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/init.h>
  27 #include <linux/errno.h>
  28 #include <linux/sched.h>
  29 #include <linux/kernel.h>
  30 #include <linux/mm.h>
  31 #include <linux/stddef.h>
  32 #include <linux/unistd.h>
  33 #include <linux/ptrace.h>
  34 #include <linux/slab.h>
  35 #include <linux/user.h>
  36 #include <linux/a.out.h>
  37 #include <linux/tty.h>
  38 #include <linux/string.h>
  39 #include <linux/delay.h>
  40 #include <linux/ioport.h>
  41 #include <linux/major.h>
  42 #include <linux/initrd.h>
  43 #include <linux/vt_kern.h>
  44 #include <linux/console.h>
  45 #include <linux/ide.h>
  46 #include <linux/pci.h>
  47 #include <linux/adb.h>
  48 #include <linux/cuda.h>
  49 #include <linux/pmu.h>
  50 #include <linux/irq.h>
  51 #include <linux/seq_file.h>
  52 #include <linux/root_dev.h>
  53 #include <linux/bitops.h>
  54 #include <linux/suspend.h>
  55
  56 #include <asm/reg.h>
  57 #include <asm/sections.h>
  58 #include <asm/prom.h>
  59 #include <asm/system.h>
  60 #include <asm/pgtable.h>
  61 #include <asm/io.h>
  62 #include <asm/kexec.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/lmb.h>
  78 #include <asm/udbg.h>
  79
  80 #include "pmac.h"
  81
  82 #undef SHOW_GATWICK_IRQS
  83
  84 int ppc_override_l2cr = 0;
  85 int ppc_override_l2cr_value;
  86 int has_l2cache = 0;
  87
  88 int pmac_newworld;
  89
  90 static int current_root_goodness = -1;
  91
  92 extern struct machdep_calls pmac_md;
  93
  94 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
  95
  96 #ifdef CONFIG_PPC64
  97 #include <asm/udbg.h>
  98 int sccdbg;
  99 #endif
 100
 101 extern void zs_kgdb_hook(int tty_num);
 102
 103 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
 104 EXPORT_SYMBOL(sys_ctrler);
 105
 106 #ifdef CONFIG_PMAC_SMU
 107 unsigned long smu_cmdbuf_abs;
 108 EXPORT_SYMBOL(smu_cmdbuf_abs);
 109 #endif
 110
 111 #ifdef CONFIG_SMP
 112 extern struct smp_ops_t psurge_smp_ops;
 113 extern struct smp_ops_t core99_smp_ops;
 114 #endif /* CONFIG_SMP */
 115
 116 static void pmac_show_cpuinfo(struct seq_file *m)
 117 {
 118         struct device_node *np;
 119         char *pp;
 120         int plen;
 121         int mbmodel;
 122         unsigned int mbflags;
 123         char* mbname;
 124
 125         mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 126                                     PMAC_MB_INFO_MODEL, 0);
 127         mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
 128                                     PMAC_MB_INFO_FLAGS, 0);
 129         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
 130                               (long) &mbname) != 0)
 131                 mbname = "Unknown";
 132
 133         /* find motherboard type */
 134         seq_printf(m, "machine\t\t: ");
 135         np = of_find_node_by_path("/");
 136         if (np != NULL) {
 137                 pp = (char *) get_property(np, "model", NULL);
 138                 if (pp != NULL)
 139                         seq_printf(m, "%s\n", pp);
 140                 else
 141                         seq_printf(m, "PowerMac\n");
 142                 pp = (char *) get_property(np, "compatible", &plen);
 143                 if (pp != NULL) {
 144                         seq_printf(m, "motherboard\t:");
 145                         while (plen > 0) {
 146                                 int l = strlen(pp) + 1;
 147                                 seq_printf(m, " %s", pp);
 148                                 plen -= l;
 149                                 pp += l;
 150                         }
 151                         seq_printf(m, "\n");
 152                 }
 153                 of_node_put(np);
 154         } else
 155                 seq_printf(m, "PowerMac\n");
 156
 157         /* print parsed model */
 158         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
 159         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 160
 161         /* find l2 cache info */
 162         np = of_find_node_by_name(NULL, "l2-cache");
 163         if (np == NULL)
 164                 np = of_find_node_by_type(NULL, "cache");
 165         if (np != NULL) {
 166                 unsigned int *ic = (unsigned int *)
 167                         get_property(np, "i-cache-size", NULL);
 168                 unsigned int *dc = (unsigned int *)
 169                         get_property(np, "d-cache-size", NULL);
 170                 seq_printf(m, "L2 cache\t:");
 171                 has_l2cache = 1;
 172                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
 173                         seq_printf(m, " %dK unified", *dc / 1024);
 174                 } else {
 175                         if (ic)
 176                                 seq_printf(m, " %dK instruction", *ic / 1024);
 177                         if (dc)
 178                                 seq_printf(m, "%s %dK data",
 179                                            (ic? " +": ""), *dc / 1024);
 180                 }
 181                 pp = get_property(np, "ram-type", NULL);
 182                 if (pp)
 183                         seq_printf(m, " %s", pp);
 184                 seq_printf(m, "\n");
 185                 of_node_put(np);
 186         }
 187
 188         /* Indicate newworld/oldworld */
 189         seq_printf(m, "pmac-generation\t: %s\n",
 190                    pmac_newworld ? "NewWorld" : "OldWorld");
 191 }
 192
 193 #ifndef CONFIG_ADB_CUDA
 194 int find_via_cuda(void)
 195 {
 196         if (!find_devices("via-cuda"))
 197                 return 0;
 198         printk("WARNING ! Your machine is CUDA-based but your kernel\n");
 199         printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
 200         return 0;
 201 }
 202 #endif
 203
 204 #ifndef CONFIG_ADB_PMU
 205 int find_via_pmu(void)
 206 {
 207         if (!find_devices("via-pmu"))
 208                 return 0;
 209         printk("WARNING ! Your machine is PMU-based but your kernel\n");
 210         printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
 211         return 0;
 212 }
 213 #endif
 214
 215 #ifndef CONFIG_PMAC_SMU
 216 int smu_init(void)
 217 {
 218         /* should check and warn if SMU is present */
 219         return 0;
 220 }
 221 #endif
 222
 223 #ifdef CONFIG_PPC32
 224 static volatile u32 *sysctrl_regs;
 225
 226 static void __init ohare_init(void)
 227 {
 228         /* this area has the CPU identification register
 229            and some registers used by smp boards */
 230         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 231
 232         /*
 233          * Turn on the L2 cache.
 234          * We assume that we have a PSX memory controller iff
 235          * we have an ohare I/O controller.
 236          */
 237         if (find_devices("ohare") != NULL) {
 238                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
 239                         if (sysctrl_regs[4] & 0x10)
 240                                 sysctrl_regs[4] |= 0x04000020;
 241                         else
 242                                 sysctrl_regs[4] |= 0x04000000;
 243                         if(has_l2cache)
 244                                 printk(KERN_INFO "Level 2 cache enabled\n");
 245                 }
 246         }
 247 }
 248
 249 static void __init l2cr_init(void)
 250 {
 251         /* Checks "l2cr-value" property in the registry */
 252         if (cpu_has_feature(CPU_FTR_L2CR)) {
 253                 struct device_node *np = find_devices("cpus");
 254                 if (np == 0)
 255                         np = find_type_devices("cpu");
 256                 if (np != 0) {
 257                         unsigned int *l2cr = (unsigned int *)
 258                                 get_property(np, "l2cr-value", NULL);
 259                         if (l2cr != 0) {
 260                                 ppc_override_l2cr = 1;
 261                                 ppc_override_l2cr_value = *l2cr;
 262                                 _set_L2CR(0);
 263                                 _set_L2CR(ppc_override_l2cr_value);
 264                         }
 265                 }
 266         }
 267
 268         if (ppc_override_l2cr)
 269                 printk(KERN_INFO "L2CR overridden (0x%x), "
 270                        "backside cache is %s\n",
 271                        ppc_override_l2cr_value,
 272                        (ppc_override_l2cr_value & 0x80000000)
 273                                 ? "enabled" : "disabled");
 274 }
 275 #endif
 276
 277 static void __init pmac_setup_arch(void)
 278 {
 279         struct device_node *cpu, *ic;
 280         int *fp;
 281         unsigned long pvr;
 282
 283         pvr = PVR_VER(mfspr(SPRN_PVR));
 284
 285         /* Set loops_per_jiffy to a half-way reasonable value,
 286            for use until calibrate_delay gets called. */
 287         loops_per_jiffy = 50000000 / HZ;
 288         cpu = of_find_node_by_type(NULL, "cpu");
 289         if (cpu != NULL) {
 290                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 291                 if (fp != NULL) {
 292                         if (pvr >= 0x30 && pvr < 0x80)
 293                                 /* PPC970 etc. */
 294                                 loops_per_jiffy = *fp / (3 * HZ);
 295                         else if (pvr == 4 || pvr >= 8)
 296                                 /* 604, G3, G4 etc. */
 297                                 loops_per_jiffy = *fp / HZ;
 298                         else
 299                                 /* 601, 603, etc. */
 300                                 loops_per_jiffy = *fp / (2 * HZ);
 301                 }
 302                 of_node_put(cpu);
 303         }
 304
 305         /* See if newworld or oldworld */
 306         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
 307                 if (get_property(ic, "interrupt-controller", NULL))
 308                         break;
 309         if (ic) {
 310                 pmac_newworld = 1;
 311                 of_node_put(ic);
 312         }
 313
 314         /* Lookup PCI hosts */
 315         pmac_pci_init();
 316
 317 #ifdef CONFIG_PPC32
 318         ohare_init();
 319         l2cr_init();
 320 #endif /* CONFIG_PPC32 */
 321
 322 #ifdef CONFIG_KGDB
 323         zs_kgdb_hook(0);
 324 #endif
 325
 326         find_via_cuda();
 327         find_via_pmu();
 328         smu_init();
 329
 330 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
 331         pmac_nvram_init();
 332 #endif
 333
 334 #ifdef CONFIG_PPC32
 335 #ifdef CONFIG_BLK_DEV_INITRD
 336         if (initrd_start)
 337                 ROOT_DEV = Root_RAM0;
 338         else
 339 #endif
 340                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 341 #endif
 342
 343 #ifdef CONFIG_SMP
 344         /* Check for Core99 */
 345         if (find_devices("uni-n") || find_devices("u3") || find_devices("u4"))
 346                 smp_ops = &core99_smp_ops;
 347 #ifdef CONFIG_PPC32
 348         else
 349                 smp_ops = &psurge_smp_ops;
 350 #endif
 351 #endif /* CONFIG_SMP */
 352
 353 #ifdef CONFIG_ADB
 354         if (strstr(cmd_line, "adb_sync")) {
 355                 extern int __adb_probe_sync;
 356                 __adb_probe_sync = 1;
 357         }
 358 #endif /* CONFIG_ADB */
 359 }
 360
 361 char *bootpath;
 362 char *bootdevice;
 363 void *boot_host;
 364 int boot_target;
 365 int boot_part;
 366 extern dev_t boot_dev;
 367
 368 #ifdef CONFIG_SCSI
 369 void __init note_scsi_host(struct device_node *node, void *host)
 370 {
 371         int l;
 372         char *p;
 373
 374         l = strlen(node->full_name);
 375         if (bootpath != NULL && bootdevice != NULL
 376             && strncmp(node->full_name, bootdevice, l) == 0
 377             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 378                 boot_host = host;
 379                 /*
 380                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 381                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 382                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 383                  * That is, the scsi target number doesn't get preserved.
 384                  * So we pick the target number out of bootpath and use that.
 385                  */
 386                 p = strstr(bootpath, "/sd@");
 387                 if (p != NULL) {
 388                         p += 4;
 389                         boot_target = simple_strtoul(p, NULL, 10);
 390                         p = strchr(p, ':');
 391                         if (p != NULL)
 392                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 393                 }
 394         }
 395 }
 396 EXPORT_SYMBOL(note_scsi_host);
 397 #endif
 398
 399 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 400 static dev_t __init find_ide_boot(void)
 401 {
 402         char *p;
 403         int n;
 404         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 405
 406         if (bootdevice == NULL)
 407                 return 0;
 408         p = strrchr(bootdevice, '/');
 409         if (p == NULL)
 410                 return 0;
 411         n = p - bootdevice;
 412
 413         return pmac_find_ide_boot(bootdevice, n);
 414 }
 415 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 416
 417 static void __init find_boot_device(void)
 418 {
 419 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 420         boot_dev = find_ide_boot();
 421 #endif
 422 }
 423
 424 /* TODO: Merge the suspend-to-ram with the common code !!!
 425  * currently, this is a stub implementation for suspend-to-disk
 426  * only
 427  */
 428
 429 #ifdef CONFIG_SOFTWARE_SUSPEND
 430
 431 static int pmac_pm_prepare(suspend_state_t state)
 432 {
 433         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 434
 435         return 0;
 436 }
 437
 438 static int pmac_pm_enter(suspend_state_t state)
 439 {
 440         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 441
 442         /* Giveup the lazy FPU & vec so we don't have to back them
 443          * up from the low level code
 444          */
 445         enable_kernel_fp();
 446
 447 #ifdef CONFIG_ALTIVEC
 448         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 449                 enable_kernel_altivec();
 450 #endif /* CONFIG_ALTIVEC */
 451
 452         return 0;
 453 }
 454
 455 static int pmac_pm_finish(suspend_state_t state)
 456 {
 457         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 458
 459         /* Restore userland MMU context */
 460         set_context(current->active_mm->context.id, current->active_mm->pgd);
 461
 462         return 0;
 463 }
 464
 465 static int pmac_pm_valid(suspend_state_t state)
 466 {
 467         switch (state) {
 468         case PM_SUSPEND_DISK:
 469                 return 1;
 470         /* can't do any other states via generic mechanism yet */
 471         default:
 472                 return 0;
 473         }
 474 }
 475
 476 static struct pm_ops pmac_pm_ops = {
 477         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 478         .prepare        = pmac_pm_prepare,
 479         .enter          = pmac_pm_enter,
 480         .finish         = pmac_pm_finish,
 481         .valid          = pmac_pm_valid,
 482 };
 483
 484 #endif /* CONFIG_SOFTWARE_SUSPEND */
 485
 486 static int initializing = 1;
 487
 488 static int pmac_late_init(void)
 489 {
 490         initializing = 0;
 491 #ifdef CONFIG_SOFTWARE_SUSPEND
 492         pm_set_ops(&pmac_pm_ops);
 493 #endif /* CONFIG_SOFTWARE_SUSPEND */
 494         return 0;
 495 }
 496
 497 late_initcall(pmac_late_init);
 498
 499 /* can't be __init - can be called whenever a disk is first accessed */
 500 void note_bootable_part(dev_t dev, int part, int goodness)
 501 {
 502         static int found_boot = 0;
 503         char *p;
 504
 505         if (!initializing)
 506                 return;
 507         if ((goodness <= current_root_goodness) &&
 508             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 509                 return;
 510         p = strstr(saved_command_line, "root=");
 511         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 512                 return;
 513
 514         if (!found_boot) {
 515                 find_boot_device();
 516                 found_boot = 1;
 517         }
 518         if (!boot_dev || dev == boot_dev) {
 519                 ROOT_DEV = dev + part;
 520                 boot_dev = 0;
 521                 current_root_goodness = goodness;
 522         }
 523 }
 524
 525 #ifdef CONFIG_ADB_CUDA
 526 static void cuda_restart(void)
 527 {
 528         struct adb_request req;
 529
 530         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
 531         for (;;)
 532                 cuda_poll();
 533 }
 534
 535 static void cuda_shutdown(void)
 536 {
 537         struct adb_request req;
 538
 539         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
 540         for (;;)
 541                 cuda_poll();
 542 }
 543
 544 #else
 545 #define cuda_restart()
 546 #define cuda_shutdown()
 547 #endif
 548
 549 #ifndef CONFIG_ADB_PMU
 550 #define pmu_restart()
 551 #define pmu_shutdown()
 552 #endif
 553
 554 #ifndef CONFIG_PMAC_SMU
 555 #define smu_restart()
 556 #define smu_shutdown()
 557 #endif
 558
 559 static void pmac_restart(char *cmd)
 560 {
 561         switch (sys_ctrler) {
 562         case SYS_CTRLER_CUDA:
 563                 cuda_restart();
 564                 break;
 565         case SYS_CTRLER_PMU:
 566                 pmu_restart();
 567                 break;
 568         case SYS_CTRLER_SMU:
 569                 smu_restart();
 570                 break;
 571         default: ;
 572         }
 573 }
 574
 575 static void pmac_power_off(void)
 576 {
 577         switch (sys_ctrler) {
 578         case SYS_CTRLER_CUDA:
 579                 cuda_shutdown();
 580                 break;
 581         case SYS_CTRLER_PMU:
 582                 pmu_shutdown();
 583                 break;
 584         case SYS_CTRLER_SMU:
 585                 smu_shutdown();
 586                 break;
 587         default: ;
 588         }
 589 }
 590
 591 static void
 592 pmac_halt(void)
 593 {
 594         pmac_power_off();
 595 }
 596
 597 /*
 598  * Early initialization.
 599  */
 600 static void __init pmac_init_early(void)
 601 {
 602         /* Enable early btext debug if requested */
 603         if (strstr(cmd_line, "btextdbg")) {
 604                 udbg_adb_init_early();
 605                 register_early_udbg_console();
 606         }
 607
 608         /* Probe motherboard chipset */
 609         pmac_feature_init();
 610
 611         /* Initialize debug stuff */
 612         udbg_scc_init(!!strstr(cmd_line, "sccdbg"));
 613         udbg_adb_init(!!strstr(cmd_line, "btextdbg"));
 614
 615 #ifdef CONFIG_PPC64
 616         /* Setup interrupt mapping options */
 617         ppc64_interrupt_controller = IC_OPEN_PIC;
 618
 619         iommu_init_early_dart();
 620 #endif
 621 }
 622
 623 /*
 624  * pmac has no legacy IO, anything calling this function has to
 625  * fail or bad things will happen
 626  */
 627 static int pmac_check_legacy_ioport(unsigned int baseport)
 628 {
 629         return -ENODEV;
 630 }
 631
 632 static int __init pmac_declare_of_platform_devices(void)
 633 {
 634         struct device_node *np;
 635
 636         if (machine_is(chrp))
 637                 return -1;
 638
 639         if (!machine_is(powermac))
 640                 return 0;
 641
 642         np = of_find_node_by_name(NULL, "valkyrie");
 643         if (np)
 644                 of_platform_device_create(np, "valkyrie", NULL);
 645         np = of_find_node_by_name(NULL, "platinum");
 646         if (np)
 647                 of_platform_device_create(np, "platinum", NULL);
 648         np = of_find_node_by_type(NULL, "smu");
 649         if (np) {
 650                 of_platform_device_create(np, "smu", NULL);
 651                 of_node_put(np);
 652         }
 653
 654         return 0;
 655 }
 656
 657 device_initcall(pmac_declare_of_platform_devices);
 658
 659 /*
 660  * Called very early, MMU is off, device-tree isn't unflattened
 661  */
 662 static int __init pmac_probe(void)
 663 {
 664         unsigned long root = of_get_flat_dt_root();
 665
 666         if (!of_flat_dt_is_compatible(root, "Power Macintosh") &&
 667             !of_flat_dt_is_compatible(root, "MacRISC"))
 668                 return 0;
 669
 670 #ifdef CONFIG_PPC64
 671         /*
 672          * On U3, the DART (iommu) must be allocated now since it
 673          * has an impact on htab_initialize (due to the large page it
 674          * occupies having to be broken up so the DART itself is not
 675          * part of the cacheable linar mapping
 676          */
 677         alloc_dart_table();
 678
 679         hpte_init_native();
 680 #endif
 681
 682 #ifdef CONFIG_PPC32
 683         /* isa_io_base gets set in pmac_pci_init */
 684         isa_mem_base = PMAC_ISA_MEM_BASE;
 685         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 686         ISA_DMA_THRESHOLD = ~0L;
 687         DMA_MODE_READ = 1;
 688         DMA_MODE_WRITE = 2;
 689
 690 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 691 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 692         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 693         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 694 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 695 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 696
 697 #endif /* CONFIG_PPC32 */
 698
 699 #ifdef CONFIG_PMAC_SMU
 700         /*
 701          * SMU based G5s need some memory below 2Gb, at least the current
 702          * driver needs that. We have to allocate it now. We allocate 4k
 703          * (1 small page) for now.
 704          */
 705         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 706 #endif /* CONFIG_PMAC_SMU */
 707
 708         return 1;
 709 }
 710
 711 #ifdef CONFIG_PPC64
 712 /* Move that to pci.c */
 713 static int pmac_pci_probe_mode(struct pci_bus *bus)
 714 {
 715         struct device_node *node = bus->sysdata;
 716
 717         /* We need to use normal PCI probing for the AGP bus,
 718          * since the device for the AGP bridge isn't in the tree.
 719          */
 720         if (bus->self == NULL && (device_is_compatible(node, "u3-agp") ||
 721                                   device_is_compatible(node, "u4-pcie")))
 722                 return PCI_PROBE_NORMAL;
 723         return PCI_PROBE_DEVTREE;
 724 }
 725 #endif
 726
 727 define_machine(powermac) {
 728         .name                   = "PowerMac",
 729         .probe                  = pmac_probe,
 730         .setup_arch             = pmac_setup_arch,
 731         .init_early             = pmac_init_early,
 732         .show_cpuinfo           = pmac_show_cpuinfo,
 733         .init_IRQ               = pmac_pic_init,
 734         .get_irq                = NULL, /* changed later */
 735         .pcibios_fixup          = pmac_pcibios_fixup,
 736         .restart                = pmac_restart,
 737         .power_off              = pmac_power_off,
 738         .halt                   = pmac_halt,
 739         .time_init              = pmac_time_init,
 740         .get_boot_time          = pmac_get_boot_time,
 741         .set_rtc_time           = pmac_set_rtc_time,
 742         .get_rtc_time           = pmac_get_rtc_time,
 743         .calibrate_decr         = pmac_calibrate_decr,
 744         .feature_call           = pmac_do_feature_call,
 745         .check_legacy_ioport    = pmac_check_legacy_ioport,
 746         .progress               = udbg_progress,
 747 #ifdef CONFIG_PPC64
 748         .pci_probe_mode         = pmac_pci_probe_mode,
 749         .power_save             = power4_idle,
 750         .enable_pmcs            = power4_enable_pmcs,
 751 #ifdef CONFIG_KEXEC
 752         .machine_kexec          = default_machine_kexec,
 753         .machine_kexec_prepare  = default_machine_kexec_prepare,
 754         .machine_crash_shutdown = default_machine_crash_shutdown,
 755 #endif
 756 #endif /* CONFIG_PPC64 */
 757 #ifdef CONFIG_PPC32
 758         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
 759         .pcibios_after_init     = pmac_pcibios_after_init,
 760         .phys_mem_access_prot   = pci_phys_mem_access_prot,
 761 #endif
 762 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
 763         .cpu_die                = generic_mach_cpu_die,
 764 #endif
 765 };