| 1 | /** @file\r |
| 2 | \r |
| 3 | Copyright (c) 2013-2014, 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 "AndroidFastbootApp.h"\r |
| 16 | \r |
| 17 | #define BOOT_MAGIC "ANDROID!"\r |
| 18 | #define BOOT_MAGIC_LENGTH sizeof (BOOT_MAGIC) - 1\r |
| 19 | \r |
| 20 | // Check Val (unsigned) is a power of 2 (has only one bit set)\r |
| 21 | #define IS_POWER_OF_2(Val) (Val != 0 && ((Val & (Val - 1)) == 0))\r |
| 22 | \r |
| 23 | // No documentation for this really - sizes of fields has been determined\r |
| 24 | // empirically.\r |
| 25 | #pragma pack(1)\r |
| 26 | typedef struct {\r |
| 27 | CHAR8 BootMagic[BOOT_MAGIC_LENGTH];\r |
| 28 | UINT32 KernelSize;\r |
| 29 | UINT32 KernelAddress;\r |
| 30 | UINT32 RamdiskSize;\r |
| 31 | UINT32 RamdiskAddress;\r |
| 32 | UINT32 SecondStageBootloaderSize;\r |
| 33 | UINT32 SecondStageBootloaderAddress;\r |
| 34 | UINT32 KernelTaggsAddress;\r |
| 35 | UINT32 PageSize;\r |
| 36 | UINT32 Reserved[2];\r |
| 37 | CHAR8 ProductName[16];\r |
| 38 | CHAR8 KernelArgs[BOOTIMG_KERNEL_ARGS_SIZE];\r |
| 39 | UINT32 Id[32];\r |
| 40 | } ANDROID_BOOTIMG_HEADER;\r |
| 41 | #pragma pack()\r |
| 42 | \r |
| 43 | // Find the kernel and ramdisk in an Android boot.img.\r |
| 44 | // return EFI_INVALID_PARAMTER if the boot.img is invalid (i.e. doesn't have the\r |
| 45 | // right magic value),\r |
| 46 | // return EFI_NOT_FOUND if there was no kernel in the boot.img.\r |
| 47 | // Note that the Ramdisk is optional - *Ramdisk won't be touched if it isn't\r |
| 48 | // present, but RamdiskSize will be set to 0.\r |
| 49 | EFI_STATUS\r |
| 50 | ParseAndroidBootImg (\r |
| 51 | IN VOID *BootImg,\r |
| 52 | OUT VOID **Kernel,\r |
| 53 | OUT UINTN *KernelSize,\r |
| 54 | OUT VOID **Ramdisk,\r |
| 55 | OUT UINTN *RamdiskSize,\r |
| 56 | OUT CHAR8 *KernelArgs\r |
| 57 | )\r |
| 58 | {\r |
| 59 | ANDROID_BOOTIMG_HEADER *Header;\r |
| 60 | UINT8 *BootImgBytePtr;\r |
| 61 | \r |
| 62 | // Cast to UINT8 so we can do pointer arithmetic\r |
| 63 | BootImgBytePtr = (UINT8 *) BootImg;\r |
| 64 | \r |
| 65 | Header = (ANDROID_BOOTIMG_HEADER *) BootImg;\r |
| 66 | \r |
| 67 | if (AsciiStrnCmp (Header->BootMagic, BOOT_MAGIC, BOOT_MAGIC_LENGTH) != 0) {\r |
| 68 | return EFI_INVALID_PARAMETER;\r |
| 69 | }\r |
| 70 | \r |
| 71 | if (Header->KernelSize == 0) {\r |
| 72 | return EFI_NOT_FOUND;\r |
| 73 | }\r |
| 74 | \r |
| 75 | ASSERT (IS_POWER_OF_2 (Header->PageSize));\r |
| 76 | \r |
| 77 | *KernelSize = Header->KernelSize;\r |
| 78 | *Kernel = BootImgBytePtr + Header->PageSize;\r |
| 79 | *RamdiskSize = Header->RamdiskSize;\r |
| 80 | \r |
| 81 | if (Header->RamdiskSize != 0) {\r |
| 82 | *Ramdisk = (VOID *) (BootImgBytePtr\r |
| 83 | + Header->PageSize\r |
| 84 | + ALIGN_VALUE (Header->KernelSize, Header->PageSize));\r |
| 85 | }\r |
| 86 | \r |
| 87 | AsciiStrnCpyS (KernelArgs, BOOTIMG_KERNEL_ARGS_SIZE, Header->KernelArgs,\r |
| 88 | BOOTIMG_KERNEL_ARGS_SIZE);\r |
| 89 | \r |
| 90 | return EFI_SUCCESS;\r |
| 91 | }\r |