git.oblomov.eu Git - linux-2.6/blob - arch/powerpc/platforms/powermac/setup.c

   1 /*
   2  *  Powermac setup and early boot code plus other random bits.
   3  *
   4  *  PowerPC version
   5  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
   6  *
   7  *  Adapted for Power Macintosh by Paul Mackerras
   8  *    Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
   9  *
  10  *  Derived from "arch/alpha/kernel/setup.c"
  11  *    Copyright (C) 1995 Linus Torvalds
  12  *
  13  *  Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation; either version
  18  *  2 of the License, or (at your option) any later version.
  19  *
  20  */
  21
  22 /*
  23  * bootup setup stuff..
  24  */
  25
  26 #include <linux/config.h>
  27 #include <linux/init.h>
  28 #include <linux/errno.h>
  29 #include <linux/sched.h>
  30 #include <linux/kernel.h>
  31 #include <linux/mm.h>
  32 #include <linux/stddef.h>
  33 #include <linux/unistd.h>
  34 #include <linux/ptrace.h>
  35 #include <linux/slab.h>
  36 #include <linux/user.h>
  37 #include <linux/a.out.h>
  38 #include <linux/tty.h>
  39 #include <linux/string.h>
  40 #include <linux/delay.h>
  41 #include <linux/ioport.h>
  42 #include <linux/major.h>
  43 #include <linux/initrd.h>
  44 #include <linux/vt_kern.h>
  45 #include <linux/console.h>
  46 #include <linux/ide.h>
  47 #include <linux/pci.h>
  48 #include <linux/adb.h>
  49 #include <linux/cuda.h>
  50 #include <linux/pmu.h>
  51 #include <linux/irq.h>
  52 #include <linux/seq_file.h>
  53 #include <linux/root_dev.h>
  54 #include <linux/bitops.h>
  55 #include <linux/suspend.h>
  56
  57 #include <asm/reg.h>
  58 #include <asm/sections.h>
  59 #include <asm/prom.h>
  60 #include <asm/system.h>
  61 #include <asm/pgtable.h>
  62 #include <asm/io.h>
  63 #include <asm/pci-bridge.h>
  64 #include <asm/ohare.h>
  65 #include <asm/mediabay.h>
  66 #include <asm/machdep.h>
  67 #include <asm/dma.h>
  68 #include <asm/cputable.h>
  69 #include <asm/btext.h>
  70 #include <asm/pmac_feature.h>
  71 #include <asm/time.h>
  72 #include <asm/of_device.h>
  73 #include <asm/mmu_context.h>
  74 #include <asm/iommu.h>
  75 #include <asm/smu.h>
  76 #include <asm/pmc.h>
  77 #include <asm/mpic.h>
  78
  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         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
 321                 if (get_property(ic, "interrupt-controller", NULL))
 322                         break;
 323         pmac_newworld = (ic != NULL);
 324         if (ic)
 325                 of_node_put(ic);
 326
 327         /* Lookup PCI hosts */
 328         pmac_pci_init();
 329
 330 #ifdef CONFIG_PPC32
 331         ohare_init();
 332         l2cr_init();
 333 #endif /* CONFIG_PPC32 */
 334
 335 #ifdef CONFIG_PPC64
 336         /* Probe motherboard chipset */
 337         /* this is done earlier in setup_arch for 32-bit */
 338         pmac_feature_init();
 339
 340         /* We can NAP */
 341         powersave_nap = 1;
 342         printk(KERN_INFO "Using native/NAP idle loop\n");
 343 #endif
 344
 345 #ifdef CONFIG_KGDB
 346         zs_kgdb_hook(0);
 347 #endif
 348
 349         find_via_cuda();
 350         find_via_pmu();
 351         smu_init();
 352
 353 #ifdef CONFIG_NVRAM
 354         pmac_nvram_init();
 355 #endif
 356
 357 #ifdef CONFIG_PPC32
 358 #ifdef CONFIG_BLK_DEV_INITRD
 359         if (initrd_start)
 360                 ROOT_DEV = Root_RAM0;
 361         else
 362 #endif
 363                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 364 #endif
 365
 366 #ifdef CONFIG_SMP
 367         /* Check for Core99 */
 368         if (find_devices("uni-n") || find_devices("u3"))
 369                 smp_ops = &core99_smp_ops;
 370 #ifdef CONFIG_PPC32
 371         else
 372                 smp_ops = &psurge_smp_ops;
 373 #endif
 374 #endif /* CONFIG_SMP */
 375 }
 376
 377 char *bootpath;
 378 char *bootdevice;
 379 void *boot_host;
 380 int boot_target;
 381 int boot_part;
 382 extern dev_t boot_dev;
 383
 384 #ifdef CONFIG_SCSI
 385 void __init note_scsi_host(struct device_node *node, void *host)
 386 {
 387         int l;
 388         char *p;
 389
 390         l = strlen(node->full_name);
 391         if (bootpath != NULL && bootdevice != NULL
 392             && strncmp(node->full_name, bootdevice, l) == 0
 393             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 394                 boot_host = host;
 395                 /*
 396                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 397                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 398                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 399                  * That is, the scsi target number doesn't get preserved.
 400                  * So we pick the target number out of bootpath and use that.
 401                  */
 402                 p = strstr(bootpath, "/sd@");
 403                 if (p != NULL) {
 404                         p += 4;
 405                         boot_target = simple_strtoul(p, NULL, 10);
 406                         p = strchr(p, ':');
 407                         if (p != NULL)
 408                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 409                 }
 410         }
 411 }
 412 EXPORT_SYMBOL(note_scsi_host);
 413 #endif
 414
 415 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 416 static dev_t __init find_ide_boot(void)
 417 {
 418         char *p;
 419         int n;
 420         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 421
 422         if (bootdevice == NULL)
 423                 return 0;
 424         p = strrchr(bootdevice, '/');
 425         if (p == NULL)
 426                 return 0;
 427         n = p - bootdevice;
 428
 429         return pmac_find_ide_boot(bootdevice, n);
 430 }
 431 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 432
 433 static void __init find_boot_device(void)
 434 {
 435 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 436         boot_dev = find_ide_boot();
 437 #endif
 438 }
 439
 440 /* TODO: Merge the suspend-to-ram with the common code !!!
 441  * currently, this is a stub implementation for suspend-to-disk
 442  * only
 443  */
 444
 445 #ifdef CONFIG_SOFTWARE_SUSPEND
 446
 447 static int pmac_pm_prepare(suspend_state_t state)
 448 {
 449         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 450
 451         return 0;
 452 }
 453
 454 static int pmac_pm_enter(suspend_state_t state)
 455 {
 456         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 457
 458         /* Giveup the lazy FPU & vec so we don't have to back them
 459          * up from the low level code
 460          */
 461         enable_kernel_fp();
 462
 463 #ifdef CONFIG_ALTIVEC
 464         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 465                 enable_kernel_altivec();
 466 #endif /* CONFIG_ALTIVEC */
 467
 468         return 0;
 469 }
 470
 471 static int pmac_pm_finish(suspend_state_t state)
 472 {
 473         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 474
 475         /* Restore userland MMU context */
 476         set_context(current->active_mm->context, current->active_mm->pgd);
 477
 478         return 0;
 479 }
 480
 481 static struct pm_ops pmac_pm_ops = {
 482         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 483         .prepare        = pmac_pm_prepare,
 484         .enter          = pmac_pm_enter,
 485         .finish         = pmac_pm_finish,
 486 };
 487
 488 #endif /* CONFIG_SOFTWARE_SUSPEND */
 489
 490 static int initializing = 1;
 491
 492 static int pmac_late_init(void)
 493 {
 494         initializing = 0;
 495 #ifdef CONFIG_SOFTWARE_SUSPEND
 496         pm_set_ops(&pmac_pm_ops);
 497 #endif /* CONFIG_SOFTWARE_SUSPEND */
 498         return 0;
 499 }
 500
 501 late_initcall(pmac_late_init);
 502
 503 /* can't be __init - can be called whenever a disk is first accessed */
 504 void note_bootable_part(dev_t dev, int part, int goodness)
 505 {
 506         static int found_boot = 0;
 507         char *p;
 508
 509         if (!initializing)
 510                 return;
 511         if ((goodness <= current_root_goodness) &&
 512             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 513                 return;
 514         p = strstr(saved_command_line, "root=");
 515         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 516                 return;
 517
 518         if (!found_boot) {
 519                 find_boot_device();
 520                 found_boot = 1;
 521         }
 522         if (!boot_dev || dev == boot_dev) {
 523                 ROOT_DEV = dev + part;
 524                 boot_dev = 0;
 525                 current_root_goodness = goodness;
 526         }
 527 }
 528
 529 #ifdef CONFIG_ADB_CUDA
 530 static void cuda_restart(void)
 531 {
 532         struct adb_request req;
 533
 534         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
 535         for (;;)
 536                 cuda_poll();
 537 }
 538
 539 static void cuda_shutdown(void)
 540 {
 541         struct adb_request req;
 542
 543         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
 544         for (;;)
 545                 cuda_poll();
 546 }
 547
 548 #else
 549 #define cuda_restart()
 550 #define cuda_shutdown()
 551 #endif
 552
 553 #ifndef CONFIG_ADB_PMU
 554 #define pmu_restart()
 555 #define pmu_shutdown()
 556 #endif
 557
 558 #ifndef CONFIG_PMAC_SMU
 559 #define smu_restart()
 560 #define smu_shutdown()
 561 #endif
 562
 563 static void pmac_restart(char *cmd)
 564 {
 565         switch (sys_ctrler) {
 566         case SYS_CTRLER_CUDA:
 567                 cuda_restart();
 568                 break;
 569         case SYS_CTRLER_PMU:
 570                 pmu_restart();
 571                 break;
 572         case SYS_CTRLER_SMU:
 573                 smu_restart();
 574                 break;
 575         default: ;
 576         }
 577 }
 578
 579 static void pmac_power_off(void)
 580 {
 581         switch (sys_ctrler) {
 582         case SYS_CTRLER_CUDA:
 583                 cuda_shutdown();
 584                 break;
 585         case SYS_CTRLER_PMU:
 586                 pmu_shutdown();
 587                 break;
 588         case SYS_CTRLER_SMU:
 589                 smu_shutdown();
 590                 break;
 591         default: ;
 592         }
 593 }
 594
 595 static void
 596 pmac_halt(void)
 597 {
 598         pmac_power_off();
 599 }
 600
 601 #ifdef CONFIG_PPC32
 602 void __init pmac_init(void)
 603 {
 604         /* isa_io_base gets set in pmac_pci_init */
 605         isa_mem_base = PMAC_ISA_MEM_BASE;
 606         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 607         ISA_DMA_THRESHOLD = ~0L;
 608         DMA_MODE_READ = 1;
 609         DMA_MODE_WRITE = 2;
 610
 611         ppc_md = pmac_md;
 612
 613 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 614 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 615         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 616         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 617 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 618 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 619
 620         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 621
 622 }
 623 #endif
 624
 625 /*
 626  * Early initialization.
 627  */
 628 static void __init pmac_init_early(void)
 629 {
 630 #ifdef CONFIG_PPC64
 631         /* Initialize hash table, from now on, we can take hash faults
 632          * and call ioremap
 633          */
 634         hpte_init_native();
 635
 636         /* Init SCC */
 637         if (strstr(cmd_line, "sccdbg")) {
 638                 sccdbg = 1;
 639                 udbg_init_scc(NULL);
 640         }
 641
 642         /* Setup interrupt mapping options */
 643         ppc64_interrupt_controller = IC_OPEN_PIC;
 644
 645         iommu_init_early_u3();
 646 #endif
 647 }
 648
 649 static void __init pmac_progress(char *s, unsigned short hex)
 650 {
 651 #ifdef CONFIG_PPC64
 652         if (sccdbg) {
 653                 udbg_puts(s);
 654                 udbg_puts("\n");
 655                 return;
 656         }
 657 #endif
 658 #ifdef CONFIG_BOOTX_TEXT
 659         if (boot_text_mapped) {
 660                 btext_drawstring(s);
 661                 btext_drawchar('\n');
 662         }
 663 #endif /* CONFIG_BOOTX_TEXT */
 664 }
 665
 666 /*
 667  * pmac has no legacy IO, anything calling this function has to
 668  * fail or bad things will happen
 669  */
 670 static int pmac_check_legacy_ioport(unsigned int baseport)
 671 {
 672         return -ENODEV;
 673 }
 674
 675 static int __init pmac_declare_of_platform_devices(void)
 676 {
 677         struct device_node *np, *npp;
 678
 679         np = find_devices("uni-n");
 680         if (np) {
 681                 for (np = np->child; np != NULL; np = np->sibling)
 682                         if (strncmp(np->name, "i2c", 3) == 0) {
 683                                 of_platform_device_create(np, "uni-n-i2c",
 684                                                           NULL);
 685                                 break;
 686                         }
 687         }
 688         np = find_devices("valkyrie");
 689         if (np)
 690                 of_platform_device_create(np, "valkyrie", NULL);
 691         np = find_devices("platinum");
 692         if (np)
 693                 of_platform_device_create(np, "platinum", NULL);
 694
 695         npp = of_find_node_by_name(NULL, "u3");
 696         if (npp) {
 697                 for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) {
 698                         if (strncmp(np->name, "i2c", 3) == 0) {
 699                                 of_platform_device_create(np, "u3-i2c", NULL);
 700                                 of_node_put(np);
 701                                 break;
 702                         }
 703                 }
 704                 of_node_put(npp);
 705         }
 706         np = of_find_node_by_type(NULL, "smu");
 707         if (np) {
 708                 of_platform_device_create(np, "smu", NULL);
 709                 of_node_put(np);
 710         }
 711
 712         return 0;
 713 }
 714
 715 device_initcall(pmac_declare_of_platform_devices);
 716
 717 /*
 718  * Called very early, MMU is off, device-tree isn't unflattened
 719  */
 720 static int __init pmac_probe(int platform)
 721 {
 722 #ifdef CONFIG_PPC64
 723         if (platform != PLATFORM_POWERMAC)
 724                 return 0;
 725
 726         /*
 727          * On U3, the DART (iommu) must be allocated now since it
 728          * has an impact on htab_initialize (due to the large page it
 729          * occupies having to be broken up so the DART itself is not
 730          * part of the cacheable linar mapping
 731          */
 732         alloc_u3_dart_table();
 733 #endif
 734
 735 #ifdef CONFIG_PMAC_SMU
 736         /*
 737          * SMU based G5s need some memory below 2Gb, at least the current
 738          * driver needs that. We have to allocate it now. We allocate 4k
 739          * (1 small page) for now.
 740          */
 741         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 742 #endif /* CONFIG_PMAC_SMU */
 743
 744         return 1;
 745 }
 746
 747 #ifdef CONFIG_PPC64
 748 static int pmac_probe_mode(struct pci_bus *bus)
 749 {
 750         struct device_node *node = bus->sysdata;
 751
 752         /* We need to use normal PCI probing for the AGP bus,
 753            since the device for the AGP bridge isn't in the tree. */
 754         if (bus->self == NULL && device_is_compatible(node, "u3-agp"))
 755                 return PCI_PROBE_NORMAL;
 756
 757         return PCI_PROBE_DEVTREE;
 758 }
 759 #endif
 760
 761 struct machdep_calls __initdata pmac_md = {
 762 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
 763         .cpu_die                = generic_mach_cpu_die,
 764 #endif
 765         .probe                  = pmac_probe,
 766         .setup_arch             = pmac_setup_arch,
 767         .init_early             = pmac_init_early,
 768         .show_cpuinfo           = pmac_show_cpuinfo,
 769         .show_percpuinfo        = pmac_show_percpuinfo,
 770         .init_IRQ               = pmac_pic_init,
 771         .get_irq                = mpic_get_irq, /* changed later */
 772         .pcibios_fixup          = pmac_pcibios_fixup,
 773         .restart                = pmac_restart,
 774         .power_off              = pmac_power_off,
 775         .halt                   = pmac_halt,
 776         .time_init              = pmac_time_init,
 777         .get_boot_time          = pmac_get_boot_time,
 778         .set_rtc_time           = pmac_set_rtc_time,
 779         .get_rtc_time           = pmac_get_rtc_time,
 780         .calibrate_decr         = pmac_calibrate_decr,
 781         .feature_call           = pmac_do_feature_call,
 782         .check_legacy_ioport    = pmac_check_legacy_ioport,
 783         .progress               = pmac_progress,
 784 #ifdef CONFIG_PPC64
 785         .pci_probe_mode         = pmac_probe_mode,
 786         .idle_loop              = native_idle,
 787         .enable_pmcs            = power4_enable_pmcs,
 788 #endif
 789 #ifdef CONFIG_PPC32
 790         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
 791         .pcibios_after_init     = pmac_pcibios_after_init,
 792         .phys_mem_access_prot   = pci_phys_mem_access_prot,
 793 #endif
 794 };