I don't think so, I managed to interrupt the boot to run printenv:
>printenv
bootargs=console=ttyS0,115200 mem=110M root=/dev/mtdblock5 rootfstype=squashfs init=/linuxrc
bootcmd=sf read 0x200100 0x8000 0x8000;sf read 0x2000000 0xf0000 0x180000;bootm 0x2000000
bootdelay=3
baudrate=115200...