arch/sparc/kernel/prom_irqtrans.c

   1 #include <linux/kernel.h>
   2 #include <linux/string.h>
   3 #include <linux/init.h>
   4 #include <linux/of.h>
   5 #include <linux/of_platform.h>
   6
   7 #include <asm/oplib.h>
   8 #include <asm/prom.h>
   9 #include <asm/irq.h>
  10 #include <asm/upa.h>
  11
  12 #include "prom.h"
  13
  14 #ifdef CONFIG_PCI
  15 /* PSYCHO interrupt mapping support. */
  16 #define PSYCHO_IMAP_A_SLOT0     0x0c00UL
  17 #define PSYCHO_IMAP_B_SLOT0     0x0c20UL
  18 static unsigned long psycho_pcislot_imap_offset(unsigned long ino)
  19 {
  20         unsigned int bus =  (ino & 0x10) >> 4;
  21         unsigned int slot = (ino & 0x0c) >> 2;
  22
  23         if (bus == 0)
  24                 return PSYCHO_IMAP_A_SLOT0 + (slot * 8);
  25         else
  26                 return PSYCHO_IMAP_B_SLOT0 + (slot * 8);
  27 }
  28
  29 #define PSYCHO_OBIO_IMAP_BASE   0x1000UL
  30
  31 #define PSYCHO_ONBOARD_IRQ_BASE         0x20
  32 #define psycho_onboard_imap_offset(__ino) \
  33         (PSYCHO_OBIO_IMAP_BASE + (((__ino) & 0x1f) << 3))
  34
  35 #define PSYCHO_ICLR_A_SLOT0     0x1400UL
  36 #define PSYCHO_ICLR_SCSI        0x1800UL
  37
  38 #define psycho_iclr_offset(ino)                                       \
  39         ((ino & 0x20) ? (PSYCHO_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
  40                         (PSYCHO_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
  41
  42 static unsigned int psycho_irq_build(struct device_node *dp,
  43                                      unsigned int ino,
  44                                      void *_data)
  45 {
  46         unsigned long controller_regs = (unsigned long) _data;
  47         unsigned long imap, iclr;
  48         unsigned long imap_off, iclr_off;
  49         int inofixup = 0;
  50
  51         ino &= 0x3f;
  52         if (ino < PSYCHO_ONBOARD_IRQ_BASE) {
  53                 /* PCI slot */
  54                 imap_off = psycho_pcislot_imap_offset(ino);
  55         } else {
  56                 /* Onboard device */
  57                 imap_off = psycho_onboard_imap_offset(ino);
  58         }
  59
  60         /* Now build the IRQ bucket. */
  61         imap = controller_regs + imap_off;
  62
  63         iclr_off = psycho_iclr_offset(ino);
  64         iclr = controller_regs + iclr_off;
  65
  66         if ((ino & 0x20) == 0)
  67                 inofixup = ino & 0x03;
  68
  69         return build_irq(inofixup, iclr, imap);
  70 }
  71
  72 static void __init psycho_irq_trans_init(struct device_node *dp)
  73 {
  74         const struct linux_prom64_registers *regs;
  75
  76         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
  77         dp->irq_trans->irq_build = psycho_irq_build;
  78
  79         regs = of_get_property(dp, "reg", NULL);
  80         dp->irq_trans->data = (void *) regs[2].phys_addr;
  81 }
  82
  83 #define sabre_read(__reg) \
  84 ({      u64 __ret; \
  85         __asm__ __volatile__("ldxa [%1] %2, %0" \
  86                              : "=r" (__ret) \
  87                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
  88                              : "memory"); \
  89         __ret; \
  90 })
  91
  92 struct sabre_irq_data {
  93         unsigned long controller_regs;
  94         unsigned int pci_first_busno;
  95 };
  96 #define SABRE_CONFIGSPACE       0x001000000UL
  97 #define SABRE_WRSYNC            0x1c20UL
  98
  99 #define SABRE_CONFIG_BASE(CONFIG_SPACE) \
 100         (CONFIG_SPACE | (1UL << 24))
 101 #define SABRE_CONFIG_ENCODE(BUS, DEVFN, REG)    \
 102         (((unsigned long)(BUS)   << 16) |       \
 103          ((unsigned long)(DEVFN) << 8)  |       \
 104          ((unsigned long)(REG)))
 105
 106 /* When a device lives behind a bridge deeper in the PCI bus topology
 107  * than APB, a special sequence must run to make sure all pending DMA
 108  * transfers at the time of IRQ delivery are visible in the coherency
 109  * domain by the cpu.  This sequence is to perform a read on the far
 110  * side of the non-APB bridge, then perform a read of Sabre's DMA
 111  * write-sync register.
 112  */
 113 static void sabre_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 114 {
 115         unsigned int phys_hi = (unsigned int) (unsigned long) _arg1;
 116         struct sabre_irq_data *irq_data = _arg2;
 117         unsigned long controller_regs = irq_data->controller_regs;
 118         unsigned long sync_reg = controller_regs + SABRE_WRSYNC;
 119         unsigned long config_space = controller_regs + SABRE_CONFIGSPACE;
 120         unsigned int bus, devfn;
 121         u16 _unused;
 122
 123         config_space = SABRE_CONFIG_BASE(config_space);
 124
 125         bus = (phys_hi >> 16) & 0xff;
 126         devfn = (phys_hi >> 8) & 0xff;
 127
 128         config_space |= SABRE_CONFIG_ENCODE(bus, devfn, 0x00);
 129
 130         __asm__ __volatile__("membar #Sync\n\t"
 131                              "lduha [%1] %2, %0\n\t"
 132                              "membar #Sync"
 133                              : "=r" (_unused)
 134                              : "r" ((u16 *) config_space),
 135                                "i" (ASI_PHYS_BYPASS_EC_E_L)
 136                              : "memory");
 137
 138         sabre_read(sync_reg);
 139 }
 140
 141 #define SABRE_IMAP_A_SLOT0      0x0c00UL
 142 #define SABRE_IMAP_B_SLOT0      0x0c20UL
 143 #define SABRE_ICLR_A_SLOT0      0x1400UL
 144 #define SABRE_ICLR_B_SLOT0      0x1480UL
 145 #define SABRE_ICLR_SCSI         0x1800UL
 146 #define SABRE_ICLR_ETH          0x1808UL
 147 #define SABRE_ICLR_BPP          0x1810UL
 148 #define SABRE_ICLR_AU_REC       0x1818UL
 149 #define SABRE_ICLR_AU_PLAY      0x1820UL
 150 #define SABRE_ICLR_PFAIL        0x1828UL
 151 #define SABRE_ICLR_KMS          0x1830UL
 152 #define SABRE_ICLR_FLPY         0x1838UL
 153 #define SABRE_ICLR_SHW          0x1840UL
 154 #define SABRE_ICLR_KBD          0x1848UL
 155 #define SABRE_ICLR_MS           0x1850UL
 156 #define SABRE_ICLR_SER          0x1858UL
 157 #define SABRE_ICLR_UE           0x1870UL
 158 #define SABRE_ICLR_CE           0x1878UL
 159 #define SABRE_ICLR_PCIERR       0x1880UL
 160
 161 static unsigned long sabre_pcislot_imap_offset(unsigned long ino)
 162 {
 163         unsigned int bus =  (ino & 0x10) >> 4;
 164         unsigned int slot = (ino & 0x0c) >> 2;
 165
 166         if (bus == 0)
 167                 return SABRE_IMAP_A_SLOT0 + (slot * 8);
 168         else
 169                 return SABRE_IMAP_B_SLOT0 + (slot * 8);
 170 }
 171
 172 #define SABRE_OBIO_IMAP_BASE    0x1000UL
 173 #define SABRE_ONBOARD_IRQ_BASE  0x20
 174 #define sabre_onboard_imap_offset(__ino) \
 175         (SABRE_OBIO_IMAP_BASE + (((__ino) & 0x1f) << 3))
 176
 177 #define sabre_iclr_offset(ino)                                        \
 178         ((ino & 0x20) ? (SABRE_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
 179                         (SABRE_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
 180
 181 static int sabre_device_needs_wsync(struct device_node *dp)
 182 {
 183         struct device_node *parent = dp->parent;
 184         const char *parent_model, *parent_compat;
 185
 186         /* This traversal up towards the root is meant to
 187          * handle two cases:
 188          *
 189          * 1) non-PCI bus sitting under PCI, such as 'ebus'
 190          * 2) the PCI controller interrupts themselves, which
 191          *    will use the sabre_irq_build but do not need
 192          *    the DMA synchronization handling
 193          */
 194         while (parent) {
 195                 if (!strcmp(parent->type, "pci"))
 196                         break;
 197                 parent = parent->parent;
 198         }
 199
 200         if (!parent)
 201                 return 0;
 202
 203         parent_model = of_get_property(parent,
 204                                        "model", NULL);
 205         if (parent_model &&
 206             (!strcmp(parent_model, "SUNW,sabre") ||
 207              !strcmp(parent_model, "SUNW,simba")))
 208                 return 0;
 209
 210         parent_compat = of_get_property(parent,
 211                                         "compatible", NULL);
 212         if (parent_compat &&
 213             (!strcmp(parent_compat, "pci108e,a000") ||
 214              !strcmp(parent_compat, "pci108e,a001")))
 215                 return 0;
 216
 217         return 1;
 218 }
 219
 220 static unsigned int sabre_irq_build(struct device_node *dp,
 221                                     unsigned int ino,
 222                                     void *_data)
 223 {
 224         struct sabre_irq_data *irq_data = _data;
 225         unsigned long controller_regs = irq_data->controller_regs;
 226         const struct linux_prom_pci_registers *regs;
 227         unsigned long imap, iclr;
 228         unsigned long imap_off, iclr_off;
 229         int inofixup = 0;
 230         int irq;
 231
 232         ino &= 0x3f;
 233         if (ino < SABRE_ONBOARD_IRQ_BASE) {
 234                 /* PCI slot */
 235                 imap_off = sabre_pcislot_imap_offset(ino);
 236         } else {
 237                 /* onboard device */
 238                 imap_off = sabre_onboard_imap_offset(ino);
 239         }
 240
 241         /* Now build the IRQ bucket. */
 242         imap = controller_regs + imap_off;
 243
 244         iclr_off = sabre_iclr_offset(ino);
 245         iclr = controller_regs + iclr_off;
 246
 247         if ((ino & 0x20) == 0)
 248                 inofixup = ino & 0x03;
 249
 250         irq = build_irq(inofixup, iclr, imap);
 251
 252         /* If the parent device is a PCI<->PCI bridge other than
 253          * APB, we have to install a pre-handler to ensure that
 254          * all pending DMA is drained before the interrupt handler
 255          * is run.
 256          */
 257         regs = of_get_property(dp, "reg", NULL);
 258         if (regs && sabre_device_needs_wsync(dp)) {
 259                 irq_install_pre_handler(irq,
 260                                         sabre_wsync_handler,
 261                                         (void *) (long) regs->phys_hi,
 262                                         (void *) irq_data);
 263         }
 264
 265         return irq;
 266 }
 267
 268 static void __init sabre_irq_trans_init(struct device_node *dp)
 269 {
 270         const struct linux_prom64_registers *regs;
 271         struct sabre_irq_data *irq_data;
 272         const u32 *busrange;
 273
 274         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 275         dp->irq_trans->irq_build = sabre_irq_build;
 276
 277         irq_data = prom_early_alloc(sizeof(struct sabre_irq_data));
 278
 279         regs = of_get_property(dp, "reg", NULL);
 280         irq_data->controller_regs = regs[0].phys_addr;
 281
 282         busrange = of_get_property(dp, "bus-range", NULL);
 283         irq_data->pci_first_busno = busrange[0];
 284
 285         dp->irq_trans->data = irq_data;
 286 }
 287
 288 /* SCHIZO interrupt mapping support.  Unlike Psycho, for this controller the
 289  * imap/iclr registers are per-PBM.
 290  */
 291 #define SCHIZO_IMAP_BASE        0x1000UL
 292 #define SCHIZO_ICLR_BASE        0x1400UL
 293
 294 static unsigned long schizo_imap_offset(unsigned long ino)
 295 {
 296         return SCHIZO_IMAP_BASE + (ino * 8UL);
 297 }
 298
 299 static unsigned long schizo_iclr_offset(unsigned long ino)
 300 {
 301         return SCHIZO_ICLR_BASE + (ino * 8UL);
 302 }
 303
 304 static unsigned long schizo_ino_to_iclr(unsigned long pbm_regs,
 305                                         unsigned int ino)
 306 {
 307
 308         return pbm_regs + schizo_iclr_offset(ino);
 309 }
 310
 311 static unsigned long schizo_ino_to_imap(unsigned long pbm_regs,
 312                                         unsigned int ino)
 313 {
 314         return pbm_regs + schizo_imap_offset(ino);
 315 }
 316
 317 #define schizo_read(__reg) \
 318 ({      u64 __ret; \
 319         __asm__ __volatile__("ldxa [%1] %2, %0" \
 320                              : "=r" (__ret) \
 321                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
 322                              : "memory"); \
 323         __ret; \
 324 })
 325 #define schizo_write(__reg, __val) \
 326         __asm__ __volatile__("stxa %0, [%1] %2" \
 327                              : /* no outputs */ \
 328                              : "r" (__val), "r" (__reg), \
 329                                "i" (ASI_PHYS_BYPASS_EC_E) \
 330                              : "memory")
 331
 332 static void tomatillo_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 333 {
 334         unsigned long sync_reg = (unsigned long) _arg2;
 335         u64 mask = 1UL << (ino & IMAP_INO);
 336         u64 val;
 337         int limit;
 338
 339         schizo_write(sync_reg, mask);
 340
 341         limit = 100000;
 342         val = 0;
 343         while (--limit) {
 344                 val = schizo_read(sync_reg);
 345                 if (!(val & mask))
 346                         break;
 347         }
 348         if (limit <= 0) {
 349                 printk("tomatillo_wsync_handler: DMA won't sync [%llx:%llx]\n",
 350                        val, mask);
 351         }
 352
 353         if (_arg1) {
 354                 static unsigned char cacheline[64]
 355                         __attribute__ ((aligned (64)));
 356
 357                 __asm__ __volatile__("rd %%fprs, %0\n\t"
 358                                      "or %0, %4, %1\n\t"
 359                                      "wr %1, 0x0, %%fprs\n\t"
 360                                      "stda %%f0, [%5] %6\n\t"
 361                                      "wr %0, 0x0, %%fprs\n\t"
 362                                      "membar #Sync"
 363                                      : "=&r" (mask), "=&r" (val)
 364                                      : "0" (mask), "1" (val),
 365                                      "i" (FPRS_FEF), "r" (&cacheline[0]),
 366                                      "i" (ASI_BLK_COMMIT_P));
 367         }
 368 }
 369
 370 struct schizo_irq_data {
 371         unsigned long pbm_regs;
 372         unsigned long sync_reg;
 373         u32 portid;
 374         int chip_version;
 375 };
 376
 377 static unsigned int schizo_irq_build(struct device_node *dp,
 378                                      unsigned int ino,
 379                                      void *_data)
 380 {
 381         struct schizo_irq_data *irq_data = _data;
 382         unsigned long pbm_regs = irq_data->pbm_regs;
 383         unsigned long imap, iclr;
 384         int ign_fixup;
 385         int irq;
 386         int is_tomatillo;
 387
 388         ino &= 0x3f;
 389
 390         /* Now build the IRQ bucket. */
 391         imap = schizo_ino_to_imap(pbm_regs, ino);
 392         iclr = schizo_ino_to_iclr(pbm_regs, ino);
 393
 394         /* On Schizo, no inofixup occurs.  This is because each
 395          * INO has it's own IMAP register.  On Psycho and Sabre
 396          * there is only one IMAP register for each PCI slot even
 397          * though four different INOs can be generated by each
 398          * PCI slot.
 399          *
 400          * But, for JBUS variants (essentially, Tomatillo), we have
 401          * to fixup the lowest bit of the interrupt group number.
 402          */
 403         ign_fixup = 0;
 404
 405         is_tomatillo = (irq_data->sync_reg != 0UL);
 406
 407         if (is_tomatillo) {
 408                 if (irq_data->portid & 1)
 409                         ign_fixup = (1 << 6);
 410         }
 411
 412         irq = build_irq(ign_fixup, iclr, imap);
 413
 414         if (is_tomatillo) {
 415                 irq_install_pre_handler(irq,
 416                                         tomatillo_wsync_handler,
 417                                         ((irq_data->chip_version <= 4) ?
 418                                          (void *) 1 : (void *) 0),
 419                                         (void *) irq_data->sync_reg);
 420         }
 421
 422         return irq;
 423 }
 424
 425 static void __init __schizo_irq_trans_init(struct device_node *dp,
 426                                            int is_tomatillo)
 427 {
 428         const struct linux_prom64_registers *regs;
 429         struct schizo_irq_data *irq_data;
 430
 431         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 432         dp->irq_trans->irq_build = schizo_irq_build;
 433
 434         irq_data = prom_early_alloc(sizeof(struct schizo_irq_data));
 435
 436         regs = of_get_property(dp, "reg", NULL);
 437         dp->irq_trans->data = irq_data;
 438
 439         irq_data->pbm_regs = regs[0].phys_addr;
 440         if (is_tomatillo)
 441                 irq_data->sync_reg = regs[3].phys_addr + 0x1a18UL;
 442         else
 443                 irq_data->sync_reg = 0UL;
 444         irq_data->portid = of_getintprop_default(dp, "portid", 0);
 445         irq_data->chip_version = of_getintprop_default(dp, "version#", 0);
 446 }
 447
 448 static void __init schizo_irq_trans_init(struct device_node *dp)
 449 {
 450         __schizo_irq_trans_init(dp, 0);
 451 }
 452
 453 static void __init tomatillo_irq_trans_init(struct device_node *dp)
 454 {
 455         __schizo_irq_trans_init(dp, 1);
 456 }
 457
 458 static unsigned int pci_sun4v_irq_build(struct device_node *dp,
 459                                         unsigned int devino,
 460                                         void *_data)
 461 {
 462         u32 devhandle = (u32) (unsigned long) _data;
 463
 464         return sun4v_build_irq(devhandle, devino);
 465 }
 466
 467 static void __init pci_sun4v_irq_trans_init(struct device_node *dp)
 468 {
 469         const struct linux_prom64_registers *regs;
 470
 471         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 472         dp->irq_trans->irq_build = pci_sun4v_irq_build;
 473
 474         regs = of_get_property(dp, "reg", NULL);
 475         dp->irq_trans->data = (void *) (unsigned long)
 476                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
 477 }
 478
 479 struct fire_irq_data {
 480         unsigned long pbm_regs;
 481         u32 portid;
 482 };
 483
 484 #define FIRE_IMAP_BASE  0x001000
 485 #define FIRE_ICLR_BASE  0x001400
 486
 487 static unsigned long fire_imap_offset(unsigned long ino)
 488 {
 489         return FIRE_IMAP_BASE + (ino * 8UL);
 490 }
 491
 492 static unsigned long fire_iclr_offset(unsigned long ino)
 493 {
 494         return FIRE_ICLR_BASE + (ino * 8UL);
 495 }
 496
 497 static unsigned long fire_ino_to_iclr(unsigned long pbm_regs,
 498                                             unsigned int ino)
 499 {
 500         return pbm_regs + fire_iclr_offset(ino);
 501 }
 502
 503 static unsigned long fire_ino_to_imap(unsigned long pbm_regs,
 504                                             unsigned int ino)
 505 {
 506         return pbm_regs + fire_imap_offset(ino);
 507 }
 508
 509 static unsigned int fire_irq_build(struct device_node *dp,
 510                                          unsigned int ino,
 511                                          void *_data)
 512 {
 513         struct fire_irq_data *irq_data = _data;
 514         unsigned long pbm_regs = irq_data->pbm_regs;
 515         unsigned long imap, iclr;
 516         unsigned long int_ctrlr;
 517
 518         ino &= 0x3f;
 519
 520         /* Now build the IRQ bucket. */
 521         imap = fire_ino_to_imap(pbm_regs, ino);
 522         iclr = fire_ino_to_iclr(pbm_regs, ino);
 523
 524         /* Set the interrupt controller number.  */
 525         int_ctrlr = 1 << 6;
 526         upa_writeq(int_ctrlr, imap);
 527
 528         /* The interrupt map registers do not have an INO field
 529          * like other chips do.  They return zero in the INO
 530          * field, and the interrupt controller number is controlled
 531          * in bits 6 to 9.  So in order for build_irq() to get
 532          * the INO right we pass it in as part of the fixup
 533          * which will get added to the map register zero value
 534          * read by build_irq().
 535          */
 536         ino |= (irq_data->portid << 6);
 537         ino -= int_ctrlr;
 538         return build_irq(ino, iclr, imap);
 539 }
 540
 541 static void __init fire_irq_trans_init(struct device_node *dp)
 542 {
 543         const struct linux_prom64_registers *regs;
 544         struct fire_irq_data *irq_data;
 545
 546         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 547         dp->irq_trans->irq_build = fire_irq_build;
 548
 549         irq_data = prom_early_alloc(sizeof(struct fire_irq_data));
 550
 551         regs = of_get_property(dp, "reg", NULL);
 552         dp->irq_trans->data = irq_data;
 553
 554         irq_data->pbm_regs = regs[0].phys_addr;
 555         irq_data->portid = of_getintprop_default(dp, "portid", 0);
 556 }
 557 #endif /* CONFIG_PCI */
 558
 559 #ifdef CONFIG_SBUS
 560 /* INO number to IMAP register offset for SYSIO external IRQ's.
 561  * This should conform to both Sunfire/Wildfire server and Fusion
 562  * desktop designs.
 563  */
 564 #define SYSIO_IMAP_SLOT0        0x2c00UL
 565 #define SYSIO_IMAP_SLOT1        0x2c08UL
 566 #define SYSIO_IMAP_SLOT2        0x2c10UL
 567 #define SYSIO_IMAP_SLOT3        0x2c18UL
 568 #define SYSIO_IMAP_SCSI         0x3000UL
 569 #define SYSIO_IMAP_ETH          0x3008UL
 570 #define SYSIO_IMAP_BPP          0x3010UL
 571 #define SYSIO_IMAP_AUDIO        0x3018UL
 572 #define SYSIO_IMAP_PFAIL        0x3020UL
 573 #define SYSIO_IMAP_KMS          0x3028UL
 574 #define SYSIO_IMAP_FLPY         0x3030UL
 575 #define SYSIO_IMAP_SHW          0x3038UL
 576 #define SYSIO_IMAP_KBD          0x3040UL
 577 #define SYSIO_IMAP_MS           0x3048UL
 578 #define SYSIO_IMAP_SER          0x3050UL
 579 #define SYSIO_IMAP_TIM0         0x3060UL
 580 #define SYSIO_IMAP_TIM1         0x3068UL
 581 #define SYSIO_IMAP_UE           0x3070UL
 582 #define SYSIO_IMAP_CE           0x3078UL
 583 #define SYSIO_IMAP_SBERR        0x3080UL
 584 #define SYSIO_IMAP_PMGMT        0x3088UL
 585 #define SYSIO_IMAP_GFX          0x3090UL
 586 #define SYSIO_IMAP_EUPA         0x3098UL
 587
 588 #define bogon     ((unsigned long) -1)
 589 static unsigned long sysio_irq_offsets[] = {
 590         /* SBUS Slot 0 --> 3, level 1 --> 7 */
 591         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 592         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
 593         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 594         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
 595         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 596         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
 597         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 598         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
 599
 600         /* Onboard devices (not relevant/used on SunFire). */
 601         SYSIO_IMAP_SCSI,
 602         SYSIO_IMAP_ETH,
 603         SYSIO_IMAP_BPP,
 604         bogon,
 605         SYSIO_IMAP_AUDIO,
 606         SYSIO_IMAP_PFAIL,
 607         bogon,
 608         bogon,
 609         SYSIO_IMAP_KMS,
 610         SYSIO_IMAP_FLPY,
 611         SYSIO_IMAP_SHW,
 612         SYSIO_IMAP_KBD,
 613         SYSIO_IMAP_MS,
 614         SYSIO_IMAP_SER,
 615         bogon,
 616         bogon,
 617         SYSIO_IMAP_TIM0,
 618         SYSIO_IMAP_TIM1,
 619         bogon,
 620         bogon,
 621         SYSIO_IMAP_UE,
 622         SYSIO_IMAP_CE,
 623         SYSIO_IMAP_SBERR,
 624         SYSIO_IMAP_PMGMT,
 625         SYSIO_IMAP_GFX,
 626         SYSIO_IMAP_EUPA,
 627 };
 628
 629 #undef bogon
 630
 631 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
 632
 633 /* Convert Interrupt Mapping register pointer to associated
 634  * Interrupt Clear register pointer, SYSIO specific version.
 635  */
 636 #define SYSIO_ICLR_UNUSED0      0x3400UL
 637 #define SYSIO_ICLR_SLOT0        0x3408UL
 638 #define SYSIO_ICLR_SLOT1        0x3448UL
 639 #define SYSIO_ICLR_SLOT2        0x3488UL
 640 #define SYSIO_ICLR_SLOT3        0x34c8UL
 641 static unsigned long sysio_imap_to_iclr(unsigned long imap)
 642 {
 643         unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
 644         return imap + diff;
 645 }
 646
 647 static unsigned int sbus_of_build_irq(struct device_node *dp,
 648                                       unsigned int ino,
 649                                       void *_data)
 650 {
 651         unsigned long reg_base = (unsigned long) _data;
 652         const struct linux_prom_registers *regs;
 653         unsigned long imap, iclr;
 654         int sbus_slot = 0;
 655         int sbus_level = 0;
 656
 657         ino &= 0x3f;
 658
 659         regs = of_get_property(dp, "reg", NULL);
 660         if (regs)
 661                 sbus_slot = regs->which_io;
 662
 663         if (ino < 0x20)
 664                 ino += (sbus_slot * 8);
 665
 666         imap = sysio_irq_offsets[ino];
 667         if (imap == ((unsigned long)-1)) {
 668                 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
 669                             ino);
 670                 prom_halt();
 671         }
 672         imap += reg_base;
 673
 674         /* SYSIO inconsistency.  For external SLOTS, we have to select
 675          * the right ICLR register based upon the lower SBUS irq level
 676          * bits.
 677          */
 678         if (ino >= 0x20) {
 679                 iclr = sysio_imap_to_iclr(imap);
 680         } else {
 681                 sbus_level = ino & 0x7;
 682
 683                 switch(sbus_slot) {
 684                 case 0:
 685                         iclr = reg_base + SYSIO_ICLR_SLOT0;
 686                         break;
 687                 case 1:
 688                         iclr = reg_base + SYSIO_ICLR_SLOT1;
 689                         break;
 690                 case 2:
 691                         iclr = reg_base + SYSIO_ICLR_SLOT2;
 692                         break;
 693                 default:
 694                 case 3:
 695                         iclr = reg_base + SYSIO_ICLR_SLOT3;
 696                         break;
 697                 }
 698
 699                 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
 700         }
 701         return build_irq(sbus_level, iclr, imap);
 702 }
 703
 704 static void __init sbus_irq_trans_init(struct device_node *dp)
 705 {
 706         const struct linux_prom64_registers *regs;
 707
 708         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 709         dp->irq_trans->irq_build = sbus_of_build_irq;
 710
 711         regs = of_get_property(dp, "reg", NULL);
 712         dp->irq_trans->data = (void *) (unsigned long) regs->phys_addr;
 713 }
 714 #endif /* CONFIG_SBUS */
 715
 716
 717 static unsigned int central_build_irq(struct device_node *dp,
 718                                       unsigned int ino,
 719                                       void *_data)
 720 {
 721         struct device_node *central_dp = _data;
 722         struct platform_device *central_op = of_find_device_by_node(central_dp);
 723         struct resource *res;
 724         unsigned long imap, iclr;
 725         u32 tmp;
 726
 727         if (!strcmp(dp->name, "eeprom")) {
 728                 res = &central_op->resource[5];
 729         } else if (!strcmp(dp->name, "zs")) {
 730                 res = &central_op->resource[4];
 731         } else if (!strcmp(dp->name, "clock-board")) {
 732                 res = &central_op->resource[3];
 733         } else {
 734                 return ino;
 735         }
 736
 737         imap = res->start + 0x00UL;
 738         iclr = res->start + 0x10UL;
 739
 740         /* Set the INO state to idle, and disable.  */
 741         upa_writel(0, iclr);
 742         upa_readl(iclr);
 743
 744         tmp = upa_readl(imap);
 745         tmp &= ~0x80000000;
 746         upa_writel(tmp, imap);
 747
 748         return build_irq(0, iclr, imap);
 749 }
 750
 751 static void __init central_irq_trans_init(struct device_node *dp)
 752 {
 753         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 754         dp->irq_trans->irq_build = central_build_irq;
 755
 756         dp->irq_trans->data = dp;
 757 }
 758
 759 struct irq_trans {
 760         const char *name;
 761         void (*init)(struct device_node *);
 762 };
 763
 764 #ifdef CONFIG_PCI
 765 static struct irq_trans __initdata pci_irq_trans_table[] = {
 766         { "SUNW,sabre", sabre_irq_trans_init },
 767         { "pci108e,a000", sabre_irq_trans_init },
 768         { "pci108e,a001", sabre_irq_trans_init },
 769         { "SUNW,psycho", psycho_irq_trans_init },
 770         { "pci108e,8000", psycho_irq_trans_init },
 771         { "SUNW,schizo", schizo_irq_trans_init },
 772         { "pci108e,8001", schizo_irq_trans_init },
 773         { "SUNW,schizo+", schizo_irq_trans_init },
 774         { "pci108e,8002", schizo_irq_trans_init },
 775         { "SUNW,tomatillo", tomatillo_irq_trans_init },
 776         { "pci108e,a801", tomatillo_irq_trans_init },
 777         { "SUNW,sun4v-pci", pci_sun4v_irq_trans_init },
 778         { "pciex108e,80f0", fire_irq_trans_init },
 779 };
 780 #endif
 781
 782 static unsigned int sun4v_vdev_irq_build(struct device_node *dp,
 783                                          unsigned int devino,
 784                                          void *_data)
 785 {
 786         u32 devhandle = (u32) (unsigned long) _data;
 787
 788         return sun4v_build_irq(devhandle, devino);
 789 }
 790
 791 static void __init sun4v_vdev_irq_trans_init(struct device_node *dp)
 792 {
 793         const struct linux_prom64_registers *regs;
 794
 795         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
 796         dp->irq_trans->irq_build = sun4v_vdev_irq_build;
 797
 798         regs = of_get_property(dp, "reg", NULL);
 799         dp->irq_trans->data = (void *) (unsigned long)
 800                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
 801 }
 802
 803 void __init irq_trans_init(struct device_node *dp)
 804 {
 805 #ifdef CONFIG_PCI
 806         const char *model;
 807         int i;
 808 #endif
 809
 810 #ifdef CONFIG_PCI
 811         model = of_get_property(dp, "model", NULL);
 812         if (!model)
 813                 model = of_get_property(dp, "compatible", NULL);
 814         if (model) {
 815                 for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
 816                         struct irq_trans *t = &pci_irq_trans_table[i];
 817
 818                         if (!strcmp(model, t->name)) {
 819                                 t->init(dp);
 820                                 return;
 821                         }
 822                 }
 823         }
 824 #endif
 825 #ifdef CONFIG_SBUS
 826         if (!strcmp(dp->name, "sbus") ||
 827             !strcmp(dp->name, "sbi")) {
 828                 sbus_irq_trans_init(dp);
 829                 return;
 830         }
 831 #endif
 832         if (!strcmp(dp->name, "fhc") &&
 833             !strcmp(dp->parent->name, "central")) {
 834                 central_irq_trans_init(dp);
 835                 return;
 836         }
 837         if (!strcmp(dp->name, "virtual-devices") ||
 838             !strcmp(dp->name, "niu")) {
 839                 sun4v_vdev_irq_trans_init(dp);
 840                 return;
 841         }
 842 }