sunxi分区那些事儿

参考文档
①　使用buildroot完全自定义自己的embedded linux系统(nand)
②　Overlay Filesystem
③　How do I use OverlayFS?

---

分区表
分区表由文件sys_config.fex划分，填充内容由[downloadi]指定。而[downloadi]对应的
文件则由文件image.cfg定义。
- sys_config.fex

;---------------------------------------------------------------------------------------------------------
; 说明： 脚本中的字符串区分大小写，用户可以修改"="后面的数值，但是不要修改前面的字符串
;---------------------------------------------------------------------------------------------------------

[platform]
chip=0x02000000
pid =0x02000000
sid =0x02000100
bid =0x80

eraseflag   = 0
jtag        = 1


[fex_misc]
restore = 1
;--------------------------------------------------------------------------------------------------
; 固件下载参数配置
;--------------------------------------------------------------------------------------------------
;-----------------------------------------------------------------------------------------
; 分区配置管理
;-----------------------------------------------------------------------------------------
;****************************************************
;    mbr的大小, 以Kbyte为单位
;****************************************************
[mbr]
size = 1024

;********************************************************************************************************
;                                              分区配置
;  当前分区的个数，默认有rootfs和userfs0两个分区，最大分区个数为7个.
;
;  [part_num]
;      num     = 2              ; //有2个分区
;      part0   = partiton0      ; //part0的信息存放在partiton0里
;      parti   = partitoni      ; //parti的信息存放在partitoni里
;
;  partition 定义范例:
;    [partition2]                ;   //第2个分区
;    class_name  = DISK         ;   //设备类名, 如："DISK"。 可参考"..\ePDK\includes\emod\sys_dev.h"
;    name        = USERFS2      ;   //设备节点名.  可参考"..\ePDK\includes\emod\sys_dev.h"
;    size_hi     = 0            ;   //分区大小的高32位, 单位: Kbyte.
;    size_lo     = 32           ;   //分区大小的低32位, 单位: Kbyte.
;
; 注：1、name唯一, 不允许同名
;     2、最大分区号为6
;     3、class_name和name最大12个字符
;     4、size_hi + size_lo = 0, 表示此分区不存在 1048576
;********************************************************************************************************
[part_num]
num     = 4

[partition0]
    class_name  = DISK
    name        = bootloader
    size_hi     = 0
    size_lo     = 65536
    user_type   = 0
    ro          = 0

[partition1]
    class_name  = DISK
    name        = env
    size_hi     = 0
    size_lo     = 2048
    user_type   = 0
    ro          = 0

[partition2]
    class_name  = DISK
    name        = rootfs
    size_hi     = 0
    size_lo     = 475712
    user_type   = 0
    ro          = 0
[partition3]
    class_name  = DISK
    name        = rootfs2
    size_hi     = 0
    size_lo     = 475712
    user_type   = 0
    ro          = 0


;********************************************************************************************************************
;                     固件包下载位置 ： 把某个固件包下载到指定分区, 下载次数最大为7次
;
;[downloadi]                                //固件包0下载位置
;    part_name      = SYSDATAFS             //分区名
;    pkt_name       = ROOTFS_000000000      //固件包名称
;    verify_file    = VERIFY_000000000      //校验文件名称
;
; 注：1、 downloadi 表示第i次下载固件, download 唯一, 请不要随意修改
;    2、 part_num 为分区号, 即固件下载的位置
;    3、 pkt_name 固件包名称. 最大长度为16byte, 且名称固定. 可参考"..\\ePDK\workspace\suni\liveclick\image.cfg"
;    4、 verify_file 为校验文件名称. 可参考"..\\ePDK\workspace\suni\liveclick\image.cfg"
;    5、 pkt_name 内容不填, 表示本次下载取消.  verify_file内容不填, 表示不需要校验.
;
; 如：要把固件包zdisk.img, 下载在到SYSDATAFS分区里。其配置为：
; [download0]
;      part_name   = SYSDATAFS
;      pkt_name     = ROOTFS_000000000
;      verify_file  = VERIFY_000000000
;********************************************************************************************************************
[down_num]
down_num    = 4

[download0]
part_name   = bootloader
pkt_name    = BOOTLOADER_00000
encrypt     = 0

[download1]
part_name   = env
pkt_name    = ENVIROMENT_00000
encrypt     = 0

[download2]
part_name   = rootfs
pkt_name    = ROOTFS_000000000
encrypt     = 0

[download3]
part_name   = rootfs2
pkt_name    = ROOTFS_000000000
encrypt     = 0

• image.cfg

;/**************************************************************************/
;2010-06-09
;Sam
;image>配置文件内容
;/**************************************************************************/

;主要类型 8字节字符串
[MAIN_TYPE]
ITEM_COMMON         = "COMMON  "
ITEM_INFO           = "INFO    "
ITEM_BOOTROM        = "BOOTROM "
ITEM_FES            = "FES     "
ITEM_FET            = "FET     "
ITEM_FED            = "FED     "
ITEM_FEX            = "FEX     "
ITEM_BOOT           = "BOOT    "
ITEM_ROOTFSFAT12    = "RFSFAT12"
ITEM_ROOTFSFAT16    = "RFSFAT16"
ITEM_ROOTFSFAT32    = "FFSFAT32"
ITEM_USERFSFAT12    = "UFSFAT12"
ITEM_USERFSFAT16    = "UFSFAT16"
ITEM_USERFSFAT32    = "UFSFAT32"
ITEM_PHOENIX_SCRIPT = "PXSCRIPT"
ITEM_PHOENIX_TOOLS  = "PXTOOLS "
ITEM_AUDIO_DSP      = "AUDIODSP"
ITEM_VIDEO_DSP      = "VIDEODSP"
ITEM_FONT           = "FONT    "
ITEM_FLASH_DRV      = "FLASHDRV"
ITEM_OS_CORE        = "OS_CORE "
ITEM_DRIVER         = "DRIVER  "
ITEM_PIC            = "PICTURE "
ITEM_AUDIO          = "AUDIO   "
ITEM_VIDEO          = "VIDEO   "
ITEM_APPLICATION    = "APP     "

;子类型格式，供参考，可以另外定义，最大长度必须为16字节
[SUB_TYPE]
SUBTYPEdemo1 = "071228HWSXXXX100"
;-->071228 2007-12-28
;-->HWS hardware scan
;-->XXXX 用户定义
;-->100 version 1.00

;路径定义
[DIR_DEF]
INPUT_DIR=/home/desay/openwrt/allwinner_package/build/a13-olinuxino_livesuit
EFEX_DIR=/home/desay/openwrt/allwinner_package/allwinner-tools/livesuit/a13/eFex

;文件列表
[FILELIST]
;----------------------------------------------------maintype与subtype不可改变----------------------------------------------;
    ;-------------------------------公共部分---------------------------------------;

    ;-->固定不变的
    {filename = INPUT_DIR .. "sys_config.fex",   maintype = ITEM_COMMON,       subtype = "SYS_CONFIG000000",},
    {filename = INPUT_DIR .. "sys_config1.fex",  maintype = ITEM_COMMON,       subtype = "SYS_CONFIG100000",},
    {filename = INPUT_DIR .. "split_xxxx.fex",   maintype = ITEM_COMMON,       subtype = "SPLIT_0000000000",},
    ;-->bootloader, enviroment, kernel, rootfs
    {filename = INPUT_DIR .. "bootloader.fex",   maintype = ITEM_ROOTFSFAT16,  subtype = "BOOTLOADER_00000",},
    {filename = INPUT_DIR .. "env.fex",          maintype = ITEM_ROOTFSFAT16,  subtype = "ENVIROMENT_00000",},
    ;{filename = INPUT_DIR .. "boot.fex",         maintype = ITEM_ROOTFSFAT16,  subtype = "KERNEL_000000000",},
    {filename = INPUT_DIR .. "rootfs.fex",       maintype = ITEM_ROOTFSFAT16,  subtype = "ROOTFS_000000000",},
    {filename = INPUT_DIR .. "rootfs2.fex",       maintype = ITEM_ROOTFSFAT16,  subtype = "ROOTFS_000000000",},
    ;-->boot文件
    {filename = INPUT_DIR .. "boot0.bin",        maintype = ITEM_BOOT,         subtype = "BOOT0_0000000000",},
    {filename = INPUT_DIR .. "boot1.bin",        maintype = ITEM_BOOT,         subtype = "BOOT1_0000000000",},


    ;-------------------------------usb下载部分-------------------------------------;
    ;-->tools文件
    {filename = EFEX_DIR .. "usb/tools.fex",    maintype = ITEM_PHOENIX_TOOLS,        subtype = "xxxxxxxxxxxxxxxx",},

    ;-->fes文件
    {filename = EFEX_DIR .. "usb/fes_1-1.fex",          maintype = ITEM_FES,          subtype = "FES_1-1000000000",},
    {filename = EFEX_DIR .. "usb/fes_1-2.fex",          maintype = ITEM_FES,          subtype = "FES_1-2000000000",},
    {filename = EFEX_DIR .. "usb/fes_2.fex",            maintype = ITEM_FES,          subtype = "FES_200000000000",},
    {filename = EFEX_DIR .. "usb/fes.fex",              maintype = ITEM_FES,          subtype = "FES_000000000000",},

    ;-->fet文件
    {filename = EFEX_DIR .. "usb/HW_scan.axf",          maintype = ITEM_FET,          subtype = "HW_SCAN_00000000",},
    ;{filename = EFEX_DIR .. "usb/HW_init.axf",         maintype = ITEM_FET,          subtype = "HW_INIT_00000000",},
    ;{filename = EFEX_DIR .. "usb/FW_scan.axf",         maintype = ITEM_FET,          subtype = "FW_SCAN_00000000",},
    {filename = EFEX_DIR .. "usb/update_boot0.axf",     maintype = ITEM_FET,          subtype = "UPDATE_BOOT0_000",},
    {filename = EFEX_DIR .. "usb/update_boot1.axf",     maintype = ITEM_FET,          subtype = "UPDATE_BOOT1_000",},
    {filename = EFEX_DIR .. "usb/fet_restore.axf",      maintype = ITEM_FET,          subtype = "FET_RESTORE_0000",},

    {filename = EFEX_DIR .. "usb/magic_cr_start.fex",   maintype = ITEM_FET,          subtype = "MAGIC_CRC_START_",},
    {filename = EFEX_DIR .. "usb/magic_cr_end.fex",     maintype = ITEM_FET,          subtype = "MAGIC_CRC_EN_000",},
    {filename = EFEX_DIR .. "usb/magic_de_start.fex",   maintype = ITEM_FET,          subtype = "MAGIC_DE_START_0",},
    {filename = EFEX_DIR .. "usb/magic_de_end.fex",     maintype = ITEM_FET,          subtype = "MAGIC_DE_END_000",},

    ;-->fed文件
    {filename = EFEX_DIR .. "usb/fed_nand.axf",         maintype = ITEM_FED,          subtype = "FED_NAND_0000000",},


    ;-------------------------------卡量产部分----------------------------------------;

    ;-->固定不变的PC使用
    {filename = EFEX_DIR .. "card/cardtool.fex",        maintype = "12345678",        subtype = "1234567890cardtl",},
    {filename = EFEX_DIR .. "card/cardscript.fex",      maintype = "12345678",        subtype = "1234567890script",},

    ;-->需要烧写到卡上的文件
    {filename = INPUT_DIR .. "card_boot0.fex",      maintype = "12345678",        subtype = "1234567890boot_0",},
    {filename = INPUT_DIR .. "card_boot1.fex",      maintype = "12345678",        subtype = "1234567890boot_1",},
    {filename = INPUT_DIR .. "mbr.fex",             maintype = "12345678",        subtype = "1234567890___mbr",},
    {filename = INPUT_DIR .. "dlinfo.fex",          maintype = "12345678",        subtype = "1234567890dlinfo",},

    {filename = EFEX_DIR .. "usb/card_update_boot0.axf",      maintype = ITEM_FET,        subtype = "CARD_UPDATE_BOT0",},
    {filename = EFEX_DIR .. "usb/card_update_boot1.axf",      maintype = ITEM_FET,        subtype = "CARD_UPDATE_BOT1",},
    {filename = EFEX_DIR .. "usb/fed_card.axf",               maintype = ITEM_FED,        subtype = "CARD_FED_0000000",},
    {filename = EFEX_DIR .. "usb/card_HW_scan.axf",           maintype = ITEM_FET,          subtype = "CARD_HW_SCAN_000",},
    {filename = EFEX_DIR .. "usb/aultools.fex", maintype = "UPFLYTLS",                subtype = "xxxxxxxxxxxxxxxx",},
    {filename = EFEX_DIR .. "usb/aultls32.fex", maintype = "UPFLTL32",                subtype = "xxxxxxxxxxxxxxxx",},

    ;-------------------------------其他----------------------------------------------;
;-------------------------------------------maintype与subtype不可改变-------------------------------------------------------;

;镜像配置信息
[IMAGE_CFG]
version = 0x100234                ;-->Image的版本
pid = 0x00001234                  ;-->产品ID
vid = 0x00008743                  ;-->供应商ID
hardwareid = 0x100                ;-->硬件ID bootrom
firmwareid = 0x100                ;-->固件ID bootrom
bootromconfig = "bootrom_071203_00001234.cfg"
rootfsconfig = "rootfs.cfg"
imagename=output/a13-olinuxino_livesuit.img
filelist = FILELIST

制作镜像

通过mk_livesuit_img.sh脚本制作suit镜像。

 % scripts/mk_livesuit_img.sh --help
Usage (linux): scripts/mk_livesuit_img.sh -R [rootfs.img] -s [system.img]
Usage (android): scripts/mk_livesuit_img.sh -b [boot.img] -s [system.img] -r [recovery.img]

笔者使用的是linux方案。对于linux，rootfs.img的文件系统格式可以根据需要而定。笔者准备使用squashfs。