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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 sparc32 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/bootmem.h>
23
24#include <asm/prom.h>
25#include <asm/oplib.h>
26#include <asm/leon.h>
27#include <asm/leon_amba.h>
28
29#include "prom.h"
30
31void * __init prom_early_alloc(unsigned long size)
32{
33 void *ret;
34
35 ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
36 if (ret != NULL)
37 memset(ret, 0, size);
38
39 prom_early_allocated += size;
40
41 return ret;
42}
43
44/* The following routines deal with the black magic of fully naming a
45 * node.
46 *
47 * Certain well known named nodes are just the simple name string.
48 *
49 * Actual devices have an address specifier appended to the base name
50 * string, like this "foo@addr". The "addr" can be in any number of
51 * formats, and the platform plus the type of the node determine the
52 * format and how it is constructed.
53 *
54 * For children of the ROOT node, the naming convention is fixed and
55 * determined by whether this is a sun4u or sun4v system.
56 *
57 * For children of other nodes, it is bus type specific. So
58 * we walk up the tree until we discover a "device_type" property
59 * we recognize and we go from there.
60 */
61static void __init sparc32_path_component(struct device_node *dp, char *tmp_buf)
62{
63 struct linux_prom_registers *regs;
64 struct property *rprop;
65
66 rprop = of_find_property(dp, "reg", NULL);
67 if (!rprop)
68 return;
69
70 regs = rprop->value;
71 sprintf(tmp_buf, "%s@%x,%x",
72 dp->name,
73 regs->which_io, regs->phys_addr);
74}
75
76/* "name@slot,offset" */
77static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
78{
79 struct linux_prom_registers *regs;
80 struct property *prop;
81
82 prop = of_find_property(dp, "reg", NULL);
83 if (!prop)
84 return;
85
86 regs = prop->value;
87 sprintf(tmp_buf, "%s@%x,%x",
88 dp->name,
89 regs->which_io,
90 regs->phys_addr);
91}
92
93/* "name@devnum[,func]" */
94static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
95{
96 struct linux_prom_pci_registers *regs;
97 struct property *prop;
98 unsigned int devfn;
99
100 prop = of_find_property(dp, "reg", NULL);
101 if (!prop)
102 return;
103
104 regs = prop->value;
105 devfn = (regs->phys_hi >> 8) & 0xff;
106 if (devfn & 0x07) {
107 sprintf(tmp_buf, "%s@%x,%x",
108 dp->name,
109 devfn >> 3,
110 devfn & 0x07);
111 } else {
112 sprintf(tmp_buf, "%s@%x",
113 dp->name,
114 devfn >> 3);
115 }
116}
117
118/* "name@addrhi,addrlo" */
119static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
120{
121 struct linux_prom_registers *regs;
122 struct property *prop;
123
124 prop = of_find_property(dp, "reg", NULL);
125 if (!prop)
126 return;
127
128 regs = prop->value;
129
130 sprintf(tmp_buf, "%s@%x,%x",
131 dp->name,
132 regs->which_io, regs->phys_addr);
133}
134
135/* "name:vendor:device@irq,addrlo" */
136static void __init ambapp_path_component(struct device_node *dp, char *tmp_buf)
137{
138 struct amba_prom_registers *regs;
139 unsigned int *intr, *device, *vendor, reg0;
140 struct property *prop;
141 int interrupt = 0;
142
143 /* In order to get a unique ID in the device tree (multiple AMBA devices
144 * may have the same name) the node number is printed
145 */
146 prop = of_find_property(dp, "reg", NULL);
147 if (!prop) {
148 reg0 = (unsigned int)dp->phandle;
149 } else {
150 regs = prop->value;
151 reg0 = regs->phys_addr;
152 }
153
154 /* Not all cores have Interrupt */
155 prop = of_find_property(dp, "interrupts", NULL);
156 if (!prop)
157 intr = &interrupt; /* IRQ0 does not exist */
158 else
159 intr = prop->value;
160
161 prop = of_find_property(dp, "vendor", NULL);
162 if (!prop)
163 return;
164 vendor = prop->value;
165 prop = of_find_property(dp, "device", NULL);
166 if (!prop)
167 return;
168 device = prop->value;
169
170 sprintf(tmp_buf, "%s:%d:%d@%x,%x",
171 dp->name, *vendor, *device,
172 *intr, reg0);
173}
174
175static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
176{
177 struct device_node *parent = dp->parent;
178
179 if (parent != NULL) {
180 if (!strcmp(parent->type, "pci") ||
181 !strcmp(parent->type, "pciex"))
182 return pci_path_component(dp, tmp_buf);
183 if (!strcmp(parent->type, "sbus"))
184 return sbus_path_component(dp, tmp_buf);
185 if (!strcmp(parent->type, "ebus"))
186 return ebus_path_component(dp, tmp_buf);
187 if (!strcmp(parent->type, "ambapp"))
188 return ambapp_path_component(dp, tmp_buf);
189
190 /* "isa" is handled with platform naming */
191 }
192
193 /* Use platform naming convention. */
194 return sparc32_path_component(dp, tmp_buf);
195}
196
197char * __init build_path_component(struct device_node *dp)
198{
199 char tmp_buf[64], *n;
200
201 tmp_buf[0] = '\0';
202 __build_path_component(dp, tmp_buf);
203 if (tmp_buf[0] == '\0')
204 strcpy(tmp_buf, dp->name);
205
206 n = prom_early_alloc(strlen(tmp_buf) + 1);
207 strcpy(n, tmp_buf);
208
209 return n;
210}
211
212extern void restore_current(void);
213
214void __init of_console_init(void)
215{
216 char *msg = "OF stdout device is: %s\n";
217 struct device_node *dp;
218 unsigned long flags;
219 const char *type;
220 phandle node;
221 int skip, tmp, fd;
222
223 of_console_path = prom_early_alloc(256);
224
225 switch (prom_vers) {
226 case PROM_V0:
227 skip = 0;
228 switch (*romvec->pv_stdout) {
229 case PROMDEV_SCREEN:
230 type = "display";
231 break;
232
233 case PROMDEV_TTYB:
234 skip = 1;
235 /* FALLTHRU */
236
237 case PROMDEV_TTYA:
238 type = "serial";
239 break;
240
241 default:
242 prom_printf("Invalid PROM_V0 stdout value %u\n",
243 *romvec->pv_stdout);
244 prom_halt();
245 }
246
247 tmp = skip;
248 for_each_node_by_type(dp, type) {
249 if (!tmp--)
250 break;
251 }
252 if (!dp) {
253 prom_printf("Cannot find PROM_V0 console node.\n");
254 prom_halt();
255 }
256 of_console_device = dp;
257
258 strcpy(of_console_path, dp->full_name);
259 if (!strcmp(type, "serial")) {
260 strcat(of_console_path,
261 (skip ? ":b" : ":a"));
262 }
263 break;
264
265 default:
266 case PROM_V2:
267 case PROM_V3:
268 fd = *romvec->pv_v2bootargs.fd_stdout;
269
270 spin_lock_irqsave(&prom_lock, flags);
271 node = (*romvec->pv_v2devops.v2_inst2pkg)(fd);
272 restore_current();
273 spin_unlock_irqrestore(&prom_lock, flags);
274
275 if (!node) {
276 prom_printf("Cannot resolve stdout node from "
277 "instance %08x.\n", fd);
278 prom_halt();
279 }
280 dp = of_find_node_by_phandle(node);
281 type = of_get_property(dp, "device_type", NULL);
282
283 if (!type) {
284 prom_printf("Console stdout lacks "
285 "device_type property.\n");
286 prom_halt();
287 }
288
289 if (strcmp(type, "display") && strcmp(type, "serial")) {
290 prom_printf("Console device_type is neither display "
291 "nor serial.\n");
292 prom_halt();
293 }
294
295 of_console_device = dp;
296
297 if (prom_vers == PROM_V2) {
298 strcpy(of_console_path, dp->full_name);
299 switch (*romvec->pv_stdout) {
300 case PROMDEV_TTYA:
301 strcat(of_console_path, ":a");
302 break;
303 case PROMDEV_TTYB:
304 strcat(of_console_path, ":b");
305 break;
306 }
307 } else {
308 const char *path;
309
310 dp = of_find_node_by_path("/");
311 path = of_get_property(dp, "stdout-path", NULL);
312 if (!path) {
313 prom_printf("No stdout-path in root node.\n");
314 prom_halt();
315 }
316 strcpy(of_console_path, path);
317 }
318 break;
319 }
320
321 of_console_options = strrchr(of_console_path, ':');
322 if (of_console_options) {
323 of_console_options++;
324 if (*of_console_options == '\0')
325 of_console_options = NULL;
326 }
327
328 printk(msg, of_console_path);
329}
330
331void __init of_fill_in_cpu_data(void)
332{
333}
334
335void __init irq_trans_init(struct device_node *dp)
336{
337}
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 sparc32 by David S. Miller davem@davemloft.net
12 */
13
14#include <linux/kernel.h>
15#include <linux/types.h>
16#include <linux/string.h>
17#include <linux/mm.h>
18#include <linux/memblock.h>
19
20#include <asm/prom.h>
21#include <asm/oplib.h>
22#include <asm/leon.h>
23#include <asm/leon_amba.h>
24
25#include "prom.h"
26
27void * __init prom_early_alloc(unsigned long size)
28{
29 void *ret;
30
31 ret = memblock_alloc(size, SMP_CACHE_BYTES);
32 if (!ret)
33 panic("%s: Failed to allocate %lu bytes\n", __func__, size);
34
35 prom_early_allocated += size;
36
37 return ret;
38}
39
40/* The following routines deal with the black magic of fully naming a
41 * node.
42 *
43 * Certain well known named nodes are just the simple name string.
44 *
45 * Actual devices have an address specifier appended to the base name
46 * string, like this "foo@addr". The "addr" can be in any number of
47 * formats, and the platform plus the type of the node determine the
48 * format and how it is constructed.
49 *
50 * For children of the ROOT node, the naming convention is fixed and
51 * determined by whether this is a sun4u or sun4v system.
52 *
53 * For children of other nodes, it is bus type specific. So
54 * we walk up the tree until we discover a "device_type" property
55 * we recognize and we go from there.
56 */
57static void __init sparc32_path_component(struct device_node *dp, char *tmp_buf)
58{
59 const char *name = of_get_property(dp, "name", NULL);
60 struct linux_prom_registers *regs;
61 struct property *rprop;
62
63 rprop = of_find_property(dp, "reg", NULL);
64 if (!rprop)
65 return;
66
67 regs = rprop->value;
68 sprintf(tmp_buf, "%s@%x,%x",
69 name,
70 regs->which_io, regs->phys_addr);
71}
72
73/* "name@slot,offset" */
74static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
75{
76 const char *name = of_get_property(dp, "name", NULL);
77 struct linux_prom_registers *regs;
78 struct property *prop;
79
80 prop = of_find_property(dp, "reg", NULL);
81 if (!prop)
82 return;
83
84 regs = prop->value;
85 sprintf(tmp_buf, "%s@%x,%x",
86 name,
87 regs->which_io,
88 regs->phys_addr);
89}
90
91/* "name@devnum[,func]" */
92static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
93{
94 const char *name = of_get_property(dp, "name", NULL);
95 struct linux_prom_pci_registers *regs;
96 struct property *prop;
97 unsigned int devfn;
98
99 prop = of_find_property(dp, "reg", NULL);
100 if (!prop)
101 return;
102
103 regs = prop->value;
104 devfn = (regs->phys_hi >> 8) & 0xff;
105 if (devfn & 0x07) {
106 sprintf(tmp_buf, "%s@%x,%x",
107 name,
108 devfn >> 3,
109 devfn & 0x07);
110 } else {
111 sprintf(tmp_buf, "%s@%x",
112 name,
113 devfn >> 3);
114 }
115}
116
117/* "name@addrhi,addrlo" */
118static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
119{
120 const char *name = of_get_property(dp, "name", NULL);
121 struct linux_prom_registers *regs;
122 struct property *prop;
123
124 prop = of_find_property(dp, "reg", NULL);
125 if (!prop)
126 return;
127
128 regs = prop->value;
129
130 sprintf(tmp_buf, "%s@%x,%x",
131 name,
132 regs->which_io, regs->phys_addr);
133}
134
135/* "name@irq,addrlo" */
136static void __init ambapp_path_component(struct device_node *dp, char *tmp_buf)
137{
138 const char *name = of_get_property(dp, "name", NULL);
139 struct amba_prom_registers *regs;
140 unsigned int *intr;
141 unsigned int reg0;
142 struct property *prop;
143 int interrupt = 0;
144
145 /* In order to get a unique ID in the device tree (multiple AMBA devices
146 * may have the same name) the node number is printed
147 */
148 prop = of_find_property(dp, "reg", NULL);
149 if (!prop) {
150 reg0 = (unsigned int)dp->phandle;
151 } else {
152 regs = prop->value;
153 reg0 = regs->phys_addr;
154 }
155
156 /* Not all cores have Interrupt */
157 prop = of_find_property(dp, "interrupts", NULL);
158 if (!prop)
159 intr = &interrupt; /* IRQ0 does not exist */
160 else
161 intr = prop->value;
162
163 sprintf(tmp_buf, "%s@%x,%x", name, *intr, reg0);
164}
165
166static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
167{
168 struct device_node *parent = dp->parent;
169
170 if (parent != NULL) {
171 if (of_node_is_type(parent, "pci") ||
172 of_node_is_type(parent, "pciex"))
173 return pci_path_component(dp, tmp_buf);
174 if (of_node_is_type(parent, "sbus"))
175 return sbus_path_component(dp, tmp_buf);
176 if (of_node_is_type(parent, "ebus"))
177 return ebus_path_component(dp, tmp_buf);
178 if (of_node_is_type(parent, "ambapp"))
179 return ambapp_path_component(dp, tmp_buf);
180
181 /* "isa" is handled with platform naming */
182 }
183
184 /* Use platform naming convention. */
185 return sparc32_path_component(dp, tmp_buf);
186}
187
188char * __init build_path_component(struct device_node *dp)
189{
190 const char *name = of_get_property(dp, "name", NULL);
191 char tmp_buf[64], *n;
192
193 tmp_buf[0] = '\0';
194 __build_path_component(dp, tmp_buf);
195 if (tmp_buf[0] == '\0')
196 strcpy(tmp_buf, name);
197
198 n = prom_early_alloc(strlen(tmp_buf) + 1);
199 strcpy(n, tmp_buf);
200
201 return n;
202}
203
204extern void restore_current(void);
205
206void __init of_console_init(void)
207{
208 char *msg = "OF stdout device is: %s\n";
209 struct device_node *dp;
210 unsigned long flags;
211 const char *type;
212 phandle node;
213 int skip, tmp, fd;
214
215 of_console_path = prom_early_alloc(256);
216
217 switch (prom_vers) {
218 case PROM_V0:
219 skip = 0;
220 switch (*romvec->pv_stdout) {
221 case PROMDEV_SCREEN:
222 type = "display";
223 break;
224
225 case PROMDEV_TTYB:
226 skip = 1;
227 fallthrough;
228
229 case PROMDEV_TTYA:
230 type = "serial";
231 break;
232
233 default:
234 prom_printf("Invalid PROM_V0 stdout value %u\n",
235 *romvec->pv_stdout);
236 prom_halt();
237 }
238
239 tmp = skip;
240 for_each_node_by_type(dp, type) {
241 if (!tmp--)
242 break;
243 }
244 if (!dp) {
245 prom_printf("Cannot find PROM_V0 console node.\n");
246 prom_halt();
247 }
248 of_console_device = dp;
249
250 sprintf(of_console_path, "%pOF", dp);
251 if (!strcmp(type, "serial")) {
252 strcat(of_console_path,
253 (skip ? ":b" : ":a"));
254 }
255 break;
256
257 default:
258 case PROM_V2:
259 case PROM_V3:
260 fd = *romvec->pv_v2bootargs.fd_stdout;
261
262 spin_lock_irqsave(&prom_lock, flags);
263 node = (*romvec->pv_v2devops.v2_inst2pkg)(fd);
264 restore_current();
265 spin_unlock_irqrestore(&prom_lock, flags);
266
267 if (!node) {
268 prom_printf("Cannot resolve stdout node from "
269 "instance %08x.\n", fd);
270 prom_halt();
271 }
272 dp = of_find_node_by_phandle(node);
273
274 if (!of_node_is_type(dp, "display") &&
275 !of_node_is_type(dp, "serial")) {
276 prom_printf("Console device_type is neither display "
277 "nor serial.\n");
278 prom_halt();
279 }
280
281 of_console_device = dp;
282
283 if (prom_vers == PROM_V2) {
284 sprintf(of_console_path, "%pOF", dp);
285 switch (*romvec->pv_stdout) {
286 case PROMDEV_TTYA:
287 strcat(of_console_path, ":a");
288 break;
289 case PROMDEV_TTYB:
290 strcat(of_console_path, ":b");
291 break;
292 }
293 } else {
294 const char *path;
295
296 dp = of_find_node_by_path("/");
297 path = of_get_property(dp, "stdout-path", NULL);
298 if (!path) {
299 prom_printf("No stdout-path in root node.\n");
300 prom_halt();
301 }
302 strcpy(of_console_path, path);
303 }
304 break;
305 }
306
307 of_console_options = strrchr(of_console_path, ':');
308 if (of_console_options) {
309 of_console_options++;
310 if (*of_console_options == '\0')
311 of_console_options = NULL;
312 }
313
314 printk(msg, of_console_path);
315}
316
317void __init of_fill_in_cpu_data(void)
318{
319}
320
321void __init irq_trans_init(struct device_node *dp)
322{
323}