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111 lines
3.4 KiB
111 lines
3.4 KiB
/* tools/mkbootimg/bootimg.h |
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** |
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** Copyright 2007, The Android Open Source Project |
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** |
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** Licensed under the Apache License, Version 2.0 (the "License"); |
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** you may not use this file except in compliance with the License. |
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** You may obtain a copy of the License at |
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** |
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** http://www.apache.org/licenses/LICENSE-2.0 |
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** |
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** Unless required by applicable law or agreed to in writing, software |
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** distributed under the License is distributed on an "AS IS" BASIS, |
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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** See the License for the specific language governing permissions and |
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** limitations under the License. |
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*/ |
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#include <stdint.h> |
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#ifndef _BOOT_IMAGE_H_ |
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#define _BOOT_IMAGE_H_ |
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typedef struct boot_img_hdr boot_img_hdr; |
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#define BOOT_MAGIC "ANDROID!" |
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#define BOOT_MAGIC_SIZE 8 |
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#define BOOT_NAME_SIZE 16 |
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#define BOOT_ARGS_SIZE 512 |
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#define BOOT_EXTRA_ARGS_SIZE 1024 |
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struct boot_img_hdr |
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{ |
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uint8_t magic[BOOT_MAGIC_SIZE]; |
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uint32_t kernel_size; /* size in bytes */ |
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uint32_t kernel_addr; /* physical load addr */ |
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uint32_t ramdisk_size; /* size in bytes */ |
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uint32_t ramdisk_addr; /* physical load addr */ |
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uint32_t second_size; /* size in bytes */ |
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uint32_t second_addr; /* physical load addr */ |
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uint32_t tags_addr; /* physical addr for kernel tags */ |
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uint32_t page_size; /* flash page size we assume */ |
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uint32_t unused; /* reserved for future expansion: MUST be 0 */ |
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/* operating system version and security patch level; for |
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* version "A.B.C" and patch level "Y-M-D": |
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* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C) |
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* lvl = ((Y - 2000) & 127) << 4 | M (7 bits for Y, 4 bits for M) |
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* os_version = ver << 11 | lvl */ |
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uint32_t os_version; |
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uint8_t name[BOOT_NAME_SIZE]; /* asciiz product name */ |
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uint8_t cmdline[BOOT_ARGS_SIZE]; |
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uint32_t id[8]; /* timestamp / checksum / sha1 / etc */ |
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/* Supplemental command line data; kept here to maintain |
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* binary compatibility with older versions of mkbootimg */ |
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uint8_t extra_cmdline[BOOT_EXTRA_ARGS_SIZE]; |
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} __attribute__((packed)); |
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/* |
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** +-----------------+ |
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** | boot header | 1 page |
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** +-----------------+ |
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** | kernel | n pages |
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** +-----------------+ |
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** | ramdisk | m pages |
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** +-----------------+ |
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** | second stage | o pages |
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** +-----------------+ |
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** |
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** n = (kernel_size + page_size - 1) / page_size |
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** m = (ramdisk_size + page_size - 1) / page_size |
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** o = (second_size + page_size - 1) / page_size |
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** |
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** 0. all entities are page_size aligned in flash |
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** 1. kernel and ramdisk are required (size != 0) |
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** 2. second is optional (second_size == 0 -> no second) |
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** 3. load each element (kernel, ramdisk, second) at |
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** the specified physical address (kernel_addr, etc) |
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** 4. prepare tags at tag_addr. kernel_args[] is |
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** appended to the kernel commandline in the tags. |
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** 5. r0 = 0, r1 = MACHINE_TYPE, r2 = tags_addr |
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** 6. if second_size != 0: jump to second_addr |
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** else: jump to kernel_addr |
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*/ |
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#if 0 |
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typedef struct ptentry ptentry; |
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struct ptentry { |
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char name[16]; /* asciiz partition name */ |
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unsigned start; /* starting block number */ |
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unsigned length; /* length in blocks */ |
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unsigned flags; /* set to zero */ |
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}; |
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/* MSM Partition Table ATAG |
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** |
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** length: 2 + 7 * n |
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** atag: 0x4d534d70 |
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** <ptentry> x n |
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*/ |
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#endif |
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#endif
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