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On Tuesday 27 May 2008 10:51:01 you wrote: > I'm trying to use kexec on a ASUS WL-500gP router (BCM47XX, little > endian MIPS) with a 2.6.25.4 kernel with some additional changes from > OpenWRT. > > Unfortunately, it doesn't work for me - when I load a new kernel and try > to execute it, it just says "Bye" and the router is dead: > > # kexec -l vmlinux > # kexec -e > (...) > Bye > > > I signalled the issue before in the past, with a 2.6.23.1 kernel: > > http://lists.infradead.org/pipermail/kexec/2008-February/001315.html > > > Ideas? Ways to debug it? I am using a 2.6.20 kernel on a 32bit mips platform and it is working fine. however I am using this userland code (make CROSS=$(your cross-compiler prefix) to compile it) : http://chac.le-poulpe.net/~nico/kexec.tar.gz Could you try to add the following line in machine_kexec.c, just before jumping to the trampoline: change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED); This disables caching on KSEG0, but I would be suprised to find the bcm47xx in the list of machines for which this line could be a "one way ticket to hell" :) (Well I still have my doubts regarding the issue of not flushing the instruction cache completely before jumping to the new kernel in the trampoline code). Regards, -- Nicolas Schichan |
