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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Linaro
* Bryan O'Donoghue <bryan.odonoghue@linaro.org>
*/
#include <fdtdec.h>
#include <image.h>
#include <log.h>
#include <malloc.h>
#include <dm/ofnode.h>
#include <linux/ioport.h>
#include <linux/libfdt.h>
#include <tee/optee.h>
#define optee_hdr_err_msg \
"OPTEE verification error:" \
"\n\thdr=%p image=0x%08lx magic=0x%08x" \
"\n\theader lo=0x%08x hi=0x%08x size=0x%08lx arch=0x%08x" \
"\n\tuimage params 0x%08lx-0x%08lx\n"
#if defined(CONFIG_OPTEE_IMAGE)
static int optee_verify_image(struct optee_header *hdr, unsigned long image_len)
{
uint32_t tee_file_size;
tee_file_size = hdr->init_size + hdr->paged_size +
sizeof(struct optee_header);
if (hdr->magic != OPTEE_MAGIC ||
hdr->version != OPTEE_VERSION ||
tee_file_size != image_len) {
return -EINVAL;
}
return 0;
}
int optee_verify_bootm_image(unsigned long image_addr,
unsigned long image_load_addr,
unsigned long image_len)
{
struct optee_header *hdr = (struct optee_header *)image_addr;
int ret;
ret = optee_verify_image(hdr, image_len);
if (ret)
goto error;
if (image_load_addr + sizeof(*hdr) != hdr->init_load_addr_lo) {
ret = -EINVAL;
goto error;
}
return ret;
error:
printf(optee_hdr_err_msg, hdr, image_addr, hdr->magic,
hdr->init_load_addr_lo,
hdr->init_load_addr_hi, image_len, hdr->arch, image_load_addr,
image_load_addr + image_len);
return ret;
}
#endif
#if defined(CONFIG_OF_LIBFDT)
static int optee_copy_firmware_node(ofnode node, void *fdt_blob)
{
int offs, ret, len;
const void *prop;
offs = fdt_path_offset(fdt_blob, "/firmware");
if (offs < 0) {
offs = fdt_path_offset(fdt_blob, "/");
if (offs < 0)
return offs;
offs = fdt_add_subnode(fdt_blob, offs, "firmware");
if (offs < 0)
return offs;
}
offs = fdt_add_subnode(fdt_blob, offs, "optee");
if (offs < 0)
return offs;
/* copy the compatible property */
prop = ofnode_get_property(node, "compatible", &len);
if (!prop) {
debug("missing OP-TEE compatible property");
return -EINVAL;
}
ret = fdt_setprop(fdt_blob, offs, "compatible", prop, len);
if (ret < 0)
return ret;
/* copy the method property */
prop = ofnode_get_property(node, "method", &len);
if (!prop) {
debug("missing OP-TEE method property");
return -EINVAL;
}
ret = fdt_setprop(fdt_blob, offs, "method", prop, len);
if (ret < 0)
return ret;
return 0;
}
int optee_copy_fdt_nodes(void *new_blob)
{
ofnode node, subnode;
int ret;
struct resource res;
if (fdt_check_header(new_blob))
return -EINVAL;
/* only proceed if there is an /firmware/optee node */
node = ofnode_path("/firmware/optee");
if (!ofnode_valid(node)) {
debug("No OP-TEE firmware node in old fdt, nothing to do");
return 0;
}
/*
* Do not proceed if the target dt already has an OP-TEE node.
* In this case assume that the system knows better somehow,
* so do not interfere.
*/
if (fdt_path_offset(new_blob, "/firmware/optee") >= 0) {
debug("OP-TEE Device Tree node already exists in target");
return 0;
}
ret = optee_copy_firmware_node(node, new_blob);
if (ret < 0) {
printf("Failed to add OP-TEE firmware node\n");
return ret;
}
/* optee inserts its memory regions as reserved-memory nodes */
node = ofnode_path("/reserved-memory");
if (ofnode_valid(node)) {
ofnode_for_each_subnode(subnode, node) {
const char *name = ofnode_get_name(subnode);
if (!name)
return -EINVAL;
/* only handle optee reservations */
if (strncmp(name, "optee", 5))
continue;
/* check if this subnode has a reg property */
ret = ofnode_read_resource(subnode, 0, &res);
if (!ret) {
struct fdt_memory carveout = {
.start = res.start,
.end = res.end,
};
unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
char *oldname, *nodename, *tmp;
oldname = strdup(name);
if (!oldname)
return -ENOMEM;
tmp = oldname;
nodename = strsep(&tmp, "@");
if (!nodename) {
free(oldname);
return -EINVAL;
}
ret = fdtdec_add_reserved_memory(new_blob,
nodename,
&carveout,
NULL, 0,
NULL, flags);
free(oldname);
if (ret < 0)
return ret;
}
}
}
return 0;
}
#endif
|
