83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* This is from the Android Project,
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* Repository: https://android.googlesource.com/platform/system/core/
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* File: mkbootimg/bootimg.h
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* Commit: d162828814b08ada310846a33205befb69ef5799
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*
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* Copyright (C) 2008 The Android Open Source Project
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*/
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#ifndef _ANDROID_IMAGE_H_
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#define _ANDROID_IMAGE_H_
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typedef struct andr_img_hdr andr_img_hdr;
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#define ANDR_BOOT_MAGIC "ANDROID!"
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#define ANDR_BOOT_MAGIC_SIZE 8
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#define ANDR_BOOT_NAME_SIZE 16
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#define ANDR_BOOT_ARGS_SIZE 512
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#define ANDR_BOOT_EXTRA_ARGS_SIZE 1024
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struct andr_img_hdr {
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char magic[ANDR_BOOT_MAGIC_SIZE];
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u32 kernel_size; /* size in bytes */
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u32 kernel_addr; /* physical load addr */
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u32 ramdisk_size; /* size in bytes */
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u32 ramdisk_addr; /* physical load addr */
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u32 second_size; /* size in bytes */
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u32 second_addr; /* physical load addr */
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u32 tags_addr; /* physical addr for kernel tags */
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u32 page_size; /* flash page size we assume */
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u32 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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u32 os_version;
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char name[ANDR_BOOT_NAME_SIZE]; /* asciiz product name */
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char cmdline[ANDR_BOOT_ARGS_SIZE];
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u32 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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char extra_cmdline[ANDR_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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#endif
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