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