lichee编译u-boot（Allwinner A80）
在下面这个文件中定制u-boot的命令
brandy/u-boot-2011.09/include/configs/sun9iw1p1.h
添加lib
vi brandy/u-boot-2011.09/Makefile
编译u-boot
cd brandy/u-boot-2011.09/
make sun9iw1p1_config
make
产生u-boot文件
ll tools/pack/chips/sun9iw1p1/bin/
boot0_nand_sun9iw1p1.bin
boot0_sdcard_sun9iw1p1.bin
fes1_sun9iw1p1.bin
u-boot-sun9iw1p1.bin
uboot相关的config默认是在tools/pack/chips/sun9iw1p1/configs/cubieboard4下
env.cfg ---env分区内容，保存uboot命令的一些环境变量
sys_partition.fex ----用pack脚本打包时的分区布局
sys_config.fex ----u-boot硬件参数
更新boot0
boot0有两种，从sd卡启动用boot0_sdcard.fex， 从nand启动用boot0_nand.fex
cd ${LICHEE_ROOT}/tools/pack
#copy boot0
cp -fv chips/sun9iw1p1/bin/boot0_nand_sun9iw1p1.bin out/boot0_nand.fex
cp -fv chips/sun9iw1p1/bin/boot0_sdcard_sun9iw1p1.bin out/boot0_sdcard.fex
cp -fv chips/sun9iw1p1/bin/fes1_sun9iw1p1.bin out/fes1.fex
unix2dos out/sys_config.fex
#compile fex file
pctools/linux/mod_update/script out/sys_config.fex
#patch boot0
pctools/linux/mod_update/update_boot0 out/boot0_sdcard.fex out/sys_config.bin SDMMC_CARD
pctools/linux/mod_update/update_boot0 out/boot0_nand.fex out/sys_config.bin NAND
pctools/linux/mod_update/update_fes1 out/fes1.fex out/sys_config.bin
把boot0烧写到卡上
dd if=boot0_sdcard.fex of=/dev/sdc bs=1k seek=8
dd if=boot0_sdcard.fex of=/dev/nand bs=1k seek=8
更新u-boot
cd ${LICHEE_ROOT}/tool/pack
cp -fv chips/sun9iw1p1/configs/optimus/sys_config.fex out/sys_config.fex
cp -fv chips/sun9iw1p1/bin/u-boot-sun9iw1p1.bin out/u-boot.fex
unix2dos out/sys_config.fex
pctools/linux/mod_update/script out/sys_config.fex
pctools/linux/mod_update/update_uboot out/u-boot.fex out/sys_config.bin
把u-boot烧写到卡上
dd if=u-boot.fex of=/dev/sdc bs=1k seek=19096这样，板子上电启动后就能进到u-boot的命令行界面了，可以从串口上读取并显示
接着，再制作一个启动分区，不用太大，注意启始扇区从2048开始，大小的话32MB足够了
Command (m for help): p
Disk /dev/sdc: 7.4 GiB, 7948206080 bytes, 15523840 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-15523839, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-15523839, default 15523839): +32M
Created a new partition 1 of type 'Linux' and of size 32 MiB.
Command (m for help): t
Selected partition 1
Partition type (type L to list all types): c
Changed type of partition 'Linux' to 'W95 FAT32 (LBA)'.
Command (m for help): p
Disk /dev/sdc: 7.4 GiB, 7948206080 bytes, 15523840 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/sdc1 2048 67583 65536 32M c W95 FAT32 (LBA)
格式化成fat16，卷标名为boot
mkfs.vfat -n boot /dev/sdc1把把linux内核uImage放到该分区中就可以从u-boot加载
查看env
cubieboard4#printenv
baudrate=115200
boot_fastboot=fastboot
boot_normal=sunxi_flash read 40007800 boot;bootm 40007800
boot_recovery=sunxi_flash read 40007800 recovery;boota 40007800
bootargs=console=ttyS0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 init=/init loglevel=8 partitions=
bootcmd=run setargs_mmc boot_normal
bootdelay=3
console=ttyS0,115200
ethact=eth0
init=/init
loglevel=8
mmc_root=/dev/mmcblk0p2
nand_root=/dev/nandd
setargs_mmc=setenv bootargs console=${console} root=${mmc_root} rootfstype=ext4 init=${init} loglevel=${loglevel} partitions=${partitions}
setargs_nand=setenv bootargs console=${console} root=${nand_root} rootfstype=ext4 init=${init} loglevel=${loglevel} partitions=${partitions}
stderr=serial
stdin=serial
stdout=serial
Environment size: 767/131068 bytes
操作fat分区
cubieboard4#fatinfo mmc 0:1
Interface: MMC
Device 0: Vendor: MID 000003 PSN 2a1d0c8e Rev: PRV 8.0 Prod: PNM SU08G
Type: Removable Hard Disk
Capacity: 7580.0 MB = 7.4 GB (15523840 x 512)
Partition 1: Filesystem: FAT16 "boot "cubieboard4#fatls mmc 0:1
2817256 uimage
1 file(s), 0 dir(s)
加载kernel
fatload mmc 0:1 40007800 uimage
cubieboard4#bootm 40007800
## Booting kernel from Legacy Image at 40007800 ...
Image Name: Linux-3.4.39
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2817192 Bytes = 2.7 MiB
Load Address: 20008000
Entry Point: 20008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
[ 336.190][mmc]: MMC Device 2 not found
[ 336.193][mmc]: mmc not find, so not exit
[ 336.198]
Starting kernel ...
Uncompressing Linux... done, booting the kernel.