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 unsigned int sabre_irq_build(struct device_node *dp,
 543                                     unsigned int ino,
 544                                     void *_data)
 545 {
 546         struct sabre_irq_data *irq_data = _data;
 547         unsigned long controller_regs = irq_data->controller_regs;
 548         struct linux_prom_pci_registers *regs;
 549         unsigned long imap, iclr;
 550         unsigned long imap_off, iclr_off;
 551         int inofixup = 0;
 552         int virt_irq;
 553
 554         ino &= 0x3f;
 555         if (ino < SABRE_ONBOARD_IRQ_BASE) {
 556                 /* PCI slot */
 557                 imap_off = sabre_pcislot_imap_offset(ino);
 558         } else {
 559                 /* onboard device */
 560                 if (ino > SABRE_ONBOARD_IRQ_LAST) {
 561                         prom_printf("sabre_irq_build: Wacky INO [%x]\n", ino);
 562                         prom_halt();
 563                 }
 564                 imap_off = sabre_onboard_imap_offset(ino);
 565         }
 566
 567         /* Now build the IRQ bucket. */
 568         imap = controller_regs + imap_off;
 569         imap += 4;
 570
 571         iclr_off = sabre_iclr_offset(ino);
 572         iclr = controller_regs + iclr_off;
 573         iclr += 4;
 574
 575         if ((ino & 0x20) == 0)
 576                 inofixup = ino & 0x03;
 577
 578         virt_irq = build_irq(inofixup, iclr, imap);
 579
 580         regs = of_get_property(dp, "reg", NULL);
 581         if (regs &&
 582             ((regs->phys_hi >> 16) & 0xff) != irq_data->pci_first_busno) {
 583                 irq_install_pre_handler(virt_irq,
 584                                         sabre_wsync_handler,
 585                                         (void *) (long) regs->phys_hi,
 586                                         (void *)
 587                                         controller_regs +
 588                                         SABRE_WRSYNC);
 589         }
 590
 591         return virt_irq;
 592 }
 593
 594 static void sabre_irq_trans_init(struct device_node *dp)
 595 {
 596         struct linux_prom64_registers *regs;
 597         struct sabre_irq_data *irq_data;
 598         u32 *busrange;
 599
 600         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 601         dp->irq_trans->irq_build = sabre_irq_build;
 602
 603         irq_data = prom_early_alloc(sizeof(struct sabre_irq_data));
 604
 605         regs = of_get_property(dp, "reg", NULL);
 606         irq_data->controller_regs = regs[0].phys_addr;
 607
 608         busrange = of_get_property(dp, "bus-range", NULL);
 609         irq_data->pci_first_busno = busrange[0];
 610
 611         dp->irq_trans->data = irq_data;
 612 }
 613
 614 /* SCHIZO interrupt mapping support.  Unlike Psycho, for this controller the
 615  * imap/iclr registers are per-PBM.
 616  */
 617 #define SCHIZO_IMAP_BASE        0x1000UL
 618 #define SCHIZO_ICLR_BASE        0x1400UL
 619
 620 static unsigned long schizo_imap_offset(unsigned long ino)
 621 {
 622         return SCHIZO_IMAP_BASE + (ino * 8UL);
 623 }
 624
 625 static unsigned long schizo_iclr_offset(unsigned long ino)
 626 {
 627         return SCHIZO_ICLR_BASE + (ino * 8UL);
 628 }
 629
 630 static unsigned long schizo_ino_to_iclr(unsigned long pbm_regs,
 631                                         unsigned int ino)
 632 {
 633         return pbm_regs + schizo_iclr_offset(ino) + 4;
 634 }
 635
 636 static unsigned long schizo_ino_to_imap(unsigned long pbm_regs,
 637                                         unsigned int ino)
 638 {
 639         return pbm_regs + schizo_imap_offset(ino) + 4;
 640 }
 641
 642 #define schizo_read(__reg) \
 643 ({      u64 __ret; \
 644         __asm__ __volatile__("ldxa [%1] %2, %0" \
 645                              : "=r" (__ret) \
 646                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
 647                              : "memory"); \
 648         __ret; \
 649 })
 650 #define schizo_write(__reg, __val) \
 651         __asm__ __volatile__("stxa %0, [%1] %2" \
 652                              : /* no outputs */ \
 653                              : "r" (__val), "r" (__reg), \
 654                                "i" (ASI_PHYS_BYPASS_EC_E) \
 655                              : "memory")
 656
 657 static void tomatillo_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 658 {
 659         unsigned long sync_reg = (unsigned long) _arg2;
 660         u64 mask = 1UL << (ino & IMAP_INO);
 661         u64 val;
 662         int limit;
 663
 664         schizo_write(sync_reg, mask);
 665
 666         limit = 100000;
 667         val = 0;
 668         while (--limit) {
 669                 val = schizo_read(sync_reg);
 670                 if (!(val & mask))
 671                         break;
 672         }
 673         if (limit <= 0) {
 674                 printk("tomatillo_wsync_handler: DMA won't sync [%lx:%lx]\n",
 675                        val, mask);
 676         }
 677
 678         if (_arg1) {
 679                 static unsigned char cacheline[64]
 680                         __attribute__ ((aligned (64)));
 681
 682                 __asm__ __volatile__("rd %%fprs, %0\n\t"
 683                                      "or %0, %4, %1\n\t"
 684                                      "wr %1, 0x0, %%fprs\n\t"
 685                                      "stda %%f0, [%5] %6\n\t"
 686                                      "wr %0, 0x0, %%fprs\n\t"
 687                                      "membar #Sync"
 688                                      : "=&r" (mask), "=&r" (val)
 689                                      : "0" (mask), "1" (val),
 690                                      "i" (FPRS_FEF), "r" (&cacheline[0]),
 691                                      "i" (ASI_BLK_COMMIT_P));
 692         }
 693 }
 694
 695 struct schizo_irq_data {
 696         unsigned long pbm_regs;
 697         unsigned long sync_reg;
 698         u32 portid;
 699         int chip_version;
 700 };
 701
 702 static unsigned int schizo_irq_build(struct device_node *dp,
 703                                      unsigned int ino,
 704                                      void *_data)
 705 {
 706         struct schizo_irq_data *irq_data = _data;
 707         unsigned long pbm_regs = irq_data->pbm_regs;
 708         unsigned long imap, iclr;
 709         int ign_fixup;
 710         int virt_irq;
 711         int is_tomatillo;
 712
 713         ino &= 0x3f;
 714
 715         /* Now build the IRQ bucket. */
 716         imap = schizo_ino_to_imap(pbm_regs, ino);
 717         iclr = schizo_ino_to_iclr(pbm_regs, ino);
 718
 719         /* On Schizo, no inofixup occurs.  This is because each
 720          * INO has it's own IMAP register.  On Psycho and Sabre
 721          * there is only one IMAP register for each PCI slot even
 722          * though four different INOs can be generated by each
 723          * PCI slot.
 724          *
 725          * But, for JBUS variants (essentially, Tomatillo), we have
 726          * to fixup the lowest bit of the interrupt group number.
 727          */
 728         ign_fixup = 0;
 729
 730         is_tomatillo = (irq_data->sync_reg != 0UL);
 731
 732         if (is_tomatillo) {
 733                 if (irq_data->portid & 1)
 734                         ign_fixup = (1 << 6);
 735         }
 736
 737         virt_irq = build_irq(ign_fixup, iclr, imap);
 738
 739         if (is_tomatillo) {
 740                 irq_install_pre_handler(virt_irq,
 741                                         tomatillo_wsync_handler,
 742                                         ((irq_data->chip_version <= 4) ?
 743                                          (void *) 1 : (void *) 0),
 744                                         (void *) irq_data->sync_reg);
 745         }
 746
 747         return virt_irq;
 748 }
 749
 750 static void schizo_irq_trans_init(struct device_node *dp)
 751 {
 752         struct linux_prom64_registers *regs;
 753         struct schizo_irq_data *irq_data;
 754
 755         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 756         dp->irq_trans->irq_build = schizo_irq_build;
 757
 758         irq_data = prom_early_alloc(sizeof(struct schizo_irq_data));
 759
 760         regs = of_get_property(dp, "reg", NULL);
 761         dp->irq_trans->data = irq_data;
 762
 763         irq_data->pbm_regs = regs[0].phys_addr;
 764         irq_data->sync_reg = regs[3].phys_addr + 0x1a18UL;
 765         irq_data->portid = of_getintprop_default(dp, "portid", 0);
 766         irq_data->chip_version = of_getintprop_default(dp, "version#", 0);
 767 }
 768
 769 static unsigned int pci_sun4v_irq_build(struct device_node *dp,
 770                                         unsigned int devino,
 771                                         void *_data)
 772 {
 773         u32 devhandle = (u32) (unsigned long) _data;
 774
 775         return sun4v_build_irq(devhandle, devino);
 776 }
 777
 778 static void pci_sun4v_irq_trans_init(struct device_node *dp)
 779 {
 780         struct linux_prom64_registers *regs;
 781
 782         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 783         dp->irq_trans->irq_build = pci_sun4v_irq_build;
 784
 785         regs = of_get_property(dp, "reg", NULL);
 786         dp->irq_trans->data = (void *) (unsigned long)
 787                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
 788 }
 789 #endif /* CONFIG_PCI */
 790
 791 #ifdef CONFIG_SBUS
 792 /* INO number to IMAP register offset for SYSIO external IRQ's.
 793  * This should conform to both Sunfire/Wildfire server and Fusion
 794  * desktop designs.
 795  */
 796 #define SYSIO_IMAP_SLOT0        0x2c04UL
 797 #define SYSIO_IMAP_SLOT1        0x2c0cUL
 798 #define SYSIO_IMAP_SLOT2        0x2c14UL
 799 #define SYSIO_IMAP_SLOT3        0x2c1cUL
 800 #define SYSIO_IMAP_SCSI         0x3004UL
 801 #define SYSIO_IMAP_ETH          0x300cUL
 802 #define SYSIO_IMAP_BPP          0x3014UL
 803 #define SYSIO_IMAP_AUDIO        0x301cUL
 804 #define SYSIO_IMAP_PFAIL        0x3024UL
 805 #define SYSIO_IMAP_KMS          0x302cUL
 806 #define SYSIO_IMAP_FLPY         0x3034UL
 807 #define SYSIO_IMAP_SHW          0x303cUL
 808 #define SYSIO_IMAP_KBD          0x3044UL
 809 #define SYSIO_IMAP_MS           0x304cUL
 810 #define SYSIO_IMAP_SER          0x3054UL
 811 #define SYSIO_IMAP_TIM0         0x3064UL
 812 #define SYSIO_IMAP_TIM1         0x306cUL
 813 #define SYSIO_IMAP_UE           0x3074UL
 814 #define SYSIO_IMAP_CE           0x307cUL
 815 #define SYSIO_IMAP_SBERR        0x3084UL
 816 #define SYSIO_IMAP_PMGMT        0x308cUL
 817 #define SYSIO_IMAP_GFX          0x3094UL
 818 #define SYSIO_IMAP_EUPA         0x309cUL
 819
 820 #define bogon     ((unsigned long) -1)
 821 static unsigned long sysio_irq_offsets[] = {
 822         /* SBUS Slot 0 --> 3, level 1 --> 7 */
 823         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 824         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 825         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 826         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 827         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 828         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 829         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 830         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 831
 832         /* Onboard devices (not relevant/used on SunFire). */
 833         SYSIO_IMAP_SCSI,
 834         SYSIO_IMAP_ETH,
 835         SYSIO_IMAP_BPP,
 836         bogon,
 837         SYSIO_IMAP_AUDIO,
 838         SYSIO_IMAP_PFAIL,
 839         bogon,
 840         bogon,
 841         SYSIO_IMAP_KMS,
 842         SYSIO_IMAP_FLPY,
 843         SYSIO_IMAP_SHW,
 844         SYSIO_IMAP_KBD,
 845         SYSIO_IMAP_MS,
 846         SYSIO_IMAP_SER,
 847         bogon,
 848         bogon,
 849         SYSIO_IMAP_TIM0,
 850         SYSIO_IMAP_TIM1,
 851         bogon,
 852         bogon,
 853         SYSIO_IMAP_UE,
 854         SYSIO_IMAP_CE,
 855         SYSIO_IMAP_SBERR,
 856         SYSIO_IMAP_PMGMT,
 857 };
 858
 859 #undef bogon
 860
 861 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
 862
 863 /* Convert Interrupt Mapping register pointer to associated
 864  * Interrupt Clear register pointer, SYSIO specific version.
 865  */
 866 #define SYSIO_ICLR_UNUSED0      0x3400UL
 867 #define SYSIO_ICLR_SLOT0        0x340cUL
 868 #define SYSIO_ICLR_SLOT1        0x344cUL
 869 #define SYSIO_ICLR_SLOT2        0x348cUL
 870 #define SYSIO_ICLR_SLOT3        0x34ccUL
 871 static unsigned long sysio_imap_to_iclr(unsigned long imap)
 872 {
 873         unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
 874         return imap + diff;
 875 }
 876
 877 static unsigned int sbus_of_build_irq(struct device_node *dp,
 878                                       unsigned int ino,
 879                                       void *_data)
 880 {
 881         unsigned long reg_base = (unsigned long) _data;
 882         struct linux_prom_registers *regs;
 883         unsigned long imap, iclr;
 884         int sbus_slot = 0;
 885         int sbus_level = 0;
 886
 887         ino &= 0x3f;
 888
 889         regs = of_get_property(dp, "reg", NULL);
 890         if (regs)
 891                 sbus_slot = regs->which_io;
 892
 893         if (ino < 0x20)
 894                 ino += (sbus_slot * 8);
 895
 896         imap = sysio_irq_offsets[ino];
 897         if (imap == ((unsigned long)-1)) {
 898                 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
 899                             ino);
 900                 prom_halt();
 901         }
 902         imap += reg_base;
 903
 904         /* SYSIO inconsistency.  For external SLOTS, we have to select
 905          * the right ICLR register based upon the lower SBUS irq level
 906          * bits.
 907          */
 908         if (ino >= 0x20) {
 909                 iclr = sysio_imap_to_iclr(imap);
 910         } else {
 911                 sbus_level = ino & 0x7;
 912
 913                 switch(sbus_slot) {
 914                 case 0:
 915                         iclr = reg_base + SYSIO_ICLR_SLOT0;
 916                         break;
 917                 case 1:
 918                         iclr = reg_base + SYSIO_ICLR_SLOT1;
 919                         break;
 920                 case 2:
 921                         iclr = reg_base + SYSIO_ICLR_SLOT2;
 922                         break;
 923                 default:
 924                 case 3:
 925                         iclr = reg_base + SYSIO_ICLR_SLOT3;
 926                         break;
 927                 };
 928
 929                 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
 930         }
 931         return build_irq(sbus_level, iclr, imap);
 932 }
 933
 934 static void sbus_irq_trans_init(struct device_node *dp)
 935 {
 936         struct linux_prom64_registers *regs;
 937
 938         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 939         dp->irq_trans->irq_build = sbus_of_build_irq;
 940
 941         regs = of_get_property(dp, "reg", NULL);
 942         dp->irq_trans->data = (void *) (unsigned long) regs->phys_addr;
 943 }
 944 #endif /* CONFIG_SBUS */
 945
 946
 947 static unsigned int central_build_irq(struct device_node *dp,
 948                                       unsigned int ino,
 949                                       void *_data)
 950 {
 951         struct device_node *central_dp = _data;
 952         struct of_device *central_op = of_find_device_by_node(central_dp);
 953         struct resource *res;
 954         unsigned long imap, iclr;
 955         u32 tmp;
 956
 957         if (!strcmp(dp->name, "eeprom")) {
 958                 res = &central_op->resource[5];
 959         } else if (!strcmp(dp->name, "zs")) {
 960                 res = &central_op->resource[4];
 961         } else if (!strcmp(dp->name, "clock-board")) {
 962                 res = &central_op->resource[3];
 963         } else {
 964                 return ino;
 965         }
 966
 967         imap = res->start + 0x00UL;
 968         iclr = res->start + 0x10UL;
 969
 970         /* Set the INO state to idle, and disable.  */
 971         upa_writel(0, iclr);
 972         upa_readl(iclr);
 973
 974         tmp = upa_readl(imap);
 975         tmp &= ~0x80000000;
 976         upa_writel(tmp, imap);
 977
 978         return build_irq(0, iclr, imap);
 979 }
 980
 981 static void central_irq_trans_init(struct device_node *dp)
 982 {
 983         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 984         dp->irq_trans->irq_build = central_build_irq;
 985
 986         dp->irq_trans->data = dp;
 987 }
 988
 989 struct irq_trans {
 990         const char *name;
 991         void (*init)(struct device_node *);
 992 };
 993
 994 #ifdef CONFIG_PCI
 995 static struct irq_trans pci_irq_trans_table[] = {
 996         { "SUNW,sabre", sabre_irq_trans_init },
 997         { "pci108e,a000", sabre_irq_trans_init },
 998         { "pci108e,a001", sabre_irq_trans_init },
 999         { "SUNW,psycho", psycho_irq_trans_init },
1000         { "pci108e,8000", psycho_irq_trans_init },
1001         { "SUNW,schizo", schizo_irq_trans_init },
1002         { "pci108e,8001", schizo_irq_trans_init },
1003         { "SUNW,schizo+", schizo_irq_trans_init },
1004         { "pci108e,8002", schizo_irq_trans_init },
1005         { "SUNW,tomatillo", schizo_irq_trans_init },
1006         { "pci108e,a801", schizo_irq_trans_init },
1007         { "SUNW,sun4v-pci", pci_sun4v_irq_trans_init },
1008 };
1009 #endif
1010
1011 static unsigned int sun4v_vdev_irq_build(struct device_node *dp,
1012                                          unsigned int devino,
1013                                          void *_data)
1014 {
1015         u32 devhandle = (u32) (unsigned long) _data;
1016
1017         return sun4v_build_irq(devhandle, devino);
1018 }
1019
1020 static void sun4v_vdev_irq_trans_init(struct device_node *dp)
1021 {
1022         struct linux_prom64_registers *regs;
1023
1024         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
1025         dp->irq_trans->irq_build = sun4v_vdev_irq_build;
1026
1027         regs = of_get_property(dp, "reg", NULL);
1028         dp->irq_trans->data = (void *) (unsigned long)
1029                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
1030 }
1031
1032 static void irq_trans_init(struct device_node *dp)
1033 {
1034         const char *model;
1035 #ifdef CONFIG_PCI
1036         int i;
1037 #endif
1038
1039         model = of_get_property(dp, "model", NULL);
1040         if (!model)
1041                 model = of_get_property(dp, "compatible", NULL);
1042         if (!model)
1043                 return;
1044
1045 #ifdef CONFIG_PCI
1046         for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
1047                 struct irq_trans *t = &pci_irq_trans_table[i];
1048
1049                 if (!strcmp(model, t->name))
1050                         return t->init(dp);
1051         }
1052 #endif
1053 #ifdef CONFIG_SBUS
1054         if (!strcmp(dp->name, "sbus") ||
1055             !strcmp(dp->name, "sbi"))
1056                 return sbus_irq_trans_init(dp);
1057 #endif
1058         if (!strcmp(dp->name, "central"))
1059                 return central_irq_trans_init(dp->child);
1060         if (!strcmp(dp->name, "virtual-devices"))
1061                 return sun4v_vdev_irq_trans_init(dp);
1062 }
1063
1064 static int is_root_node(const struct device_node *dp)
1065 {
1066         if (!dp)
1067                 return 0;
1068
1069         return (dp->parent == NULL);
1070 }
1071
1072 /* The following routines deal with the black magic of fully naming a
1073  * node.
1074  *
1075  * Certain well known named nodes are just the simple name string.
1076  *
1077  * Actual devices have an address specifier appended to the base name
1078  * string, like this "foo@addr".  The "addr" can be in any number of
1079  * formats, and the platform plus the type of the node determine the
1080  * format and how it is constructed.
1081  *
1082  * For children of the ROOT node, the naming convention is fixed and
1083  * determined by whether this is a sun4u or sun4v system.
1084  *
1085  * For children of other nodes, it is bus type specific.  So
1086  * we walk up the tree until we discover a "device_type" property
1087  * we recognize and we go from there.
1088  *
1089  * As an example, the boot device on my workstation has a full path:
1090  *
1091  *      /pci@1e,600000/ide@d/disk@0,0:c
1092  */
1093 static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
1094 {
1095         struct linux_prom64_registers *regs;
1096         struct property *rprop;
1097         u32 high_bits, low_bits, type;
1098
1099         rprop = of_find_property(dp, "reg", NULL);
1100         if (!rprop)
1101                 return;
1102
1103         regs = rprop->value;
1104         if (!is_root_node(dp->parent)) {
1105                 sprintf(tmp_buf, "%s@%x,%x",
1106                         dp->name,
1107                         (unsigned int) (regs->phys_addr >> 32UL),
1108                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1109                 return;
1110         }
1111
1112         type = regs->phys_addr >> 60UL;
1113         high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
1114         low_bits = (regs->phys_addr & 0xffffffffUL);
1115
1116         if (type == 0 || type == 8) {
1117                 const char *prefix = (type == 0) ? "m" : "i";
1118
1119                 if (low_bits)
1120                         sprintf(tmp_buf, "%s@%s%x,%x",
1121                                 dp->name, prefix,
1122                                 high_bits, low_bits);
1123                 else
1124                         sprintf(tmp_buf, "%s@%s%x",
1125                                 dp->name,
1126                                 prefix,
1127                                 high_bits);
1128         } else if (type == 12) {
1129                 sprintf(tmp_buf, "%s@%x",
1130                         dp->name, high_bits);
1131         }
1132 }
1133
1134 static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
1135 {
1136         struct linux_prom64_registers *regs;
1137         struct property *prop;
1138
1139         prop = of_find_property(dp, "reg", NULL);
1140         if (!prop)
1141                 return;
1142
1143         regs = prop->value;
1144         if (!is_root_node(dp->parent)) {
1145                 sprintf(tmp_buf, "%s@%x,%x",
1146                         dp->name,
1147                         (unsigned int) (regs->phys_addr >> 32UL),
1148                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1149                 return;
1150         }
1151
1152         prop = of_find_property(dp, "upa-portid", NULL);
1153         if (!prop)
1154                 prop = of_find_property(dp, "portid", NULL);
1155         if (prop) {
1156                 unsigned long mask = 0xffffffffUL;
1157
1158                 if (tlb_type >= cheetah)
1159                         mask = 0x7fffff;
1160
1161                 sprintf(tmp_buf, "%s@%x,%x",
1162                         dp->name,
1163                         *(u32 *)prop->value,
1164                         (unsigned int) (regs->phys_addr & mask));
1165         }
1166 }
1167
1168 /* "name@slot,offset"  */
1169 static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
1170 {
1171         struct linux_prom_registers *regs;
1172         struct property *prop;
1173
1174         prop = of_find_property(dp, "reg", NULL);
1175         if (!prop)
1176                 return;
1177
1178         regs = prop->value;
1179         sprintf(tmp_buf, "%s@%x,%x",
1180                 dp->name,
1181                 regs->which_io,
1182                 regs->phys_addr);
1183 }
1184
1185 /* "name@devnum[,func]" */
1186 static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
1187 {
1188         struct linux_prom_pci_registers *regs;
1189         struct property *prop;
1190         unsigned int devfn;
1191
1192         prop = of_find_property(dp, "reg", NULL);
1193         if (!prop)
1194                 return;
1195
1196         regs = prop->value;
1197         devfn = (regs->phys_hi >> 8) & 0xff;
1198         if (devfn & 0x07) {
1199                 sprintf(tmp_buf, "%s@%x,%x",
1200                         dp->name,
1201                         devfn >> 3,
1202                         devfn & 0x07);
1203         } else {
1204                 sprintf(tmp_buf, "%s@%x",
1205                         dp->name,
1206                         devfn >> 3);
1207         }
1208 }
1209
1210 /* "name@UPA_PORTID,offset" */
1211 static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
1212 {
1213         struct linux_prom64_registers *regs;
1214         struct property *prop;
1215
1216         prop = of_find_property(dp, "reg", NULL);
1217         if (!prop)
1218                 return;
1219
1220         regs = prop->value;
1221
1222         prop = of_find_property(dp, "upa-portid", NULL);
1223         if (!prop)
1224                 return;
1225
1226         sprintf(tmp_buf, "%s@%x,%x",
1227                 dp->name,
1228                 *(u32 *) prop->value,
1229                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1230 }
1231
1232 /* "name@reg" */
1233 static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
1234 {
1235         struct property *prop;
1236         u32 *regs;
1237
1238         prop = of_find_property(dp, "reg", NULL);
1239         if (!prop)
1240                 return;
1241
1242         regs = prop->value;
1243
1244         sprintf(tmp_buf, "%s@%x", dp->name, *regs);
1245 }
1246
1247 /* "name@addrhi,addrlo" */
1248 static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
1249 {
1250         struct linux_prom64_registers *regs;
1251         struct property *prop;
1252
1253         prop = of_find_property(dp, "reg", NULL);
1254         if (!prop)
1255                 return;
1256
1257         regs = prop->value;
1258
1259         sprintf(tmp_buf, "%s@%x,%x",
1260                 dp->name,
1261                 (unsigned int) (regs->phys_addr >> 32UL),
1262                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1263 }
1264
1265 /* "name@bus,addr" */
1266 static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
1267 {
1268         struct property *prop;
1269         u32 *regs;
1270
1271         prop = of_find_property(dp, "reg", NULL);
1272         if (!prop)
1273                 return;
1274
1275         regs = prop->value;
1276
1277         /* This actually isn't right... should look at the #address-cells
1278          * property of the i2c bus node etc. etc.
1279          */
1280         sprintf(tmp_buf, "%s@%x,%x",
1281                 dp->name, regs[0], regs[1]);
1282 }
1283
1284 /* "name@reg0[,reg1]" */
1285 static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
1286 {
1287         struct property *prop;
1288         u32 *regs;
1289
1290         prop = of_find_property(dp, "reg", NULL);
1291         if (!prop)
1292                 return;
1293
1294         regs = prop->value;
1295
1296         if (prop->length == sizeof(u32) || regs[1] == 1) {
1297                 sprintf(tmp_buf, "%s@%x",
1298                         dp->name, regs[0]);
1299         } else {
1300                 sprintf(tmp_buf, "%s@%x,%x",
1301                         dp->name, regs[0], regs[1]);
1302         }
1303 }
1304
1305 /* "name@reg0reg1[,reg2reg3]" */
1306 static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
1307 {
1308         struct property *prop;
1309         u32 *regs;
1310
1311         prop = of_find_property(dp, "reg", NULL);
1312         if (!prop)
1313                 return;
1314
1315         regs = prop->value;
1316
1317         if (regs[2] || regs[3]) {
1318                 sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
1319                         dp->name, regs[0], regs[1], regs[2], regs[3]);
1320         } else {
1321                 sprintf(tmp_buf, "%s@%08x%08x",
1322                         dp->name, regs[0], regs[1]);
1323         }
1324 }
1325
1326 static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
1327 {
1328         struct device_node *parent = dp->parent;
1329
1330         if (parent != NULL) {
1331                 if (!strcmp(parent->type, "pci") ||
1332                     !strcmp(parent->type, "pciex"))
1333                         return pci_path_component(dp, tmp_buf);
1334                 if (!strcmp(parent->type, "sbus"))
1335                         return sbus_path_component(dp, tmp_buf);
1336                 if (!strcmp(parent->type, "upa"))
1337                         return upa_path_component(dp, tmp_buf);
1338                 if (!strcmp(parent->type, "ebus"))
1339                         return ebus_path_component(dp, tmp_buf);
1340                 if (!strcmp(parent->name, "usb") ||
1341                     !strcmp(parent->name, "hub"))
1342                         return usb_path_component(dp, tmp_buf);
1343                 if (!strcmp(parent->type, "i2c"))
1344                         return i2c_path_component(dp, tmp_buf);
1345                 if (!strcmp(parent->type, "firewire"))
1346                         return ieee1394_path_component(dp, tmp_buf);
1347                 if (!strcmp(parent->type, "virtual-devices"))
1348                         return vdev_path_component(dp, tmp_buf);
1349
1350                 /* "isa" is handled with platform naming */
1351         }
1352
1353         /* Use platform naming convention.  */
1354         if (tlb_type == hypervisor)
1355                 return sun4v_path_component(dp, tmp_buf);
1356         else
1357                 return sun4u_path_component(dp, tmp_buf);
1358 }
1359
1360 static char * __init build_path_component(struct device_node *dp)
1361 {
1362         char tmp_buf[64], *n;
1363
1364         tmp_buf[0] = '\0';
1365         __build_path_component(dp, tmp_buf);
1366         if (tmp_buf[0] == '\0')
1367                 strcpy(tmp_buf, dp->name);
1368
1369         n = prom_early_alloc(strlen(tmp_buf) + 1);
1370         strcpy(n, tmp_buf);
1371
1372         return n;
1373 }
1374
1375 static char * __init build_full_name(struct device_node *dp)
1376 {
1377         int len, ourlen, plen;
1378         char *n;
1379
1380         plen = strlen(dp->parent->full_name);
1381         ourlen = strlen(dp->path_component_name);
1382         len = ourlen + plen + 2;
1383
1384         n = prom_early_alloc(len);
1385         strcpy(n, dp->parent->full_name);
1386         if (!is_root_node(dp->parent)) {
1387                 strcpy(n + plen, "/");
1388                 plen++;
1389         }
1390         strcpy(n + plen, dp->path_component_name);
1391
1392         return n;
1393 }
1394
1395 static unsigned int unique_id;
1396
1397 static struct property * __init build_one_prop(phandle node, char *prev, char *special_name, void *special_val, int special_len)
1398 {
1399         static struct property *tmp = NULL;
1400         struct property *p;
1401
1402         if (tmp) {
1403                 p = tmp;
1404                 memset(p, 0, sizeof(*p) + 32);
1405                 tmp = NULL;
1406         } else {
1407                 p = prom_early_alloc(sizeof(struct property) + 32);
1408                 p->unique_id = unique_id++;
1409         }
1410
1411         p->name = (char *) (p + 1);
1412         if (special_name) {
1413                 strcpy(p->name, special_name);
1414                 p->length = special_len;
1415                 p->value = prom_early_alloc(special_len);
1416                 memcpy(p->value, special_val, special_len);
1417         } else {
1418                 if (prev == NULL) {
1419                         prom_firstprop(node, p->name);
1420                 } else {
1421                         prom_nextprop(node, prev, p->name);
1422                 }
1423                 if (strlen(p->name) == 0) {
1424                         tmp = p;
1425                         return NULL;
1426                 }
1427                 p->length = prom_getproplen(node, p->name);
1428                 if (p->length <= 0) {
1429                         p->length = 0;
1430                 } else {
1431                         p->value = prom_early_alloc(p->length + 1);
1432                         prom_getproperty(node, p->name, p->value, p->length);
1433                         ((unsigned char *)p->value)[p->length] = '\0';
1434                 }
1435         }
1436         return p;
1437 }
1438
1439 static struct property * __init build_prop_list(phandle node)
1440 {
1441         struct property *head, *tail;
1442
1443         head = tail = build_one_prop(node, NULL,
1444                                      ".node", &node, sizeof(node));
1445
1446         tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
1447         tail = tail->next;
1448         while(tail) {
1449                 tail->next = build_one_prop(node, tail->name,
1450                                             NULL, NULL, 0);
1451                 tail = tail->next;
1452         }
1453
1454         return head;
1455 }
1456
1457 static char * __init get_one_property(phandle node, const char *name)
1458 {
1459         char *buf = "<NULL>";
1460         int len;
1461
1462         len = prom_getproplen(node, name);
1463         if (len > 0) {
1464                 buf = prom_early_alloc(len);
1465                 prom_getproperty(node, name, buf, len);
1466         }
1467
1468         return buf;
1469 }
1470
1471 static struct device_node * __init create_node(phandle node)
1472 {
1473         struct device_node *dp;
1474
1475         if (!node)
1476                 return NULL;
1477
1478         dp = prom_early_alloc(sizeof(*dp));
1479         dp->unique_id = unique_id++;
1480
1481         kref_init(&dp->kref);
1482
1483         dp->name = get_one_property(node, "name");
1484         dp->type = get_one_property(node, "device_type");
1485         dp->node = node;
1486
1487         dp->properties = build_prop_list(node);
1488
1489         irq_trans_init(dp);
1490
1491         return dp;
1492 }
1493
1494 static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
1495 {
1496         struct device_node *dp;
1497
1498         dp = create_node(node);
1499         if (dp) {
1500                 *(*nextp) = dp;
1501                 *nextp = &dp->allnext;
1502
1503                 dp->parent = parent;
1504                 dp->path_component_name = build_path_component(dp);
1505                 dp->full_name = build_full_name(dp);
1506
1507                 dp->child = build_tree(dp, prom_getchild(node), nextp);
1508
1509                 dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
1510         }
1511
1512         return dp;
1513 }
1514
1515 void __init prom_build_devicetree(void)
1516 {
1517         struct device_node **nextp;
1518
1519         allnodes = create_node(prom_root_node);
1520         allnodes->path_component_name = "";
1521         allnodes->full_name = "/";
1522
1523         nextp = &allnodes->allnext;
1524         allnodes->child = build_tree(allnodes,
1525                                      prom_getchild(allnodes->node),
1526                                      &nextp);
1527         printk("PROM: Built device tree with %u bytes of memory.\n",
1528                prom_early_allocated);
1529 }