101 lines
3.7 KiB
C
101 lines
3.7 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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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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struct boot_img_hdr
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{
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unsigned char magic[BOOT_MAGIC_SIZE];
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unsigned kernel_size; /* size in bytes */
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unsigned kernel_addr; /* physical load addr */
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unsigned ramdisk_size; /* size in bytes */
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unsigned ramdisk_addr; /* physical load addr */
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unsigned second_size; /* size in bytes */
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unsigned second_addr; /* physical load addr */
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unsigned tags_addr; /* physical addr for kernel tags */
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unsigned page_size; /* flash page size we assume */
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unsigned dt_size; /* device_tree in bytes */
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unsigned unused; /* future expansion: should be 0 */
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unsigned char name[BOOT_NAME_SIZE]; /* asciiz product name */
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unsigned char cmdline[BOOT_ARGS_SIZE];
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unsigned id[8]; /* timestamp / checksum / sha1 / etc */
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};
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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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** | device tree | p 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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** p = (dt_size + page_size - 1) / page_size
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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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boot_img_hdr *mkbootimg(void *kernel, unsigned kernel_size,
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void *ramdisk, unsigned ramdisk_size,
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void *second, unsigned second_size,
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unsigned page_size,
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unsigned *bootimg_size);
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void bootimg_set_cmdline(boot_img_hdr *hdr, const char *cmdline);
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#endif
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