1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/* prom_common.c: OF device tree support common code.
*
* Paul Mackerras August 1996.
* Copyright (C) 1996-2005 Paul Mackerras.
*
* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
* {engebret|bergner}@us.ibm.com
*
* Adapted for sparc by David S. Miller davem@davemloft.net
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_pdt.h>
#include <asm/prom.h>
#include <asm/oplib.h>
#include <asm/leon.h>
#include "prom.h"
struct device_node *of_console_device;
EXPORT_SYMBOL(of_console_device);
char *of_console_path;
EXPORT_SYMBOL(of_console_path);
char *of_console_options;
EXPORT_SYMBOL(of_console_options);
int of_getintprop_default(struct device_node *np, const char *name, int def)
{
struct property *prop;
int len;
prop = of_find_property(np, name, &len);
if (!prop || len != 4)
return def;
return *(int *) prop->value;
}
EXPORT_SYMBOL(of_getintprop_default);
DEFINE_MUTEX(of_set_property_mutex);
EXPORT_SYMBOL(of_set_property_mutex);
int of_set_property(struct device_node *dp, const char *name, void *val, int len)
{
struct property **prevp;
void *new_val;
int err;
new_val = kmalloc(len, GFP_KERNEL);
if (!new_val)
return -ENOMEM;
memcpy(new_val, val, len);
err = -ENODEV;
mutex_lock(&of_set_property_mutex);
write_lock(&devtree_lock);
prevp = &dp->properties;
while (*prevp) {
struct property *prop = *prevp;
if (!strcasecmp(prop->name, name)) {
void *old_val = prop->value;
int ret;
ret = prom_setprop(dp->phandle, name, val, len);
err = -EINVAL;
if (ret >= 0) {
prop->value = new_val;
prop->length = len;
if (OF_IS_DYNAMIC(prop))
kfree(old_val);
OF_MARK_DYNAMIC(prop);
err = 0;
}
break;
}
prevp = &(*prevp)->next;
}
write_unlock(&devtree_lock);
mutex_unlock(&of_set_property_mutex);
/* XXX Upate procfs if necessary... */
return err;
}
EXPORT_SYMBOL(of_set_property);
int of_find_in_proplist(const char *list, const char *match, int len)
{
while (len > 0) {
int l;
if (!strcmp(list, match))
return 1;
l = strlen(list) + 1;
list += l;
len -= l;
}
return 0;
}
EXPORT_SYMBOL(of_find_in_proplist);
/*
* SPARC32 and SPARC64's prom_nextprop() do things differently
* here, despite sharing the same interface. SPARC32 doesn't fill in 'buf',
* returning NULL on an error. SPARC64 fills in 'buf', but sets it to an
* empty string upon error.
*/
static int __init handle_nextprop_quirks(char *buf, const char *name)
{
if (!name || strlen(name) == 0)
return -1;
#ifdef CONFIG_SPARC32
strcpy(buf, name);
#endif
return 0;
}
static int __init prom_common_nextprop(phandle node, char *prev, char *buf)
{
const char *name;
buf[0] = '\0';
name = prom_nextprop(node, prev, buf);
return handle_nextprop_quirks(buf, name);
}
unsigned int prom_early_allocated __initdata;
static struct of_pdt_ops prom_sparc_ops __initdata = {
.nextprop = prom_common_nextprop,
.getproplen = prom_getproplen,
.getproperty = prom_getproperty,
.getchild = prom_getchild,
.getsibling = prom_getsibling,
};
void __init prom_build_devicetree(void)
{
of_pdt_build_devicetree(prom_root_node, &prom_sparc_ops);
of_console_init();
pr_info("PROM: Built device tree with %u bytes of memory.\n",
prom_early_allocated);
}
|
