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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
* Header with function prototypes to help device tree manipulation using
* libfdt. It also provides functions to read entries from device tree proc
* interface.
*
* Copyright 2008 IBM Corporation.
* Authors: Jerone Young <jyoung5@us.ibm.com>
* Hollis Blanchard <hollisb@us.ibm.com>
*
* This work is licensed under the GNU GPL license version 2 or later.
*
*/
#ifndef DEVICE_TREE_H
#define DEVICE_TREE_H
void *create_device_tree(int *sizep);
void *load_device_tree(const char *filename_path, int *sizep);
#ifdef CONFIG_LINUX
/**
* load_device_tree_from_sysfs: reads the device tree information in the
* /proc/device-tree directory and return the corresponding binary blob
* buffer pointer. Asserts in case of error.
*/
void *load_device_tree_from_sysfs(void);
#endif
/**
* qemu_fdt_node_path: return the paths of nodes matching a given
* name and compat string
* @fdt: pointer to the dt blob
* @name: node name
* @compat: compatibility string
* @errp: handle to an error object
*
* returns a newly allocated NULL-terminated array of node paths.
* Use g_strfreev() to free it. If one or more nodes were found, the
* array contains the path of each node and the last element equals to
* NULL. If there is no error but no matching node was found, the
* returned array contains a single element equal to NULL. If an error
* was encountered when parsing the blob, the function returns NULL
*
* @name may be NULL to wildcard names and only match compatibility
* strings.
*/
char **qemu_fdt_node_path(void *fdt, const char *name, const char *compat,
Error **errp);
/**
* qemu_fdt_node_unit_path: return the paths of nodes matching a given
* node-name, ie. node-name and node-name@unit-address
* @fdt: pointer to the dt blob
* @name: node name
* @errp: handle to an error object
*
* returns a newly allocated NULL-terminated array of node paths.
* Use g_strfreev() to free it. If one or more nodes were found, the
* array contains the path of each node and the last element equals to
* NULL. If there is no error but no matching node was found, the
* returned array contains a single element equal to NULL. If an error
* was encountered when parsing the blob, the function returns NULL
*/
char **qemu_fdt_node_unit_path(void *fdt, const char *name, Error **errp);
int qemu_fdt_setprop(void *fdt, const char *node_path,
const char *property, const void *val, int size);
int qemu_fdt_setprop_cell(void *fdt, const char *node_path,
const char *property, uint32_t val);
int qemu_fdt_setprop_u64(void *fdt, const char *node_path,
const char *property, uint64_t val);
int qemu_fdt_setprop_string(void *fdt, const char *node_path,
const char *property, const char *string);
/**
* qemu_fdt_setprop_string_array: set a string array property
*
* @fdt: pointer to the dt blob
* @name: node name
* @prop: property array
* @array: pointer to an array of string pointers
* @len: length of array
*
* assigns a string array to a property. This function converts and
* array of strings to a sequential string with \0 separators before
* setting the property.
*/
int qemu_fdt_setprop_string_array(void *fdt, const char *node_path,
const char *prop, char **array, int len);
int qemu_fdt_setprop_phandle(void *fdt, const char *node_path,
const char *property,
const char *target_node_path);
/**
* qemu_fdt_getprop: retrieve the value of a given property
* @fdt: pointer to the device tree blob
* @node_path: node path
* @property: name of the property to find
* @lenp: fdt error if any or length of the property on success
* @errp: handle to an error object
*
* returns a pointer to the property on success and NULL on failure
*/
const void *qemu_fdt_getprop(void *fdt, const char *node_path,
const char *property, int *lenp,
Error **errp);
/**
* qemu_fdt_getprop_cell: retrieve the value of a given 4 byte property
* @fdt: pointer to the device tree blob
* @node_path: node path
* @property: name of the property to find
* @lenp: fdt error if any or -EINVAL if the property size is different from
* 4 bytes, or 4 (expected length of the property) upon success.
* @errp: handle to an error object
*
* returns the property value on success
*/
uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path,
const char *property, int *lenp,
Error **errp);
uint32_t qemu_fdt_get_phandle(void *fdt, const char *path);
uint32_t qemu_fdt_alloc_phandle(void *fdt);
int qemu_fdt_nop_node(void *fdt, const char *node_path);
int qemu_fdt_add_subnode(void *fdt, const char *name);
int qemu_fdt_add_path(void *fdt, const char *path);
#define qemu_fdt_setprop_cells(fdt, node_path, property, ...) \
do { \
uint32_t qdt_tmp[] = { __VA_ARGS__ }; \
for (unsigned i_ = 0; i_ < ARRAY_SIZE(qdt_tmp); i_++) { \
qdt_tmp[i_] = cpu_to_be32(qdt_tmp[i_]); \
} \
qemu_fdt_setprop(fdt, node_path, property, qdt_tmp, \
sizeof(qdt_tmp)); \
} while (0)
void qemu_fdt_dumpdtb(void *fdt, int size);
/**
* qemu_fdt_setprop_sized_cells_from_array:
* @fdt: device tree blob
* @node_path: node to set property on
* @property: property to set
* @numvalues: number of values
* @values: array of number-of-cells, value pairs
*
* Set the specified property on the specified node in the device tree
* to be an array of cells. The values of the cells are specified via
* the values list, which alternates between "number of cells used by
* this value" and "value".
* number-of-cells must be either 1 or 2 (other values will result in
* an error being returned). If a value is too large to fit in the
* number of cells specified for it, an error is returned.
*
* This function is useful because device tree nodes often have cell arrays
* which are either lists of addresses or lists of address,size tuples, but
* the number of cells used for each element vary depending on the
* #address-cells and #size-cells properties of their parent node.
* If you know all your cell elements are one cell wide you can use the
* simpler qemu_fdt_setprop_cells(). If you're not setting up the
* array programmatically, qemu_fdt_setprop_sized_cells may be more
* convenient.
*
* Return value: 0 on success, <0 on error.
*/
int qemu_fdt_setprop_sized_cells_from_array(void *fdt,
const char *node_path,
const char *property,
int numvalues,
uint64_t *values);
/**
* qemu_fdt_setprop_sized_cells:
* @fdt: device tree blob
* @node_path: node to set property on
* @property: property to set
* @...: list of number-of-cells, value pairs
*
* Set the specified property on the specified node in the device tree
* to be an array of cells. The values of the cells are specified via
* the variable arguments, which alternates between "number of cells
* used by this value" and "value".
*
* This is a convenience wrapper for the function
* qemu_fdt_setprop_sized_cells_from_array().
*
* Return value: 0 on success, <0 on error.
*/
#define qemu_fdt_setprop_sized_cells(fdt, node_path, property, ...) \
({ \
uint64_t qdt_tmp[] = { __VA_ARGS__ }; \
qemu_fdt_setprop_sized_cells_from_array(fdt, node_path, \
property, \
ARRAY_SIZE(qdt_tmp) / 2, \
qdt_tmp); \
})
/**
* qemu_fdt_randomize_seeds:
* @fdt: device tree blob
*
* Re-randomize all "rng-seed" properties with new seeds.
*/
void qemu_fdt_randomize_seeds(void *fdt);
#define FDT_PCI_RANGE_RELOCATABLE 0x80000000
#define FDT_PCI_RANGE_PREFETCHABLE 0x40000000
#define FDT_PCI_RANGE_ALIASED 0x20000000
#define FDT_PCI_RANGE_TYPE_MASK 0x03000000
#define FDT_PCI_RANGE_MMIO_64BIT 0x03000000
#define FDT_PCI_RANGE_MMIO 0x02000000
#define FDT_PCI_RANGE_IOPORT 0x01000000
#define FDT_PCI_RANGE_CONFIG 0x00000000
#endif /* DEVICE_TREE_H */
|
