bootable/bootloader/lk/app/aboot/bootimg.h

#ifndef _BOOT_IMAGE_H_

#define _BOOT_IMAGE_H_

typedef struct boot_img_hdr boot_img_hdr;

#define BOOT_MAGIC "ANDROID!"

#define BOOT_MAGIC_SIZE 8

#define BOOT_NAME_SIZE  16

#define BOOT_ARGS_SIZE  512

#define BOOT_IMG_MAX_PAGE_SIZE 4096

struct boot_img_hdr

{

    unsigned char magic[BOOT_MAGIC_SIZE];

    unsigned kernel_size;  /* size in bytes */

    unsigned kernel_addr;  /* physical load addr */

    unsigned ramdisk_size; /* size in bytes */

    unsigned ramdisk_addr; /* physical load addr */

    unsigned second_size;  /* size in bytes */

    unsigned second_addr;  /* physical load addr */

    unsigned tags_addr;    /* physical addr for kernel tags */

    unsigned page_size;    /* flash page size we assume */

    unsigned dt_size;      /* device_tree in bytes */

    unsigned unused;    /* future expansion: should be 0 */

    unsigned char name[BOOT_NAME_SIZE]; /* asciiz product name */

    unsigned char cmdline[BOOT_ARGS_SIZE];

    unsigned id[]; /* timestamp / checksum / sha1 / etc */

};

/*

** +-----------------+

** | boot header     | 1 page

** +-----------------+

** | kernel          | n pages

** +-----------------+

** | ramdisk         | m pages

** +-----------------+

** | second stage    | o pages

** +-----------------+

** | device tree     | p 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

** p = (dt_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

*/

boot_img_hdr *mkbootimg(void *kernel, unsigned kernel_size,

                        void *ramdisk, unsigned ramdisk_size,

                        void *second, unsigned second_size,

                        unsigned page_size,

                        unsigned *bootimg_size);

void bootimg_set_cmdline(boot_img_hdr *hdr, const char *cmdline);                

#define KERNEL64_HDR_MAGIC 0x644D5241 /* ARM64 */

struct kernel64_hdr

{

    uint32_t insn;

    uint32_t res1;

    uint64_t text_offset;

    uint64_t res2;

    uint64_t res3;

    uint64_t res4;

    uint64_t res5;

    uint64_t res6;

    uint32_t magic_64;

    uint32_t res7;

};

#endif