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Booting the New Linux Kernel
4-16
4.8 Booting the New Linux Kernel
After building the new kernel, in order to use it to boot the DaVinci board,
you must transfer it to the board via TFTP. It is assumed you have
completed the steps in Section 4.5, Building a New Linux Kernel and the
boot file, uImage has been copied to /tftpboot (or some other site-specific
TFTP accessible location).
1) Power on the EVM board, and abort the automatic boot sequence by
pressing a key in the console window (Section 2.2).
2) Set the following environment variables. (This assumes you are
starting from a default, clean U-Boot environment. See Section 3.1,
Default Boot Configuration for information on the U-Boot default
environment.)
EVM # setenv bootcmd 'dhcp;bootm'
EVM # setenv serverip <tftp server ip address>
EVM # setenv bootfile uImage
EVM # setenv bootargs mem=232M console=ttyS0,115200n8
root=/dev/mtdblock0 rw rootfstype=yaffs2 ip=dhcp
video=davincifb:vid0=0,2025K:vid1=0,
1350K:osd0=720x576x16,
2025K davinci_enc_mgr.ch0_output=COMPOSITE
davinci_enc_mgr.ch0_mode=ntsc
EVM # saveenv
Note that the setenv bootargs command should be typed on a
single line.
3) Boot the board:
EVM # boot
This configuration boots a new Linux kernel via TFTP with a NAND flash
based file system. To boot using an NFS file system, see Section A.4.4.
For instructions on how to verify that your host workstation is running a
TFTP server, and for instructions on what to do if it isn’t, see Section A.3.
For more details on booting, see Section A.4.