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 /*0x33*/        PSYCHO_IMAP_GFX,
 349 /*0x34*/        PSYCHO_IMAP_EUPA,
 350 };
 351 #define PSYCHO_ONBOARD_IRQ_BASE         0x20
 352 #define PSYCHO_ONBOARD_IRQ_LAST         0x34
 353 #define psycho_onboard_imap_offset(__ino) \
 354         __psycho_onboard_imap_off[(__ino) - PSYCHO_ONBOARD_IRQ_BASE]
 355
 356 #define PSYCHO_ICLR_A_SLOT0     0x1400UL
 357 #define PSYCHO_ICLR_SCSI        0x1800UL
 358
 359 #define psycho_iclr_offset(ino)                                       \
 360         ((ino & 0x20) ? (PSYCHO_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
 361                         (PSYCHO_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
 362
 363 static unsigned int psycho_irq_build(struct device_node *dp,
 364                                      unsigned int ino,
 365                                      void *_data)
 366 {
 367         unsigned long controller_regs = (unsigned long) _data;
 368         unsigned long imap, iclr;
 369         unsigned long imap_off, iclr_off;
 370         int inofixup = 0;
 371
 372         ino &= 0x3f;
 373         if (ino < PSYCHO_ONBOARD_IRQ_BASE) {
 374                 /* PCI slot */
 375                 imap_off = psycho_pcislot_imap_offset(ino);
 376         } else {
 377                 /* Onboard device */
 378                 if (ino > PSYCHO_ONBOARD_IRQ_LAST) {
 379                         prom_printf("psycho_irq_build: Wacky INO [%x]\n", ino);
 380                         prom_halt();
 381                 }
 382                 imap_off = psycho_onboard_imap_offset(ino);
 383         }
 384
 385         /* Now build the IRQ bucket. */
 386         imap = controller_regs + imap_off;
 387         imap += 4;
 388
 389         iclr_off = psycho_iclr_offset(ino);
 390         iclr = controller_regs + iclr_off;
 391         iclr += 4;
 392
 393         if ((ino & 0x20) == 0)
 394                 inofixup = ino & 0x03;
 395
 396         return build_irq(inofixup, iclr, imap);
 397 }
 398
 399 static void psycho_irq_trans_init(struct device_node *dp)
 400 {
 401         struct linux_prom64_registers *regs;
 402
 403         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 404         dp->irq_trans->irq_build = psycho_irq_build;
 405
 406         regs = of_get_property(dp, "reg", NULL);
 407         dp->irq_trans->data = (void *) regs[2].phys_addr;
 408 }
 409
 410 #define sabre_read(__reg) \
 411 ({      u64 __ret; \
 412         __asm__ __volatile__("ldxa [%1] %2, %0" \
 413                              : "=r" (__ret) \
 414                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
 415                              : "memory"); \
 416         __ret; \
 417 })
 418
 419 struct sabre_irq_data {
 420         unsigned long controller_regs;
 421         unsigned int pci_first_busno;
 422 };
 423 #define SABRE_CONFIGSPACE       0x001000000UL
 424 #define SABRE_WRSYNC            0x1c20UL
 425
 426 #define SABRE_CONFIG_BASE(CONFIG_SPACE) \
 427         (CONFIG_SPACE | (1UL << 24))
 428 #define SABRE_CONFIG_ENCODE(BUS, DEVFN, REG)    \
 429         (((unsigned long)(BUS)   << 16) |       \
 430          ((unsigned long)(DEVFN) << 8)  |       \
 431          ((unsigned long)(REG)))
 432
 433 /* When a device lives behind a bridge deeper in the PCI bus topology
 434  * than APB, a special sequence must run to make sure all pending DMA
 435  * transfers at the time of IRQ delivery are visible in the coherency
 436  * domain by the cpu.  This sequence is to perform a read on the far
 437  * side of the non-APB bridge, then perform a read of Sabre's DMA
 438  * write-sync register.
 439  */
 440 static void sabre_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 441 {
 442         unsigned int phys_hi = (unsigned int) (unsigned long) _arg1;
 443         struct sabre_irq_data *irq_data = _arg2;
 444         unsigned long controller_regs = irq_data->controller_regs;
 445         unsigned long sync_reg = controller_regs + SABRE_WRSYNC;
 446         unsigned long config_space = controller_regs + SABRE_CONFIGSPACE;
 447         unsigned int bus, devfn;
 448         u16 _unused;
 449
 450         config_space = SABRE_CONFIG_BASE(config_space);
 451
 452         bus = (phys_hi >> 16) & 0xff;
 453         devfn = (phys_hi >> 8) & 0xff;
 454
 455         config_space |= SABRE_CONFIG_ENCODE(bus, devfn, 0x00);
 456
 457         __asm__ __volatile__("membar #Sync\n\t"
 458                              "lduha [%1] %2, %0\n\t"
 459                              "membar #Sync"
 460                              : "=r" (_unused)
 461                              : "r" ((u16 *) config_space),
 462                                "i" (ASI_PHYS_BYPASS_EC_E_L)
 463                              : "memory");
 464
 465         sabre_read(sync_reg);
 466 }
 467
 468 #define SABRE_IMAP_A_SLOT0      0x0c00UL
 469 #define SABRE_IMAP_B_SLOT0      0x0c20UL
 470 #define SABRE_IMAP_SCSI         0x1000UL
 471 #define SABRE_IMAP_ETH          0x1008UL
 472 #define SABRE_IMAP_BPP          0x1010UL
 473 #define SABRE_IMAP_AU_REC       0x1018UL
 474 #define SABRE_IMAP_AU_PLAY      0x1020UL
 475 #define SABRE_IMAP_PFAIL        0x1028UL
 476 #define SABRE_IMAP_KMS          0x1030UL
 477 #define SABRE_IMAP_FLPY         0x1038UL
 478 #define SABRE_IMAP_SHW          0x1040UL
 479 #define SABRE_IMAP_KBD          0x1048UL
 480 #define SABRE_IMAP_MS           0x1050UL
 481 #define SABRE_IMAP_SER          0x1058UL
 482 #define SABRE_IMAP_UE           0x1070UL
 483 #define SABRE_IMAP_CE           0x1078UL
 484 #define SABRE_IMAP_PCIERR       0x1080UL
 485 #define SABRE_IMAP_GFX          0x1098UL
 486 #define SABRE_IMAP_EUPA         0x10a0UL
 487 #define SABRE_ICLR_A_SLOT0      0x1400UL
 488 #define SABRE_ICLR_B_SLOT0      0x1480UL
 489 #define SABRE_ICLR_SCSI         0x1800UL
 490 #define SABRE_ICLR_ETH          0x1808UL
 491 #define SABRE_ICLR_BPP          0x1810UL
 492 #define SABRE_ICLR_AU_REC       0x1818UL
 493 #define SABRE_ICLR_AU_PLAY      0x1820UL
 494 #define SABRE_ICLR_PFAIL        0x1828UL
 495 #define SABRE_ICLR_KMS          0x1830UL
 496 #define SABRE_ICLR_FLPY         0x1838UL
 497 #define SABRE_ICLR_SHW          0x1840UL
 498 #define SABRE_ICLR_KBD          0x1848UL
 499 #define SABRE_ICLR_MS           0x1850UL
 500 #define SABRE_ICLR_SER          0x1858UL
 501 #define SABRE_ICLR_UE           0x1870UL
 502 #define SABRE_ICLR_CE           0x1878UL
 503 #define SABRE_ICLR_PCIERR       0x1880UL
 504
 505 static unsigned long sabre_pcislot_imap_offset(unsigned long ino)
 506 {
 507         unsigned int bus =  (ino & 0x10) >> 4;
 508         unsigned int slot = (ino & 0x0c) >> 2;
 509
 510         if (bus == 0)
 511                 return SABRE_IMAP_A_SLOT0 + (slot * 8);
 512         else
 513                 return SABRE_IMAP_B_SLOT0 + (slot * 8);
 514 }
 515
 516 static unsigned long __sabre_onboard_imap_off[] = {
 517 /*0x20*/        SABRE_IMAP_SCSI,
 518 /*0x21*/        SABRE_IMAP_ETH,
 519 /*0x22*/        SABRE_IMAP_BPP,
 520 /*0x23*/        SABRE_IMAP_AU_REC,
 521 /*0x24*/        SABRE_IMAP_AU_PLAY,
 522 /*0x25*/        SABRE_IMAP_PFAIL,
 523 /*0x26*/        SABRE_IMAP_KMS,
 524 /*0x27*/        SABRE_IMAP_FLPY,
 525 /*0x28*/        SABRE_IMAP_SHW,
 526 /*0x29*/        SABRE_IMAP_KBD,
 527 /*0x2a*/        SABRE_IMAP_MS,
 528 /*0x2b*/        SABRE_IMAP_SER,
 529 /*0x2c*/        0 /* reserved */,
 530 /*0x2d*/        0 /* reserved */,
 531 /*0x2e*/        SABRE_IMAP_UE,
 532 /*0x2f*/        SABRE_IMAP_CE,
 533 /*0x30*/        SABRE_IMAP_PCIERR,
 534 /*0x31*/        0 /* reserved */,
 535 /*0x32*/        0 /* reserved */,
 536 /*0x33*/        SABRE_IMAP_GFX,
 537 /*0x34*/        SABRE_IMAP_EUPA,
 538 };
 539 #define SABRE_ONBOARD_IRQ_BASE          0x20
 540 #define SABRE_ONBOARD_IRQ_LAST          0x30
 541 #define sabre_onboard_imap_offset(__ino) \
 542         __sabre_onboard_imap_off[(__ino) - SABRE_ONBOARD_IRQ_BASE]
 543
 544 #define sabre_iclr_offset(ino)                                        \
 545         ((ino & 0x20) ? (SABRE_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
 546                         (SABRE_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
 547
 548 static int sabre_device_needs_wsync(struct device_node *dp)
 549 {
 550         struct device_node *parent = dp->parent;
 551         char *parent_model, *parent_compat;
 552
 553         /* This traversal up towards the root is meant to
 554          * handle two cases:
 555          *
 556          * 1) non-PCI bus sitting under PCI, such as 'ebus'
 557          * 2) the PCI controller interrupts themselves, which
 558          *    will use the sabre_irq_build but do not need
 559          *    the DMA synchronization handling
 560          */
 561         while (parent) {
 562                 if (!strcmp(parent->type, "pci"))
 563                         break;
 564                 parent = parent->parent;
 565         }
 566
 567         if (!parent)
 568                 return 0;
 569
 570         parent_model = of_get_property(parent,
 571                                        "model", NULL);
 572         if (parent_model &&
 573             (!strcmp(parent_model, "SUNW,sabre") ||
 574              !strcmp(parent_model, "SUNW,simba")))
 575                 return 0;
 576
 577         parent_compat = of_get_property(parent,
 578                                         "compatible", NULL);
 579         if (parent_compat &&
 580             (!strcmp(parent_compat, "pci108e,a000") ||
 581              !strcmp(parent_compat, "pci108e,a001")))
 582                 return 0;
 583
 584         return 1;
 585 }
 586
 587 static unsigned int sabre_irq_build(struct device_node *dp,
 588                                     unsigned int ino,
 589                                     void *_data)
 590 {
 591         struct sabre_irq_data *irq_data = _data;
 592         unsigned long controller_regs = irq_data->controller_regs;
 593         struct linux_prom_pci_registers *regs;
 594         unsigned long imap, iclr;
 595         unsigned long imap_off, iclr_off;
 596         int inofixup = 0;
 597         int virt_irq;
 598
 599         ino &= 0x3f;
 600         if (ino < SABRE_ONBOARD_IRQ_BASE) {
 601                 /* PCI slot */
 602                 imap_off = sabre_pcislot_imap_offset(ino);
 603         } else {
 604                 /* onboard device */
 605                 if (ino > SABRE_ONBOARD_IRQ_LAST) {
 606                         prom_printf("sabre_irq_build: Wacky INO [%x]\n", ino);
 607                         prom_halt();
 608                 }
 609                 imap_off = sabre_onboard_imap_offset(ino);
 610         }
 611
 612         /* Now build the IRQ bucket. */
 613         imap = controller_regs + imap_off;
 614         imap += 4;
 615
 616         iclr_off = sabre_iclr_offset(ino);
 617         iclr = controller_regs + iclr_off;
 618         iclr += 4;
 619
 620         if ((ino & 0x20) == 0)
 621                 inofixup = ino & 0x03;
 622
 623         virt_irq = build_irq(inofixup, iclr, imap);
 624
 625         /* If the parent device is a PCI<->PCI bridge other than
 626          * APB, we have to install a pre-handler to ensure that
 627          * all pending DMA is drained before the interrupt handler
 628          * is run.
 629          */
 630         regs = of_get_property(dp, "reg", NULL);
 631         if (regs && sabre_device_needs_wsync(dp)) {
 632                 irq_install_pre_handler(virt_irq,
 633                                         sabre_wsync_handler,
 634                                         (void *) (long) regs->phys_hi,
 635                                         (void *) irq_data);
 636         }
 637
 638         return virt_irq;
 639 }
 640
 641 static void sabre_irq_trans_init(struct device_node *dp)
 642 {
 643         struct linux_prom64_registers *regs;
 644         struct sabre_irq_data *irq_data;
 645         u32 *busrange;
 646
 647         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 648         dp->irq_trans->irq_build = sabre_irq_build;
 649
 650         irq_data = prom_early_alloc(sizeof(struct sabre_irq_data));
 651
 652         regs = of_get_property(dp, "reg", NULL);
 653         irq_data->controller_regs = regs[0].phys_addr;
 654
 655         busrange = of_get_property(dp, "bus-range", NULL);
 656         irq_data->pci_first_busno = busrange[0];
 657
 658         dp->irq_trans->data = irq_data;
 659 }
 660
 661 /* SCHIZO interrupt mapping support.  Unlike Psycho, for this controller the
 662  * imap/iclr registers are per-PBM.
 663  */
 664 #define SCHIZO_IMAP_BASE        0x1000UL
 665 #define SCHIZO_ICLR_BASE        0x1400UL
 666
 667 static unsigned long schizo_imap_offset(unsigned long ino)
 668 {
 669         return SCHIZO_IMAP_BASE + (ino * 8UL);
 670 }
 671
 672 static unsigned long schizo_iclr_offset(unsigned long ino)
 673 {
 674         return SCHIZO_ICLR_BASE + (ino * 8UL);
 675 }
 676
 677 static unsigned long schizo_ino_to_iclr(unsigned long pbm_regs,
 678                                         unsigned int ino)
 679 {
 680         return pbm_regs + schizo_iclr_offset(ino) + 4;
 681 }
 682
 683 static unsigned long schizo_ino_to_imap(unsigned long pbm_regs,
 684                                         unsigned int ino)
 685 {
 686         return pbm_regs + schizo_imap_offset(ino) + 4;
 687 }
 688
 689 #define schizo_read(__reg) \
 690 ({      u64 __ret; \
 691         __asm__ __volatile__("ldxa [%1] %2, %0" \
 692                              : "=r" (__ret) \
 693                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
 694                              : "memory"); \
 695         __ret; \
 696 })
 697 #define schizo_write(__reg, __val) \
 698         __asm__ __volatile__("stxa %0, [%1] %2" \
 699                              : /* no outputs */ \
 700                              : "r" (__val), "r" (__reg), \
 701                                "i" (ASI_PHYS_BYPASS_EC_E) \
 702                              : "memory")
 703
 704 static void tomatillo_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 705 {
 706         unsigned long sync_reg = (unsigned long) _arg2;
 707         u64 mask = 1UL << (ino & IMAP_INO);
 708         u64 val;
 709         int limit;
 710
 711         schizo_write(sync_reg, mask);
 712
 713         limit = 100000;
 714         val = 0;
 715         while (--limit) {
 716                 val = schizo_read(sync_reg);
 717                 if (!(val & mask))
 718                         break;
 719         }
 720         if (limit <= 0) {
 721                 printk("tomatillo_wsync_handler: DMA won't sync [%lx:%lx]\n",
 722                        val, mask);
 723         }
 724
 725         if (_arg1) {
 726                 static unsigned char cacheline[64]
 727                         __attribute__ ((aligned (64)));
 728
 729                 __asm__ __volatile__("rd %%fprs, %0\n\t"
 730                                      "or %0, %4, %1\n\t"
 731                                      "wr %1, 0x0, %%fprs\n\t"
 732                                      "stda %%f0, [%5] %6\n\t"
 733                                      "wr %0, 0x0, %%fprs\n\t"
 734                                      "membar #Sync"
 735                                      : "=&r" (mask), "=&r" (val)
 736                                      : "0" (mask), "1" (val),
 737                                      "i" (FPRS_FEF), "r" (&cacheline[0]),
 738                                      "i" (ASI_BLK_COMMIT_P));
 739         }
 740 }
 741
 742 struct schizo_irq_data {
 743         unsigned long pbm_regs;
 744         unsigned long sync_reg;
 745         u32 portid;
 746         int chip_version;
 747 };
 748
 749 static unsigned int schizo_irq_build(struct device_node *dp,
 750                                      unsigned int ino,
 751                                      void *_data)
 752 {
 753         struct schizo_irq_data *irq_data = _data;
 754         unsigned long pbm_regs = irq_data->pbm_regs;
 755         unsigned long imap, iclr;
 756         int ign_fixup;
 757         int virt_irq;
 758         int is_tomatillo;
 759
 760         ino &= 0x3f;
 761
 762         /* Now build the IRQ bucket. */
 763         imap = schizo_ino_to_imap(pbm_regs, ino);
 764         iclr = schizo_ino_to_iclr(pbm_regs, ino);
 765
 766         /* On Schizo, no inofixup occurs.  This is because each
 767          * INO has it's own IMAP register.  On Psycho and Sabre
 768          * there is only one IMAP register for each PCI slot even
 769          * though four different INOs can be generated by each
 770          * PCI slot.
 771          *
 772          * But, for JBUS variants (essentially, Tomatillo), we have
 773          * to fixup the lowest bit of the interrupt group number.
 774          */
 775         ign_fixup = 0;
 776
 777         is_tomatillo = (irq_data->sync_reg != 0UL);
 778
 779         if (is_tomatillo) {
 780                 if (irq_data->portid & 1)
 781                         ign_fixup = (1 << 6);
 782         }
 783
 784         virt_irq = build_irq(ign_fixup, iclr, imap);
 785
 786         if (is_tomatillo) {
 787                 irq_install_pre_handler(virt_irq,
 788                                         tomatillo_wsync_handler,
 789                                         ((irq_data->chip_version <= 4) ?
 790                                          (void *) 1 : (void *) 0),
 791                                         (void *) irq_data->sync_reg);
 792         }
 793
 794         return virt_irq;
 795 }
 796
 797 static void schizo_irq_trans_init(struct device_node *dp)
 798 {
 799         struct linux_prom64_registers *regs;
 800         struct schizo_irq_data *irq_data;
 801
 802         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 803         dp->irq_trans->irq_build = schizo_irq_build;
 804
 805         irq_data = prom_early_alloc(sizeof(struct schizo_irq_data));
 806
 807         regs = of_get_property(dp, "reg", NULL);
 808         dp->irq_trans->data = irq_data;
 809
 810         irq_data->pbm_regs = regs[0].phys_addr;
 811         irq_data->sync_reg = regs[3].phys_addr + 0x1a18UL;
 812         irq_data->portid = of_getintprop_default(dp, "portid", 0);
 813         irq_data->chip_version = of_getintprop_default(dp, "version#", 0);
 814 }
 815
 816 static unsigned int pci_sun4v_irq_build(struct device_node *dp,
 817                                         unsigned int devino,
 818                                         void *_data)
 819 {
 820         u32 devhandle = (u32) (unsigned long) _data;
 821
 822         return sun4v_build_irq(devhandle, devino);
 823 }
 824
 825 static void pci_sun4v_irq_trans_init(struct device_node *dp)
 826 {
 827         struct linux_prom64_registers *regs;
 828
 829         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 830         dp->irq_trans->irq_build = pci_sun4v_irq_build;
 831
 832         regs = of_get_property(dp, "reg", NULL);
 833         dp->irq_trans->data = (void *) (unsigned long)
 834                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
 835 }
 836 #endif /* CONFIG_PCI */
 837
 838 #ifdef CONFIG_SBUS
 839 /* INO number to IMAP register offset for SYSIO external IRQ's.
 840  * This should conform to both Sunfire/Wildfire server and Fusion
 841  * desktop designs.
 842  */
 843 #define SYSIO_IMAP_SLOT0        0x2c04UL
 844 #define SYSIO_IMAP_SLOT1        0x2c0cUL
 845 #define SYSIO_IMAP_SLOT2        0x2c14UL
 846 #define SYSIO_IMAP_SLOT3        0x2c1cUL
 847 #define SYSIO_IMAP_SCSI         0x3004UL
 848 #define SYSIO_IMAP_ETH          0x300cUL
 849 #define SYSIO_IMAP_BPP          0x3014UL
 850 #define SYSIO_IMAP_AUDIO        0x301cUL
 851 #define SYSIO_IMAP_PFAIL        0x3024UL
 852 #define SYSIO_IMAP_KMS          0x302cUL
 853 #define SYSIO_IMAP_FLPY         0x3034UL
 854 #define SYSIO_IMAP_SHW          0x303cUL
 855 #define SYSIO_IMAP_KBD          0x3044UL
 856 #define SYSIO_IMAP_MS           0x304cUL
 857 #define SYSIO_IMAP_SER          0x3054UL
 858 #define SYSIO_IMAP_TIM0         0x3064UL
 859 #define SYSIO_IMAP_TIM1         0x306cUL
 860 #define SYSIO_IMAP_UE           0x3074UL
 861 #define SYSIO_IMAP_CE           0x307cUL
 862 #define SYSIO_IMAP_SBERR        0x3084UL
 863 #define SYSIO_IMAP_PMGMT        0x308cUL
 864 #define SYSIO_IMAP_GFX          0x3094UL
 865 #define SYSIO_IMAP_EUPA         0x309cUL
 866
 867 #define bogon     ((unsigned long) -1)
 868 static unsigned long sysio_irq_offsets[] = {
 869         /* SBUS Slot 0 --> 3, level 1 --> 7 */
 870         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 871         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 872         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 873         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 874         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 875         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 876         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 877         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 878
 879         /* Onboard devices (not relevant/used on SunFire). */
 880         SYSIO_IMAP_SCSI,
 881         SYSIO_IMAP_ETH,
 882         SYSIO_IMAP_BPP,
 883         bogon,
 884         SYSIO_IMAP_AUDIO,
 885         SYSIO_IMAP_PFAIL,
 886         bogon,
 887         bogon,
 888         SYSIO_IMAP_KMS,
 889         SYSIO_IMAP_FLPY,
 890         SYSIO_IMAP_SHW,
 891         SYSIO_IMAP_KBD,
 892         SYSIO_IMAP_MS,
 893         SYSIO_IMAP_SER,
 894         bogon,
 895         bogon,
 896         SYSIO_IMAP_TIM0,
 897         SYSIO_IMAP_TIM1,
 898         bogon,
 899         bogon,
 900         SYSIO_IMAP_UE,
 901         SYSIO_IMAP_CE,
 902         SYSIO_IMAP_SBERR,
 903         SYSIO_IMAP_PMGMT,
 904         SYSIO_IMAP_GFX,
 905         SYSIO_IMAP_EUPA,
 906 };
 907
 908 #undef bogon
 909
 910 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
 911
 912 /* Convert Interrupt Mapping register pointer to associated
 913  * Interrupt Clear register pointer, SYSIO specific version.
 914  */
 915 #define SYSIO_ICLR_UNUSED0      0x3400UL
 916 #define SYSIO_ICLR_SLOT0        0x340cUL
 917 #define SYSIO_ICLR_SLOT1        0x344cUL
 918 #define SYSIO_ICLR_SLOT2        0x348cUL
 919 #define SYSIO_ICLR_SLOT3        0x34ccUL
 920 static unsigned long sysio_imap_to_iclr(unsigned long imap)
 921 {
 922         unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
 923         return imap + diff;
 924 }
 925
 926 static unsigned int sbus_of_build_irq(struct device_node *dp,
 927                                       unsigned int ino,
 928                                       void *_data)
 929 {
 930         unsigned long reg_base = (unsigned long) _data;
 931         struct linux_prom_registers *regs;
 932         unsigned long imap, iclr;
 933         int sbus_slot = 0;
 934         int sbus_level = 0;
 935
 936         ino &= 0x3f;
 937
 938         regs = of_get_property(dp, "reg", NULL);
 939         if (regs)
 940                 sbus_slot = regs->which_io;
 941
 942         if (ino < 0x20)
 943                 ino += (sbus_slot * 8);
 944
 945         imap = sysio_irq_offsets[ino];
 946         if (imap == ((unsigned long)-1)) {
 947                 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
 948                             ino);
 949                 prom_halt();
 950         }
 951         imap += reg_base;
 952
 953         /* SYSIO inconsistency.  For external SLOTS, we have to select
 954          * the right ICLR register based upon the lower SBUS irq level
 955          * bits.
 956          */
 957         if (ino >= 0x20) {
 958                 iclr = sysio_imap_to_iclr(imap);
 959         } else {
 960                 sbus_level = ino & 0x7;
 961
 962                 switch(sbus_slot) {
 963                 case 0:
 964                         iclr = reg_base + SYSIO_ICLR_SLOT0;
 965                         break;
 966                 case 1:
 967                         iclr = reg_base + SYSIO_ICLR_SLOT1;
 968                         break;
 969                 case 2:
 970                         iclr = reg_base + SYSIO_ICLR_SLOT2;
 971                         break;
 972                 default:
 973                 case 3:
 974                         iclr = reg_base + SYSIO_ICLR_SLOT3;
 975                         break;
 976                 };
 977
 978                 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
 979         }
 980         return build_irq(sbus_level, iclr, imap);
 981 }
 982
 983 static void sbus_irq_trans_init(struct device_node *dp)
 984 {
 985         struct linux_prom64_registers *regs;
 986
 987         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 988         dp->irq_trans->irq_build = sbus_of_build_irq;
 989
 990         regs = of_get_property(dp, "reg", NULL);
 991         dp->irq_trans->data = (void *) (unsigned long) regs->phys_addr;
 992 }
 993 #endif /* CONFIG_SBUS */
 994
 995
 996 static unsigned int central_build_irq(struct device_node *dp,
 997                                       unsigned int ino,
 998                                       void *_data)
 999 {
1000         struct device_node *central_dp = _data;
1001         struct of_device *central_op = of_find_device_by_node(central_dp);
1002         struct resource *res;
1003         unsigned long imap, iclr;
1004         u32 tmp;
1005
1006         if (!strcmp(dp->name, "eeprom")) {
1007                 res = &central_op->resource[5];
1008         } else if (!strcmp(dp->name, "zs")) {
1009                 res = &central_op->resource[4];
1010         } else if (!strcmp(dp->name, "clock-board")) {
1011                 res = &central_op->resource[3];
1012         } else {
1013                 return ino;
1014         }
1015
1016         imap = res->start + 0x00UL;
1017         iclr = res->start + 0x10UL;
1018
1019         /* Set the INO state to idle, and disable.  */
1020         upa_writel(0, iclr);
1021         upa_readl(iclr);
1022
1023         tmp = upa_readl(imap);
1024         tmp &= ~0x80000000;
1025         upa_writel(tmp, imap);
1026
1027         return build_irq(0, iclr, imap);
1028 }
1029
1030 static void central_irq_trans_init(struct device_node *dp)
1031 {
1032         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
1033         dp->irq_trans->irq_build = central_build_irq;
1034
1035         dp->irq_trans->data = dp;
1036 }
1037
1038 struct irq_trans {
1039         const char *name;
1040         void (*init)(struct device_node *);
1041 };
1042
1043 #ifdef CONFIG_PCI
1044 static struct irq_trans pci_irq_trans_table[] = {
1045         { "SUNW,sabre", sabre_irq_trans_init },
1046         { "pci108e,a000", sabre_irq_trans_init },
1047         { "pci108e,a001", sabre_irq_trans_init },
1048         { "SUNW,psycho", psycho_irq_trans_init },
1049         { "pci108e,8000", psycho_irq_trans_init },
1050         { "SUNW,schizo", schizo_irq_trans_init },
1051         { "pci108e,8001", schizo_irq_trans_init },
1052         { "SUNW,schizo+", schizo_irq_trans_init },
1053         { "pci108e,8002", schizo_irq_trans_init },
1054         { "SUNW,tomatillo", schizo_irq_trans_init },
1055         { "pci108e,a801", schizo_irq_trans_init },
1056         { "SUNW,sun4v-pci", pci_sun4v_irq_trans_init },
1057 };
1058 #endif
1059
1060 static unsigned int sun4v_vdev_irq_build(struct device_node *dp,
1061                                          unsigned int devino,
1062                                          void *_data)
1063 {
1064         u32 devhandle = (u32) (unsigned long) _data;
1065
1066         return sun4v_build_irq(devhandle, devino);
1067 }
1068
1069 static void sun4v_vdev_irq_trans_init(struct device_node *dp)
1070 {
1071         struct linux_prom64_registers *regs;
1072
1073         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
1074         dp->irq_trans->irq_build = sun4v_vdev_irq_build;
1075
1076         regs = of_get_property(dp, "reg", NULL);
1077         dp->irq_trans->data = (void *) (unsigned long)
1078                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
1079 }
1080
1081 static void irq_trans_init(struct device_node *dp)
1082 {
1083         const char *model;
1084 #ifdef CONFIG_PCI
1085         int i;
1086 #endif
1087
1088         model = of_get_property(dp, "model", NULL);
1089         if (!model)
1090                 model = of_get_property(dp, "compatible", NULL);
1091         if (!model)
1092                 return;
1093
1094 #ifdef CONFIG_PCI
1095         for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
1096                 struct irq_trans *t = &pci_irq_trans_table[i];
1097
1098                 if (!strcmp(model, t->name))
1099                         return t->init(dp);
1100         }
1101 #endif
1102 #ifdef CONFIG_SBUS
1103         if (!strcmp(dp->name, "sbus") ||
1104             !strcmp(dp->name, "sbi"))
1105                 return sbus_irq_trans_init(dp);
1106 #endif
1107         if (!strcmp(dp->name, "central"))
1108                 return central_irq_trans_init(dp->child);
1109         if (!strcmp(dp->name, "virtual-devices"))
1110                 return sun4v_vdev_irq_trans_init(dp);
1111 }
1112
1113 static int is_root_node(const struct device_node *dp)
1114 {
1115         if (!dp)
1116                 return 0;
1117
1118         return (dp->parent == NULL);
1119 }
1120
1121 /* The following routines deal with the black magic of fully naming a
1122  * node.
1123  *
1124  * Certain well known named nodes are just the simple name string.
1125  *
1126  * Actual devices have an address specifier appended to the base name
1127  * string, like this "foo@addr".  The "addr" can be in any number of
1128  * formats, and the platform plus the type of the node determine the
1129  * format and how it is constructed.
1130  *
1131  * For children of the ROOT node, the naming convention is fixed and
1132  * determined by whether this is a sun4u or sun4v system.
1133  *
1134  * For children of other nodes, it is bus type specific.  So
1135  * we walk up the tree until we discover a "device_type" property
1136  * we recognize and we go from there.
1137  *
1138  * As an example, the boot device on my workstation has a full path:
1139  *
1140  *      /pci@1e,600000/ide@d/disk@0,0:c
1141  */
1142 static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
1143 {
1144         struct linux_prom64_registers *regs;
1145         struct property *rprop;
1146         u32 high_bits, low_bits, type;
1147
1148         rprop = of_find_property(dp, "reg", NULL);
1149         if (!rprop)
1150                 return;
1151
1152         regs = rprop->value;
1153         if (!is_root_node(dp->parent)) {
1154                 sprintf(tmp_buf, "%s@%x,%x",
1155                         dp->name,
1156                         (unsigned int) (regs->phys_addr >> 32UL),
1157                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1158                 return;
1159         }
1160
1161         type = regs->phys_addr >> 60UL;
1162         high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
1163         low_bits = (regs->phys_addr & 0xffffffffUL);
1164
1165         if (type == 0 || type == 8) {
1166                 const char *prefix = (type == 0) ? "m" : "i";
1167
1168                 if (low_bits)
1169                         sprintf(tmp_buf, "%s@%s%x,%x",
1170                                 dp->name, prefix,
1171                                 high_bits, low_bits);
1172                 else
1173                         sprintf(tmp_buf, "%s@%s%x",
1174                                 dp->name,
1175                                 prefix,
1176                                 high_bits);
1177         } else if (type == 12) {
1178                 sprintf(tmp_buf, "%s@%x",
1179                         dp->name, high_bits);
1180         }
1181 }
1182
1183 static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
1184 {
1185         struct linux_prom64_registers *regs;
1186         struct property *prop;
1187
1188         prop = of_find_property(dp, "reg", NULL);
1189         if (!prop)
1190                 return;
1191
1192         regs = prop->value;
1193         if (!is_root_node(dp->parent)) {
1194                 sprintf(tmp_buf, "%s@%x,%x",
1195                         dp->name,
1196                         (unsigned int) (regs->phys_addr >> 32UL),
1197                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1198                 return;
1199         }
1200
1201         prop = of_find_property(dp, "upa-portid", NULL);
1202         if (!prop)
1203                 prop = of_find_property(dp, "portid", NULL);
1204         if (prop) {
1205                 unsigned long mask = 0xffffffffUL;
1206
1207                 if (tlb_type >= cheetah)
1208                         mask = 0x7fffff;
1209
1210                 sprintf(tmp_buf, "%s@%x,%x",
1211                         dp->name,
1212                         *(u32 *)prop->value,
1213                         (unsigned int) (regs->phys_addr & mask));
1214         }
1215 }
1216
1217 /* "name@slot,offset"  */
1218 static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
1219 {
1220         struct linux_prom_registers *regs;
1221         struct property *prop;
1222
1223         prop = of_find_property(dp, "reg", NULL);
1224         if (!prop)
1225                 return;
1226
1227         regs = prop->value;
1228         sprintf(tmp_buf, "%s@%x,%x",
1229                 dp->name,
1230                 regs->which_io,
1231                 regs->phys_addr);
1232 }
1233
1234 /* "name@devnum[,func]" */
1235 static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
1236 {
1237         struct linux_prom_pci_registers *regs;
1238         struct property *prop;
1239         unsigned int devfn;
1240
1241         prop = of_find_property(dp, "reg", NULL);
1242         if (!prop)
1243                 return;
1244
1245         regs = prop->value;
1246         devfn = (regs->phys_hi >> 8) & 0xff;
1247         if (devfn & 0x07) {
1248                 sprintf(tmp_buf, "%s@%x,%x",
1249                         dp->name,
1250                         devfn >> 3,
1251                         devfn & 0x07);
1252         } else {
1253                 sprintf(tmp_buf, "%s@%x",
1254                         dp->name,
1255                         devfn >> 3);
1256         }
1257 }
1258
1259 /* "name@UPA_PORTID,offset" */
1260 static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
1261 {
1262         struct linux_prom64_registers *regs;
1263         struct property *prop;
1264
1265         prop = of_find_property(dp, "reg", NULL);
1266         if (!prop)
1267                 return;
1268
1269         regs = prop->value;
1270
1271         prop = of_find_property(dp, "upa-portid", NULL);
1272         if (!prop)
1273                 return;
1274
1275         sprintf(tmp_buf, "%s@%x,%x",
1276                 dp->name,
1277                 *(u32 *) prop->value,
1278                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1279 }
1280
1281 /* "name@reg" */
1282 static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
1283 {
1284         struct property *prop;
1285         u32 *regs;
1286
1287         prop = of_find_property(dp, "reg", NULL);
1288         if (!prop)
1289                 return;
1290
1291         regs = prop->value;
1292
1293         sprintf(tmp_buf, "%s@%x", dp->name, *regs);
1294 }
1295
1296 /* "name@addrhi,addrlo" */
1297 static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
1298 {
1299         struct linux_prom64_registers *regs;
1300         struct property *prop;
1301
1302         prop = of_find_property(dp, "reg", NULL);
1303         if (!prop)
1304                 return;
1305
1306         regs = prop->value;
1307
1308         sprintf(tmp_buf, "%s@%x,%x",
1309                 dp->name,
1310                 (unsigned int) (regs->phys_addr >> 32UL),
1311                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1312 }
1313
1314 /* "name@bus,addr" */
1315 static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
1316 {
1317         struct property *prop;
1318         u32 *regs;
1319
1320         prop = of_find_property(dp, "reg", NULL);
1321         if (!prop)
1322                 return;
1323
1324         regs = prop->value;
1325
1326         /* This actually isn't right... should look at the #address-cells
1327          * property of the i2c bus node etc. etc.
1328          */
1329         sprintf(tmp_buf, "%s@%x,%x",
1330                 dp->name, regs[0], regs[1]);
1331 }
1332
1333 /* "name@reg0[,reg1]" */
1334 static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
1335 {
1336         struct property *prop;
1337         u32 *regs;
1338
1339         prop = of_find_property(dp, "reg", NULL);
1340         if (!prop)
1341                 return;
1342
1343         regs = prop->value;
1344
1345         if (prop->length == sizeof(u32) || regs[1] == 1) {
1346                 sprintf(tmp_buf, "%s@%x",
1347                         dp->name, regs[0]);
1348         } else {
1349                 sprintf(tmp_buf, "%s@%x,%x",
1350                         dp->name, regs[0], regs[1]);
1351         }
1352 }
1353
1354 /* "name@reg0reg1[,reg2reg3]" */
1355 static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
1356 {
1357         struct property *prop;
1358         u32 *regs;
1359
1360         prop = of_find_property(dp, "reg", NULL);
1361         if (!prop)
1362                 return;
1363
1364         regs = prop->value;
1365
1366         if (regs[2] || regs[3]) {
1367                 sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
1368                         dp->name, regs[0], regs[1], regs[2], regs[3]);
1369         } else {
1370                 sprintf(tmp_buf, "%s@%08x%08x",
1371                         dp->name, regs[0], regs[1]);
1372         }
1373 }
1374
1375 static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
1376 {
1377         struct device_node *parent = dp->parent;
1378
1379         if (parent != NULL) {
1380                 if (!strcmp(parent->type, "pci") ||
1381                     !strcmp(parent->type, "pciex"))
1382                         return pci_path_component(dp, tmp_buf);
1383                 if (!strcmp(parent->type, "sbus"))
1384                         return sbus_path_component(dp, tmp_buf);
1385                 if (!strcmp(parent->type, "upa"))
1386                         return upa_path_component(dp, tmp_buf);
1387                 if (!strcmp(parent->type, "ebus"))
1388                         return ebus_path_component(dp, tmp_buf);
1389                 if (!strcmp(parent->name, "usb") ||
1390                     !strcmp(parent->name, "hub"))
1391                         return usb_path_component(dp, tmp_buf);
1392                 if (!strcmp(parent->type, "i2c"))
1393                         return i2c_path_component(dp, tmp_buf);
1394                 if (!strcmp(parent->type, "firewire"))
1395                         return ieee1394_path_component(dp, tmp_buf);
1396                 if (!strcmp(parent->type, "virtual-devices"))
1397                         return vdev_path_component(dp, tmp_buf);
1398
1399                 /* "isa" is handled with platform naming */
1400         }
1401
1402         /* Use platform naming convention.  */
1403         if (tlb_type == hypervisor)
1404                 return sun4v_path_component(dp, tmp_buf);
1405         else
1406                 return sun4u_path_component(dp, tmp_buf);
1407 }
1408
1409 static char * __init build_path_component(struct device_node *dp)
1410 {
1411         char tmp_buf[64], *n;
1412
1413         tmp_buf[0] = '\0';
1414         __build_path_component(dp, tmp_buf);
1415         if (tmp_buf[0] == '\0')
1416                 strcpy(tmp_buf, dp->name);
1417
1418         n = prom_early_alloc(strlen(tmp_buf) + 1);
1419         strcpy(n, tmp_buf);
1420
1421         return n;
1422 }
1423
1424 static char * __init build_full_name(struct device_node *dp)
1425 {
1426         int len, ourlen, plen;
1427         char *n;
1428
1429         plen = strlen(dp->parent->full_name);
1430         ourlen = strlen(dp->path_component_name);
1431         len = ourlen + plen + 2;
1432
1433         n = prom_early_alloc(len);
1434         strcpy(n, dp->parent->full_name);
1435         if (!is_root_node(dp->parent)) {
1436                 strcpy(n + plen, "/");
1437                 plen++;
1438         }
1439         strcpy(n + plen, dp->path_component_name);
1440
1441         return n;
1442 }
1443
1444 static unsigned int unique_id;
1445
1446 static struct property * __init build_one_prop(phandle node, char *prev, char *special_name, void *special_val, int special_len)
1447 {
1448         static struct property *tmp = NULL;
1449         struct property *p;
1450
1451         if (tmp) {
1452                 p = tmp;
1453                 memset(p, 0, sizeof(*p) + 32);
1454                 tmp = NULL;
1455         } else {
1456                 p = prom_early_alloc(sizeof(struct property) + 32);
1457                 p->unique_id = unique_id++;
1458         }
1459
1460         p->name = (char *) (p + 1);
1461         if (special_name) {
1462                 strcpy(p->name, special_name);
1463                 p->length = special_len;
1464                 p->value = prom_early_alloc(special_len);
1465                 memcpy(p->value, special_val, special_len);
1466         } else {
1467                 if (prev == NULL) {
1468                         prom_firstprop(node, p->name);
1469                 } else {
1470                         prom_nextprop(node, prev, p->name);
1471                 }
1472                 if (strlen(p->name) == 0) {
1473                         tmp = p;
1474                         return NULL;
1475                 }
1476                 p->length = prom_getproplen(node, p->name);
1477                 if (p->length <= 0) {
1478                         p->length = 0;
1479                 } else {
1480                         p->value = prom_early_alloc(p->length + 1);
1481                         prom_getproperty(node, p->name, p->value, p->length);
1482                         ((unsigned char *)p->value)[p->length] = '\0';
1483                 }
1484         }
1485         return p;
1486 }
1487
1488 static struct property * __init build_prop_list(phandle node)
1489 {
1490         struct property *head, *tail;
1491
1492         head = tail = build_one_prop(node, NULL,
1493                                      ".node", &node, sizeof(node));
1494
1495         tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
1496         tail = tail->next;
1497         while(tail) {
1498                 tail->next = build_one_prop(node, tail->name,
1499                                             NULL, NULL, 0);
1500                 tail = tail->next;
1501         }
1502
1503         return head;
1504 }
1505
1506 static char * __init get_one_property(phandle node, const char *name)
1507 {
1508         char *buf = "<NULL>";
1509         int len;
1510
1511         len = prom_getproplen(node, name);
1512         if (len > 0) {
1513                 buf = prom_early_alloc(len);
1514                 prom_getproperty(node, name, buf, len);
1515         }
1516
1517         return buf;
1518 }
1519
1520 static struct device_node * __init create_node(phandle node)
1521 {
1522         struct device_node *dp;
1523
1524         if (!node)
1525                 return NULL;
1526
1527         dp = prom_early_alloc(sizeof(*dp));
1528         dp->unique_id = unique_id++;
1529
1530         kref_init(&dp->kref);
1531
1532         dp->name = get_one_property(node, "name");
1533         dp->type = get_one_property(node, "device_type");
1534         dp->node = node;
1535
1536         dp->properties = build_prop_list(node);
1537
1538         irq_trans_init(dp);
1539
1540         return dp;
1541 }
1542
1543 static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
1544 {
1545         struct device_node *dp;
1546
1547         dp = create_node(node);
1548         if (dp) {
1549                 *(*nextp) = dp;
1550                 *nextp = &dp->allnext;
1551
1552                 dp->parent = parent;
1553                 dp->path_component_name = build_path_component(dp);
1554                 dp->full_name = build_full_name(dp);
1555
1556                 dp->child = build_tree(dp, prom_getchild(node), nextp);
1557
1558                 dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
1559         }
1560
1561         return dp;
1562 }
1563
1564 void __init prom_build_devicetree(void)
1565 {
1566         struct device_node **nextp;
1567
1568         allnodes = create_node(prom_root_node);
1569         allnodes->path_component_name = "";
1570         allnodes->full_name = "/";
1571
1572         nextp = &allnodes->allnext;
1573         allnodes->child = build_tree(allnodes,
1574                                      prom_getchild(allnodes->node),
1575                                      &nextp);
1576         printk("PROM: Built device tree with %u bytes of memory.\n",
1577                prom_early_allocated);
1578 }