arch/sparc64/kernel/prom.c

   1 /*
   2  * Procedures for creating, accessing and interpreting the device tree.
   3  *
   4  * Paul Mackerras       August 1996.
   5  * Copyright (C) 1996-2005 Paul Mackerras.
   6  *
   7  *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
   8  *    {engebret|bergner}@us.ibm.com
   9  *
  10  *  Adapted for sparc64 by David S. Miller davem@davemloft.net
  11  *
  12  *      This program is free software; you can redistribute it and/or
  13  *      modify it under the terms of the GNU General Public License
  14  *      as published by the Free Software Foundation; either version
  15  *      2 of the License, or (at your option) any later version.
  16  */
  17
  18 #include <linux/config.h>
  19 #include <linux/kernel.h>
  20 #include <linux/types.h>
  21 #include <linux/string.h>
  22 #include <linux/mm.h>
  23 #include <linux/bootmem.h>
  24 #include <linux/module.h>
  25
  26 #include <asm/prom.h>
  27 #include <asm/of_device.h>
  28 #include <asm/oplib.h>
  29 #include <asm/irq.h>
  30 #include <asm/asi.h>
  31 #include <asm/upa.h>
  32
  33 static struct device_node *allnodes;
  34
  35 /* use when traversing tree through the allnext, child, sibling,
  36  * or parent members of struct device_node.
  37  */
  38 static DEFINE_RWLOCK(devtree_lock);
  39
  40 int of_device_is_compatible(struct device_node *device, const char *compat)
  41 {
  42         const char* cp;
  43         int cplen, l;
  44
  45         cp = (char *) of_get_property(device, "compatible", &cplen);
  46         if (cp == NULL)
  47                 return 0;
  48         while (cplen > 0) {
  49                 if (strncmp(cp, compat, strlen(compat)) == 0)
  50                         return 1;
  51                 l = strlen(cp) + 1;
  52                 cp += l;
  53                 cplen -= l;
  54         }
  55
  56         return 0;
  57 }
  58 EXPORT_SYMBOL(of_device_is_compatible);
  59
  60 struct device_node *of_get_parent(const struct device_node *node)
  61 {
  62         struct device_node *np;
  63
  64         if (!node)
  65                 return NULL;
  66
  67         np = node->parent;
  68
  69         return np;
  70 }
  71 EXPORT_SYMBOL(of_get_parent);
  72
  73 struct device_node *of_get_next_child(const struct device_node *node,
  74         struct device_node *prev)
  75 {
  76         struct device_node *next;
  77
  78         next = prev ? prev->sibling : node->child;
  79         for (; next != 0; next = next->sibling) {
  80                 break;
  81         }
  82
  83         return next;
  84 }
  85 EXPORT_SYMBOL(of_get_next_child);
  86
  87 struct device_node *of_find_node_by_path(const char *path)
  88 {
  89         struct device_node *np = allnodes;
  90
  91         for (; np != 0; np = np->allnext) {
  92                 if (np->full_name != 0 && strcmp(np->full_name, path) == 0)
  93                         break;
  94         }
  95
  96         return np;
  97 }
  98 EXPORT_SYMBOL(of_find_node_by_path);
  99
 100 struct device_node *of_find_node_by_phandle(phandle handle)
 101 {
 102         struct device_node *np;
 103
 104         for (np = allnodes; np != 0; np = np->allnext)
 105                 if (np->node == handle)
 106                         break;
 107
 108         return np;
 109 }
 110 EXPORT_SYMBOL(of_find_node_by_phandle);
 111
 112 struct device_node *of_find_node_by_name(struct device_node *from,
 113         const char *name)
 114 {
 115         struct device_node *np;
 116
 117         np = from ? from->allnext : allnodes;
 118         for (; np != NULL; np = np->allnext)
 119                 if (np->name != NULL && strcmp(np->name, name) == 0)
 120                         break;
 121
 122         return np;
 123 }
 124 EXPORT_SYMBOL(of_find_node_by_name);
 125
 126 struct device_node *of_find_node_by_type(struct device_node *from,
 127         const char *type)
 128 {
 129         struct device_node *np;
 130
 131         np = from ? from->allnext : allnodes;
 132         for (; np != 0; np = np->allnext)
 133                 if (np->type != 0 && strcmp(np->type, type) == 0)
 134                         break;
 135
 136         return np;
 137 }
 138 EXPORT_SYMBOL(of_find_node_by_type);
 139
 140 struct device_node *of_find_compatible_node(struct device_node *from,
 141         const char *type, const char *compatible)
 142 {
 143         struct device_node *np;
 144
 145         np = from ? from->allnext : allnodes;
 146         for (; np != 0; np = np->allnext) {
 147                 if (type != NULL
 148                     && !(np->type != 0 && strcmp(np->type, type) == 0))
 149                         continue;
 150                 if (of_device_is_compatible(np, compatible))
 151                         break;
 152         }
 153
 154         return np;
 155 }
 156 EXPORT_SYMBOL(of_find_compatible_node);
 157
 158 struct property *of_find_property(struct device_node *np, const char *name,
 159                                   int *lenp)
 160 {
 161         struct property *pp;
 162
 163         for (pp = np->properties; pp != 0; pp = pp->next) {
 164                 if (strcmp(pp->name, name) == 0) {
 165                         if (lenp != 0)
 166                                 *lenp = pp->length;
 167                         break;
 168                 }
 169         }
 170         return pp;
 171 }
 172 EXPORT_SYMBOL(of_find_property);
 173
 174 /*
 175  * Find a property with a given name for a given node
 176  * and return the value.
 177  */
 178 void *of_get_property(struct device_node *np, const char *name, int *lenp)
 179 {
 180         struct property *pp = of_find_property(np,name,lenp);
 181         return pp ? pp->value : NULL;
 182 }
 183 EXPORT_SYMBOL(of_get_property);
 184
 185 int of_getintprop_default(struct device_node *np, const char *name, int def)
 186 {
 187         struct property *prop;
 188         int len;
 189
 190         prop = of_find_property(np, name, &len);
 191         if (!prop || len != 4)
 192                 return def;
 193
 194         return *(int *) prop->value;
 195 }
 196 EXPORT_SYMBOL(of_getintprop_default);
 197
 198 int of_n_addr_cells(struct device_node *np)
 199 {
 200         int* ip;
 201         do {
 202                 if (np->parent)
 203                         np = np->parent;
 204                 ip = of_get_property(np, "#address-cells", NULL);
 205                 if (ip != NULL)
 206                         return *ip;
 207         } while (np->parent);
 208         /* No #address-cells property for the root node, default to 2 */
 209         return 2;
 210 }
 211 EXPORT_SYMBOL(of_n_addr_cells);
 212
 213 int of_n_size_cells(struct device_node *np)
 214 {
 215         int* ip;
 216         do {
 217                 if (np->parent)
 218                         np = np->parent;
 219                 ip = of_get_property(np, "#size-cells", NULL);
 220                 if (ip != NULL)
 221                         return *ip;
 222         } while (np->parent);
 223         /* No #size-cells property for the root node, default to 1 */
 224         return 1;
 225 }
 226 EXPORT_SYMBOL(of_n_size_cells);
 227
 228 int of_set_property(struct device_node *dp, const char *name, void *val, int len)
 229 {
 230         struct property **prevp;
 231         void *new_val;
 232         int err;
 233
 234         new_val = kmalloc(len, GFP_KERNEL);
 235         if (!new_val)
 236                 return -ENOMEM;
 237
 238         memcpy(new_val, val, len);
 239
 240         err = -ENODEV;
 241
 242         write_lock(&devtree_lock);
 243         prevp = &dp->properties;
 244         while (*prevp) {
 245                 struct property *prop = *prevp;
 246
 247                 if (!strcmp(prop->name, name)) {
 248                         void *old_val = prop->value;
 249                         int ret;
 250
 251                         ret = prom_setprop(dp->node, name, val, len);
 252                         err = -EINVAL;
 253                         if (ret >= 0) {
 254                                 prop->value = new_val;
 255                                 prop->length = len;
 256
 257                                 if (OF_IS_DYNAMIC(prop))
 258                                         kfree(old_val);
 259
 260                                 OF_MARK_DYNAMIC(prop);
 261
 262                                 err = 0;
 263                         }
 264                         break;
 265                 }
 266                 prevp = &(*prevp)->next;
 267         }
 268         write_unlock(&devtree_lock);
 269
 270         /* XXX Upate procfs if necessary... */
 271
 272         return err;
 273 }
 274 EXPORT_SYMBOL(of_set_property);
 275
 276 static unsigned int prom_early_allocated;
 277
 278 static void * __init prom_early_alloc(unsigned long size)
 279 {
 280         void *ret;
 281
 282         ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
 283         if (ret != NULL)
 284                 memset(ret, 0, size);
 285
 286         prom_early_allocated += size;
 287
 288         return ret;
 289 }
 290
 291 #ifdef CONFIG_PCI
 292 /* PSYCHO interrupt mapping support. */
 293 #define PSYCHO_IMAP_A_SLOT0     0x0c00UL
 294 #define PSYCHO_IMAP_B_SLOT0     0x0c20UL
 295 static unsigned long psycho_pcislot_imap_offset(unsigned long ino)
 296 {
 297         unsigned int bus =  (ino & 0x10) >> 4;
 298         unsigned int slot = (ino & 0x0c) >> 2;
 299
 300         if (bus == 0)
 301                 return PSYCHO_IMAP_A_SLOT0 + (slot * 8);
 302         else
 303                 return PSYCHO_IMAP_B_SLOT0 + (slot * 8);
 304 }
 305
 306 #define PSYCHO_IMAP_SCSI        0x1000UL
 307 #define PSYCHO_IMAP_ETH         0x1008UL
 308 #define PSYCHO_IMAP_BPP         0x1010UL
 309 #define PSYCHO_IMAP_AU_REC      0x1018UL
 310 #define PSYCHO_IMAP_AU_PLAY     0x1020UL
 311 #define PSYCHO_IMAP_PFAIL       0x1028UL
 312 #define PSYCHO_IMAP_KMS         0x1030UL
 313 #define PSYCHO_IMAP_FLPY        0x1038UL
 314 #define PSYCHO_IMAP_SHW         0x1040UL
 315 #define PSYCHO_IMAP_KBD         0x1048UL
 316 #define PSYCHO_IMAP_MS          0x1050UL
 317 #define PSYCHO_IMAP_SER         0x1058UL
 318 #define PSYCHO_IMAP_TIM0        0x1060UL
 319 #define PSYCHO_IMAP_TIM1        0x1068UL
 320 #define PSYCHO_IMAP_UE          0x1070UL
 321 #define PSYCHO_IMAP_CE          0x1078UL
 322 #define PSYCHO_IMAP_A_ERR       0x1080UL
 323 #define PSYCHO_IMAP_B_ERR       0x1088UL
 324 #define PSYCHO_IMAP_PMGMT       0x1090UL
 325 #define PSYCHO_IMAP_GFX         0x1098UL
 326 #define PSYCHO_IMAP_EUPA        0x10a0UL
 327
 328 static unsigned long __psycho_onboard_imap_off[] = {
 329 /*0x20*/        PSYCHO_IMAP_SCSI,
 330 /*0x21*/        PSYCHO_IMAP_ETH,
 331 /*0x22*/        PSYCHO_IMAP_BPP,
 332 /*0x23*/        PSYCHO_IMAP_AU_REC,
 333 /*0x24*/        PSYCHO_IMAP_AU_PLAY,
 334 /*0x25*/        PSYCHO_IMAP_PFAIL,
 335 /*0x26*/        PSYCHO_IMAP_KMS,
 336 /*0x27*/        PSYCHO_IMAP_FLPY,
 337 /*0x28*/        PSYCHO_IMAP_SHW,
 338 /*0x29*/        PSYCHO_IMAP_KBD,
 339 /*0x2a*/        PSYCHO_IMAP_MS,
 340 /*0x2b*/        PSYCHO_IMAP_SER,
 341 /*0x2c*/        PSYCHO_IMAP_TIM0,
 342 /*0x2d*/        PSYCHO_IMAP_TIM1,
 343 /*0x2e*/        PSYCHO_IMAP_UE,
 344 /*0x2f*/        PSYCHO_IMAP_CE,
 345 /*0x30*/        PSYCHO_IMAP_A_ERR,
 346 /*0x31*/        PSYCHO_IMAP_B_ERR,
 347 /*0x32*/        PSYCHO_IMAP_PMGMT
 348 };
 349 #define PSYCHO_ONBOARD_IRQ_BASE         0x20
 350 #define PSYCHO_ONBOARD_IRQ_LAST         0x32
 351 #define psycho_onboard_imap_offset(__ino) \
 352         __psycho_onboard_imap_off[(__ino) - PSYCHO_ONBOARD_IRQ_BASE]
 353
 354 #define PSYCHO_ICLR_A_SLOT0     0x1400UL
 355 #define PSYCHO_ICLR_SCSI        0x1800UL
 356
 357 #define psycho_iclr_offset(ino)                                       \
 358         ((ino & 0x20) ? (PSYCHO_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
 359                         (PSYCHO_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
 360
 361 static unsigned int psycho_irq_build(struct device_node *dp,
 362                                      unsigned int ino,
 363                                      void *_data)
 364 {
 365         unsigned long controller_regs = (unsigned long) _data;
 366         unsigned long imap, iclr;
 367         unsigned long imap_off, iclr_off;
 368         int inofixup = 0;
 369
 370         ino &= 0x3f;
 371         if (ino < PSYCHO_ONBOARD_IRQ_BASE) {
 372                 /* PCI slot */
 373                 imap_off = psycho_pcislot_imap_offset(ino);
 374         } else {
 375                 /* Onboard device */
 376                 if (ino > PSYCHO_ONBOARD_IRQ_LAST) {
 377                         prom_printf("psycho_irq_build: Wacky INO [%x]\n", ino);
 378                         prom_halt();
 379                 }
 380                 imap_off = psycho_onboard_imap_offset(ino);
 381         }
 382
 383         /* Now build the IRQ bucket. */
 384         imap = controller_regs + imap_off;
 385         imap += 4;
 386
 387         iclr_off = psycho_iclr_offset(ino);
 388         iclr = controller_regs + iclr_off;
 389         iclr += 4;
 390
 391         if ((ino & 0x20) == 0)
 392                 inofixup = ino & 0x03;
 393
 394         return build_irq(inofixup, iclr, imap);
 395 }
 396
 397 static void psycho_irq_trans_init(struct device_node *dp)
 398 {
 399         struct linux_prom64_registers *regs;
 400
 401         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 402         dp->irq_trans->irq_build = psycho_irq_build;
 403
 404         regs = of_get_property(dp, "reg", NULL);
 405         dp->irq_trans->data = (void *) regs[2].phys_addr;
 406 }
 407
 408 #define sabre_read(__reg) \
 409 ({      u64 __ret; \
 410         __asm__ __volatile__("ldxa [%1] %2, %0" \
 411                              : "=r" (__ret) \
 412                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
 413                              : "memory"); \
 414         __ret; \
 415 })
 416
 417 struct sabre_irq_data {
 418         unsigned long controller_regs;
 419         unsigned int pci_first_busno;
 420 };
 421 #define SABRE_CONFIGSPACE       0x001000000UL
 422 #define SABRE_WRSYNC            0x1c20UL
 423
 424 #define SABRE_CONFIG_BASE(CONFIG_SPACE) \
 425         (CONFIG_SPACE | (1UL << 24))
 426 #define SABRE_CONFIG_ENCODE(BUS, DEVFN, REG)    \
 427         (((unsigned long)(BUS)   << 16) |       \
 428          ((unsigned long)(DEVFN) << 8)  |       \
 429          ((unsigned long)(REG)))
 430
 431 /* When a device lives behind a bridge deeper in the PCI bus topology
 432  * than APB, a special sequence must run to make sure all pending DMA
 433  * transfers at the time of IRQ delivery are visible in the coherency
 434  * domain by the cpu.  This sequence is to perform a read on the far
 435  * side of the non-APB bridge, then perform a read of Sabre's DMA
 436  * write-sync register.
 437  */
 438 static void sabre_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 439 {
 440         unsigned int phys_hi = (unsigned int) (unsigned long) _arg1;
 441         struct sabre_irq_data *irq_data = _arg2;
 442         unsigned long controller_regs = irq_data->controller_regs;
 443         unsigned long sync_reg = controller_regs + SABRE_WRSYNC;
 444         unsigned long config_space = controller_regs + SABRE_CONFIGSPACE;
 445         unsigned int bus, devfn;
 446         u16 _unused;
 447
 448         config_space = SABRE_CONFIG_BASE(config_space);
 449
 450         bus = (phys_hi >> 16) & 0xff;
 451         devfn = (phys_hi >> 8) & 0xff;
 452
 453         config_space |= SABRE_CONFIG_ENCODE(bus, devfn, 0x00);
 454
 455         __asm__ __volatile__("membar #Sync\n\t"
 456                              "lduha [%1] %2, %0\n\t"
 457                              "membar #Sync"
 458                              : "=r" (_unused)
 459                              : "r" ((u16 *) config_space),
 460                                "i" (ASI_PHYS_BYPASS_EC_E_L)
 461                              : "memory");
 462
 463         sabre_read(sync_reg);
 464 }
 465
 466 #define SABRE_IMAP_A_SLOT0      0x0c00UL
 467 #define SABRE_IMAP_B_SLOT0      0x0c20UL
 468 #define SABRE_IMAP_SCSI         0x1000UL
 469 #define SABRE_IMAP_ETH          0x1008UL
 470 #define SABRE_IMAP_BPP          0x1010UL
 471 #define SABRE_IMAP_AU_REC       0x1018UL
 472 #define SABRE_IMAP_AU_PLAY      0x1020UL
 473 #define SABRE_IMAP_PFAIL        0x1028UL
 474 #define SABRE_IMAP_KMS          0x1030UL
 475 #define SABRE_IMAP_FLPY         0x1038UL
 476 #define SABRE_IMAP_SHW          0x1040UL
 477 #define SABRE_IMAP_KBD          0x1048UL
 478 #define SABRE_IMAP_MS           0x1050UL
 479 #define SABRE_IMAP_SER          0x1058UL
 480 #define SABRE_IMAP_UE           0x1070UL
 481 #define SABRE_IMAP_CE           0x1078UL
 482 #define SABRE_IMAP_PCIERR       0x1080UL
 483 #define SABRE_IMAP_GFX          0x1098UL
 484 #define SABRE_IMAP_EUPA         0x10a0UL
 485 #define SABRE_ICLR_A_SLOT0      0x1400UL
 486 #define SABRE_ICLR_B_SLOT0      0x1480UL
 487 #define SABRE_ICLR_SCSI         0x1800UL
 488 #define SABRE_ICLR_ETH          0x1808UL
 489 #define SABRE_ICLR_BPP          0x1810UL
 490 #define SABRE_ICLR_AU_REC       0x1818UL
 491 #define SABRE_ICLR_AU_PLAY      0x1820UL
 492 #define SABRE_ICLR_PFAIL        0x1828UL
 493 #define SABRE_ICLR_KMS          0x1830UL
 494 #define SABRE_ICLR_FLPY         0x1838UL
 495 #define SABRE_ICLR_SHW          0x1840UL
 496 #define SABRE_ICLR_KBD          0x1848UL
 497 #define SABRE_ICLR_MS           0x1850UL
 498 #define SABRE_ICLR_SER          0x1858UL
 499 #define SABRE_ICLR_UE           0x1870UL
 500 #define SABRE_ICLR_CE           0x1878UL
 501 #define SABRE_ICLR_PCIERR       0x1880UL
 502
 503 static unsigned long sabre_pcislot_imap_offset(unsigned long ino)
 504 {
 505         unsigned int bus =  (ino & 0x10) >> 4;
 506         unsigned int slot = (ino & 0x0c) >> 2;
 507
 508         if (bus == 0)
 509                 return SABRE_IMAP_A_SLOT0 + (slot * 8);
 510         else
 511                 return SABRE_IMAP_B_SLOT0 + (slot * 8);
 512 }
 513
 514 static unsigned long __sabre_onboard_imap_off[] = {
 515 /*0x20*/        SABRE_IMAP_SCSI,
 516 /*0x21*/        SABRE_IMAP_ETH,
 517 /*0x22*/        SABRE_IMAP_BPP,
 518 /*0x23*/        SABRE_IMAP_AU_REC,
 519 /*0x24*/        SABRE_IMAP_AU_PLAY,
 520 /*0x25*/        SABRE_IMAP_PFAIL,
 521 /*0x26*/        SABRE_IMAP_KMS,
 522 /*0x27*/        SABRE_IMAP_FLPY,
 523 /*0x28*/        SABRE_IMAP_SHW,
 524 /*0x29*/        SABRE_IMAP_KBD,
 525 /*0x2a*/        SABRE_IMAP_MS,
 526 /*0x2b*/        SABRE_IMAP_SER,
 527 /*0x2c*/        0 /* reserved */,
 528 /*0x2d*/        0 /* reserved */,
 529 /*0x2e*/        SABRE_IMAP_UE,
 530 /*0x2f*/        SABRE_IMAP_CE,
 531 /*0x30*/        SABRE_IMAP_PCIERR,
 532 };
 533 #define SABRE_ONBOARD_IRQ_BASE          0x20
 534 #define SABRE_ONBOARD_IRQ_LAST          0x30
 535 #define sabre_onboard_imap_offset(__ino) \
 536         __sabre_onboard_imap_off[(__ino) - SABRE_ONBOARD_IRQ_BASE]
 537
 538 #define sabre_iclr_offset(ino)                                        \
 539         ((ino & 0x20) ? (SABRE_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
 540                         (SABRE_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
 541
 542 static int parent_is_sabre_or_simba(struct device_node *dp)
 543 {
 544         char *parent_model, *parent_compat;
 545
 546         parent_model = of_get_property(dp->parent, "model", NULL);
 547         if (parent_model &&
 548             (!strcmp(parent_model, "SUNW,sabre") ||
 549              !strcmp(parent_model, "SUNW,simba")))
 550                 return 1;
 551
 552         parent_compat = of_get_property(dp->parent, "compatible", NULL);
 553         if (parent_compat &&
 554             (!strcmp(parent_compat, "pci108e,a000") ||
 555              !strcmp(parent_compat, "pci108e,a001")))
 556                 return 1;
 557
 558         return 0;
 559 }
 560
 561 static unsigned int sabre_irq_build(struct device_node *dp,
 562                                     unsigned int ino,
 563                                     void *_data)
 564 {
 565         struct sabre_irq_data *irq_data = _data;
 566         unsigned long controller_regs = irq_data->controller_regs;
 567         struct linux_prom_pci_registers *regs;
 568         unsigned long imap, iclr;
 569         unsigned long imap_off, iclr_off;
 570         int inofixup = 0;
 571         int virt_irq;
 572
 573         ino &= 0x3f;
 574         if (ino < SABRE_ONBOARD_IRQ_BASE) {
 575                 /* PCI slot */
 576                 imap_off = sabre_pcislot_imap_offset(ino);
 577         } else {
 578                 /* onboard device */
 579                 if (ino > SABRE_ONBOARD_IRQ_LAST) {
 580                         prom_printf("sabre_irq_build: Wacky INO [%x]\n", ino);
 581                         prom_halt();
 582                 }
 583                 imap_off = sabre_onboard_imap_offset(ino);
 584         }
 585
 586         /* Now build the IRQ bucket. */
 587         imap = controller_regs + imap_off;
 588         imap += 4;
 589
 590         iclr_off = sabre_iclr_offset(ino);
 591         iclr = controller_regs + iclr_off;
 592         iclr += 4;
 593
 594         if ((ino & 0x20) == 0)
 595                 inofixup = ino & 0x03;
 596
 597         virt_irq = build_irq(inofixup, iclr, imap);
 598
 599         /* If the parent device is a PCI<->PCI bridge other than
 600          * APB, we have to install a pre-handler to ensure that
 601          * all pending DMA is drained before the interrupt handler
 602          * is run.
 603          */
 604         regs = of_get_property(dp, "reg", NULL);
 605         if (regs &&
 606             !parent_is_sabre_or_simba(dp)) {
 607                 irq_install_pre_handler(virt_irq,
 608                                         sabre_wsync_handler,
 609                                         (void *) (long) regs->phys_hi,
 610                                         (void *) irq_data);
 611         }
 612
 613         return virt_irq;
 614 }
 615
 616 static void sabre_irq_trans_init(struct device_node *dp)
 617 {
 618         struct linux_prom64_registers *regs;
 619         struct sabre_irq_data *irq_data;
 620         u32 *busrange;
 621
 622         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 623         dp->irq_trans->irq_build = sabre_irq_build;
 624
 625         irq_data = prom_early_alloc(sizeof(struct sabre_irq_data));
 626
 627         regs = of_get_property(dp, "reg", NULL);
 628         irq_data->controller_regs = regs[0].phys_addr;
 629
 630         busrange = of_get_property(dp, "bus-range", NULL);
 631         irq_data->pci_first_busno = busrange[0];
 632
 633         dp->irq_trans->data = irq_data;
 634 }
 635
 636 /* SCHIZO interrupt mapping support.  Unlike Psycho, for this controller the
 637  * imap/iclr registers are per-PBM.
 638  */
 639 #define SCHIZO_IMAP_BASE        0x1000UL
 640 #define SCHIZO_ICLR_BASE        0x1400UL
 641
 642 static unsigned long schizo_imap_offset(unsigned long ino)
 643 {
 644         return SCHIZO_IMAP_BASE + (ino * 8UL);
 645 }
 646
 647 static unsigned long schizo_iclr_offset(unsigned long ino)
 648 {
 649         return SCHIZO_ICLR_BASE + (ino * 8UL);
 650 }
 651
 652 static unsigned long schizo_ino_to_iclr(unsigned long pbm_regs,
 653                                         unsigned int ino)
 654 {
 655         return pbm_regs + schizo_iclr_offset(ino) + 4;
 656 }
 657
 658 static unsigned long schizo_ino_to_imap(unsigned long pbm_regs,
 659                                         unsigned int ino)
 660 {
 661         return pbm_regs + schizo_imap_offset(ino) + 4;
 662 }
 663
 664 #define schizo_read(__reg) \
 665 ({      u64 __ret; \
 666         __asm__ __volatile__("ldxa [%1] %2, %0" \
 667                              : "=r" (__ret) \
 668                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
 669                              : "memory"); \
 670         __ret; \
 671 })
 672 #define schizo_write(__reg, __val) \
 673         __asm__ __volatile__("stxa %0, [%1] %2" \
 674                              : /* no outputs */ \
 675                              : "r" (__val), "r" (__reg), \
 676                                "i" (ASI_PHYS_BYPASS_EC_E) \
 677                              : "memory")
 678
 679 static void tomatillo_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 680 {
 681         unsigned long sync_reg = (unsigned long) _arg2;
 682         u64 mask = 1UL << (ino & IMAP_INO);
 683         u64 val;
 684         int limit;
 685
 686         schizo_write(sync_reg, mask);
 687
 688         limit = 100000;
 689         val = 0;
 690         while (--limit) {
 691                 val = schizo_read(sync_reg);
 692                 if (!(val & mask))
 693                         break;
 694         }
 695         if (limit <= 0) {
 696                 printk("tomatillo_wsync_handler: DMA won't sync [%lx:%lx]\n",
 697                        val, mask);
 698         }
 699
 700         if (_arg1) {
 701                 static unsigned char cacheline[64]
 702                         __attribute__ ((aligned (64)));
 703
 704                 __asm__ __volatile__("rd %%fprs, %0\n\t"
 705                                      "or %0, %4, %1\n\t"
 706                                      "wr %1, 0x0, %%fprs\n\t"
 707                                      "stda %%f0, [%5] %6\n\t"
 708                                      "wr %0, 0x0, %%fprs\n\t"
 709                                      "membar #Sync"
 710                                      : "=&r" (mask), "=&r" (val)
 711                                      : "0" (mask), "1" (val),
 712                                      "i" (FPRS_FEF), "r" (&cacheline[0]),
 713                                      "i" (ASI_BLK_COMMIT_P));
 714         }
 715 }
 716
 717 struct schizo_irq_data {
 718         unsigned long pbm_regs;
 719         unsigned long sync_reg;
 720         u32 portid;
 721         int chip_version;
 722 };
 723
 724 static unsigned int schizo_irq_build(struct device_node *dp,
 725                                      unsigned int ino,
 726                                      void *_data)
 727 {
 728         struct schizo_irq_data *irq_data = _data;
 729         unsigned long pbm_regs = irq_data->pbm_regs;
 730         unsigned long imap, iclr;
 731         int ign_fixup;
 732         int virt_irq;
 733         int is_tomatillo;
 734
 735         ino &= 0x3f;
 736
 737         /* Now build the IRQ bucket. */
 738         imap = schizo_ino_to_imap(pbm_regs, ino);
 739         iclr = schizo_ino_to_iclr(pbm_regs, ino);
 740
 741         /* On Schizo, no inofixup occurs.  This is because each
 742          * INO has it's own IMAP register.  On Psycho and Sabre
 743          * there is only one IMAP register for each PCI slot even
 744          * though four different INOs can be generated by each
 745          * PCI slot.
 746          *
 747          * But, for JBUS variants (essentially, Tomatillo), we have
 748          * to fixup the lowest bit of the interrupt group number.
 749          */
 750         ign_fixup = 0;
 751
 752         is_tomatillo = (irq_data->sync_reg != 0UL);
 753
 754         if (is_tomatillo) {
 755                 if (irq_data->portid & 1)
 756                         ign_fixup = (1 << 6);
 757         }
 758
 759         virt_irq = build_irq(ign_fixup, iclr, imap);
 760
 761         if (is_tomatillo) {
 762                 irq_install_pre_handler(virt_irq,
 763                                         tomatillo_wsync_handler,
 764                                         ((irq_data->chip_version <= 4) ?
 765                                          (void *) 1 : (void *) 0),
 766                                         (void *) irq_data->sync_reg);
 767         }
 768
 769         return virt_irq;
 770 }
 771
 772 static void schizo_irq_trans_init(struct device_node *dp)
 773 {
 774         struct linux_prom64_registers *regs;
 775         struct schizo_irq_data *irq_data;
 776
 777         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 778         dp->irq_trans->irq_build = schizo_irq_build;
 779
 780         irq_data = prom_early_alloc(sizeof(struct schizo_irq_data));
 781
 782         regs = of_get_property(dp, "reg", NULL);
 783         dp->irq_trans->data = irq_data;
 784
 785         irq_data->pbm_regs = regs[0].phys_addr;
 786         irq_data->sync_reg = regs[3].phys_addr + 0x1a18UL;
 787         irq_data->portid = of_getintprop_default(dp, "portid", 0);
 788         irq_data->chip_version = of_getintprop_default(dp, "version#", 0);
 789 }
 790
 791 static unsigned int pci_sun4v_irq_build(struct device_node *dp,
 792                                         unsigned int devino,
 793                                         void *_data)
 794 {
 795         u32 devhandle = (u32) (unsigned long) _data;
 796
 797         return sun4v_build_irq(devhandle, devino);
 798 }
 799
 800 static void pci_sun4v_irq_trans_init(struct device_node *dp)
 801 {
 802         struct linux_prom64_registers *regs;
 803
 804         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 805         dp->irq_trans->irq_build = pci_sun4v_irq_build;
 806
 807         regs = of_get_property(dp, "reg", NULL);
 808         dp->irq_trans->data = (void *) (unsigned long)
 809                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
 810 }
 811 #endif /* CONFIG_PCI */
 812
 813 #ifdef CONFIG_SBUS
 814 /* INO number to IMAP register offset for SYSIO external IRQ's.
 815  * This should conform to both Sunfire/Wildfire server and Fusion
 816  * desktop designs.
 817  */
 818 #define SYSIO_IMAP_SLOT0        0x2c04UL
 819 #define SYSIO_IMAP_SLOT1        0x2c0cUL
 820 #define SYSIO_IMAP_SLOT2        0x2c14UL
 821 #define SYSIO_IMAP_SLOT3        0x2c1cUL
 822 #define SYSIO_IMAP_SCSI         0x3004UL
 823 #define SYSIO_IMAP_ETH          0x300cUL
 824 #define SYSIO_IMAP_BPP          0x3014UL
 825 #define SYSIO_IMAP_AUDIO        0x301cUL
 826 #define SYSIO_IMAP_PFAIL        0x3024UL
 827 #define SYSIO_IMAP_KMS          0x302cUL
 828 #define SYSIO_IMAP_FLPY         0x3034UL
 829 #define SYSIO_IMAP_SHW          0x303cUL
 830 #define SYSIO_IMAP_KBD          0x3044UL
 831 #define SYSIO_IMAP_MS           0x304cUL
 832 #define SYSIO_IMAP_SER          0x3054UL
 833 #define SYSIO_IMAP_TIM0         0x3064UL
 834 #define SYSIO_IMAP_TIM1         0x306cUL
 835 #define SYSIO_IMAP_UE           0x3074UL
 836 #define SYSIO_IMAP_CE           0x307cUL
 837 #define SYSIO_IMAP_SBERR        0x3084UL
 838 #define SYSIO_IMAP_PMGMT        0x308cUL
 839 #define SYSIO_IMAP_GFX          0x3094UL
 840 #define SYSIO_IMAP_EUPA         0x309cUL
 841
 842 #define bogon     ((unsigned long) -1)
 843 static unsigned long sysio_irq_offsets[] = {
 844         /* SBUS Slot 0 --> 3, level 1 --> 7 */
 845         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 846         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 847         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 848         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 849         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 850         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 851         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 852         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 853
 854         /* Onboard devices (not relevant/used on SunFire). */
 855         SYSIO_IMAP_SCSI,
 856         SYSIO_IMAP_ETH,
 857         SYSIO_IMAP_BPP,
 858         bogon,
 859         SYSIO_IMAP_AUDIO,
 860         SYSIO_IMAP_PFAIL,
 861         bogon,
 862         bogon,
 863         SYSIO_IMAP_KMS,
 864         SYSIO_IMAP_FLPY,
 865         SYSIO_IMAP_SHW,
 866         SYSIO_IMAP_KBD,
 867         SYSIO_IMAP_MS,
 868         SYSIO_IMAP_SER,
 869         bogon,
 870         bogon,
 871         SYSIO_IMAP_TIM0,
 872         SYSIO_IMAP_TIM1,
 873         bogon,
 874         bogon,
 875         SYSIO_IMAP_UE,
 876         SYSIO_IMAP_CE,
 877         SYSIO_IMAP_SBERR,
 878         SYSIO_IMAP_PMGMT,
 879 };
 880
 881 #undef bogon
 882
 883 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
 884
 885 /* Convert Interrupt Mapping register pointer to associated
 886  * Interrupt Clear register pointer, SYSIO specific version.
 887  */
 888 #define SYSIO_ICLR_UNUSED0      0x3400UL
 889 #define SYSIO_ICLR_SLOT0        0x340cUL
 890 #define SYSIO_ICLR_SLOT1        0x344cUL
 891 #define SYSIO_ICLR_SLOT2        0x348cUL
 892 #define SYSIO_ICLR_SLOT3        0x34ccUL
 893 static unsigned long sysio_imap_to_iclr(unsigned long imap)
 894 {
 895         unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
 896         return imap + diff;
 897 }
 898
 899 static unsigned int sbus_of_build_irq(struct device_node *dp,
 900                                       unsigned int ino,
 901                                       void *_data)
 902 {
 903         unsigned long reg_base = (unsigned long) _data;
 904         struct linux_prom_registers *regs;
 905         unsigned long imap, iclr;
 906         int sbus_slot = 0;
 907         int sbus_level = 0;
 908
 909         ino &= 0x3f;
 910
 911         regs = of_get_property(dp, "reg", NULL);
 912         if (regs)
 913                 sbus_slot = regs->which_io;
 914
 915         if (ino < 0x20)
 916                 ino += (sbus_slot * 8);
 917
 918         imap = sysio_irq_offsets[ino];
 919         if (imap == ((unsigned long)-1)) {
 920                 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
 921                             ino);
 922                 prom_halt();
 923         }
 924         imap += reg_base;
 925
 926         /* SYSIO inconsistency.  For external SLOTS, we have to select
 927          * the right ICLR register based upon the lower SBUS irq level
 928          * bits.
 929          */
 930         if (ino >= 0x20) {
 931                 iclr = sysio_imap_to_iclr(imap);
 932         } else {
 933                 sbus_level = ino & 0x7;
 934
 935                 switch(sbus_slot) {
 936                 case 0:
 937                         iclr = reg_base + SYSIO_ICLR_SLOT0;
 938                         break;
 939                 case 1:
 940                         iclr = reg_base + SYSIO_ICLR_SLOT1;
 941                         break;
 942                 case 2:
 943                         iclr = reg_base + SYSIO_ICLR_SLOT2;
 944                         break;
 945                 default:
 946                 case 3:
 947                         iclr = reg_base + SYSIO_ICLR_SLOT3;
 948                         break;
 949                 };
 950
 951                 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
 952         }
 953         return build_irq(sbus_level, iclr, imap);
 954 }
 955
 956 static void sbus_irq_trans_init(struct device_node *dp)
 957 {
 958         struct linux_prom64_registers *regs;
 959
 960         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 961         dp->irq_trans->irq_build = sbus_of_build_irq;
 962
 963         regs = of_get_property(dp, "reg", NULL);
 964         dp->irq_trans->data = (void *) (unsigned long) regs->phys_addr;
 965 }
 966 #endif /* CONFIG_SBUS */
 967
 968
 969 static unsigned int central_build_irq(struct device_node *dp,
 970                                       unsigned int ino,
 971                                       void *_data)
 972 {
 973         struct device_node *central_dp = _data;
 974         struct of_device *central_op = of_find_device_by_node(central_dp);
 975         struct resource *res;
 976         unsigned long imap, iclr;
 977         u32 tmp;
 978
 979         if (!strcmp(dp->name, "eeprom")) {
 980                 res = &central_op->resource[5];
 981         } else if (!strcmp(dp->name, "zs")) {
 982                 res = &central_op->resource[4];
 983         } else if (!strcmp(dp->name, "clock-board")) {
 984                 res = &central_op->resource[3];
 985         } else {
 986                 return ino;
 987         }
 988
 989         imap = res->start + 0x00UL;
 990         iclr = res->start + 0x10UL;
 991
 992         /* Set the INO state to idle, and disable.  */
 993         upa_writel(0, iclr);
 994         upa_readl(iclr);
 995
 996         tmp = upa_readl(imap);
 997         tmp &= ~0x80000000;
 998         upa_writel(tmp, imap);
 999
1000         return build_irq(0, iclr, imap);
1001 }
1002
1003 static void central_irq_trans_init(struct device_node *dp)
1004 {
1005         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
1006         dp->irq_trans->irq_build = central_build_irq;
1007
1008         dp->irq_trans->data = dp;
1009 }
1010
1011 struct irq_trans {
1012         const char *name;
1013         void (*init)(struct device_node *);
1014 };
1015
1016 #ifdef CONFIG_PCI
1017 static struct irq_trans pci_irq_trans_table[] = {
1018         { "SUNW,sabre", sabre_irq_trans_init },
1019         { "pci108e,a000", sabre_irq_trans_init },
1020         { "pci108e,a001", sabre_irq_trans_init },
1021         { "SUNW,psycho", psycho_irq_trans_init },
1022         { "pci108e,8000", psycho_irq_trans_init },
1023         { "SUNW,schizo", schizo_irq_trans_init },
1024         { "pci108e,8001", schizo_irq_trans_init },
1025         { "SUNW,schizo+", schizo_irq_trans_init },
1026         { "pci108e,8002", schizo_irq_trans_init },
1027         { "SUNW,tomatillo", schizo_irq_trans_init },
1028         { "pci108e,a801", schizo_irq_trans_init },
1029         { "SUNW,sun4v-pci", pci_sun4v_irq_trans_init },
1030 };
1031 #endif
1032
1033 static unsigned int sun4v_vdev_irq_build(struct device_node *dp,
1034                                          unsigned int devino,
1035                                          void *_data)
1036 {
1037         u32 devhandle = (u32) (unsigned long) _data;
1038
1039         return sun4v_build_irq(devhandle, devino);
1040 }
1041
1042 static void sun4v_vdev_irq_trans_init(struct device_node *dp)
1043 {
1044         struct linux_prom64_registers *regs;
1045
1046         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
1047         dp->irq_trans->irq_build = sun4v_vdev_irq_build;
1048
1049         regs = of_get_property(dp, "reg", NULL);
1050         dp->irq_trans->data = (void *) (unsigned long)
1051                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
1052 }
1053
1054 static void irq_trans_init(struct device_node *dp)
1055 {
1056         const char *model;
1057 #ifdef CONFIG_PCI
1058         int i;
1059 #endif
1060
1061         model = of_get_property(dp, "model", NULL);
1062         if (!model)
1063                 model = of_get_property(dp, "compatible", NULL);
1064         if (!model)
1065                 return;
1066
1067 #ifdef CONFIG_PCI
1068         for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
1069                 struct irq_trans *t = &pci_irq_trans_table[i];
1070
1071                 if (!strcmp(model, t->name))
1072                         return t->init(dp);
1073         }
1074 #endif
1075 #ifdef CONFIG_SBUS
1076         if (!strcmp(dp->name, "sbus") ||
1077             !strcmp(dp->name, "sbi"))
1078                 return sbus_irq_trans_init(dp);
1079 #endif
1080         if (!strcmp(dp->name, "central"))
1081                 return central_irq_trans_init(dp->child);
1082         if (!strcmp(dp->name, "virtual-devices"))
1083                 return sun4v_vdev_irq_trans_init(dp);
1084 }
1085
1086 static int is_root_node(const struct device_node *dp)
1087 {
1088         if (!dp)
1089                 return 0;
1090
1091         return (dp->parent == NULL);
1092 }
1093
1094 /* The following routines deal with the black magic of fully naming a
1095  * node.
1096  *
1097  * Certain well known named nodes are just the simple name string.
1098  *
1099  * Actual devices have an address specifier appended to the base name
1100  * string, like this "foo@addr".  The "addr" can be in any number of
1101  * formats, and the platform plus the type of the node determine the
1102  * format and how it is constructed.
1103  *
1104  * For children of the ROOT node, the naming convention is fixed and
1105  * determined by whether this is a sun4u or sun4v system.
1106  *
1107  * For children of other nodes, it is bus type specific.  So
1108  * we walk up the tree until we discover a "device_type" property
1109  * we recognize and we go from there.
1110  *
1111  * As an example, the boot device on my workstation has a full path:
1112  *
1113  *      /pci@1e,600000/ide@d/disk@0,0:c
1114  */
1115 static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
1116 {
1117         struct linux_prom64_registers *regs;
1118         struct property *rprop;
1119         u32 high_bits, low_bits, type;
1120
1121         rprop = of_find_property(dp, "reg", NULL);
1122         if (!rprop)
1123                 return;
1124
1125         regs = rprop->value;
1126         if (!is_root_node(dp->parent)) {
1127                 sprintf(tmp_buf, "%s@%x,%x",
1128                         dp->name,
1129                         (unsigned int) (regs->phys_addr >> 32UL),
1130                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1131                 return;
1132         }
1133
1134         type = regs->phys_addr >> 60UL;
1135         high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
1136         low_bits = (regs->phys_addr & 0xffffffffUL);
1137
1138         if (type == 0 || type == 8) {
1139                 const char *prefix = (type == 0) ? "m" : "i";
1140
1141                 if (low_bits)
1142                         sprintf(tmp_buf, "%s@%s%x,%x",
1143                                 dp->name, prefix,
1144                                 high_bits, low_bits);
1145                 else
1146                         sprintf(tmp_buf, "%s@%s%x",
1147                                 dp->name,
1148                                 prefix,
1149                                 high_bits);
1150         } else if (type == 12) {
1151                 sprintf(tmp_buf, "%s@%x",
1152                         dp->name, high_bits);
1153         }
1154 }
1155
1156 static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
1157 {
1158         struct linux_prom64_registers *regs;
1159         struct property *prop;
1160
1161         prop = of_find_property(dp, "reg", NULL);
1162         if (!prop)
1163                 return;
1164
1165         regs = prop->value;
1166         if (!is_root_node(dp->parent)) {
1167                 sprintf(tmp_buf, "%s@%x,%x",
1168                         dp->name,
1169                         (unsigned int) (regs->phys_addr >> 32UL),
1170                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1171                 return;
1172         }
1173
1174         prop = of_find_property(dp, "upa-portid", NULL);
1175         if (!prop)
1176                 prop = of_find_property(dp, "portid", NULL);
1177         if (prop) {
1178                 unsigned long mask = 0xffffffffUL;
1179
1180                 if (tlb_type >= cheetah)
1181                         mask = 0x7fffff;
1182
1183                 sprintf(tmp_buf, "%s@%x,%x",
1184                         dp->name,
1185                         *(u32 *)prop->value,
1186                         (unsigned int) (regs->phys_addr & mask));
1187         }
1188 }
1189
1190 /* "name@slot,offset"  */
1191 static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
1192 {
1193         struct linux_prom_registers *regs;
1194         struct property *prop;
1195
1196         prop = of_find_property(dp, "reg", NULL);
1197         if (!prop)
1198                 return;
1199
1200         regs = prop->value;
1201         sprintf(tmp_buf, "%s@%x,%x",
1202                 dp->name,
1203                 regs->which_io,
1204                 regs->phys_addr);
1205 }
1206
1207 /* "name@devnum[,func]" */
1208 static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
1209 {
1210         struct linux_prom_pci_registers *regs;
1211         struct property *prop;
1212         unsigned int devfn;
1213
1214         prop = of_find_property(dp, "reg", NULL);
1215         if (!prop)
1216                 return;
1217
1218         regs = prop->value;
1219         devfn = (regs->phys_hi >> 8) & 0xff;
1220         if (devfn & 0x07) {
1221                 sprintf(tmp_buf, "%s@%x,%x",
1222                         dp->name,
1223                         devfn >> 3,
1224                         devfn & 0x07);
1225         } else {
1226                 sprintf(tmp_buf, "%s@%x",
1227                         dp->name,
1228                         devfn >> 3);
1229         }
1230 }
1231
1232 /* "name@UPA_PORTID,offset" */
1233 static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
1234 {
1235         struct linux_prom64_registers *regs;
1236         struct property *prop;
1237
1238         prop = of_find_property(dp, "reg", NULL);
1239         if (!prop)
1240                 return;
1241
1242         regs = prop->value;
1243
1244         prop = of_find_property(dp, "upa-portid", NULL);
1245         if (!prop)
1246                 return;
1247
1248         sprintf(tmp_buf, "%s@%x,%x",
1249                 dp->name,
1250                 *(u32 *) prop->value,
1251                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1252 }
1253
1254 /* "name@reg" */
1255 static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
1256 {
1257         struct property *prop;
1258         u32 *regs;
1259
1260         prop = of_find_property(dp, "reg", NULL);
1261         if (!prop)
1262                 return;
1263
1264         regs = prop->value;
1265
1266         sprintf(tmp_buf, "%s@%x", dp->name, *regs);
1267 }
1268
1269 /* "name@addrhi,addrlo" */
1270 static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
1271 {
1272         struct linux_prom64_registers *regs;
1273         struct property *prop;
1274
1275         prop = of_find_property(dp, "reg", NULL);
1276         if (!prop)
1277                 return;
1278
1279         regs = prop->value;
1280
1281         sprintf(tmp_buf, "%s@%x,%x",
1282                 dp->name,
1283                 (unsigned int) (regs->phys_addr >> 32UL),
1284                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1285 }
1286
1287 /* "name@bus,addr" */
1288 static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
1289 {
1290         struct property *prop;
1291         u32 *regs;
1292
1293         prop = of_find_property(dp, "reg", NULL);
1294         if (!prop)
1295                 return;
1296
1297         regs = prop->value;
1298
1299         /* This actually isn't right... should look at the #address-cells
1300          * property of the i2c bus node etc. etc.
1301          */
1302         sprintf(tmp_buf, "%s@%x,%x",
1303                 dp->name, regs[0], regs[1]);
1304 }
1305
1306 /* "name@reg0[,reg1]" */
1307 static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
1308 {
1309         struct property *prop;
1310         u32 *regs;
1311
1312         prop = of_find_property(dp, "reg", NULL);
1313         if (!prop)
1314                 return;
1315
1316         regs = prop->value;
1317
1318         if (prop->length == sizeof(u32) || regs[1] == 1) {
1319                 sprintf(tmp_buf, "%s@%x",
1320                         dp->name, regs[0]);
1321         } else {
1322                 sprintf(tmp_buf, "%s@%x,%x",
1323                         dp->name, regs[0], regs[1]);
1324         }
1325 }
1326
1327 /* "name@reg0reg1[,reg2reg3]" */
1328 static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
1329 {
1330         struct property *prop;
1331         u32 *regs;
1332
1333         prop = of_find_property(dp, "reg", NULL);
1334         if (!prop)
1335                 return;
1336
1337         regs = prop->value;
1338
1339         if (regs[2] || regs[3]) {
1340                 sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
1341                         dp->name, regs[0], regs[1], regs[2], regs[3]);
1342         } else {
1343                 sprintf(tmp_buf, "%s@%08x%08x",
1344                         dp->name, regs[0], regs[1]);
1345         }
1346 }
1347
1348 static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
1349 {
1350         struct device_node *parent = dp->parent;
1351
1352         if (parent != NULL) {
1353                 if (!strcmp(parent->type, "pci") ||
1354                     !strcmp(parent->type, "pciex"))
1355                         return pci_path_component(dp, tmp_buf);
1356                 if (!strcmp(parent->type, "sbus"))
1357                         return sbus_path_component(dp, tmp_buf);
1358                 if (!strcmp(parent->type, "upa"))
1359                         return upa_path_component(dp, tmp_buf);
1360                 if (!strcmp(parent->type, "ebus"))
1361                         return ebus_path_component(dp, tmp_buf);
1362                 if (!strcmp(parent->name, "usb") ||
1363                     !strcmp(parent->name, "hub"))
1364                         return usb_path_component(dp, tmp_buf);
1365                 if (!strcmp(parent->type, "i2c"))
1366                         return i2c_path_component(dp, tmp_buf);
1367                 if (!strcmp(parent->type, "firewire"))
1368                         return ieee1394_path_component(dp, tmp_buf);
1369                 if (!strcmp(parent->type, "virtual-devices"))
1370                         return vdev_path_component(dp, tmp_buf);
1371
1372                 /* "isa" is handled with platform naming */
1373         }
1374
1375         /* Use platform naming convention.  */
1376         if (tlb_type == hypervisor)
1377                 return sun4v_path_component(dp, tmp_buf);
1378         else
1379                 return sun4u_path_component(dp, tmp_buf);
1380 }
1381
1382 static char * __init build_path_component(struct device_node *dp)
1383 {
1384         char tmp_buf[64], *n;
1385
1386         tmp_buf[0] = '\0';
1387         __build_path_component(dp, tmp_buf);
1388         if (tmp_buf[0] == '\0')
1389                 strcpy(tmp_buf, dp->name);
1390
1391         n = prom_early_alloc(strlen(tmp_buf) + 1);
1392         strcpy(n, tmp_buf);
1393
1394         return n;
1395 }
1396
1397 static char * __init build_full_name(struct device_node *dp)
1398 {
1399         int len, ourlen, plen;
1400         char *n;
1401
1402         plen = strlen(dp->parent->full_name);
1403         ourlen = strlen(dp->path_component_name);
1404         len = ourlen + plen + 2;
1405
1406         n = prom_early_alloc(len);
1407         strcpy(n, dp->parent->full_name);
1408         if (!is_root_node(dp->parent)) {
1409                 strcpy(n + plen, "/");
1410                 plen++;
1411         }
1412         strcpy(n + plen, dp->path_component_name);
1413
1414         return n;
1415 }
1416
1417 static unsigned int unique_id;
1418
1419 static struct property * __init build_one_prop(phandle node, char *prev, char *special_name, void *special_val, int special_len)
1420 {
1421         static struct property *tmp = NULL;
1422         struct property *p;
1423
1424         if (tmp) {
1425                 p = tmp;
1426                 memset(p, 0, sizeof(*p) + 32);
1427                 tmp = NULL;
1428         } else {
1429                 p = prom_early_alloc(sizeof(struct property) + 32);
1430                 p->unique_id = unique_id++;
1431         }
1432
1433         p->name = (char *) (p + 1);
1434         if (special_name) {
1435                 strcpy(p->name, special_name);
1436                 p->length = special_len;
1437                 p->value = prom_early_alloc(special_len);
1438                 memcpy(p->value, special_val, special_len);
1439         } else {
1440                 if (prev == NULL) {
1441                         prom_firstprop(node, p->name);
1442                 } else {
1443                         prom_nextprop(node, prev, p->name);
1444                 }
1445                 if (strlen(p->name) == 0) {
1446                         tmp = p;
1447                         return NULL;
1448                 }
1449                 p->length = prom_getproplen(node, p->name);
1450                 if (p->length <= 0) {
1451                         p->length = 0;
1452                 } else {
1453                         p->value = prom_early_alloc(p->length + 1);
1454                         prom_getproperty(node, p->name, p->value, p->length);
1455                         ((unsigned char *)p->value)[p->length] = '\0';
1456                 }
1457         }
1458         return p;
1459 }
1460
1461 static struct property * __init build_prop_list(phandle node)
1462 {
1463         struct property *head, *tail;
1464
1465         head = tail = build_one_prop(node, NULL,
1466                                      ".node", &node, sizeof(node));
1467
1468         tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
1469         tail = tail->next;
1470         while(tail) {
1471                 tail->next = build_one_prop(node, tail->name,
1472                                             NULL, NULL, 0);
1473                 tail = tail->next;
1474         }
1475
1476         return head;
1477 }
1478
1479 static char * __init get_one_property(phandle node, const char *name)
1480 {
1481         char *buf = "<NULL>";
1482         int len;
1483
1484         len = prom_getproplen(node, name);
1485         if (len > 0) {
1486                 buf = prom_early_alloc(len);
1487                 prom_getproperty(node, name, buf, len);
1488         }
1489
1490         return buf;
1491 }
1492
1493 static struct device_node * __init create_node(phandle node)
1494 {
1495         struct device_node *dp;
1496
1497         if (!node)
1498                 return NULL;
1499
1500         dp = prom_early_alloc(sizeof(*dp));
1501         dp->unique_id = unique_id++;
1502
1503         kref_init(&dp->kref);
1504
1505         dp->name = get_one_property(node, "name");
1506         dp->type = get_one_property(node, "device_type");
1507         dp->node = node;
1508
1509         dp->properties = build_prop_list(node);
1510
1511         irq_trans_init(dp);
1512
1513         return dp;
1514 }
1515
1516 static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
1517 {
1518         struct device_node *dp;
1519
1520         dp = create_node(node);
1521         if (dp) {
1522                 *(*nextp) = dp;
1523                 *nextp = &dp->allnext;
1524
1525                 dp->parent = parent;
1526                 dp->path_component_name = build_path_component(dp);
1527                 dp->full_name = build_full_name(dp);
1528
1529                 dp->child = build_tree(dp, prom_getchild(node), nextp);
1530
1531                 dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
1532         }
1533
1534         return dp;
1535 }
1536
1537 void __init prom_build_devicetree(void)
1538 {
1539         struct device_node **nextp;
1540
1541         allnodes = create_node(prom_root_node);
1542         allnodes->path_component_name = "";
1543         allnodes->full_name = "/";
1544
1545         nextp = &allnodes->allnext;
1546         allnodes->child = build_tree(allnodes,
1547                                      prom_getchild(allnodes->node),
1548                                      &nextp);
1549         printk("PROM: Built device tree with %u bytes of memory.\n",
1550                prom_early_allocated);
1551 }