arch/ppc/platforms/pmac_setup.c

   1 /*
   2  *  arch/ppc/platforms/setup.c
   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@cs.anu.edu.au)
   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/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/bootx.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
  76 #include "pmac_pic.h"
  77 #include "mem_pieces.h"
  78
  79 #undef SHOW_GATWICK_IRQS
  80
  81 extern long pmac_time_init(void);
  82 extern unsigned long pmac_get_rtc_time(void);
  83 extern int pmac_set_rtc_time(unsigned long nowtime);
  84 extern void pmac_read_rtc_time(void);
  85 extern void pmac_calibrate_decr(void);
  86 extern void pmac_pcibios_fixup(void);
  87 extern void pmac_find_bridges(void);
  88 extern unsigned long pmac_ide_get_base(int index);
  89 extern void pmac_ide_init_hwif_ports(hw_regs_t *hw,
  90         unsigned long data_port, unsigned long ctrl_port, int *irq);
  91
  92 extern void pmac_nvram_update(void);
  93 extern unsigned char pmac_nvram_read_byte(int addr);
  94 extern void pmac_nvram_write_byte(int addr, unsigned char val);
  95 extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial);
  96 extern void pmac_pcibios_after_init(void);
  97 extern int of_show_percpuinfo(struct seq_file *m, int i);
  98
  99 struct device_node *memory_node;
 100
 101 unsigned char drive_info;
 102
 103 int ppc_override_l2cr = 0;
 104 int ppc_override_l2cr_value;
 105 int has_l2cache = 0;
 106
 107 static int current_root_goodness = -1;
 108
 109 extern int pmac_newworld;
 110
 111 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
 112
 113 extern void zs_kgdb_hook(int tty_num);
 114 static void ohare_init(void);
 115 #ifdef CONFIG_BOOTX_TEXT
 116 void pmac_progress(char *s, unsigned short hex);
 117 #endif
 118
 119 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
 120
 121 #ifdef CONFIG_SMP
 122 extern struct smp_ops_t psurge_smp_ops;
 123 extern struct smp_ops_t core99_smp_ops;
 124 #endif /* CONFIG_SMP */
 125
 126 int __pmac
 127 pmac_show_cpuinfo(struct seq_file *m)
 128 {
 129         struct device_node *np;
 130         char *pp;
 131         int plen;
 132         int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 133                 NULL, PMAC_MB_INFO_MODEL, 0);
 134         unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 135                 NULL, PMAC_MB_INFO_FLAGS, 0);
 136         char* mbname;
 137
 138         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0)
 139                 mbname = "Unknown";
 140
 141         /* find motherboard type */
 142         seq_printf(m, "machine\t\t: ");
 143         np = find_devices("device-tree");
 144         if (np != NULL) {
 145                 pp = (char *) get_property(np, "model", NULL);
 146                 if (pp != NULL)
 147                         seq_printf(m, "%s\n", pp);
 148                 else
 149                         seq_printf(m, "PowerMac\n");
 150                 pp = (char *) get_property(np, "compatible", &plen);
 151                 if (pp != NULL) {
 152                         seq_printf(m, "motherboard\t:");
 153                         while (plen > 0) {
 154                                 int l = strlen(pp) + 1;
 155                                 seq_printf(m, " %s", pp);
 156                                 plen -= l;
 157                                 pp += l;
 158                         }
 159                         seq_printf(m, "\n");
 160                 }
 161         } else
 162                 seq_printf(m, "PowerMac\n");
 163
 164         /* print parsed model */
 165         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
 166         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 167
 168         /* find l2 cache info */
 169         np = find_devices("l2-cache");
 170         if (np == 0)
 171                 np = find_type_devices("cache");
 172         if (np != 0) {
 173                 unsigned int *ic = (unsigned int *)
 174                         get_property(np, "i-cache-size", NULL);
 175                 unsigned int *dc = (unsigned int *)
 176                         get_property(np, "d-cache-size", NULL);
 177                 seq_printf(m, "L2 cache\t:");
 178                 has_l2cache = 1;
 179                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
 180                         seq_printf(m, " %dK unified", *dc / 1024);
 181                 } else {
 182                         if (ic)
 183                                 seq_printf(m, " %dK instruction", *ic / 1024);
 184                         if (dc)
 185                                 seq_printf(m, "%s %dK data",
 186                                            (ic? " +": ""), *dc / 1024);
 187                 }
 188                 pp = get_property(np, "ram-type", NULL);
 189                 if (pp)
 190                         seq_printf(m, " %s", pp);
 191                 seq_printf(m, "\n");
 192         }
 193
 194         /* find ram info */
 195         np = find_devices("memory");
 196         if (np != 0) {
 197                 int n;
 198                 struct reg_property *reg = (struct reg_property *)
 199                         get_property(np, "reg", &n);
 200
 201                 if (reg != 0) {
 202                         unsigned long total = 0;
 203
 204                         for (n /= sizeof(struct reg_property); n > 0; --n)
 205                                 total += (reg++)->size;
 206                         seq_printf(m, "memory\t\t: %luMB\n", total >> 20);
 207                 }
 208         }
 209
 210         /* Checks "l2cr-value" property in the registry */
 211         np = find_devices("cpus");
 212         if (np == 0)
 213                 np = find_type_devices("cpu");
 214         if (np != 0) {
 215                 unsigned int *l2cr = (unsigned int *)
 216                         get_property(np, "l2cr-value", NULL);
 217                 if (l2cr != 0) {
 218                         seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr);
 219                 }
 220         }
 221
 222         /* Indicate newworld/oldworld */
 223         seq_printf(m, "pmac-generation\t: %s\n",
 224                    pmac_newworld ? "NewWorld" : "OldWorld");
 225
 226
 227         return 0;
 228 }
 229
 230 int __openfirmware
 231 pmac_show_percpuinfo(struct seq_file *m, int i)
 232 {
 233 #ifdef CONFIG_CPU_FREQ_PMAC
 234         extern unsigned int pmac_get_one_cpufreq(int i);
 235         unsigned int freq = pmac_get_one_cpufreq(i);
 236         if (freq != 0) {
 237                 seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
 238                 return 0;
 239         }
 240 #endif /* CONFIG_CPU_FREQ_PMAC */
 241         return of_show_percpuinfo(m, i);
 242 }
 243
 244 static volatile u32 *sysctrl_regs;
 245
 246 void __init
 247 pmac_setup_arch(void)
 248 {
 249         struct device_node *cpu;
 250         int *fp;
 251         unsigned long pvr;
 252
 253         pvr = PVR_VER(mfspr(SPRN_PVR));
 254
 255         /* Set loops_per_jiffy to a half-way reasonable value,
 256            for use until calibrate_delay gets called. */
 257         cpu = find_type_devices("cpu");
 258         if (cpu != 0) {
 259                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 260                 if (fp != 0) {
 261                         if (pvr == 4 || pvr >= 8)
 262                                 /* 604, G3, G4 etc. */
 263                                 loops_per_jiffy = *fp / HZ;
 264                         else
 265                                 /* 601, 603, etc. */
 266                                 loops_per_jiffy = *fp / (2*HZ);
 267                 } else
 268                         loops_per_jiffy = 50000000 / HZ;
 269         }
 270
 271         /* this area has the CPU identification register
 272            and some registers used by smp boards */
 273         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 274         ohare_init();
 275
 276         /* Lookup PCI hosts */
 277         pmac_find_bridges();
 278
 279         /* Checks "l2cr-value" property in the registry */
 280         if (cpu_has_feature(CPU_FTR_L2CR)) {
 281                 struct device_node *np = find_devices("cpus");
 282                 if (np == 0)
 283                         np = find_type_devices("cpu");
 284                 if (np != 0) {
 285                         unsigned int *l2cr = (unsigned int *)
 286                                 get_property(np, "l2cr-value", NULL);
 287                         if (l2cr != 0) {
 288                                 ppc_override_l2cr = 1;
 289                                 ppc_override_l2cr_value = *l2cr;
 290                                 _set_L2CR(0);
 291                                 _set_L2CR(ppc_override_l2cr_value);
 292                         }
 293                 }
 294         }
 295
 296         if (ppc_override_l2cr)
 297                 printk(KERN_INFO "L2CR overriden (0x%x), backside cache is %s\n",
 298                         ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000)
 299                                 ? "enabled" : "disabled");
 300
 301 #ifdef CONFIG_KGDB
 302         zs_kgdb_hook(0);
 303 #endif
 304
 305 #ifdef CONFIG_ADB_CUDA
 306         find_via_cuda();
 307 #else
 308         if (find_devices("via-cuda")) {
 309                 printk("WARNING ! Your machine is Cuda based but your kernel\n");
 310                 printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
 311         }
 312 #endif
 313 #ifdef CONFIG_ADB_PMU
 314         find_via_pmu();
 315 #else
 316         if (find_devices("via-pmu")) {
 317                 printk("WARNING ! Your machine is PMU based but your kernel\n");
 318                 printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
 319         }
 320 #endif
 321 #ifdef CONFIG_NVRAM
 322         pmac_nvram_init();
 323 #endif
 324 #ifdef CONFIG_BLK_DEV_INITRD
 325         if (initrd_start)
 326                 ROOT_DEV = Root_RAM0;
 327         else
 328 #endif
 329                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
 330
 331 #ifdef CONFIG_SMP
 332         /* Check for Core99 */
 333         if (find_devices("uni-n") || find_devices("u3"))
 334                 ppc_md.smp_ops = &core99_smp_ops;
 335         else
 336                 ppc_md.smp_ops = &psurge_smp_ops;
 337 #endif /* CONFIG_SMP */
 338
 339         pci_create_OF_bus_map();
 340 }
 341
 342 static void __init ohare_init(void)
 343 {
 344         /*
 345          * Turn on the L2 cache.
 346          * We assume that we have a PSX memory controller iff
 347          * we have an ohare I/O controller.
 348          */
 349         if (find_devices("ohare") != NULL) {
 350                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
 351                         if (sysctrl_regs[4] & 0x10)
 352                                 sysctrl_regs[4] |= 0x04000020;
 353                         else
 354                                 sysctrl_regs[4] |= 0x04000000;
 355                         if(has_l2cache)
 356                                 printk(KERN_INFO "Level 2 cache enabled\n");
 357                 }
 358         }
 359 }
 360
 361 extern char *bootpath;
 362 extern char *bootdevice;
 363 void *boot_host;
 364 int boot_target;
 365 int boot_part;
 366 extern dev_t boot_dev;
 367
 368 #ifdef CONFIG_SCSI
 369 void __init
 370 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 #endif
 398
 399 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 400 static dev_t __init
 401 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 void __init
 419 find_boot_device(void)
 420 {
 421 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 422         boot_dev = find_ide_boot();
 423 #endif
 424 }
 425
 426 static int initializing = 1;
 427 /* TODO: Merge the suspend-to-ram with the common code !!!
 428  * currently, this is a stub implementation for suspend-to-disk
 429  * only
 430  */
 431
 432 #ifdef CONFIG_SOFTWARE_SUSPEND
 433
 434 static int pmac_pm_prepare(suspend_state_t state)
 435 {
 436         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 437
 438         return 0;
 439 }
 440
 441 static int pmac_pm_enter(suspend_state_t state)
 442 {
 443         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 444
 445         /* Giveup the lazy FPU & vec so we don't have to back them
 446          * up from the low level code
 447          */
 448         enable_kernel_fp();
 449
 450 #ifdef CONFIG_ALTIVEC
 451         if (cur_cpu_spec[0]->cpu_features & CPU_FTR_ALTIVEC)
 452                 enable_kernel_altivec();
 453 #endif /* CONFIG_ALTIVEC */
 454
 455         return 0;
 456 }
 457
 458 static int pmac_pm_finish(suspend_state_t state)
 459 {
 460         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
 461
 462         /* Restore userland MMU context */
 463         set_context(current->active_mm->context, current->active_mm->pgd);
 464
 465         return 0;
 466 }
 467
 468 static struct pm_ops pmac_pm_ops = {
 469         .pm_disk_mode   = PM_DISK_SHUTDOWN,
 470         .prepare        = pmac_pm_prepare,
 471         .enter          = pmac_pm_enter,
 472         .finish         = pmac_pm_finish,
 473 };
 474
 475 #endif /* CONFIG_SOFTWARE_SUSPEND */
 476
 477 static int pmac_late_init(void)
 478 {
 479         initializing = 0;
 480 #ifdef CONFIG_SOFTWARE_SUSPEND
 481         pm_set_ops(&pmac_pm_ops);
 482 #endif /* CONFIG_SOFTWARE_SUSPEND */
 483         return 0;
 484 }
 485
 486 late_initcall(pmac_late_init);
 487
 488 /* can't be __init - can be called whenever a disk is first accessed */
 489 void __pmac
 490 note_bootable_part(dev_t dev, int part, int goodness)
 491 {
 492         static int found_boot = 0;
 493         char *p;
 494
 495         if (!initializing)
 496                 return;
 497         if ((goodness <= current_root_goodness) &&
 498             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 499                 return;
 500         p = strstr(saved_command_line, "root=");
 501         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 502                 return;
 503
 504         if (!found_boot) {
 505                 find_boot_device();
 506                 found_boot = 1;
 507         }
 508         if (!boot_dev || dev == boot_dev) {
 509                 ROOT_DEV = dev + part;
 510                 boot_dev = 0;
 511                 current_root_goodness = goodness;
 512         }
 513 }
 514
 515 void __pmac
 516 pmac_restart(char *cmd)
 517 {
 518 #ifdef CONFIG_ADB_CUDA
 519         struct adb_request req;
 520 #endif /* CONFIG_ADB_CUDA */
 521
 522         switch (sys_ctrler) {
 523 #ifdef CONFIG_ADB_CUDA
 524         case SYS_CTRLER_CUDA:
 525                 cuda_request(&req, NULL, 2, CUDA_PACKET,
 526                              CUDA_RESET_SYSTEM);
 527                 for (;;)
 528                         cuda_poll();
 529                 break;
 530 #endif /* CONFIG_ADB_CUDA */
 531 #ifdef CONFIG_ADB_PMU
 532         case SYS_CTRLER_PMU:
 533                 pmu_restart();
 534                 break;
 535 #endif /* CONFIG_ADB_PMU */
 536         default: ;
 537         }
 538 }
 539
 540 void __pmac
 541 pmac_power_off(void)
 542 {
 543 #ifdef CONFIG_ADB_CUDA
 544         struct adb_request req;
 545 #endif /* CONFIG_ADB_CUDA */
 546
 547         switch (sys_ctrler) {
 548 #ifdef CONFIG_ADB_CUDA
 549         case SYS_CTRLER_CUDA:
 550                 cuda_request(&req, NULL, 2, CUDA_PACKET,
 551                              CUDA_POWERDOWN);
 552                 for (;;)
 553                         cuda_poll();
 554                 break;
 555 #endif /* CONFIG_ADB_CUDA */
 556 #ifdef CONFIG_ADB_PMU
 557         case SYS_CTRLER_PMU:
 558                 pmu_shutdown();
 559                 break;
 560 #endif /* CONFIG_ADB_PMU */
 561         default: ;
 562         }
 563 }
 564
 565 void __pmac
 566 pmac_halt(void)
 567 {
 568    pmac_power_off();
 569 }
 570
 571 /*
 572  * Read in a property describing some pieces of memory.
 573  */
 574
 575 static int __init
 576 get_mem_prop(char *name, struct mem_pieces *mp)
 577 {
 578         struct reg_property *rp;
 579         int i, s;
 580         unsigned int *ip;
 581         int nac = prom_n_addr_cells(memory_node);
 582         int nsc = prom_n_size_cells(memory_node);
 583
 584         ip = (unsigned int *) get_property(memory_node, name, &s);
 585         if (ip == NULL) {
 586                 printk(KERN_ERR "error: couldn't get %s property on /memory\n",
 587                        name);
 588                 return 0;
 589         }
 590         s /= (nsc + nac) * 4;
 591         rp = mp->regions;
 592         for (i = 0; i < s; ++i, ip += nac+nsc) {
 593                 if (nac >= 2 && ip[nac-2] != 0)
 594                         continue;
 595                 rp->address = ip[nac-1];
 596                 if (nsc >= 2 && ip[nac+nsc-2] != 0)
 597                         rp->size = ~0U;
 598                 else
 599                         rp->size = ip[nac+nsc-1];
 600                 ++rp;
 601         }
 602         mp->n_regions = rp - mp->regions;
 603
 604         /* Make sure the pieces are sorted. */
 605         mem_pieces_sort(mp);
 606         mem_pieces_coalesce(mp);
 607         return 1;
 608 }
 609
 610 /*
 611  * On systems with Open Firmware, collect information about
 612  * physical RAM and which pieces are already in use.
 613  * At this point, we have (at least) the first 8MB mapped with a BAT.
 614  * Our text, data, bss use something over 1MB, starting at 0.
 615  * Open Firmware may be using 1MB at the 4MB point.
 616  */
 617 unsigned long __init
 618 pmac_find_end_of_memory(void)
 619 {
 620         unsigned long a, total;
 621         struct mem_pieces phys_mem;
 622
 623         /*
 624          * Find out where physical memory is, and check that it
 625          * starts at 0 and is contiguous.  It seems that RAM is
 626          * always physically contiguous on Power Macintoshes.
 627          *
 628          * Supporting discontiguous physical memory isn't hard,
 629          * it just makes the virtual <-> physical mapping functions
 630          * more complicated (or else you end up wasting space
 631          * in mem_map).
 632          */
 633         memory_node = find_devices("memory");
 634         if (memory_node == NULL || !get_mem_prop("reg", &phys_mem)
 635             || phys_mem.n_regions == 0)
 636                 panic("No RAM??");
 637         a = phys_mem.regions[0].address;
 638         if (a != 0)
 639                 panic("RAM doesn't start at physical address 0");
 640         total = phys_mem.regions[0].size;
 641
 642         if (phys_mem.n_regions > 1) {
 643                 printk("RAM starting at 0x%x is not contiguous\n",
 644                        phys_mem.regions[1].address);
 645                 printk("Using RAM from 0 to 0x%lx\n", total-1);
 646         }
 647
 648         return total;
 649 }
 650
 651 void __init
 652 pmac_init(unsigned long r3, unsigned long r4, unsigned long r5,
 653           unsigned long r6, unsigned long r7)
 654 {
 655         /* isa_io_base gets set in pmac_find_bridges */
 656         isa_mem_base = PMAC_ISA_MEM_BASE;
 657         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
 658         ISA_DMA_THRESHOLD = ~0L;
 659         DMA_MODE_READ = 1;
 660         DMA_MODE_WRITE = 2;
 661
 662         ppc_md.setup_arch     = pmac_setup_arch;
 663         ppc_md.show_cpuinfo   = pmac_show_cpuinfo;
 664         ppc_md.show_percpuinfo = pmac_show_percpuinfo;
 665         ppc_md.irq_canonicalize = NULL;
 666         ppc_md.init_IRQ       = pmac_pic_init;
 667         ppc_md.get_irq        = pmac_get_irq; /* Changed later on ... */
 668
 669         ppc_md.pcibios_fixup  = pmac_pcibios_fixup;
 670         ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
 671         ppc_md.pcibios_after_init = pmac_pcibios_after_init;
 672         ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
 673
 674         ppc_md.restart        = pmac_restart;
 675         ppc_md.power_off      = pmac_power_off;
 676         ppc_md.halt           = pmac_halt;
 677
 678         ppc_md.time_init      = pmac_time_init;
 679         ppc_md.set_rtc_time   = pmac_set_rtc_time;
 680         ppc_md.get_rtc_time   = pmac_get_rtc_time;
 681         ppc_md.calibrate_decr = pmac_calibrate_decr;
 682
 683         ppc_md.find_end_of_memory = pmac_find_end_of_memory;
 684
 685         ppc_md.feature_call   = pmac_do_feature_call;
 686
 687 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 688 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 689         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
 690         ppc_ide_md.default_io_base      = pmac_ide_get_base;
 691 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 692 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
 693
 694 #ifdef CONFIG_BOOTX_TEXT
 695         ppc_md.progress = pmac_progress;
 696 #endif /* CONFIG_BOOTX_TEXT */
 697
 698         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 699
 700 }
 701
 702 #ifdef CONFIG_BOOTX_TEXT
 703 void __init
 704 pmac_progress(char *s, unsigned short hex)
 705 {
 706         if (boot_text_mapped) {
 707                 btext_drawstring(s);
 708                 btext_drawchar('\n');
 709         }
 710 }
 711 #endif /* CONFIG_BOOTX_TEXT */
 712
 713 static int __init
 714 pmac_declare_of_platform_devices(void)
 715 {
 716         struct device_node *np;
 717
 718         np = find_devices("uni-n");
 719         if (np) {
 720                 for (np = np->child; np != NULL; np = np->sibling)
 721                         if (strncmp(np->name, "i2c", 3) == 0) {
 722                                 of_platform_device_create(np, "uni-n-i2c");
 723                                 break;
 724                         }
 725         }
 726         np = find_devices("u3");
 727         if (np) {
 728                 for (np = np->child; np != NULL; np = np->sibling)
 729                         if (strncmp(np->name, "i2c", 3) == 0) {
 730                                 of_platform_device_create(np, "u3-i2c");
 731                                 break;
 732                         }
 733         }
 734
 735         np = find_devices("valkyrie");
 736         if (np)
 737                 of_platform_device_create(np, "valkyrie");
 738         np = find_devices("platinum");
 739         if (np)
 740                 of_platform_device_create(np, "platinum");
 741
 742         return 0;
 743 }
 744
 745 device_initcall(pmac_declare_of_platform_devices);