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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
|
/*++
Copyright (c) 2004 - 2007, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
EfiDriverLib.c
Abstract:
Light weight lib to support EFI drivers.
--*/
#include "Tiano.h"
#include "EfiDriverLib.h"
//
// Global Interface for Debug Mask Protocol
//
EFI_DEBUG_MASK_PROTOCOL *gDebugMaskInterface = NULL;
EFI_STATUS
EfiInitializeDriverLib (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
/*++
Routine Description:
Intialize Driver Lib if it has not yet been initialized.
Arguments:
ImageHandle - Standard EFI Image entry parameter
SystemTable - Standard EFI Image entry parameter
Returns:
EFI_STATUS always returns EFI_SUCCESS
--*/
{
gST = SystemTable;
ASSERT (gST != NULL);
gBS = gST->BootServices;
gRT = gST->RuntimeServices;
ASSERT (gBS != NULL);
ASSERT (gRT != NULL);
//
// Get driver debug mask protocol interface
//
#ifdef EFI_DEBUG
gBS->HandleProtocol (
ImageHandle,
&gEfiDebugMaskProtocolGuid,
(VOID *) &gDebugMaskInterface
);
#endif
//
// Should be at EFI_D_INFO, but lets us know things are running
//
DEBUG ((EFI_D_INFO, "EfiInitializeDriverLib: Started\n"));
return EFI_SUCCESS;
}
BOOLEAN
EfiLibCompareLanguage (
IN CHAR8 *Language1,
IN CHAR8 *Language2
)
/*++
Routine Description:
Compare whether two names of languages are identical.
Arguments:
Language1 - Name of language 1
Language2 - Name of language 2
Returns:
TRUE - same
FALSE - not same
--*/
{
UINTN Index;
#if (EFI_SPECIFICATION_VERSION >= 0x00020000)
for (Index = 0; (Language1[Index] != 0) && (Language2[Index] != 0); Index++) {
if (Language1[Index] != Language2[Index]) {
return FALSE;
}
}
if (((Language1[Index] == 0) && (Language2[Index] == 0)) ||
((Language1[Index] == 0) && (Language2[Index] != ';')) ||
((Language1[Index] == ';') && (Language2[Index] != 0)) ||
((Language1[Index] == ';') && (Language2[Index] != ';'))) {
return TRUE;
}
return FALSE;
#else
for (Index = 0; Index < 3; Index++) {
if (Language1[Index] != Language2[Index]) {
return FALSE;
}
}
return TRUE;
#endif
}
STATIC
CHAR8 *
NextSupportedLanguage (
IN CHAR8 *Languages
)
{
#ifdef LANGUAGE_RFC_3066 // LANGUAGE_RFC_3066
for (; (*Languages != 0) && (*Languages != ';'); Languages++)
;
if (*Languages == ';') {
Languages++;
}
return Languages;
#else // LANGUAGE_ISO_639_2
return (Languages + 3);
#endif
}
EFI_STATUS
EfiLibLookupUnicodeString (
IN CHAR8 *Language,
IN CHAR8 *SupportedLanguages,
IN EFI_UNICODE_STRING_TABLE *UnicodeStringTable,
OUT CHAR16 **UnicodeString
)
/*++
Routine Description:
Translate a unicode string to a specified language if supported.
Arguments:
Language - The name of language to translate to
SupportedLanguages - Supported languages set
UnicodeStringTable - Pointer of one item in translation dictionary
UnicodeString - The translated string
Returns:
EFI_INVALID_PARAMETER - Invalid parameter
EFI_UNSUPPORTED - System not supported this language or this string translation
EFI_SUCCESS - String successfully translated
--*/
{
//
// Make sure the parameters are valid
//
if (Language == NULL || UnicodeString == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// If there are no supported languages, or the Unicode String Table is empty, then the
// Unicode String specified by Language is not supported by this Unicode String Table
//
if (SupportedLanguages == NULL || UnicodeStringTable == NULL) {
return EFI_UNSUPPORTED;
}
//
// Make sure Language is in the set of Supported Languages
//
while (*SupportedLanguages != 0) {
if (EfiLibCompareLanguage (Language, SupportedLanguages)) {
//
// Search the Unicode String Table for the matching Language specifier
//
while (UnicodeStringTable->Language != NULL) {
if (EfiLibCompareLanguage (Language, UnicodeStringTable->Language)) {
//
// A matching string was found, so return it
//
*UnicodeString = UnicodeStringTable->UnicodeString;
return EFI_SUCCESS;
}
UnicodeStringTable++;
}
return EFI_UNSUPPORTED;
}
SupportedLanguages = NextSupportedLanguage(SupportedLanguages);
}
return EFI_UNSUPPORTED;
}
EFI_STATUS
EfiLibAddUnicodeString (
IN CHAR8 *Language,
IN CHAR8 *SupportedLanguages,
IN OUT EFI_UNICODE_STRING_TABLE **UnicodeStringTable,
IN CHAR16 *UnicodeString
)
/*++
Routine Description:
Add an translation to the dictionary if this language if supported.
Arguments:
Language - The name of language to translate to
SupportedLanguages - Supported languages set
UnicodeStringTable - Translation dictionary
UnicodeString - The corresponding string for the language to be translated to
Returns:
EFI_INVALID_PARAMETER - Invalid parameter
EFI_UNSUPPORTED - System not supported this language
EFI_ALREADY_STARTED - Already has a translation item of this language
EFI_OUT_OF_RESOURCES - No enough buffer to be allocated
EFI_SUCCESS - String successfully translated
--*/
{
UINTN NumberOfEntries;
EFI_UNICODE_STRING_TABLE *OldUnicodeStringTable;
EFI_UNICODE_STRING_TABLE *NewUnicodeStringTable;
UINTN UnicodeStringLength;
//
// Make sure the parameter are valid
//
if (Language == NULL || UnicodeString == NULL || UnicodeStringTable == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// If there are no supported languages, then a Unicode String can not be added
//
if (SupportedLanguages == NULL) {
return EFI_UNSUPPORTED;
}
//
// If the Unicode String is empty, then a Unicode String can not be added
//
if (UnicodeString[0] == 0) {
return EFI_INVALID_PARAMETER;
}
//
// Make sure Language is a member of SupportedLanguages
//
while (*SupportedLanguages != 0) {
if (EfiLibCompareLanguage (Language, SupportedLanguages)) {
//
// Determine the size of the Unicode String Table by looking for a NULL Language entry
//
NumberOfEntries = 0;
if (*UnicodeStringTable != NULL) {
OldUnicodeStringTable = *UnicodeStringTable;
while (OldUnicodeStringTable->Language != NULL) {
if (EfiLibCompareLanguage (Language, OldUnicodeStringTable->Language)) {
return EFI_ALREADY_STARTED;
}
OldUnicodeStringTable++;
NumberOfEntries++;
}
}
//
// Allocate space for a new Unicode String Table. It must hold the current number of
// entries, plus 1 entry for the new Unicode String, plus 1 entry for the end of table
// marker
//
NewUnicodeStringTable = EfiLibAllocatePool ((NumberOfEntries + 2) * sizeof (EFI_UNICODE_STRING_TABLE));
if (NewUnicodeStringTable == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// If the current Unicode String Table contains any entries, then copy them to the
// newly allocated Unicode String Table.
//
if (*UnicodeStringTable != NULL) {
EfiCopyMem (
NewUnicodeStringTable,
*UnicodeStringTable,
NumberOfEntries * sizeof (EFI_UNICODE_STRING_TABLE)
);
}
//
// Allocate space for a copy of the Language specifier
//
NewUnicodeStringTable[NumberOfEntries].Language = EfiLibAllocateCopyPool (EfiAsciiStrLen(Language) + 1, Language);
if (NewUnicodeStringTable[NumberOfEntries].Language == NULL) {
gBS->FreePool (NewUnicodeStringTable);
return EFI_OUT_OF_RESOURCES;
}
//
// Compute the length of the Unicode String
//
for (UnicodeStringLength = 0; UnicodeString[UnicodeStringLength] != 0; UnicodeStringLength++)
;
//
// Allocate space for a copy of the Unicode String
//
NewUnicodeStringTable[NumberOfEntries].UnicodeString = EfiLibAllocateCopyPool (
(UnicodeStringLength + 1) * sizeof (CHAR16),
UnicodeString
);
if (NewUnicodeStringTable[NumberOfEntries].UnicodeString == NULL) {
gBS->FreePool (NewUnicodeStringTable[NumberOfEntries].Language);
gBS->FreePool (NewUnicodeStringTable);
return EFI_OUT_OF_RESOURCES;
}
//
// Mark the end of the Unicode String Table
//
NewUnicodeStringTable[NumberOfEntries + 1].Language = NULL;
NewUnicodeStringTable[NumberOfEntries + 1].UnicodeString = NULL;
//
// Free the old Unicode String Table
//
if (*UnicodeStringTable != NULL) {
gBS->FreePool (*UnicodeStringTable);
}
//
// Point UnicodeStringTable at the newly allocated Unicode String Table
//
*UnicodeStringTable = NewUnicodeStringTable;
return EFI_SUCCESS;
}
SupportedLanguages = NextSupportedLanguage(SupportedLanguages);
}
return EFI_UNSUPPORTED;
}
EFI_STATUS
EfiLibFreeUnicodeStringTable (
IN OUT EFI_UNICODE_STRING_TABLE *UnicodeStringTable
)
/*++
Routine Description:
Free a string table.
Arguments:
UnicodeStringTable - The string table to be freed.
Returns:
EFI_SUCCESS - The table successfully freed.
--*/
{
UINTN Index;
//
// If the Unicode String Table is NULL, then it is already freed
//
if (UnicodeStringTable == NULL) {
return EFI_SUCCESS;
}
//
// Loop through the Unicode String Table until we reach the end of table marker
//
for (Index = 0; UnicodeStringTable[Index].Language != NULL; Index++) {
//
// Free the Language string from the Unicode String Table
//
gBS->FreePool (UnicodeStringTable[Index].Language);
//
// Free the Unicode String from the Unicode String Table
//
if (UnicodeStringTable[Index].UnicodeString != NULL) {
gBS->FreePool (UnicodeStringTable[Index].UnicodeString);
}
}
//
// Free the Unicode String Table itself
//
gBS->FreePool (UnicodeStringTable);
return EFI_SUCCESS;
}
|