Commit | Line | Data |
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942a6bdd 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 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 | #include <linux/module.h> | |
24 | ||
25 | #include <asm/prom.h> | |
26 | #include <asm/oplib.h> | |
e63829de KE |
27 | #include <asm/leon.h> |
28 | #include <asm/leon_amba.h> | |
942a6bdd | 29 | |
657f201d | 30 | #include "prom.h" |
fb7cd9d9 | 31 | |
efeac2f8 | 32 | void * __init prom_early_alloc(unsigned long size) |
942a6bdd DM |
33 | { |
34 | void *ret; | |
35 | ||
36 | ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL); | |
37 | if (ret != NULL) | |
38 | memset(ret, 0, size); | |
39 | ||
40 | prom_early_allocated += size; | |
41 | ||
42 | return ret; | |
43 | } | |
44 | ||
942a6bdd DM |
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 | static void __init sparc32_path_component(struct device_node *dp, char *tmp_buf) | |
63 | { | |
64 | struct linux_prom_registers *regs; | |
65 | struct property *rprop; | |
66 | ||
67 | rprop = of_find_property(dp, "reg", NULL); | |
68 | if (!rprop) | |
69 | return; | |
70 | ||
71 | regs = rprop->value; | |
72 | sprintf(tmp_buf, "%s@%x,%x", | |
73 | dp->name, | |
74 | regs->which_io, regs->phys_addr); | |
75 | } | |
76 | ||
77 | /* "name@slot,offset" */ | |
78 | static void __init sbus_path_component(struct device_node *dp, char *tmp_buf) | |
79 | { | |
80 | struct linux_prom_registers *regs; | |
81 | struct property *prop; | |
82 | ||
83 | prop = of_find_property(dp, "reg", NULL); | |
84 | if (!prop) | |
85 | return; | |
86 | ||
87 | regs = prop->value; | |
88 | sprintf(tmp_buf, "%s@%x,%x", | |
89 | dp->name, | |
90 | regs->which_io, | |
91 | regs->phys_addr); | |
92 | } | |
93 | ||
94 | /* "name@devnum[,func]" */ | |
95 | static void __init pci_path_component(struct device_node *dp, char *tmp_buf) | |
96 | { | |
97 | struct linux_prom_pci_registers *regs; | |
98 | struct property *prop; | |
99 | unsigned int devfn; | |
100 | ||
101 | prop = of_find_property(dp, "reg", NULL); | |
102 | if (!prop) | |
103 | return; | |
104 | ||
105 | regs = prop->value; | |
106 | devfn = (regs->phys_hi >> 8) & 0xff; | |
107 | if (devfn & 0x07) { | |
108 | sprintf(tmp_buf, "%s@%x,%x", | |
109 | dp->name, | |
110 | devfn >> 3, | |
111 | devfn & 0x07); | |
112 | } else { | |
113 | sprintf(tmp_buf, "%s@%x", | |
114 | dp->name, | |
115 | devfn >> 3); | |
116 | } | |
117 | } | |
118 | ||
119 | /* "name@addrhi,addrlo" */ | |
120 | static void __init ebus_path_component(struct device_node *dp, char *tmp_buf) | |
121 | { | |
122 | struct linux_prom_registers *regs; | |
123 | struct property *prop; | |
124 | ||
125 | prop = of_find_property(dp, "reg", NULL); | |
126 | if (!prop) | |
127 | return; | |
128 | ||
129 | regs = prop->value; | |
130 | ||
131 | sprintf(tmp_buf, "%s@%x,%x", | |
132 | dp->name, | |
133 | regs->which_io, regs->phys_addr); | |
134 | } | |
135 | ||
e63829de KE |
136 | /* "name:vendor:device@irq,addrlo" */ |
137 | static void __init ambapp_path_component(struct device_node *dp, char *tmp_buf) | |
138 | { | |
139 | struct amba_prom_registers *regs; unsigned int *intr; | |
140 | unsigned int *device, *vendor; | |
141 | struct property *prop; | |
142 | ||
143 | prop = of_find_property(dp, "reg", NULL); | |
144 | if (!prop) | |
145 | return; | |
146 | regs = prop->value; | |
147 | prop = of_find_property(dp, "interrupts", NULL); | |
148 | if (!prop) | |
149 | return; | |
150 | intr = prop->value; | |
151 | prop = of_find_property(dp, "vendor", NULL); | |
152 | if (!prop) | |
153 | return; | |
154 | vendor = prop->value; | |
155 | prop = of_find_property(dp, "device", NULL); | |
156 | if (!prop) | |
157 | return; | |
158 | device = prop->value; | |
159 | ||
160 | sprintf(tmp_buf, "%s:%d:%d@%x,%x", | |
161 | dp->name, *vendor, *device, | |
162 | *intr, regs->phys_addr); | |
163 | } | |
164 | ||
942a6bdd DM |
165 | static void __init __build_path_component(struct device_node *dp, char *tmp_buf) |
166 | { | |
167 | struct device_node *parent = dp->parent; | |
168 | ||
169 | if (parent != NULL) { | |
170 | if (!strcmp(parent->type, "pci") || | |
171 | !strcmp(parent->type, "pciex")) | |
172 | return pci_path_component(dp, tmp_buf); | |
173 | if (!strcmp(parent->type, "sbus")) | |
174 | return sbus_path_component(dp, tmp_buf); | |
175 | if (!strcmp(parent->type, "ebus")) | |
176 | return ebus_path_component(dp, tmp_buf); | |
e63829de KE |
177 | if (!strcmp(parent->type, "ambapp")) |
178 | return ambapp_path_component(dp, tmp_buf); | |
942a6bdd DM |
179 | |
180 | /* "isa" is handled with platform naming */ | |
181 | } | |
182 | ||
183 | /* Use platform naming convention. */ | |
184 | return sparc32_path_component(dp, tmp_buf); | |
185 | } | |
186 | ||
6524036a | 187 | char * __init build_path_component(struct device_node *dp) |
942a6bdd DM |
188 | { |
189 | char tmp_buf[64], *n; | |
190 | ||
191 | tmp_buf[0] = '\0'; | |
192 | __build_path_component(dp, tmp_buf); | |
193 | if (tmp_buf[0] == '\0') | |
194 | strcpy(tmp_buf, dp->name); | |
195 | ||
196 | n = prom_early_alloc(strlen(tmp_buf) + 1); | |
197 | strcpy(n, tmp_buf); | |
198 | ||
199 | return n; | |
200 | } | |
201 | ||
c73fcc84 DM |
202 | extern void restore_current(void); |
203 | ||
23dc758e | 204 | void __init of_console_init(void) |
c73fcc84 DM |
205 | { |
206 | char *msg = "OF stdout device is: %s\n"; | |
207 | struct device_node *dp; | |
208 | unsigned long flags; | |
209 | const char *type; | |
210 | phandle node; | |
f623f388 | 211 | int skip, tmp, fd; |
c73fcc84 DM |
212 | |
213 | of_console_path = prom_early_alloc(256); | |
214 | ||
215 | switch (prom_vers) { | |
216 | case PROM_V0: | |
c73fcc84 DM |
217 | skip = 0; |
218 | switch (*romvec->pv_stdout) { | |
219 | case PROMDEV_SCREEN: | |
220 | type = "display"; | |
221 | break; | |
222 | ||
223 | case PROMDEV_TTYB: | |
224 | skip = 1; | |
225 | /* FALLTHRU */ | |
226 | ||
227 | case PROMDEV_TTYA: | |
228 | type = "serial"; | |
229 | break; | |
230 | ||
231 | default: | |
232 | prom_printf("Invalid PROM_V0 stdout value %u\n", | |
233 | *romvec->pv_stdout); | |
234 | prom_halt(); | |
235 | } | |
236 | ||
f623f388 | 237 | tmp = skip; |
c73fcc84 | 238 | for_each_node_by_type(dp, type) { |
f623f388 | 239 | if (!tmp--) |
c73fcc84 DM |
240 | break; |
241 | } | |
242 | if (!dp) { | |
243 | prom_printf("Cannot find PROM_V0 console node.\n"); | |
244 | prom_halt(); | |
245 | } | |
246 | of_console_device = dp; | |
247 | ||
248 | strcpy(of_console_path, dp->full_name); | |
249 | if (!strcmp(type, "serial")) { | |
250 | strcat(of_console_path, | |
251 | (skip ? ":b" : ":a")); | |
252 | } | |
253 | break; | |
254 | ||
255 | default: | |
256 | case PROM_V2: | |
257 | case PROM_V3: | |
258 | fd = *romvec->pv_v2bootargs.fd_stdout; | |
259 | ||
260 | spin_lock_irqsave(&prom_lock, flags); | |
261 | node = (*romvec->pv_v2devops.v2_inst2pkg)(fd); | |
262 | restore_current(); | |
263 | spin_unlock_irqrestore(&prom_lock, flags); | |
264 | ||
265 | if (!node) { | |
266 | prom_printf("Cannot resolve stdout node from " | |
267 | "instance %08x.\n", fd); | |
268 | prom_halt(); | |
269 | } | |
270 | dp = of_find_node_by_phandle(node); | |
271 | type = of_get_property(dp, "device_type", NULL); | |
272 | ||
273 | if (!type) { | |
274 | prom_printf("Console stdout lacks " | |
275 | "device_type property.\n"); | |
276 | prom_halt(); | |
277 | } | |
278 | ||
279 | if (strcmp(type, "display") && strcmp(type, "serial")) { | |
280 | prom_printf("Console device_type is neither display " | |
281 | "nor serial.\n"); | |
282 | prom_halt(); | |
283 | } | |
284 | ||
285 | of_console_device = dp; | |
286 | ||
287 | if (prom_vers == PROM_V2) { | |
288 | strcpy(of_console_path, dp->full_name); | |
289 | switch (*romvec->pv_stdout) { | |
290 | case PROMDEV_TTYA: | |
291 | strcat(of_console_path, ":a"); | |
292 | break; | |
293 | case PROMDEV_TTYB: | |
294 | strcat(of_console_path, ":b"); | |
295 | break; | |
296 | } | |
297 | } else { | |
298 | const char *path; | |
299 | ||
300 | dp = of_find_node_by_path("/"); | |
301 | path = of_get_property(dp, "stdout-path", NULL); | |
302 | if (!path) { | |
303 | prom_printf("No stdout-path in root node.\n"); | |
304 | prom_halt(); | |
305 | } | |
306 | strcpy(of_console_path, path); | |
307 | } | |
308 | break; | |
309 | } | |
310 | ||
311 | of_console_options = strrchr(of_console_path, ':'); | |
312 | if (of_console_options) { | |
313 | of_console_options++; | |
314 | if (*of_console_options == '\0') | |
315 | of_console_options = NULL; | |
316 | } | |
317 | ||
318 | prom_printf(msg, of_console_path); | |
319 | printk(msg, of_console_path); | |
320 | } | |
321 | ||
23dc758e | 322 | void __init of_fill_in_cpu_data(void) |
942a6bdd | 323 | { |
942a6bdd | 324 | } |
bf944c37 DM |
325 | |
326 | void __init irq_trans_init(struct device_node *dp) | |
327 | { | |
328 | } |