arch/powerpc/platforms/powermac/setup.c

   1 /*
   2  *  Powermac setup and early boot code plus other random bits.
   3  *
   4  *  PowerPC version
   5  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
   6  *
   7  *  Adapted for Power Macintosh by Paul Mackerras
   8  *    Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
   9  *
  10  *  Derived from "arch/alpha/kernel/setup.c"
  11  *    Copyright (C) 1995 Linus Torvalds
  12  *
  13  *  Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation; either version
  18  *  2 of the License, or (at your option) any later version.
  19  *
  20  */
  21
  22 /*
  23  * bootup setup stuff..
  24  */
  25
  26 #include <linux/config.h>
  27 #include <linux/init.h>
  28 #include <linux/errno.h>
  29 #include <linux/sched.h>
  30 #include <linux/kernel.h>
  31 #include <linux/mm.h>
  32 #include <linux/stddef.h>
  33 #include <linux/unistd.h>
  34 #include <linux/ptrace.h>
  35 #include <linux/slab.h>
  36 #include <linux/user.h>
  37 #include <linux/a.out.h>
  38 #include <linux/tty.h>
  39 #include <linux/string.h>
  40 #include <linux/delay.h>
  41 #include <linux/ioport.h>
  42 #include <linux/major.h>
  43 #include <linux/initrd.h>
  44 #include <linux/vt_kern.h>
  45 #include <linux/console.h>
  46 #include <linux/ide.h>
  47 #include <linux/pci.h>
  48 #include <linux/adb.h>
  49 #include <linux/cuda.h>
  50 #include <linux/pmu.h>
  51 #include <linux/irq.h>
  52 #include <linux/seq_file.h>
  53 #include <linux/root_dev.h>
  54 #include <linux/bitops.h>
  55 #include <linux/suspend.h>
  56
  57 #include <asm/reg.h>
  58 #include <asm/sections.h>
  59 #include <asm/prom.h>
  60 #include <asm/system.h>
  61 #include <asm/pgtable.h>
  62 #include <asm/io.h>
  63 #include <asm/kexec.h>
  64 #include <asm/pci-bridge.h>
  65 #include <asm/ohare.h>
  66 #include <asm/mediabay.h>
  67 #include <asm/machdep.h>
  68 #include <asm/dma.h>
  69 #include <asm/cputable.h>
  70 #include <asm/btext.h>
  71 #include <asm/pmac_feature.h>
  72 #include <asm/time.h>
  73 #include <asm/of_device.h>
  74 #include <asm/mmu_context.h>
  75 #include <asm/iommu.h>
  76 #include <asm/smu.h>
  77 #include <asm/pmc.h>
  78 #include <asm/mpic.h>
  79 #include <asm/lmb.h>
  80
  81 #include "pmac.h"
  82
  83 #undef SHOW_GATWICK_IRQS
  84
  85 unsigned char drive_info;
  86
  87 int ppc_override_l2cr = 0;
  88 int ppc_override_l2cr_value;
  89 int has_l2cache = 0;
  90
  91 int pmac_newworld = 1;
  92
  93 static int current_root_goodness = -1;
  94
  95 extern int pmac_newworld;
  96 extern struct machdep_calls pmac_md;
  97
  98 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
  99
 100 #ifdef CONFIG_PPC64
 101 #include <asm/udbg.h>
 102 int sccdbg;
 103 #endif
 104
 105 extern void zs_kgdb_hook(int tty_num);
 106
 107 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
 108 EXPORT_SYMBOL(sys_ctrler);
 109
 110 #ifdef CONFIG_PMAC_SMU
 111 unsigned long smu_cmdbuf_abs;
 112 EXPORT_SYMBOL(smu_cmdbuf_abs);
 113 #endif
 114
 115 #ifdef CONFIG_SMP
 116 extern struct smp_ops_t psurge_smp_ops;
 117 extern struct smp_ops_t core99_smp_ops;
 118 #endif /* CONFIG_SMP */
 119
 120 static void pmac_show_cpuinfo(struct seq_file *m)
 121 {
 122         struct device_node *np;
 123         char *pp;
 124         int plen;
 125         int mbmodel;
 126         unsigned int mbflags;
 127         char* mbname;
 128
 129         mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 130                                     PMAC_MB_INFO_MODEL, 0);
 131         mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 132                                     PMAC_MB_INFO_FLAGS, 0);
 133         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
 134                               (long) &mbname) != 0)
 135                 mbname = "Unknown";
 136
 137         /* find motherboard type */
 138         seq_printf(m, "machine\t\t: ");
 139         np = of_find_node_by_path("/");
 140         if (np != NULL) {
 141                 pp = (char *) get_property(np, "model", NULL);
 142                 if (pp != NULL)
 143                         seq_printf(m, "%s\n", pp);
 144                 else
 145                         seq_printf(m, "PowerMac\n");
 146                 pp = (char *) get_property(np, "compatible", &plen);
 147                 if (pp != NULL) {
 148                         seq_printf(m, "motherboard\t:");
 149                         while (plen > 0) {
 150                                 int l = strlen(pp) + 1;
 151                                 seq_printf(m, " %s", pp);
 152                                 plen -= l;
 153                                 pp += l;
 154                         }
 155                         seq_printf(m, "\n");
 156                 }
 157                 of_node_put(np);
 158         } else
 159                 seq_printf(m, "PowerMac\n");
 160
 161         /* print parsed model */
 162         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
 163         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 164
 165         /* find l2 cache info */
 166         np = of_find_node_by_name(NULL, "l2-cache");
 167         if (np == NULL)
 168                 np = of_find_node_by_type(NULL, "cache");
 169         if (np != NULL) {
 170                 unsigned int *ic = (unsigned int *)
 171                         get_property(np, "i-cache-size", NULL);
 172                 unsigned int *dc = (unsigned int *)
 173                         get_property(np, "d-cache-size", NULL);
 174                 seq_printf(m, "L2 cache\t:");
 175                 has_l2cache = 1;
 176                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
 177                         seq_printf(m, " %dK unified", *dc / 1024);
 178                 } else {
 179                         if (ic)
 180                                 seq_printf(m, " %dK instruction", *ic / 1024);
 181                         if (dc)
 182                                 seq_printf(m, "%s %dK data",
 183                                            (ic? " +": ""), *dc / 1024);
 184                 }
 185                 pp = get_property(np, "ram-type", NULL);
 186                 if (pp)
 187                         seq_printf(m, " %s", pp);
 188                 seq_printf(m, "\n");
 189                 of_node_put(np);
 190         }
 191
 192         /* Indicate newworld/oldworld */
 193         seq_printf(m, "pmac-generation\t: %s\n",
 194                    pmac_newworld ? "NewWorld" : "OldWorld");
 195 }
 196
 197 #ifndef CONFIG_ADB_CUDA
 198 int find_via_cuda(void)
 199 {
 200         if (!find_devices("via-cuda"))
 201                 return 0;
 202         printk("WARNING ! Your machine is CUDA-based but your kernel\n");
 203         printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
 204         return 0;
 205 }
 206 #endif
 207
 208 #ifndef CONFIG_ADB_PMU
 209 int find_via_pmu(void)
 210 {
 211         if (!find_devices("via-pmu"))
 212                 return 0;
 213         printk("WARNING ! Your machine is PMU-based but your kernel\n");
 214         printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
 215         return 0;
 216 }
 217 #endif
 218
 219 #ifndef CONFIG_PMAC_SMU
 220 int smu_init(void)
 221 {
 222         /* should check and warn if SMU is present */
 223         return 0;
 224 }
 225 #endif
 226
 227 #ifdef CONFIG_PPC32
 228 static volatile u32 *sysctrl_regs;
 229
 230 static void __init ohare_init(void)
 231 {
 232         /* this area has the CPU identification register
 233            and some registers used by smp boards */
 234         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 235
 236         /*
 237          * Turn on the L2 cache.
 238          * We assume that we have a PSX memory controller iff
 239          * we have an ohare I/O controller.
 240          */
 241         if (find_devices("ohare") != NULL) {
 242                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
 243                         if (sysctrl_regs[4] & 0x10)
 244                                 sysctrl_regs[4] |= 0x04000020;
 245                         else
 246                                 sysctrl_regs[4] |= 0x04000000;
 247                         if(has_l2cache)
 248                                 printk(KERN_INFO "Level 2 cache enabled\n");
 249                 }
 250         }
 251 }
 252
 253 static void __init l2cr_init(void)
 254 {
 255         /* Checks "l2cr-value" property in the registry */
 256         if (cpu_has_feature(CPU_FTR_L2CR)) {
 257                 struct device_node *np = find_devices("cpus");
 258                 if (np == 0)
 259                         np = find_type_devices("cpu");
 260                 if (np != 0) {
 261                         unsigned int *l2cr = (unsigned int *)
 262                                 get_property(np, "l2cr-value", NULL);
 263                         if (l2cr != 0) {
 264                                 ppc_override_l2cr = 1;
 265                                 ppc_override_l2cr_value = *l2cr;
 266                                 _set_L2CR(0);
 267                                 _set_L2CR(ppc_override_l2cr_value);
 268                         }
 269                 }
 270         }
 271
 272         if (ppc_override_l2cr)
 273                 printk(KERN_INFO "L2CR overridden (0x%x), "
 274                        "backside cache is %s\n",
 275                        ppc_override_l2cr_value,
 276                        (ppc_override_l2cr_value & 0x80000000)
 277                                 ? "enabled" : "disabled");
 278 }
 279 #endif
 280
 281 void __init pmac_setup_arch(void)
 282 {
 283         struct device_node *cpu, *ic;
 284         int *fp;
 285         unsigned long pvr;
 286
 287         pvr = PVR_VER(mfspr(SPRN_PVR));
 288
 289         /* Set loops_per_jiffy to a half-way reasonable value,
 290            for use until calibrate_delay gets called. */
 291         loops_per_jiffy = 50000000 / HZ;
 292         cpu = of_find_node_by_type(NULL, "cpu");
 293         if (cpu != NULL) {
 294                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 295                 if (fp != NULL) {
 296                         if (pvr >= 0x30 && pvr < 0x80)
 297                                 /* PPC970 etc. */
 298                                 loops_per_jiffy = *fp / (3 * HZ);
 299                         else if (pvr == 4 || pvr >= 8)
 300                                 /* 604, G3, G4 etc. */
 301                                 loops_per_jiffy = *fp / HZ;
 302                         else
 303                                 /* 601, 603, etc. */
 304                                 loops_per_jiffy = *fp / (2 * HZ);
 305                 }
 306                 of_node_put(cpu);
 307         }
 308
 309         /* See if newworld or oldworld */
 310         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
 311                 if (get_property(ic, "interrupt-controller", NULL))
 312                         break;
 313         pmac_newworld = (ic != NULL);
 314         if (ic)
 315                 of_node_put(ic);
 316
 317         /* Lookup PCI hosts */
 318         pmac_pci_init();
 319
 320 #ifdef CONFIG_PPC32
 321         ohare_init();
 322         l2cr_init();
 323 #endif /* CONFIG_PPC32 */
 324
 325 #ifdef CONFIG_PPC64
 326         /* Probe motherboard chipset */
 327         /* this is done earlier in setup_arch for 32-bit */
 328         pmac_feature_init();
 329
 330         /* We can NAP */
 331         powersave_nap = 1;
 332         printk(KERN_INFO "Using native/NAP idle loop\n");
 333 #endif
 334
 335 #ifdef CONFIG_KGDB
 336         zs_kgdb_hook(0);
 337 #endif
 338
 339         find_via_cuda();
 340         find_via_pmu();
 341         smu_init();
 342
 343 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
 344         pmac_nvram_init();
 345 #endif
 346
 347 #ifdef CONFIG_PPC32
 348 #ifdef CONFIG_BLK_DEV_INITRD
 349         if (initrd_start)
 350                 ROOT_DEV = Root_RAM0;
 351         else
 352 #endif
 353                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 354 #endif
 355
 356 #ifdef CONFIG_SMP
 357         /* Check for Core99 */
 358         if (find_devices("uni-n") || find_devices("u3"))
 359                 smp_ops = &core99_smp_ops;
 360 #ifdef CONFIG_PPC32
 361         else
 362                 smp_ops = &psurge_smp_ops;
 363 #endif
 364 #endif /* CONFIG_SMP */
 365 }
 366
 367 char *bootpath;
 368 char *bootdevice;
 369 void *boot_host;
 370 int boot_target;
 371 int boot_part;
 372 extern dev_t boot_dev;
 373
 374 #ifdef CONFIG_SCSI
 375 void __init note_scsi_host(struct device_node *node, void *host)
 376 {
 377         int l;
 378         char *p;
 379
 380         l = strlen(node->full_name);
 381         if (bootpath != NULL && bootdevice != NULL
 382             && strncmp(node->full_name, bootdevice, l) == 0
 383             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 384                 boot_host = host;
 385                 /*
 386                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 387                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 388                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 389                  * That is, the scsi target number doesn't get preserved.
 390                  * So we pick the target number out of bootpath and use that.
 391                  */
 392                 p = strstr(bootpath, "/sd@");
 393                 if (p != NULL) {
 394                         p += 4;
 395                         boot_target = simple_strtoul(p, NULL, 10);
 396                         p = strchr(p, ':');
 397                         if (p != NULL)
 398                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 399                 }
 400         }
 401 }
 402 EXPORT_SYMBOL(note_scsi_host);
 403 #endif
 404
 405 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 406 static dev_t __init find_ide_boot(void)
 407 {
 408         char *p;
 409         int n;
 410         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 411
 412         if (bootdevice == NULL)
 413                 return 0;
 414         p = strrchr(bootdevice, '/');
 415         if (p == NULL)
 416                 return 0;
 417         n = p - bootdevice;
 418
 419         return pmac_find_ide_boot(bootdevice, n);
 420 }
 421 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 422
 423 static void __init find_boot_device(void)
 424 {
 425 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 426         boot_dev = find_ide_boot();
 427 #endif
 428 }
 429
 430 /* TODO: Merge the suspend-to-ram with the common code !!!
 431  * currently, this is a stub implementation for suspend-to-disk
 432  * only
 433  */
 434
 435 #ifdef CONFIG_SOFTWARE_SUSPEND
 436
 437 static int pmac_pm_prepare(suspend_state_t state)
 438 {
 439         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 440
 441         return 0;
 442 }
 443
 444 static int pmac_pm_enter(suspend_state_t state)
 445 {
 446         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 447
 448         /* Giveup the lazy FPU & vec so we don't have to back them
 449          * up from the low level code
 450          */
 451         enable_kernel_fp();
 452
 453 #ifdef CONFIG_ALTIVEC
 454         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 455                 enable_kernel_altivec();
 456 #endif /* CONFIG_ALTIVEC */
 457
 458         return 0;
 459 }
 460
 461 static int pmac_pm_finish(suspend_state_t state)
 462 {
 463         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 464
 465         /* Restore userland MMU context */
 466         set_context(current->active_mm->context, current->active_mm->pgd);
 467
 468         return 0;
 469 }
 470
 471 static struct pm_ops pmac_pm_ops = {
 472         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 473         .prepare        = pmac_pm_prepare,
 474         .enter          = pmac_pm_enter,
 475         .finish         = pmac_pm_finish,
 476 };
 477
 478 #endif /* CONFIG_SOFTWARE_SUSPEND */
 479
 480 static int initializing = 1;
 481
 482 static int pmac_late_init(void)
 483 {
 484         initializing = 0;
 485 #ifdef CONFIG_SOFTWARE_SUSPEND
 486         pm_set_ops(&pmac_pm_ops);
 487 #endif /* CONFIG_SOFTWARE_SUSPEND */
 488         return 0;
 489 }
 490
 491 late_initcall(pmac_late_init);
 492
 493 /* can't be __init - can be called whenever a disk is first accessed */
 494 void note_bootable_part(dev_t dev, int part, int goodness)
 495 {
 496         static int found_boot = 0;
 497         char *p;
 498
 499         if (!initializing)
 500                 return;
 501         if ((goodness <= current_root_goodness) &&
 502             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 503                 return;
 504         p = strstr(saved_command_line, "root=");
 505         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 506                 return;
 507
 508         if (!found_boot) {
 509                 find_boot_device();
 510                 found_boot = 1;
 511         }
 512         if (!boot_dev || dev == boot_dev) {
 513                 ROOT_DEV = dev + part;
 514                 boot_dev = 0;
 515                 current_root_goodness = goodness;
 516         }
 517 }
 518
 519 #ifdef CONFIG_ADB_CUDA
 520 static void cuda_restart(void)
 521 {
 522         struct adb_request req;
 523
 524         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
 525         for (;;)
 526                 cuda_poll();
 527 }
 528
 529 static void cuda_shutdown(void)
 530 {
 531         struct adb_request req;
 532
 533         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
 534         for (;;)
 535                 cuda_poll();
 536 }
 537
 538 #else
 539 #define cuda_restart()
 540 #define cuda_shutdown()
 541 #endif
 542
 543 #ifndef CONFIG_ADB_PMU
 544 #define pmu_restart()
 545 #define pmu_shutdown()
 546 #endif
 547
 548 #ifndef CONFIG_PMAC_SMU
 549 #define smu_restart()
 550 #define smu_shutdown()
 551 #endif
 552
 553 static void pmac_restart(char *cmd)
 554 {
 555         switch (sys_ctrler) {
 556         case SYS_CTRLER_CUDA:
 557                 cuda_restart();
 558                 break;
 559         case SYS_CTRLER_PMU:
 560                 pmu_restart();
 561                 break;
 562         case SYS_CTRLER_SMU:
 563                 smu_restart();
 564                 break;
 565         default: ;
 566         }
 567 }
 568
 569 static void pmac_power_off(void)
 570 {
 571         switch (sys_ctrler) {
 572         case SYS_CTRLER_CUDA:
 573                 cuda_shutdown();
 574                 break;
 575         case SYS_CTRLER_PMU:
 576                 pmu_shutdown();
 577                 break;
 578         case SYS_CTRLER_SMU:
 579                 smu_shutdown();
 580                 break;
 581         default: ;
 582         }
 583 }
 584
 585 static void
 586 pmac_halt(void)
 587 {
 588         pmac_power_off();
 589 }
 590
 591 #ifdef CONFIG_PPC32
 592 void __init pmac_init(void)
 593 {
 594         /* isa_io_base gets set in pmac_pci_init */
 595         isa_mem_base = PMAC_ISA_MEM_BASE;
 596         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 597         ISA_DMA_THRESHOLD = ~0L;
 598         DMA_MODE_READ = 1;
 599         DMA_MODE_WRITE = 2;
 600
 601         ppc_md = pmac_md;
 602
 603 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 604 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 605         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 606         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 607 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 608 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 609
 610         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 611
 612 }
 613 #endif
 614
 615 /*
 616  * Early initialization.
 617  */
 618 static void __init pmac_init_early(void)
 619 {
 620 #ifdef CONFIG_PPC64
 621         /* Initialize hash table, from now on, we can take hash faults
 622          * and call ioremap
 623          */
 624         hpte_init_native();
 625
 626         /* Init SCC */
 627         if (strstr(cmd_line, "sccdbg")) {
 628                 sccdbg = 1;
 629                 udbg_init_scc(NULL);
 630         }
 631
 632         /* Setup interrupt mapping options */
 633         ppc64_interrupt_controller = IC_OPEN_PIC;
 634
 635         iommu_init_early_u3();
 636 #endif
 637 }
 638
 639 static void __init pmac_progress(char *s, unsigned short hex)
 640 {
 641 #ifdef CONFIG_PPC64
 642         if (sccdbg) {
 643                 udbg_puts(s);
 644                 udbg_puts("\n");
 645                 return;
 646         }
 647 #endif
 648 #ifdef CONFIG_BOOTX_TEXT
 649         if (boot_text_mapped) {
 650                 btext_drawstring(s);
 651                 btext_drawchar('\n');
 652         }
 653 #endif /* CONFIG_BOOTX_TEXT */
 654 }
 655
 656 /*
 657  * pmac has no legacy IO, anything calling this function has to
 658  * fail or bad things will happen
 659  */
 660 static int pmac_check_legacy_ioport(unsigned int baseport)
 661 {
 662         return -ENODEV;
 663 }
 664
 665 static int __init pmac_declare_of_platform_devices(void)
 666 {
 667         struct device_node *np, *npp;
 668
 669         np = find_devices("uni-n");
 670         if (np) {
 671                 for (np = np->child; np != NULL; np = np->sibling)
 672                         if (strncmp(np->name, "i2c", 3) == 0) {
 673                                 of_platform_device_create(np, "uni-n-i2c",
 674                                                           NULL);
 675                                 break;
 676                         }
 677         }
 678         np = find_devices("valkyrie");
 679         if (np)
 680                 of_platform_device_create(np, "valkyrie", NULL);
 681         np = find_devices("platinum");
 682         if (np)
 683                 of_platform_device_create(np, "platinum", NULL);
 684
 685         npp = of_find_node_by_name(NULL, "u3");
 686         if (npp) {
 687                 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
 688                         if (strncmp(np->name, "i2c", 3) == 0) {
 689                                 of_platform_device_create(np, "u3-i2c", NULL);
 690                                 of_node_put(np);
 691                                 break;
 692                         }
 693                 }
 694                 of_node_put(npp);
 695         }
 696         np = of_find_node_by_type(NULL, "smu");
 697         if (np) {
 698                 of_platform_device_create(np, "smu", NULL);
 699                 of_node_put(np);
 700         }
 701
 702         return 0;
 703 }
 704
 705 device_initcall(pmac_declare_of_platform_devices);
 706
 707 /*
 708  * Called very early, MMU is off, device-tree isn't unflattened
 709  */
 710 static int __init pmac_probe(int platform)
 711 {
 712 #ifdef CONFIG_PPC64
 713         if (platform != PLATFORM_POWERMAC)
 714                 return 0;
 715
 716         /*
 717          * On U3, the DART (iommu) must be allocated now since it
 718          * has an impact on htab_initialize (due to the large page it
 719          * occupies having to be broken up so the DART itself is not
 720          * part of the cacheable linar mapping
 721          */
 722         alloc_u3_dart_table();
 723 #endif
 724
 725 #ifdef CONFIG_PMAC_SMU
 726         /*
 727          * SMU based G5s need some memory below 2Gb, at least the current
 728          * driver needs that. We have to allocate it now. We allocate 4k
 729          * (1 small page) for now.
 730          */
 731         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 732 #endif /* CONFIG_PMAC_SMU */
 733
 734         return 1;
 735 }
 736
 737 #ifdef CONFIG_PPC64
 738 static int pmac_probe_mode(struct pci_bus *bus)
 739 {
 740         struct device_node *node = bus->sysdata;
 741
 742         /* We need to use normal PCI probing for the AGP bus,
 743            since the device for the AGP bridge isn't in the tree. */
 744         if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
 745                 return PCI_PROBE_NORMAL;
 746
 747         return PCI_PROBE_DEVTREE;
 748 }
 749 #endif
 750
 751 struct machdep_calls __initdata pmac_md = {
 752 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
 753         .cpu_die                = generic_mach_cpu_die,
 754 #endif
 755         .probe                  = pmac_probe,
 756         .setup_arch             = pmac_setup_arch,
 757         .init_early             = pmac_init_early,
 758         .show_cpuinfo           = pmac_show_cpuinfo,
 759         .init_IRQ               = pmac_pic_init,
 760         .get_irq                = mpic_get_irq, /* changed later */
 761         .pcibios_fixup          = pmac_pcibios_fixup,
 762         .restart                = pmac_restart,
 763         .power_off              = pmac_power_off,
 764         .halt                   = pmac_halt,
 765         .time_init              = pmac_time_init,
 766         .get_boot_time          = pmac_get_boot_time,
 767         .set_rtc_time           = pmac_set_rtc_time,
 768         .get_rtc_time           = pmac_get_rtc_time,
 769         .calibrate_decr         = pmac_calibrate_decr,
 770         .feature_call           = pmac_do_feature_call,
 771         .check_legacy_ioport    = pmac_check_legacy_ioport,
 772         .progress               = pmac_progress,
 773 #ifdef CONFIG_PPC64
 774         .pci_probe_mode         = pmac_probe_mode,
 775         .idle_loop              = native_idle,
 776         .enable_pmcs            = power4_enable_pmcs,
 777 #ifdef CONFIG_KEXEC
 778         .machine_kexec          = default_machine_kexec,
 779         .machine_kexec_prepare  = default_machine_kexec_prepare,
 780 #endif
 781 #endif /* CONFIG_PPC64 */
 782 #ifdef CONFIG_PPC32
 783         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
 784         .pcibios_after_init     = pmac_pcibios_after_init,
 785         .phys_mem_access_prot   = pci_phys_mem_access_prot,
 786 #endif
 787 };