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