1 /** @file 2 MDE DXE Services Library provides functions that simplify the development of DXE Drivers. 3 These functions help access data from sections of FFS files or from file path. 4 5 Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR> 6 (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR> 7 This program and the accompanying materials are licensed and made available under 8 the terms and conditions of the BSD License that accompanies this distribution. 9 The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php. 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 #ifndef __DXE_SERVICES_LIB_H__ 18 #define __DXE_SERVICES_LIB_H__ 19 20 /** 21 Searches all the available firmware volumes and returns the first matching FFS section. 22 23 This function searches all the firmware volumes for FFS files with FV file type specified by FileType 24 The order that the firmware volumes is searched is not deterministic. For each available FV a search 25 is made for FFS file of type FileType. If the FV contains more than one FFS file with the same FileType, 26 the FileInstance instance will be the matched FFS file. For each FFS file found a search 27 is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances 28 of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. 29 Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. 30 It is the caller's responsibility to use FreePool() to free the allocated buffer. 31 See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections 32 are retrieved from an FFS file based on SectionType and SectionInstance. 33 34 If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 35 the search will be retried with a section type of EFI_SECTION_PE32. 36 This function must be called with a TPL <= TPL_NOTIFY. 37 38 If Buffer is NULL, then ASSERT(). 39 If Size is NULL, then ASSERT(). 40 41 @param FileType Indicates the FV file type to search for within all available FVs. 42 @param FileInstance Indicates which file instance within all available FVs specified by FileType. 43 FileInstance starts from zero. 44 @param SectionType Indicates the FFS section type to search for within the FFS file 45 specified by FileType with FileInstance. 46 @param SectionInstance Indicates which section instance within the FFS file 47 specified by FileType with FileInstance to retrieve. SectionInstance starts from zero. 48 @param Buffer On output, a pointer to a callee allocated buffer containing the FFS file section that was found. 49 Is it the caller's responsibility to free this buffer using FreePool(). 50 @param Size On output, a pointer to the size, in bytes, of Buffer. 51 52 @retval EFI_SUCCESS The specified FFS section was returned. 53 @retval EFI_NOT_FOUND The specified FFS section could not be found. 54 @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve the matching FFS section. 55 @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a device error. 56 @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the firmware volume that 57 contains the matching FFS section does not allow reads. 58 **/ 59 EFI_STATUS 60 EFIAPI 61 GetSectionFromAnyFvByFileType ( 62 IN EFI_FV_FILETYPE FileType, 63 IN UINTN FileInstance, 64 IN EFI_SECTION_TYPE SectionType, 65 IN UINTN SectionInstance, 66 OUT VOID **Buffer, 67 OUT UINTN *Size 68 ); 69 70 /** 71 Searches all the available firmware volumes and returns the first matching FFS section. 72 73 This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid. 74 The order in which the firmware volumes are searched is not deterministic. For each FFS file found, a search 75 is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances 76 of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. 77 Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. 78 It is the caller's responsibility to use FreePool() to free the allocated buffer. 79 See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections 80 are retrieved from an FFS file based on SectionType and SectionInstance. 81 82 If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 83 the search will be retried with a section type of EFI_SECTION_PE32. 84 This function must be called with a TPL <= TPL_NOTIFY. 85 86 If NameGuid is NULL, then ASSERT(). 87 If Buffer is NULL, then ASSERT(). 88 If Size is NULL, then ASSERT(). 89 90 91 @param NameGuid A pointer to to the FFS filename GUID to search for 92 within any of the firmware volumes in the platform. 93 @param SectionType Indicates the FFS section type to search for within 94 the FFS file specified by NameGuid. 95 @param SectionInstance Indicates which section instance within the FFS file 96 specified by NameGuid to retrieve. 97 @param Buffer On output, a pointer to a callee-allocated buffer 98 containing the FFS file section that was found. 99 It is the caller's responsibility to free this 100 buffer using FreePool(). 101 @param Size On output, a pointer to the size, in bytes, of Buffer. 102 103 @retval EFI_SUCCESS The specified FFS section was returned. 104 @retval EFI_NOT_FOUND The specified FFS section could not be found. 105 @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve 106 the matching FFS section. 107 @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a 108 device error. 109 @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the 110 firmware volume that contains the matching FFS 111 section does not allow reads. 112 **/ 113 EFI_STATUS 114 EFIAPI 115 GetSectionFromAnyFv ( 116 IN CONST EFI_GUID *NameGuid, 117 IN EFI_SECTION_TYPE SectionType, 118 IN UINTN SectionInstance, 119 OUT VOID **Buffer, 120 OUT UINTN *Size 121 ); 122 123 /** 124 Searches the firmware volume that the currently executing module was loaded from and returns the first matching FFS section. 125 126 This function searches the firmware volume that the currently executing module was loaded 127 from for an FFS file with an FFS filename specified by NameGuid. If the FFS file is found, a search 128 is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance 129 instances of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. 130 Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. 131 It is the caller's responsibility to use FreePool() to free the allocated buffer. 132 See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections are retrieved from 133 an FFS file based on SectionType and SectionInstance. 134 135 If the currently executing module was not loaded from a firmware volume, then EFI_NOT_FOUND is returned. 136 If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 137 the search will be retried with a section type of EFI_SECTION_PE32. 138 139 This function must be called with a TPL <= TPL_NOTIFY. 140 If NameGuid is NULL, then ASSERT(). 141 If Buffer is NULL, then ASSERT(). 142 If Size is NULL, then ASSERT(). 143 144 @param NameGuid A pointer to to the FFS filename GUID to search for 145 within the firmware volumes that the currently 146 executing module was loaded from. 147 @param SectionType Indicates the FFS section type to search for within 148 the FFS file specified by NameGuid. 149 @param SectionInstance Indicates which section instance within the FFS 150 file specified by NameGuid to retrieve. 151 @param Buffer On output, a pointer to a callee allocated buffer 152 containing the FFS file section that was found. 153 It is the caller's responsibility to free this buffer 154 using FreePool(). 155 @param Size On output, a pointer to the size, in bytes, of Buffer. 156 157 158 @retval EFI_SUCCESS The specified FFS section was returned. 159 @retval EFI_NOT_FOUND The specified FFS section could not be found. 160 @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve 161 the matching FFS section. 162 @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a 163 device error. 164 @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the 165 firmware volume that contains the matching FFS 166 section does not allow reads. 167 **/ 168 EFI_STATUS 169 EFIAPI 170 GetSectionFromFv ( 171 IN CONST EFI_GUID *NameGuid, 172 IN EFI_SECTION_TYPE SectionType, 173 IN UINTN SectionInstance, 174 OUT VOID **Buffer, 175 OUT UINTN *Size 176 ); 177 178 179 /** 180 Searches the FFS file the the currently executing module was loaded from and returns the first matching FFS section. 181 182 This function searches the FFS file that the currently executing module was loaded from for a FFS sections of type SectionType. 183 If the FFS file contains at least SectionInstance instances of the FFS section specified by SectionType, 184 then the SectionInstance instance is returned in Buffer. Buffer is allocated using AllocatePool(), 185 and the size of the allocated buffer is returned in Size. It is the caller's responsibility 186 to use FreePool() to free the allocated buffer. See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for 187 details on how sections are retrieved from an FFS file based on SectionType and SectionInstance. 188 189 If the currently executing module was not loaded from an FFS file, then EFI_NOT_FOUND is returned. 190 If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 191 the search will be retried with a section type of EFI_SECTION_PE32. 192 This function must be called with a TPL <= TPL_NOTIFY. 193 194 If Buffer is NULL, then ASSERT(). 195 If Size is NULL, then ASSERT(). 196 197 198 @param SectionType Indicates the FFS section type to search for within 199 the FFS file that the currently executing module 200 was loaded from. 201 @param SectionInstance Indicates which section instance to retrieve within 202 the FFS file that the currently executing module 203 was loaded from. 204 @param Buffer On output, a pointer to a callee allocated buffer 205 containing the FFS file section that was found. 206 It is the caller's responsibility to free this buffer 207 using FreePool(). 208 @param Size On output, a pointer to the size, in bytes, of Buffer. 209 210 @retval EFI_SUCCESS The specified FFS section was returned. 211 @retval EFI_NOT_FOUND The specified FFS section could not be found. 212 @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve 213 the matching FFS section. 214 @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a 215 device error. 216 @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the 217 firmware volume that contains the matching FFS 218 section does not allow reads. 219 220 **/ 221 EFI_STATUS 222 EFIAPI 223 GetSectionFromFfs ( 224 IN EFI_SECTION_TYPE SectionType, 225 IN UINTN SectionInstance, 226 OUT VOID **Buffer, 227 OUT UINTN *Size 228 ); 229 230 231 /** 232 Get the image file buffer data and buffer size by its device path. 233 234 Access the file either from a firmware volume, from a file system interface, 235 or from the load file interface. 236 237 Allocate memory to store the found image. The caller is responsible to free memory. 238 239 If FilePath is NULL, then NULL is returned. 240 If FileSize is NULL, then NULL is returned. 241 If AuthenticationStatus is NULL, then NULL is returned. 242 243 @param[in] BootPolicy The policy for Open Image File.If TRUE, 244 indicates that the request originates from 245 the boot manager, and that the boot manager is 246 attempting to load FilePath as a boot selection. 247 If FALSE, then FilePath must match an exact 248 file to be loaded. 249 @param[in] FilePath Pointer to the device path of the file that is abstracted to 250 the file buffer. 251 @param[out] FileSize Pointer to the size of the abstracted file buffer. 252 @param[out] AuthenticationStatus Pointer to the authentication status. 253 254 @retval NULL FilePath is NULL, or FileSize is NULL, or AuthenticationStatus is NULL, or the file can't be found. 255 @retval other The abstracted file buffer. The caller is responsible to free memory. 256 **/ 257 VOID * 258 EFIAPI 259 GetFileBufferByFilePath ( 260 IN BOOLEAN BootPolicy, 261 IN CONST EFI_DEVICE_PATH_PROTOCOL *FilePath, 262 OUT UINTN *FileSize, 263 OUT UINT32 *AuthenticationStatus 264 ); 265 266 /** 267 Searches all the available firmware volumes and returns the file device path of first matching 268 FFS section. 269 270 This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid. 271 The order that the firmware volumes is searched is not deterministic. For each FFS file found a search 272 is made for FFS sections of type SectionType. 273 274 If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 275 the search will be retried with a section type of EFI_SECTION_PE32. 276 This function must be called with a TPL <= TPL_NOTIFY. 277 278 If NameGuid is NULL, then ASSERT(). 279 280 @param NameGuid A pointer to to the FFS filename GUID to search for 281 within any of the firmware volumes in the platform. 282 @param SectionType Indicates the FFS section type to search for within 283 the FFS file specified by NameGuid. 284 @param SectionInstance Indicates which section instance within the FFS file 285 specified by NameGuid to retrieve. 286 @param FvFileDevicePath Device path for the target FFS 287 file. 288 289 @retval EFI_SUCCESS The specified file device path of FFS section was returned. 290 @retval EFI_NOT_FOUND The specified file device path of FFS section could not be found. 291 @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a 292 device error. 293 @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the 294 firmware volume that contains the matching FFS section does not 295 allow reads. 296 @retval EFI_INVALID_PARAMETER FvFileDevicePath is NULL. 297 298 **/ 299 EFI_STATUS 300 EFIAPI 301 GetFileDevicePathFromAnyFv ( 302 IN CONST EFI_GUID *NameGuid, 303 IN EFI_SECTION_TYPE SectionType, 304 IN UINTN SectionInstance, 305 OUT EFI_DEVICE_PATH_PROTOCOL **FvFileDevicePath 306 ); 307 308 #endif 309 310
