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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_pos
*
* Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* Test the EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.
*
* The following services are tested:
* OutputString, TestString, SetAttribute.
*/
#include <efi_selftest.h>
#include <linux/libfdt.h>
static const struct efi_system_table *systemtab;
static const struct efi_boot_services *boottime;
static const char *fdt;
/* This should be sufficient for */
#define BUFFERSIZE 0x100000
static const efi_guid_t fdt_guid = EFI_FDT_GUID;
static const efi_guid_t acpi_guid = EFI_ACPI_TABLE_GUID;
/*
* Convert FDT value to host endianness.
*
* @val FDT value
* @return converted value
*/
static uint32_t f2h(fdt32_t val)
{
char *buf = (char *)&val;
char i;
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
/* Swap the bytes */
i = buf[0]; buf[0] = buf[3]; buf[3] = i;
i = buf[1]; buf[1] = buf[2]; buf[2] = i;
#endif
return *(uint32_t *)buf;
}
/**
* get_property() - return value of a property of an FDT node
*
* A property of the root node or one of its direct children can be
* retrieved.
*
* @property name of the property
* @node name of the node or NULL for root node
* @return value of the property
*/
static char *get_property(const u16 *property, const u16 *node)
{
struct fdt_header *header = (struct fdt_header *)fdt;
const fdt32_t *end;
const fdt32_t *pos;
const char *strings;
size_t level = 0;
const char *nodelabel = NULL;
if (!header) {
efi_st_error("Missing device tree\n");
return NULL;
}
if (f2h(header->magic) != FDT_MAGIC) {
efi_st_error("Wrong device tree magic\n");
return NULL;
}
pos = (fdt32_t *)(fdt + f2h(header->off_dt_struct));
end = &pos[f2h(header->totalsize) >> 2];
strings = fdt + f2h(header->off_dt_strings);
for (; pos < end;) {
switch (f2h(pos[0])) {
case FDT_BEGIN_NODE: {
const char *c = (char *)&pos[1];
size_t i;
if (level == 1)
nodelabel = c;
++level;
for (i = 0; c[i]; ++i)
;
pos = &pos[2 + (i >> 2)];
break;
}
case FDT_PROP: {
struct fdt_property *prop = (struct fdt_property *)pos;
const char *label = &strings[f2h(prop->nameoff)];
efi_status_t ret;
/* Check if this is the property to be returned */
if (!efi_st_strcmp_16_8(property, label) &&
((level == 1 && !node) ||
(level == 2 && node &&
!efi_st_strcmp_16_8(node, nodelabel)))) {
char *str;
efi_uintn_t len = f2h(prop->len);
if (!len)
return NULL;
/*
* The string might not be 0 terminated.
* It is safer to make a copy.
*/
ret = boottime->allocate_pool(
EFI_LOADER_DATA, len + 1,
(void **)&str);
if (ret != EFI_SUCCESS) {
efi_st_error("AllocatePool failed\n");
return NULL;
}
boottime->copy_mem(str, &pos[3], len);
str[len] = 0;
return str;
}
pos = &pos[3 + ((f2h(prop->len) + 3) >> 2)];
break;
}
case FDT_NOP:
++pos;
break;
case FDT_END_NODE:
--level;
++pos;
break;
case FDT_END:
return NULL;
default:
efi_st_error("Invalid device tree token\n");
return NULL;
}
}
efi_st_error("Missing FDT_END token\n");
return NULL;
}
/**
* efi_st_get_config_table() - get configuration table
*
* @guid: GUID of the configuration table
* Return: pointer to configuration table or NULL
*/
static void *efi_st_get_config_table(const efi_guid_t *guid)
{
size_t i;
for (i = 0; i < systab.nr_tables; i++) {
if (!guidcmp(guid, &systemtab->tables[i].guid))
return systemtab->tables[i].table;
}
return NULL;
}
/*
* Setup unit test.
*
* @handle: handle of the loaded image
* @systable: system table
* @return: EFI_ST_SUCCESS for success
*/
static int setup(const efi_handle_t img_handle,
const struct efi_system_table *systable)
{
void *acpi;
systemtab = systable;
boottime = systable->boottime;
acpi = efi_st_get_config_table(&acpi_guid);
fdt = efi_st_get_config_table(&fdt_guid);
if (!fdt) {
efi_st_error("Missing device tree\n");
return EFI_ST_FAILURE;
}
if (acpi) {
efi_st_error("Found ACPI table and device tree\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
/*
* Execute unit test.
*
* @return: EFI_ST_SUCCESS for success
*/
static int execute(void)
{
char *str;
efi_status_t ret;
str = get_property(L"compatible", NULL);
if (str) {
efi_st_printf("compatible: %s\n", str);
ret = boottime->free_pool(str);
if (ret != EFI_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
} else {
efi_st_error("Missing property 'compatible'\n");
return EFI_ST_FAILURE;
}
str = get_property(L"serial-number", NULL);
if (str) {
efi_st_printf("serial-number: %s\n", str);
ret = boottime->free_pool(str);
if (ret != EFI_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
}
str = get_property(L"boot-hartid", L"chosen");
if (IS_ENABLED(CONFIG_RISCV)) {
if (str) {
efi_st_printf("boot-hartid: %u\n",
f2h(*(fdt32_t *)str));
ret = boottime->free_pool(str);
if (ret != EFI_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
} else {
efi_st_error("boot-hartid not found\n");
return EFI_ST_FAILURE;
}
}
return EFI_ST_SUCCESS;
}
EFI_UNIT_TEST(fdt) = {
.name = "device tree",
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
};
|
