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Booting the New Linux Kernel
DVEVM Software Setup 4-17
5) You can test the rebuilt DVEVM software by booting your NFS file
system and running the demos from the command line as described
in Section 3.4.
4.7 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 video=davincifb:vid0=720x576x16,
2500K:vid1=720x576x16,2500K:osd0=720x576x16,2025K
davinci_enc_mngr.ch0_output=COMPOSITE
davinci_enc_mngr.ch0_mode=$(videostd)
console=ttyS0,115200n8 noinitrd rw ip=dhcp
root=/dev/hda1 mem=120M
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 hard drive
based file system. To boot via TFTP 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.