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adbcbf8f | 1 | /** @file\r |
2 | Decode an El Torito formatted CD-ROM\r | |
3 | \r | |
3a3d62d2 | 4 | Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r |
e5eed7d3 | 5 | This program and the accompanying materials\r |
f42be642 | 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 | |
adbcbf8f | 12 | \r |
13 | **/\r | |
14 | \r | |
15 | \r | |
16 | #include "Partition.h"\r | |
17 | \r | |
18 | \r | |
19 | /**\r | |
20 | Install child handles if the Handle supports El Torito format.\r | |
21 | \r | |
22 | @param[in] This Calling context.\r | |
490b5ea1 | 23 | @param[in] Handle Parent Handle.\r |
24 | @param[in] DiskIo Parent DiskIo interface.\r | |
493d8e3a | 25 | @param[in] DiskIo2 Parent DiskIo2 interface.\r |
490b5ea1 | 26 | @param[in] BlockIo Parent BlockIo interface.\r |
27 | @param[in] BlockIo2 Parent BlockIo2 interface.\r | |
adbcbf8f | 28 | @param[in] DevicePath Parent Device Path\r |
29 | \r | |
30 | \r | |
490b5ea1 | 31 | @retval EFI_SUCCESS Child handle(s) was added.\r |
32 | @retval EFI_MEDIA_CHANGED Media changed Detected.\r | |
33 | @retval other no child handle was added.\r | |
adbcbf8f | 34 | \r |
35 | **/\r | |
36 | EFI_STATUS\r | |
37 | PartitionInstallElToritoChildHandles (\r | |
38 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
39 | IN EFI_HANDLE Handle,\r | |
40 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
493d8e3a | 41 | IN EFI_DISK_IO2_PROTOCOL *DiskIo2,\r |
adbcbf8f | 42 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
490b5ea1 | 43 | IN EFI_BLOCK_IO2_PROTOCOL *BlockIo2,\r |
adbcbf8f | 44 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r |
45 | )\r | |
46 | {\r | |
3a3d62d2 HW |
47 | EFI_STATUS Status;\r |
48 | UINT64 VolDescriptorOffset;\r | |
49 | UINT32 Lba2KB;\r | |
50 | EFI_BLOCK_IO_MEDIA *Media;\r | |
51 | CDROM_VOLUME_DESCRIPTOR *VolDescriptor;\r | |
52 | ELTORITO_CATALOG *Catalog;\r | |
53 | UINTN Check;\r | |
54 | UINTN Index;\r | |
55 | UINTN BootEntry;\r | |
56 | UINTN MaxIndex;\r | |
57 | UINT16 *CheckBuffer;\r | |
58 | CDROM_DEVICE_PATH CdDev;\r | |
59 | UINT32 SubBlockSize;\r | |
60 | UINT32 SectorCount;\r | |
61 | EFI_STATUS Found;\r | |
62 | UINT32 VolSpaceSize;\r | |
63 | EFI_PARTITION_INFO_PROTOCOL PartitionInfo;\r | |
adbcbf8f | 64 | \r |
65 | Found = EFI_NOT_FOUND;\r | |
66 | Media = BlockIo->Media;\r | |
490b5ea1 | 67 | \r |
adbcbf8f | 68 | VolSpaceSize = 0;\r |
69 | \r | |
70 | //\r | |
5d6bf9e2 | 71 | // CD_ROM has the fixed block size as 2048 bytes (SIZE_2KB)\r |
adbcbf8f | 72 | //\r |
5d6bf9e2 OM |
73 | \r |
74 | // If the ISO image has been copied onto a different storage media\r | |
75 | // then the block size might be different (eg: USB).\r | |
76 | // Ensure 2048 (SIZE_2KB) is a multiple of block size\r | |
77 | if (((SIZE_2KB % Media->BlockSize) != 0) || (Media->BlockSize > SIZE_2KB)) {\r | |
adbcbf8f | 78 | return EFI_NOT_FOUND;\r |
79 | }\r | |
80 | \r | |
5d6bf9e2 | 81 | VolDescriptor = AllocatePool ((UINTN)SIZE_2KB);\r |
adbcbf8f | 82 | \r |
83 | if (VolDescriptor == NULL) {\r | |
84 | return EFI_NOT_FOUND;\r | |
85 | }\r | |
86 | \r | |
87 | Catalog = (ELTORITO_CATALOG *) VolDescriptor;\r | |
88 | \r | |
adbcbf8f | 89 | //\r |
90 | // Loop: handle one volume descriptor per time\r | |
5d6bf9e2 | 91 | // The ISO-9660 volume descriptor starts at 32k on the media\r |
adbcbf8f | 92 | //\r |
5d6bf9e2 OM |
93 | for (VolDescriptorOffset = SIZE_32KB;\r |
94 | VolDescriptorOffset <= MultU64x32 (Media->LastBlock, Media->BlockSize);\r | |
95 | VolDescriptorOffset += SIZE_2KB) {\r | |
96f99e1d | 96 | Status = DiskIo->ReadDisk (\r |
97 | DiskIo,\r | |
98 | Media->MediaId,\r | |
5d6bf9e2 OM |
99 | VolDescriptorOffset,\r |
100 | SIZE_2KB,\r | |
96f99e1d | 101 | VolDescriptor\r |
102 | );\r | |
adbcbf8f | 103 | if (EFI_ERROR (Status)) {\r |
104 | Found = Status;\r | |
105 | break;\r | |
106 | }\r | |
107 | //\r | |
108 | // Check for valid volume descriptor signature\r | |
109 | //\r | |
88a19367 | 110 | if (VolDescriptor->Unknown.Type == CDVOL_TYPE_END ||\r |
111 | CompareMem (VolDescriptor->Unknown.Id, CDVOL_ID, sizeof (VolDescriptor->Unknown.Id)) != 0\r | |
adbcbf8f | 112 | ) {\r |
113 | //\r | |
114 | // end of Volume descriptor list\r | |
115 | //\r | |
116 | break;\r | |
117 | }\r | |
118 | //\r | |
119 | // Read the Volume Space Size from Primary Volume Descriptor 81-88 byte,\r | |
120 | // the 32-bit numerical values is stored in Both-byte orders\r | |
121 | //\r | |
88a19367 | 122 | if (VolDescriptor->PrimaryVolume.Type == CDVOL_TYPE_CODED) {\r |
123 | VolSpaceSize = VolDescriptor->PrimaryVolume.VolSpaceSize[0];\r | |
adbcbf8f | 124 | }\r |
125 | //\r | |
126 | // Is it an El Torito volume descriptor?\r | |
127 | //\r | |
88a19367 | 128 | if (CompareMem (VolDescriptor->BootRecordVolume.SystemId, CDVOL_ELTORITO_ID, sizeof (CDVOL_ELTORITO_ID) - 1) != 0) {\r |
adbcbf8f | 129 | continue;\r |
130 | }\r | |
131 | //\r | |
132 | // Read in the boot El Torito boot catalog\r | |
5d6bf9e2 | 133 | // The LBA unit used by El Torito boot catalog is 2KB unit\r |
adbcbf8f | 134 | //\r |
5d6bf9e2 OM |
135 | Lba2KB = UNPACK_INT32 (VolDescriptor->BootRecordVolume.EltCatalog);\r |
136 | // Ensure the LBA (in 2KB unit) fits into our media\r | |
137 | if (Lba2KB * (SIZE_2KB / Media->BlockSize) > Media->LastBlock) {\r | |
adbcbf8f | 138 | continue;\r |
139 | }\r | |
140 | \r | |
96f99e1d | 141 | Status = DiskIo->ReadDisk (\r |
142 | DiskIo,\r | |
143 | Media->MediaId,\r | |
5d6bf9e2 OM |
144 | MultU64x32 (Lba2KB, SIZE_2KB),\r |
145 | SIZE_2KB,\r | |
96f99e1d | 146 | Catalog\r |
147 | );\r | |
adbcbf8f | 148 | if (EFI_ERROR (Status)) {\r |
149 | DEBUG ((EFI_D_ERROR, "EltCheckDevice: error reading catalog %r\n", Status));\r | |
150 | continue;\r | |
151 | }\r | |
152 | //\r | |
153 | // We don't care too much about the Catalog header's contents, but we do want\r | |
154 | // to make sure it looks like a Catalog header\r | |
155 | //\r | |
156 | if (Catalog->Catalog.Indicator != ELTORITO_ID_CATALOG || Catalog->Catalog.Id55AA != 0xAA55) {\r | |
157 | DEBUG ((EFI_D_ERROR, "EltCheckBootCatalog: El Torito boot catalog header IDs not correct\n"));\r | |
158 | continue;\r | |
159 | }\r | |
160 | \r | |
161 | Check = 0;\r | |
162 | CheckBuffer = (UINT16 *) Catalog;\r | |
163 | for (Index = 0; Index < sizeof (ELTORITO_CATALOG) / sizeof (UINT16); Index += 1) {\r | |
164 | Check += CheckBuffer[Index];\r | |
165 | }\r | |
166 | \r | |
ea7cb08c | 167 | if ((Check & 0xFFFF) != 0) {\r |
adbcbf8f | 168 | DEBUG ((EFI_D_ERROR, "EltCheckBootCatalog: El Torito boot catalog header checksum failed\n"));\r |
169 | continue;\r | |
170 | }\r | |
171 | \r | |
172 | MaxIndex = Media->BlockSize / sizeof (ELTORITO_CATALOG);\r | |
173 | for (Index = 1, BootEntry = 1; Index < MaxIndex; Index += 1) {\r | |
174 | //\r | |
175 | // Next entry\r | |
176 | //\r | |
177 | Catalog += 1;\r | |
178 | \r | |
179 | //\r | |
180 | // Check this entry\r | |
181 | //\r | |
182 | if (Catalog->Boot.Indicator != ELTORITO_ID_SECTION_BOOTABLE || Catalog->Boot.Lba == 0) {\r | |
183 | continue;\r | |
184 | }\r | |
185 | \r | |
186 | SubBlockSize = 512;\r | |
744c7168 | 187 | SectorCount = Catalog->Boot.SectorCount;\r |
adbcbf8f | 188 | \r |
189 | switch (Catalog->Boot.MediaType) {\r | |
190 | \r | |
191 | case ELTORITO_NO_EMULATION:\r | |
192 | SubBlockSize = Media->BlockSize;\r | |
193 | break;\r | |
194 | \r | |
195 | case ELTORITO_HARD_DISK:\r | |
196 | break;\r | |
197 | \r | |
198 | case ELTORITO_12_DISKETTE:\r | |
199 | SectorCount = 0x50 * 0x02 * 0x0F;\r | |
200 | break;\r | |
201 | \r | |
202 | case ELTORITO_14_DISKETTE:\r | |
203 | SectorCount = 0x50 * 0x02 * 0x12;\r | |
204 | break;\r | |
205 | \r | |
206 | case ELTORITO_28_DISKETTE:\r | |
207 | SectorCount = 0x50 * 0x02 * 0x24;\r | |
208 | break;\r | |
209 | \r | |
210 | default:\r | |
211 | DEBUG ((EFI_D_INIT, "EltCheckDevice: unsupported El Torito boot media type %x\n", Catalog->Boot.MediaType));\r | |
212 | SectorCount = 0;\r | |
213 | SubBlockSize = Media->BlockSize;\r | |
214 | break;\r | |
215 | }\r | |
216 | //\r | |
217 | // Create child device handle\r | |
218 | //\r | |
219 | CdDev.Header.Type = MEDIA_DEVICE_PATH;\r | |
220 | CdDev.Header.SubType = MEDIA_CDROM_DP;\r | |
221 | SetDevicePathNodeLength (&CdDev.Header, sizeof (CdDev));\r | |
222 | \r | |
223 | if (Index == 1) {\r | |
224 | //\r | |
225 | // This is the initial/default entry\r | |
226 | //\r | |
227 | BootEntry = 0;\r | |
228 | }\r | |
229 | \r | |
230 | CdDev.BootEntry = (UINT32) BootEntry;\r | |
231 | BootEntry++;\r | |
5d6bf9e2 | 232 | CdDev.PartitionStart = Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize);\r |
adbcbf8f | 233 | if (SectorCount < 2) {\r |
234 | //\r | |
235 | // When the SectorCount < 2, set the Partition as the whole CD.\r | |
236 | //\r | |
744c7168 HW |
237 | if (VolSpaceSize * (SIZE_2KB / Media->BlockSize) > (Media->LastBlock + 1)) {\r |
238 | CdDev.PartitionSize = (UINT32)(Media->LastBlock - Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize) + 1);\r | |
adbcbf8f | 239 | } else {\r |
744c7168 | 240 | CdDev.PartitionSize = (UINT32)(VolSpaceSize - Catalog->Boot.Lba) * (SIZE_2KB / Media->BlockSize);\r |
adbcbf8f | 241 | }\r |
242 | } else {\r | |
243 | CdDev.PartitionSize = DivU64x32 (\r | |
244 | MultU64x32 (\r | |
744c7168 | 245 | SectorCount * (SIZE_2KB / Media->BlockSize),\r |
adbcbf8f | 246 | SubBlockSize\r |
247 | ) + Media->BlockSize - 1,\r | |
248 | Media->BlockSize\r | |
249 | );\r | |
250 | }\r | |
251 | \r | |
3a3d62d2 HW |
252 | ZeroMem (&PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));\r |
253 | PartitionInfo.Revision = EFI_PARTITION_INFO_PROTOCOL_REVISION;\r | |
254 | PartitionInfo.Type = PARTITION_TYPE_OTHER;\r | |
255 | \r | |
adbcbf8f | 256 | Status = PartitionInstallChildHandle (\r |
257 | This,\r | |
258 | Handle,\r | |
259 | DiskIo,\r | |
493d8e3a | 260 | DiskIo2,\r |
adbcbf8f | 261 | BlockIo,\r |
490b5ea1 | 262 | BlockIo2,\r |
adbcbf8f | 263 | DevicePath,\r |
264 | (EFI_DEVICE_PATH_PROTOCOL *) &CdDev,\r | |
3a3d62d2 | 265 | &PartitionInfo,\r |
5d6bf9e2 | 266 | Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize),\r |
744c7168 | 267 | Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize) + CdDev.PartitionSize - 1,\r |
3a3d62d2 | 268 | SubBlockSize\r |
adbcbf8f | 269 | );\r |
270 | if (!EFI_ERROR (Status)) {\r | |
271 | Found = EFI_SUCCESS;\r | |
272 | }\r | |
273 | }\r | |
274 | }\r | |
275 | \r | |
276 | FreePool (VolDescriptor);\r | |
277 | \r | |
278 | return Found;\r | |
279 | }\r |