Hi Sven Neumann, I can see you have tested a patch from "Daniel Mack" http://lists.infradead.org/pipermail/kexec/2012-December/007526.html Can you please help me with the following 1. On which target it has been tested ? 2. Which kernel is used for testing ? 3. What are the --command-line arguments you have passed ? I really appreciate your help. Thanks and Regards -Naresh Bhat On Fri, Nov 30, 2012 at 7:57 PM, Daniel Mack <zonque at gmail.com> wrote: > On 30.11.2012 14:58, Naresh Bhat wrote: >> Hi, >> >> I am using Versatile express target at Daughterboard Site 1: >> V2P-CA15_A7 Cortex A15 >> >> root at arm-cortex-a15:~# kexec -f zImage --dtb=vexpress.dtb >> --append="root=/dev/nfs rw ip=dhcp >> nfsroot=<Host-IP>:/mnt/sda3/nfs/cortexa15/core-image >> console=ttyAMA0,38400n8 nosmp" >> Starting new kernel >> Bye! >> Uncompressing Linux... > > That could be just that the new kernel is missing its bootargs cmdline > with the appropriate console= tag. How are you booting the first kernel? > Does you bootloader add a /chosen tag? > > Some suggestions: > > 1. Add a static CMDLINE to the second kernel, so it doesn't rely on that > information being passed from the first on. > > 2. Try running kexec without the --dtb option. kexec will then walk > /proc/device-tree and build up one dynamically (CONFIG_PROC_DEVICETREE > is needed for that). > > 3. Try passing --command-line to kexec. Note that this won't work > together with --dtb, as there's currently no code that adds the cmdline > to a dtb binary blob. But with two patches I recently submitted, it > works with the dynamic /proc/device-tree parsing mode. > > 4. In case you have LEDs connected to GPIOs on your board, configure > them to the heartbeat trigger mode. If that works, you know that the > kernel is actually booting, but just not showing anything on the console. > > 5. If 4) fails, try to toggle the GPIOs very early in the boot process, > as some sort of interface to trace the control flow, even without a JTAG. > > 6. In case you have CONFIG_THUMB2_KERNEL set, switch it off. I had no > luck yet booting into a kernel that was compiled in Thumb-2 mode. > > > Daniel >
