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