git.oblomov.eu Git - linux-2.6/blob - 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/kernel.h>
  19 #include <linux/types.h>
  20 #include <linux/string.h>
  21 #include <linux/mm.h>
  22 #include <linux/module.h>
  23 #include <linux/lmb.h>
  24 #include <linux/of_device.h>
  25
  26 #include <asm/prom.h>
  27 #include <asm/oplib.h>
  28 #include <asm/irq.h>
  29 #include <asm/asi.h>
  30 #include <asm/upa.h>
  31 #include <asm/smp.h>
  32
  33 extern struct device_node *allnodes;    /* temporary while merging */
  34
  35 extern rwlock_t devtree_lock;   /* temporary while merging */
  36
  37 struct device_node *of_find_node_by_phandle(phandle handle)
  38 {
  39         struct device_node *np;
  40
  41         for (np = allnodes; np != 0; np = np->allnext)
  42                 if (np->node == handle)
  43                         break;
  44
  45         return np;
  46 }
  47 EXPORT_SYMBOL(of_find_node_by_phandle);
  48
  49 int of_getintprop_default(struct device_node *np, const char *name, int def)
  50 {
  51         struct property *prop;
  52         int len;
  53
  54         prop = of_find_property(np, name, &len);
  55         if (!prop || len != 4)
  56                 return def;
  57
  58         return *(int *) prop->value;
  59 }
  60 EXPORT_SYMBOL(of_getintprop_default);
  61
  62 int of_set_property(struct device_node *dp, const char *name, void *val, int len)
  63 {
  64         struct property **prevp;
  65         void *new_val;
  66         int err;
  67
  68         new_val = kmalloc(len, GFP_KERNEL);
  69         if (!new_val)
  70                 return -ENOMEM;
  71
  72         memcpy(new_val, val, len);
  73
  74         err = -ENODEV;
  75
  76         write_lock(&devtree_lock);
  77         prevp = &dp->properties;
  78         while (*prevp) {
  79                 struct property *prop = *prevp;
  80
  81                 if (!strcasecmp(prop->name, name)) {
  82                         void *old_val = prop->value;
  83                         int ret;
  84
  85                         ret = prom_setprop(dp->node, name, val, len);
  86                         err = -EINVAL;
  87                         if (ret >= 0) {
  88                                 prop->value = new_val;
  89                                 prop->length = len;
  90
  91                                 if (OF_IS_DYNAMIC(prop))
  92                                         kfree(old_val);
  93
  94                                 OF_MARK_DYNAMIC(prop);
  95
  96                                 err = 0;
  97                         }
  98                         break;
  99                 }
 100                 prevp = &(*prevp)->next;
 101         }
 102         write_unlock(&devtree_lock);
 103
 104         /* XXX Upate procfs if necessary... */
 105
 106         return err;
 107 }
 108 EXPORT_SYMBOL(of_set_property);
 109
 110 int of_find_in_proplist(const char *list, const char *match, int len)
 111 {
 112         while (len > 0) {
 113                 int l;
 114
 115                 if (!strcmp(list, match))
 116                         return 1;
 117                 l = strlen(list) + 1;
 118                 list += l;
 119                 len -= l;
 120         }
 121         return 0;
 122 }
 123 EXPORT_SYMBOL(of_find_in_proplist);
 124
 125 static unsigned int prom_early_allocated __initdata;
 126
 127 static void * __init prom_early_alloc(unsigned long size)
 128 {
 129         unsigned long paddr = lmb_alloc(size, SMP_CACHE_BYTES);
 130         void *ret;
 131
 132         if (!paddr) {
 133                 prom_printf("prom_early_alloc(%lu) failed\n");
 134                 prom_halt();
 135         }
 136
 137         ret = __va(paddr);
 138         memset(ret, 0, size);
 139         prom_early_allocated += size;
 140
 141         return ret;
 142 }
 143
 144 #ifdef CONFIG_PCI
 145 /* PSYCHO interrupt mapping support. */
 146 #define PSYCHO_IMAP_A_SLOT0     0x0c00UL
 147 #define PSYCHO_IMAP_B_SLOT0     0x0c20UL
 148 static unsigned long psycho_pcislot_imap_offset(unsigned long ino)
 149 {
 150         unsigned int bus =  (ino & 0x10) >> 4;
 151         unsigned int slot = (ino & 0x0c) >> 2;
 152
 153         if (bus == 0)
 154                 return PSYCHO_IMAP_A_SLOT0 + (slot * 8);
 155         else
 156                 return PSYCHO_IMAP_B_SLOT0 + (slot * 8);
 157 }
 158
 159 #define PSYCHO_OBIO_IMAP_BASE   0x1000UL
 160
 161 #define PSYCHO_ONBOARD_IRQ_BASE         0x20
 162 #define psycho_onboard_imap_offset(__ino) \
 163         (PSYCHO_OBIO_IMAP_BASE + (((__ino) & 0x1f) << 3))
 164
 165 #define PSYCHO_ICLR_A_SLOT0     0x1400UL
 166 #define PSYCHO_ICLR_SCSI        0x1800UL
 167
 168 #define psycho_iclr_offset(ino)                                       \
 169         ((ino & 0x20) ? (PSYCHO_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
 170                         (PSYCHO_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
 171
 172 static unsigned int psycho_irq_build(struct device_node *dp,
 173                                      unsigned int ino,
 174                                      void *_data)
 175 {
 176         unsigned long controller_regs = (unsigned long) _data;
 177         unsigned long imap, iclr;
 178         unsigned long imap_off, iclr_off;
 179         int inofixup = 0;
 180
 181         ino &= 0x3f;
 182         if (ino < PSYCHO_ONBOARD_IRQ_BASE) {
 183                 /* PCI slot */
 184                 imap_off = psycho_pcislot_imap_offset(ino);
 185         } else {
 186                 /* Onboard device */
 187                 imap_off = psycho_onboard_imap_offset(ino);
 188         }
 189
 190         /* Now build the IRQ bucket. */
 191         imap = controller_regs + imap_off;
 192
 193         iclr_off = psycho_iclr_offset(ino);
 194         iclr = controller_regs + iclr_off;
 195
 196         if ((ino & 0x20) == 0)
 197                 inofixup = ino & 0x03;
 198
 199         return build_irq(inofixup, iclr, imap);
 200 }
 201
 202 static void __init psycho_irq_trans_init(struct device_node *dp)
 203 {
 204         const struct linux_prom64_registers *regs;
 205
 206         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 207         dp->irq_trans->irq_build = psycho_irq_build;
 208
 209         regs = of_get_property(dp, "reg", NULL);
 210         dp->irq_trans->data = (void *) regs[2].phys_addr;
 211 }
 212
 213 #define sabre_read(__reg) \
 214 ({      u64 __ret; \
 215         __asm__ __volatile__("ldxa [%1] %2, %0" \
 216                              : "=r" (__ret) \
 217                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
 218                              : "memory"); \
 219         __ret; \
 220 })
 221
 222 struct sabre_irq_data {
 223         unsigned long controller_regs;
 224         unsigned int pci_first_busno;
 225 };
 226 #define SABRE_CONFIGSPACE       0x001000000UL
 227 #define SABRE_WRSYNC            0x1c20UL
 228
 229 #define SABRE_CONFIG_BASE(CONFIG_SPACE) \
 230         (CONFIG_SPACE | (1UL << 24))
 231 #define SABRE_CONFIG_ENCODE(BUS, DEVFN, REG)    \
 232         (((unsigned long)(BUS)   << 16) |       \
 233          ((unsigned long)(DEVFN) << 8)  |       \
 234          ((unsigned long)(REG)))
 235
 236 /* When a device lives behind a bridge deeper in the PCI bus topology
 237  * than APB, a special sequence must run to make sure all pending DMA
 238  * transfers at the time of IRQ delivery are visible in the coherency
 239  * domain by the cpu.  This sequence is to perform a read on the far
 240  * side of the non-APB bridge, then perform a read of Sabre's DMA
 241  * write-sync register.
 242  */
 243 static void sabre_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 244 {
 245         unsigned int phys_hi = (unsigned int) (unsigned long) _arg1;
 246         struct sabre_irq_data *irq_data = _arg2;
 247         unsigned long controller_regs = irq_data->controller_regs;
 248         unsigned long sync_reg = controller_regs + SABRE_WRSYNC;
 249         unsigned long config_space = controller_regs + SABRE_CONFIGSPACE;
 250         unsigned int bus, devfn;
 251         u16 _unused;
 252
 253         config_space = SABRE_CONFIG_BASE(config_space);
 254
 255         bus = (phys_hi >> 16) & 0xff;
 256         devfn = (phys_hi >> 8) & 0xff;
 257
 258         config_space |= SABRE_CONFIG_ENCODE(bus, devfn, 0x00);
 259
 260         __asm__ __volatile__("membar #Sync\n\t"
 261                              "lduha [%1] %2, %0\n\t"
 262                              "membar #Sync"
 263                              : "=r" (_unused)
 264                              : "r" ((u16 *) config_space),
 265                                "i" (ASI_PHYS_BYPASS_EC_E_L)
 266                              : "memory");
 267
 268         sabre_read(sync_reg);
 269 }
 270
 271 #define SABRE_IMAP_A_SLOT0      0x0c00UL
 272 #define SABRE_IMAP_B_SLOT0      0x0c20UL
 273 #define SABRE_ICLR_A_SLOT0      0x1400UL
 274 #define SABRE_ICLR_B_SLOT0      0x1480UL
 275 #define SABRE_ICLR_SCSI         0x1800UL
 276 #define SABRE_ICLR_ETH          0x1808UL
 277 #define SABRE_ICLR_BPP          0x1810UL
 278 #define SABRE_ICLR_AU_REC       0x1818UL
 279 #define SABRE_ICLR_AU_PLAY      0x1820UL
 280 #define SABRE_ICLR_PFAIL        0x1828UL
 281 #define SABRE_ICLR_KMS          0x1830UL
 282 #define SABRE_ICLR_FLPY         0x1838UL
 283 #define SABRE_ICLR_SHW          0x1840UL
 284 #define SABRE_ICLR_KBD          0x1848UL
 285 #define SABRE_ICLR_MS           0x1850UL
 286 #define SABRE_ICLR_SER          0x1858UL
 287 #define SABRE_ICLR_UE           0x1870UL
 288 #define SABRE_ICLR_CE           0x1878UL
 289 #define SABRE_ICLR_PCIERR       0x1880UL
 290
 291 static unsigned long sabre_pcislot_imap_offset(unsigned long ino)
 292 {
 293         unsigned int bus =  (ino & 0x10) >> 4;
 294         unsigned int slot = (ino & 0x0c) >> 2;
 295
 296         if (bus == 0)
 297                 return SABRE_IMAP_A_SLOT0 + (slot * 8);
 298         else
 299                 return SABRE_IMAP_B_SLOT0 + (slot * 8);
 300 }
 301
 302 #define SABRE_OBIO_IMAP_BASE    0x1000UL
 303 #define SABRE_ONBOARD_IRQ_BASE  0x20
 304 #define sabre_onboard_imap_offset(__ino) \
 305         (SABRE_OBIO_IMAP_BASE + (((__ino) & 0x1f) << 3))
 306
 307 #define sabre_iclr_offset(ino)                                        \
 308         ((ino & 0x20) ? (SABRE_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
 309                         (SABRE_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
 310
 311 static int sabre_device_needs_wsync(struct device_node *dp)
 312 {
 313         struct device_node *parent = dp->parent;
 314         const char *parent_model, *parent_compat;
 315
 316         /* This traversal up towards the root is meant to
 317          * handle two cases:
 318          *
 319          * 1) non-PCI bus sitting under PCI, such as 'ebus'
 320          * 2) the PCI controller interrupts themselves, which
 321          *    will use the sabre_irq_build but do not need
 322          *    the DMA synchronization handling
 323          */
 324         while (parent) {
 325                 if (!strcmp(parent->type, "pci"))
 326                         break;
 327                 parent = parent->parent;
 328         }
 329
 330         if (!parent)
 331                 return 0;
 332
 333         parent_model = of_get_property(parent,
 334                                        "model", NULL);
 335         if (parent_model &&
 336             (!strcmp(parent_model, "SUNW,sabre") ||
 337              !strcmp(parent_model, "SUNW,simba")))
 338                 return 0;
 339
 340         parent_compat = of_get_property(parent,
 341                                         "compatible", NULL);
 342         if (parent_compat &&
 343             (!strcmp(parent_compat, "pci108e,a000") ||
 344              !strcmp(parent_compat, "pci108e,a001")))
 345                 return 0;
 346
 347         return 1;
 348 }
 349
 350 static unsigned int sabre_irq_build(struct device_node *dp,
 351                                     unsigned int ino,
 352                                     void *_data)
 353 {
 354         struct sabre_irq_data *irq_data = _data;
 355         unsigned long controller_regs = irq_data->controller_regs;
 356         const struct linux_prom_pci_registers *regs;
 357         unsigned long imap, iclr;
 358         unsigned long imap_off, iclr_off;
 359         int inofixup = 0;
 360         int virt_irq;
 361
 362         ino &= 0x3f;
 363         if (ino < SABRE_ONBOARD_IRQ_BASE) {
 364                 /* PCI slot */
 365                 imap_off = sabre_pcislot_imap_offset(ino);
 366         } else {
 367                 /* onboard device */
 368                 imap_off = sabre_onboard_imap_offset(ino);
 369         }
 370
 371         /* Now build the IRQ bucket. */
 372         imap = controller_regs + imap_off;
 373
 374         iclr_off = sabre_iclr_offset(ino);
 375         iclr = controller_regs + iclr_off;
 376
 377         if ((ino & 0x20) == 0)
 378                 inofixup = ino & 0x03;
 379
 380         virt_irq = build_irq(inofixup, iclr, imap);
 381
 382         /* If the parent device is a PCI<->PCI bridge other than
 383          * APB, we have to install a pre-handler to ensure that
 384          * all pending DMA is drained before the interrupt handler
 385          * is run.
 386          */
 387         regs = of_get_property(dp, "reg", NULL);
 388         if (regs && sabre_device_needs_wsync(dp)) {
 389                 irq_install_pre_handler(virt_irq,
 390                                         sabre_wsync_handler,
 391                                         (void *) (long) regs->phys_hi,
 392                                         (void *) irq_data);
 393         }
 394
 395         return virt_irq;
 396 }
 397
 398 static void __init sabre_irq_trans_init(struct device_node *dp)
 399 {
 400         const struct linux_prom64_registers *regs;
 401         struct sabre_irq_data *irq_data;
 402         const u32 *busrange;
 403
 404         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 405         dp->irq_trans->irq_build = sabre_irq_build;
 406
 407         irq_data = prom_early_alloc(sizeof(struct sabre_irq_data));
 408
 409         regs = of_get_property(dp, "reg", NULL);
 410         irq_data->controller_regs = regs[0].phys_addr;
 411
 412         busrange = of_get_property(dp, "bus-range", NULL);
 413         irq_data->pci_first_busno = busrange[0];
 414
 415         dp->irq_trans->data = irq_data;
 416 }
 417
 418 /* SCHIZO interrupt mapping support.  Unlike Psycho, for this controller the
 419  * imap/iclr registers are per-PBM.
 420  */
 421 #define SCHIZO_IMAP_BASE        0x1000UL
 422 #define SCHIZO_ICLR_BASE        0x1400UL
 423
 424 static unsigned long schizo_imap_offset(unsigned long ino)
 425 {
 426         return SCHIZO_IMAP_BASE + (ino * 8UL);
 427 }
 428
 429 static unsigned long schizo_iclr_offset(unsigned long ino)
 430 {
 431         return SCHIZO_ICLR_BASE + (ino * 8UL);
 432 }
 433
 434 static unsigned long schizo_ino_to_iclr(unsigned long pbm_regs,
 435                                         unsigned int ino)
 436 {
 437
 438         return pbm_regs + schizo_iclr_offset(ino);
 439 }
 440
 441 static unsigned long schizo_ino_to_imap(unsigned long pbm_regs,
 442                                         unsigned int ino)
 443 {
 444         return pbm_regs + schizo_imap_offset(ino);
 445 }
 446
 447 #define schizo_read(__reg) \
 448 ({      u64 __ret; \
 449         __asm__ __volatile__("ldxa [%1] %2, %0" \
 450                              : "=r" (__ret) \
 451                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
 452                              : "memory"); \
 453         __ret; \
 454 })
 455 #define schizo_write(__reg, __val) \
 456         __asm__ __volatile__("stxa %0, [%1] %2" \
 457                              : /* no outputs */ \
 458                              : "r" (__val), "r" (__reg), \
 459                                "i" (ASI_PHYS_BYPASS_EC_E) \
 460                              : "memory")
 461
 462 static void tomatillo_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 463 {
 464         unsigned long sync_reg = (unsigned long) _arg2;
 465         u64 mask = 1UL << (ino & IMAP_INO);
 466         u64 val;
 467         int limit;
 468
 469         schizo_write(sync_reg, mask);
 470
 471         limit = 100000;
 472         val = 0;
 473         while (--limit) {
 474                 val = schizo_read(sync_reg);
 475                 if (!(val & mask))
 476                         break;
 477         }
 478         if (limit <= 0) {
 479                 printk("tomatillo_wsync_handler: DMA won't sync [%lx:%lx]\n",
 480                        val, mask);
 481         }
 482
 483         if (_arg1) {
 484                 static unsigned char cacheline[64]
 485                         __attribute__ ((aligned (64)));
 486
 487                 __asm__ __volatile__("rd %%fprs, %0\n\t"
 488                                      "or %0, %4, %1\n\t"
 489                                      "wr %1, 0x0, %%fprs\n\t"
 490                                      "stda %%f0, [%5] %6\n\t"
 491                                      "wr %0, 0x0, %%fprs\n\t"
 492                                      "membar #Sync"
 493                                      : "=&r" (mask), "=&r" (val)
 494                                      : "0" (mask), "1" (val),
 495                                      "i" (FPRS_FEF), "r" (&cacheline[0]),
 496                                      "i" (ASI_BLK_COMMIT_P));
 497         }
 498 }
 499
 500 struct schizo_irq_data {
 501         unsigned long pbm_regs;
 502         unsigned long sync_reg;
 503         u32 portid;
 504         int chip_version;
 505 };
 506
 507 static unsigned int schizo_irq_build(struct device_node *dp,
 508                                      unsigned int ino,
 509                                      void *_data)
 510 {
 511         struct schizo_irq_data *irq_data = _data;
 512         unsigned long pbm_regs = irq_data->pbm_regs;
 513         unsigned long imap, iclr;
 514         int ign_fixup;
 515         int virt_irq;
 516         int is_tomatillo;
 517
 518         ino &= 0x3f;
 519
 520         /* Now build the IRQ bucket. */
 521         imap = schizo_ino_to_imap(pbm_regs, ino);
 522         iclr = schizo_ino_to_iclr(pbm_regs, ino);
 523
 524         /* On Schizo, no inofixup occurs.  This is because each
 525          * INO has it's own IMAP register.  On Psycho and Sabre
 526          * there is only one IMAP register for each PCI slot even
 527          * though four different INOs can be generated by each
 528          * PCI slot.
 529          *
 530          * But, for JBUS variants (essentially, Tomatillo), we have
 531          * to fixup the lowest bit of the interrupt group number.
 532          */
 533         ign_fixup = 0;
 534
 535         is_tomatillo = (irq_data->sync_reg != 0UL);
 536
 537         if (is_tomatillo) {
 538                 if (irq_data->portid & 1)
 539                         ign_fixup = (1 << 6);
 540         }
 541
 542         virt_irq = build_irq(ign_fixup, iclr, imap);
 543
 544         if (is_tomatillo) {
 545                 irq_install_pre_handler(virt_irq,
 546                                         tomatillo_wsync_handler,
 547                                         ((irq_data->chip_version <= 4) ?
 548                                          (void *) 1 : (void *) 0),
 549                                         (void *) irq_data->sync_reg);
 550         }
 551
 552         return virt_irq;
 553 }
 554
 555 static void __init __schizo_irq_trans_init(struct device_node *dp,
 556                                            int is_tomatillo)
 557 {
 558         const struct linux_prom64_registers *regs;
 559         struct schizo_irq_data *irq_data;
 560
 561         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 562         dp->irq_trans->irq_build = schizo_irq_build;
 563
 564         irq_data = prom_early_alloc(sizeof(struct schizo_irq_data));
 565
 566         regs = of_get_property(dp, "reg", NULL);
 567         dp->irq_trans->data = irq_data;
 568
 569         irq_data->pbm_regs = regs[0].phys_addr;
 570         if (is_tomatillo)
 571                 irq_data->sync_reg = regs[3].phys_addr + 0x1a18UL;
 572         else
 573                 irq_data->sync_reg = 0UL;
 574         irq_data->portid = of_getintprop_default(dp, "portid", 0);
 575         irq_data->chip_version = of_getintprop_default(dp, "version#", 0);
 576 }
 577
 578 static void __init schizo_irq_trans_init(struct device_node *dp)
 579 {
 580         __schizo_irq_trans_init(dp, 0);
 581 }
 582
 583 static void __init tomatillo_irq_trans_init(struct device_node *dp)
 584 {
 585         __schizo_irq_trans_init(dp, 1);
 586 }
 587
 588 static unsigned int pci_sun4v_irq_build(struct device_node *dp,
 589                                         unsigned int devino,
 590                                         void *_data)
 591 {
 592         u32 devhandle = (u32) (unsigned long) _data;
 593
 594         return sun4v_build_irq(devhandle, devino);
 595 }
 596
 597 static void __init pci_sun4v_irq_trans_init(struct device_node *dp)
 598 {
 599         const struct linux_prom64_registers *regs;
 600
 601         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 602         dp->irq_trans->irq_build = pci_sun4v_irq_build;
 603
 604         regs = of_get_property(dp, "reg", NULL);
 605         dp->irq_trans->data = (void *) (unsigned long)
 606                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
 607 }
 608
 609 struct fire_irq_data {
 610         unsigned long pbm_regs;
 611         u32 portid;
 612 };
 613
 614 #define FIRE_IMAP_BASE  0x001000
 615 #define FIRE_ICLR_BASE  0x001400
 616
 617 static unsigned long fire_imap_offset(unsigned long ino)
 618 {
 619         return FIRE_IMAP_BASE + (ino * 8UL);
 620 }
 621
 622 static unsigned long fire_iclr_offset(unsigned long ino)
 623 {
 624         return FIRE_ICLR_BASE + (ino * 8UL);
 625 }
 626
 627 static unsigned long fire_ino_to_iclr(unsigned long pbm_regs,
 628                                             unsigned int ino)
 629 {
 630         return pbm_regs + fire_iclr_offset(ino);
 631 }
 632
 633 static unsigned long fire_ino_to_imap(unsigned long pbm_regs,
 634                                             unsigned int ino)
 635 {
 636         return pbm_regs + fire_imap_offset(ino);
 637 }
 638
 639 static unsigned int fire_irq_build(struct device_node *dp,
 640                                          unsigned int ino,
 641                                          void *_data)
 642 {
 643         struct fire_irq_data *irq_data = _data;
 644         unsigned long pbm_regs = irq_data->pbm_regs;
 645         unsigned long imap, iclr;
 646         unsigned long int_ctrlr;
 647
 648         ino &= 0x3f;
 649
 650         /* Now build the IRQ bucket. */
 651         imap = fire_ino_to_imap(pbm_regs, ino);
 652         iclr = fire_ino_to_iclr(pbm_regs, ino);
 653
 654         /* Set the interrupt controller number.  */
 655         int_ctrlr = 1 << 6;
 656         upa_writeq(int_ctrlr, imap);
 657
 658         /* The interrupt map registers do not have an INO field
 659          * like other chips do.  They return zero in the INO
 660          * field, and the interrupt controller number is controlled
 661          * in bits 6 to 9.  So in order for build_irq() to get
 662          * the INO right we pass it in as part of the fixup
 663          * which will get added to the map register zero value
 664          * read by build_irq().
 665          */
 666         ino |= (irq_data->portid << 6);
 667         ino -= int_ctrlr;
 668         return build_irq(ino, iclr, imap);
 669 }
 670
 671 static void __init fire_irq_trans_init(struct device_node *dp)
 672 {
 673         const struct linux_prom64_registers *regs;
 674         struct fire_irq_data *irq_data;
 675
 676         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 677         dp->irq_trans->irq_build = fire_irq_build;
 678
 679         irq_data = prom_early_alloc(sizeof(struct fire_irq_data));
 680
 681         regs = of_get_property(dp, "reg", NULL);
 682         dp->irq_trans->data = irq_data;
 683
 684         irq_data->pbm_regs = regs[0].phys_addr;
 685         irq_data->portid = of_getintprop_default(dp, "portid", 0);
 686 }
 687 #endif /* CONFIG_PCI */
 688
 689 #ifdef CONFIG_SBUS
 690 /* INO number to IMAP register offset for SYSIO external IRQ's.
 691  * This should conform to both Sunfire/Wildfire server and Fusion
 692  * desktop designs.
 693  */
 694 #define SYSIO_IMAP_SLOT0        0x2c00UL
 695 #define SYSIO_IMAP_SLOT1        0x2c08UL
 696 #define SYSIO_IMAP_SLOT2        0x2c10UL
 697 #define SYSIO_IMAP_SLOT3        0x2c18UL
 698 #define SYSIO_IMAP_SCSI         0x3000UL
 699 #define SYSIO_IMAP_ETH          0x3008UL
 700 #define SYSIO_IMAP_BPP          0x3010UL
 701 #define SYSIO_IMAP_AUDIO        0x3018UL
 702 #define SYSIO_IMAP_PFAIL        0x3020UL
 703 #define SYSIO_IMAP_KMS          0x3028UL
 704 #define SYSIO_IMAP_FLPY         0x3030UL
 705 #define SYSIO_IMAP_SHW          0x3038UL
 706 #define SYSIO_IMAP_KBD          0x3040UL
 707 #define SYSIO_IMAP_MS           0x3048UL
 708 #define SYSIO_IMAP_SER          0x3050UL
 709 #define SYSIO_IMAP_TIM0         0x3060UL
 710 #define SYSIO_IMAP_TIM1         0x3068UL
 711 #define SYSIO_IMAP_UE           0x3070UL
 712 #define SYSIO_IMAP_CE           0x3078UL
 713 #define SYSIO_IMAP_SBERR        0x3080UL
 714 #define SYSIO_IMAP_PMGMT        0x3088UL
 715 #define SYSIO_IMAP_GFX          0x3090UL
 716 #define SYSIO_IMAP_EUPA         0x3098UL
 717
 718 #define bogon     ((unsigned long) -1)
 719 static unsigned long sysio_irq_offsets[] = {
 720         /* SBUS Slot 0 --> 3, level 1 --> 7 */
 721         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 722         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 723         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 724         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 725         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 726         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 727         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 728         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 729
 730         /* Onboard devices (not relevant/used on SunFire). */
 731         SYSIO_IMAP_SCSI,
 732         SYSIO_IMAP_ETH,
 733         SYSIO_IMAP_BPP,
 734         bogon,
 735         SYSIO_IMAP_AUDIO,
 736         SYSIO_IMAP_PFAIL,
 737         bogon,
 738         bogon,
 739         SYSIO_IMAP_KMS,
 740         SYSIO_IMAP_FLPY,
 741         SYSIO_IMAP_SHW,
 742         SYSIO_IMAP_KBD,
 743         SYSIO_IMAP_MS,
 744         SYSIO_IMAP_SER,
 745         bogon,
 746         bogon,
 747         SYSIO_IMAP_TIM0,
 748         SYSIO_IMAP_TIM1,
 749         bogon,
 750         bogon,
 751         SYSIO_IMAP_UE,
 752         SYSIO_IMAP_CE,
 753         SYSIO_IMAP_SBERR,
 754         SYSIO_IMAP_PMGMT,
 755         SYSIO_IMAP_GFX,
 756         SYSIO_IMAP_EUPA,
 757 };
 758
 759 #undef bogon
 760
 761 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
 762
 763 /* Convert Interrupt Mapping register pointer to associated
 764  * Interrupt Clear register pointer, SYSIO specific version.
 765  */
 766 #define SYSIO_ICLR_UNUSED0      0x3400UL
 767 #define SYSIO_ICLR_SLOT0        0x3408UL
 768 #define SYSIO_ICLR_SLOT1        0x3448UL
 769 #define SYSIO_ICLR_SLOT2        0x3488UL
 770 #define SYSIO_ICLR_SLOT3        0x34c8UL
 771 static unsigned long sysio_imap_to_iclr(unsigned long imap)
 772 {
 773         unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
 774         return imap + diff;
 775 }
 776
 777 static unsigned int sbus_of_build_irq(struct device_node *dp,
 778                                       unsigned int ino,
 779                                       void *_data)
 780 {
 781         unsigned long reg_base = (unsigned long) _data;
 782         const struct linux_prom_registers *regs;
 783         unsigned long imap, iclr;
 784         int sbus_slot = 0;
 785         int sbus_level = 0;
 786
 787         ino &= 0x3f;
 788
 789         regs = of_get_property(dp, "reg", NULL);
 790         if (regs)
 791                 sbus_slot = regs->which_io;
 792
 793         if (ino < 0x20)
 794                 ino += (sbus_slot * 8);
 795
 796         imap = sysio_irq_offsets[ino];
 797         if (imap == ((unsigned long)-1)) {
 798                 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
 799                             ino);
 800                 prom_halt();
 801         }
 802         imap += reg_base;
 803
 804         /* SYSIO inconsistency.  For external SLOTS, we have to select
 805          * the right ICLR register based upon the lower SBUS irq level
 806          * bits.
 807          */
 808         if (ino >= 0x20) {
 809                 iclr = sysio_imap_to_iclr(imap);
 810         } else {
 811                 sbus_level = ino & 0x7;
 812
 813                 switch(sbus_slot) {
 814                 case 0:
 815                         iclr = reg_base + SYSIO_ICLR_SLOT0;
 816                         break;
 817                 case 1:
 818                         iclr = reg_base + SYSIO_ICLR_SLOT1;
 819                         break;
 820                 case 2:
 821                         iclr = reg_base + SYSIO_ICLR_SLOT2;
 822                         break;
 823                 default:
 824                 case 3:
 825                         iclr = reg_base + SYSIO_ICLR_SLOT3;
 826                         break;
 827                 };
 828
 829                 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
 830         }
 831         return build_irq(sbus_level, iclr, imap);
 832 }
 833
 834 static void __init sbus_irq_trans_init(struct device_node *dp)
 835 {
 836         const struct linux_prom64_registers *regs;
 837
 838         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 839         dp->irq_trans->irq_build = sbus_of_build_irq;
 840
 841         regs = of_get_property(dp, "reg", NULL);
 842         dp->irq_trans->data = (void *) (unsigned long) regs->phys_addr;
 843 }
 844 #endif /* CONFIG_SBUS */
 845
 846
 847 static unsigned int central_build_irq(struct device_node *dp,
 848                                       unsigned int ino,
 849                                       void *_data)
 850 {
 851         struct device_node *central_dp = _data;
 852         struct of_device *central_op = of_find_device_by_node(central_dp);
 853         struct resource *res;
 854         unsigned long imap, iclr;
 855         u32 tmp;
 856
 857         if (!strcmp(dp->name, "eeprom")) {
 858                 res = &central_op->resource[5];
 859         } else if (!strcmp(dp->name, "zs")) {
 860                 res = &central_op->resource[4];
 861         } else if (!strcmp(dp->name, "clock-board")) {
 862                 res = &central_op->resource[3];
 863         } else {
 864                 return ino;
 865         }
 866
 867         imap = res->start + 0x00UL;
 868         iclr = res->start + 0x10UL;
 869
 870         /* Set the INO state to idle, and disable.  */
 871         upa_writel(0, iclr);
 872         upa_readl(iclr);
 873
 874         tmp = upa_readl(imap);
 875         tmp &= ~0x80000000;
 876         upa_writel(tmp, imap);
 877
 878         return build_irq(0, iclr, imap);
 879 }
 880
 881 static void __init central_irq_trans_init(struct device_node *dp)
 882 {
 883         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 884         dp->irq_trans->irq_build = central_build_irq;
 885
 886         dp->irq_trans->data = dp;
 887 }
 888
 889 struct irq_trans {
 890         const char *name;
 891         void (*init)(struct device_node *);
 892 };
 893
 894 #ifdef CONFIG_PCI
 895 static struct irq_trans __initdata pci_irq_trans_table[] = {
 896         { "SUNW,sabre", sabre_irq_trans_init },
 897         { "pci108e,a000", sabre_irq_trans_init },
 898         { "pci108e,a001", sabre_irq_trans_init },
 899         { "SUNW,psycho", psycho_irq_trans_init },
 900         { "pci108e,8000", psycho_irq_trans_init },
 901         { "SUNW,schizo", schizo_irq_trans_init },
 902         { "pci108e,8001", schizo_irq_trans_init },
 903         { "SUNW,schizo+", schizo_irq_trans_init },
 904         { "pci108e,8002", schizo_irq_trans_init },
 905         { "SUNW,tomatillo", tomatillo_irq_trans_init },
 906         { "pci108e,a801", tomatillo_irq_trans_init },
 907         { "SUNW,sun4v-pci", pci_sun4v_irq_trans_init },
 908         { "pciex108e,80f0", fire_irq_trans_init },
 909 };
 910 #endif
 911
 912 static unsigned int sun4v_vdev_irq_build(struct device_node *dp,
 913                                          unsigned int devino,
 914                                          void *_data)
 915 {
 916         u32 devhandle = (u32) (unsigned long) _data;
 917
 918         return sun4v_build_irq(devhandle, devino);
 919 }
 920
 921 static void __init sun4v_vdev_irq_trans_init(struct device_node *dp)
 922 {
 923         const struct linux_prom64_registers *regs;
 924
 925         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 926         dp->irq_trans->irq_build = sun4v_vdev_irq_build;
 927
 928         regs = of_get_property(dp, "reg", NULL);
 929         dp->irq_trans->data = (void *) (unsigned long)
 930                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
 931 }
 932
 933 static void __init irq_trans_init(struct device_node *dp)
 934 {
 935 #ifdef CONFIG_PCI
 936         const char *model;
 937         int i;
 938 #endif
 939
 940 #ifdef CONFIG_PCI
 941         model = of_get_property(dp, "model", NULL);
 942         if (!model)
 943                 model = of_get_property(dp, "compatible", NULL);
 944         if (model) {
 945                 for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
 946                         struct irq_trans *t = &pci_irq_trans_table[i];
 947
 948                         if (!strcmp(model, t->name))
 949                                 return t->init(dp);
 950                 }
 951         }
 952 #endif
 953 #ifdef CONFIG_SBUS
 954         if (!strcmp(dp->name, "sbus") ||
 955             !strcmp(dp->name, "sbi"))
 956                 return sbus_irq_trans_init(dp);
 957 #endif
 958         if (!strcmp(dp->name, "fhc") &&
 959             !strcmp(dp->parent->name, "central"))
 960                 return central_irq_trans_init(dp);
 961         if (!strcmp(dp->name, "virtual-devices") ||
 962             !strcmp(dp->name, "niu"))
 963                 return sun4v_vdev_irq_trans_init(dp);
 964 }
 965
 966 static int is_root_node(const struct device_node *dp)
 967 {
 968         if (!dp)
 969                 return 0;
 970
 971         return (dp->parent == NULL);
 972 }
 973
 974 /* The following routines deal with the black magic of fully naming a
 975  * node.
 976  *
 977  * Certain well known named nodes are just the simple name string.
 978  *
 979  * Actual devices have an address specifier appended to the base name
 980  * string, like this "foo@addr".  The "addr" can be in any number of
 981  * formats, and the platform plus the type of the node determine the
 982  * format and how it is constructed.
 983  *
 984  * For children of the ROOT node, the naming convention is fixed and
 985  * determined by whether this is a sun4u or sun4v system.
 986  *
 987  * For children of other nodes, it is bus type specific.  So
 988  * we walk up the tree until we discover a "device_type" property
 989  * we recognize and we go from there.
 990  *
 991  * As an example, the boot device on my workstation has a full path:
 992  *
 993  *      /pci@1e,600000/ide@d/disk@0,0:c
 994  */
 995 static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
 996 {
 997         struct linux_prom64_registers *regs;
 998         struct property *rprop;
 999         u32 high_bits, low_bits, type;
1000
1001         rprop = of_find_property(dp, "reg", NULL);
1002         if (!rprop)
1003                 return;
1004
1005         regs = rprop->value;
1006         if (!is_root_node(dp->parent)) {
1007                 sprintf(tmp_buf, "%s@%x,%x",
1008                         dp->name,
1009                         (unsigned int) (regs->phys_addr >> 32UL),
1010                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1011                 return;
1012         }
1013
1014         type = regs->phys_addr >> 60UL;
1015         high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
1016         low_bits = (regs->phys_addr & 0xffffffffUL);
1017
1018         if (type == 0 || type == 8) {
1019                 const char *prefix = (type == 0) ? "m" : "i";
1020
1021                 if (low_bits)
1022                         sprintf(tmp_buf, "%s@%s%x,%x",
1023                                 dp->name, prefix,
1024                                 high_bits, low_bits);
1025                 else
1026                         sprintf(tmp_buf, "%s@%s%x",
1027                                 dp->name,
1028                                 prefix,
1029                                 high_bits);
1030         } else if (type == 12) {
1031                 sprintf(tmp_buf, "%s@%x",
1032                         dp->name, high_bits);
1033         }
1034 }
1035
1036 static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
1037 {
1038         struct linux_prom64_registers *regs;
1039         struct property *prop;
1040
1041         prop = of_find_property(dp, "reg", NULL);
1042         if (!prop)
1043                 return;
1044
1045         regs = prop->value;
1046         if (!is_root_node(dp->parent)) {
1047                 sprintf(tmp_buf, "%s@%x,%x",
1048                         dp->name,
1049                         (unsigned int) (regs->phys_addr >> 32UL),
1050                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1051                 return;
1052         }
1053
1054         prop = of_find_property(dp, "upa-portid", NULL);
1055         if (!prop)
1056                 prop = of_find_property(dp, "portid", NULL);
1057         if (prop) {
1058                 unsigned long mask = 0xffffffffUL;
1059
1060                 if (tlb_type >= cheetah)
1061                         mask = 0x7fffff;
1062
1063                 sprintf(tmp_buf, "%s@%x,%x",
1064                         dp->name,
1065                         *(u32 *)prop->value,
1066                         (unsigned int) (regs->phys_addr & mask));
1067         }
1068 }
1069
1070 /* "name@slot,offset"  */
1071 static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
1072 {
1073         struct linux_prom_registers *regs;
1074         struct property *prop;
1075
1076         prop = of_find_property(dp, "reg", NULL);
1077         if (!prop)
1078                 return;
1079
1080         regs = prop->value;
1081         sprintf(tmp_buf, "%s@%x,%x",
1082                 dp->name,
1083                 regs->which_io,
1084                 regs->phys_addr);
1085 }
1086
1087 /* "name@devnum[,func]" */
1088 static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
1089 {
1090         struct linux_prom_pci_registers *regs;
1091         struct property *prop;
1092         unsigned int devfn;
1093
1094         prop = of_find_property(dp, "reg", NULL);
1095         if (!prop)
1096                 return;
1097
1098         regs = prop->value;
1099         devfn = (regs->phys_hi >> 8) & 0xff;
1100         if (devfn & 0x07) {
1101                 sprintf(tmp_buf, "%s@%x,%x",
1102                         dp->name,
1103                         devfn >> 3,
1104                         devfn & 0x07);
1105         } else {
1106                 sprintf(tmp_buf, "%s@%x",
1107                         dp->name,
1108                         devfn >> 3);
1109         }
1110 }
1111
1112 /* "name@UPA_PORTID,offset" */
1113 static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
1114 {
1115         struct linux_prom64_registers *regs;
1116         struct property *prop;
1117
1118         prop = of_find_property(dp, "reg", NULL);
1119         if (!prop)
1120                 return;
1121
1122         regs = prop->value;
1123
1124         prop = of_find_property(dp, "upa-portid", NULL);
1125         if (!prop)
1126                 return;
1127
1128         sprintf(tmp_buf, "%s@%x,%x",
1129                 dp->name,
1130                 *(u32 *) prop->value,
1131                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1132 }
1133
1134 /* "name@reg" */
1135 static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
1136 {
1137         struct property *prop;
1138         u32 *regs;
1139
1140         prop = of_find_property(dp, "reg", NULL);
1141         if (!prop)
1142                 return;
1143
1144         regs = prop->value;
1145
1146         sprintf(tmp_buf, "%s@%x", dp->name, *regs);
1147 }
1148
1149 /* "name@addrhi,addrlo" */
1150 static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
1151 {
1152         struct linux_prom64_registers *regs;
1153         struct property *prop;
1154
1155         prop = of_find_property(dp, "reg", NULL);
1156         if (!prop)
1157                 return;
1158
1159         regs = prop->value;
1160
1161         sprintf(tmp_buf, "%s@%x,%x",
1162                 dp->name,
1163                 (unsigned int) (regs->phys_addr >> 32UL),
1164                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1165 }
1166
1167 /* "name@bus,addr" */
1168 static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
1169 {
1170         struct property *prop;
1171         u32 *regs;
1172
1173         prop = of_find_property(dp, "reg", NULL);
1174         if (!prop)
1175                 return;
1176
1177         regs = prop->value;
1178
1179         /* This actually isn't right... should look at the #address-cells
1180          * property of the i2c bus node etc. etc.
1181          */
1182         sprintf(tmp_buf, "%s@%x,%x",
1183                 dp->name, regs[0], regs[1]);
1184 }
1185
1186 /* "name@reg0[,reg1]" */
1187 static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
1188 {
1189         struct property *prop;
1190         u32 *regs;
1191
1192         prop = of_find_property(dp, "reg", NULL);
1193         if (!prop)
1194                 return;
1195
1196         regs = prop->value;
1197
1198         if (prop->length == sizeof(u32) || regs[1] == 1) {
1199                 sprintf(tmp_buf, "%s@%x",
1200                         dp->name, regs[0]);
1201         } else {
1202                 sprintf(tmp_buf, "%s@%x,%x",
1203                         dp->name, regs[0], regs[1]);
1204         }
1205 }
1206
1207 /* "name@reg0reg1[,reg2reg3]" */
1208 static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
1209 {
1210         struct property *prop;
1211         u32 *regs;
1212
1213         prop = of_find_property(dp, "reg", NULL);
1214         if (!prop)
1215                 return;
1216
1217         regs = prop->value;
1218
1219         if (regs[2] || regs[3]) {
1220                 sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
1221                         dp->name, regs[0], regs[1], regs[2], regs[3]);
1222         } else {
1223                 sprintf(tmp_buf, "%s@%08x%08x",
1224                         dp->name, regs[0], regs[1]);
1225         }
1226 }
1227
1228 static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
1229 {
1230         struct device_node *parent = dp->parent;
1231
1232         if (parent != NULL) {
1233                 if (!strcmp(parent->type, "pci") ||
1234                     !strcmp(parent->type, "pciex"))
1235                         return pci_path_component(dp, tmp_buf);
1236                 if (!strcmp(parent->type, "sbus"))
1237                         return sbus_path_component(dp, tmp_buf);
1238                 if (!strcmp(parent->type, "upa"))
1239                         return upa_path_component(dp, tmp_buf);
1240                 if (!strcmp(parent->type, "ebus"))
1241                         return ebus_path_component(dp, tmp_buf);
1242                 if (!strcmp(parent->name, "usb") ||
1243                     !strcmp(parent->name, "hub"))
1244                         return usb_path_component(dp, tmp_buf);
1245                 if (!strcmp(parent->type, "i2c"))
1246                         return i2c_path_component(dp, tmp_buf);
1247                 if (!strcmp(parent->type, "firewire"))
1248                         return ieee1394_path_component(dp, tmp_buf);
1249                 if (!strcmp(parent->type, "virtual-devices"))
1250                         return vdev_path_component(dp, tmp_buf);
1251
1252                 /* "isa" is handled with platform naming */
1253         }
1254
1255         /* Use platform naming convention.  */
1256         if (tlb_type == hypervisor)
1257                 return sun4v_path_component(dp, tmp_buf);
1258         else
1259                 return sun4u_path_component(dp, tmp_buf);
1260 }
1261
1262 static char * __init build_path_component(struct device_node *dp)
1263 {
1264         char tmp_buf[64], *n;
1265
1266         tmp_buf[0] = '\0';
1267         __build_path_component(dp, tmp_buf);
1268         if (tmp_buf[0] == '\0')
1269                 strcpy(tmp_buf, dp->name);
1270
1271         n = prom_early_alloc(strlen(tmp_buf) + 1);
1272         strcpy(n, tmp_buf);
1273
1274         return n;
1275 }
1276
1277 static char * __init build_full_name(struct device_node *dp)
1278 {
1279         int len, ourlen, plen;
1280         char *n;
1281
1282         plen = strlen(dp->parent->full_name);
1283         ourlen = strlen(dp->path_component_name);
1284         len = ourlen + plen + 2;
1285
1286         n = prom_early_alloc(len);
1287         strcpy(n, dp->parent->full_name);
1288         if (!is_root_node(dp->parent)) {
1289                 strcpy(n + plen, "/");
1290                 plen++;
1291         }
1292         strcpy(n + plen, dp->path_component_name);
1293
1294         return n;
1295 }
1296
1297 static unsigned int unique_id;
1298
1299 static struct property * __init build_one_prop(phandle node, char *prev, char *special_name, void *special_val, int special_len)
1300 {
1301         static struct property *tmp = NULL;
1302         struct property *p;
1303
1304         if (tmp) {
1305                 p = tmp;
1306                 memset(p, 0, sizeof(*p) + 32);
1307                 tmp = NULL;
1308         } else {
1309                 p = prom_early_alloc(sizeof(struct property) + 32);
1310                 p->unique_id = unique_id++;
1311         }
1312
1313         p->name = (char *) (p + 1);
1314         if (special_name) {
1315                 strcpy(p->name, special_name);
1316                 p->length = special_len;
1317                 p->value = prom_early_alloc(special_len);
1318                 memcpy(p->value, special_val, special_len);
1319         } else {
1320                 if (prev == NULL) {
1321                         prom_firstprop(node, p->name);
1322                 } else {
1323                         prom_nextprop(node, prev, p->name);
1324                 }
1325                 if (strlen(p->name) == 0) {
1326                         tmp = p;
1327                         return NULL;
1328                 }
1329                 p->length = prom_getproplen(node, p->name);
1330                 if (p->length <= 0) {
1331                         p->length = 0;
1332                 } else {
1333                         p->value = prom_early_alloc(p->length + 1);
1334                         prom_getproperty(node, p->name, p->value, p->length);
1335                         ((unsigned char *)p->value)[p->length] = '\0';
1336                 }
1337         }
1338         return p;
1339 }
1340
1341 static struct property * __init build_prop_list(phandle node)
1342 {
1343         struct property *head, *tail;
1344
1345         head = tail = build_one_prop(node, NULL,
1346                                      ".node", &node, sizeof(node));
1347
1348         tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
1349         tail = tail->next;
1350         while(tail) {
1351                 tail->next = build_one_prop(node, tail->name,
1352                                             NULL, NULL, 0);
1353                 tail = tail->next;
1354         }
1355
1356         return head;
1357 }
1358
1359 static char * __init get_one_property(phandle node, const char *name)
1360 {
1361         char *buf = "<NULL>";
1362         int len;
1363
1364         len = prom_getproplen(node, name);
1365         if (len > 0) {
1366                 buf = prom_early_alloc(len);
1367                 prom_getproperty(node, name, buf, len);
1368         }
1369
1370         return buf;
1371 }
1372
1373 static struct device_node * __init create_node(phandle node, struct device_node *parent)
1374 {
1375         struct device_node *dp;
1376
1377         if (!node)
1378                 return NULL;
1379
1380         dp = prom_early_alloc(sizeof(*dp));
1381         dp->unique_id = unique_id++;
1382         dp->parent = parent;
1383
1384         kref_init(&dp->kref);
1385
1386         dp->name = get_one_property(node, "name");
1387         dp->type = get_one_property(node, "device_type");
1388         dp->node = node;
1389
1390         dp->properties = build_prop_list(node);
1391
1392         irq_trans_init(dp);
1393
1394         return dp;
1395 }
1396
1397 static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
1398 {
1399         struct device_node *ret = NULL, *prev_sibling = NULL;
1400         struct device_node *dp;
1401
1402         while (1) {
1403                 dp = create_node(node, parent);
1404                 if (!dp)
1405                         break;
1406
1407                 if (prev_sibling)
1408                         prev_sibling->sibling = dp;
1409
1410                 if (!ret)
1411                         ret = dp;
1412                 prev_sibling = dp;
1413
1414                 *(*nextp) = dp;
1415                 *nextp = &dp->allnext;
1416
1417                 dp->path_component_name = build_path_component(dp);
1418                 dp->full_name = build_full_name(dp);
1419
1420                 dp->child = build_tree(dp, prom_getchild(node), nextp);
1421
1422                 node = prom_getsibling(node);
1423         }
1424
1425         return ret;
1426 }
1427
1428 static const char *get_mid_prop(void)
1429 {
1430         return (tlb_type == spitfire ? "upa-portid" : "portid");
1431 }
1432
1433 struct device_node *of_find_node_by_cpuid(int cpuid)
1434 {
1435         struct device_node *dp;
1436         const char *mid_prop = get_mid_prop();
1437
1438         for_each_node_by_type(dp, "cpu") {
1439                 int id = of_getintprop_default(dp, mid_prop, -1);
1440                 const char *this_mid_prop = mid_prop;
1441
1442                 if (id < 0) {
1443                         this_mid_prop = "cpuid";
1444                         id = of_getintprop_default(dp, this_mid_prop, -1);
1445                 }
1446
1447                 if (id < 0) {
1448                         prom_printf("OF: Serious problem, cpu lacks "
1449                                     "%s property", this_mid_prop);
1450                         prom_halt();
1451                 }
1452                 if (cpuid == id)
1453                         return dp;
1454         }
1455         return NULL;
1456 }
1457
1458 static void __init of_fill_in_cpu_data(void)
1459 {
1460         struct device_node *dp;
1461         const char *mid_prop = get_mid_prop();
1462
1463         ncpus_probed = 0;
1464         for_each_node_by_type(dp, "cpu") {
1465                 int cpuid = of_getintprop_default(dp, mid_prop, -1);
1466                 const char *this_mid_prop = mid_prop;
1467                 struct device_node *portid_parent;
1468                 int portid = -1;
1469
1470                 portid_parent = NULL;
1471                 if (cpuid < 0) {
1472                         this_mid_prop = "cpuid";
1473                         cpuid = of_getintprop_default(dp, this_mid_prop, -1);
1474                         if (cpuid >= 0) {
1475                                 int limit = 2;
1476
1477                                 portid_parent = dp;
1478                                 while (limit--) {
1479                                         portid_parent = portid_parent->parent;
1480                                         if (!portid_parent)
1481                                                 break;
1482                                         portid = of_getintprop_default(portid_parent,
1483                                                                        "portid", -1);
1484                                         if (portid >= 0)
1485                                                 break;
1486                                 }
1487                         }
1488                 }
1489
1490                 if (cpuid < 0) {
1491                         prom_printf("OF: Serious problem, cpu lacks "
1492                                     "%s property", this_mid_prop);
1493                         prom_halt();
1494                 }
1495
1496                 ncpus_probed++;
1497
1498 #ifdef CONFIG_SMP
1499                 if (cpuid >= NR_CPUS) {
1500                         printk(KERN_WARNING "Ignoring CPU %d which is "
1501                                ">= NR_CPUS (%d)\n",
1502                                cpuid, NR_CPUS);
1503                         continue;
1504                 }
1505 #else
1506                 /* On uniprocessor we only want the values for the
1507                  * real physical cpu the kernel booted onto, however
1508                  * cpu_data() only has one entry at index 0.
1509                  */
1510                 if (cpuid != real_hard_smp_processor_id())
1511                         continue;
1512                 cpuid = 0;
1513 #endif
1514
1515                 cpu_data(cpuid).clock_tick =
1516                         of_getintprop_default(dp, "clock-frequency", 0);
1517
1518                 if (portid_parent) {
1519                         cpu_data(cpuid).dcache_size =
1520                                 of_getintprop_default(dp, "l1-dcache-size",
1521                                                       16 * 1024);
1522                         cpu_data(cpuid).dcache_line_size =
1523                                 of_getintprop_default(dp, "l1-dcache-line-size",
1524                                                       32);
1525                         cpu_data(cpuid).icache_size =
1526                                 of_getintprop_default(dp, "l1-icache-size",
1527                                                       8 * 1024);
1528                         cpu_data(cpuid).icache_line_size =
1529                                 of_getintprop_default(dp, "l1-icache-line-size",
1530                                                       32);
1531                         cpu_data(cpuid).ecache_size =
1532                                 of_getintprop_default(dp, "l2-cache-size", 0);
1533                         cpu_data(cpuid).ecache_line_size =
1534                                 of_getintprop_default(dp, "l2-cache-line-size", 0);
1535                         if (!cpu_data(cpuid).ecache_size ||
1536                             !cpu_data(cpuid).ecache_line_size) {
1537                                 cpu_data(cpuid).ecache_size =
1538                                         of_getintprop_default(portid_parent,
1539                                                               "l2-cache-size",
1540                                                               (4 * 1024 * 1024));
1541                                 cpu_data(cpuid).ecache_line_size =
1542                                         of_getintprop_default(portid_parent,
1543                                                               "l2-cache-line-size", 64);
1544                         }
1545
1546                         cpu_data(cpuid).core_id = portid + 1;
1547                         cpu_data(cpuid).proc_id = portid;
1548 #ifdef CONFIG_SMP
1549                         sparc64_multi_core = 1;
1550 #endif
1551                 } else {
1552                         cpu_data(cpuid).dcache_size =
1553                                 of_getintprop_default(dp, "dcache-size", 16 * 1024);
1554                         cpu_data(cpuid).dcache_line_size =
1555                                 of_getintprop_default(dp, "dcache-line-size", 32);
1556
1557                         cpu_data(cpuid).icache_size =
1558                                 of_getintprop_default(dp, "icache-size", 16 * 1024);
1559                         cpu_data(cpuid).icache_line_size =
1560                                 of_getintprop_default(dp, "icache-line-size", 32);
1561
1562                         cpu_data(cpuid).ecache_size =
1563                                 of_getintprop_default(dp, "ecache-size",
1564                                                       (4 * 1024 * 1024));
1565                         cpu_data(cpuid).ecache_line_size =
1566                                 of_getintprop_default(dp, "ecache-line-size", 64);
1567
1568                         cpu_data(cpuid).core_id = 0;
1569                         cpu_data(cpuid).proc_id = -1;
1570                 }
1571
1572 #ifdef CONFIG_SMP
1573                 cpu_set(cpuid, cpu_present_map);
1574                 cpu_set(cpuid, cpu_possible_map);
1575 #endif
1576         }
1577
1578         smp_fill_in_sib_core_maps();
1579 }
1580
1581 struct device_node *of_console_device;
1582 EXPORT_SYMBOL(of_console_device);
1583
1584 char *of_console_path;
1585 EXPORT_SYMBOL(of_console_path);
1586
1587 char *of_console_options;
1588 EXPORT_SYMBOL(of_console_options);
1589
1590 static void __init of_console_init(void)
1591 {
1592         char *msg = "OF stdout device is: %s\n";
1593         struct device_node *dp;
1594         const char *type;
1595         phandle node;
1596
1597         of_console_path = prom_early_alloc(256);
1598         if (prom_ihandle2path(prom_stdout, of_console_path, 256) < 0) {
1599                 prom_printf("Cannot obtain path of stdout.\n");
1600                 prom_halt();
1601         }
1602         of_console_options = strrchr(of_console_path, ':');
1603         if (of_console_options) {
1604                 of_console_options++;
1605                 if (*of_console_options == '\0')
1606                         of_console_options = NULL;
1607         }
1608
1609         node = prom_inst2pkg(prom_stdout);
1610         if (!node) {
1611                 prom_printf("Cannot resolve stdout node from "
1612                             "instance %08x.\n", prom_stdout);
1613                 prom_halt();
1614         }
1615
1616         dp = of_find_node_by_phandle(node);
1617         type = of_get_property(dp, "device_type", NULL);
1618         if (!type) {
1619                 prom_printf("Console stdout lacks device_type property.\n");
1620                 prom_halt();
1621         }
1622
1623         if (strcmp(type, "display") && strcmp(type, "serial")) {
1624                 prom_printf("Console device_type is neither display "
1625                             "nor serial.\n");
1626                 prom_halt();
1627         }
1628
1629         of_console_device = dp;
1630
1631         printk(msg, of_console_path);
1632 }
1633
1634 void __init prom_build_devicetree(void)
1635 {
1636         struct device_node **nextp;
1637
1638         allnodes = create_node(prom_root_node, NULL);
1639         allnodes->path_component_name = "";
1640         allnodes->full_name = "/";
1641
1642         nextp = &allnodes->allnext;
1643         allnodes->child = build_tree(allnodes,
1644                                      prom_getchild(allnodes->node),
1645                                      &nextp);
1646         of_console_init();
1647
1648         printk("PROM: Built device tree with %u bytes of memory.\n",
1649                prom_early_allocated);
1650
1651         if (tlb_type != hypervisor)
1652                 of_fill_in_cpu_data();
1653 }