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