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1/*
2 * Procedures for creating, accessing and interpreting the device tree.
3 *
4 * Paul Mackerras August 1996.
5 * Copyright (C) 1996-2005 Paul Mackerras.
6 *
7 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
8 * {engebret|bergner}@us.ibm.com
9 *
10 * Adapted for sparc64 by David S. Miller davem@davemloft.net
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 */
17
18#include <linux/kernel.h>
19#include <linux/types.h>
20#include <linux/string.h>
21#include <linux/mm.h>
22#include <linux/memblock.h>
23#include <linux/of.h>
24
25#include <asm/prom.h>
26#include <asm/oplib.h>
27#include <asm/irq.h>
28#include <asm/asi.h>
29#include <asm/upa.h>
30#include <asm/smp.h>
31
32#include "prom.h"
33
34void * __init prom_early_alloc(unsigned long size)
35{
36 unsigned long paddr = memblock_alloc(size, SMP_CACHE_BYTES);
37 void *ret;
38
39 if (!paddr) {
40 prom_printf("prom_early_alloc(%lu) failed\n");
41 prom_halt();
42 }
43
44 ret = __va(paddr);
45 memset(ret, 0, size);
46 prom_early_allocated += size;
47
48 return ret;
49}
50
51/* The following routines deal with the black magic of fully naming a
52 * node.
53 *
54 * Certain well known named nodes are just the simple name string.
55 *
56 * Actual devices have an address specifier appended to the base name
57 * string, like this "foo@addr". The "addr" can be in any number of
58 * formats, and the platform plus the type of the node determine the
59 * format and how it is constructed.
60 *
61 * For children of the ROOT node, the naming convention is fixed and
62 * determined by whether this is a sun4u or sun4v system.
63 *
64 * For children of other nodes, it is bus type specific. So
65 * we walk up the tree until we discover a "device_type" property
66 * we recognize and we go from there.
67 *
68 * As an example, the boot device on my workstation has a full path:
69 *
70 * /pci@1e,600000/ide@d/disk@0,0:c
71 */
72static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
73{
74 struct linux_prom64_registers *regs;
75 struct property *rprop;
76 u32 high_bits, low_bits, type;
77
78 rprop = of_find_property(dp, "reg", NULL);
79 if (!rprop)
80 return;
81
82 regs = rprop->value;
83 if (!of_node_is_root(dp->parent)) {
84 sprintf(tmp_buf, "%s@%x,%x",
85 dp->name,
86 (unsigned int) (regs->phys_addr >> 32UL),
87 (unsigned int) (regs->phys_addr & 0xffffffffUL));
88 return;
89 }
90
91 type = regs->phys_addr >> 60UL;
92 high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
93 low_bits = (regs->phys_addr & 0xffffffffUL);
94
95 if (type == 0 || type == 8) {
96 const char *prefix = (type == 0) ? "m" : "i";
97
98 if (low_bits)
99 sprintf(tmp_buf, "%s@%s%x,%x",
100 dp->name, prefix,
101 high_bits, low_bits);
102 else
103 sprintf(tmp_buf, "%s@%s%x",
104 dp->name,
105 prefix,
106 high_bits);
107 } else if (type == 12) {
108 sprintf(tmp_buf, "%s@%x",
109 dp->name, high_bits);
110 }
111}
112
113static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
114{
115 struct linux_prom64_registers *regs;
116 struct property *prop;
117
118 prop = of_find_property(dp, "reg", NULL);
119 if (!prop)
120 return;
121
122 regs = prop->value;
123 if (!of_node_is_root(dp->parent)) {
124 sprintf(tmp_buf, "%s@%x,%x",
125 dp->name,
126 (unsigned int) (regs->phys_addr >> 32UL),
127 (unsigned int) (regs->phys_addr & 0xffffffffUL));
128 return;
129 }
130
131 prop = of_find_property(dp, "upa-portid", NULL);
132 if (!prop)
133 prop = of_find_property(dp, "portid", NULL);
134 if (prop) {
135 unsigned long mask = 0xffffffffUL;
136
137 if (tlb_type >= cheetah)
138 mask = 0x7fffff;
139
140 sprintf(tmp_buf, "%s@%x,%x",
141 dp->name,
142 *(u32 *)prop->value,
143 (unsigned int) (regs->phys_addr & mask));
144 }
145}
146
147/* "name@slot,offset" */
148static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
149{
150 struct linux_prom_registers *regs;
151 struct property *prop;
152
153 prop = of_find_property(dp, "reg", NULL);
154 if (!prop)
155 return;
156
157 regs = prop->value;
158 sprintf(tmp_buf, "%s@%x,%x",
159 dp->name,
160 regs->which_io,
161 regs->phys_addr);
162}
163
164/* "name@devnum[,func]" */
165static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
166{
167 struct linux_prom_pci_registers *regs;
168 struct property *prop;
169 unsigned int devfn;
170
171 prop = of_find_property(dp, "reg", NULL);
172 if (!prop)
173 return;
174
175 regs = prop->value;
176 devfn = (regs->phys_hi >> 8) & 0xff;
177 if (devfn & 0x07) {
178 sprintf(tmp_buf, "%s@%x,%x",
179 dp->name,
180 devfn >> 3,
181 devfn & 0x07);
182 } else {
183 sprintf(tmp_buf, "%s@%x",
184 dp->name,
185 devfn >> 3);
186 }
187}
188
189/* "name@UPA_PORTID,offset" */
190static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
191{
192 struct linux_prom64_registers *regs;
193 struct property *prop;
194
195 prop = of_find_property(dp, "reg", NULL);
196 if (!prop)
197 return;
198
199 regs = prop->value;
200
201 prop = of_find_property(dp, "upa-portid", NULL);
202 if (!prop)
203 return;
204
205 sprintf(tmp_buf, "%s@%x,%x",
206 dp->name,
207 *(u32 *) prop->value,
208 (unsigned int) (regs->phys_addr & 0xffffffffUL));
209}
210
211/* "name@reg" */
212static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
213{
214 struct property *prop;
215 u32 *regs;
216
217 prop = of_find_property(dp, "reg", NULL);
218 if (!prop)
219 return;
220
221 regs = prop->value;
222
223 sprintf(tmp_buf, "%s@%x", dp->name, *regs);
224}
225
226/* "name@addrhi,addrlo" */
227static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
228{
229 struct linux_prom64_registers *regs;
230 struct property *prop;
231
232 prop = of_find_property(dp, "reg", NULL);
233 if (!prop)
234 return;
235
236 regs = prop->value;
237
238 sprintf(tmp_buf, "%s@%x,%x",
239 dp->name,
240 (unsigned int) (regs->phys_addr >> 32UL),
241 (unsigned int) (regs->phys_addr & 0xffffffffUL));
242}
243
244/* "name@bus,addr" */
245static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
246{
247 struct property *prop;
248 u32 *regs;
249
250 prop = of_find_property(dp, "reg", NULL);
251 if (!prop)
252 return;
253
254 regs = prop->value;
255
256 /* This actually isn't right... should look at the #address-cells
257 * property of the i2c bus node etc. etc.
258 */
259 sprintf(tmp_buf, "%s@%x,%x",
260 dp->name, regs[0], regs[1]);
261}
262
263/* "name@reg0[,reg1]" */
264static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
265{
266 struct property *prop;
267 u32 *regs;
268
269 prop = of_find_property(dp, "reg", NULL);
270 if (!prop)
271 return;
272
273 regs = prop->value;
274
275 if (prop->length == sizeof(u32) || regs[1] == 1) {
276 sprintf(tmp_buf, "%s@%x",
277 dp->name, regs[0]);
278 } else {
279 sprintf(tmp_buf, "%s@%x,%x",
280 dp->name, regs[0], regs[1]);
281 }
282}
283
284/* "name@reg0reg1[,reg2reg3]" */
285static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
286{
287 struct property *prop;
288 u32 *regs;
289
290 prop = of_find_property(dp, "reg", NULL);
291 if (!prop)
292 return;
293
294 regs = prop->value;
295
296 if (regs[2] || regs[3]) {
297 sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
298 dp->name, regs[0], regs[1], regs[2], regs[3]);
299 } else {
300 sprintf(tmp_buf, "%s@%08x%08x",
301 dp->name, regs[0], regs[1]);
302 }
303}
304
305static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
306{
307 struct device_node *parent = dp->parent;
308
309 if (parent != NULL) {
310 if (!strcmp(parent->type, "pci") ||
311 !strcmp(parent->type, "pciex")) {
312 pci_path_component(dp, tmp_buf);
313 return;
314 }
315 if (!strcmp(parent->type, "sbus")) {
316 sbus_path_component(dp, tmp_buf);
317 return;
318 }
319 if (!strcmp(parent->type, "upa")) {
320 upa_path_component(dp, tmp_buf);
321 return;
322 }
323 if (!strcmp(parent->type, "ebus")) {
324 ebus_path_component(dp, tmp_buf);
325 return;
326 }
327 if (!strcmp(parent->name, "usb") ||
328 !strcmp(parent->name, "hub")) {
329 usb_path_component(dp, tmp_buf);
330 return;
331 }
332 if (!strcmp(parent->type, "i2c")) {
333 i2c_path_component(dp, tmp_buf);
334 return;
335 }
336 if (!strcmp(parent->type, "firewire")) {
337 ieee1394_path_component(dp, tmp_buf);
338 return;
339 }
340 if (!strcmp(parent->type, "virtual-devices")) {
341 vdev_path_component(dp, tmp_buf);
342 return;
343 }
344 /* "isa" is handled with platform naming */
345 }
346
347 /* Use platform naming convention. */
348 if (tlb_type == hypervisor) {
349 sun4v_path_component(dp, tmp_buf);
350 return;
351 } else {
352 sun4u_path_component(dp, tmp_buf);
353 }
354}
355
356char * __init build_path_component(struct device_node *dp)
357{
358 char tmp_buf[64], *n;
359
360 tmp_buf[0] = '\0';
361 __build_path_component(dp, tmp_buf);
362 if (tmp_buf[0] == '\0')
363 strcpy(tmp_buf, dp->name);
364
365 n = prom_early_alloc(strlen(tmp_buf) + 1);
366 strcpy(n, tmp_buf);
367
368 return n;
369}
370
371static const char *get_mid_prop(void)
372{
373 return (tlb_type == spitfire ? "upa-portid" : "portid");
374}
375
376static void *of_iterate_over_cpus(void *(*func)(struct device_node *, int, int), int arg)
377{
378 struct device_node *dp;
379 const char *mid_prop;
380
381 mid_prop = get_mid_prop();
382 for_each_node_by_type(dp, "cpu") {
383 int cpuid = of_getintprop_default(dp, mid_prop, -1);
384 const char *this_mid_prop = mid_prop;
385 void *ret;
386
387 if (cpuid < 0) {
388 this_mid_prop = "cpuid";
389 cpuid = of_getintprop_default(dp, this_mid_prop, -1);
390 }
391 if (cpuid < 0) {
392 prom_printf("OF: Serious problem, cpu lacks "
393 "%s property", this_mid_prop);
394 prom_halt();
395 }
396#ifdef CONFIG_SMP
397 if (cpuid >= NR_CPUS) {
398 printk(KERN_WARNING "Ignoring CPU %d which is "
399 ">= NR_CPUS (%d)\n",
400 cpuid, NR_CPUS);
401 continue;
402 }
403#endif
404 ret = func(dp, cpuid, arg);
405 if (ret)
406 return ret;
407 }
408 return NULL;
409}
410
411static void *check_cpu_node(struct device_node *dp, int cpuid, int id)
412{
413 if (id == cpuid)
414 return dp;
415 return NULL;
416}
417
418struct device_node *of_find_node_by_cpuid(int cpuid)
419{
420 return of_iterate_over_cpus(check_cpu_node, cpuid);
421}
422
423static void *record_one_cpu(struct device_node *dp, int cpuid, int arg)
424{
425 ncpus_probed++;
426#ifdef CONFIG_SMP
427 set_cpu_present(cpuid, true);
428 set_cpu_possible(cpuid, true);
429#endif
430 return NULL;
431}
432
433void __init of_populate_present_mask(void)
434{
435 if (tlb_type == hypervisor)
436 return;
437
438 ncpus_probed = 0;
439 of_iterate_over_cpus(record_one_cpu, 0);
440}
441
442static void *fill_in_one_cpu(struct device_node *dp, int cpuid, int arg)
443{
444 struct device_node *portid_parent = NULL;
445 int portid = -1;
446
447 if (of_find_property(dp, "cpuid", NULL)) {
448 int limit = 2;
449
450 portid_parent = dp;
451 while (limit--) {
452 portid_parent = portid_parent->parent;
453 if (!portid_parent)
454 break;
455 portid = of_getintprop_default(portid_parent,
456 "portid", -1);
457 if (portid >= 0)
458 break;
459 }
460 }
461
462#ifndef CONFIG_SMP
463 /* On uniprocessor we only want the values for the
464 * real physical cpu the kernel booted onto, however
465 * cpu_data() only has one entry at index 0.
466 */
467 if (cpuid != real_hard_smp_processor_id())
468 return NULL;
469 cpuid = 0;
470#endif
471
472 cpu_data(cpuid).clock_tick =
473 of_getintprop_default(dp, "clock-frequency", 0);
474
475 if (portid_parent) {
476 cpu_data(cpuid).dcache_size =
477 of_getintprop_default(dp, "l1-dcache-size",
478 16 * 1024);
479 cpu_data(cpuid).dcache_line_size =
480 of_getintprop_default(dp, "l1-dcache-line-size",
481 32);
482 cpu_data(cpuid).icache_size =
483 of_getintprop_default(dp, "l1-icache-size",
484 8 * 1024);
485 cpu_data(cpuid).icache_line_size =
486 of_getintprop_default(dp, "l1-icache-line-size",
487 32);
488 cpu_data(cpuid).ecache_size =
489 of_getintprop_default(dp, "l2-cache-size", 0);
490 cpu_data(cpuid).ecache_line_size =
491 of_getintprop_default(dp, "l2-cache-line-size", 0);
492 if (!cpu_data(cpuid).ecache_size ||
493 !cpu_data(cpuid).ecache_line_size) {
494 cpu_data(cpuid).ecache_size =
495 of_getintprop_default(portid_parent,
496 "l2-cache-size",
497 (4 * 1024 * 1024));
498 cpu_data(cpuid).ecache_line_size =
499 of_getintprop_default(portid_parent,
500 "l2-cache-line-size", 64);
501 }
502
503 cpu_data(cpuid).core_id = portid + 1;
504 cpu_data(cpuid).proc_id = portid;
505#ifdef CONFIG_SMP
506 sparc64_multi_core = 1;
507#endif
508 } else {
509 cpu_data(cpuid).dcache_size =
510 of_getintprop_default(dp, "dcache-size", 16 * 1024);
511 cpu_data(cpuid).dcache_line_size =
512 of_getintprop_default(dp, "dcache-line-size", 32);
513
514 cpu_data(cpuid).icache_size =
515 of_getintprop_default(dp, "icache-size", 16 * 1024);
516 cpu_data(cpuid).icache_line_size =
517 of_getintprop_default(dp, "icache-line-size", 32);
518
519 cpu_data(cpuid).ecache_size =
520 of_getintprop_default(dp, "ecache-size",
521 (4 * 1024 * 1024));
522 cpu_data(cpuid).ecache_line_size =
523 of_getintprop_default(dp, "ecache-line-size", 64);
524
525 cpu_data(cpuid).core_id = 0;
526 cpu_data(cpuid).proc_id = -1;
527 }
528
529 return NULL;
530}
531
532void __init of_fill_in_cpu_data(void)
533{
534 if (tlb_type == hypervisor)
535 return;
536
537 of_iterate_over_cpus(fill_in_one_cpu, 0);
538
539 smp_fill_in_sib_core_maps();
540}
541
542void __init of_console_init(void)
543{
544 char *msg = "OF stdout device is: %s\n";
545 struct device_node *dp;
546 const char *type;
547 phandle node;
548
549 of_console_path = prom_early_alloc(256);
550 if (prom_ihandle2path(prom_stdout, of_console_path, 256) < 0) {
551 prom_printf("Cannot obtain path of stdout.\n");
552 prom_halt();
553 }
554 of_console_options = strrchr(of_console_path, ':');
555 if (of_console_options) {
556 of_console_options++;
557 if (*of_console_options == '\0')
558 of_console_options = NULL;
559 }
560
561 node = prom_inst2pkg(prom_stdout);
562 if (!node) {
563 prom_printf("Cannot resolve stdout node from "
564 "instance %08x.\n", prom_stdout);
565 prom_halt();
566 }
567
568 dp = of_find_node_by_phandle(node);
569 type = of_get_property(dp, "device_type", NULL);
570 if (!type) {
571 prom_printf("Console stdout lacks device_type property.\n");
572 prom_halt();
573 }
574
575 if (strcmp(type, "display") && strcmp(type, "serial")) {
576 prom_printf("Console device_type is neither display "
577 "nor serial.\n");
578 prom_halt();
579 }
580
581 of_console_device = dp;
582
583 printk(msg, of_console_path);
584}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Procedures for creating, accessing and interpreting the device tree.
4 *
5 * Paul Mackerras August 1996.
6 * Copyright (C) 1996-2005 Paul Mackerras.
7 *
8 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
9 * {engebret|bergner}@us.ibm.com
10 *
11 * Adapted for sparc64 by David S. Miller davem@davemloft.net
12 */
13
14#include <linux/memblock.h>
15#include <linux/kernel.h>
16#include <linux/string.h>
17#include <linux/types.h>
18#include <linux/cpu.h>
19#include <linux/mm.h>
20#include <linux/of.h>
21
22#include <asm/prom.h>
23#include <asm/oplib.h>
24#include <asm/irq.h>
25#include <asm/asi.h>
26#include <asm/upa.h>
27#include <asm/smp.h>
28
29#include "prom.h"
30
31void * __init prom_early_alloc(unsigned long size)
32{
33 void *ret = memblock_alloc(size, SMP_CACHE_BYTES);
34
35 if (!ret) {
36 prom_printf("prom_early_alloc(%lu) failed\n", size);
37 prom_halt();
38 }
39
40 prom_early_allocated += size;
41
42 return ret;
43}
44
45/* The following routines deal with the black magic of fully naming a
46 * node.
47 *
48 * Certain well known named nodes are just the simple name string.
49 *
50 * Actual devices have an address specifier appended to the base name
51 * string, like this "foo@addr". The "addr" can be in any number of
52 * formats, and the platform plus the type of the node determine the
53 * format and how it is constructed.
54 *
55 * For children of the ROOT node, the naming convention is fixed and
56 * determined by whether this is a sun4u or sun4v system.
57 *
58 * For children of other nodes, it is bus type specific. So
59 * we walk up the tree until we discover a "device_type" property
60 * we recognize and we go from there.
61 *
62 * As an example, the boot device on my workstation has a full path:
63 *
64 * /pci@1e,600000/ide@d/disk@0,0:c
65 */
66static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
67{
68 const char *name = of_get_property(dp, "name", NULL);
69 struct linux_prom64_registers *regs;
70 struct property *rprop;
71 u32 high_bits, low_bits, type;
72
73 rprop = of_find_property(dp, "reg", NULL);
74 if (!rprop)
75 return;
76
77 regs = rprop->value;
78 if (!of_node_is_root(dp->parent)) {
79 sprintf(tmp_buf, "%s@%x,%x",
80 name,
81 (unsigned int) (regs->phys_addr >> 32UL),
82 (unsigned int) (regs->phys_addr & 0xffffffffUL));
83 return;
84 }
85
86 type = regs->phys_addr >> 60UL;
87 high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
88 low_bits = (regs->phys_addr & 0xffffffffUL);
89
90 if (type == 0 || type == 8) {
91 const char *prefix = (type == 0) ? "m" : "i";
92
93 if (low_bits)
94 sprintf(tmp_buf, "%s@%s%x,%x",
95 name, prefix,
96 high_bits, low_bits);
97 else
98 sprintf(tmp_buf, "%s@%s%x",
99 name,
100 prefix,
101 high_bits);
102 } else if (type == 12) {
103 sprintf(tmp_buf, "%s@%x",
104 name, high_bits);
105 }
106}
107
108static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
109{
110 const char *name = of_get_property(dp, "name", NULL);
111 struct linux_prom64_registers *regs;
112 struct property *prop;
113
114 prop = of_find_property(dp, "reg", NULL);
115 if (!prop)
116 return;
117
118 regs = prop->value;
119 if (!of_node_is_root(dp->parent)) {
120 sprintf(tmp_buf, "%s@%x,%x",
121 name,
122 (unsigned int) (regs->phys_addr >> 32UL),
123 (unsigned int) (regs->phys_addr & 0xffffffffUL));
124 return;
125 }
126
127 prop = of_find_property(dp, "upa-portid", NULL);
128 if (!prop)
129 prop = of_find_property(dp, "portid", NULL);
130 if (prop) {
131 unsigned long mask = 0xffffffffUL;
132
133 if (tlb_type >= cheetah)
134 mask = 0x7fffff;
135
136 sprintf(tmp_buf, "%s@%x,%x",
137 name,
138 *(u32 *)prop->value,
139 (unsigned int) (regs->phys_addr & mask));
140 }
141}
142
143/* "name@slot,offset" */
144static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
145{
146 const char *name = of_get_property(dp, "name", NULL);
147 struct linux_prom_registers *regs;
148 struct property *prop;
149
150 prop = of_find_property(dp, "reg", NULL);
151 if (!prop)
152 return;
153
154 regs = prop->value;
155 sprintf(tmp_buf, "%s@%x,%x",
156 name,
157 regs->which_io,
158 regs->phys_addr);
159}
160
161/* "name@devnum[,func]" */
162static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
163{
164 const char *name = of_get_property(dp, "name", NULL);
165 struct linux_prom_pci_registers *regs;
166 struct property *prop;
167 unsigned int devfn;
168
169 prop = of_find_property(dp, "reg", NULL);
170 if (!prop)
171 return;
172
173 regs = prop->value;
174 devfn = (regs->phys_hi >> 8) & 0xff;
175 if (devfn & 0x07) {
176 sprintf(tmp_buf, "%s@%x,%x",
177 name,
178 devfn >> 3,
179 devfn & 0x07);
180 } else {
181 sprintf(tmp_buf, "%s@%x",
182 name,
183 devfn >> 3);
184 }
185}
186
187/* "name@UPA_PORTID,offset" */
188static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
189{
190 const char *name = of_get_property(dp, "name", NULL);
191 struct linux_prom64_registers *regs;
192 struct property *prop;
193
194 prop = of_find_property(dp, "reg", NULL);
195 if (!prop)
196 return;
197
198 regs = prop->value;
199
200 prop = of_find_property(dp, "upa-portid", NULL);
201 if (!prop)
202 return;
203
204 sprintf(tmp_buf, "%s@%x,%x",
205 name,
206 *(u32 *) prop->value,
207 (unsigned int) (regs->phys_addr & 0xffffffffUL));
208}
209
210/* "name@reg" */
211static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
212{
213 const char *name = of_get_property(dp, "name", NULL);
214 struct property *prop;
215 u32 *regs;
216
217 prop = of_find_property(dp, "reg", NULL);
218 if (!prop)
219 return;
220
221 regs = prop->value;
222
223 sprintf(tmp_buf, "%s@%x", name, *regs);
224}
225
226/* "name@addrhi,addrlo" */
227static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
228{
229 const char *name = of_get_property(dp, "name", NULL);
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 name,
241 (unsigned int) (regs->phys_addr >> 32UL),
242 (unsigned int) (regs->phys_addr & 0xffffffffUL));
243}
244
245/* "name@bus,addr" */
246static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
247{
248 const char *name = of_get_property(dp, "name", NULL);
249 struct property *prop;
250 u32 *regs;
251
252 prop = of_find_property(dp, "reg", NULL);
253 if (!prop)
254 return;
255
256 regs = prop->value;
257
258 /* This actually isn't right... should look at the #address-cells
259 * property of the i2c bus node etc. etc.
260 */
261 sprintf(tmp_buf, "%s@%x,%x",
262 name, regs[0], regs[1]);
263}
264
265/* "name@reg0[,reg1]" */
266static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
267{
268 const char *name = of_get_property(dp, "name", NULL);
269 struct property *prop;
270 u32 *regs;
271
272 prop = of_find_property(dp, "reg", NULL);
273 if (!prop)
274 return;
275
276 regs = prop->value;
277
278 if (prop->length == sizeof(u32) || regs[1] == 1) {
279 sprintf(tmp_buf, "%s@%x",
280 name, regs[0]);
281 } else {
282 sprintf(tmp_buf, "%s@%x,%x",
283 name, regs[0], regs[1]);
284 }
285}
286
287/* "name@reg0reg1[,reg2reg3]" */
288static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
289{
290 const char *name = of_get_property(dp, "name", NULL);
291 struct property *prop;
292 u32 *regs;
293
294 prop = of_find_property(dp, "reg", NULL);
295 if (!prop)
296 return;
297
298 regs = prop->value;
299
300 if (regs[2] || regs[3]) {
301 sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
302 name, regs[0], regs[1], regs[2], regs[3]);
303 } else {
304 sprintf(tmp_buf, "%s@%08x%08x",
305 name, regs[0], regs[1]);
306 }
307}
308
309static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
310{
311 struct device_node *parent = dp->parent;
312
313 if (parent != NULL) {
314 if (of_node_is_type(parent, "pci") ||
315 of_node_is_type(parent, "pciex")) {
316 pci_path_component(dp, tmp_buf);
317 return;
318 }
319 if (of_node_is_type(parent, "sbus")) {
320 sbus_path_component(dp, tmp_buf);
321 return;
322 }
323 if (of_node_is_type(parent, "upa")) {
324 upa_path_component(dp, tmp_buf);
325 return;
326 }
327 if (of_node_is_type(parent, "ebus")) {
328 ebus_path_component(dp, tmp_buf);
329 return;
330 }
331 if (of_node_name_eq(parent, "usb") ||
332 of_node_name_eq(parent, "hub")) {
333 usb_path_component(dp, tmp_buf);
334 return;
335 }
336 if (of_node_is_type(parent, "i2c")) {
337 i2c_path_component(dp, tmp_buf);
338 return;
339 }
340 if (of_node_is_type(parent, "firewire")) {
341 ieee1394_path_component(dp, tmp_buf);
342 return;
343 }
344 if (of_node_is_type(parent, "virtual-devices")) {
345 vdev_path_component(dp, tmp_buf);
346 return;
347 }
348 /* "isa" is handled with platform naming */
349 }
350
351 /* Use platform naming convention. */
352 if (tlb_type == hypervisor) {
353 sun4v_path_component(dp, tmp_buf);
354 return;
355 } else {
356 sun4u_path_component(dp, tmp_buf);
357 }
358}
359
360char * __init build_path_component(struct device_node *dp)
361{
362 const char *name = of_get_property(dp, "name", NULL);
363 char tmp_buf[64], *n;
364
365 tmp_buf[0] = '\0';
366 __build_path_component(dp, tmp_buf);
367 if (tmp_buf[0] == '\0')
368 strcpy(tmp_buf, name);
369
370 n = prom_early_alloc(strlen(tmp_buf) + 1);
371 strcpy(n, tmp_buf);
372
373 return n;
374}
375
376static const char *get_mid_prop(void)
377{
378 return (tlb_type == spitfire ? "upa-portid" : "portid");
379}
380
381bool arch_find_n_match_cpu_physical_id(struct device_node *cpun,
382 int cpu, unsigned int *thread)
383{
384 const char *mid_prop = get_mid_prop();
385 int this_cpu_id;
386
387 /* On hypervisor based platforms we interrogate the 'reg'
388 * property. On everything else we look for a 'upa-portid',
389 * 'portid', or 'cpuid' property.
390 */
391
392 if (tlb_type == hypervisor) {
393 struct property *prop = of_find_property(cpun, "reg", NULL);
394 u32 *regs;
395
396 if (!prop) {
397 pr_warn("CPU node missing reg property\n");
398 return false;
399 }
400 regs = prop->value;
401 this_cpu_id = regs[0] & 0x0fffffff;
402 } else {
403 this_cpu_id = of_getintprop_default(cpun, mid_prop, -1);
404
405 if (this_cpu_id < 0) {
406 mid_prop = "cpuid";
407 this_cpu_id = of_getintprop_default(cpun, mid_prop, -1);
408 }
409 if (this_cpu_id < 0) {
410 pr_warn("CPU node missing cpu ID property\n");
411 return false;
412 }
413 }
414 if (this_cpu_id == cpu) {
415 if (thread) {
416 int proc_id = cpu_data(cpu).proc_id;
417
418 /* On sparc64, the cpu thread information is obtained
419 * either from OBP or the machine description. We've
420 * actually probed this information already long before
421 * this interface gets called so instead of interrogating
422 * both the OF node and the MDESC again, just use what
423 * we discovered already.
424 */
425 if (proc_id < 0)
426 proc_id = 0;
427 *thread = proc_id;
428 }
429 return true;
430 }
431 return false;
432}
433
434static void *of_iterate_over_cpus(void *(*func)(struct device_node *, int, int), int arg)
435{
436 struct device_node *dp;
437 const char *mid_prop;
438
439 mid_prop = get_mid_prop();
440 for_each_node_by_type(dp, "cpu") {
441 int cpuid = of_getintprop_default(dp, mid_prop, -1);
442 const char *this_mid_prop = mid_prop;
443 void *ret;
444
445 if (cpuid < 0) {
446 this_mid_prop = "cpuid";
447 cpuid = of_getintprop_default(dp, this_mid_prop, -1);
448 }
449 if (cpuid < 0) {
450 prom_printf("OF: Serious problem, cpu lacks "
451 "%s property", this_mid_prop);
452 prom_halt();
453 }
454#ifdef CONFIG_SMP
455 if (cpuid >= NR_CPUS) {
456 printk(KERN_WARNING "Ignoring CPU %d which is "
457 ">= NR_CPUS (%d)\n",
458 cpuid, NR_CPUS);
459 continue;
460 }
461#endif
462 ret = func(dp, cpuid, arg);
463 if (ret)
464 return ret;
465 }
466 return NULL;
467}
468
469static void *check_cpu_node(struct device_node *dp, int cpuid, int id)
470{
471 if (id == cpuid)
472 return dp;
473 return NULL;
474}
475
476struct device_node *of_find_node_by_cpuid(int cpuid)
477{
478 return of_iterate_over_cpus(check_cpu_node, cpuid);
479}
480
481static void *record_one_cpu(struct device_node *dp, int cpuid, int arg)
482{
483 ncpus_probed++;
484#ifdef CONFIG_SMP
485 set_cpu_present(cpuid, true);
486 set_cpu_possible(cpuid, true);
487#endif
488 return NULL;
489}
490
491void __init of_populate_present_mask(void)
492{
493 if (tlb_type == hypervisor)
494 return;
495
496 ncpus_probed = 0;
497 of_iterate_over_cpus(record_one_cpu, 0);
498}
499
500static void *fill_in_one_cpu(struct device_node *dp, int cpuid, int arg)
501{
502 struct device_node *portid_parent = NULL;
503 int portid = -1;
504
505 if (of_find_property(dp, "cpuid", NULL)) {
506 int limit = 2;
507
508 portid_parent = dp;
509 while (limit--) {
510 portid_parent = portid_parent->parent;
511 if (!portid_parent)
512 break;
513 portid = of_getintprop_default(portid_parent,
514 "portid", -1);
515 if (portid >= 0)
516 break;
517 }
518 }
519
520#ifndef CONFIG_SMP
521 /* On uniprocessor we only want the values for the
522 * real physical cpu the kernel booted onto, however
523 * cpu_data() only has one entry at index 0.
524 */
525 if (cpuid != real_hard_smp_processor_id())
526 return NULL;
527 cpuid = 0;
528#endif
529
530 cpu_data(cpuid).clock_tick =
531 of_getintprop_default(dp, "clock-frequency", 0);
532
533 if (portid_parent) {
534 cpu_data(cpuid).dcache_size =
535 of_getintprop_default(dp, "l1-dcache-size",
536 16 * 1024);
537 cpu_data(cpuid).dcache_line_size =
538 of_getintprop_default(dp, "l1-dcache-line-size",
539 32);
540 cpu_data(cpuid).icache_size =
541 of_getintprop_default(dp, "l1-icache-size",
542 8 * 1024);
543 cpu_data(cpuid).icache_line_size =
544 of_getintprop_default(dp, "l1-icache-line-size",
545 32);
546 cpu_data(cpuid).ecache_size =
547 of_getintprop_default(dp, "l2-cache-size", 0);
548 cpu_data(cpuid).ecache_line_size =
549 of_getintprop_default(dp, "l2-cache-line-size", 0);
550 if (!cpu_data(cpuid).ecache_size ||
551 !cpu_data(cpuid).ecache_line_size) {
552 cpu_data(cpuid).ecache_size =
553 of_getintprop_default(portid_parent,
554 "l2-cache-size",
555 (4 * 1024 * 1024));
556 cpu_data(cpuid).ecache_line_size =
557 of_getintprop_default(portid_parent,
558 "l2-cache-line-size", 64);
559 }
560
561 cpu_data(cpuid).core_id = portid + 1;
562 cpu_data(cpuid).proc_id = portid;
563 } else {
564 cpu_data(cpuid).dcache_size =
565 of_getintprop_default(dp, "dcache-size", 16 * 1024);
566 cpu_data(cpuid).dcache_line_size =
567 of_getintprop_default(dp, "dcache-line-size", 32);
568
569 cpu_data(cpuid).icache_size =
570 of_getintprop_default(dp, "icache-size", 16 * 1024);
571 cpu_data(cpuid).icache_line_size =
572 of_getintprop_default(dp, "icache-line-size", 32);
573
574 cpu_data(cpuid).ecache_size =
575 of_getintprop_default(dp, "ecache-size",
576 (4 * 1024 * 1024));
577 cpu_data(cpuid).ecache_line_size =
578 of_getintprop_default(dp, "ecache-line-size", 64);
579
580 cpu_data(cpuid).core_id = 0;
581 cpu_data(cpuid).proc_id = -1;
582 }
583
584 return NULL;
585}
586
587void __init of_fill_in_cpu_data(void)
588{
589 if (tlb_type == hypervisor)
590 return;
591
592 of_iterate_over_cpus(fill_in_one_cpu, 0);
593
594 smp_fill_in_sib_core_maps();
595}
596
597void __init of_console_init(void)
598{
599 char *msg = "OF stdout device is: %s\n";
600 struct device_node *dp;
601 phandle node;
602
603 of_console_path = prom_early_alloc(256);
604 if (prom_ihandle2path(prom_stdout, of_console_path, 256) < 0) {
605 prom_printf("Cannot obtain path of stdout.\n");
606 prom_halt();
607 }
608 of_console_options = strrchr(of_console_path, ':');
609 if (of_console_options) {
610 of_console_options++;
611 if (*of_console_options == '\0')
612 of_console_options = NULL;
613 }
614
615 node = prom_inst2pkg(prom_stdout);
616 if (!node) {
617 prom_printf("Cannot resolve stdout node from "
618 "instance %08x.\n", prom_stdout);
619 prom_halt();
620 }
621
622 dp = of_find_node_by_phandle(node);
623
624 if (!of_node_is_type(dp, "display") && !of_node_is_type(dp, "serial")) {
625 prom_printf("Console device_type is neither display "
626 "nor serial.\n");
627 prom_halt();
628 }
629
630 of_console_device = dp;
631
632 printk(msg, of_console_path);
633}