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/kexec.h>
  64 #include <asm/pci-bridge.h>
  65 #include <asm/ohare.h>
  66 #include <asm/mediabay.h>
  67 #include <asm/machdep.h>
  68 #include <asm/dma.h>
  69 #include <asm/cputable.h>
  70 #include <asm/btext.h>
  71 #include <asm/pmac_feature.h>
  72 #include <asm/time.h>
  73 #include <asm/of_device.h>
  74 #include <asm/mmu_context.h>
  75 #include <asm/iommu.h>
  76 #include <asm/smu.h>
  77 #include <asm/pmc.h>
  78 #include <asm/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 = 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 #ifndef CONFIG_ADB_CUDA
 196 int find_via_cuda(void)
 197 {
 198         if (!find_devices("via-cuda"))
 199                 return 0;
 200         printk("WARNING ! Your machine is CUDA-based but your kernel\n");
 201         printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
 202         return 0;
 203 }
 204 #endif
 205
 206 #ifndef CONFIG_ADB_PMU
 207 int find_via_pmu(void)
 208 {
 209         if (!find_devices("via-pmu"))
 210                 return 0;
 211         printk("WARNING ! Your machine is PMU-based but your kernel\n");
 212         printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
 213         return 0;
 214 }
 215 #endif
 216
 217 #ifndef CONFIG_PMAC_SMU
 218 int smu_init(void)
 219 {
 220         /* should check and warn if SMU is present */
 221         return 0;
 222 }
 223 #endif
 224
 225 #ifdef CONFIG_PPC32
 226 static volatile u32 *sysctrl_regs;
 227
 228 static void __init ohare_init(void)
 229 {
 230         /* this area has the CPU identification register
 231            and some registers used by smp boards */
 232         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 233
 234         /*
 235          * Turn on the L2 cache.
 236          * We assume that we have a PSX memory controller iff
 237          * we have an ohare I/O controller.
 238          */
 239         if (find_devices("ohare") != NULL) {
 240                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
 241                         if (sysctrl_regs[4] & 0x10)
 242                                 sysctrl_regs[4] |= 0x04000020;
 243                         else
 244                                 sysctrl_regs[4] |= 0x04000000;
 245                         if(has_l2cache)
 246                                 printk(KERN_INFO "Level 2 cache enabled\n");
 247                 }
 248         }
 249 }
 250
 251 static void __init l2cr_init(void)
 252 {
 253         /* Checks "l2cr-value" property in the registry */
 254         if (cpu_has_feature(CPU_FTR_L2CR)) {
 255                 struct device_node *np = find_devices("cpus");
 256                 if (np == 0)
 257                         np = find_type_devices("cpu");
 258                 if (np != 0) {
 259                         unsigned int *l2cr = (unsigned int *)
 260                                 get_property(np, "l2cr-value", NULL);
 261                         if (l2cr != 0) {
 262                                 ppc_override_l2cr = 1;
 263                                 ppc_override_l2cr_value = *l2cr;
 264                                 _set_L2CR(0);
 265                                 _set_L2CR(ppc_override_l2cr_value);
 266                         }
 267                 }
 268         }
 269
 270         if (ppc_override_l2cr)
 271                 printk(KERN_INFO "L2CR overridden (0x%x), "
 272                        "backside cache is %s\n",
 273                        ppc_override_l2cr_value,
 274                        (ppc_override_l2cr_value & 0x80000000)
 275                                 ? "enabled" : "disabled");
 276 }
 277 #endif
 278
 279 static void __init pmac_setup_arch(void)
 280 {
 281         struct device_node *cpu, *ic;
 282         int *fp;
 283         unsigned long pvr;
 284
 285         pvr = PVR_VER(mfspr(SPRN_PVR));
 286
 287         /* Set loops_per_jiffy to a half-way reasonable value,
 288            for use until calibrate_delay gets called. */
 289         loops_per_jiffy = 50000000 / HZ;
 290         cpu = of_find_node_by_type(NULL, "cpu");
 291         if (cpu != NULL) {
 292                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 293                 if (fp != NULL) {
 294                         if (pvr >= 0x30 && pvr < 0x80)
 295                                 /* PPC970 etc. */
 296                                 loops_per_jiffy = *fp / (3 * HZ);
 297                         else if (pvr == 4 || pvr >= 8)
 298                                 /* 604, G3, G4 etc. */
 299                                 loops_per_jiffy = *fp / HZ;
 300                         else
 301                                 /* 601, 603, etc. */
 302                                 loops_per_jiffy = *fp / (2 * HZ);
 303                 }
 304                 of_node_put(cpu);
 305         }
 306
 307         /* See if newworld or oldworld */
 308         for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
 309                 if (get_property(ic, "interrupt-controller", NULL))
 310                         break;
 311         pmac_newworld = (ic != NULL);
 312         if (ic)
 313                 of_node_put(ic);
 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
 355 char *bootpath;
 356 char *bootdevice;
 357 void *boot_host;
 358 int boot_target;
 359 int boot_part;
 360 extern dev_t boot_dev;
 361
 362 #ifdef CONFIG_SCSI
 363 void __init note_scsi_host(struct device_node *node, void *host)
 364 {
 365         int l;
 366         char *p;
 367
 368         l = strlen(node->full_name);
 369         if (bootpath != NULL && bootdevice != NULL
 370             && strncmp(node->full_name, bootdevice, l) == 0
 371             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 372                 boot_host = host;
 373                 /*
 374                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 375                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 376                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 377                  * That is, the scsi target number doesn't get preserved.
 378                  * So we pick the target number out of bootpath and use that.
 379                  */
 380                 p = strstr(bootpath, "/sd@");
 381                 if (p != NULL) {
 382                         p += 4;
 383                         boot_target = simple_strtoul(p, NULL, 10);
 384                         p = strchr(p, ':');
 385                         if (p != NULL)
 386                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 387                 }
 388         }
 389 }
 390 EXPORT_SYMBOL(note_scsi_host);
 391 #endif
 392
 393 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 394 static dev_t __init find_ide_boot(void)
 395 {
 396         char *p;
 397         int n;
 398         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 399
 400         if (bootdevice == NULL)
 401                 return 0;
 402         p = strrchr(bootdevice, '/');
 403         if (p == NULL)
 404                 return 0;
 405         n = p - bootdevice;
 406
 407         return pmac_find_ide_boot(bootdevice, n);
 408 }
 409 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 410
 411 static void __init find_boot_device(void)
 412 {
 413 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 414         boot_dev = find_ide_boot();
 415 #endif
 416 }
 417
 418 /* TODO: Merge the suspend-to-ram with the common code !!!
 419  * currently, this is a stub implementation for suspend-to-disk
 420  * only
 421  */
 422
 423 #ifdef CONFIG_SOFTWARE_SUSPEND
 424
 425 static int pmac_pm_prepare(suspend_state_t state)
 426 {
 427         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 428
 429         return 0;
 430 }
 431
 432 static int pmac_pm_enter(suspend_state_t state)
 433 {
 434         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 435
 436         /* Giveup the lazy FPU & vec so we don't have to back them
 437          * up from the low level code
 438          */
 439         enable_kernel_fp();
 440
 441 #ifdef CONFIG_ALTIVEC
 442         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
 443                 enable_kernel_altivec();
 444 #endif /* CONFIG_ALTIVEC */
 445
 446         return 0;
 447 }
 448
 449 static int pmac_pm_finish(suspend_state_t state)
 450 {
 451         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 452
 453         /* Restore userland MMU context */
 454         set_context(current->active_mm->context, current->active_mm->pgd);
 455
 456         return 0;
 457 }
 458
 459 static int pmac_pm_valid(suspend_state_t state)
 460 {
 461         switch (state) {
 462         case PM_SUSPEND_DISK:
 463                 return 1;
 464         /* can't do any other states via generic mechanism yet */
 465         default:
 466                 return 0;
 467         }
 468 }
 469
 470 static struct pm_ops pmac_pm_ops = {
 471         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 472         .prepare        = pmac_pm_prepare,
 473         .enter          = pmac_pm_enter,
 474         .finish         = pmac_pm_finish,
 475         .valid          = pmac_pm_valid,
 476 };
 477
 478 #endif /* CONFIG_SOFTWARE_SUSPEND */
 479
 480 static int initializing = 1;
 481
 482 static int pmac_late_init(void)
 483 {
 484         initializing = 0;
 485 #ifdef CONFIG_SOFTWARE_SUSPEND
 486         pm_set_ops(&pmac_pm_ops);
 487 #endif /* CONFIG_SOFTWARE_SUSPEND */
 488         return 0;
 489 }
 490
 491 late_initcall(pmac_late_init);
 492
 493 /* can't be __init - can be called whenever a disk is first accessed */
 494 void note_bootable_part(dev_t dev, int part, int goodness)
 495 {
 496         static int found_boot = 0;
 497         char *p;
 498
 499         if (!initializing)
 500                 return;
 501         if ((goodness <= current_root_goodness) &&
 502             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 503                 return;
 504         p = strstr(saved_command_line, "root=");
 505         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 506                 return;
 507
 508         if (!found_boot) {
 509                 find_boot_device();
 510                 found_boot = 1;
 511         }
 512         if (!boot_dev || dev == boot_dev) {
 513                 ROOT_DEV = dev + part;
 514                 boot_dev = 0;
 515                 current_root_goodness = goodness;
 516         }
 517 }
 518
 519 #ifdef CONFIG_ADB_CUDA
 520 static void cuda_restart(void)
 521 {
 522         struct adb_request req;
 523
 524         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
 525         for (;;)
 526                 cuda_poll();
 527 }
 528
 529 static void cuda_shutdown(void)
 530 {
 531         struct adb_request req;
 532
 533         cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
 534         for (;;)
 535                 cuda_poll();
 536 }
 537
 538 #else
 539 #define cuda_restart()
 540 #define cuda_shutdown()
 541 #endif
 542
 543 #ifndef CONFIG_ADB_PMU
 544 #define pmu_restart()
 545 #define pmu_shutdown()
 546 #endif
 547
 548 #ifndef CONFIG_PMAC_SMU
 549 #define smu_restart()
 550 #define smu_shutdown()
 551 #endif
 552
 553 static void pmac_restart(char *cmd)
 554 {
 555         switch (sys_ctrler) {
 556         case SYS_CTRLER_CUDA:
 557                 cuda_restart();
 558                 break;
 559         case SYS_CTRLER_PMU:
 560                 pmu_restart();
 561                 break;
 562         case SYS_CTRLER_SMU:
 563                 smu_restart();
 564                 break;
 565         default: ;
 566         }
 567 }
 568
 569 static void pmac_power_off(void)
 570 {
 571         switch (sys_ctrler) {
 572         case SYS_CTRLER_CUDA:
 573                 cuda_shutdown();
 574                 break;
 575         case SYS_CTRLER_PMU:
 576                 pmu_shutdown();
 577                 break;
 578         case SYS_CTRLER_SMU:
 579                 smu_shutdown();
 580                 break;
 581         default: ;
 582         }
 583 }
 584
 585 static void
 586 pmac_halt(void)
 587 {
 588         pmac_power_off();
 589 }
 590
 591 #ifdef CONFIG_PPC32
 592 void __init pmac_init(void)
 593 {
 594         /* isa_io_base gets set in pmac_pci_init */
 595         isa_mem_base = PMAC_ISA_MEM_BASE;
 596         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 597         ISA_DMA_THRESHOLD = ~0L;
 598         DMA_MODE_READ = 1;
 599         DMA_MODE_WRITE = 2;
 600
 601         ppc_md = pmac_md;
 602
 603 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 604 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 605         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 606         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 607 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 608 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 609
 610         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 611
 612 }
 613 #endif
 614
 615 /*
 616  * Early initialization.
 617  */
 618 static void __init pmac_init_early(void)
 619 {
 620 #ifdef CONFIG_PPC64
 621         /* Initialize hash table, from now on, we can take hash faults
 622          * and call ioremap
 623          */
 624         hpte_init_native();
 625 #endif
 626
 627         /* Enable early btext debug if requested */
 628         if (strstr(cmd_line, "btextdbg")) {
 629                 udbg_adb_init_early();
 630                 register_early_udbg_console();
 631         }
 632
 633         /* Probe motherboard chipset */
 634         pmac_feature_init();
 635
 636         /* Initialize debug stuff */
 637         udbg_scc_init(!!strstr(cmd_line, "sccdbg"));
 638         udbg_adb_init(!!strstr(cmd_line, "btextdbg"));
 639
 640 #ifdef CONFIG_PPC64
 641         /* Setup interrupt mapping options */
 642         ppc64_interrupt_controller = IC_OPEN_PIC;
 643
 644         iommu_init_early_dart();
 645 #endif
 646 }
 647
 648 /*
 649  * pmac has no legacy IO, anything calling this function has to
 650  * fail or bad things will happen
 651  */
 652 static int pmac_check_legacy_ioport(unsigned int baseport)
 653 {
 654         return -ENODEV;
 655 }
 656
 657 static int __init pmac_declare_of_platform_devices(void)
 658 {
 659         struct device_node *np;
 660
 661         np = of_find_node_by_name(NULL, "valkyrie");
 662         if (np)
 663                 of_platform_device_create(np, "valkyrie", NULL);
 664         np = of_find_node_by_name(NULL, "platinum");
 665         if (np)
 666                 of_platform_device_create(np, "platinum", NULL);
 667         np = of_find_node_by_type(NULL, "smu");
 668         if (np) {
 669                 of_platform_device_create(np, "smu", NULL);
 670                 of_node_put(np);
 671         }
 672
 673         return 0;
 674 }
 675
 676 device_initcall(pmac_declare_of_platform_devices);
 677
 678 /*
 679  * Called very early, MMU is off, device-tree isn't unflattened
 680  */
 681 static int __init pmac_probe(int platform)
 682 {
 683 #ifdef CONFIG_PPC64
 684         if (platform != PLATFORM_POWERMAC)
 685                 return 0;
 686
 687         /*
 688          * On U3, the DART (iommu) must be allocated now since it
 689          * has an impact on htab_initialize (due to the large page it
 690          * occupies having to be broken up so the DART itself is not
 691          * part of the cacheable linar mapping
 692          */
 693         alloc_dart_table();
 694 #endif
 695
 696 #ifdef CONFIG_PMAC_SMU
 697         /*
 698          * SMU based G5s need some memory below 2Gb, at least the current
 699          * driver needs that. We have to allocate it now. We allocate 4k
 700          * (1 small page) for now.
 701          */
 702         smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
 703 #endif /* CONFIG_PMAC_SMU */
 704
 705         return 1;
 706 }
 707
 708 #ifdef CONFIG_PPC64
 709 /* Move that to pci.c */
 710 static int pmac_pci_probe_mode(struct pci_bus *bus)
 711 {
 712         struct device_node *node = bus->sysdata;
 713
 714         /* We need to use normal PCI probing for the AGP bus,
 715          * since the device for the AGP bridge isn't in the tree.
 716          */
 717         if (bus->self == NULL && (device_is_compatible(node, "u3-agp") ||
 718                                   device_is_compatible(node, "u4-pcie")))
 719                 return PCI_PROBE_NORMAL;
 720         return PCI_PROBE_DEVTREE;
 721 }
 722 #endif
 723
 724 struct machdep_calls __initdata pmac_md = {
 725 #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
 726         .cpu_die                = generic_mach_cpu_die,
 727 #endif
 728         .probe                  = pmac_probe,
 729         .setup_arch             = pmac_setup_arch,
 730         .init_early             = pmac_init_early,
 731         .show_cpuinfo           = pmac_show_cpuinfo,
 732         .init_IRQ               = pmac_pic_init,
 733         .get_irq                = NULL, /* changed later */
 734         .pcibios_fixup          = pmac_pcibios_fixup,
 735         .restart                = pmac_restart,
 736         .power_off              = pmac_power_off,
 737         .halt                   = pmac_halt,
 738         .time_init              = pmac_time_init,
 739         .get_boot_time          = pmac_get_boot_time,
 740         .set_rtc_time           = pmac_set_rtc_time,
 741         .get_rtc_time           = pmac_get_rtc_time,
 742         .calibrate_decr         = pmac_calibrate_decr,
 743         .feature_call           = pmac_do_feature_call,
 744         .check_legacy_ioport    = pmac_check_legacy_ioport,
 745         .progress               = udbg_progress,
 746 #ifdef CONFIG_PPC64
 747         .pci_probe_mode         = pmac_pci_probe_mode,
 748         .idle_loop              = native_idle,
 749         .enable_pmcs            = power4_enable_pmcs,
 750 #ifdef CONFIG_KEXEC
 751         .machine_kexec          = default_machine_kexec,
 752         .machine_kexec_prepare  = default_machine_kexec_prepare,
 753         .machine_crash_shutdown = default_machine_crash_shutdown,
 754 #endif
 755 #endif /* CONFIG_PPC64 */
 756 #ifdef CONFIG_PPC32
 757         .pcibios_enable_device_hook = pmac_pci_enable_device_hook,
 758         .pcibios_after_init     = pmac_pcibios_after_init,
 759         .phys_mem_access_prot   = pci_phys_mem_access_prot,
 760 #endif
 761 };