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 static void pmac_show_percpuinfo(struct seq_file *m, int i)
 197 {
 198 #ifdef CONFIG_CPU_FREQ_PMAC
 199         extern unsigned int pmac_get_one_cpufreq(int i);
 200         unsigned int freq = pmac_get_one_cpufreq(i);
 201         if (freq != 0) {
 202                 seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
 203                 return;
 204         }
 205 #endif /* CONFIG_CPU_FREQ_PMAC */
 206 }
 207
 208 #ifndef CONFIG_ADB_CUDA
 209 int find_via_cuda(void)
 210 {
 211         if (!find_devices("via-cuda"))
 212                 return 0;
 213         printk("WARNING ! Your machine is CUDA-based but your kernel\n");
 214         printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
 215         return 0;
 216 }
 217 #endif
 218
 219 #ifndef CONFIG_ADB_PMU
 220 int find_via_pmu(void)
 221 {
 222         if (!find_devices("via-pmu"))
 223                 return 0;
 224         printk("WARNING ! Your machine is PMU-based but your kernel\n");
 225         printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
 226         return 0;
 227 }
 228 #endif
 229
 230 #ifndef CONFIG_PMAC_SMU
 231 int smu_init(void)
 232 {
 233         /* should check and warn if SMU is present */
 234         return 0;
 235 }
 236 #endif
 237
 238 #ifdef CONFIG_PPC32
 239 static volatile u32 *sysctrl_regs;
 240
 241 static void __init ohare_init(void)
 242 {
 243         /* this area has the CPU identification register
 244            and some registers used by smp boards */
 245         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 246
 247         /*
 248          * Turn on the L2 cache.
 249          * We assume that we have a PSX memory controller iff
 250          * we have an ohare I/O controller.
 251          */
 252         if (find_devices("ohare") != NULL) {
 253                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
 254                         if (sysctrl_regs[4] & 0x10)
 255                                 sysctrl_regs[4] |= 0x04000020;
 256                         else
 257                                 sysctrl_regs[4] |= 0x04000000;
 258                         if(has_l2cache)
 259                                 printk(KERN_INFO "Level 2 cache enabled\n");
 260                 }
 261         }
 262 }
 263
 264 static void __init l2cr_init(void)
 265 {
 266         /* Checks "l2cr-value" property in the registry */
 267         if (cpu_has_feature(CPU_FTR_L2CR)) {
 268                 struct device_node *np = find_devices("cpus");
 269                 if (np == 0)
 270                         np = find_type_devices("cpu");
 271                 if (np != 0) {
 272                         unsigned int *l2cr = (unsigned int *)
 273                                 get_property(np, "l2cr-value", NULL);
 274                         if (l2cr != 0) {
 275                                 ppc_override_l2cr = 1;
 276                                 ppc_override_l2cr_value = *l2cr;
 277                                 _set_L2CR(0);
 278                                 _set_L2CR(ppc_override_l2cr_value);
 279                         }
 280                 }
 281         }
 282
 283         if (ppc_override_l2cr)
 284                 printk(KERN_INFO "L2CR overridden (0x%x), "
 285                        "backside cache is %s\n",
 286                        ppc_override_l2cr_value,
 287                        (ppc_override_l2cr_value & 0x80000000)
 288                                 ? "enabled" : "disabled");
 289 }
 290 #endif
 291
 292 void __init pmac_setup_arch(void)
 293 {
 294         struct device_node *cpu, *ic;
 295         int *fp;
 296         unsigned long pvr;
 297
 298         pvr = PVR_VER(mfspr(SPRN_PVR));
 299
 300         /* Set loops_per_jiffy to a half-way reasonable value,
 301            for use until calibrate_delay gets called. */
 302         loops_per_jiffy = 50000000 / HZ;
 303         cpu = of_find_node_by_type(NULL, "cpu");
 304         if (cpu != NULL) {
 305                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 306                 if (fp != NULL) {
 307                         if (pvr >= 0x30 && pvr < 0x80)
 308                                 /* PPC970 etc. */
 309                                 loops_per_jiffy = *fp / (3 * HZ);
 310                         else if (pvr == 4 || pvr >= 8)
 311                                 /* 604, G3, G4 etc. */
 312                                 loops_per_jiffy = *fp / HZ;
 313                         else
 314                                 /* 601, 603, etc. */
 315                                 loops_per_jiffy = *fp / (2 * HZ);
 316                 }
 317                 of_node_put(cpu);
 318         }
 319
 320         /* See if newworld or oldworld */
 321         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
 322                 if (get_property(ic, "interrupt-controller", NULL))
 323                         break;
 324         pmac_newworld = (ic != NULL);
 325         if (ic)
 326                 of_node_put(ic);
 327
 328         /* Lookup PCI hosts */
 329         pmac_pci_init();
 330
 331 #ifdef CONFIG_PPC32
 332         ohare_init();
 333         l2cr_init();
 334 #endif /* CONFIG_PPC32 */
 335
 336 #ifdef CONFIG_PPC64
 337         /* Probe motherboard chipset */
 338         /* this is done earlier in setup_arch for 32-bit */
 339         pmac_feature_init();
 340
 341         /* We can NAP */
 342         powersave_nap = 1;
 343         printk(KERN_INFO "Using native/NAP idle loop\n");
 344 #endif
 345
 346 #ifdef CONFIG_KGDB
 347         zs_kgdb_hook(0);
 348 #endif
 349
 350         find_via_cuda();
 351         find_via_pmu();
 352         smu_init();
 353
 354 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
 355         pmac_nvram_init();
 356 #endif
 357
 358 #ifdef CONFIG_PPC32
 359 #ifdef CONFIG_BLK_DEV_INITRD
 360         if (initrd_start)
 361                 ROOT_DEV = Root_RAM0;
 362         else
 363 #endif
 364                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 365 #endif
 366
 367 #ifdef CONFIG_SMP
 368         /* Check for Core99 */
 369         if (find_devices("uni-n") || find_devices("u3"))
 370                 smp_ops = &core99_smp_ops;
 371 #ifdef CONFIG_PPC32
 372         else
 373                 smp_ops = &psurge_smp_ops;
 374 #endif
 375 #endif /* CONFIG_SMP */
 376 }
 377
 378 char *bootpath;
 379 char *bootdevice;
 380 void *boot_host;
 381 int boot_target;
 382 int boot_part;
 383 extern dev_t boot_dev;
 384
 385 #ifdef CONFIG_SCSI
 386 void __init note_scsi_host(struct device_node *node, void *host)
 387 {
 388         int l;
 389         char *p;
 390
 391         l = strlen(node->full_name);
 392         if (bootpath != NULL && bootdevice != NULL
 393             && strncmp(node->full_name, bootdevice, l) == 0
 394             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 395                 boot_host = host;
 396                 /*
 397                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 398                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 399                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 400                  * That is, the scsi target number doesn't get preserved.
 401                  * So we pick the target number out of bootpath and use that.
 402                  */
 403                 p = strstr(bootpath, "/sd@");
 404                 if (p != NULL) {
 405                         p += 4;
 406                         boot_target = simple_strtoul(p, NULL, 10);
 407                         p = strchr(p, ':');
 408                         if (p != NULL)
 409                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 410                 }
 411         }
 412 }
 413 EXPORT_SYMBOL(note_scsi_host);
 414 #endif
 415
 416 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 417 static dev_t __init find_ide_boot(void)
 418 {
 419         char *p;
 420         int n;
 421         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 422
 423         if (bootdevice == NULL)
 424                 return 0;
 425         p = strrchr(bootdevice, '/');
 426         if (p == NULL)
 427                 return 0;
 428         n = p - bootdevice;
 429
 430         return pmac_find_ide_boot(bootdevice, n);
 431 }
 432 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 433
 434 static void __init find_boot_device(void)
 435 {
 436 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 437         boot_dev = find_ide_boot();
 438 #endif
 439 }
 440
 441 /* TODO: Merge the suspend-to-ram with the common code !!!
 442  * currently, this is a stub implementation for suspend-to-disk
 443  * only
 444  */
 445
 446 #ifdef CONFIG_SOFTWARE_SUSPEND
 447
 448 static int pmac_pm_prepare(suspend_state_t state)
 449 {
 450         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 451
 452         return 0;
 453 }
 454
 455 static int pmac_pm_enter(suspend_state_t state)
 456 {
 457         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 458
 459         /* Giveup the lazy FPU & vec so we don't have to back them
 460          * up from the low level code
 461          */
 462         enable_kernel_fp();
 463
 464 #ifdef CONFIG_ALTIVEC
 465         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 466                 enable_kernel_altivec();
 467 #endif /* CONFIG_ALTIVEC */
 468
 469         return 0;
 470 }
 471
 472 static int pmac_pm_finish(suspend_state_t state)
 473 {
 474         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 475
 476         /* Restore userland MMU context */
 477         set_context(current->active_mm->context, current->active_mm->pgd);
 478
 479         return 0;
 480 }
 481
 482 static struct pm_ops pmac_pm_ops = {
 483         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 484         .prepare        = pmac_pm_prepare,
 485         .enter          = pmac_pm_enter,
 486         .finish         = pmac_pm_finish,
 487 };
 488
 489 #endif /* CONFIG_SOFTWARE_SUSPEND */
 490
 491 static int initializing = 1;
 492
 493 static int pmac_late_init(void)
 494 {
 495         initializing = 0;
 496 #ifdef CONFIG_SOFTWARE_SUSPEND
 497         pm_set_ops(&pmac_pm_ops);
 498 #endif /* CONFIG_SOFTWARE_SUSPEND */
 499         return 0;
 500 }
 501
 502 late_initcall(pmac_late_init);
 503
 504 /* can't be __init - can be called whenever a disk is first accessed */
 505 void note_bootable_part(dev_t dev, int part, int goodness)
 506 {
 507         static int found_boot = 0;
 508         char *p;
 509
 510         if (!initializing)
 511                 return;
 512         if ((goodness <= current_root_goodness) &&
 513             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 514                 return;
 515         p = strstr(saved_command_line, "root=");
 516         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 517                 return;
 518
 519         if (!found_boot) {
 520                 find_boot_device();
 521                 found_boot = 1;
 522         }
 523         if (!boot_dev || dev == boot_dev) {
 524                 ROOT_DEV = dev + part;
 525                 boot_dev = 0;
 526                 current_root_goodness = goodness;
 527         }
 528 }
 529
 530 #ifdef CONFIG_ADB_CUDA
 531 static void cuda_restart(void)
 532 {
 533         struct adb_request req;
 534
 535         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
 536         for (;;)
 537                 cuda_poll();
 538 }
 539
 540 static void cuda_shutdown(void)
 541 {
 542         struct adb_request req;
 543
 544         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
 545         for (;;)
 546                 cuda_poll();
 547 }
 548
 549 #else
 550 #define cuda_restart()
 551 #define cuda_shutdown()
 552 #endif
 553
 554 #ifndef CONFIG_ADB_PMU
 555 #define pmu_restart()
 556 #define pmu_shutdown()
 557 #endif
 558
 559 #ifndef CONFIG_PMAC_SMU
 560 #define smu_restart()
 561 #define smu_shutdown()
 562 #endif
 563
 564 static void pmac_restart(char *cmd)
 565 {
 566         switch (sys_ctrler) {
 567         case SYS_CTRLER_CUDA:
 568                 cuda_restart();
 569                 break;
 570         case SYS_CTRLER_PMU:
 571                 pmu_restart();
 572                 break;
 573         case SYS_CTRLER_SMU:
 574                 smu_restart();
 575                 break;
 576         default: ;
 577         }
 578 }
 579
 580 static void pmac_power_off(void)
 581 {
 582         switch (sys_ctrler) {
 583         case SYS_CTRLER_CUDA:
 584                 cuda_shutdown();
 585                 break;
 586         case SYS_CTRLER_PMU:
 587                 pmu_shutdown();
 588                 break;
 589         case SYS_CTRLER_SMU:
 590                 smu_shutdown();
 591                 break;
 592         default: ;
 593         }
 594 }
 595
 596 static void
 597 pmac_halt(void)
 598 {
 599         pmac_power_off();
 600 }
 601
 602 #ifdef CONFIG_PPC32
 603 void __init pmac_init(void)
 604 {
 605         /* isa_io_base gets set in pmac_pci_init */
 606         isa_mem_base = PMAC_ISA_MEM_BASE;
 607         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 608         ISA_DMA_THRESHOLD = ~0L;
 609         DMA_MODE_READ = 1;
 610         DMA_MODE_WRITE = 2;
 611
 612         ppc_md = pmac_md;
 613
 614 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 615 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 616         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 617         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 618 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 619 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 620
 621         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 622
 623 }
 624 #endif
 625
 626 /*
 627  * Early initialization.
 628  */
 629 static void __init pmac_init_early(void)
 630 {
 631 #ifdef CONFIG_PPC64
 632         /* Initialize hash table, from now on, we can take hash faults
 633          * and call ioremap
 634          */
 635         hpte_init_native();
 636
 637         /* Init SCC */
 638         if (strstr(cmd_line, "sccdbg")) {
 639                 sccdbg = 1;
 640                 udbg_init_scc(NULL);
 641         }
 642
 643         /* Setup interrupt mapping options */
 644         ppc64_interrupt_controller = IC_OPEN_PIC;
 645
 646         iommu_init_early_u3();
 647 #endif
 648 }
 649
 650 static void __init pmac_progress(char *s, unsigned short hex)
 651 {
 652 #ifdef CONFIG_PPC64
 653         if (sccdbg) {
 654                 udbg_puts(s);
 655                 udbg_puts("\n");
 656                 return;
 657         }
 658 #endif
 659 #ifdef CONFIG_BOOTX_TEXT
 660         if (boot_text_mapped) {
 661                 btext_drawstring(s);
 662                 btext_drawchar('\n');
 663         }
 664 #endif /* CONFIG_BOOTX_TEXT */
 665 }
 666
 667 /*
 668  * pmac has no legacy IO, anything calling this function has to
 669  * fail or bad things will happen
 670  */
 671 static int pmac_check_legacy_ioport(unsigned int baseport)
 672 {
 673         return -ENODEV;
 674 }
 675
 676 static int __init pmac_declare_of_platform_devices(void)
 677 {
 678         struct device_node *np, *npp;
 679
 680         np = find_devices("uni-n");
 681         if (np) {
 682                 for (np = np->child; np != NULL; np = np->sibling)
 683                         if (strncmp(np->name, "i2c", 3) == 0) {
 684                                 of_platform_device_create(np, "uni-n-i2c",
 685                                                           NULL);
 686                                 break;
 687                         }
 688         }
 689         np = find_devices("valkyrie");
 690         if (np)
 691                 of_platform_device_create(np, "valkyrie", NULL);
 692         np = find_devices("platinum");
 693         if (np)
 694                 of_platform_device_create(np, "platinum", NULL);
 695
 696         npp = of_find_node_by_name(NULL, "u3");
 697         if (npp) {
 698                 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
 699                         if (strncmp(np->name, "i2c", 3) == 0) {
 700                                 of_platform_device_create(np, "u3-i2c", NULL);
 701                                 of_node_put(np);
 702                                 break;
 703                         }
 704                 }
 705                 of_node_put(npp);
 706         }
 707         np = of_find_node_by_type(NULL, "smu");
 708         if (np) {
 709                 of_platform_device_create(np, "smu", NULL);
 710                 of_node_put(np);
 711         }
 712
 713         return 0;
 714 }
 715
 716 device_initcall(pmac_declare_of_platform_devices);
 717
 718 /*
 719  * Called very early, MMU is off, device-tree isn't unflattened
 720  */
 721 static int __init pmac_probe(int platform)
 722 {
 723 #ifdef CONFIG_PPC64
 724         if (platform != PLATFORM_POWERMAC)
 725                 return 0;
 726
 727         /*
 728          * On U3, the DART (iommu) must be allocated now since it
 729          * has an impact on htab_initialize (due to the large page it
 730          * occupies having to be broken up so the DART itself is not
 731          * part of the cacheable linar mapping
 732          */
 733         alloc_u3_dart_table();
 734 #endif
 735
 736 #ifdef CONFIG_PMAC_SMU
 737         /*
 738          * SMU based G5s need some memory below 2Gb, at least the current
 739          * driver needs that. We have to allocate it now. We allocate 4k
 740          * (1 small page) for now.
 741          */
 742         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 743 #endif /* CONFIG_PMAC_SMU */
 744
 745         return 1;
 746 }
 747
 748 #ifdef CONFIG_PPC64
 749 static int pmac_probe_mode(struct pci_bus *bus)
 750 {
 751         struct device_node *node = bus->sysdata;
 752
 753         /* We need to use normal PCI probing for the AGP bus,
 754            since the device for the AGP bridge isn't in the tree. */
 755         if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
 756                 return PCI_PROBE_NORMAL;
 757
 758         return PCI_PROBE_DEVTREE;
 759 }
 760 #endif
 761
 762 struct machdep_calls __initdata pmac_md = {
 763 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
 764         .cpu_die                = generic_mach_cpu_die,
 765 #endif
 766         .probe                  = pmac_probe,
 767         .setup_arch             = pmac_setup_arch,
 768         .init_early             = pmac_init_early,
 769         .show_cpuinfo           = pmac_show_cpuinfo,
 770         .show_percpuinfo        = pmac_show_percpuinfo,
 771         .init_IRQ               = pmac_pic_init,
 772         .get_irq                = mpic_get_irq, /* changed later */
 773         .pcibios_fixup          = pmac_pcibios_fixup,
 774         .restart                = pmac_restart,
 775         .power_off              = pmac_power_off,
 776         .halt                   = pmac_halt,
 777         .time_init              = pmac_time_init,
 778         .get_boot_time          = pmac_get_boot_time,
 779         .set_rtc_time           = pmac_set_rtc_time,
 780         .get_rtc_time           = pmac_get_rtc_time,
 781         .calibrate_decr         = pmac_calibrate_decr,
 782         .feature_call           = pmac_do_feature_call,
 783         .check_legacy_ioport    = pmac_check_legacy_ioport,
 784         .progress               = pmac_progress,
 785 #ifdef CONFIG_PPC64
 786         .pci_probe_mode         = pmac_probe_mode,
 787         .idle_loop              = native_idle,
 788         .enable_pmcs            = power4_enable_pmcs,
 789 #endif
 790 #ifdef CONFIG_PPC32
 791         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
 792         .pcibios_after_init     = pmac_pcibios_after_init,
 793         .phys_mem_access_prot   = pci_phys_mem_access_prot,
 794 #endif
 795 };