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1 | /** @file\r | |
2 | \r | |
3 | Copyright (c) 2015, ARM Ltd. All rights reserved.<BR>\r | |
4 | \r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "FdtPlatform.h"\r | |
16 | \r | |
17 | #include <Library/PcdLib.h>\r | |
18 | #include <Library/DevicePathLib.h>\r | |
19 | #include <Library/BdsLib.h>\r | |
20 | \r | |
21 | #include <Protocol/DevicePath.h>\r | |
22 | \r | |
23 | //\r | |
24 | // Internal variables\r | |
25 | //\r | |
26 | \r | |
27 | STATIC CONST EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL mShellDynCmdProtocolSetFdt = {\r | |
28 | L"setfdt", // Name of the command\r | |
29 | ShellDynCmdSetFdtHandler, // Handler\r | |
30 | ShellDynCmdSetFdtGetHelp // GetHelp\r | |
31 | };\r | |
32 | \r | |
33 | STATIC CONST EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL mShellDynCmdProtocolDumpFdt = {\r | |
34 | L"dumpfdt", // Name of the command\r | |
35 | ShellDynCmdDumpFdtHandler, // Handler\r | |
36 | ShellDynCmdDumpFdtGetHelp // GetHelp\r | |
37 | };\r | |
38 | \r | |
39 | STATIC CONST EFI_GUID mFdtPlatformDxeHiiGuid = {\r | |
40 | 0x8afa7610, 0x62b1, 0x46aa,\r | |
41 | {0xb5, 0x34, 0xc3, 0xde, 0xff, 0x39, 0x77, 0x8c}\r | |
42 | };\r | |
43 | \r | |
44 | EFI_HANDLE mFdtPlatformDxeHiiHandle;\r | |
45 | \r | |
46 | /**\r | |
47 | Install the FDT specified by its device path in text form.\r | |
48 | \r | |
49 | @param[in] TextDevicePath Device path of the FDT to install in text form\r | |
50 | \r | |
51 | @retval EFI_SUCCESS The FDT was installed.\r | |
52 | @retval EFI_NOT_FOUND Failed to locate a protocol or a file.\r | |
53 | @retval EFI_INVALID_PARAMETER Invalid device path.\r | |
54 | @retval EFI_UNSUPPORTED Device path not supported.\r | |
55 | @retval EFI_OUT_OF_RESOURCES An allocation failed.\r | |
56 | **/\r | |
57 | STATIC\r | |
58 | EFI_STATUS\r | |
59 | InstallFdt (\r | |
60 | IN CONST CHAR16* TextDevicePath\r | |
61 | )\r | |
62 | {\r | |
63 | EFI_STATUS Status;\r | |
64 | EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *EfiDevicePathFromTextProtocol;\r | |
65 | EFI_DEVICE_PATH *DevicePath;\r | |
66 | EFI_PHYSICAL_ADDRESS FdtBlobBase;\r | |
67 | UINTN FdtBlobSize;\r | |
68 | UINTN NumPages;\r | |
69 | EFI_PHYSICAL_ADDRESS FdtConfigurationTableBase;\r | |
70 | \r | |
71 | Status = gBS->LocateProtocol (\r | |
72 | &gEfiDevicePathFromTextProtocolGuid,\r | |
73 | NULL,\r | |
74 | (VOID **)&EfiDevicePathFromTextProtocol\r | |
75 | );\r | |
76 | if (EFI_ERROR (Status)) {\r | |
77 | DEBUG ((EFI_D_ERROR, "InstallFdt() - Failed to locate EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL protocol\n"));\r | |
78 | return Status;\r | |
79 | }\r | |
80 | \r | |
81 | DevicePath = (EFI_DEVICE_PATH*)EfiDevicePathFromTextProtocol->ConvertTextToDevicePath (TextDevicePath);\r | |
82 | if (DevicePath == NULL) {\r | |
83 | return EFI_INVALID_PARAMETER;\r | |
84 | }\r | |
85 | \r | |
86 | //\r | |
87 | // Load the FDT given its device path.\r | |
88 | // This operation may fail if the device path is not supported.\r | |
89 | //\r | |
90 | FdtBlobBase = 0;\r | |
91 | NumPages = 0;\r | |
92 | Status = BdsLoadImage (DevicePath, AllocateAnyPages, &FdtBlobBase, &FdtBlobSize);\r | |
93 | if (EFI_ERROR (Status)) {\r | |
94 | goto Error;\r | |
95 | }\r | |
96 | \r | |
97 | //\r | |
98 | // Ensure that the FDT header is valid and that the Size of the Device Tree\r | |
99 | // is smaller than the size of the read file\r | |
100 | //\r | |
101 | if (fdt_check_header ((VOID*)(UINTN)FdtBlobBase) != 0 ||\r | |
102 | (UINTN)fdt_totalsize ((VOID*)(UINTN)FdtBlobBase) > FdtBlobSize) {\r | |
103 | DEBUG ((EFI_D_ERROR, "InstallFdt() - loaded FDT binary image seems corrupt\n"));\r | |
104 | Status = EFI_LOAD_ERROR;\r | |
105 | goto Error;\r | |
106 | }\r | |
107 | \r | |
108 | //\r | |
109 | // Store the FDT as Runtime Service Data to prevent the Kernel from\r | |
110 | // overwritting its data.\r | |
111 | //\r | |
112 | NumPages = EFI_SIZE_TO_PAGES (FdtBlobSize);\r | |
113 | Status = gBS->AllocatePages (\r | |
114 | AllocateAnyPages, EfiRuntimeServicesData,\r | |
115 | NumPages, &FdtConfigurationTableBase\r | |
116 | );\r | |
117 | if (EFI_ERROR (Status)) {\r | |
118 | goto Error;\r | |
119 | }\r | |
120 | CopyMem (\r | |
121 | (VOID*)(UINTN)FdtConfigurationTableBase,\r | |
122 | (VOID*)(UINTN)FdtBlobBase,\r | |
123 | FdtBlobSize\r | |
124 | );\r | |
125 | \r | |
126 | //\r | |
127 | // Install the FDT into the Configuration Table\r | |
128 | //\r | |
129 | Status = gBS->InstallConfigurationTable (\r | |
130 | &gFdtTableGuid,\r | |
131 | (VOID*)(UINTN)FdtConfigurationTableBase\r | |
132 | );\r | |
133 | if (EFI_ERROR (Status)) {\r | |
134 | gBS->FreePages (FdtConfigurationTableBase, NumPages);\r | |
135 | }\r | |
136 | \r | |
137 | Error:\r | |
138 | if (FdtBlobBase != 0) {\r | |
139 | gBS->FreePages (FdtBlobBase, NumPages);\r | |
140 | }\r | |
141 | FreePool (DevicePath);\r | |
142 | \r | |
143 | return Status;\r | |
144 | }\r | |
145 | \r | |
146 | /**\r | |
147 | Main entry point of the FDT platform driver.\r | |
148 | \r | |
149 | @param[in] ImageHandle The firmware allocated handle for the present driver\r | |
150 | UEFI image.\r | |
151 | @param[in] *SystemTable A pointer to the EFI System table.\r | |
152 | \r | |
153 | @retval EFI_SUCCESS The driver was initialized.\r | |
154 | @retval EFI_OUT_OF_RESOURCES The "End of DXE" event could not be allocated or\r | |
155 | there was not enough memory in pool to install\r | |
156 | the Shell Dynamic Command protocol.\r | |
157 | @retval EFI_LOAD_ERROR Unable to add the HII package.\r | |
158 | \r | |
159 | **/\r | |
160 | EFI_STATUS\r | |
161 | FdtPlatformEntryPoint (\r | |
162 | IN EFI_HANDLE ImageHandle,\r | |
163 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
164 | )\r | |
165 | {\r | |
166 | EFI_STATUS Status;\r | |
167 | EFI_HANDLE Handle;\r | |
168 | \r | |
169 | //\r | |
170 | // Install the Device Tree from its expected location\r | |
171 | //\r | |
172 | Status = RunFdtInstallation (NULL);\r | |
173 | \r | |
174 | if (FeaturePcdGet (PcdOverridePlatformFdt) || FeaturePcdGet (PcdDumpFdtShellCommand)) {\r | |
175 | //\r | |
176 | // Register the strings for the user interface in the HII Database.\r | |
177 | // This shows the way to the multi-language support, even if\r | |
178 | // only the English language is actually supported. The strings to register\r | |
179 | // are stored in the "ShellSetFdtStrings[]" array. This array is\r | |
180 | // built by the building process from the "*.uni" file associated to\r | |
181 | // the present driver (cf. FdtPlatfromDxe.inf). Examine your Build\r | |
182 | // folder under your package's DEBUG folder and you will find the array\r | |
183 | // defined in a xxxStrDefs.h file.\r | |
184 | //\r | |
185 | mFdtPlatformDxeHiiHandle = HiiAddPackages (\r | |
186 | &mFdtPlatformDxeHiiGuid,\r | |
187 | ImageHandle,\r | |
188 | FdtPlatformDxeStrings,\r | |
189 | NULL\r | |
190 | );\r | |
191 | }\r | |
192 | \r | |
193 | //\r | |
194 | // If the development features are enabled, install the dynamic shell\r | |
195 | // command "setfdt" to be able to define a device path for the FDT\r | |
196 | // that has precedence over the device paths defined by\r | |
197 | // "PcdFdtDevicePaths".\r | |
198 | //\r | |
199 | \r | |
200 | if (FeaturePcdGet (PcdOverridePlatformFdt)) {\r | |
201 | if (mFdtPlatformDxeHiiHandle != NULL) {\r | |
202 | // We install dynamic EFI command on separate handles as we cannot register\r | |
203 | // more than one protocol of the same protocol interface on the same handle.\r | |
204 | Handle = NULL;\r | |
205 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
206 | &Handle,\r | |
207 | &gEfiShellDynamicCommandProtocolGuid,\r | |
208 | &mShellDynCmdProtocolSetFdt,\r | |
209 | NULL\r | |
210 | );\r | |
211 | if (EFI_ERROR (Status)) {\r | |
212 | HiiRemovePackages (mFdtPlatformDxeHiiHandle);\r | |
213 | }\r | |
214 | } else {\r | |
215 | Status = EFI_LOAD_ERROR;\r | |
216 | }\r | |
217 | if (EFI_ERROR (Status)) {\r | |
218 | DEBUG ((\r | |
219 | EFI_D_WARN,\r | |
220 | "Unable to install \"setfdt\" EFI Shell command - %r \n",\r | |
221 | Status\r | |
222 | ));\r | |
223 | }\r | |
224 | }\r | |
225 | \r | |
226 | if (FeaturePcdGet (PcdDumpFdtShellCommand)) {\r | |
227 | if (mFdtPlatformDxeHiiHandle != NULL) {\r | |
228 | // We install dynamic EFI command on separate handles as we cannot register\r | |
229 | // more than one protocol of the same protocol interface on the same handle.\r | |
230 | Handle = NULL;\r | |
231 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
232 | &Handle,\r | |
233 | &gEfiShellDynamicCommandProtocolGuid,\r | |
234 | &mShellDynCmdProtocolDumpFdt,\r | |
235 | NULL\r | |
236 | );\r | |
237 | if (EFI_ERROR (Status)) {\r | |
238 | HiiRemovePackages (mFdtPlatformDxeHiiHandle);\r | |
239 | }\r | |
240 | } else {\r | |
241 | Status = EFI_LOAD_ERROR;\r | |
242 | }\r | |
243 | if (EFI_ERROR (Status)) {\r | |
244 | DEBUG ((\r | |
245 | EFI_D_WARN,\r | |
246 | "Unable to install \"dumpfdt\" EFI Shell command - %r \n",\r | |
247 | Status\r | |
248 | ));\r | |
249 | }\r | |
250 | }\r | |
251 | \r | |
252 | return Status;\r | |
253 | }\r | |
254 | \r | |
255 | /**\r | |
256 | Run the FDT installation process.\r | |
257 | \r | |
258 | Loop in priority order over the device paths from which the FDT has\r | |
259 | been asked to be retrieved for. For each device path, try to install\r | |
260 | the FDT. Stop as soon as an installation succeeds.\r | |
261 | \r | |
262 | @param[in] SuccessfullDevicePath If not NULL, address where to store the\r | |
263 | pointer to the text device path from\r | |
264 | which the FDT was successfully retrieved.\r | |
265 | Not used if the FDT installation failed.\r | |
266 | The returned address is the address of\r | |
267 | an allocated buffer that has to be\r | |
268 | freed by the caller.\r | |
269 | \r | |
270 | @retval EFI_SUCCESS The FDT was installed.\r | |
271 | @retval EFI_NOT_FOUND Failed to locate a protocol or a file.\r | |
272 | @retval EFI_INVALID_PARAMETER Invalid device path.\r | |
273 | @retval EFI_UNSUPPORTED Device path not supported.\r | |
274 | @retval EFI_OUT_OF_RESOURCES An allocation failed.\r | |
275 | \r | |
276 | **/\r | |
277 | EFI_STATUS\r | |
278 | RunFdtInstallation (\r | |
279 | OUT CHAR16 **SuccessfullDevicePath\r | |
280 | )\r | |
281 | {\r | |
282 | EFI_STATUS Status;\r | |
283 | UINTN DataSize;\r | |
284 | CHAR16 *TextDevicePath;\r | |
285 | CHAR16 *TextDevicePathStart;\r | |
286 | CHAR16 *TextDevicePathSeparator;\r | |
287 | UINTN TextDevicePathLen;\r | |
288 | \r | |
289 | TextDevicePath = NULL;\r | |
290 | //\r | |
291 | // For development purpose, if enabled through the "PcdOverridePlatformFdt"\r | |
292 | // feature PCD, try first to install the FDT specified by the device path in\r | |
293 | // text form stored in the "Fdt" UEFI variable.\r | |
294 | //\r | |
295 | if (FeaturePcdGet (PcdOverridePlatformFdt)) {\r | |
296 | DataSize = 0;\r | |
297 | Status = gRT->GetVariable (\r | |
298 | L"Fdt",\r | |
299 | &gFdtVariableGuid,\r | |
300 | NULL,\r | |
301 | &DataSize,\r | |
302 | NULL\r | |
303 | );\r | |
304 | \r | |
305 | //\r | |
306 | // Keep going only if the "Fdt" variable is defined.\r | |
307 | //\r | |
308 | \r | |
309 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
310 | TextDevicePath = AllocatePool (DataSize);\r | |
311 | if (TextDevicePath == NULL) {\r | |
312 | Status = EFI_OUT_OF_RESOURCES;\r | |
313 | goto Error;\r | |
314 | }\r | |
315 | \r | |
316 | Status = gRT->GetVariable (\r | |
317 | L"Fdt",\r | |
318 | &gFdtVariableGuid,\r | |
319 | NULL,\r | |
320 | &DataSize,\r | |
321 | TextDevicePath\r | |
322 | );\r | |
323 | if (EFI_ERROR (Status)) {\r | |
324 | FreePool (TextDevicePath);\r | |
325 | goto Error;\r | |
326 | }\r | |
327 | \r | |
328 | Status = InstallFdt (TextDevicePath);\r | |
329 | if (!EFI_ERROR (Status)) {\r | |
330 | DEBUG ((\r | |
331 | EFI_D_WARN,\r | |
332 | "Installation of the FDT using the device path <%s> completed.\n",\r | |
333 | TextDevicePath\r | |
334 | ));\r | |
335 | goto Done;\r | |
336 | }\r | |
337 | DEBUG ((\r | |
338 | EFI_D_ERROR,\r | |
339 | "Installation of the FDT specified by the \"Fdt\" UEFI variable failed - %r\n",\r | |
340 | Status\r | |
341 | ));\r | |
342 | FreePool (TextDevicePath);\r | |
343 | }\r | |
344 | }\r | |
345 | \r | |
346 | //\r | |
347 | // Loop over the device path list provided by "PcdFdtDevicePaths". The device\r | |
348 | // paths are in text form and separated by a semi-colon.\r | |
349 | //\r | |
350 | \r | |
351 | Status = EFI_NOT_FOUND;\r | |
352 | for (TextDevicePathStart = (CHAR16*)PcdGetPtr (PcdFdtDevicePaths);\r | |
353 | *TextDevicePathStart != L'\0' ; ) {\r | |
354 | TextDevicePathSeparator = StrStr (TextDevicePathStart, L";");\r | |
355 | \r | |
356 | //\r | |
357 | // Last device path of the list\r | |
358 | //\r | |
359 | if (TextDevicePathSeparator == NULL) {\r | |
360 | TextDevicePathLen = StrLen (TextDevicePathStart);\r | |
361 | } else {\r | |
362 | TextDevicePathLen = (UINTN)(TextDevicePathSeparator - TextDevicePathStart);\r | |
363 | }\r | |
364 | \r | |
365 | TextDevicePath = AllocateCopyPool (\r | |
366 | (TextDevicePathLen + 1) * sizeof (CHAR16),\r | |
367 | TextDevicePathStart\r | |
368 | );\r | |
369 | if (TextDevicePath == NULL) {\r | |
370 | Status = EFI_OUT_OF_RESOURCES;\r | |
371 | goto Error;\r | |
372 | }\r | |
373 | TextDevicePath[TextDevicePathLen] = L'\0';\r | |
374 | \r | |
375 | Status = InstallFdt (TextDevicePath);\r | |
376 | if (!EFI_ERROR (Status)) {\r | |
377 | DEBUG ((EFI_D_WARN, "Installation of the FDT using the device path <%s> completed.\n",\r | |
378 | TextDevicePath\r | |
379 | ));\r | |
380 | goto Done;\r | |
381 | }\r | |
382 | \r | |
383 | DEBUG ((EFI_D_WARN, "Installation of the FDT using the device path <%s> failed - %r.\n",\r | |
384 | TextDevicePath, Status\r | |
385 | ));\r | |
386 | FreePool (TextDevicePath);\r | |
387 | \r | |
388 | if (TextDevicePathSeparator == NULL) {\r | |
389 | goto Error;\r | |
390 | }\r | |
391 | TextDevicePathStart = TextDevicePathSeparator + 1;\r | |
392 | }\r | |
393 | \r | |
394 | Error:\r | |
395 | Done:\r | |
396 | \r | |
397 | if (EFI_ERROR (Status)) {\r | |
398 | DEBUG ((EFI_D_ERROR, "Failed to install the FDT - %r.\n", Status));\r | |
399 | return Status;\r | |
400 | }\r | |
401 | \r | |
402 | if (SuccessfullDevicePath != NULL) {\r | |
403 | *SuccessfullDevicePath = TextDevicePath;\r | |
404 | } else {\r | |
405 | FreePool (TextDevicePath);\r | |
406 | }\r | |
407 | \r | |
408 | return EFI_SUCCESS;\r | |
409 | }\r | |
410 | \r | |
411 | /**\r | |
412 | Transcode one of the EFI return code used by the model into an EFI Shell return code.\r | |
413 | \r | |
414 | @param[in] Status EFI return code.\r | |
415 | \r | |
416 | @return Transcoded EFI Shell return code.\r | |
417 | \r | |
418 | **/\r | |
419 | SHELL_STATUS\r | |
420 | EfiCodeToShellCode (\r | |
421 | IN EFI_STATUS Status\r | |
422 | )\r | |
423 | {\r | |
424 | SHELL_STATUS ShellStatus;\r | |
425 | \r | |
426 | switch (Status) {\r | |
427 | case EFI_SUCCESS :\r | |
428 | ShellStatus = SHELL_SUCCESS;\r | |
429 | break;\r | |
430 | \r | |
431 | case EFI_INVALID_PARAMETER :\r | |
432 | ShellStatus = SHELL_INVALID_PARAMETER;\r | |
433 | break;\r | |
434 | \r | |
435 | case EFI_UNSUPPORTED :\r | |
436 | ShellStatus = SHELL_UNSUPPORTED;\r | |
437 | break;\r | |
438 | \r | |
439 | case EFI_DEVICE_ERROR :\r | |
440 | ShellStatus = SHELL_DEVICE_ERROR;\r | |
441 | break;\r | |
442 | \r | |
443 | case EFI_WRITE_PROTECTED :\r | |
444 | case EFI_SECURITY_VIOLATION :\r | |
445 | ShellStatus = SHELL_ACCESS_DENIED;\r | |
446 | break;\r | |
447 | \r | |
448 | case EFI_OUT_OF_RESOURCES :\r | |
449 | ShellStatus = SHELL_OUT_OF_RESOURCES;\r | |
450 | break;\r | |
451 | \r | |
452 | case EFI_NOT_FOUND :\r | |
453 | ShellStatus = SHELL_NOT_FOUND;\r | |
454 | break;\r | |
455 | \r | |
456 | default :\r | |
457 | ShellStatus = SHELL_ABORTED;\r | |
458 | }\r | |
459 | \r | |
460 | return ShellStatus;\r | |
461 | }\r |