cfg->move_cleanup_count--;
 350         unlock:
 351                 raw_spin_unlock(&desc->lock);
 352         }
 353         return IRQ_HANDLED;
 354 }
 355
 356 static struct irqaction irq_move_irqaction = {
 357         .handler =      smp_irq_move_cleanup_interrupt,
 358         .name =         "irq_move"
 359 };
 360
 361 static int __init parse_vector_domain(char *arg)
 362 {
 363         if (!arg)
 364                 return -EINVAL;
 365         if (!strcmp(arg, "percpu")) {
 366                 vector_domain_type = VECTOR_DOMAIN_PERCPU;
 367                 no_int_routing = 1;
 368         }
 369         return 0;
 370 }
 371 early_param("vector", parse_vector_domain);
 372 #else
 373 static cpumask_t vector_allocation_domain(int cpu)
 374 {
 375         return CPU_MASK_ALL;
 376 }
 377 #endif
 378
 379
 380 void destroy_and_reserve_irq(unsigned int irq)
 381 {
 382         unsigned long flags;
 383
 384         irq_init_desc(irq);
 385         spin_lock_irqsave(&vector_lock, flags);
 386         __clear_irq_vector(irq);
 387         irq_status[irq] = IRQ_RSVD;
 388         spin_unlock_irqrestore(&vector_lock, flags);
 389 }
 390
 391 /*
 392  * Dynamic irq allocate and deallocation for MSI
 393  */
 394 int create_irq(void)
 395 {
 396         unsigned long flags;
 397         int irq, vector, cpu;
 398         cpumask_t domain = CPU_MASK_NONE;
 399
 400         irq = vector = -ENOSPC;
 401         spin_lock_irqsave(&vector_lock, flags);
 402         for_each_online_cpu(cpu) {
 403                 domain = vector_allocation_domain(cpu);
 404                 vector = find_unassigned_vector(domain);
 405                 if (vector >= 0)
 406                         break;
 407         }
 408         if (vector < 0)
 409                 goto out;
 410         irq = find_unassigned_irq();
 411         if (irq < 0)
 412                 goto out;
 413         BUG_ON(__bind_irq_vector(irq, vector, domain));
 414  out:
 415         spin_unlock_irqrestore(&vector_lock, flags);
 416         if (irq >= 0)
 417                 irq_init_desc(irq);
 418         return irq;
 419 }
 420
 421 void destroy_irq(unsigned int irq)
 422 {
 423         irq_init_desc(irq);
 424         clear_irq_vector(irq);
 425 }
 426
 427 #ifdef CONFIG_SMP
 428 #       define IS_RESCHEDULE(vec)       (vec == IA64_IPI_RESCHEDULE)
 429 #       define IS_LOCAL_TLB_FLUSH(vec)  (vec == IA64_IPI_LOCAL_TLB_FLUSH)
 430 #else
 431 #       define IS_RESCHEDULE(vec)       (0)
 432 #       define IS_LOCAL_TLB_FLUSH(vec)  (0)
 433 #endif
 434 /*
 435  * That's where the IVT branches when we get an external
 436  * interrupt. This branches to the correct hardware IRQ handler via
 437  * function ptr.
 438  */
 439 void
 440 ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
 441 {
 442         struct pt_regs *old_regs = set_irq_regs(regs);
 443         unsigned long saved_tpr;
 444
 445 #if IRQ_DEBUG
 446         {
 447                 unsigned long bsp, sp;
 448
 449                 /*
 450                  * Note: if the interrupt happened while executing in
 451                  * the context switch routine (ia64_switch_to), we may
 452                  * get a spurious stack overflow here.  This is
 453                  * because the register and the memory stack are not
 454                  * switched atomically.
 455                  */
 456                 bsp = ia64_getreg(_IA64_REG_AR_BSP);
 457                 sp = ia64_getreg(_IA64_REG_SP);
 458
 459                 if ((sp - bsp) < 1024) {
 460                         static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
 461
 462                         if (__ratelimit(&ratelimit)) {
 463                                 printk("ia64_handle_irq: DANGER: less than "
 464                                        "1KB of free stack space!!\n"
 465                                        "(bsp=0x%lx, sp=%lx)\n", bsp, sp);
 466                         }
 467                 }
 468         }
 469 #endif /* IRQ_DEBUG */
 470
 471         /*
 472          * Always set TPR to limit maximum interrupt nesting depth to
 473          * 16 (without this, it would be ~240, which could easily lead
 474          * to kernel stack overflows).
 475          */
 476         irq_enter();
 477         saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
 478         ia64_srlz_d();
 479         while (vector != IA64_SPURIOUS_INT_VECTOR) {
 480                 int irq = local_vector_to_irq(vector);
 481
 482                 if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
 483                         smp_local_flush_tlb();
 484                         kstat_incr_irq_this_cpu(irq);
 485                 } else if (unlikely(IS_RESCHEDULE(vector))) {
 486                         scheduler_ipi();
 487                         kstat_incr_irq_this_cpu(irq);
 488                 } else {
 489                         ia64_setreg(_IA64_REG_CR_TPR, vector);
 490                         ia64_srlz_d();
 491
 492                         if (unlikely(irq < 0)) {
 493                                 printk(KERN_ERR "%s: Unexpected interrupt "
 494                                        "vector %d on CPU %d is not mapped "
 495                                        "to any IRQ!\n", __func__, vector,
 496                                        smp_processor_id());
 497                         } else
 498                                 generic_handle_irq(irq);
 499
 500                         /*
 501                          * Disable interrupts and send EOI:
 502                          */
 503                         local_irq_disable();
 504                         ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
 505                 }
 506                 ia64_eoi();
 507                 vector = ia64_get_ivr();
 508         }
 509         /*
 510          * This must be done *after* the ia64_eoi().  For example, the keyboard softirq
 511          * handler needs to be able to wait for further keyboard interrupts, which can't
 512          * come through until ia64_eoi() has been done.
 513          */
 514         irq_exit();
 515         set_irq_regs(old_regs);
 516 }
 517
 518 #ifdef CONFIG_HOTPLUG_CPU
 519 /*
 520  * This function emulates a interrupt processing when a cpu is about to be
 521  * brought down.
 522  */
 523 void ia64_process_pending_intr(void)
 524 {
 525         ia64_vector vector;
 526         unsigned long saved_tpr;
 527         extern unsigned int vectors_in_migration[NR_IRQS];
 528
 529         vector = ia64_get_ivr();
 530
 531         irq_enter();
 532         saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
 533         ia64_srlz_d();
 534
 535          /*
 536           * Perform normal interrupt style processing
 537           */
 538         while (vector != IA64_SPURIOUS_INT_VECTOR) {
 539                 int irq = local_vector_to_irq(vector);
 540
 541                 if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
 542                         smp_local_flush_tlb();
 543                         kstat_incr_irq_this_cpu(irq);
 544                 } else if (unlikely(IS_RESCHEDULE(vector))) {
 545                         kstat_incr_irq_this_cpu(irq);
 546                 } else {
 547                         struct pt_regs *old_regs = set_irq_regs(NULL);
 548
 549                         ia64_setreg(_IA64_REG_CR_TPR, vector);
 550                         ia64_srlz_d();
 551
 552                         /*
 553                          * Now try calling normal ia64_handle_irq as it would have got called
 554                          * from a real intr handler. Try passing null for pt_regs, hopefully
 555                          * it will work. I hope it works!.
 556                          * Probably could shared code.
 557                          */
 558                         if (unlikely(irq < 0)) {
 559                                 printk(KERN_ERR "%s: Unexpected interrupt "
 560                                        "vector %d on CPU %d not being mapped "
 561                                        "to any IRQ!!\n", __func__, vector,
 562                                        smp_processor_id());
 563                         } else {
 564                                 vectors_in_migration[irq]=0;
 565                                 generic_handle_irq(irq);
 566                         }
 567                         set_irq_regs(old_regs);
 568
 569                         /*
 570                          * Disable interrupts and send EOI
 571                          */
 572                         local_irq_disable();
 573                         ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
 574                 }
 575                 ia64_eoi();
 576                 vector = ia64_get_ivr();
 577         }
 578         irq_exit();
 579 }
 580 #endif
 581
 582
 583 #ifdef CONFIG_SMP
 584
 585 static irqreturn_t dummy_handler (int irq, void *dev_id)
 586 {
 587         BUG();
 588 }
 589
 590 static struct irqaction ipi_irqaction = {
 591         .handler =      handle_IPI,
 592         .name =         "IPI"
 593 };
 594
 595 /*
 596  * KVM uses this interrupt to force a cpu out of guest mode
 597  */
 598 static struct irqaction resched_irqaction = {
 599         .handler =      dummy_handler,
 600         .name =         "resched"
 601 };
 602
 603 static struct irqaction tlb_irqaction = {
 604         .handler =      dummy_handler,
 605         .name =         "tlb_flush"
 606 };
 607
 608 #endif
 609
 610 void
 611 ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action)
 612 {
 613         unsigned int irq;
 614
 615         irq = vec;
 616         BUG_ON(bind_irq_vector(irq, vec, CPU_MASK_ALL));
 617         irq_set_status_flags(irq, IRQ_PER_CPU);
 618         irq_set_chip(irq, &irq_type_ia64_lsapic);
 619         if (action)
 620                 setup_irq(irq, action);
 621         irq_set_handler(irq, handle_percpu_irq);
 622 }
 623
 624 void __init
 625 ia64_native_register_ipi(void)
 626 {
 627 #ifdef CONFIG_SMP
 628         register_percpu_irq(IA64_IPI_VECTOR, &ipi_irqaction);
 629         register_percpu_irq(IA64_IPI_RESCHEDULE, &resched_irqaction);
 630         register_percpu_irq(IA64_IPI_LOCAL_TLB_FLUSH, &tlb_irqaction);
 631 #endif
 632 }
 633
 634 void __init
 635 init_IRQ (void)
 636 {
 637 #ifdef CONFIG_ACPI
 638         acpi_boot_init();
 639 #endif
 640         ia64_register_ipi();
 641         register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL);
 642 #ifdef CONFIG_SMP
 643 #if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG)
 644         if (vector_domain_type != VECTOR_DOMAIN_NONE)
 645                 register_percpu_irq(IA64_IRQ_MOVE_VECTOR, &irq_move_irqaction);
 646 #endif
 647 #endif
 648 #ifdef CONFIG_PERFMON
 649         pfm_init_percpu();
 650 #endif
 651         platform_irq_init();
 652 }
 653
 654 void
 655 ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect)
 656 {
 657         void __iomem *ipi_addr;
 658         unsigned long ipi_data;
 659         unsigned long phys_cpu_id;
 660
 661         phys_cpu_id = cpu_physical_id(cpu);
 662
 663         /*
 664          * cpu number is in 8bit ID and 8bit EID
 665          */
 666
 667         ipi_data = (delivery_mode << 8) | (vector & 0xff);
 668         ipi_addr = ipi_base_addr + ((phys_cpu_id << 4) | ((redirect & 1) << 3));
 669
 670         writeq(ipi_data, ipi_addr);
 671 }