3559A如何设置uboot参数bootargs启动双系统？

大家好，我现在的uboot的env如下，请问要如何设置uboot的参数bootargs才能跑Liteos和Linux呢？求大神解救
arch=arm
baudrate=115200
board=hi3559av100
board_name=hi3559av100
bootargs=mem=512M console=ttyAMA0,115200 root=/dev/mtdblock2 rw init=/linuxrc rootfstype=yaffs2 rw mtdparts=hinand:1M(boot),9M(kernel),100M(rootfs) hbcomp=/dev/mtdblock3
bootcmd=nand read 0x42000000 0x100000 0x900000;bootm 0x42000000
bootdelay=2
cpu=armv8
ethact=gmac0
soc=hi3559av100
stderr=serial
stdin=serial
stdout=serial
vendor=hisilicon
verify=n

Environment size: 449/262140 bytes