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/pci.h>
  46 #include <linux/adb.h>
  47 #include <linux/cuda.h>
  48 #include <linux/pmu.h>
  49 #include <linux/irq.h>
  50 #include <linux/seq_file.h>
  51 #include <linux/root_dev.h>
  52 #include <linux/bitops.h>
  53 #include <linux/suspend.h>
  54
  55 #include <asm/reg.h>
  56 #include <asm/sections.h>
  57 #include <asm/prom.h>
  58 #include <asm/system.h>
  59 #include <asm/pgtable.h>
  60 #include <asm/io.h>
  61 #include <asm/kexec.h>
  62 #include <asm/pci-bridge.h>
  63 #include <asm/ohare.h>
  64 #include <asm/mediabay.h>
  65 #include <asm/machdep.h>
  66 #include <asm/dma.h>
  67 #include <asm/cputable.h>
  68 #include <asm/btext.h>
  69 #include <asm/pmac_feature.h>
  70 #include <asm/time.h>
  71 #include <asm/of_device.h>
  72 #include <asm/of_platform.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         const 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 = of_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 = of_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                 const unsigned int *ic =
 167                         of_get_property(np, "i-cache-size", NULL);
 168                 const unsigned int *dc =
 169                         of_get_property(np, "d-cache-size", NULL);
 170                 seq_printf(m, "L2 cache\t:");
 171                 has_l2cache = 1;
 172                 if (of_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 = of_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 = of_find_node_by_name(NULL, "cpus");
 254                 if (np == 0)
 255                         np = of_find_node_by_type(NULL, "cpu");
 256                 if (np != 0) {
 257                         const unsigned int *l2cr =
 258                                 of_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                         of_node_put(np);
 266                 }
 267         }
 268
 269         if (ppc_override_l2cr)
 270                 printk(KERN_INFO "L2CR overridden (0x%x), "
 271                        "backside cache is %s\n",
 272                        ppc_override_l2cr_value,
 273                        (ppc_override_l2cr_value & 0x80000000)
 274                                 ? "enabled" : "disabled");
 275 }
 276 #endif
 277
 278 static void __init pmac_setup_arch(void)
 279 {
 280         struct device_node *cpu, *ic;
 281         const int *fp;
 282         unsigned long pvr;
 283
 284         pvr = PVR_VER(mfspr(SPRN_PVR));
 285
 286         /* Set loops_per_jiffy to a half-way reasonable value,
 287            for use until calibrate_delay gets called. */
 288         loops_per_jiffy = 50000000 / HZ;
 289         cpu = of_find_node_by_type(NULL, "cpu");
 290         if (cpu != NULL) {
 291                 fp = of_get_property(cpu, "clock-frequency", NULL);
 292                 if (fp != NULL) {
 293                         if (pvr >= 0x30 && pvr < 0x80)
 294                                 /* PPC970 etc. */
 295                                 loops_per_jiffy = *fp / (3 * HZ);
 296                         else if (pvr == 4 || pvr >= 8)
 297                                 /* 604, G3, G4 etc. */
 298                                 loops_per_jiffy = *fp / HZ;
 299                         else
 300                                 /* 601, 603, etc. */
 301                                 loops_per_jiffy = *fp / (2 * HZ);
 302                 }
 303                 of_node_put(cpu);
 304         }
 305
 306         /* See if newworld or oldworld */
 307         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
 308                 if (of_get_property(ic, "interrupt-controller", NULL))
 309                         break;
 310         if (ic) {
 311                 pmac_newworld = 1;
 312                 of_node_put(ic);
 313         }
 314
 315         /* Lookup PCI hosts */
 316         pmac_pci_init();
 317
 318 #ifdef CONFIG_PPC32
 319         ohare_init();
 320         l2cr_init();
 321 #endif /* CONFIG_PPC32 */
 322
 323 #ifdef CONFIG_KGDB
 324         zs_kgdb_hook(0);
 325 #endif
 326
 327         find_via_cuda();
 328         find_via_pmu();
 329         smu_init();
 330
 331 #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
 332         pmac_nvram_init();
 333 #endif
 334
 335 #ifdef CONFIG_PPC32
 336 #ifdef CONFIG_BLK_DEV_INITRD
 337         if (initrd_start)
 338                 ROOT_DEV = Root_RAM0;
 339         else
 340 #endif
 341                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 342 #endif
 343
 344 #ifdef CONFIG_SMP
 345         /* Check for Core99 */
 346         if (find_devices("uni-n") || find_devices("u3") || find_devices("u4"))
 347                 smp_ops = &core99_smp_ops;
 348 #ifdef CONFIG_PPC32
 349         else
 350                 smp_ops = &psurge_smp_ops;
 351 #endif
 352 #endif /* CONFIG_SMP */
 353
 354 #ifdef CONFIG_ADB
 355         if (strstr(cmd_line, "adb_sync")) {
 356                 extern int __adb_probe_sync;
 357                 __adb_probe_sync = 1;
 358         }
 359 #endif /* CONFIG_ADB */
 360 }
 361
 362 char *bootpath;
 363 char *bootdevice;
 364 void *boot_host;
 365 int boot_target;
 366 int boot_part;
 367 static dev_t boot_dev;
 368
 369 #ifdef CONFIG_SCSI
 370 void __init note_scsi_host(struct device_node *node, void *host)
 371 {
 372         int l;
 373         char *p;
 374
 375         l = strlen(node->full_name);
 376         if (bootpath != NULL && bootdevice != NULL
 377             && strncmp(node->full_name, bootdevice, l) == 0
 378             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 379                 boot_host = host;
 380                 /*
 381                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 382                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 383                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 384                  * That is, the scsi target number doesn't get preserved.
 385                  * So we pick the target number out of bootpath and use that.
 386                  */
 387                 p = strstr(bootpath, "/sd@");
 388                 if (p != NULL) {
 389                         p += 4;
 390                         boot_target = simple_strtoul(p, NULL, 10);
 391                         p = strchr(p, ':');
 392                         if (p != NULL)
 393                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 394                 }
 395         }
 396 }
 397 EXPORT_SYMBOL(note_scsi_host);
 398 #endif
 399
 400 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 401 static dev_t __init find_ide_boot(void)
 402 {
 403         char *p;
 404         int n;
 405         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 406
 407         if (bootdevice == NULL)
 408                 return 0;
 409         p = strrchr(bootdevice, '/');
 410         if (p == NULL)
 411                 return 0;
 412         n = p - bootdevice;
 413
 414         return pmac_find_ide_boot(bootdevice, n);
 415 }
 416 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 417
 418 static void __init find_boot_device(void)
 419 {
 420 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 421         boot_dev = find_ide_boot();
 422 #endif
 423 }
 424
 425 /* TODO: Merge the suspend-to-ram with the common code !!!
 426  * currently, this is a stub implementation for suspend-to-disk
 427  * only
 428  */
 429
 430 #ifdef CONFIG_SOFTWARE_SUSPEND
 431
 432 static int pmac_pm_prepare(suspend_state_t state)
 433 {
 434         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 435
 436         return 0;
 437 }
 438
 439 static int pmac_pm_enter(suspend_state_t state)
 440 {
 441         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 442
 443         /* Giveup the lazy FPU & vec so we don't have to back them
 444          * up from the low level code
 445          */
 446         enable_kernel_fp();
 447
 448 #ifdef CONFIG_ALTIVEC
 449         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 450                 enable_kernel_altivec();
 451 #endif /* CONFIG_ALTIVEC */
 452
 453         return 0;
 454 }
 455
 456 static int pmac_pm_finish(suspend_state_t state)
 457 {
 458         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 459
 460         /* Restore userland MMU context */
 461         set_context(current->active_mm->context.id, current->active_mm->pgd);
 462
 463         return 0;
 464 }
 465
 466 static int pmac_pm_valid(suspend_state_t state)
 467 {
 468         switch (state) {
 469         case PM_SUSPEND_DISK:
 470                 return 1;
 471         /* can't do any other states via generic mechanism yet */
 472         default:
 473                 return 0;
 474         }
 475 }
 476
 477 static struct pm_ops pmac_pm_ops = {
 478         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 479         .prepare        = pmac_pm_prepare,
 480         .enter          = pmac_pm_enter,
 481         .finish         = pmac_pm_finish,
 482         .valid          = pmac_pm_valid,
 483 };
 484
 485 #endif /* CONFIG_SOFTWARE_SUSPEND */
 486
 487 static int initializing = 1;
 488
 489 static int pmac_late_init(void)
 490 {
 491         initializing = 0;
 492 #ifdef CONFIG_SOFTWARE_SUSPEND
 493         pm_set_ops(&pmac_pm_ops);
 494 #endif /* CONFIG_SOFTWARE_SUSPEND */
 495         return 0;
 496 }
 497
 498 late_initcall(pmac_late_init);
 499
 500 /* can't be __init - can be called whenever a disk is first accessed */
 501 void note_bootable_part(dev_t dev, int part, int goodness)
 502 {
 503         static int found_boot = 0;
 504         char *p;
 505
 506         if (!initializing)
 507                 return;
 508         if ((goodness <= current_root_goodness) &&
 509             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 510                 return;
 511         p = strstr(boot_command_line, "root=");
 512         if (p != NULL && (p == boot_command_line || p[-1] == ' '))
 513                 return;
 514
 515         if (!found_boot) {
 516                 find_boot_device();
 517                 found_boot = 1;
 518         }
 519         if (!boot_dev || dev == boot_dev) {
 520                 ROOT_DEV = dev + part;
 521                 boot_dev = 0;
 522                 current_root_goodness = goodness;
 523         }
 524 }
 525
 526 #ifdef CONFIG_ADB_CUDA
 527 static void cuda_restart(void)
 528 {
 529         struct adb_request req;
 530
 531         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
 532         for (;;)
 533                 cuda_poll();
 534 }
 535
 536 static void cuda_shutdown(void)
 537 {
 538         struct adb_request req;
 539
 540         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
 541         for (;;)
 542                 cuda_poll();
 543 }
 544
 545 #else
 546 #define cuda_restart()
 547 #define cuda_shutdown()
 548 #endif
 549
 550 #ifndef CONFIG_ADB_PMU
 551 #define pmu_restart()
 552 #define pmu_shutdown()
 553 #endif
 554
 555 #ifndef CONFIG_PMAC_SMU
 556 #define smu_restart()
 557 #define smu_shutdown()
 558 #endif
 559
 560 static void pmac_restart(char *cmd)
 561 {
 562         switch (sys_ctrler) {
 563         case SYS_CTRLER_CUDA:
 564                 cuda_restart();
 565                 break;
 566         case SYS_CTRLER_PMU:
 567                 pmu_restart();
 568                 break;
 569         case SYS_CTRLER_SMU:
 570                 smu_restart();
 571                 break;
 572         default: ;
 573         }
 574 }
 575
 576 static void pmac_power_off(void)
 577 {
 578         switch (sys_ctrler) {
 579         case SYS_CTRLER_CUDA:
 580                 cuda_shutdown();
 581                 break;
 582         case SYS_CTRLER_PMU:
 583                 pmu_shutdown();
 584                 break;
 585         case SYS_CTRLER_SMU:
 586                 smu_shutdown();
 587                 break;
 588         default: ;
 589         }
 590 }
 591
 592 static void
 593 pmac_halt(void)
 594 {
 595         pmac_power_off();
 596 }
 597
 598 /*
 599  * Early initialization.
 600  */
 601 static void __init pmac_init_early(void)
 602 {
 603         /* Enable early btext debug if requested */
 604         if (strstr(cmd_line, "btextdbg")) {
 605                 udbg_adb_init_early();
 606                 register_early_udbg_console();
 607         }
 608
 609         /* Probe motherboard chipset */
 610         pmac_feature_init();
 611
 612         /* Initialize debug stuff */
 613         udbg_scc_init(!!strstr(cmd_line, "sccdbg"));
 614         udbg_adb_init(!!strstr(cmd_line, "btextdbg"));
 615
 616 #ifdef CONFIG_PPC64
 617         iommu_init_early_dart();
 618 #endif
 619 }
 620
 621 /*
 622  * pmac has no legacy IO, anything calling this function has to
 623  * fail or bad things will happen
 624  */
 625 static int pmac_check_legacy_ioport(unsigned int baseport)
 626 {
 627         return -ENODEV;
 628 }
 629
 630 static int __init pmac_declare_of_platform_devices(void)
 631 {
 632         struct device_node *np;
 633
 634         if (machine_is(chrp))
 635                 return -1;
 636
 637         if (!machine_is(powermac))
 638                 return 0;
 639
 640         np = of_find_node_by_name(NULL, "valkyrie");
 641         if (np)
 642                 of_platform_device_create(np, "valkyrie", NULL);
 643         np = of_find_node_by_name(NULL, "platinum");
 644         if (np)
 645                 of_platform_device_create(np, "platinum", NULL);
 646         np = of_find_node_by_type(NULL, "smu");
 647         if (np) {
 648                 of_platform_device_create(np, "smu", NULL);
 649                 of_node_put(np);
 650         }
 651
 652         return 0;
 653 }
 654
 655 device_initcall(pmac_declare_of_platform_devices);
 656
 657 /*
 658  * Called very early, MMU is off, device-tree isn't unflattened
 659  */
 660 static int __init pmac_probe(void)
 661 {
 662         unsigned long root = of_get_flat_dt_root();
 663
 664         if (!of_flat_dt_is_compatible(root, "Power Macintosh") &&
 665             !of_flat_dt_is_compatible(root, "MacRISC"))
 666                 return 0;
 667
 668 #ifdef CONFIG_PPC64
 669         /*
 670          * On U3, the DART (iommu) must be allocated now since it
 671          * has an impact on htab_initialize (due to the large page it
 672          * occupies having to be broken up so the DART itself is not
 673          * part of the cacheable linar mapping
 674          */
 675         alloc_dart_table();
 676
 677         hpte_init_native();
 678 #endif
 679
 680 #ifdef CONFIG_PPC32
 681         /* isa_io_base gets set in pmac_pci_init */
 682         ISA_DMA_THRESHOLD = ~0L;
 683         DMA_MODE_READ = 1;
 684         DMA_MODE_WRITE = 2;
 685
 686 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 687 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 688         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 689         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 690 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 691 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 692
 693 #endif /* CONFIG_PPC32 */
 694
 695 #ifdef CONFIG_PMAC_SMU
 696         /*
 697          * SMU based G5s need some memory below 2Gb, at least the current
 698          * driver needs that. We have to allocate it now. We allocate 4k
 699          * (1 small page) for now.
 700          */
 701         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 702 #endif /* CONFIG_PMAC_SMU */
 703
 704         return 1;
 705 }
 706
 707 #ifdef CONFIG_PPC64
 708 /* Move that to pci.c */
 709 static int pmac_pci_probe_mode(struct pci_bus *bus)
 710 {
 711         struct device_node *node = bus->sysdata;
 712
 713         /* We need to use normal PCI probing for the AGP bus,
 714          * since the device for the AGP bridge isn't in the tree.
 715          */
 716         if (bus->self == NULL && (device_is_compatible(node, "u3-agp") ||
 717                                   device_is_compatible(node, "u4-pcie")))
 718                 return PCI_PROBE_NORMAL;
 719         return PCI_PROBE_DEVTREE;
 720 }
 721 #endif
 722
 723 define_machine(powermac) {
 724         .name                   = "PowerMac",
 725         .probe                  = pmac_probe,
 726         .setup_arch             = pmac_setup_arch,
 727         .init_early             = pmac_init_early,
 728         .show_cpuinfo           = pmac_show_cpuinfo,
 729         .init_IRQ               = pmac_pic_init,
 730         .get_irq                = NULL, /* changed later */
 731         .pci_irq_fixup          = pmac_pci_irq_fixup,
 732         .restart                = pmac_restart,
 733         .power_off              = pmac_power_off,
 734         .halt                   = pmac_halt,
 735         .time_init              = pmac_time_init,
 736         .get_boot_time          = pmac_get_boot_time,
 737         .set_rtc_time           = pmac_set_rtc_time,
 738         .get_rtc_time           = pmac_get_rtc_time,
 739         .calibrate_decr         = pmac_calibrate_decr,
 740         .feature_call           = pmac_do_feature_call,
 741         .check_legacy_ioport    = pmac_check_legacy_ioport,
 742         .progress               = udbg_progress,
 743 #ifdef CONFIG_PPC64
 744         .pci_probe_mode         = pmac_pci_probe_mode,
 745         .power_save             = power4_idle,
 746         .enable_pmcs            = power4_enable_pmcs,
 747 #ifdef CONFIG_KEXEC
 748         .machine_kexec          = default_machine_kexec,
 749         .machine_kexec_prepare  = default_machine_kexec_prepare,
 750         .machine_crash_shutdown = default_machine_crash_shutdown,
 751 #endif
 752 #endif /* CONFIG_PPC64 */
 753 #ifdef CONFIG_PPC32
 754         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
 755         .pcibios_after_init     = pmac_pcibios_after_init,
 756         .phys_mem_access_prot   = pci_phys_mem_access_prot,
 757 #endif
 758 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
 759         .cpu_die                = generic_mach_cpu_die,
 760 #endif
 761 };