git.oblomov.eu Git - linux-2.6/blob - 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/pci-bridge.h>
  64 #include <asm/ohare.h>
  65 #include <asm/mediabay.h>
  66 #include <asm/machdep.h>
  67 #include <asm/dma.h>
  68 #include <asm/cputable.h>
  69 #include <asm/btext.h>
  70 #include <asm/pmac_feature.h>
  71 #include <asm/time.h>
  72 #include <asm/of_device.h>
  73 #include <asm/mmu_context.h>
  74 #include <asm/iommu.h>
  75 #include <asm/smu.h>
  76 #include <asm/pmc.h>
  77 #include <asm/mpic.h>
  78 #include <asm/lmb.h>
  79
  80 #include "pmac.h"
  81
  82 #undef SHOW_GATWICK_IRQS
  83
  84 unsigned char drive_info;
  85
  86 int ppc_override_l2cr = 0;
  87 int ppc_override_l2cr_value;
  88 int has_l2cache = 0;
  89
  90 int pmac_newworld = 1;
  91
  92 static int current_root_goodness = -1;
  93
  94 extern int pmac_newworld;
  95 extern struct machdep_calls pmac_md;
  96
  97 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
  98
  99 #ifdef CONFIG_PPC64
 100 #include <asm/udbg.h>
 101 int sccdbg;
 102 #endif
 103
 104 extern void zs_kgdb_hook(int tty_num);
 105
 106 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
 107 EXPORT_SYMBOL(sys_ctrler);
 108
 109 #ifdef CONFIG_PMAC_SMU
 110 unsigned long smu_cmdbuf_abs;
 111 EXPORT_SYMBOL(smu_cmdbuf_abs);
 112 #endif
 113
 114 #ifdef CONFIG_SMP
 115 extern struct smp_ops_t psurge_smp_ops;
 116 extern struct smp_ops_t core99_smp_ops;
 117 #endif /* CONFIG_SMP */
 118
 119 static void pmac_show_cpuinfo(struct seq_file *m)
 120 {
 121         struct device_node *np;
 122         char *pp;
 123         int plen;
 124         int mbmodel;
 125         unsigned int mbflags;
 126         char* mbname;
 127
 128         mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 129                                     PMAC_MB_INFO_MODEL, 0);
 130         mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 131                                     PMAC_MB_INFO_FLAGS, 0);
 132         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
 133                               (long) &mbname) != 0)
 134                 mbname = "Unknown";
 135
 136         /* find motherboard type */
 137         seq_printf(m, "machine\t\t: ");
 138         np = of_find_node_by_path("/");
 139         if (np != NULL) {
 140                 pp = (char *) get_property(np, "model", NULL);
 141                 if (pp != NULL)
 142                         seq_printf(m, "%s\n", pp);
 143                 else
 144                         seq_printf(m, "PowerMac\n");
 145                 pp = (char *) get_property(np, "compatible", &plen);
 146                 if (pp != NULL) {
 147                         seq_printf(m, "motherboard\t:");
 148                         while (plen > 0) {
 149                                 int l = strlen(pp) + 1;
 150                                 seq_printf(m, " %s", pp);
 151                                 plen -= l;
 152                                 pp += l;
 153                         }
 154                         seq_printf(m, "\n");
 155                 }
 156                 of_node_put(np);
 157         } else
 158                 seq_printf(m, "PowerMac\n");
 159
 160         /* print parsed model */
 161         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
 162         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 163
 164         /* find l2 cache info */
 165         np = of_find_node_by_name(NULL, "l2-cache");
 166         if (np == NULL)
 167                 np = of_find_node_by_type(NULL, "cache");
 168         if (np != NULL) {
 169                 unsigned int *ic = (unsigned int *)
 170                         get_property(np, "i-cache-size", NULL);
 171                 unsigned int *dc = (unsigned int *)
 172                         get_property(np, "d-cache-size", NULL);
 173                 seq_printf(m, "L2 cache\t:");
 174                 has_l2cache = 1;
 175                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
 176                         seq_printf(m, " %dK unified", *dc / 1024);
 177                 } else {
 178                         if (ic)
 179                                 seq_printf(m, " %dK instruction", *ic / 1024);
 180                         if (dc)
 181                                 seq_printf(m, "%s %dK data",
 182                                            (ic? " +": ""), *dc / 1024);
 183                 }
 184                 pp = get_property(np, "ram-type", NULL);
 185                 if (pp)
 186                         seq_printf(m, " %s", pp);
 187                 seq_printf(m, "\n");
 188                 of_node_put(np);
 189         }
 190
 191         /* Indicate newworld/oldworld */
 192         seq_printf(m, "pmac-generation\t: %s\n",
 193                    pmac_newworld ? "NewWorld" : "OldWorld");
 194 }
 195
 196 #ifndef CONFIG_ADB_CUDA
 197 int find_via_cuda(void)
 198 {
 199         if (!find_devices("via-cuda"))
 200                 return 0;
 201         printk("WARNING ! Your machine is CUDA-based but your kernel\n");
 202         printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
 203         return 0;
 204 }
 205 #endif
 206
 207 #ifndef CONFIG_ADB_PMU
 208 int find_via_pmu(void)
 209 {
 210         if (!find_devices("via-pmu"))
 211                 return 0;
 212         printk("WARNING ! Your machine is PMU-based but your kernel\n");
 213         printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
 214         return 0;
 215 }
 216 #endif
 217
 218 #ifndef CONFIG_PMAC_SMU
 219 int smu_init(void)
 220 {
 221         /* should check and warn if SMU is present */
 222         return 0;
 223 }
 224 #endif
 225
 226 #ifdef CONFIG_PPC32
 227 static volatile u32 *sysctrl_regs;
 228
 229 static void __init ohare_init(void)
 230 {
 231         /* this area has the CPU identification register
 232            and some registers used by smp boards */
 233         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 234
 235         /*
 236          * Turn on the L2 cache.
 237          * We assume that we have a PSX memory controller iff
 238          * we have an ohare I/O controller.
 239          */
 240         if (find_devices("ohare") != NULL) {
 241                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
 242                         if (sysctrl_regs[4] & 0x10)
 243                                 sysctrl_regs[4] |= 0x04000020;
 244                         else
 245                                 sysctrl_regs[4] |= 0x04000000;
 246                         if(has_l2cache)
 247                                 printk(KERN_INFO "Level 2 cache enabled\n");
 248                 }
 249         }
 250 }
 251
 252 static void __init l2cr_init(void)
 253 {
 254         /* Checks "l2cr-value" property in the registry */
 255         if (cpu_has_feature(CPU_FTR_L2CR)) {
 256                 struct device_node *np = find_devices("cpus");
 257                 if (np == 0)
 258                         np = find_type_devices("cpu");
 259                 if (np != 0) {
 260                         unsigned int *l2cr = (unsigned int *)
 261                                 get_property(np, "l2cr-value", NULL);
 262                         if (l2cr != 0) {
 263                                 ppc_override_l2cr = 1;
 264                                 ppc_override_l2cr_value = *l2cr;
 265                                 _set_L2CR(0);
 266                                 _set_L2CR(ppc_override_l2cr_value);
 267                         }
 268                 }
 269         }
 270
 271         if (ppc_override_l2cr)
 272                 printk(KERN_INFO "L2CR overridden (0x%x), "
 273                        "backside cache is %s\n",
 274                        ppc_override_l2cr_value,
 275                        (ppc_override_l2cr_value & 0x80000000)
 276                                 ? "enabled" : "disabled");
 277 }
 278 #endif
 279
 280 void __init pmac_setup_arch(void)
 281 {
 282         struct device_node *cpu, *ic;
 283         int *fp;
 284         unsigned long pvr;
 285
 286         pvr = PVR_VER(mfspr(SPRN_PVR));
 287
 288         /* Set loops_per_jiffy to a half-way reasonable value,
 289            for use until calibrate_delay gets called. */
 290         loops_per_jiffy = 50000000 / HZ;
 291         cpu = of_find_node_by_type(NULL, "cpu");
 292         if (cpu != NULL) {
 293                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 294                 if (fp != NULL) {
 295                         if (pvr >= 0x30 && pvr < 0x80)
 296                                 /* PPC970 etc. */
 297                                 loops_per_jiffy = *fp / (3 * HZ);
 298                         else if (pvr == 4 || pvr >= 8)
 299                                 /* 604, G3, G4 etc. */
 300                                 loops_per_jiffy = *fp / HZ;
 301                         else
 302                                 /* 601, 603, etc. */
 303                                 loops_per_jiffy = *fp / (2 * HZ);
 304                 }
 305                 of_node_put(cpu);
 306         }
 307
 308         /* See if newworld or oldworld */
 309         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
 310                 if (get_property(ic, "interrupt-controller", NULL))
 311                         break;
 312         pmac_newworld = (ic != NULL);
 313         if (ic)
 314                 of_node_put(ic);
 315
 316         /* Lookup PCI hosts */
 317         pmac_pci_init();
 318
 319 #ifdef CONFIG_PPC32
 320         ohare_init();
 321         l2cr_init();
 322 #endif /* CONFIG_PPC32 */
 323
 324 #ifdef CONFIG_PPC64
 325         /* Probe motherboard chipset */
 326         /* this is done earlier in setup_arch for 32-bit */
 327         pmac_feature_init();
 328
 329         /* We can NAP */
 330         powersave_nap = 1;
 331         printk(KERN_INFO "Using native/NAP idle loop\n");
 332 #endif
 333
 334 #ifdef CONFIG_KGDB
 335         zs_kgdb_hook(0);
 336 #endif
 337
 338         find_via_cuda();
 339         find_via_pmu();
 340         smu_init();
 341
 342 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
 343         pmac_nvram_init();
 344 #endif
 345
 346 #ifdef CONFIG_PPC32
 347 #ifdef CONFIG_BLK_DEV_INITRD
 348         if (initrd_start)
 349                 ROOT_DEV = Root_RAM0;
 350         else
 351 #endif
 352                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 353 #endif
 354
 355 #ifdef CONFIG_SMP
 356         /* Check for Core99 */
 357         if (find_devices("uni-n") || find_devices("u3"))
 358                 smp_ops = &core99_smp_ops;
 359 #ifdef CONFIG_PPC32
 360         else
 361                 smp_ops = &psurge_smp_ops;
 362 #endif
 363 #endif /* CONFIG_SMP */
 364 }
 365
 366 char *bootpath;
 367 char *bootdevice;
 368 void *boot_host;
 369 int boot_target;
 370 int boot_part;
 371 extern dev_t boot_dev;
 372
 373 #ifdef CONFIG_SCSI
 374 void __init note_scsi_host(struct device_node *node, void *host)
 375 {
 376         int l;
 377         char *p;
 378
 379         l = strlen(node->full_name);
 380         if (bootpath != NULL && bootdevice != NULL
 381             && strncmp(node->full_name, bootdevice, l) == 0
 382             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 383                 boot_host = host;
 384                 /*
 385                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 386                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 387                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 388                  * That is, the scsi target number doesn't get preserved.
 389                  * So we pick the target number out of bootpath and use that.
 390                  */
 391                 p = strstr(bootpath, "/sd@");
 392                 if (p != NULL) {
 393                         p += 4;
 394                         boot_target = simple_strtoul(p, NULL, 10);
 395                         p = strchr(p, ':');
 396                         if (p != NULL)
 397                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 398                 }
 399         }
 400 }
 401 EXPORT_SYMBOL(note_scsi_host);
 402 #endif
 403
 404 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 405 static dev_t __init find_ide_boot(void)
 406 {
 407         char *p;
 408         int n;
 409         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 410
 411         if (bootdevice == NULL)
 412                 return 0;
 413         p = strrchr(bootdevice, '/');
 414         if (p == NULL)
 415                 return 0;
 416         n = p - bootdevice;
 417
 418         return pmac_find_ide_boot(bootdevice, n);
 419 }
 420 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 421
 422 static void __init find_boot_device(void)
 423 {
 424 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 425         boot_dev = find_ide_boot();
 426 #endif
 427 }
 428
 429 /* TODO: Merge the suspend-to-ram with the common code !!!
 430  * currently, this is a stub implementation for suspend-to-disk
 431  * only
 432  */
 433
 434 #ifdef CONFIG_SOFTWARE_SUSPEND
 435
 436 static int pmac_pm_prepare(suspend_state_t state)
 437 {
 438         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 439
 440         return 0;
 441 }
 442
 443 static int pmac_pm_enter(suspend_state_t state)
 444 {
 445         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 446
 447         /* Giveup the lazy FPU & vec so we don't have to back them
 448          * up from the low level code
 449          */
 450         enable_kernel_fp();
 451
 452 #ifdef CONFIG_ALTIVEC
 453         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 454                 enable_kernel_altivec();
 455 #endif /* CONFIG_ALTIVEC */
 456
 457         return 0;
 458 }
 459
 460 static int pmac_pm_finish(suspend_state_t state)
 461 {
 462         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 463
 464         /* Restore userland MMU context */
 465         set_context(current->active_mm->context, current->active_mm->pgd);
 466
 467         return 0;
 468 }
 469
 470 static struct pm_ops pmac_pm_ops = {
 471         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 472         .prepare        = pmac_pm_prepare,
 473         .enter          = pmac_pm_enter,
 474         .finish         = pmac_pm_finish,
 475 };
 476
 477 #endif /* CONFIG_SOFTWARE_SUSPEND */
 478
 479 static int initializing = 1;
 480
 481 static int pmac_late_init(void)
 482 {
 483         initializing = 0;
 484 #ifdef CONFIG_SOFTWARE_SUSPEND
 485         pm_set_ops(&pmac_pm_ops);
 486 #endif /* CONFIG_SOFTWARE_SUSPEND */
 487         return 0;
 488 }
 489
 490 late_initcall(pmac_late_init);
 491
 492 /* can't be __init - can be called whenever a disk is first accessed */
 493 void note_bootable_part(dev_t dev, int part, int goodness)
 494 {
 495         static int found_boot = 0;
 496         char *p;
 497
 498         if (!initializing)
 499                 return;
 500         if ((goodness <= current_root_goodness) &&
 501             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 502                 return;
 503         p = strstr(saved_command_line, "root=");
 504         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 505                 return;
 506
 507         if (!found_boot) {
 508                 find_boot_device();
 509                 found_boot = 1;
 510         }
 511         if (!boot_dev || dev == boot_dev) {
 512                 ROOT_DEV = dev + part;
 513                 boot_dev = 0;
 514                 current_root_goodness = goodness;
 515         }
 516 }
 517
 518 #ifdef CONFIG_ADB_CUDA
 519 static void cuda_restart(void)
 520 {
 521         struct adb_request req;
 522
 523         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
 524         for (;;)
 525                 cuda_poll();
 526 }
 527
 528 static void cuda_shutdown(void)
 529 {
 530         struct adb_request req;
 531
 532         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
 533         for (;;)
 534                 cuda_poll();
 535 }
 536
 537 #else
 538 #define cuda_restart()
 539 #define cuda_shutdown()
 540 #endif
 541
 542 #ifndef CONFIG_ADB_PMU
 543 #define pmu_restart()
 544 #define pmu_shutdown()
 545 #endif
 546
 547 #ifndef CONFIG_PMAC_SMU
 548 #define smu_restart()
 549 #define smu_shutdown()
 550 #endif
 551
 552 static void pmac_restart(char *cmd)
 553 {
 554         switch (sys_ctrler) {
 555         case SYS_CTRLER_CUDA:
 556                 cuda_restart();
 557                 break;
 558         case SYS_CTRLER_PMU:
 559                 pmu_restart();
 560                 break;
 561         case SYS_CTRLER_SMU:
 562                 smu_restart();
 563                 break;
 564         default: ;
 565         }
 566 }
 567
 568 static void pmac_power_off(void)
 569 {
 570         switch (sys_ctrler) {
 571         case SYS_CTRLER_CUDA:
 572                 cuda_shutdown();
 573                 break;
 574         case SYS_CTRLER_PMU:
 575                 pmu_shutdown();
 576                 break;
 577         case SYS_CTRLER_SMU:
 578                 smu_shutdown();
 579                 break;
 580         default: ;
 581         }
 582 }
 583
 584 static void
 585 pmac_halt(void)
 586 {
 587         pmac_power_off();
 588 }
 589
 590 #ifdef CONFIG_PPC32
 591 void __init pmac_init(void)
 592 {
 593         /* isa_io_base gets set in pmac_pci_init */
 594         isa_mem_base = PMAC_ISA_MEM_BASE;
 595         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 596         ISA_DMA_THRESHOLD = ~0L;
 597         DMA_MODE_READ = 1;
 598         DMA_MODE_WRITE = 2;
 599
 600         ppc_md = pmac_md;
 601
 602 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 603 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 604         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 605         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 606 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 607 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 608
 609         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 610
 611 }
 612 #endif
 613
 614 /*
 615  * Early initialization.
 616  */
 617 static void __init pmac_init_early(void)
 618 {
 619 #ifdef CONFIG_PPC64
 620         /* Initialize hash table, from now on, we can take hash faults
 621          * and call ioremap
 622          */
 623         hpte_init_native();
 624
 625         /* Init SCC */
 626         if (strstr(cmd_line, "sccdbg")) {
 627                 sccdbg = 1;
 628                 udbg_init_scc(NULL);
 629         }
 630
 631         /* Setup interrupt mapping options */
 632         ppc64_interrupt_controller = IC_OPEN_PIC;
 633
 634         iommu_init_early_u3();
 635 #endif
 636 }
 637
 638 static void __init pmac_progress(char *s, unsigned short hex)
 639 {
 640 #ifdef CONFIG_PPC64
 641         if (sccdbg) {
 642                 udbg_puts(s);
 643                 udbg_puts("\n");
 644                 return;
 645         }
 646 #endif
 647 #ifdef CONFIG_BOOTX_TEXT
 648         if (boot_text_mapped) {
 649                 btext_drawstring(s);
 650                 btext_drawchar('\n');
 651         }
 652 #endif /* CONFIG_BOOTX_TEXT */
 653 }
 654
 655 /*
 656  * pmac has no legacy IO, anything calling this function has to
 657  * fail or bad things will happen
 658  */
 659 static int pmac_check_legacy_ioport(unsigned int baseport)
 660 {
 661         return -ENODEV;
 662 }
 663
 664 static int __init pmac_declare_of_platform_devices(void)
 665 {
 666         struct device_node *np, *npp;
 667
 668         np = find_devices("uni-n");
 669         if (np) {
 670                 for (np = np->child; np != NULL; np = np->sibling)
 671                         if (strncmp(np->name, "i2c", 3) == 0) {
 672                                 of_platform_device_create(np, "uni-n-i2c",
 673                                                           NULL);
 674                                 break;
 675                         }
 676         }
 677         np = find_devices("valkyrie");
 678         if (np)
 679                 of_platform_device_create(np, "valkyrie", NULL);
 680         np = find_devices("platinum");
 681         if (np)
 682                 of_platform_device_create(np, "platinum", NULL);
 683
 684         npp = of_find_node_by_name(NULL, "u3");
 685         if (npp) {
 686                 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
 687                         if (strncmp(np->name, "i2c", 3) == 0) {
 688                                 of_platform_device_create(np, "u3-i2c", NULL);
 689                                 of_node_put(np);
 690                                 break;
 691                         }
 692                 }
 693                 of_node_put(npp);
 694         }
 695         np = of_find_node_by_type(NULL, "smu");
 696         if (np) {
 697                 of_platform_device_create(np, "smu", NULL);
 698                 of_node_put(np);
 699         }
 700
 701         return 0;
 702 }
 703
 704 device_initcall(pmac_declare_of_platform_devices);
 705
 706 /*
 707  * Called very early, MMU is off, device-tree isn't unflattened
 708  */
 709 static int __init pmac_probe(int platform)
 710 {
 711 #ifdef CONFIG_PPC64
 712         if (platform != PLATFORM_POWERMAC)
 713                 return 0;
 714
 715         /*
 716          * On U3, the DART (iommu) must be allocated now since it
 717          * has an impact on htab_initialize (due to the large page it
 718          * occupies having to be broken up so the DART itself is not
 719          * part of the cacheable linar mapping
 720          */
 721         alloc_u3_dart_table();
 722 #endif
 723
 724 #ifdef CONFIG_PMAC_SMU
 725         /*
 726          * SMU based G5s need some memory below 2Gb, at least the current
 727          * driver needs that. We have to allocate it now. We allocate 4k
 728          * (1 small page) for now.
 729          */
 730         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 731 #endif /* CONFIG_PMAC_SMU */
 732
 733         return 1;
 734 }
 735
 736 #ifdef CONFIG_PPC64
 737 static int pmac_probe_mode(struct pci_bus *bus)
 738 {
 739         struct device_node *node = bus->sysdata;
 740
 741         /* We need to use normal PCI probing for the AGP bus,
 742            since the device for the AGP bridge isn't in the tree. */
 743         if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
 744                 return PCI_PROBE_NORMAL;
 745
 746         return PCI_PROBE_DEVTREE;
 747 }
 748 #endif
 749
 750 struct machdep_calls __initdata pmac_md = {
 751 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
 752         .cpu_die                = generic_mach_cpu_die,
 753 #endif
 754         .probe                  = pmac_probe,
 755         .setup_arch             = pmac_setup_arch,
 756         .init_early             = pmac_init_early,
 757         .show_cpuinfo           = pmac_show_cpuinfo,
 758         .init_IRQ               = pmac_pic_init,
 759         .get_irq                = mpic_get_irq, /* changed later */
 760         .pcibios_fixup          = pmac_pcibios_fixup,
 761         .restart                = pmac_restart,
 762         .power_off              = pmac_power_off,
 763         .halt                   = pmac_halt,
 764         .time_init              = pmac_time_init,
 765         .get_boot_time          = pmac_get_boot_time,
 766         .set_rtc_time           = pmac_set_rtc_time,
 767         .get_rtc_time           = pmac_get_rtc_time,
 768         .calibrate_decr         = pmac_calibrate_decr,
 769         .feature_call           = pmac_do_feature_call,
 770         .check_legacy_ioport    = pmac_check_legacy_ioport,
 771         .progress               = pmac_progress,
 772 #ifdef CONFIG_PPC64
 773         .pci_probe_mode         = pmac_probe_mode,
 774         .idle_loop              = native_idle,
 775         .enable_pmcs            = power4_enable_pmcs,
 776 #endif
 777 #ifdef CONFIG_PPC32
 778         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
 779         .pcibios_after_init     = pmac_pcibios_after_init,
 780         .phys_mem_access_prot   = pci_phys_mem_access_prot,
 781 #endif
 782 };