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1e57a462 | 1 | /** @file NorFlashDxe.c\r |
2 | \r | |
dd917bae | 3 | Copyright (c) 2011 - 2020, Arm Limited. All rights reserved.<BR>\r |
1e57a462 | 4 | \r |
f4dfad05 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
1e57a462 | 6 | \r |
7 | **/\r | |
8 | \r | |
9 | #include <Library/UefiLib.h>\r | |
10 | #include <Library/BaseMemoryLib.h>\r | |
11 | #include <Library/MemoryAllocationLib.h>\r | |
12 | #include <Library/UefiBootServicesTableLib.h>\r | |
13 | #include <Library/PcdLib.h>\r | |
c2d1cf1b MK |
14 | #include <Library/HobLib.h>\r |
15 | #include <Library/DxeServicesTableLib.h>\r | |
1e57a462 | 16 | \r |
c2d1cf1b | 17 | #include "NorFlash.h"\r |
1e57a462 | 18 | \r |
1dbbfc17 | 19 | STATIC EFI_EVENT mNorFlashVirtualAddrChangeEvent;\r |
1e57a462 | 20 | \r |
21 | //\r | |
22 | // Global variable declarations\r | |
23 | //\r | |
24 | NOR_FLASH_INSTANCE **mNorFlashInstances;\r | |
1dbbfc17 | 25 | UINT32 mNorFlashDeviceCount;\r |
c2d1cf1b MK |
26 | UINTN mFlashNvStorageVariableBase;\r |
27 | EFI_EVENT mFvbVirtualAddrChangeEvent;\r | |
1e57a462 | 28 | \r |
29 | NOR_FLASH_INSTANCE mNorFlashInstanceTemplate = {\r | |
30 | NOR_FLASH_SIGNATURE, // Signature\r | |
31 | NULL, // Handle ... NEED TO BE FILLED\r | |
32 | \r | |
1e57a462 | 33 | 0, // DeviceBaseAddress ... NEED TO BE FILLED\r |
34 | 0, // RegionBaseAddress ... NEED TO BE FILLED\r | |
35 | 0, // Size ... NEED TO BE FILLED\r | |
36 | 0, // StartLba\r | |
37 | \r | |
1d5d0ae9 | 38 | {\r |
39 | EFI_BLOCK_IO_PROTOCOL_REVISION2, // Revision\r | |
40 | NULL, // Media ... NEED TO BE FILLED\r | |
41 | NorFlashBlockIoReset, // Reset;\r | |
1e57a462 | 42 | NorFlashBlockIoReadBlocks, // ReadBlocks\r |
43 | NorFlashBlockIoWriteBlocks, // WriteBlocks\r | |
1d5d0ae9 | 44 | NorFlashBlockIoFlushBlocks // FlushBlocks\r |
1e57a462 | 45 | }, // BlockIoProtocol\r |
46 | \r | |
1d5d0ae9 | 47 | {\r |
48 | 0, // MediaId ... NEED TO BE FILLED\r | |
49 | FALSE, // RemovableMedia\r | |
50 | TRUE, // MediaPresent\r | |
51 | FALSE, // LogicalPartition\r | |
52 | FALSE, // ReadOnly\r | |
53 | FALSE, // WriteCaching;\r | |
54 | 0, // BlockSize ... NEED TO BE FILLED\r | |
55 | 4, // IoAlign\r | |
56 | 0, // LastBlock ... NEED TO BE FILLED\r | |
57 | 0, // LowestAlignedLba\r | |
58 | 1, // LogicalBlocksPerPhysicalBlock\r | |
1e57a462 | 59 | }, //Media;\r |
60 | \r | |
452a9ee1 BJ |
61 | {\r |
62 | EFI_DISK_IO_PROTOCOL_REVISION, // Revision\r | |
63 | NorFlashDiskIoReadDisk, // ReadDisk\r | |
64 | NorFlashDiskIoWriteDisk // WriteDisk\r | |
65 | },\r | |
66 | \r | |
1d5d0ae9 | 67 | {\r |
1e57a462 | 68 | FvbGetAttributes, // GetAttributes\r |
69 | FvbSetAttributes, // SetAttributes\r | |
70 | FvbGetPhysicalAddress, // GetPhysicalAddress\r | |
71 | FvbGetBlockSize, // GetBlockSize\r | |
72 | FvbRead, // Read\r | |
73 | FvbWrite, // Write\r | |
1d5d0ae9 | 74 | FvbEraseBlocks, // EraseBlocks\r |
75 | NULL, //ParentHandle\r | |
1e57a462 | 76 | }, // FvbProtoccol;\r |
452a9ee1 | 77 | NULL, // ShadowBuffer\r |
1e57a462 | 78 | {\r |
79 | {\r | |
80 | {\r | |
81 | HARDWARE_DEVICE_PATH,\r | |
82 | HW_VENDOR_DP,\r | |
4ef11358 AB |
83 | {\r |
84 | (UINT8)(OFFSET_OF (NOR_FLASH_DEVICE_PATH, End)),\r | |
85 | (UINT8)(OFFSET_OF (NOR_FLASH_DEVICE_PATH, End) >> 8)\r | |
86 | }\r | |
1e57a462 | 87 | },\r |
b0fdce95 | 88 | { 0x0, 0x0, 0x0, { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } }, // GUID ... NEED TO BE FILLED\r |
1e57a462 | 89 | },\r |
8b902534 | 90 | 0, // Index\r |
1e57a462 | 91 | {\r |
92 | END_DEVICE_PATH_TYPE,\r | |
93 | END_ENTIRE_DEVICE_PATH_SUBTYPE,\r | |
b0fdce95 | 94 | { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 }\r |
1e57a462 | 95 | }\r |
96 | } // DevicePath\r | |
97 | };\r | |
98 | \r | |
99 | EFI_STATUS\r | |
100 | NorFlashCreateInstance (\r | |
101 | IN UINTN NorFlashDeviceBase,\r | |
102 | IN UINTN NorFlashRegionBase,\r | |
103 | IN UINTN NorFlashSize,\r | |
4ef11358 | 104 | IN UINT32 Index,\r |
1e57a462 | 105 | IN UINT32 BlockSize,\r |
106 | IN BOOLEAN SupportFvb,\r | |
1e57a462 | 107 | OUT NOR_FLASH_INSTANCE** NorFlashInstance\r |
108 | )\r | |
109 | {\r | |
110 | EFI_STATUS Status;\r | |
111 | NOR_FLASH_INSTANCE* Instance;\r | |
112 | \r | |
113 | ASSERT(NorFlashInstance != NULL);\r | |
114 | \r | |
2dff0c1a | 115 | Instance = AllocateRuntimeCopyPool (sizeof(NOR_FLASH_INSTANCE),&mNorFlashInstanceTemplate);\r |
1e57a462 | 116 | if (Instance == NULL) {\r |
117 | return EFI_OUT_OF_RESOURCES;\r | |
118 | }\r | |
119 | \r | |
120 | Instance->DeviceBaseAddress = NorFlashDeviceBase;\r | |
121 | Instance->RegionBaseAddress = NorFlashRegionBase;\r | |
122 | Instance->Size = NorFlashSize;\r | |
123 | \r | |
124 | Instance->BlockIoProtocol.Media = &Instance->Media;\r | |
4ef11358 | 125 | Instance->Media.MediaId = Index;\r |
1e57a462 | 126 | Instance->Media.BlockSize = BlockSize;\r |
127 | Instance->Media.LastBlock = (NorFlashSize / BlockSize)-1;\r | |
1d5d0ae9 | 128 | \r |
8b902534 AB |
129 | CopyGuid (&Instance->DevicePath.Vendor.Guid, &gEfiCallerIdGuid);\r |
130 | Instance->DevicePath.Index = (UINT8)Index;\r | |
1e57a462 | 131 | \r |
452a9ee1 BJ |
132 | Instance->ShadowBuffer = AllocateRuntimePool (BlockSize);;\r |
133 | if (Instance->ShadowBuffer == NULL) {\r | |
134 | return EFI_OUT_OF_RESOURCES;\r | |
135 | }\r | |
136 | \r | |
1e57a462 | 137 | if (SupportFvb) {\r |
0f87c53d | 138 | NorFlashFvbInitialize (Instance);\r |
1e57a462 | 139 | \r |
140 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
141 | &Instance->Handle,\r | |
142 | &gEfiDevicePathProtocolGuid, &Instance->DevicePath,\r | |
143 | &gEfiBlockIoProtocolGuid, &Instance->BlockIoProtocol,\r | |
144 | &gEfiFirmwareVolumeBlockProtocolGuid, &Instance->FvbProtocol,\r | |
145 | NULL\r | |
146 | );\r | |
147 | if (EFI_ERROR(Status)) {\r | |
2dff0c1a | 148 | FreePool (Instance);\r |
1e57a462 | 149 | return Status;\r |
150 | }\r | |
151 | } else {\r | |
1e57a462 | 152 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
153 | &Instance->Handle,\r | |
154 | &gEfiDevicePathProtocolGuid, &Instance->DevicePath,\r | |
155 | &gEfiBlockIoProtocolGuid, &Instance->BlockIoProtocol,\r | |
452a9ee1 | 156 | &gEfiDiskIoProtocolGuid, &Instance->DiskIoProtocol,\r |
1e57a462 | 157 | NULL\r |
158 | );\r | |
159 | if (EFI_ERROR(Status)) {\r | |
2dff0c1a | 160 | FreePool (Instance);\r |
1e57a462 | 161 | return Status;\r |
162 | }\r | |
163 | }\r | |
1d5d0ae9 | 164 | \r |
165 | *NorFlashInstance = Instance;\r | |
1e57a462 | 166 | return Status;\r |
167 | }\r | |
168 | \r | |
1e57a462 | 169 | /**\r |
22044caa | 170 | * This function unlock and erase an entire NOR Flash block.\r |
1e57a462 | 171 | **/\r |
172 | EFI_STATUS\r | |
173 | NorFlashUnlockAndEraseSingleBlock (\r | |
174 | IN NOR_FLASH_INSTANCE *Instance,\r | |
175 | IN UINTN BlockAddress\r | |
176 | )\r | |
177 | {\r | |
178 | EFI_STATUS Status;\r | |
179 | UINTN Index;\r | |
180 | EFI_TPL OriginalTPL;\r | |
181 | \r | |
2dff0c1a OM |
182 | if (!EfiAtRuntime ()) {\r |
183 | // Raise TPL to TPL_HIGH to stop anyone from interrupting us.\r | |
184 | OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);\r | |
185 | } else {\r | |
186 | // This initialization is only to prevent the compiler to complain about the\r | |
187 | // use of uninitialized variables\r | |
188 | OriginalTPL = TPL_HIGH_LEVEL;\r | |
189 | }\r | |
1e57a462 | 190 | \r |
191 | Index = 0;\r | |
192 | // The block erase might fail a first time (SW bug ?). Retry it ...\r | |
193 | do {\r | |
194 | // Unlock the block if we have to\r | |
195 | Status = NorFlashUnlockSingleBlockIfNecessary (Instance, BlockAddress);\r | |
22044caa OM |
196 | if (EFI_ERROR (Status)) {\r |
197 | break;\r | |
1e57a462 | 198 | }\r |
22044caa | 199 | Status = NorFlashEraseSingleBlock (Instance, BlockAddress);\r |
1e57a462 | 200 | Index++;\r |
201 | } while ((Index < NOR_FLASH_ERASE_RETRY) && (Status == EFI_WRITE_PROTECTED));\r | |
202 | \r | |
203 | if (Index == NOR_FLASH_ERASE_RETRY) {\r | |
204 | DEBUG((EFI_D_ERROR,"EraseSingleBlock(BlockAddress=0x%08x: Block Locked Error (try to erase %d times)\n", BlockAddress,Index));\r | |
205 | }\r | |
206 | \r | |
2dff0c1a OM |
207 | if (!EfiAtRuntime ()) {\r |
208 | // Interruptions can resume.\r | |
209 | gBS->RestoreTPL (OriginalTPL);\r | |
210 | }\r | |
1e57a462 | 211 | \r |
212 | return Status;\r | |
213 | }\r | |
214 | \r | |
1e57a462 | 215 | EFI_STATUS\r |
452a9ee1 | 216 | NorFlashWriteFullBlock (\r |
1e57a462 | 217 | IN NOR_FLASH_INSTANCE *Instance,\r |
218 | IN EFI_LBA Lba,\r | |
219 | IN UINT32 *DataBuffer,\r | |
220 | IN UINT32 BlockSizeInWords\r | |
221 | )\r | |
222 | {\r | |
223 | EFI_STATUS Status;\r | |
224 | UINTN WordAddress;\r | |
225 | UINT32 WordIndex;\r | |
226 | UINTN BufferIndex;\r | |
227 | UINTN BlockAddress;\r | |
228 | UINTN BuffersInBlock;\r | |
229 | UINTN RemainingWords;\r | |
230 | EFI_TPL OriginalTPL;\r | |
518c243d | 231 | UINTN Cnt;\r |
1e57a462 | 232 | \r |
233 | Status = EFI_SUCCESS;\r | |
234 | \r | |
235 | // Get the physical address of the block\r | |
236 | BlockAddress = GET_NOR_BLOCK_ADDRESS (Instance->RegionBaseAddress, Lba, BlockSizeInWords * 4);\r | |
237 | \r | |
238 | // Start writing from the first address at the start of the block\r | |
239 | WordAddress = BlockAddress;\r | |
240 | \r | |
2dff0c1a OM |
241 | if (!EfiAtRuntime ()) {\r |
242 | // Raise TPL to TPL_HIGH to stop anyone from interrupting us.\r | |
243 | OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);\r | |
244 | } else {\r | |
245 | // This initialization is only to prevent the compiler to complain about the\r | |
246 | // use of uninitialized variables\r | |
247 | OriginalTPL = TPL_HIGH_LEVEL;\r | |
248 | }\r | |
1e57a462 | 249 | \r |
250 | Status = NorFlashUnlockAndEraseSingleBlock (Instance, BlockAddress);\r | |
251 | if (EFI_ERROR(Status)) {\r | |
252 | DEBUG((EFI_D_ERROR, "WriteSingleBlock: ERROR - Failed to Unlock and Erase the single block at 0x%X\n", BlockAddress));\r | |
253 | goto EXIT;\r | |
254 | }\r | |
255 | \r | |
256 | // To speed up the programming operation, NOR Flash is programmed using the Buffered Programming method.\r | |
257 | \r | |
258 | // Check that the address starts at a 32-word boundary, i.e. last 7 bits must be zero\r | |
259 | if ((WordAddress & BOUNDARY_OF_32_WORDS) == 0x00) {\r | |
260 | \r | |
261 | // First, break the entire block into buffer-sized chunks.\r | |
82745213 | 262 | BuffersInBlock = (UINTN)(BlockSizeInWords * 4) / P30_MAX_BUFFER_SIZE_IN_BYTES;\r |
1e57a462 | 263 | \r |
264 | // Then feed each buffer chunk to the NOR Flash\r | |
518c243d | 265 | // If a buffer does not contain any data, don't write it.\r |
1e57a462 | 266 | for(BufferIndex=0;\r |
267 | BufferIndex < BuffersInBlock;\r | |
268 | BufferIndex++, WordAddress += P30_MAX_BUFFER_SIZE_IN_BYTES, DataBuffer += P30_MAX_BUFFER_SIZE_IN_WORDS\r | |
269 | ) {\r | |
518c243d HL |
270 | // Check the buffer to see if it contains any data (not set all 1s).\r |
271 | for (Cnt = 0; Cnt < P30_MAX_BUFFER_SIZE_IN_WORDS; Cnt++) {\r | |
272 | if (~DataBuffer[Cnt] != 0 ) {\r | |
273 | // Some data found, write the buffer.\r | |
274 | Status = NorFlashWriteBuffer (Instance, WordAddress, P30_MAX_BUFFER_SIZE_IN_BYTES,\r | |
275 | DataBuffer);\r | |
276 | if (EFI_ERROR(Status)) {\r | |
277 | goto EXIT;\r | |
278 | }\r | |
279 | break;\r | |
280 | }\r | |
1e57a462 | 281 | }\r |
282 | }\r | |
283 | \r | |
284 | // Finally, finish off any remaining words that are less than the maximum size of the buffer\r | |
285 | RemainingWords = BlockSizeInWords % P30_MAX_BUFFER_SIZE_IN_WORDS;\r | |
286 | \r | |
287 | if(RemainingWords != 0) {\r | |
288 | Status = NorFlashWriteBuffer (Instance, WordAddress, (RemainingWords * 4), DataBuffer);\r | |
289 | if (EFI_ERROR(Status)) {\r | |
290 | goto EXIT;\r | |
291 | }\r | |
292 | }\r | |
293 | \r | |
294 | } else {\r | |
295 | // For now, use the single word programming algorithm\r | |
296 | // It is unlikely that the NOR Flash will exist in an address which falls within a 32 word boundary range,\r | |
297 | // i.e. which ends in the range 0x......01 - 0x......7F.\r | |
298 | for(WordIndex=0; WordIndex<BlockSizeInWords; WordIndex++, DataBuffer++, WordAddress = WordAddress + 4) {\r | |
299 | Status = NorFlashWriteSingleWord (Instance, WordAddress, *DataBuffer);\r | |
300 | if (EFI_ERROR(Status)) {\r | |
301 | goto EXIT;\r | |
302 | }\r | |
303 | }\r | |
304 | }\r | |
305 | \r | |
306 | EXIT:\r | |
2dff0c1a OM |
307 | if (!EfiAtRuntime ()) {\r |
308 | // Interruptions can resume.\r | |
309 | gBS->RestoreTPL (OriginalTPL);\r | |
310 | }\r | |
1e57a462 | 311 | \r |
312 | if (EFI_ERROR(Status)) {\r | |
313 | DEBUG((EFI_D_ERROR, "NOR FLASH Programming [WriteSingleBlock] failed at address 0x%08x. Exit Status = \"%r\".\n", WordAddress, Status));\r | |
314 | }\r | |
315 | return Status;\r | |
316 | }\r | |
317 | \r | |
1e57a462 | 318 | EFI_STATUS\r |
319 | EFIAPI\r | |
320 | NorFlashInitialise (\r | |
321 | IN EFI_HANDLE ImageHandle,\r | |
322 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
323 | )\r | |
324 | {\r | |
325 | EFI_STATUS Status;\r | |
326 | UINT32 Index;\r | |
327 | NOR_FLASH_DESCRIPTION* NorFlashDevices;\r | |
1e57a462 | 328 | BOOLEAN ContainVariableStorage;\r |
329 | \r | |
330 | Status = NorFlashPlatformInitialization ();\r | |
331 | if (EFI_ERROR(Status)) {\r | |
332 | DEBUG((EFI_D_ERROR,"NorFlashInitialise: Fail to initialize Nor Flash devices\n"));\r | |
333 | return Status;\r | |
334 | }\r | |
335 | \r | |
1dbbfc17 | 336 | Status = NorFlashPlatformGetDevices (&NorFlashDevices, &mNorFlashDeviceCount);\r |
1e57a462 | 337 | if (EFI_ERROR(Status)) {\r |
338 | DEBUG((EFI_D_ERROR,"NorFlashInitialise: Fail to get Nor Flash devices\n"));\r | |
339 | return Status;\r | |
340 | }\r | |
341 | \r | |
1dbbfc17 | 342 | mNorFlashInstances = AllocateRuntimePool (sizeof(NOR_FLASH_INSTANCE*) * mNorFlashDeviceCount);\r |
1e57a462 | 343 | \r |
1dbbfc17 | 344 | for (Index = 0; Index < mNorFlashDeviceCount; Index++) {\r |
1e57a462 | 345 | // Check if this NOR Flash device contain the variable storage region\r |
346 | ContainVariableStorage =\r | |
347 | (NorFlashDevices[Index].RegionBaseAddress <= PcdGet32 (PcdFlashNvStorageVariableBase)) &&\r | |
348 | (PcdGet32 (PcdFlashNvStorageVariableBase) + PcdGet32 (PcdFlashNvStorageVariableSize) <= NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);\r | |
349 | \r | |
350 | Status = NorFlashCreateInstance (\r | |
351 | NorFlashDevices[Index].DeviceBaseAddress,\r | |
352 | NorFlashDevices[Index].RegionBaseAddress,\r | |
353 | NorFlashDevices[Index].Size,\r | |
354 | Index,\r | |
355 | NorFlashDevices[Index].BlockSize,\r | |
356 | ContainVariableStorage,\r | |
1e57a462 | 357 | &mNorFlashInstances[Index]\r |
358 | );\r | |
359 | if (EFI_ERROR(Status)) {\r | |
360 | DEBUG((EFI_D_ERROR,"NorFlashInitialise: Fail to create instance for NorFlash[%d]\n",Index));\r | |
361 | }\r | |
362 | }\r | |
363 | \r | |
1dbbfc17 OM |
364 | //\r |
365 | // Register for the virtual address change event\r | |
366 | //\r | |
367 | Status = gBS->CreateEventEx (\r | |
368 | EVT_NOTIFY_SIGNAL,\r | |
369 | TPL_NOTIFY,\r | |
370 | NorFlashVirtualNotifyEvent,\r | |
371 | NULL,\r | |
372 | &gEfiEventVirtualAddressChangeGuid,\r | |
373 | &mNorFlashVirtualAddrChangeEvent\r | |
374 | );\r | |
375 | ASSERT_EFI_ERROR (Status);\r | |
376 | \r | |
1e57a462 | 377 | return Status;\r |
378 | }\r | |
c2d1cf1b MK |
379 | \r |
380 | EFI_STATUS\r | |
381 | EFIAPI\r | |
382 | NorFlashFvbInitialize (\r | |
383 | IN NOR_FLASH_INSTANCE* Instance\r | |
384 | )\r | |
385 | {\r | |
386 | EFI_STATUS Status;\r | |
387 | UINT32 FvbNumLba;\r | |
388 | EFI_BOOT_MODE BootMode;\r | |
389 | UINTN RuntimeMmioRegionSize;\r | |
390 | \r | |
391 | DEBUG((DEBUG_BLKIO,"NorFlashFvbInitialize\n"));\r | |
392 | ASSERT((Instance != NULL));\r | |
393 | \r | |
394 | //\r | |
395 | // Declare the Non-Volatile storage as EFI_MEMORY_RUNTIME\r | |
396 | //\r | |
397 | \r | |
398 | // Note: all the NOR Flash region needs to be reserved into the UEFI Runtime memory;\r | |
399 | // even if we only use the small block region at the top of the NOR Flash.\r | |
400 | // The reason is when the NOR Flash memory is set into program mode, the command\r | |
401 | // is written as the base of the flash region (ie: Instance->DeviceBaseAddress)\r | |
402 | RuntimeMmioRegionSize = (Instance->RegionBaseAddress - Instance->DeviceBaseAddress) + Instance->Size;\r | |
403 | \r | |
404 | Status = gDS->AddMemorySpace (\r | |
405 | EfiGcdMemoryTypeMemoryMappedIo,\r | |
406 | Instance->DeviceBaseAddress, RuntimeMmioRegionSize,\r | |
407 | EFI_MEMORY_UC | EFI_MEMORY_RUNTIME\r | |
408 | );\r | |
409 | ASSERT_EFI_ERROR (Status);\r | |
410 | \r | |
411 | Status = gDS->SetMemorySpaceAttributes (\r | |
412 | Instance->DeviceBaseAddress, RuntimeMmioRegionSize,\r | |
413 | EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);\r | |
414 | ASSERT_EFI_ERROR (Status);\r | |
415 | \r | |
416 | mFlashNvStorageVariableBase = PcdGet32 (PcdFlashNvStorageVariableBase);\r | |
417 | \r | |
418 | // Set the index of the first LBA for the FVB\r | |
419 | Instance->StartLba = (PcdGet32 (PcdFlashNvStorageVariableBase) - Instance->RegionBaseAddress) / Instance->Media.BlockSize;\r | |
420 | \r | |
421 | BootMode = GetBootModeHob ();\r | |
422 | if (BootMode == BOOT_WITH_DEFAULT_SETTINGS) {\r | |
423 | Status = EFI_INVALID_PARAMETER;\r | |
424 | } else {\r | |
425 | // Determine if there is a valid header at the beginning of the NorFlash\r | |
426 | Status = ValidateFvHeader (Instance);\r | |
427 | }\r | |
428 | \r | |
429 | // Install the Default FVB header if required\r | |
430 | if (EFI_ERROR(Status)) {\r | |
431 | // There is no valid header, so time to install one.\r | |
432 | DEBUG ((DEBUG_INFO, "%a: The FVB Header is not valid.\n", __FUNCTION__));\r | |
433 | DEBUG ((DEBUG_INFO, "%a: Installing a correct one for this volume.\n",\r | |
434 | __FUNCTION__));\r | |
435 | \r | |
436 | // Erase all the NorFlash that is reserved for variable storage\r | |
437 | FvbNumLba = (PcdGet32(PcdFlashNvStorageVariableSize) + PcdGet32(PcdFlashNvStorageFtwWorkingSize) + PcdGet32(PcdFlashNvStorageFtwSpareSize)) / Instance->Media.BlockSize;\r | |
438 | \r | |
439 | Status = FvbEraseBlocks (&Instance->FvbProtocol, (EFI_LBA)0, FvbNumLba, EFI_LBA_LIST_TERMINATOR);\r | |
440 | if (EFI_ERROR(Status)) {\r | |
441 | return Status;\r | |
442 | }\r | |
443 | \r | |
444 | // Install all appropriate headers\r | |
445 | Status = InitializeFvAndVariableStoreHeaders (Instance);\r | |
446 | if (EFI_ERROR(Status)) {\r | |
447 | return Status;\r | |
448 | }\r | |
449 | }\r | |
450 | \r | |
451 | //\r | |
452 | // The driver implementing the variable read service can now be dispatched;\r | |
453 | // the varstore headers are in place.\r | |
454 | //\r | |
455 | Status = gBS->InstallProtocolInterface (\r | |
456 | &gImageHandle,\r | |
457 | &gEdkiiNvVarStoreFormattedGuid,\r | |
458 | EFI_NATIVE_INTERFACE,\r | |
459 | NULL\r | |
460 | );\r | |
461 | ASSERT_EFI_ERROR (Status);\r | |
462 | \r | |
463 | //\r | |
464 | // Register for the virtual address change event\r | |
465 | //\r | |
466 | Status = gBS->CreateEventEx (\r | |
467 | EVT_NOTIFY_SIGNAL,\r | |
468 | TPL_NOTIFY,\r | |
469 | FvbVirtualNotifyEvent,\r | |
470 | NULL,\r | |
471 | &gEfiEventVirtualAddressChangeGuid,\r | |
472 | &mFvbVirtualAddrChangeEvent\r | |
473 | );\r | |
474 | ASSERT_EFI_ERROR (Status);\r | |
475 | \r | |
476 | return Status;\r | |
477 | }\r |