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[TIPC]: Removing useless casts
[linux-2.6.git] / arch / sparc64 / kernel / prom.c
1 /*
2  * Procedures for creating, accessing and interpreting the device tree.
3  *
4  * Paul Mackerras       August 1996.
5  * Copyright (C) 1996-2005 Paul Mackerras.
6  * 
7  *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
8  *    {engebret|bergner}@us.ibm.com 
9  *
10  *  Adapted for sparc64 by David S. Miller davem@davemloft.net
11  *
12  *      This program is free software; you can redistribute it and/or
13  *      modify it under the terms of the GNU General Public License
14  *      as published by the Free Software Foundation; either version
15  *      2 of the License, or (at your option) any later version.
16  */
17
18 #include <linux/config.h>
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/string.h>
22 #include <linux/mm.h>
23 #include <linux/bootmem.h>
24 #include <linux/module.h>
25
26 #include <asm/prom.h>
27 #include <asm/of_device.h>
28 #include <asm/oplib.h>
29 #include <asm/irq.h>
30 #include <asm/asi.h>
31 #include <asm/upa.h>
32
33 static struct device_node *allnodes;
34
35 /* use when traversing tree through the allnext, child, sibling,
36  * or parent members of struct device_node.
37  */
38 static DEFINE_RWLOCK(devtree_lock);
39
40 int of_device_is_compatible(struct device_node *device, const char *compat)
41 {
42         const char* cp;
43         int cplen, l;
44
45         cp = (char *) of_get_property(device, "compatible", &cplen);
46         if (cp == NULL)
47                 return 0;
48         while (cplen > 0) {
49                 if (strncmp(cp, compat, strlen(compat)) == 0)
50                         return 1;
51                 l = strlen(cp) + 1;
52                 cp += l;
53                 cplen -= l;
54         }
55
56         return 0;
57 }
58 EXPORT_SYMBOL(of_device_is_compatible);
59
60 struct device_node *of_get_parent(const struct device_node *node)
61 {
62         struct device_node *np;
63
64         if (!node)
65                 return NULL;
66
67         np = node->parent;
68
69         return np;
70 }
71 EXPORT_SYMBOL(of_get_parent);
72
73 struct device_node *of_get_next_child(const struct device_node *node,
74         struct device_node *prev)
75 {
76         struct device_node *next;
77
78         next = prev ? prev->sibling : node->child;
79         for (; next != 0; next = next->sibling) {
80                 break;
81         }
82
83         return next;
84 }
85 EXPORT_SYMBOL(of_get_next_child);
86
87 struct device_node *of_find_node_by_path(const char *path)
88 {
89         struct device_node *np = allnodes;
90
91         for (; np != 0; np = np->allnext) {
92                 if (np->full_name != 0 && strcmp(np->full_name, path) == 0)
93                         break;
94         }
95
96         return np;
97 }
98 EXPORT_SYMBOL(of_find_node_by_path);
99
100 struct device_node *of_find_node_by_phandle(phandle handle)
101 {
102         struct device_node *np;
103
104         for (np = allnodes; np != 0; np = np->allnext)
105                 if (np->node == handle)
106                         break;
107
108         return np;
109 }
110 EXPORT_SYMBOL(of_find_node_by_phandle);
111
112 struct device_node *of_find_node_by_name(struct device_node *from,
113         const char *name)
114 {
115         struct device_node *np;
116
117         np = from ? from->allnext : allnodes;
118         for (; np != NULL; np = np->allnext)
119                 if (np->name != NULL && strcmp(np->name, name) == 0)
120                         break;
121
122         return np;
123 }
124 EXPORT_SYMBOL(of_find_node_by_name);
125
126 struct device_node *of_find_node_by_type(struct device_node *from,
127         const char *type)
128 {
129         struct device_node *np;
130
131         np = from ? from->allnext : allnodes;
132         for (; np != 0; np = np->allnext)
133                 if (np->type != 0 && strcmp(np->type, type) == 0)
134                         break;
135
136         return np;
137 }
138 EXPORT_SYMBOL(of_find_node_by_type);
139
140 struct device_node *of_find_compatible_node(struct device_node *from,
141         const char *type, const char *compatible)
142 {
143         struct device_node *np;
144
145         np = from ? from->allnext : allnodes;
146         for (; np != 0; np = np->allnext) {
147                 if (type != NULL
148                     && !(np->type != 0 && strcmp(np->type, type) == 0))
149                         continue;
150                 if (of_device_is_compatible(np, compatible))
151                         break;
152         }
153
154         return np;
155 }
156 EXPORT_SYMBOL(of_find_compatible_node);
157
158 struct property *of_find_property(struct device_node *np, const char *name,
159                                   int *lenp)
160 {
161         struct property *pp;
162
163         for (pp = np->properties; pp != 0; pp = pp->next) {
164                 if (strcmp(pp->name, name) == 0) {
165                         if (lenp != 0)
166                                 *lenp = pp->length;
167                         break;
168                 }
169         }
170         return pp;
171 }
172 EXPORT_SYMBOL(of_find_property);
173
174 /*
175  * Find a property with a given name for a given node
176  * and return the value.
177  */
178 void *of_get_property(struct device_node *np, const char *name, int *lenp)
179 {
180         struct property *pp = of_find_property(np,name,lenp);
181         return pp ? pp->value : NULL;
182 }
183 EXPORT_SYMBOL(of_get_property);
184
185 int of_getintprop_default(struct device_node *np, const char *name, int def)
186 {
187         struct property *prop;
188         int len;
189
190         prop = of_find_property(np, name, &len);
191         if (!prop || len != 4)
192                 return def;
193
194         return *(int *) prop->value;
195 }
196 EXPORT_SYMBOL(of_getintprop_default);
197
198 int of_n_addr_cells(struct device_node *np)
199 {
200         int* ip;
201         do {
202                 if (np->parent)
203                         np = np->parent;
204                 ip = of_get_property(np, "#address-cells", NULL);
205                 if (ip != NULL)
206                         return *ip;
207         } while (np->parent);
208         /* No #address-cells property for the root node, default to 2 */
209         return 2;
210 }
211 EXPORT_SYMBOL(of_n_addr_cells);
212
213 int of_n_size_cells(struct device_node *np)
214 {
215         int* ip;
216         do {
217                 if (np->parent)
218                         np = np->parent;
219                 ip = of_get_property(np, "#size-cells", NULL);
220                 if (ip != NULL)
221                         return *ip;
222         } while (np->parent);
223         /* No #size-cells property for the root node, default to 1 */
224         return 1;
225 }
226 EXPORT_SYMBOL(of_n_size_cells);
227
228 int of_set_property(struct device_node *dp, const char *name, void *val, int len)
229 {
230         struct property **prevp;
231         void *new_val;
232         int err;
233
234         new_val = kmalloc(len, GFP_KERNEL);
235         if (!new_val)
236                 return -ENOMEM;
237
238         memcpy(new_val, val, len);
239
240         err = -ENODEV;
241
242         write_lock(&devtree_lock);
243         prevp = &dp->properties;
244         while (*prevp) {
245                 struct property *prop = *prevp;
246
247                 if (!strcmp(prop->name, name)) {
248                         void *old_val = prop->value;
249                         int ret;
250
251                         ret = prom_setprop(dp->node, name, val, len);
252                         err = -EINVAL;
253                         if (ret >= 0) {
254                                 prop->value = new_val;
255                                 prop->length = len;
256
257                                 if (OF_IS_DYNAMIC(prop))
258                                         kfree(old_val);
259
260                                 OF_MARK_DYNAMIC(prop);
261
262                                 err = 0;
263                         }
264                         break;
265                 }
266                 prevp = &(*prevp)->next;
267         }
268         write_unlock(&devtree_lock);
269
270         /* XXX Upate procfs if necessary... */
271
272         return err;
273 }
274 EXPORT_SYMBOL(of_set_property);
275
276 static unsigned int prom_early_allocated;
277
278 static void * __init prom_early_alloc(unsigned long size)
279 {
280         void *ret;
281
282         ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
283         if (ret != NULL)
284                 memset(ret, 0, size);
285
286         prom_early_allocated += size;
287
288         return ret;
289 }
290
291 #ifdef CONFIG_PCI
292 /* PSYCHO interrupt mapping support. */
293 #define PSYCHO_IMAP_A_SLOT0     0x0c00UL
294 #define PSYCHO_IMAP_B_SLOT0     0x0c20UL
295 static unsigned long psycho_pcislot_imap_offset(unsigned long ino)
296 {
297         unsigned int bus =  (ino & 0x10) >> 4;
298         unsigned int slot = (ino & 0x0c) >> 2;
299
300         if (bus == 0)
301                 return PSYCHO_IMAP_A_SLOT0 + (slot * 8);
302         else
303                 return PSYCHO_IMAP_B_SLOT0 + (slot * 8);
304 }
305
306 #define PSYCHO_IMAP_SCSI        0x1000UL
307 #define PSYCHO_IMAP_ETH         0x1008UL
308 #define PSYCHO_IMAP_BPP         0x1010UL
309 #define PSYCHO_IMAP_AU_REC      0x1018UL
310 #define PSYCHO_IMAP_AU_PLAY     0x1020UL
311 #define PSYCHO_IMAP_PFAIL       0x1028UL
312 #define PSYCHO_IMAP_KMS         0x1030UL
313 #define PSYCHO_IMAP_FLPY        0x1038UL
314 #define PSYCHO_IMAP_SHW         0x1040UL
315 #define PSYCHO_IMAP_KBD         0x1048UL
316 #define PSYCHO_IMAP_MS          0x1050UL
317 #define PSYCHO_IMAP_SER         0x1058UL
318 #define PSYCHO_IMAP_TIM0        0x1060UL
319 #define PSYCHO_IMAP_TIM1        0x1068UL
320 #define PSYCHO_IMAP_UE          0x1070UL
321 #define PSYCHO_IMAP_CE          0x1078UL
322 #define PSYCHO_IMAP_A_ERR       0x1080UL
323 #define PSYCHO_IMAP_B_ERR       0x1088UL
324 #define PSYCHO_IMAP_PMGMT       0x1090UL
325 #define PSYCHO_IMAP_GFX         0x1098UL
326 #define PSYCHO_IMAP_EUPA        0x10a0UL
327
328 static unsigned long __psycho_onboard_imap_off[] = {
329 /*0x20*/        PSYCHO_IMAP_SCSI,
330 /*0x21*/        PSYCHO_IMAP_ETH,
331 /*0x22*/        PSYCHO_IMAP_BPP,
332 /*0x23*/        PSYCHO_IMAP_AU_REC,
333 /*0x24*/        PSYCHO_IMAP_AU_PLAY,
334 /*0x25*/        PSYCHO_IMAP_PFAIL,
335 /*0x26*/        PSYCHO_IMAP_KMS,
336 /*0x27*/        PSYCHO_IMAP_FLPY,
337 /*0x28*/        PSYCHO_IMAP_SHW,
338 /*0x29*/        PSYCHO_IMAP_KBD,
339 /*0x2a*/        PSYCHO_IMAP_MS,
340 /*0x2b*/        PSYCHO_IMAP_SER,
341 /*0x2c*/        PSYCHO_IMAP_TIM0,
342 /*0x2d*/        PSYCHO_IMAP_TIM1,
343 /*0x2e*/        PSYCHO_IMAP_UE,
344 /*0x2f*/        PSYCHO_IMAP_CE,
345 /*0x30*/        PSYCHO_IMAP_A_ERR,
346 /*0x31*/        PSYCHO_IMAP_B_ERR,
347 /*0x32*/        PSYCHO_IMAP_PMGMT
348 };
349 #define PSYCHO_ONBOARD_IRQ_BASE         0x20
350 #define PSYCHO_ONBOARD_IRQ_LAST         0x32
351 #define psycho_onboard_imap_offset(__ino) \
352         __psycho_onboard_imap_off[(__ino) - PSYCHO_ONBOARD_IRQ_BASE]
353
354 #define PSYCHO_ICLR_A_SLOT0     0x1400UL
355 #define PSYCHO_ICLR_SCSI        0x1800UL
356
357 #define psycho_iclr_offset(ino)                                       \
358         ((ino & 0x20) ? (PSYCHO_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
359                         (PSYCHO_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
360
361 static unsigned int psycho_irq_build(struct device_node *dp,
362                                      unsigned int ino,
363                                      void *_data)
364 {
365         unsigned long controller_regs = (unsigned long) _data;
366         unsigned long imap, iclr;
367         unsigned long imap_off, iclr_off;
368         int inofixup = 0;
369
370         ino &= 0x3f;
371         if (ino < PSYCHO_ONBOARD_IRQ_BASE) {
372                 /* PCI slot */
373                 imap_off = psycho_pcislot_imap_offset(ino);
374         } else {
375                 /* Onboard device */
376                 if (ino > PSYCHO_ONBOARD_IRQ_LAST) {
377                         prom_printf("psycho_irq_build: Wacky INO [%x]\n", ino);
378                         prom_halt();
379                 }
380                 imap_off = psycho_onboard_imap_offset(ino);
381         }
382
383         /* Now build the IRQ bucket. */
384         imap = controller_regs + imap_off;
385         imap += 4;
386
387         iclr_off = psycho_iclr_offset(ino);
388         iclr = controller_regs + iclr_off;
389         iclr += 4;
390
391         if ((ino & 0x20) == 0)
392                 inofixup = ino & 0x03;
393
394         return build_irq(inofixup, iclr, imap);
395 }
396
397 static void psycho_irq_trans_init(struct device_node *dp)
398 {
399         struct linux_prom64_registers *regs;
400
401         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
402         dp->irq_trans->irq_build = psycho_irq_build;
403
404         regs = of_get_property(dp, "reg", NULL);
405         dp->irq_trans->data = (void *) regs[2].phys_addr;
406 }
407
408 #define sabre_read(__reg) \
409 ({      u64 __ret; \
410         __asm__ __volatile__("ldxa [%1] %2, %0" \
411                              : "=r" (__ret) \
412                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
413                              : "memory"); \
414         __ret; \
415 })
416
417 struct sabre_irq_data {
418         unsigned long controller_regs;
419         unsigned int pci_first_busno;
420 };
421 #define SABRE_CONFIGSPACE       0x001000000UL
422 #define SABRE_WRSYNC            0x1c20UL
423
424 #define SABRE_CONFIG_BASE(CONFIG_SPACE) \
425         (CONFIG_SPACE | (1UL << 24))
426 #define SABRE_CONFIG_ENCODE(BUS, DEVFN, REG)    \
427         (((unsigned long)(BUS)   << 16) |       \
428          ((unsigned long)(DEVFN) << 8)  |       \
429          ((unsigned long)(REG)))
430
431 /* When a device lives behind a bridge deeper in the PCI bus topology
432  * than APB, a special sequence must run to make sure all pending DMA
433  * transfers at the time of IRQ delivery are visible in the coherency
434  * domain by the cpu.  This sequence is to perform a read on the far
435  * side of the non-APB bridge, then perform a read of Sabre's DMA
436  * write-sync register.
437  */
438 static void sabre_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
439 {
440         unsigned int phys_hi = (unsigned int) (unsigned long) _arg1;
441         struct sabre_irq_data *irq_data = _arg2;
442         unsigned long controller_regs = irq_data->controller_regs;
443         unsigned long sync_reg = controller_regs + SABRE_WRSYNC;
444         unsigned long config_space = controller_regs + SABRE_CONFIGSPACE;
445         unsigned int bus, devfn;
446         u16 _unused;
447
448         config_space = SABRE_CONFIG_BASE(config_space);
449
450         bus = (phys_hi >> 16) & 0xff;
451         devfn = (phys_hi >> 8) & 0xff;
452
453         config_space |= SABRE_CONFIG_ENCODE(bus, devfn, 0x00);
454
455         __asm__ __volatile__("membar #Sync\n\t"
456                              "lduha [%1] %2, %0\n\t"
457                              "membar #Sync"
458                              : "=r" (_unused)
459                              : "r" ((u16 *) config_space),
460                                "i" (ASI_PHYS_BYPASS_EC_E_L)
461                              : "memory");
462
463         sabre_read(sync_reg);
464 }
465
466 #define SABRE_IMAP_A_SLOT0      0x0c00UL
467 #define SABRE_IMAP_B_SLOT0      0x0c20UL
468 #define SABRE_IMAP_SCSI         0x1000UL
469 #define SABRE_IMAP_ETH          0x1008UL
470 #define SABRE_IMAP_BPP          0x1010UL
471 #define SABRE_IMAP_AU_REC       0x1018UL
472 #define SABRE_IMAP_AU_PLAY      0x1020UL
473 #define SABRE_IMAP_PFAIL        0x1028UL
474 #define SABRE_IMAP_KMS          0x1030UL
475 #define SABRE_IMAP_FLPY         0x1038UL
476 #define SABRE_IMAP_SHW          0x1040UL
477 #define SABRE_IMAP_KBD          0x1048UL
478 #define SABRE_IMAP_MS           0x1050UL
479 #define SABRE_IMAP_SER          0x1058UL
480 #define SABRE_IMAP_UE           0x1070UL
481 #define SABRE_IMAP_CE           0x1078UL
482 #define SABRE_IMAP_PCIERR       0x1080UL
483 #define SABRE_IMAP_GFX          0x1098UL
484 #define SABRE_IMAP_EUPA         0x10a0UL
485 #define SABRE_ICLR_A_SLOT0      0x1400UL
486 #define SABRE_ICLR_B_SLOT0      0x1480UL
487 #define SABRE_ICLR_SCSI         0x1800UL
488 #define SABRE_ICLR_ETH          0x1808UL
489 #define SABRE_ICLR_BPP          0x1810UL
490 #define SABRE_ICLR_AU_REC       0x1818UL
491 #define SABRE_ICLR_AU_PLAY      0x1820UL
492 #define SABRE_ICLR_PFAIL        0x1828UL
493 #define SABRE_ICLR_KMS          0x1830UL
494 #define SABRE_ICLR_FLPY         0x1838UL
495 #define SABRE_ICLR_SHW          0x1840UL
496 #define SABRE_ICLR_KBD          0x1848UL
497 #define SABRE_ICLR_MS           0x1850UL
498 #define SABRE_ICLR_SER          0x1858UL
499 #define SABRE_ICLR_UE           0x1870UL
500 #define SABRE_ICLR_CE           0x1878UL
501 #define SABRE_ICLR_PCIERR       0x1880UL
502
503 static unsigned long sabre_pcislot_imap_offset(unsigned long ino)
504 {
505         unsigned int bus =  (ino & 0x10) >> 4;
506         unsigned int slot = (ino & 0x0c) >> 2;
507
508         if (bus == 0)
509                 return SABRE_IMAP_A_SLOT0 + (slot * 8);
510         else
511                 return SABRE_IMAP_B_SLOT0 + (slot * 8);
512 }
513
514 static unsigned long __sabre_onboard_imap_off[] = {
515 /*0x20*/        SABRE_IMAP_SCSI,
516 /*0x21*/        SABRE_IMAP_ETH,
517 /*0x22*/        SABRE_IMAP_BPP,
518 /*0x23*/        SABRE_IMAP_AU_REC,
519 /*0x24*/        SABRE_IMAP_AU_PLAY,
520 /*0x25*/        SABRE_IMAP_PFAIL,
521 /*0x26*/        SABRE_IMAP_KMS,
522 /*0x27*/        SABRE_IMAP_FLPY,
523 /*0x28*/        SABRE_IMAP_SHW,
524 /*0x29*/        SABRE_IMAP_KBD,
525 /*0x2a*/        SABRE_IMAP_MS,
526 /*0x2b*/        SABRE_IMAP_SER,
527 /*0x2c*/        0 /* reserved */,
528 /*0x2d*/        0 /* reserved */,
529 /*0x2e*/        SABRE_IMAP_UE,
530 /*0x2f*/        SABRE_IMAP_CE,
531 /*0x30*/        SABRE_IMAP_PCIERR,
532 };
533 #define SABRE_ONBOARD_IRQ_BASE          0x20
534 #define SABRE_ONBOARD_IRQ_LAST          0x30
535 #define sabre_onboard_imap_offset(__ino) \
536         __sabre_onboard_imap_off[(__ino) - SABRE_ONBOARD_IRQ_BASE]
537
538 #define sabre_iclr_offset(ino)                                        \
539         ((ino & 0x20) ? (SABRE_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
540                         (SABRE_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))
541
542 static int sabre_device_needs_wsync(struct device_node *dp)
543 {
544         struct device_node *parent = dp->parent;
545         char *parent_model, *parent_compat;
546
547         /* This traversal up towards the root is meant to
548          * handle two cases:
549          *
550          * 1) non-PCI bus sitting under PCI, such as 'ebus'
551          * 2) the PCI controller interrupts themselves, which
552          *    will use the sabre_irq_build but do not need
553          *    the DMA synchronization handling
554          */
555         while (parent) {
556                 if (!strcmp(parent->type, "pci"))
557                         break;
558                 parent = parent->parent;
559         }
560
561         if (!parent)
562                 return 0;
563
564         parent_model = of_get_property(parent,
565                                        "model", NULL);
566         if (parent_model &&
567             (!strcmp(parent_model, "SUNW,sabre") ||
568              !strcmp(parent_model, "SUNW,simba")))
569                 return 0;
570
571         parent_compat = of_get_property(parent,
572                                         "compatible", NULL);
573         if (parent_compat &&
574             (!strcmp(parent_compat, "pci108e,a000") ||
575              !strcmp(parent_compat, "pci108e,a001")))
576                 return 0;
577
578         return 1;
579 }
580
581 static unsigned int sabre_irq_build(struct device_node *dp,
582                                     unsigned int ino,
583                                     void *_data)
584 {
585         struct sabre_irq_data *irq_data = _data;
586         unsigned long controller_regs = irq_data->controller_regs;
587         struct linux_prom_pci_registers *regs;
588         unsigned long imap, iclr;
589         unsigned long imap_off, iclr_off;
590         int inofixup = 0;
591         int virt_irq;
592
593         ino &= 0x3f;
594         if (ino < SABRE_ONBOARD_IRQ_BASE) {
595                 /* PCI slot */
596                 imap_off = sabre_pcislot_imap_offset(ino);
597         } else {
598                 /* onboard device */
599                 if (ino > SABRE_ONBOARD_IRQ_LAST) {
600                         prom_printf("sabre_irq_build: Wacky INO [%x]\n", ino);
601                         prom_halt();
602                 }
603                 imap_off = sabre_onboard_imap_offset(ino);
604         }
605
606         /* Now build the IRQ bucket. */
607         imap = controller_regs + imap_off;
608         imap += 4;
609
610         iclr_off = sabre_iclr_offset(ino);
611         iclr = controller_regs + iclr_off;
612         iclr += 4;
613
614         if ((ino & 0x20) == 0)
615                 inofixup = ino & 0x03;
616
617         virt_irq = build_irq(inofixup, iclr, imap);
618
619         /* If the parent device is a PCI<->PCI bridge other than
620          * APB, we have to install a pre-handler to ensure that
621          * all pending DMA is drained before the interrupt handler
622          * is run.
623          */
624         regs = of_get_property(dp, "reg", NULL);
625         if (regs && sabre_device_needs_wsync(dp)) {
626                 irq_install_pre_handler(virt_irq,
627                                         sabre_wsync_handler,
628                                         (void *) (long) regs->phys_hi,
629                                         (void *) irq_data);
630         }
631
632         return virt_irq;
633 }
634
635 static void sabre_irq_trans_init(struct device_node *dp)
636 {
637         struct linux_prom64_registers *regs;
638         struct sabre_irq_data *irq_data;
639         u32 *busrange;
640
641         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
642         dp->irq_trans->irq_build = sabre_irq_build;
643
644         irq_data = prom_early_alloc(sizeof(struct sabre_irq_data));
645
646         regs = of_get_property(dp, "reg", NULL);
647         irq_data->controller_regs = regs[0].phys_addr;
648
649         busrange = of_get_property(dp, "bus-range", NULL);
650         irq_data->pci_first_busno = busrange[0];
651
652         dp->irq_trans->data = irq_data;
653 }
654
655 /* SCHIZO interrupt mapping support.  Unlike Psycho, for this controller the
656  * imap/iclr registers are per-PBM.
657  */
658 #define SCHIZO_IMAP_BASE        0x1000UL
659 #define SCHIZO_ICLR_BASE        0x1400UL
660
661 static unsigned long schizo_imap_offset(unsigned long ino)
662 {
663         return SCHIZO_IMAP_BASE + (ino * 8UL);
664 }
665
666 static unsigned long schizo_iclr_offset(unsigned long ino)
667 {
668         return SCHIZO_ICLR_BASE + (ino * 8UL);
669 }
670
671 static unsigned long schizo_ino_to_iclr(unsigned long pbm_regs,
672                                         unsigned int ino)
673 {
674         return pbm_regs + schizo_iclr_offset(ino) + 4;
675 }
676
677 static unsigned long schizo_ino_to_imap(unsigned long pbm_regs,
678                                         unsigned int ino)
679 {
680         return pbm_regs + schizo_imap_offset(ino) + 4;
681 }
682
683 #define schizo_read(__reg) \
684 ({      u64 __ret; \
685         __asm__ __volatile__("ldxa [%1] %2, %0" \
686                              : "=r" (__ret) \
687                              : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
688                              : "memory"); \
689         __ret; \
690 })
691 #define schizo_write(__reg, __val) \
692         __asm__ __volatile__("stxa %0, [%1] %2" \
693                              : /* no outputs */ \
694                              : "r" (__val), "r" (__reg), \
695                                "i" (ASI_PHYS_BYPASS_EC_E) \
696                              : "memory")
697
698 static void tomatillo_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
699 {
700         unsigned long sync_reg = (unsigned long) _arg2;
701         u64 mask = 1UL << (ino & IMAP_INO);
702         u64 val;
703         int limit;
704
705         schizo_write(sync_reg, mask);
706
707         limit = 100000;
708         val = 0;
709         while (--limit) {
710                 val = schizo_read(sync_reg);
711                 if (!(val & mask))
712                         break;
713         }
714         if (limit <= 0) {
715                 printk("tomatillo_wsync_handler: DMA won't sync [%lx:%lx]\n",
716                        val, mask);
717         }
718
719         if (_arg1) {
720                 static unsigned char cacheline[64]
721                         __attribute__ ((aligned (64)));
722
723                 __asm__ __volatile__("rd %%fprs, %0\n\t"
724                                      "or %0, %4, %1\n\t"
725                                      "wr %1, 0x0, %%fprs\n\t"
726                                      "stda %%f0, [%5] %6\n\t"
727                                      "wr %0, 0x0, %%fprs\n\t"
728                                      "membar #Sync"
729                                      : "=&r" (mask), "=&r" (val)
730                                      : "0" (mask), "1" (val),
731                                      "i" (FPRS_FEF), "r" (&cacheline[0]),
732                                      "i" (ASI_BLK_COMMIT_P));
733         }
734 }
735
736 struct schizo_irq_data {
737         unsigned long pbm_regs;
738         unsigned long sync_reg;
739         u32 portid;
740         int chip_version;
741 };
742
743 static unsigned int schizo_irq_build(struct device_node *dp,
744                                      unsigned int ino,
745                                      void *_data)
746 {
747         struct schizo_irq_data *irq_data = _data;
748         unsigned long pbm_regs = irq_data->pbm_regs;
749         unsigned long imap, iclr;
750         int ign_fixup;
751         int virt_irq;
752         int is_tomatillo;
753
754         ino &= 0x3f;
755
756         /* Now build the IRQ bucket. */
757         imap = schizo_ino_to_imap(pbm_regs, ino);
758         iclr = schizo_ino_to_iclr(pbm_regs, ino);
759
760         /* On Schizo, no inofixup occurs.  This is because each
761          * INO has it's own IMAP register.  On Psycho and Sabre
762          * there is only one IMAP register for each PCI slot even
763          * though four different INOs can be generated by each
764          * PCI slot.
765          *
766          * But, for JBUS variants (essentially, Tomatillo), we have
767          * to fixup the lowest bit of the interrupt group number.
768          */
769         ign_fixup = 0;
770
771         is_tomatillo = (irq_data->sync_reg != 0UL);
772
773         if (is_tomatillo) {
774                 if (irq_data->portid & 1)
775                         ign_fixup = (1 << 6);
776         }
777
778         virt_irq = build_irq(ign_fixup, iclr, imap);
779
780         if (is_tomatillo) {
781                 irq_install_pre_handler(virt_irq,
782                                         tomatillo_wsync_handler,
783                                         ((irq_data->chip_version <= 4) ?
784                                          (void *) 1 : (void *) 0),
785                                         (void *) irq_data->sync_reg);
786         }
787
788         return virt_irq;
789 }
790
791 static void schizo_irq_trans_init(struct device_node *dp)
792 {
793         struct linux_prom64_registers *regs;
794         struct schizo_irq_data *irq_data;
795
796         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
797         dp->irq_trans->irq_build = schizo_irq_build;
798
799         irq_data = prom_early_alloc(sizeof(struct schizo_irq_data));
800
801         regs = of_get_property(dp, "reg", NULL);
802         dp->irq_trans->data = irq_data;
803
804         irq_data->pbm_regs = regs[0].phys_addr;
805         irq_data->sync_reg = regs[3].phys_addr + 0x1a18UL;
806         irq_data->portid = of_getintprop_default(dp, "portid", 0);
807         irq_data->chip_version = of_getintprop_default(dp, "version#", 0);
808 }
809
810 static unsigned int pci_sun4v_irq_build(struct device_node *dp,
811                                         unsigned int devino,
812                                         void *_data)
813 {
814         u32 devhandle = (u32) (unsigned long) _data;
815
816         return sun4v_build_irq(devhandle, devino);
817 }
818
819 static void pci_sun4v_irq_trans_init(struct device_node *dp)
820 {
821         struct linux_prom64_registers *regs;
822
823         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
824         dp->irq_trans->irq_build = pci_sun4v_irq_build;
825
826         regs = of_get_property(dp, "reg", NULL);
827         dp->irq_trans->data = (void *) (unsigned long)
828                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
829 }
830 #endif /* CONFIG_PCI */
831
832 #ifdef CONFIG_SBUS
833 /* INO number to IMAP register offset for SYSIO external IRQ's.
834  * This should conform to both Sunfire/Wildfire server and Fusion
835  * desktop designs.
836  */
837 #define SYSIO_IMAP_SLOT0        0x2c04UL
838 #define SYSIO_IMAP_SLOT1        0x2c0cUL
839 #define SYSIO_IMAP_SLOT2        0x2c14UL
840 #define SYSIO_IMAP_SLOT3        0x2c1cUL
841 #define SYSIO_IMAP_SCSI         0x3004UL
842 #define SYSIO_IMAP_ETH          0x300cUL
843 #define SYSIO_IMAP_BPP          0x3014UL
844 #define SYSIO_IMAP_AUDIO        0x301cUL
845 #define SYSIO_IMAP_PFAIL        0x3024UL
846 #define SYSIO_IMAP_KMS          0x302cUL
847 #define SYSIO_IMAP_FLPY         0x3034UL
848 #define SYSIO_IMAP_SHW          0x303cUL
849 #define SYSIO_IMAP_KBD          0x3044UL
850 #define SYSIO_IMAP_MS           0x304cUL
851 #define SYSIO_IMAP_SER          0x3054UL
852 #define SYSIO_IMAP_TIM0         0x3064UL
853 #define SYSIO_IMAP_TIM1         0x306cUL
854 #define SYSIO_IMAP_UE           0x3074UL
855 #define SYSIO_IMAP_CE           0x307cUL
856 #define SYSIO_IMAP_SBERR        0x3084UL
857 #define SYSIO_IMAP_PMGMT        0x308cUL
858 #define SYSIO_IMAP_GFX          0x3094UL
859 #define SYSIO_IMAP_EUPA         0x309cUL
860
861 #define bogon     ((unsigned long) -1)
862 static unsigned long sysio_irq_offsets[] = {
863         /* SBUS Slot 0 --> 3, level 1 --> 7 */
864         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
865         SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
866         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
867         SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
868         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
869         SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
870         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
871         SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
872
873         /* Onboard devices (not relevant/used on SunFire). */
874         SYSIO_IMAP_SCSI,
875         SYSIO_IMAP_ETH,
876         SYSIO_IMAP_BPP,
877         bogon,
878         SYSIO_IMAP_AUDIO,
879         SYSIO_IMAP_PFAIL,
880         bogon,
881         bogon,
882         SYSIO_IMAP_KMS,
883         SYSIO_IMAP_FLPY,
884         SYSIO_IMAP_SHW,
885         SYSIO_IMAP_KBD,
886         SYSIO_IMAP_MS,
887         SYSIO_IMAP_SER,
888         bogon,
889         bogon,
890         SYSIO_IMAP_TIM0,
891         SYSIO_IMAP_TIM1,
892         bogon,
893         bogon,
894         SYSIO_IMAP_UE,
895         SYSIO_IMAP_CE,
896         SYSIO_IMAP_SBERR,
897         SYSIO_IMAP_PMGMT,
898 };
899
900 #undef bogon
901
902 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
903
904 /* Convert Interrupt Mapping register pointer to associated
905  * Interrupt Clear register pointer, SYSIO specific version.
906  */
907 #define SYSIO_ICLR_UNUSED0      0x3400UL
908 #define SYSIO_ICLR_SLOT0        0x340cUL
909 #define SYSIO_ICLR_SLOT1        0x344cUL
910 #define SYSIO_ICLR_SLOT2        0x348cUL
911 #define SYSIO_ICLR_SLOT3        0x34ccUL
912 static unsigned long sysio_imap_to_iclr(unsigned long imap)
913 {
914         unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
915         return imap + diff;
916 }
917
918 static unsigned int sbus_of_build_irq(struct device_node *dp,
919                                       unsigned int ino,
920                                       void *_data)
921 {
922         unsigned long reg_base = (unsigned long) _data;
923         struct linux_prom_registers *regs;
924         unsigned long imap, iclr;
925         int sbus_slot = 0;
926         int sbus_level = 0;
927
928         ino &= 0x3f;
929
930         regs = of_get_property(dp, "reg", NULL);
931         if (regs)
932                 sbus_slot = regs->which_io;
933
934         if (ino < 0x20)
935                 ino += (sbus_slot * 8);
936
937         imap = sysio_irq_offsets[ino];
938         if (imap == ((unsigned long)-1)) {
939                 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
940                             ino);
941                 prom_halt();
942         }
943         imap += reg_base;
944
945         /* SYSIO inconsistency.  For external SLOTS, we have to select
946          * the right ICLR register based upon the lower SBUS irq level
947          * bits.
948          */
949         if (ino >= 0x20) {
950                 iclr = sysio_imap_to_iclr(imap);
951         } else {
952                 sbus_level = ino & 0x7;
953
954                 switch(sbus_slot) {
955                 case 0:
956                         iclr = reg_base + SYSIO_ICLR_SLOT0;
957                         break;
958                 case 1:
959                         iclr = reg_base + SYSIO_ICLR_SLOT1;
960                         break;
961                 case 2:
962                         iclr = reg_base + SYSIO_ICLR_SLOT2;
963                         break;
964                 default:
965                 case 3:
966                         iclr = reg_base + SYSIO_ICLR_SLOT3;
967                         break;
968                 };
969
970                 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
971         }
972         return build_irq(sbus_level, iclr, imap);
973 }
974
975 static void sbus_irq_trans_init(struct device_node *dp)
976 {
977         struct linux_prom64_registers *regs;
978
979         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
980         dp->irq_trans->irq_build = sbus_of_build_irq;
981
982         regs = of_get_property(dp, "reg", NULL);
983         dp->irq_trans->data = (void *) (unsigned long) regs->phys_addr;
984 }
985 #endif /* CONFIG_SBUS */
986
987
988 static unsigned int central_build_irq(struct device_node *dp,
989                                       unsigned int ino,
990                                       void *_data)
991 {
992         struct device_node *central_dp = _data;
993         struct of_device *central_op = of_find_device_by_node(central_dp);
994         struct resource *res;
995         unsigned long imap, iclr;
996         u32 tmp;
997
998         if (!strcmp(dp->name, "eeprom")) {
999                 res = &central_op->resource[5];
1000         } else if (!strcmp(dp->name, "zs")) {
1001                 res = &central_op->resource[4];
1002         } else if (!strcmp(dp->name, "clock-board")) {
1003                 res = &central_op->resource[3];
1004         } else {
1005                 return ino;
1006         }
1007
1008         imap = res->start + 0x00UL;
1009         iclr = res->start + 0x10UL;
1010
1011         /* Set the INO state to idle, and disable.  */
1012         upa_writel(0, iclr);
1013         upa_readl(iclr);
1014
1015         tmp = upa_readl(imap);
1016         tmp &= ~0x80000000;
1017         upa_writel(tmp, imap);
1018
1019         return build_irq(0, iclr, imap);
1020 }
1021
1022 static void central_irq_trans_init(struct device_node *dp)
1023 {
1024         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
1025         dp->irq_trans->irq_build = central_build_irq;
1026
1027         dp->irq_trans->data = dp;
1028 }
1029
1030 struct irq_trans {
1031         const char *name;
1032         void (*init)(struct device_node *);
1033 };
1034
1035 #ifdef CONFIG_PCI
1036 static struct irq_trans pci_irq_trans_table[] = {
1037         { "SUNW,sabre", sabre_irq_trans_init },
1038         { "pci108e,a000", sabre_irq_trans_init },
1039         { "pci108e,a001", sabre_irq_trans_init },
1040         { "SUNW,psycho", psycho_irq_trans_init },
1041         { "pci108e,8000", psycho_irq_trans_init },
1042         { "SUNW,schizo", schizo_irq_trans_init },
1043         { "pci108e,8001", schizo_irq_trans_init },
1044         { "SUNW,schizo+", schizo_irq_trans_init },
1045         { "pci108e,8002", schizo_irq_trans_init },
1046         { "SUNW,tomatillo", schizo_irq_trans_init },
1047         { "pci108e,a801", schizo_irq_trans_init },
1048         { "SUNW,sun4v-pci", pci_sun4v_irq_trans_init },
1049 };
1050 #endif
1051
1052 static unsigned int sun4v_vdev_irq_build(struct device_node *dp,
1053                                          unsigned int devino,
1054                                          void *_data)
1055 {
1056         u32 devhandle = (u32) (unsigned long) _data;
1057
1058         return sun4v_build_irq(devhandle, devino);
1059 }
1060
1061 static void sun4v_vdev_irq_trans_init(struct device_node *dp)
1062 {
1063         struct linux_prom64_registers *regs;
1064
1065         dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
1066         dp->irq_trans->irq_build = sun4v_vdev_irq_build;
1067
1068         regs = of_get_property(dp, "reg", NULL);
1069         dp->irq_trans->data = (void *) (unsigned long)
1070                 ((regs->phys_addr >> 32UL) & 0x0fffffff);
1071 }
1072
1073 static void irq_trans_init(struct device_node *dp)
1074 {
1075         const char *model;
1076 #ifdef CONFIG_PCI
1077         int i;
1078 #endif
1079
1080         model = of_get_property(dp, "model", NULL);
1081         if (!model)
1082                 model = of_get_property(dp, "compatible", NULL);
1083         if (!model)
1084                 return;
1085
1086 #ifdef CONFIG_PCI
1087         for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
1088                 struct irq_trans *t = &pci_irq_trans_table[i];
1089
1090                 if (!strcmp(model, t->name))
1091                         return t->init(dp);
1092         }
1093 #endif
1094 #ifdef CONFIG_SBUS
1095         if (!strcmp(dp->name, "sbus") ||
1096             !strcmp(dp->name, "sbi"))
1097                 return sbus_irq_trans_init(dp);
1098 #endif
1099         if (!strcmp(dp->name, "central"))
1100                 return central_irq_trans_init(dp->child);
1101         if (!strcmp(dp->name, "virtual-devices"))
1102                 return sun4v_vdev_irq_trans_init(dp);
1103 }
1104
1105 static int is_root_node(const struct device_node *dp)
1106 {
1107         if (!dp)
1108                 return 0;
1109
1110         return (dp->parent == NULL);
1111 }
1112
1113 /* The following routines deal with the black magic of fully naming a
1114  * node.
1115  *
1116  * Certain well known named nodes are just the simple name string.
1117  *
1118  * Actual devices have an address specifier appended to the base name
1119  * string, like this "foo@addr".  The "addr" can be in any number of
1120  * formats, and the platform plus the type of the node determine the
1121  * format and how it is constructed.
1122  *
1123  * For children of the ROOT node, the naming convention is fixed and
1124  * determined by whether this is a sun4u or sun4v system.
1125  *
1126  * For children of other nodes, it is bus type specific.  So
1127  * we walk up the tree until we discover a "device_type" property
1128  * we recognize and we go from there.
1129  *
1130  * As an example, the boot device on my workstation has a full path:
1131  *
1132  *      /pci@1e,600000/ide@d/disk@0,0:c
1133  */
1134 static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
1135 {
1136         struct linux_prom64_registers *regs;
1137         struct property *rprop;
1138         u32 high_bits, low_bits, type;
1139
1140         rprop = of_find_property(dp, "reg", NULL);
1141         if (!rprop)
1142                 return;
1143
1144         regs = rprop->value;
1145         if (!is_root_node(dp->parent)) {
1146                 sprintf(tmp_buf, "%s@%x,%x",
1147                         dp->name,
1148                         (unsigned int) (regs->phys_addr >> 32UL),
1149                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1150                 return;
1151         }
1152
1153         type = regs->phys_addr >> 60UL;
1154         high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
1155         low_bits = (regs->phys_addr & 0xffffffffUL);
1156
1157         if (type == 0 || type == 8) {
1158                 const char *prefix = (type == 0) ? "m" : "i";
1159
1160                 if (low_bits)
1161                         sprintf(tmp_buf, "%s@%s%x,%x",
1162                                 dp->name, prefix,
1163                                 high_bits, low_bits);
1164                 else
1165                         sprintf(tmp_buf, "%s@%s%x",
1166                                 dp->name,
1167                                 prefix,
1168                                 high_bits);
1169         } else if (type == 12) {
1170                 sprintf(tmp_buf, "%s@%x",
1171                         dp->name, high_bits);
1172         }
1173 }
1174
1175 static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
1176 {
1177         struct linux_prom64_registers *regs;
1178         struct property *prop;
1179
1180         prop = of_find_property(dp, "reg", NULL);
1181         if (!prop)
1182                 return;
1183
1184         regs = prop->value;
1185         if (!is_root_node(dp->parent)) {
1186                 sprintf(tmp_buf, "%s@%x,%x",
1187                         dp->name,
1188                         (unsigned int) (regs->phys_addr >> 32UL),
1189                         (unsigned int) (regs->phys_addr & 0xffffffffUL));
1190                 return;
1191         }
1192
1193         prop = of_find_property(dp, "upa-portid", NULL);
1194         if (!prop)
1195                 prop = of_find_property(dp, "portid", NULL);
1196         if (prop) {
1197                 unsigned long mask = 0xffffffffUL;
1198
1199                 if (tlb_type >= cheetah)
1200                         mask = 0x7fffff;
1201
1202                 sprintf(tmp_buf, "%s@%x,%x",
1203                         dp->name,
1204                         *(u32 *)prop->value,
1205                         (unsigned int) (regs->phys_addr & mask));
1206         }
1207 }
1208
1209 /* "name@slot,offset"  */
1210 static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
1211 {
1212         struct linux_prom_registers *regs;
1213         struct property *prop;
1214
1215         prop = of_find_property(dp, "reg", NULL);
1216         if (!prop)
1217                 return;
1218
1219         regs = prop->value;
1220         sprintf(tmp_buf, "%s@%x,%x",
1221                 dp->name,
1222                 regs->which_io,
1223                 regs->phys_addr);
1224 }
1225
1226 /* "name@devnum[,func]" */
1227 static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
1228 {
1229         struct linux_prom_pci_registers *regs;
1230         struct property *prop;
1231         unsigned int devfn;
1232
1233         prop = of_find_property(dp, "reg", NULL);
1234         if (!prop)
1235                 return;
1236
1237         regs = prop->value;
1238         devfn = (regs->phys_hi >> 8) & 0xff;
1239         if (devfn & 0x07) {
1240                 sprintf(tmp_buf, "%s@%x,%x",
1241                         dp->name,
1242                         devfn >> 3,
1243                         devfn & 0x07);
1244         } else {
1245                 sprintf(tmp_buf, "%s@%x",
1246                         dp->name,
1247                         devfn >> 3);
1248         }
1249 }
1250
1251 /* "name@UPA_PORTID,offset" */
1252 static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
1253 {
1254         struct linux_prom64_registers *regs;
1255         struct property *prop;
1256
1257         prop = of_find_property(dp, "reg", NULL);
1258         if (!prop)
1259                 return;
1260
1261         regs = prop->value;
1262
1263         prop = of_find_property(dp, "upa-portid", NULL);
1264         if (!prop)
1265                 return;
1266
1267         sprintf(tmp_buf, "%s@%x,%x",
1268                 dp->name,
1269                 *(u32 *) prop->value,
1270                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1271 }
1272
1273 /* "name@reg" */
1274 static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
1275 {
1276         struct property *prop;
1277         u32 *regs;
1278
1279         prop = of_find_property(dp, "reg", NULL);
1280         if (!prop)
1281                 return;
1282
1283         regs = prop->value;
1284
1285         sprintf(tmp_buf, "%s@%x", dp->name, *regs);
1286 }
1287
1288 /* "name@addrhi,addrlo" */
1289 static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
1290 {
1291         struct linux_prom64_registers *regs;
1292         struct property *prop;
1293
1294         prop = of_find_property(dp, "reg", NULL);
1295         if (!prop)
1296                 return;
1297
1298         regs = prop->value;
1299
1300         sprintf(tmp_buf, "%s@%x,%x",
1301                 dp->name,
1302                 (unsigned int) (regs->phys_addr >> 32UL),
1303                 (unsigned int) (regs->phys_addr & 0xffffffffUL));
1304 }
1305
1306 /* "name@bus,addr" */
1307 static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
1308 {
1309         struct property *prop;
1310         u32 *regs;
1311
1312         prop = of_find_property(dp, "reg", NULL);
1313         if (!prop)
1314                 return;
1315
1316         regs = prop->value;
1317
1318         /* This actually isn't right... should look at the #address-cells
1319          * property of the i2c bus node etc. etc.
1320          */
1321         sprintf(tmp_buf, "%s@%x,%x",
1322                 dp->name, regs[0], regs[1]);
1323 }
1324
1325 /* "name@reg0[,reg1]" */
1326 static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
1327 {
1328         struct property *prop;
1329         u32 *regs;
1330
1331         prop = of_find_property(dp, "reg", NULL);
1332         if (!prop)
1333                 return;
1334
1335         regs = prop->value;
1336
1337         if (prop->length == sizeof(u32) || regs[1] == 1) {
1338                 sprintf(tmp_buf, "%s@%x",
1339                         dp->name, regs[0]);
1340         } else {
1341                 sprintf(tmp_buf, "%s@%x,%x",
1342                         dp->name, regs[0], regs[1]);
1343         }
1344 }
1345
1346 /* "name@reg0reg1[,reg2reg3]" */
1347 static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
1348 {
1349         struct property *prop;
1350         u32 *regs;
1351
1352         prop = of_find_property(dp, "reg", NULL);
1353         if (!prop)
1354                 return;
1355
1356         regs = prop->value;
1357
1358         if (regs[2] || regs[3]) {
1359                 sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
1360                         dp->name, regs[0], regs[1], regs[2], regs[3]);
1361         } else {
1362                 sprintf(tmp_buf, "%s@%08x%08x",
1363                         dp->name, regs[0], regs[1]);
1364         }
1365 }
1366
1367 static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
1368 {
1369         struct device_node *parent = dp->parent;
1370
1371         if (parent != NULL) {
1372                 if (!strcmp(parent->type, "pci") ||
1373                     !strcmp(parent->type, "pciex"))
1374                         return pci_path_component(dp, tmp_buf);
1375                 if (!strcmp(parent->type, "sbus"))
1376                         return sbus_path_component(dp, tmp_buf);
1377                 if (!strcmp(parent->type, "upa"))
1378                         return upa_path_component(dp, tmp_buf);
1379                 if (!strcmp(parent->type, "ebus"))
1380                         return ebus_path_component(dp, tmp_buf);
1381                 if (!strcmp(parent->name, "usb") ||
1382                     !strcmp(parent->name, "hub"))
1383                         return usb_path_component(dp, tmp_buf);
1384                 if (!strcmp(parent->type, "i2c"))
1385                         return i2c_path_component(dp, tmp_buf);
1386                 if (!strcmp(parent->type, "firewire"))
1387                         return ieee1394_path_component(dp, tmp_buf);
1388                 if (!strcmp(parent->type, "virtual-devices"))
1389                         return vdev_path_component(dp, tmp_buf);
1390
1391                 /* "isa" is handled with platform naming */
1392         }
1393
1394         /* Use platform naming convention.  */
1395         if (tlb_type == hypervisor)
1396                 return sun4v_path_component(dp, tmp_buf);
1397         else
1398                 return sun4u_path_component(dp, tmp_buf);
1399 }
1400
1401 static char * __init build_path_component(struct device_node *dp)
1402 {
1403         char tmp_buf[64], *n;
1404
1405         tmp_buf[0] = '\0';
1406         __build_path_component(dp, tmp_buf);
1407         if (tmp_buf[0] == '\0')
1408                 strcpy(tmp_buf, dp->name);
1409
1410         n = prom_early_alloc(strlen(tmp_buf) + 1);
1411         strcpy(n, tmp_buf);
1412
1413         return n;
1414 }
1415
1416 static char * __init build_full_name(struct device_node *dp)
1417 {
1418         int len, ourlen, plen;
1419         char *n;
1420
1421         plen = strlen(dp->parent->full_name);
1422         ourlen = strlen(dp->path_component_name);
1423         len = ourlen + plen + 2;
1424
1425         n = prom_early_alloc(len);
1426         strcpy(n, dp->parent->full_name);
1427         if (!is_root_node(dp->parent)) {
1428                 strcpy(n + plen, "/");
1429                 plen++;
1430         }
1431         strcpy(n + plen, dp->path_component_name);
1432
1433         return n;
1434 }
1435
1436 static unsigned int unique_id;
1437
1438 static struct property * __init build_one_prop(phandle node, char *prev, char *special_name, void *special_val, int special_len)
1439 {
1440         static struct property *tmp = NULL;
1441         struct property *p;
1442
1443         if (tmp) {
1444                 p = tmp;
1445                 memset(p, 0, sizeof(*p) + 32);
1446                 tmp = NULL;
1447         } else {
1448                 p = prom_early_alloc(sizeof(struct property) + 32);
1449                 p->unique_id = unique_id++;
1450         }
1451
1452         p->name = (char *) (p + 1);
1453         if (special_name) {
1454                 strcpy(p->name, special_name);
1455                 p->length = special_len;
1456                 p->value = prom_early_alloc(special_len);
1457                 memcpy(p->value, special_val, special_len);
1458         } else {
1459                 if (prev == NULL) {
1460                         prom_firstprop(node, p->name);
1461                 } else {
1462                         prom_nextprop(node, prev, p->name);
1463                 }
1464                 if (strlen(p->name) == 0) {
1465                         tmp = p;
1466                         return NULL;
1467                 }
1468                 p->length = prom_getproplen(node, p->name);
1469                 if (p->length <= 0) {
1470                         p->length = 0;
1471                 } else {
1472                         p->value = prom_early_alloc(p->length + 1);
1473                         prom_getproperty(node, p->name, p->value, p->length);
1474                         ((unsigned char *)p->value)[p->length] = '\0';
1475                 }
1476         }
1477         return p;
1478 }
1479
1480 static struct property * __init build_prop_list(phandle node)
1481 {
1482         struct property *head, *tail;
1483
1484         head = tail = build_one_prop(node, NULL,
1485                                      ".node", &node, sizeof(node));
1486
1487         tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
1488         tail = tail->next;
1489         while(tail) {
1490                 tail->next = build_one_prop(node, tail->name,
1491                                             NULL, NULL, 0);
1492                 tail = tail->next;
1493         }
1494
1495         return head;
1496 }
1497
1498 static char * __init get_one_property(phandle node, const char *name)
1499 {
1500         char *buf = "<NULL>";
1501         int len;
1502
1503         len = prom_getproplen(node, name);
1504         if (len > 0) {
1505                 buf = prom_early_alloc(len);
1506                 prom_getproperty(node, name, buf, len);
1507         }
1508
1509         return buf;
1510 }
1511
1512 static struct device_node * __init create_node(phandle node)
1513 {
1514         struct device_node *dp;
1515
1516         if (!node)
1517                 return NULL;
1518
1519         dp = prom_early_alloc(sizeof(*dp));
1520         dp->unique_id = unique_id++;
1521
1522         kref_init(&dp->kref);
1523
1524         dp->name = get_one_property(node, "name");
1525         dp->type = get_one_property(node, "device_type");
1526         dp->node = node;
1527
1528         dp->properties = build_prop_list(node);
1529
1530         irq_trans_init(dp);
1531
1532         return dp;
1533 }
1534
1535 static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
1536 {
1537         struct device_node *dp;
1538
1539         dp = create_node(node);
1540         if (dp) {
1541                 *(*nextp) = dp;
1542                 *nextp = &dp->allnext;
1543
1544                 dp->parent = parent;
1545                 dp->path_component_name = build_path_component(dp);
1546                 dp->full_name = build_full_name(dp);
1547
1548                 dp->child = build_tree(dp, prom_getchild(node), nextp);
1549
1550                 dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
1551         }
1552
1553         return dp;
1554 }
1555
1556 void __init prom_build_devicetree(void)
1557 {
1558         struct device_node **nextp;
1559
1560         allnodes = create_node(prom_root_node);
1561         allnodes->path_component_name = "";
1562         allnodes->full_name = "/";
1563
1564         nextp = &allnodes->allnext;
1565         allnodes->child = build_tree(allnodes,
1566                                      prom_getchild(allnodes->node),
1567                                      &nextp);
1568         printk("PROM: Built device tree with %u bytes of memory.\n",
1569                prom_early_allocated);
1570 }