1 /*++ 2 3 Copyright (c) 2004, Intel Corporation. All rights reserved.<BR> 4 This program and the accompanying materials 5 are licensed and made available under the terms and conditions of the BSD License 6 which accompanies this distribution. The full text of the license may be found at 7 http://opensource.org/licenses/bsd-license.php 8 9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 12 Module Name: 13 14 TianoDecompress.h 15 16 Abstract: 17 18 The Tiano Decompress Protocol Interface 19 20 --*/ 21 22 #ifndef _TIANO_DECOMPRESS_H_ 23 #define _TIANO_DECOMPRESS_H_ 24 25 #define EFI_TIANO_DECOMPRESS_PROTOCOL_GUID \ 26 { 0xe84cf29c, 0x191f, 0x4eae, {0x96, 0xe1, 0xf4, 0x6a, 0xec, 0xea, 0xea, 0x0b} } 27 28 EFI_FORWARD_DECLARATION (EFI_TIANO_DECOMPRESS_PROTOCOL); 29 30 typedef 31 EFI_STATUS 32 (EFIAPI *EFI_TIANO_DECOMPRESS_GET_INFO) ( 33 IN EFI_TIANO_DECOMPRESS_PROTOCOL *This, 34 IN VOID *Source, 35 IN UINT32 SourceSize, 36 OUT UINT32 *DestinationSize, 37 OUT UINT32 *ScratchSize 38 ); 39 /*++ 40 41 Routine Description: 42 43 The GetInfo() function retrieves the size of the uncompressed buffer 44 and the temporary scratch buffer required to decompress the buffer 45 specified by Source and SourceSize. If the size of the uncompressed 46 buffer or the size of the scratch buffer cannot be determined from 47 the compressed data specified by Source and SourceData, then 48 EFI_INVALID_PARAMETER is returned. Otherwise, the size of the uncompressed 49 buffer is returned in DestinationSize, the size of the scratch buffer is 50 returned in ScratchSize, and EFI_SUCCESS is returned. 51 52 The GetInfo() function does not have scratch buffer available to perform 53 a thorough checking of the validity of the source data. It just retrieves 54 the 'Original Size' field from the beginning bytes of the source data and 55 output it as DestinationSize. And ScratchSize is specific to the decompression 56 implementation. 57 58 Arguments: 59 60 This - The protocol instance pointer 61 Source - The source buffer containing the compressed data. 62 SourceSize - The size, in bytes, of source buffer. 63 DestinationSize - A pointer to the size, in bytes, of the uncompressed buffer 64 that will be generated when the compressed buffer specified 65 by Source and SourceSize is decompressed. 66 ScratchSize - A pointer to the size, in bytes, of the scratch buffer that 67 is required to decompress the compressed buffer specified by 68 Source and SourceSize. 69 70 Returns: 71 EFI_SUCCESS - The size of the uncompressed data was returned in DestinationSize 72 and the size of the scratch buffer was returned in ScratchSize. 73 EFI_INVALID_PARAMETER - The size of the uncompressed data or the size of the scratch 74 buffer cannot be determined from the compressed data specified by 75 Source and SourceData. 76 77 --*/ 78 79 80 typedef 81 EFI_STATUS 82 (EFIAPI *EFI_TIANO_DECOMPRESS_DECOMPRESS) ( 83 IN EFI_TIANO_DECOMPRESS_PROTOCOL *This, 84 IN VOID* Source, 85 IN UINT32 SourceSize, 86 IN OUT VOID* Destination, 87 IN UINT32 DestinationSize, 88 IN OUT VOID* Scratch, 89 IN UINT32 ScratchSize 90 ); 91 /*++ 92 93 Routine Description: 94 95 The Decompress() function extracts decompressed data to its original form. 96 97 This protocol is designed so that the decompression algorithm can be 98 implemented without using any memory services. As a result, the 99 Decompress() function is not allowed to call AllocatePool() or 100 AllocatePages() in its implementation. It is the caller's responsibility 101 to allocate and free the Destination and Scratch buffers. 102 103 If the compressed source data specified by Source and SourceSize is 104 sucessfully decompressed into Destination, then EFI_SUCCESS is returned. 105 If the compressed source data specified by Source and SourceSize is not in 106 a valid compressed data format, then EFI_INVALID_PARAMETER is returned. 107 108 Arguments: 109 110 This - The protocol instance pointer 111 Source - The source buffer containing the compressed data. 112 SourceSize - The size of source data. 113 Destination - On output, the destination buffer that contains 114 the uncompressed data. 115 DestinationSize - The size of destination buffer. The size of destination 116 buffer needed is obtained from GetInfo(). 117 Scratch - A temporary scratch buffer that is used to perform the 118 decompression. 119 ScratchSize - The size of scratch buffer. The size of scratch buffer needed 120 is obtained from GetInfo(). 121 122 Returns: 123 124 EFI_SUCCESS - Decompression completed successfully, and the uncompressed 125 buffer is returned in Destination. 126 EFI_INVALID_PARAMETER 127 - The source buffer specified by Source and SourceSize is 128 corrupted (not in a valid compressed format). 129 130 --*/ 131 132 struct _EFI_TIANO_DECOMPRESS_PROTOCOL { 133 EFI_TIANO_DECOMPRESS_GET_INFO GetInfo; 134 EFI_TIANO_DECOMPRESS_DECOMPRESS Decompress; 135 }; 136 137 extern EFI_GUID gEfiTianoDecompressProtocolGuid; 138 139 #endif 140