75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/*
|
|
* (C) Copyright 2011 Jean-Christhophe PLAGNIOL-VILLARD <plagniol@jcrosoft.com>
|
|
*
|
|
* Android boot image
|
|
*
|
|
* Under GPLv2 only
|
|
*/
|
|
|
|
#ifndef __AIMAGE_H__
|
|
#define __AIMAGE_H__
|
|
|
|
#define BOOT_MAGIC "ANDROID!"
|
|
#define BOOT_MAGIC_SIZE 8
|
|
#define BOOT_NAME_SIZE 16
|
|
#define BOOT_ARGS_SIZE 512
|
|
|
|
struct android_header_comp
|
|
{
|
|
unsigned size;
|
|
unsigned load_addr;
|
|
};
|
|
|
|
struct android_header
|
|
{
|
|
u8 magic[BOOT_MAGIC_SIZE];
|
|
|
|
struct android_header_comp kernel;
|
|
|
|
struct android_header_comp ramdisk;
|
|
|
|
struct android_header_comp second_stage;
|
|
|
|
/* physical addr for kernel tags */
|
|
unsigned tags_addr;
|
|
/* flash page size we assume */
|
|
unsigned page_size;
|
|
/* future expansion: should be 0 */
|
|
unsigned unused[2];
|
|
|
|
unsigned char name[BOOT_NAME_SIZE]; /* asciiz product name */
|
|
|
|
unsigned char cmdline[BOOT_ARGS_SIZE];
|
|
|
|
unsigned id[8]; /* timestamp / checksum / sha1 / etc */
|
|
};
|
|
|
|
/*
|
|
* +-----------------+
|
|
* | boot header | 1 page
|
|
* +-----------------+
|
|
* | kernel | n pages
|
|
* +-----------------+
|
|
* | ramdisk | m pages
|
|
* +-----------------+
|
|
* | second stage | o pages
|
|
* +-----------------+
|
|
*
|
|
* n = (kernel_size + page_size - 1) / page_size
|
|
* m = (ramdisk_size + page_size - 1) / page_size
|
|
* o = (second_size + page_size - 1) / page_size
|
|
*
|
|
* 0. all entities are page_size aligned in flash
|
|
* 1. kernel and ramdisk are required (size != 0)
|
|
* 2. second is optional (second_size == 0 -> no second)
|
|
* 3. load each element (kernel, ramdisk, second) at
|
|
* the specified physical address (kernel_addr, etc)
|
|
* 4. prepare tags at tag_addr. kernel_args[] is
|
|
* appended to the kernel commandline in the tags.
|
|
* 5. r0 = 0, r1 = MACHINE_TYPE, r2 = tags_addr
|
|
* 6. if second_size != 0: jump to second_addr
|
|
* else: jump to kernel_addr
|
|
*/
|
|
|
|
#endif /* __AIMAGE_H__ */
|