Commit | Line | Data |
---|---|---|
372b07bb DM |
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> | |
de8d28b1 | 22 | #include <linux/module.h> |
95f72d1e | 23 | #include <linux/memblock.h> |
035ebefc | 24 | #include <linux/of.h> |
372b07bb DM |
25 | |
26 | #include <asm/prom.h> | |
27 | #include <asm/oplib.h> | |
2b1e5978 DM |
28 | #include <asm/irq.h> |
29 | #include <asm/asi.h> | |
30 | #include <asm/upa.h> | |
5cbc3073 | 31 | #include <asm/smp.h> |
372b07bb | 32 | |
657f201d | 33 | #include "prom.h" |
fb7cd9d9 | 34 | |
efeac2f8 | 35 | void * __init prom_early_alloc(unsigned long size) |
372b07bb | 36 | { |
95f72d1e | 37 | unsigned long paddr = memblock_alloc(size, SMP_CACHE_BYTES); |
372b07bb DM |
38 | void *ret; |
39 | ||
ad072004 DM |
40 | if (!paddr) { |
41 | prom_printf("prom_early_alloc(%lu) failed\n"); | |
42 | prom_halt(); | |
43 | } | |
372b07bb | 44 | |
ad072004 DM |
45 | ret = __va(paddr); |
46 | memset(ret, 0, size); | |
372b07bb DM |
47 | prom_early_allocated += size; |
48 | ||
49 | return ret; | |
50 | } | |
51 | ||
372b07bb DM |
52 | /* The following routines deal with the black magic of fully naming a |
53 | * node. | |
54 | * | |
55 | * Certain well known named nodes are just the simple name string. | |
56 | * | |
57 | * Actual devices have an address specifier appended to the base name | |
58 | * string, like this "foo@addr". The "addr" can be in any number of | |
59 | * formats, and the platform plus the type of the node determine the | |
60 | * format and how it is constructed. | |
61 | * | |
62 | * For children of the ROOT node, the naming convention is fixed and | |
63 | * determined by whether this is a sun4u or sun4v system. | |
64 | * | |
65 | * For children of other nodes, it is bus type specific. So | |
66 | * we walk up the tree until we discover a "device_type" property | |
67 | * we recognize and we go from there. | |
68 | * | |
69 | * As an example, the boot device on my workstation has a full path: | |
70 | * | |
71 | * /pci@1e,600000/ide@d/disk@0,0:c | |
72 | */ | |
73 | static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf) | |
74 | { | |
75 | struct linux_prom64_registers *regs; | |
76 | struct property *rprop; | |
77 | u32 high_bits, low_bits, type; | |
78 | ||
79 | rprop = of_find_property(dp, "reg", NULL); | |
80 | if (!rprop) | |
81 | return; | |
82 | ||
83 | regs = rprop->value; | |
035ebefc | 84 | if (!of_node_is_root(dp->parent)) { |
372b07bb DM |
85 | sprintf(tmp_buf, "%s@%x,%x", |
86 | dp->name, | |
87 | (unsigned int) (regs->phys_addr >> 32UL), | |
88 | (unsigned int) (regs->phys_addr & 0xffffffffUL)); | |
89 | return; | |
90 | } | |
91 | ||
92 | type = regs->phys_addr >> 60UL; | |
93 | high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL; | |
94 | low_bits = (regs->phys_addr & 0xffffffffUL); | |
95 | ||
96 | if (type == 0 || type == 8) { | |
97 | const char *prefix = (type == 0) ? "m" : "i"; | |
98 | ||
99 | if (low_bits) | |
100 | sprintf(tmp_buf, "%s@%s%x,%x", | |
101 | dp->name, prefix, | |
102 | high_bits, low_bits); | |
103 | else | |
104 | sprintf(tmp_buf, "%s@%s%x", | |
105 | dp->name, | |
106 | prefix, | |
107 | high_bits); | |
108 | } else if (type == 12) { | |
109 | sprintf(tmp_buf, "%s@%x", | |
110 | dp->name, high_bits); | |
111 | } | |
112 | } | |
113 | ||
114 | static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf) | |
115 | { | |
116 | struct linux_prom64_registers *regs; | |
117 | struct property *prop; | |
118 | ||
119 | prop = of_find_property(dp, "reg", NULL); | |
120 | if (!prop) | |
121 | return; | |
122 | ||
123 | regs = prop->value; | |
035ebefc | 124 | if (!of_node_is_root(dp->parent)) { |
372b07bb DM |
125 | sprintf(tmp_buf, "%s@%x,%x", |
126 | dp->name, | |
127 | (unsigned int) (regs->phys_addr >> 32UL), | |
128 | (unsigned int) (regs->phys_addr & 0xffffffffUL)); | |
129 | return; | |
130 | } | |
131 | ||
132 | prop = of_find_property(dp, "upa-portid", NULL); | |
133 | if (!prop) | |
134 | prop = of_find_property(dp, "portid", NULL); | |
135 | if (prop) { | |
136 | unsigned long mask = 0xffffffffUL; | |
137 | ||
138 | if (tlb_type >= cheetah) | |
139 | mask = 0x7fffff; | |
140 | ||
141 | sprintf(tmp_buf, "%s@%x,%x", | |
142 | dp->name, | |
143 | *(u32 *)prop->value, | |
144 | (unsigned int) (regs->phys_addr & mask)); | |
145 | } | |
146 | } | |
147 | ||
148 | /* "name@slot,offset" */ | |
149 | static void __init sbus_path_component(struct device_node *dp, char *tmp_buf) | |
150 | { | |
151 | struct linux_prom_registers *regs; | |
152 | struct property *prop; | |
153 | ||
154 | prop = of_find_property(dp, "reg", NULL); | |
155 | if (!prop) | |
156 | return; | |
157 | ||
158 | regs = prop->value; | |
159 | sprintf(tmp_buf, "%s@%x,%x", | |
160 | dp->name, | |
161 | regs->which_io, | |
162 | regs->phys_addr); | |
163 | } | |
164 | ||
165 | /* "name@devnum[,func]" */ | |
166 | static void __init pci_path_component(struct device_node *dp, char *tmp_buf) | |
167 | { | |
168 | struct linux_prom_pci_registers *regs; | |
169 | struct property *prop; | |
170 | unsigned int devfn; | |
171 | ||
172 | prop = of_find_property(dp, "reg", NULL); | |
173 | if (!prop) | |
174 | return; | |
175 | ||
176 | regs = prop->value; | |
177 | devfn = (regs->phys_hi >> 8) & 0xff; | |
178 | if (devfn & 0x07) { | |
179 | sprintf(tmp_buf, "%s@%x,%x", | |
180 | dp->name, | |
181 | devfn >> 3, | |
182 | devfn & 0x07); | |
183 | } else { | |
184 | sprintf(tmp_buf, "%s@%x", | |
185 | dp->name, | |
186 | devfn >> 3); | |
187 | } | |
188 | } | |
189 | ||
190 | /* "name@UPA_PORTID,offset" */ | |
191 | static void __init upa_path_component(struct device_node *dp, char *tmp_buf) | |
192 | { | |
193 | struct linux_prom64_registers *regs; | |
194 | struct property *prop; | |
195 | ||
196 | prop = of_find_property(dp, "reg", NULL); | |
197 | if (!prop) | |
198 | return; | |
199 | ||
200 | regs = prop->value; | |
201 | ||
202 | prop = of_find_property(dp, "upa-portid", NULL); | |
203 | if (!prop) | |
204 | return; | |
205 | ||
206 | sprintf(tmp_buf, "%s@%x,%x", | |
207 | dp->name, | |
208 | *(u32 *) prop->value, | |
209 | (unsigned int) (regs->phys_addr & 0xffffffffUL)); | |
210 | } | |
211 | ||
212 | /* "name@reg" */ | |
213 | static void __init vdev_path_component(struct device_node *dp, char *tmp_buf) | |
214 | { | |
215 | struct property *prop; | |
216 | u32 *regs; | |
217 | ||
218 | prop = of_find_property(dp, "reg", NULL); | |
219 | if (!prop) | |
220 | return; | |
221 | ||
222 | regs = prop->value; | |
223 | ||
224 | sprintf(tmp_buf, "%s@%x", dp->name, *regs); | |
225 | } | |
226 | ||
227 | /* "name@addrhi,addrlo" */ | |
228 | static void __init ebus_path_component(struct device_node *dp, char *tmp_buf) | |
229 | { | |
230 | struct linux_prom64_registers *regs; | |
231 | struct property *prop; | |
232 | ||
233 | prop = of_find_property(dp, "reg", NULL); | |
234 | if (!prop) | |
235 | return; | |
236 | ||
237 | regs = prop->value; | |
238 | ||
239 | sprintf(tmp_buf, "%s@%x,%x", | |
240 | dp->name, | |
241 | (unsigned int) (regs->phys_addr >> 32UL), | |
242 | (unsigned int) (regs->phys_addr & 0xffffffffUL)); | |
243 | } | |
244 | ||
245 | /* "name@bus,addr" */ | |
246 | static void __init i2c_path_component(struct device_node *dp, char *tmp_buf) | |
247 | { | |
248 | struct property *prop; | |
249 | u32 *regs; | |
250 | ||
251 | prop = of_find_property(dp, "reg", NULL); | |
252 | if (!prop) | |
253 | return; | |
254 | ||
255 | regs = prop->value; | |
256 | ||
257 | /* This actually isn't right... should look at the #address-cells | |
258 | * property of the i2c bus node etc. etc. | |
259 | */ | |
260 | sprintf(tmp_buf, "%s@%x,%x", | |
261 | dp->name, regs[0], regs[1]); | |
262 | } | |
263 | ||
264 | /* "name@reg0[,reg1]" */ | |
265 | static void __init usb_path_component(struct device_node *dp, char *tmp_buf) | |
266 | { | |
267 | struct property *prop; | |
268 | u32 *regs; | |
269 | ||
270 | prop = of_find_property(dp, "reg", NULL); | |
271 | if (!prop) | |
272 | return; | |
273 | ||
274 | regs = prop->value; | |
275 | ||
276 | if (prop->length == sizeof(u32) || regs[1] == 1) { | |
277 | sprintf(tmp_buf, "%s@%x", | |
278 | dp->name, regs[0]); | |
279 | } else { | |
280 | sprintf(tmp_buf, "%s@%x,%x", | |
281 | dp->name, regs[0], regs[1]); | |
282 | } | |
283 | } | |
284 | ||
285 | /* "name@reg0reg1[,reg2reg3]" */ | |
286 | static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf) | |
287 | { | |
288 | struct property *prop; | |
289 | u32 *regs; | |
290 | ||
291 | prop = of_find_property(dp, "reg", NULL); | |
292 | if (!prop) | |
293 | return; | |
294 | ||
295 | regs = prop->value; | |
296 | ||
297 | if (regs[2] || regs[3]) { | |
298 | sprintf(tmp_buf, "%s@%08x%08x,%04x%08x", | |
299 | dp->name, regs[0], regs[1], regs[2], regs[3]); | |
300 | } else { | |
301 | sprintf(tmp_buf, "%s@%08x%08x", | |
302 | dp->name, regs[0], regs[1]); | |
303 | } | |
304 | } | |
305 | ||
306 | static void __init __build_path_component(struct device_node *dp, char *tmp_buf) | |
307 | { | |
308 | struct device_node *parent = dp->parent; | |
309 | ||
310 | if (parent != NULL) { | |
311 | if (!strcmp(parent->type, "pci") || | |
c91e2eca DM |
312 | !strcmp(parent->type, "pciex")) { |
313 | pci_path_component(dp, tmp_buf); | |
314 | return; | |
315 | } | |
316 | if (!strcmp(parent->type, "sbus")) { | |
317 | sbus_path_component(dp, tmp_buf); | |
318 | return; | |
319 | } | |
320 | if (!strcmp(parent->type, "upa")) { | |
321 | upa_path_component(dp, tmp_buf); | |
322 | return; | |
323 | } | |
324 | if (!strcmp(parent->type, "ebus")) { | |
325 | ebus_path_component(dp, tmp_buf); | |
326 | return; | |
327 | } | |
372b07bb | 328 | if (!strcmp(parent->name, "usb") || |
c91e2eca DM |
329 | !strcmp(parent->name, "hub")) { |
330 | usb_path_component(dp, tmp_buf); | |
331 | return; | |
332 | } | |
333 | if (!strcmp(parent->type, "i2c")) { | |
334 | i2c_path_component(dp, tmp_buf); | |
335 | return; | |
336 | } | |
337 | if (!strcmp(parent->type, "firewire")) { | |
338 | ieee1394_path_component(dp, tmp_buf); | |
339 | return; | |
340 | } | |
341 | if (!strcmp(parent->type, "virtual-devices")) { | |
342 | vdev_path_component(dp, tmp_buf); | |
343 | return; | |
344 | } | |
372b07bb DM |
345 | /* "isa" is handled with platform naming */ |
346 | } | |
347 | ||
348 | /* Use platform naming convention. */ | |
c91e2eca DM |
349 | if (tlb_type == hypervisor) { |
350 | sun4v_path_component(dp, tmp_buf); | |
351 | return; | |
352 | } else { | |
353 | sun4u_path_component(dp, tmp_buf); | |
354 | } | |
372b07bb DM |
355 | } |
356 | ||
6524036a | 357 | char * __init build_path_component(struct device_node *dp) |
372b07bb DM |
358 | { |
359 | char tmp_buf[64], *n; | |
360 | ||
361 | tmp_buf[0] = '\0'; | |
362 | __build_path_component(dp, tmp_buf); | |
363 | if (tmp_buf[0] == '\0') | |
364 | strcpy(tmp_buf, dp->name); | |
365 | ||
366 | n = prom_early_alloc(strlen(tmp_buf) + 1); | |
367 | strcpy(n, tmp_buf); | |
368 | ||
369 | return n; | |
370 | } | |
371 | ||
5cbc3073 DM |
372 | static const char *get_mid_prop(void) |
373 | { | |
374 | return (tlb_type == spitfire ? "upa-portid" : "portid"); | |
375 | } | |
376 | ||
9bab5414 | 377 | static void *of_iterate_over_cpus(void *(*func)(struct device_node *, int, int), int arg) |
5cbc3073 DM |
378 | { |
379 | struct device_node *dp; | |
23dc758e DM |
380 | const char *mid_prop; |
381 | ||
23dc758e | 382 | mid_prop = get_mid_prop(); |
5cbc3073 DM |
383 | for_each_node_by_type(dp, "cpu") { |
384 | int cpuid = of_getintprop_default(dp, mid_prop, -1); | |
385 | const char *this_mid_prop = mid_prop; | |
9bab5414 | 386 | void *ret; |
5cbc3073 | 387 | |
5cbc3073 DM |
388 | if (cpuid < 0) { |
389 | this_mid_prop = "cpuid"; | |
390 | cpuid = of_getintprop_default(dp, this_mid_prop, -1); | |
5cbc3073 | 391 | } |
5cbc3073 DM |
392 | if (cpuid < 0) { |
393 | prom_printf("OF: Serious problem, cpu lacks " | |
394 | "%s property", this_mid_prop); | |
395 | prom_halt(); | |
396 | } | |
5cbc3073 | 397 | #ifdef CONFIG_SMP |
8a177c4f DM |
398 | if (cpuid >= NR_CPUS) { |
399 | printk(KERN_WARNING "Ignoring CPU %d which is " | |
400 | ">= NR_CPUS (%d)\n", | |
401 | cpuid, NR_CPUS); | |
5cbc3073 | 402 | continue; |
8a177c4f | 403 | } |
5cbc3073 | 404 | #endif |
9bab5414 DM |
405 | ret = func(dp, cpuid, arg); |
406 | if (ret) | |
407 | return ret; | |
408 | } | |
409 | return NULL; | |
410 | } | |
5cbc3073 | 411 | |
9bab5414 DM |
412 | static void *check_cpu_node(struct device_node *dp, int cpuid, int id) |
413 | { | |
414 | if (id == cpuid) | |
415 | return dp; | |
416 | return NULL; | |
417 | } | |
418 | ||
419 | struct device_node *of_find_node_by_cpuid(int cpuid) | |
420 | { | |
421 | return of_iterate_over_cpus(check_cpu_node, cpuid); | |
422 | } | |
423 | ||
424 | static void *record_one_cpu(struct device_node *dp, int cpuid, int arg) | |
425 | { | |
426 | ncpus_probed++; | |
a2f9f6bb | 427 | #ifdef CONFIG_SMP |
9bab5414 DM |
428 | set_cpu_present(cpuid, true); |
429 | set_cpu_possible(cpuid, true); | |
a2f9f6bb | 430 | #endif |
9bab5414 DM |
431 | return NULL; |
432 | } | |
5cbc3073 | 433 | |
9bab5414 DM |
434 | void __init of_populate_present_mask(void) |
435 | { | |
436 | if (tlb_type == hypervisor) | |
437 | return; | |
438 | ||
439 | ncpus_probed = 0; | |
440 | of_iterate_over_cpus(record_one_cpu, 0); | |
441 | } | |
5cbc3073 | 442 | |
9bab5414 DM |
443 | static void *fill_in_one_cpu(struct device_node *dp, int cpuid, int arg) |
444 | { | |
445 | struct device_node *portid_parent = NULL; | |
446 | int portid = -1; | |
447 | ||
448 | if (of_find_property(dp, "cpuid", NULL)) { | |
449 | int limit = 2; | |
450 | ||
451 | portid_parent = dp; | |
452 | while (limit--) { | |
453 | portid_parent = portid_parent->parent; | |
454 | if (!portid_parent) | |
455 | break; | |
456 | portid = of_getintprop_default(portid_parent, | |
457 | "portid", -1); | |
458 | if (portid >= 0) | |
459 | break; | |
460 | } | |
461 | } | |
462 | ||
463 | #ifndef CONFIG_SMP | |
464 | /* On uniprocessor we only want the values for the | |
465 | * real physical cpu the kernel booted onto, however | |
466 | * cpu_data() only has one entry at index 0. | |
467 | */ | |
468 | if (cpuid != real_hard_smp_processor_id()) | |
469 | return NULL; | |
470 | cpuid = 0; | |
471 | #endif | |
472 | ||
473 | cpu_data(cpuid).clock_tick = | |
474 | of_getintprop_default(dp, "clock-frequency", 0); | |
475 | ||
476 | if (portid_parent) { | |
477 | cpu_data(cpuid).dcache_size = | |
478 | of_getintprop_default(dp, "l1-dcache-size", | |
479 | 16 * 1024); | |
480 | cpu_data(cpuid).dcache_line_size = | |
481 | of_getintprop_default(dp, "l1-dcache-line-size", | |
482 | 32); | |
483 | cpu_data(cpuid).icache_size = | |
484 | of_getintprop_default(dp, "l1-icache-size", | |
485 | 8 * 1024); | |
486 | cpu_data(cpuid).icache_line_size = | |
487 | of_getintprop_default(dp, "l1-icache-line-size", | |
488 | 32); | |
489 | cpu_data(cpuid).ecache_size = | |
490 | of_getintprop_default(dp, "l2-cache-size", 0); | |
491 | cpu_data(cpuid).ecache_line_size = | |
492 | of_getintprop_default(dp, "l2-cache-line-size", 0); | |
493 | if (!cpu_data(cpuid).ecache_size || | |
494 | !cpu_data(cpuid).ecache_line_size) { | |
5cbc3073 | 495 | cpu_data(cpuid).ecache_size = |
9bab5414 DM |
496 | of_getintprop_default(portid_parent, |
497 | "l2-cache-size", | |
5cbc3073 DM |
498 | (4 * 1024 * 1024)); |
499 | cpu_data(cpuid).ecache_line_size = | |
9bab5414 DM |
500 | of_getintprop_default(portid_parent, |
501 | "l2-cache-line-size", 64); | |
5cbc3073 DM |
502 | } |
503 | ||
9bab5414 DM |
504 | cpu_data(cpuid).core_id = portid + 1; |
505 | cpu_data(cpuid).proc_id = portid; | |
5cbc3073 | 506 | #ifdef CONFIG_SMP |
9bab5414 | 507 | sparc64_multi_core = 1; |
5cbc3073 | 508 | #endif |
9bab5414 DM |
509 | } else { |
510 | cpu_data(cpuid).dcache_size = | |
511 | of_getintprop_default(dp, "dcache-size", 16 * 1024); | |
512 | cpu_data(cpuid).dcache_line_size = | |
513 | of_getintprop_default(dp, "dcache-line-size", 32); | |
514 | ||
515 | cpu_data(cpuid).icache_size = | |
516 | of_getintprop_default(dp, "icache-size", 16 * 1024); | |
517 | cpu_data(cpuid).icache_line_size = | |
518 | of_getintprop_default(dp, "icache-line-size", 32); | |
519 | ||
520 | cpu_data(cpuid).ecache_size = | |
521 | of_getintprop_default(dp, "ecache-size", | |
522 | (4 * 1024 * 1024)); | |
523 | cpu_data(cpuid).ecache_line_size = | |
524 | of_getintprop_default(dp, "ecache-line-size", 64); | |
525 | ||
526 | cpu_data(cpuid).core_id = 0; | |
527 | cpu_data(cpuid).proc_id = -1; | |
5cbc3073 DM |
528 | } |
529 | ||
9bab5414 DM |
530 | return NULL; |
531 | } | |
532 | ||
533 | void __init of_fill_in_cpu_data(void) | |
534 | { | |
535 | if (tlb_type == hypervisor) | |
536 | return; | |
537 | ||
9bab5414 DM |
538 | of_iterate_over_cpus(fill_in_one_cpu, 0); |
539 | ||
5cbc3073 DM |
540 | smp_fill_in_sib_core_maps(); |
541 | } | |
542 | ||
23dc758e | 543 | void __init of_console_init(void) |
c73fcc84 DM |
544 | { |
545 | char *msg = "OF stdout device is: %s\n"; | |
546 | struct device_node *dp; | |
547 | const char *type; | |
548 | phandle node; | |
549 | ||
550 | of_console_path = prom_early_alloc(256); | |
551 | if (prom_ihandle2path(prom_stdout, of_console_path, 256) < 0) { | |
552 | prom_printf("Cannot obtain path of stdout.\n"); | |
553 | prom_halt(); | |
554 | } | |
555 | of_console_options = strrchr(of_console_path, ':'); | |
556 | if (of_console_options) { | |
557 | of_console_options++; | |
558 | if (*of_console_options == '\0') | |
559 | of_console_options = NULL; | |
560 | } | |
561 | ||
562 | node = prom_inst2pkg(prom_stdout); | |
563 | if (!node) { | |
564 | prom_printf("Cannot resolve stdout node from " | |
565 | "instance %08x.\n", prom_stdout); | |
566 | prom_halt(); | |
567 | } | |
568 | ||
569 | dp = of_find_node_by_phandle(node); | |
570 | type = of_get_property(dp, "device_type", NULL); | |
571 | if (!type) { | |
572 | prom_printf("Console stdout lacks device_type property.\n"); | |
573 | prom_halt(); | |
574 | } | |
575 | ||
576 | if (strcmp(type, "display") && strcmp(type, "serial")) { | |
577 | prom_printf("Console device_type is neither display " | |
578 | "nor serial.\n"); | |
579 | prom_halt(); | |
580 | } | |
581 | ||
582 | of_console_device = dp; | |
583 | ||
c73fcc84 DM |
584 | printk(msg, of_console_path); |
585 | } |