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   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
  79 #include "pmac.h"
  80
  81 #undef SHOW_GATWICK_IRQS
  82
  83 unsigned char drive_info;
  84
  85 int ppc_override_l2cr = 0;
  86 int ppc_override_l2cr_value;
  87 int has_l2cache = 0;
  88
  89 int pmac_newworld = 1;
  90
  91 static int current_root_goodness = -1;
  92
  93 extern int pmac_newworld;
  94 extern struct machdep_calls pmac_md;
  95
  96 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
  97
  98 #ifdef CONFIG_PPC64
  99 #include <asm/udbg.h>
 100 int sccdbg;
 101 #endif
 102
 103 extern void zs_kgdb_hook(int tty_num);
 104
 105 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
 106 EXPORT_SYMBOL(sys_ctrler);
 107
 108 #ifdef CONFIG_PMAC_SMU
 109 unsigned long smu_cmdbuf_abs;
 110 EXPORT_SYMBOL(smu_cmdbuf_abs);
 111 #endif
 112
 113 #ifdef CONFIG_SMP
 114 extern struct smp_ops_t psurge_smp_ops;
 115 extern struct smp_ops_t core99_smp_ops;
 116 #endif /* CONFIG_SMP */
 117
 118 static void pmac_show_cpuinfo(struct seq_file *m)
 119 {
 120         struct device_node *np;
 121         char *pp;
 122         int plen;
 123         int mbmodel;
 124         unsigned int mbflags;
 125         char* mbname;
 126
 127         mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 128                                     PMAC_MB_INFO_MODEL, 0);
 129         mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 130                                     PMAC_MB_INFO_FLAGS, 0);
 131         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
 132                               (long) &mbname) != 0)
 133                 mbname = "Unknown";
 134
 135         /* find motherboard type */
 136         seq_printf(m, "machine\t\t: ");
 137         np = of_find_node_by_path("/");
 138         if (np != NULL) {
 139                 pp = (char *) get_property(np, "model", NULL);
 140                 if (pp != NULL)
 141                         seq_printf(m, "%s\n", pp);
 142                 else
 143                         seq_printf(m, "PowerMac\n");
 144                 pp = (char *) get_property(np, "compatible", &plen);
 145                 if (pp != NULL) {
 146                         seq_printf(m, "motherboard\t:");
 147                         while (plen > 0) {
 148                                 int l = strlen(pp) + 1;
 149                                 seq_printf(m, " %s", pp);
 150                                 plen -= l;
 151                                 pp += l;
 152                         }
 153                         seq_printf(m, "\n");
 154                 }
 155                 of_node_put(np);
 156         } else
 157                 seq_printf(m, "PowerMac\n");
 158
 159         /* print parsed model */
 160         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
 161         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 162
 163         /* find l2 cache info */
 164         np = of_find_node_by_name(NULL, "l2-cache");
 165         if (np == NULL)
 166                 np = of_find_node_by_type(NULL, "cache");
 167         if (np != NULL) {
 168                 unsigned int *ic = (unsigned int *)
 169                         get_property(np, "i-cache-size", NULL);
 170                 unsigned int *dc = (unsigned int *)
 171                         get_property(np, "d-cache-size", NULL);
 172                 seq_printf(m, "L2 cache\t:");
 173                 has_l2cache = 1;
 174                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
 175                         seq_printf(m, " %dK unified", *dc / 1024);
 176                 } else {
 177                         if (ic)
 178                                 seq_printf(m, " %dK instruction", *ic / 1024);
 179                         if (dc)
 180                                 seq_printf(m, "%s %dK data",
 181                                            (ic? " +": ""), *dc / 1024);
 182                 }
 183                 pp = get_property(np, "ram-type", NULL);
 184                 if (pp)
 185                         seq_printf(m, " %s", pp);
 186                 seq_printf(m, "\n");
 187                 of_node_put(np);
 188         }
 189
 190         /* Indicate newworld/oldworld */
 191         seq_printf(m, "pmac-generation\t: %s\n",
 192                    pmac_newworld ? "NewWorld" : "OldWorld");
 193 }
 194
 195 static void pmac_show_percpuinfo(struct seq_file *m, int i)
 196 {
 197 #ifdef CONFIG_CPU_FREQ_PMAC
 198         extern unsigned int pmac_get_one_cpufreq(int i);
 199         unsigned int freq = pmac_get_one_cpufreq(i);
 200         if (freq != 0) {
 201                 seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
 202                 return;
 203         }
 204 #endif /* CONFIG_CPU_FREQ_PMAC */
 205 #ifdef CONFIG_PPC32
 206         of_show_percpuinfo(m, i);
 207 #endif
 208 }
 209
 210 #ifndef CONFIG_ADB_CUDA
 211 int find_via_cuda(void)
 212 {
 213         if (!find_devices("via-cuda"))
 214                 return 0;
 215         printk("WARNING ! Your machine is CUDA-based but your kernel\n");
 216         printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
 217         return 0;
 218 }
 219 #endif
 220
 221 #ifndef CONFIG_ADB_PMU
 222 int find_via_pmu(void)
 223 {
 224         if (!find_devices("via-pmu"))
 225                 return 0;
 226         printk("WARNING ! Your machine is PMU-based but your kernel\n");
 227         printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
 228         return;
 229 }
 230 #endif
 231
 232 #ifndef CONFIG_PMAC_SMU
 233 int smu_init(void)
 234 {
 235         /* should check and warn if SMU is present */
 236         return 0;
 237 }
 238 #endif
 239
 240 #ifdef CONFIG_PPC32
 241 static volatile u32 *sysctrl_regs;
 242
 243 static void __init ohare_init(void)
 244 {
 245         /* this area has the CPU identification register
 246            and some registers used by smp boards */
 247         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 248
 249         /*
 250          * Turn on the L2 cache.
 251          * We assume that we have a PSX memory controller iff
 252          * we have an ohare I/O controller.
 253          */
 254         if (find_devices("ohare") != NULL) {
 255                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
 256                         if (sysctrl_regs[4] & 0x10)
 257                                 sysctrl_regs[4] |= 0x04000020;
 258                         else
 259                                 sysctrl_regs[4] |= 0x04000000;
 260                         if(has_l2cache)
 261                                 printk(KERN_INFO "Level 2 cache enabled\n");
 262                 }
 263         }
 264 }
 265
 266 static void __init l2cr_init(void)
 267 {
 268         /* Checks "l2cr-value" property in the registry */
 269         if (cpu_has_feature(CPU_FTR_L2CR)) {
 270                 struct device_node *np = find_devices("cpus");
 271                 if (np == 0)
 272                         np = find_type_devices("cpu");
 273                 if (np != 0) {
 274                         unsigned int *l2cr = (unsigned int *)
 275                                 get_property(np, "l2cr-value", NULL);
 276                         if (l2cr != 0) {
 277                                 ppc_override_l2cr = 1;
 278                                 ppc_override_l2cr_value = *l2cr;
 279                                 _set_L2CR(0);
 280                                 _set_L2CR(ppc_override_l2cr_value);
 281                         }
 282                 }
 283         }
 284
 285         if (ppc_override_l2cr)
 286                 printk(KERN_INFO "L2CR overridden (0x%x), "
 287                        "backside cache is %s\n",
 288                        ppc_override_l2cr_value,
 289                        (ppc_override_l2cr_value & 0x80000000)
 290                                 ? "enabled" : "disabled");
 291 }
 292 #endif
 293
 294 void __init pmac_setup_arch(void)
 295 {
 296         struct device_node *cpu;
 297         int *fp;
 298         unsigned long pvr;
 299
 300         pvr = PVR_VER(mfspr(SPRN_PVR));
 301
 302         /* Set loops_per_jiffy to a half-way reasonable value,
 303            for use until calibrate_delay gets called. */
 304         loops_per_jiffy = 50000000 / HZ;
 305         cpu = of_find_node_by_type(NULL, "cpu");
 306         if (cpu != NULL) {
 307                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 308                 if (fp != NULL) {
 309                         if (pvr >= 0x30 && pvr < 0x80)
 310                                 /* PPC970 etc. */
 311                                 loops_per_jiffy = *fp / (3 * HZ);
 312                         else if (pvr == 4 || pvr >= 8)
 313                                 /* 604, G3, G4 etc. */
 314                                 loops_per_jiffy = *fp / HZ;
 315                         else
 316                                 /* 601, 603, etc. */
 317                                 loops_per_jiffy = *fp / (2 * HZ);
 318                 }
 319                 of_node_put(cpu);
 320         }
 321
 322         /* Lookup PCI hosts */
 323         pmac_pci_init();
 324
 325 #ifdef CONFIG_PPC32
 326         ohare_init();
 327         l2cr_init();
 328 #endif /* CONFIG_PPC32 */
 329
 330 #ifdef CONFIG_PPC64
 331         /* Probe motherboard chipset */
 332         /* this is done earlier in setup_arch for 32-bit */
 333         pmac_feature_init();
 334
 335         /* We can NAP */
 336         powersave_nap = 1;
 337         printk(KERN_INFO "Using native/NAP idle loop\n");
 338 #endif
 339
 340 #ifdef CONFIG_KGDB
 341         zs_kgdb_hook(0);
 342 #endif
 343
 344         find_via_cuda();
 345         find_via_pmu();
 346         smu_init();
 347
 348 #ifdef CONFIG_NVRAM
 349         pmac_nvram_init();
 350 #endif
 351
 352 #ifdef CONFIG_PPC32
 353 #ifdef CONFIG_BLK_DEV_INITRD
 354         if (initrd_start)
 355                 ROOT_DEV = Root_RAM0;
 356         else
 357 #endif
 358                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 359 #endif
 360
 361 #ifdef CONFIG_SMP
 362         /* Check for Core99 */
 363         if (find_devices("uni-n") || find_devices("u3"))
 364                 smp_ops = &core99_smp_ops;
 365 #ifdef CONFIG_PPC32
 366         else
 367                 smp_ops = &psurge_smp_ops;
 368 #endif
 369 #endif /* CONFIG_SMP */
 370 }
 371
 372 char *bootpath;
 373 char *bootdevice;
 374 void *boot_host;
 375 int boot_target;
 376 int boot_part;
 377 extern dev_t boot_dev;
 378
 379 #ifdef CONFIG_SCSI
 380 void __init note_scsi_host(struct device_node *node, void *host)
 381 {
 382         int l;
 383         char *p;
 384
 385         l = strlen(node->full_name);
 386         if (bootpath != NULL && bootdevice != NULL
 387             && strncmp(node->full_name, bootdevice, l) == 0
 388             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 389                 boot_host = host;
 390                 /*
 391                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 392                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 393                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 394                  * That is, the scsi target number doesn't get preserved.
 395                  * So we pick the target number out of bootpath and use that.
 396                  */
 397                 p = strstr(bootpath, "/sd@");
 398                 if (p != NULL) {
 399                         p += 4;
 400                         boot_target = simple_strtoul(p, NULL, 10);
 401                         p = strchr(p, ':');
 402                         if (p != NULL)
 403                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 404                 }
 405         }
 406 }
 407 EXPORT_SYMBOL(note_scsi_host);
 408 #endif
 409
 410 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 411 static dev_t __init find_ide_boot(void)
 412 {
 413         char *p;
 414         int n;
 415         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 416
 417         if (bootdevice == NULL)
 418                 return 0;
 419         p = strrchr(bootdevice, '/');
 420         if (p == NULL)
 421                 return 0;
 422         n = p - bootdevice;
 423
 424         return pmac_find_ide_boot(bootdevice, n);
 425 }
 426 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 427
 428 static void __init find_boot_device(void)
 429 {
 430 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 431         boot_dev = find_ide_boot();
 432 #endif
 433 }
 434
 435 /* TODO: Merge the suspend-to-ram with the common code !!!
 436  * currently, this is a stub implementation for suspend-to-disk
 437  * only
 438  */
 439
 440 #ifdef CONFIG_SOFTWARE_SUSPEND
 441
 442 static int pmac_pm_prepare(suspend_state_t state)
 443 {
 444         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 445
 446         return 0;
 447 }
 448
 449 static int pmac_pm_enter(suspend_state_t state)
 450 {
 451         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 452
 453         /* Giveup the lazy FPU & vec so we don't have to back them
 454          * up from the low level code
 455          */
 456         enable_kernel_fp();
 457
 458 #ifdef CONFIG_ALTIVEC
 459         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 460                 enable_kernel_altivec();
 461 #endif /* CONFIG_ALTIVEC */
 462
 463         return 0;
 464 }
 465
 466 static int pmac_pm_finish(suspend_state_t state)
 467 {
 468         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 469
 470         /* Restore userland MMU context */
 471         set_context(current->active_mm->context, current->active_mm->pgd);
 472
 473         return 0;
 474 }
 475
 476 static struct pm_ops pmac_pm_ops = {
 477         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 478         .prepare        = pmac_pm_prepare,
 479         .enter          = pmac_pm_enter,
 480         .finish         = pmac_pm_finish,
 481 };
 482
 483 #endif /* CONFIG_SOFTWARE_SUSPEND */
 484
 485 static int initializing = 1;
 486
 487 static int pmac_late_init(void)
 488 {
 489         initializing = 0;
 490 #ifdef CONFIG_SOFTWARE_SUSPEND
 491         pm_set_ops(&pmac_pm_ops);
 492 #endif /* CONFIG_SOFTWARE_SUSPEND */
 493         return 0;
 494 }
 495
 496 late_initcall(pmac_late_init);
 497
 498 /* can't be __init - can be called whenever a disk is first accessed */
 499 void note_bootable_part(dev_t dev, int part, int goodness)
 500 {
 501         static int found_boot = 0;
 502         char *p;
 503
 504         if (!initializing)
 505                 return;
 506         if ((goodness <= current_root_goodness) &&
 507             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 508                 return;
 509         p = strstr(saved_command_line, "root=");
 510         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 511                 return;
 512
 513         if (!found_boot) {
 514                 find_boot_device();
 515                 found_boot = 1;
 516         }
 517         if (!boot_dev || dev == boot_dev) {
 518                 ROOT_DEV = dev + part;
 519                 boot_dev = 0;
 520                 current_root_goodness = goodness;
 521         }
 522 }
 523
 524 #ifdef CONFIG_ADB_CUDA
 525 static void cuda_restart(void)
 526 {
 527         struct adb_request req;
 528
 529         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
 530         for (;;)
 531                 cuda_poll();
 532 }
 533
 534 static void cuda_shutdown(void)
 535 {
 536         struct adb_request req;
 537
 538         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
 539         for (;;)
 540                 cuda_poll();
 541 }
 542
 543 #else
 544 #define cuda_restart()
 545 #define cuda_shutdown()
 546 #endif
 547
 548 #ifndef CONFIG_ADB_PMU
 549 #define pmu_restart()
 550 #define pmu_shutdown()
 551 #endif
 552
 553 #ifndef CONFIG_PMAC_SMU
 554 #define smu_restart()
 555 #define smu_shutdown()
 556 #endif
 557
 558 static void pmac_restart(char *cmd)
 559 {
 560         switch (sys_ctrler) {
 561         case SYS_CTRLER_CUDA:
 562                 cuda_restart();
 563                 break;
 564         case SYS_CTRLER_PMU:
 565                 pmu_restart();
 566                 break;
 567         case SYS_CTRLER_SMU:
 568                 smu_restart();
 569                 break;
 570         default: ;
 571         }
 572 }
 573
 574 static void pmac_power_off(void)
 575 {
 576         switch (sys_ctrler) {
 577         case SYS_CTRLER_CUDA:
 578                 cuda_shutdown();
 579                 break;
 580         case SYS_CTRLER_PMU:
 581                 pmu_shutdown();
 582                 break;
 583         case SYS_CTRLER_SMU:
 584                 smu_shutdown();
 585                 break;
 586         default: ;
 587         }
 588 }
 589
 590 static void
 591 pmac_halt(void)
 592 {
 593         pmac_power_off();
 594 }
 595
 596 #ifdef CONFIG_PPC32
 597 void __init pmac_init(void)
 598 {
 599         /* isa_io_base gets set in pmac_pci_init */
 600         isa_mem_base = PMAC_ISA_MEM_BASE;
 601         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 602         ISA_DMA_THRESHOLD = ~0L;
 603         DMA_MODE_READ = 1;
 604         DMA_MODE_WRITE = 2;
 605
 606         ppc_md = pmac_md;
 607
 608 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 609 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 610         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 611         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 612 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 613 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 614
 615         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 616
 617 }
 618 #endif
 619
 620 /*
 621  * Early initialization.
 622  */
 623 static void __init pmac_init_early(void)
 624 {
 625 #ifdef CONFIG_PPC64
 626         /* Initialize hash table, from now on, we can take hash faults
 627          * and call ioremap
 628          */
 629         hpte_init_native();
 630
 631         /* Init SCC */
 632         if (strstr(cmd_line, "sccdbg")) {
 633                 sccdbg = 1;
 634                 udbg_init_scc(NULL);
 635         }
 636
 637         /* Setup interrupt mapping options */
 638         ppc64_interrupt_controller = IC_OPEN_PIC;
 639
 640         iommu_init_early_u3();
 641 #endif
 642 }
 643
 644 static void __init pmac_progress(char *s, unsigned short hex)
 645 {
 646 #ifdef CONFIG_PPC64
 647         if (sccdbg) {
 648                 udbg_puts(s);
 649                 udbg_puts("\n");
 650                 return;
 651         }
 652 #endif
 653 #ifdef CONFIG_BOOTX_TEXT
 654         if (boot_text_mapped) {
 655                 btext_drawstring(s);
 656                 btext_drawchar('\n');
 657         }
 658 #endif /* CONFIG_BOOTX_TEXT */
 659 }
 660
 661 /*
 662  * pmac has no legacy IO, anything calling this function has to
 663  * fail or bad things will happen
 664  */
 665 static int pmac_check_legacy_ioport(unsigned int baseport)
 666 {
 667         return -ENODEV;
 668 }
 669
 670 static int __init pmac_declare_of_platform_devices(void)
 671 {
 672         struct device_node *np, *npp;
 673
 674         np = find_devices("uni-n");
 675         if (np) {
 676                 for (np = np->child; np != NULL; np = np->sibling)
 677                         if (strncmp(np->name, "i2c", 3) == 0) {
 678                                 of_platform_device_create(np, "uni-n-i2c",
 679                                                           NULL);
 680                                 break;
 681                         }
 682         }
 683         np = find_devices("valkyrie");
 684         if (np)
 685                 of_platform_device_create(np, "valkyrie", NULL);
 686         np = find_devices("platinum");
 687         if (np)
 688                 of_platform_device_create(np, "platinum", NULL);
 689
 690         npp = of_find_node_by_name(NULL, "u3");
 691         if (npp) {
 692                 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
 693                         if (strncmp(np->name, "i2c", 3) == 0) {
 694                                 of_platform_device_create(np, "u3-i2c", NULL);
 695                                 of_node_put(np);
 696                                 break;
 697                         }
 698                 }
 699                 of_node_put(npp);
 700         }
 701         np = of_find_node_by_type(NULL, "smu");
 702         if (np) {
 703                 of_platform_device_create(np, "smu", NULL);
 704                 of_node_put(np);
 705         }
 706
 707         return 0;
 708 }
 709
 710 device_initcall(pmac_declare_of_platform_devices);
 711
 712 /*
 713  * Called very early, MMU is off, device-tree isn't unflattened
 714  */
 715 static int __init pmac_probe(int platform)
 716 {
 717 #ifdef CONFIG_PPC64
 718         if (platform != PLATFORM_POWERMAC)
 719                 return 0;
 720
 721         /*
 722          * On U3, the DART (iommu) must be allocated now since it
 723          * has an impact on htab_initialize (due to the large page it
 724          * occupies having to be broken up so the DART itself is not
 725          * part of the cacheable linar mapping
 726          */
 727         alloc_u3_dart_table();
 728 #endif
 729
 730 #ifdef CONFIG_PMAC_SMU
 731         /*
 732          * SMU based G5s need some memory below 2Gb, at least the current
 733          * driver needs that. We have to allocate it now. We allocate 4k
 734          * (1 small page) for now.
 735          */
 736         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 737 #endif /* CONFIG_PMAC_SMU */
 738
 739         return 1;
 740 }
 741
 742 #ifdef CONFIG_PPC64
 743 static int pmac_probe_mode(struct pci_bus *bus)
 744 {
 745         struct device_node *node = bus->sysdata;
 746
 747         /* We need to use normal PCI probing for the AGP bus,
 748            since the device for the AGP bridge isn't in the tree. */
 749         if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
 750                 return PCI_PROBE_NORMAL;
 751
 752         return PCI_PROBE_DEVTREE;
 753 }
 754 #endif
 755
 756 struct machdep_calls __initdata pmac_md = {
 757 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
 758         .cpu_die                = generic_mach_cpu_die,
 759 #endif
 760         .probe                  = pmac_probe,
 761         .setup_arch             = pmac_setup_arch,
 762         .init_early             = pmac_init_early,
 763         .show_cpuinfo           = pmac_show_cpuinfo,
 764         .show_percpuinfo        = pmac_show_percpuinfo,
 765         .init_IRQ               = pmac_pic_init,
 766         .get_irq                = mpic_get_irq, /* changed later */
 767         .pcibios_fixup          = pmac_pcibios_fixup,
 768         .restart                = pmac_restart,
 769         .power_off              = pmac_power_off,
 770         .halt                   = pmac_halt,
 771         .time_init              = pmac_time_init,
 772         .get_boot_time          = pmac_get_boot_time,
 773         .set_rtc_time           = pmac_set_rtc_time,
 774         .get_rtc_time           = pmac_get_rtc_time,
 775         .calibrate_decr         = pmac_calibrate_decr,
 776         .feature_call           = pmac_do_feature_call,
 777         .check_legacy_ioport    = pmac_check_legacy_ioport,
 778         .progress               = pmac_progress,
 779 #ifdef CONFIG_PPC64
 780         .pci_probe_mode         = pmac_probe_mode,
 781         .idle_loop              = native_idle,
 782         .enable_pmcs            = power4_enable_pmcs,
 783 #endif
 784 #ifdef CONFIG_PPC32
 785         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
 786         .pcibios_after_init     = pmac_pcibios_after_init,
 787         .phys_mem_access_prot   = pci_phys_mem_access_prot,
 788 #endif
 789 };