1 /* 2 * Low-level SPU handling 3 * 4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 5 * 6 * Author: Arnd Bergmann <arndb@de.ibm.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2, or (at your option) 11 * any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23 #undef DEBUG 24 25 #include <linux/interrupt.h> 26 #include <linux/list.h> 27 #include <linux/module.h> 28 #include <linux/ptrace.h> 29 #include <linux/slab.h> 30 #include <linux/wait.h> 31 #include <linux/mm.h> 32 #include <linux/io.h> 33 #include <linux/mutex.h> 34 #include <linux/linux_logo.h> 35 #include <asm/spu.h> 36 #include <asm/spu_priv1.h> 37 #include <asm/xmon.h> 38 #include <asm/prom.h> 39 40 const struct spu_management_ops *spu_management_ops; 41 EXPORT_SYMBOL_GPL(spu_management_ops); 42 43 const struct spu_priv1_ops *spu_priv1_ops; 44 EXPORT_SYMBOL_GPL(spu_priv1_ops); 45 46 struct cbe_spu_info cbe_spu_info[MAX_NUMNODES]; 47 EXPORT_SYMBOL_GPL(cbe_spu_info); 48 49 /* 50 * Protects cbe_spu_info and spu->number. 51 */ 52 static DEFINE_SPINLOCK(spu_lock); 53 54 /* 55 * List of all spus in the system. 56 * 57 * This list is iterated by callers from irq context and callers that 58 * want to sleep. Thus modifications need to be done with both 59 * spu_full_list_lock and spu_full_list_mutex held, while iterating 60 * through it requires either of these locks. 61 * 62 * In addition spu_full_list_lock protects all assignmens to 63 * spu->mm. 64 */ 65 static LIST_HEAD(spu_full_list); 66 static DEFINE_SPINLOCK(spu_full_list_lock); 67 static DEFINE_MUTEX(spu_full_list_mutex); 68 69 void spu_invalidate_slbs(struct spu *spu) 70 { 71 struct spu_priv2 __iomem *priv2 = spu->priv2; 72 73 if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK) 74 out_be64(&priv2->slb_invalidate_all_W, 0UL); 75 } 76 EXPORT_SYMBOL_GPL(spu_invalidate_slbs); 77 78 /* This is called by the MM core when a segment size is changed, to 79 * request a flush of all the SPEs using a given mm 80 */ 81 void spu_flush_all_slbs(struct mm_struct *mm) 82 { 83 struct spu *spu; 84 unsigned long flags; 85 86 spin_lock_irqsave(&spu_full_list_lock, flags); 87 list_for_each_entry(spu, &spu_full_list, full_list) { 88 if (spu->mm == mm) 89 spu_invalidate_slbs(spu); 90 } 91 spin_unlock_irqrestore(&spu_full_list_lock, flags); 92 } 93 94 /* The hack below stinks... try to do something better one of 95 * these days... Does it even work properly with NR_CPUS == 1 ? 96 */ 97 static inline void mm_needs_global_tlbie(struct mm_struct *mm) 98 { 99 int nr = (NR_CPUS > 1) ? NR_CPUS : NR_CPUS + 1; 100 101 /* Global TLBIE broadcast required with SPEs. */ 102 __cpus_setall(&mm->cpu_vm_mask, nr); 103 } 104 105 void spu_associate_mm(struct spu *spu, struct mm_struct *mm) 106 { 107 unsigned long flags; 108 109 spin_lock_irqsave(&spu_full_list_lock, flags); 110 spu->mm = mm; 111 spin_unlock_irqrestore(&spu_full_list_lock, flags); 112 if (mm) 113 mm_needs_global_tlbie(mm); 114 } 115 EXPORT_SYMBOL_GPL(spu_associate_mm); 116 117 static int __spu_trap_invalid_dma(struct spu *spu) 118 { 119 pr_debug("%s\n", __FUNCTION__); 120 spu->dma_callback(spu, SPE_EVENT_INVALID_DMA); 121 return 0; 122 } 123 124 static int __spu_trap_dma_align(struct spu *spu) 125 { 126 pr_debug("%s\n", __FUNCTION__); 127 spu->dma_callback(spu, SPE_EVENT_DMA_ALIGNMENT); 128 return 0; 129 } 130 131 static int __spu_trap_error(struct spu *spu) 132 { 133 pr_debug("%s\n", __FUNCTION__); 134 spu->dma_callback(spu, SPE_EVENT_SPE_ERROR); 135 return 0; 136 } 137 138 static void spu_restart_dma(struct spu *spu) 139 { 140 struct spu_priv2 __iomem *priv2 = spu->priv2; 141 142 if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags)) 143 out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); 144 } 145 146 static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) 147 { 148 struct spu_priv2 __iomem *priv2 = spu->priv2; 149 struct mm_struct *mm = spu->mm; 150 u64 esid, vsid, llp; 151 int psize; 152 153 pr_debug("%s\n", __FUNCTION__); 154 155 if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) { 156 /* SLBs are pre-loaded for context switch, so 157 * we should never get here! 158 */ 159 printk("%s: invalid access during switch!\n", __func__); 160 return 1; 161 } 162 esid = (ea & ESID_MASK) | SLB_ESID_V; 163 164 switch(REGION_ID(ea)) { 165 case USER_REGION_ID: 166 #ifdef CONFIG_PPC_MM_SLICES 167 psize = get_slice_psize(mm, ea); 168 #else 169 psize = mm->context.user_psize; 170 #endif 171 vsid = (get_vsid(mm->context.id, ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | 172 SLB_VSID_USER; 173 break; 174 case VMALLOC_REGION_ID: 175 if (ea < VMALLOC_END) 176 psize = mmu_vmalloc_psize; 177 else 178 psize = mmu_io_psize; 179 vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | 180 SLB_VSID_KERNEL; 181 break; 182 case KERNEL_REGION_ID: 183 psize = mmu_linear_psize; 184 vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | 185 SLB_VSID_KERNEL; 186 break; 187 default: 188 /* Future: support kernel segments so that drivers 189 * can use SPUs. 190 */ 191 pr_debug("invalid region access at %016lx\n", ea); 192 return 1; 193 } 194 llp = mmu_psize_defs[psize].sllp; 195 196 out_be64(&priv2->slb_index_W, spu->slb_replace); 197 out_be64(&priv2->slb_vsid_RW, vsid | llp); 198 out_be64(&priv2->slb_esid_RW, esid); 199 200 spu->slb_replace++; 201 if (spu->slb_replace >= 8) 202 spu->slb_replace = 0; 203 204 spu_restart_dma(spu); 205 spu->stats.slb_flt++; 206 return 0; 207 } 208 209 extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX 210 static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr) 211 { 212 pr_debug("%s, %lx, %lx\n", __FUNCTION__, dsisr, ea); 213 214 /* Handle kernel space hash faults immediately. 215 User hash faults need to be deferred to process context. */ 216 if ((dsisr & MFC_DSISR_PTE_NOT_FOUND) 217 && REGION_ID(ea) != USER_REGION_ID 218 && hash_page(ea, _PAGE_PRESENT, 0x300) == 0) { 219 spu_restart_dma(spu); 220 return 0; 221 } 222 223 if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) { 224 printk("%s: invalid access during switch!\n", __func__); 225 return 1; 226 } 227 228 spu->dar = ea; 229 spu->dsisr = dsisr; 230 mb(); 231 spu->stop_callback(spu); 232 return 0; 233 } 234 235 static irqreturn_t 236 spu_irq_class_0(int irq, void *data) 237 { 238 struct spu *spu; 239 unsigned long stat, mask; 240 241 spu = data; 242 243 mask = spu_int_mask_get(spu, 0); 244 stat = spu_int_stat_get(spu, 0); 245 stat &= mask; 246 247 spin_lock(&spu->register_lock); 248 spu->class_0_pending |= stat; 249 spin_unlock(&spu->register_lock); 250 251 spu->stop_callback(spu); 252 253 spu_int_stat_clear(spu, 0, stat); 254 255 return IRQ_HANDLED; 256 } 257 258 int 259 spu_irq_class_0_bottom(struct spu *spu) 260 { 261 unsigned long flags; 262 unsigned long stat; 263 264 spin_lock_irqsave(&spu->register_lock, flags); 265 stat = spu->class_0_pending; 266 spu->class_0_pending = 0; 267 268 if (stat & 1) /* invalid DMA alignment */ 269 __spu_trap_dma_align(spu); 270 271 if (stat & 2) /* invalid MFC DMA */ 272 __spu_trap_invalid_dma(spu); 273 274 if (stat & 4) /* error on SPU */ 275 __spu_trap_error(spu); 276 277 spin_unlock_irqrestore(&spu->register_lock, flags); 278 279 return (stat & 0x7) ? -EIO : 0; 280 } 281 EXPORT_SYMBOL_GPL(spu_irq_class_0_bottom); 282 283 static irqreturn_t 284 spu_irq_class_1(int irq, void *data) 285 { 286 struct spu *spu; 287 unsigned long stat, mask, dar, dsisr; 288 289 spu = data; 290 291 /* atomically read & clear class1 status. */ 292 spin_lock(&spu->register_lock); 293 mask = spu_int_mask_get(spu, 1); 294 stat = spu_int_stat_get(spu, 1) & mask; 295 dar = spu_mfc_dar_get(spu); 296 dsisr = spu_mfc_dsisr_get(spu); 297 if (stat & 2) /* mapping fault */ 298 spu_mfc_dsisr_set(spu, 0ul); 299 spu_int_stat_clear(spu, 1, stat); 300 spin_unlock(&spu->register_lock); 301 pr_debug("%s: %lx %lx %lx %lx\n", __FUNCTION__, mask, stat, 302 dar, dsisr); 303 304 if (stat & 1) /* segment fault */ 305 __spu_trap_data_seg(spu, dar); 306 307 if (stat & 2) { /* mapping fault */ 308 __spu_trap_data_map(spu, dar, dsisr); 309 } 310 311 if (stat & 4) /* ls compare & suspend on get */ 312 ; 313 314 if (stat & 8) /* ls compare & suspend on put */ 315 ; 316 317 return stat ? IRQ_HANDLED : IRQ_NONE; 318 } 319 320 static irqreturn_t 321 spu_irq_class_2(int irq, void *data) 322 { 323 struct spu *spu; 324 unsigned long stat; 325 unsigned long mask; 326 327 spu = data; 328 spin_lock(&spu->register_lock); 329 stat = spu_int_stat_get(spu, 2); 330 mask = spu_int_mask_get(spu, 2); 331 /* ignore interrupts we're not waiting for */ 332 stat &= mask; 333 /* 334 * mailbox interrupts (0x1 and 0x10) are level triggered. 335 * mask them now before acknowledging. 336 */ 337 if (stat & 0x11) 338 spu_int_mask_and(spu, 2, ~(stat & 0x11)); 339 /* acknowledge all interrupts before the callbacks */ 340 spu_int_stat_clear(spu, 2, stat); 341 spin_unlock(&spu->register_lock); 342 343 pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask); 344 345 if (stat & 1) /* PPC core mailbox */ 346 spu->ibox_callback(spu); 347 348 if (stat & 2) /* SPU stop-and-signal */ 349 spu->stop_callback(spu); 350 351 if (stat & 4) /* SPU halted */ 352 spu->stop_callback(spu); 353 354 if (stat & 8) /* DMA tag group complete */ 355 spu->mfc_callback(spu); 356 357 if (stat & 0x10) /* SPU mailbox threshold */ 358 spu->wbox_callback(spu); 359 360 spu->stats.class2_intr++; 361 return stat ? IRQ_HANDLED : IRQ_NONE; 362 } 363 364 static int spu_request_irqs(struct spu *spu) 365 { 366 int ret = 0; 367 368 if (spu->irqs[0] != NO_IRQ) { 369 snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0", 370 spu->number); 371 ret = request_irq(spu->irqs[0], spu_irq_class_0, 372 IRQF_DISABLED, 373 spu->irq_c0, spu); 374 if (ret) 375 goto bail0; 376 } 377 if (spu->irqs[1] != NO_IRQ) { 378 snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1", 379 spu->number); 380 ret = request_irq(spu->irqs[1], spu_irq_class_1, 381 IRQF_DISABLED, 382 spu->irq_c1, spu); 383 if (ret) 384 goto bail1; 385 } 386 if (spu->irqs[2] != NO_IRQ) { 387 snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2", 388 spu->number); 389 ret = request_irq(spu->irqs[2], spu_irq_class_2, 390 IRQF_DISABLED, 391 spu->irq_c2, spu); 392 if (ret) 393 goto bail2; 394 } 395 return 0; 396 397 bail2: 398 if (spu->irqs[1] != NO_IRQ) 399 free_irq(spu->irqs[1], spu); 400 bail1: 401 if (spu->irqs[0] != NO_IRQ) 402 free_irq(spu->irqs[0], spu); 403 bail0: 404 return ret; 405 } 406 407 static void spu_free_irqs(struct spu *spu) 408 { 409 if (spu->irqs[0] != NO_IRQ) 410 free_irq(spu->irqs[0], spu); 411 if (spu->irqs[1] != NO_IRQ) 412 free_irq(spu->irqs[1], spu); 413 if (spu->irqs[2] != NO_IRQ) 414 free_irq(spu->irqs[2], spu); 415 } 416 417 void spu_init_channels(struct spu *spu) 418 { 419 static const struct { 420 unsigned channel; 421 unsigned count; 422 } zero_list[] = { 423 { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, }, 424 { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, }, 425 }, count_list[] = { 426 { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, }, 427 { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, }, 428 { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, }, 429 }; 430 struct spu_priv2 __iomem *priv2; 431 int i; 432 433 priv2 = spu->priv2; 434 435 /* initialize all channel data to zero */ 436 for (i = 0; i < ARRAY_SIZE(zero_list); i++) { 437 int count; 438 439 out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel); 440 for (count = 0; count < zero_list[i].count; count++) 441 out_be64(&priv2->spu_chnldata_RW, 0); 442 } 443 444 /* initialize channel counts to meaningful values */ 445 for (i = 0; i < ARRAY_SIZE(count_list); i++) { 446 out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel); 447 out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count); 448 } 449 } 450 EXPORT_SYMBOL_GPL(spu_init_channels); 451 452 static int spu_shutdown(struct sys_device *sysdev) 453 { 454 struct spu *spu = container_of(sysdev, struct spu, sysdev); 455 456 spu_free_irqs(spu); 457 spu_destroy_spu(spu); 458 return 0; 459 } 460 461 static struct sysdev_class spu_sysdev_class = { 462 set_kset_name("spu"), 463 .shutdown = spu_shutdown, 464 }; 465 466 int spu_add_sysdev_attr(struct sysdev_attribute *attr) 467 { 468 struct spu *spu; 469 470 mutex_lock(&spu_full_list_mutex); 471 list_for_each_entry(spu, &spu_full_list, full_list) 472 sysdev_create_file(&spu->sysdev, attr); 473 mutex_unlock(&spu_full_list_mutex); 474 475 return 0; 476 } 477 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr); 478 479 int spu_add_sysdev_attr_group(struct attribute_group *attrs) 480 { 481 struct spu *spu; 482 483 mutex_lock(&spu_full_list_mutex); 484 list_for_each_entry(spu, &spu_full_list, full_list) 485 sysfs_create_group(&spu->sysdev.kobj, attrs); 486 mutex_unlock(&spu_full_list_mutex); 487 488 return 0; 489 } 490 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr_group); 491 492 493 void spu_remove_sysdev_attr(struct sysdev_attribute *attr) 494 { 495 struct spu *spu; 496 497 mutex_lock(&spu_full_list_mutex); 498 list_for_each_entry(spu, &spu_full_list, full_list) 499 sysdev_remove_file(&spu->sysdev, attr); 500 mutex_unlock(&spu_full_list_mutex); 501 } 502 EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr); 503 504 void spu_remove_sysdev_attr_group(struct attribute_group *attrs) 505 { 506 struct spu *spu; 507 508 mutex_lock(&spu_full_list_mutex); 509 list_for_each_entry(spu, &spu_full_list, full_list) 510 sysfs_remove_group(&spu->sysdev.kobj, attrs); 511 mutex_unlock(&spu_full_list_mutex); 512 } 513 EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr_group); 514 515 static int spu_create_sysdev(struct spu *spu) 516 { 517 int ret; 518 519 spu->sysdev.id = spu->number; 520 spu->sysdev.cls = &spu_sysdev_class; 521 ret = sysdev_register(&spu->sysdev); 522 if (ret) { 523 printk(KERN_ERR "Can't register SPU %d with sysfs\n", 524 spu->number); 525 return ret; 526 } 527 528 sysfs_add_device_to_node(&spu->sysdev, spu->node); 529 530 return 0; 531 } 532 533 static int __init create_spu(void *data) 534 { 535 struct spu *spu; 536 int ret; 537 static int number; 538 unsigned long flags; 539 struct timespec ts; 540 541 ret = -ENOMEM; 542 spu = kzalloc(sizeof (*spu), GFP_KERNEL); 543 if (!spu) 544 goto out; 545 546 spu->alloc_state = SPU_FREE; 547 548 spin_lock_init(&spu->register_lock); 549 spin_lock(&spu_lock); 550 spu->number = number++; 551 spin_unlock(&spu_lock); 552 553 ret = spu_create_spu(spu, data); 554 555 if (ret) 556 goto out_free; 557 558 spu_mfc_sdr_setup(spu); 559 spu_mfc_sr1_set(spu, 0x33); 560 ret = spu_request_irqs(spu); 561 if (ret) 562 goto out_destroy; 563 564 ret = spu_create_sysdev(spu); 565 if (ret) 566 goto out_free_irqs; 567 568 mutex_lock(&cbe_spu_info[spu->node].list_mutex); 569 list_add(&spu->cbe_list, &cbe_spu_info[spu->node].spus); 570 cbe_spu_info[spu->node].n_spus++; 571 mutex_unlock(&cbe_spu_info[spu->node].list_mutex); 572 573 mutex_lock(&spu_full_list_mutex); 574 spin_lock_irqsave(&spu_full_list_lock, flags); 575 list_add(&spu->full_list, &spu_full_list); 576 spin_unlock_irqrestore(&spu_full_list_lock, flags); 577 mutex_unlock(&spu_full_list_mutex); 578 579 spu->stats.util_state = SPU_UTIL_IDLE_LOADED; 580 ktime_get_ts(&ts); 581 spu->stats.tstamp = timespec_to_ns(&ts); 582 583 INIT_LIST_HEAD(&spu->aff_list); 584 585 goto out; 586 587 out_free_irqs: 588 spu_free_irqs(spu); 589 out_destroy: 590 spu_destroy_spu(spu); 591 out_free: 592 kfree(spu); 593 out: 594 return ret; 595 } 596 597 static const char *spu_state_names[] = { 598 "user", "system", "iowait", "idle" 599 }; 600 601 static unsigned long long spu_acct_time(struct spu *spu, 602 enum spu_utilization_state state) 603 { 604 struct timespec ts; 605 unsigned long long time = spu->stats.times[state]; 606 607 /* 608 * If the spu is idle or the context is stopped, utilization 609 * statistics are not updated. Apply the time delta from the 610 * last recorded state of the spu. 611 */ 612 if (spu->stats.util_state == state) { 613 ktime_get_ts(&ts); 614 time += timespec_to_ns(&ts) - spu->stats.tstamp; 615 } 616 617 return time / NSEC_PER_MSEC; 618 } 619 620 621 static ssize_t spu_stat_show(struct sys_device *sysdev, char *buf) 622 { 623 struct spu *spu = container_of(sysdev, struct spu, sysdev); 624 625 return sprintf(buf, "%s %llu %llu %llu %llu " 626 "%llu %llu %llu %llu %llu %llu %llu %llu\n", 627 spu_state_names[spu->stats.util_state], 628 spu_acct_time(spu, SPU_UTIL_USER), 629 spu_acct_time(spu, SPU_UTIL_SYSTEM), 630 spu_acct_time(spu, SPU_UTIL_IOWAIT), 631 spu_acct_time(spu, SPU_UTIL_IDLE_LOADED), 632 spu->stats.vol_ctx_switch, 633 spu->stats.invol_ctx_switch, 634 spu->stats.slb_flt, 635 spu->stats.hash_flt, 636 spu->stats.min_flt, 637 spu->stats.maj_flt, 638 spu->stats.class2_intr, 639 spu->stats.libassist); 640 } 641 642 static SYSDEV_ATTR(stat, 0644, spu_stat_show, NULL); 643 644 static int __init init_spu_base(void) 645 { 646 int i, ret = 0; 647 648 for (i = 0; i < MAX_NUMNODES; i++) { 649 mutex_init(&cbe_spu_info[i].list_mutex); 650 INIT_LIST_HEAD(&cbe_spu_info[i].spus); 651 } 652 653 if (!spu_management_ops) 654 goto out; 655 656 /* create sysdev class for spus */ 657 ret = sysdev_class_register(&spu_sysdev_class); 658 if (ret) 659 goto out; 660 661 ret = spu_enumerate_spus(create_spu); 662 663 if (ret < 0) { 664 printk(KERN_WARNING "%s: Error initializing spus\n", 665 __FUNCTION__); 666 goto out_unregister_sysdev_class; 667 } 668 669 if (ret > 0) { 670 /* 671 * We cannot put the forward declaration in 672 * <linux/linux_logo.h> because of conflicting session type 673 * conflicts for const and __initdata with different compiler 674 * versions 675 */ 676 extern const struct linux_logo logo_spe_clut224; 677 678 fb_append_extra_logo(&logo_spe_clut224, ret); 679 } 680 681 mutex_lock(&spu_full_list_mutex); 682 xmon_register_spus(&spu_full_list); 683 crash_register_spus(&spu_full_list); 684 mutex_unlock(&spu_full_list_mutex); 685 spu_add_sysdev_attr(&attr_stat); 686 687 spu_init_affinity(); 688 689 return 0; 690 691 out_unregister_sysdev_class: 692 sysdev_class_unregister(&spu_sysdev_class); 693 out: 694 return ret; 695 } 696 module_init(init_spu_base); 697 698 MODULE_LICENSE("GPL"); 699 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 700