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
|
/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <skiboot.h>
#include <stdarg.h>
#include <libfdt.h>
#include <device.h>
#include <cpu.h>
#include <opal.h>
#include <interrupts.h>
#include <fsp.h>
#include <cec.h>
#include <vpd.h>
#include <ccan/str/str.h>
static int fdt_error;
#undef DEBUG_FDT
#ifdef DEBUG_FDT
#define FDT_DBG(fmt, a...) prlog(PR_DEBUG, "FDT: " fmt, ##a)
#else
#define FDT_DBG(fmt, a...)
#endif
static void __save_err(int err, const char *str)
{
FDT_DBG("rc: %d from \"%s\"\n", err, str);
if (err && !fdt_error) {
prerror("FDT: Error %d from \"%s\"\n", err, str);
fdt_error = err;
}
}
#define save_err(...) __save_err(__VA_ARGS__, #__VA_ARGS__)
static void dt_property_cell(void *fdt, const char *name, u32 cell)
{
save_err(fdt_property_cell(fdt, name, cell));
}
static void dt_begin_node(void *fdt, const struct dt_node *dn)
{
save_err(fdt_begin_node(fdt, dn->name));
/*
* We add both the new style "phandle" and the legacy
* "linux,phandle" properties
*/
dt_property_cell(fdt, "linux,phandle", dn->phandle);
dt_property_cell(fdt, "phandle", dn->phandle);
}
static void dt_property(void *fdt, const struct dt_property *p)
{
save_err(fdt_property(fdt, p->name, p->prop, p->len));
}
static void dt_end_node(void *fdt)
{
save_err(fdt_end_node(fdt));
}
#ifdef DEBUG_FDT
static void dump_fdt(void *fdt)
{
int i, off, depth, err;
prlog(PR_INFO, "Device tree %u@%p\n", fdt_totalsize(fdt), fdt);
err = fdt_check_header(fdt);
if (err) {
prerror("fdt_check_header: %s\n", fdt_strerror(err));
return;
}
prlog(PR_INFO, "fdt_check_header passed\n");
prlog(PR_INFO, "fdt_num_mem_rsv = %u\n", fdt_num_mem_rsv(fdt));
for (i = 0; i < fdt_num_mem_rsv(fdt); i++) {
u64 addr, size;
err = fdt_get_mem_rsv(fdt, i, &addr, &size);
if (err) {
prlog(PR_INFO, " ERR %s\n", fdt_strerror(err));
return;
}
prlog(PR_INFO, " mem_rsv[%i] = %lu@%#lx\n",
i, (long)addr, (long)size);
}
for (off = fdt_next_node(fdt, 0, &depth);
off > 0;
off = fdt_next_node(fdt, off, &depth)) {
int len;
const char *name;
name = fdt_get_name(fdt, off, &len);
if (!name) {
prerror("fdt: offset %i no name!\n", off);
return;
}
prlog(PR_INFO, "name: %s [%u]\n", name, off);
}
}
#else
static inline void dump_fdt(void *fdt __unused) { }
#endif
static void flatten_dt_properties(void *fdt, const struct dt_node *dn)
{
const struct dt_property *p;
list_for_each(&dn->properties, p, list) {
if (strstarts(p->name, DT_PRIVATE))
continue;
FDT_DBG(" prop: %s size: %ld\n", p->name, p->len);
dt_property(fdt, p);
}
}
static void flatten_dt_node(void *fdt, const struct dt_node *root)
{
const struct dt_node *i;
FDT_DBG("node: %s\n", root->name);
dt_begin_node(fdt, root);
flatten_dt_properties(fdt, root);
list_for_each(&root->children, i, list)
flatten_dt_node(fdt, i);
dt_end_node(fdt);
}
static void create_dtb_reservemap(void *fdt, const struct dt_node *root)
{
uint64_t base, size;
const uint64_t *ranges;
const struct dt_property *prop;
int i;
/* Duplicate the reserved-ranges property into the fdt reservemap */
prop = dt_find_property(root, "reserved-ranges");
if (prop) {
ranges = (const void *)prop->prop;
for (i = 0; i < prop->len / (sizeof(uint64_t) * 2); i++) {
base = *(ranges++);
size = *(ranges++);
save_err(fdt_add_reservemap_entry(fdt, base, size));
}
}
save_err(fdt_finish_reservemap(fdt));
}
static int __create_dtb(void *fdt, size_t len,
const struct dt_node *root)
{
fdt_create(fdt, len);
create_dtb_reservemap(fdt, root);
flatten_dt_node(fdt, root);
save_err(fdt_finish(fdt));
if (fdt_error) {
prerror("dtb: error %s\n", fdt_strerror(fdt_error));
return fdt_error;
}
dump_fdt(fdt);
return 0;
}
void *create_dtb(const struct dt_node *root)
{
void *fdt = NULL;
size_t len = DEVICE_TREE_MAX_SIZE;
uint32_t old_last_phandle = last_phandle;
int ret;
do {
last_phandle = old_last_phandle;
fdt_error = 0;
fdt = malloc(len);
if (!fdt) {
prerror("dtb: could not malloc %lu\n", (long)len);
return NULL;
}
ret = __create_dtb(fdt, len, root);
if (ret) {
free(fdt);
fdt = NULL;
}
len *= 2;
} while (ret == -FDT_ERR_NOSPACE);
return fdt;
}
|
