Commit | Line | Data |
---|---|---|
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> | |
942a6bdd DM |
23 | |
24 | #include <asm/prom.h> | |
25 | #include <asm/oplib.h> | |
e63829de KE |
26 | #include <asm/leon.h> |
27 | #include <asm/leon_amba.h> | |
942a6bdd | 28 | |
657f201d | 29 | #include "prom.h" |
fb7cd9d9 | 30 | |
efeac2f8 | 31 | void * __init prom_early_alloc(unsigned long size) |
942a6bdd DM |
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 | ||
942a6bdd DM |
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 | */ | |
61 | static 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" */ | |
77 | static 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]" */ | |
94 | static 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" */ | |
119 | static 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 | ||
e63829de KE |
135 | /* "name:vendor:device@irq,addrlo" */ |
136 | static void __init ambapp_path_component(struct device_node *dp, char *tmp_buf) | |
137 | { | |
9663eb21 DH |
138 | struct amba_prom_registers *regs; |
139 | unsigned int *intr, *device, *vendor, reg0; | |
e63829de | 140 | struct property *prop; |
9663eb21 | 141 | int interrupt = 0; |
e63829de | 142 | |
9663eb21 DH |
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 | */ | |
e63829de | 146 | prop = of_find_property(dp, "reg", NULL); |
9663eb21 DH |
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 */ | |
e63829de KE |
155 | prop = of_find_property(dp, "interrupts", NULL); |
156 | if (!prop) | |
9663eb21 DH |
157 | intr = &interrupt; /* IRQ0 does not exist */ |
158 | else | |
159 | intr = prop->value; | |
160 | ||
e63829de KE |
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, | |
9663eb21 | 172 | *intr, reg0); |
e63829de KE |
173 | } |
174 | ||
942a6bdd DM |
175 | static 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); | |
e63829de KE |
187 | if (!strcmp(parent->type, "ambapp")) |
188 | return ambapp_path_component(dp, tmp_buf); | |
942a6bdd DM |
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 | ||
6524036a | 197 | char * __init build_path_component(struct device_node *dp) |
942a6bdd DM |
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 | ||
c73fcc84 DM |
212 | extern void restore_current(void); |
213 | ||
23dc758e | 214 | void __init of_console_init(void) |
c73fcc84 DM |
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; | |
f623f388 | 221 | int skip, tmp, fd; |
c73fcc84 DM |
222 | |
223 | of_console_path = prom_early_alloc(256); | |
224 | ||
225 | switch (prom_vers) { | |
226 | case PROM_V0: | |
c73fcc84 DM |
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 | ||
f623f388 | 247 | tmp = skip; |
c73fcc84 | 248 | for_each_node_by_type(dp, type) { |
f623f388 | 249 | if (!tmp--) |
c73fcc84 DM |
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 | ||
c73fcc84 DM |
328 | printk(msg, of_console_path); |
329 | } | |
330 | ||
23dc758e | 331 | void __init of_fill_in_cpu_data(void) |
942a6bdd | 332 | { |
942a6bdd | 333 | } |
bf944c37 DM |
334 | |
335 | void __init irq_trans_init(struct device_node *dp) | |
336 | { | |
337 | } |