On Tue, Jul 24, 2012 at 01:32:59PM +0000, Nuno Santos wrote: > Hi > > As I explained in a previous post, I have a Tegra2 based board (Harmony) > and (thanks to your help) I successfully managed to flash and boot U-Boot. > > However, I’ve been trying to boot Linux from U-Boot but to no avail. Once the > device runs U-boot, I load a Linux image into memory over TFTP, run the > command “bootm”, and then Linux immediately hangs after printing message > “Starting kernel ...". > > I’ve tried multiple suggestions I’ve seen online: defining linux console > boot in the “bootargs” parameter in case it is a console misconfiguration, > recompile the kernel with CONFIG_DEBUG_LL to diagnose the problem, and check > the machine id (by providing machine id 0xAAB in the environment var > “machid”). In all these attempts there is no change whatsoever in the output. You need to pass earlyprintk in bootargs to see early debug output (CONFIG_DEBUG_LL). Also make sure that you've flashed with the correct ODMDATA set so the output goes to the correct UART. > I’d be really grateful if someone could give me a hand on this. So, here’s > the details. > > 1. I’m using the kernel from git://nv-tegra.nvidia.com/linux-2.6.git, > pulled today and configured as indicated in the doc (make tegra_defconfig); > the compilation also creates a uImage for U-Boot. I’m using the latest version > of U-Boot, compiled locally using the standard procedure. It might help to try and run the upstream kernel just to check that everything works. I believe the NVIDIA downstream kernels currently don't boot properly when run from the upstream U-Boot. But I may be mistaken. Thierry
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