Dear everyone, im working on a project wich aims at porting the 2.6.38 kernel to an arm11 mpcore based board. The kernel fails to boot, in the paging_init func, it throws an exception (pc: FFFF_000C) when executing the third mcr instruction in the list below: 0xc000bf34 <>: blx r3 0xc000bf38 <>: mov r5, #0 ; 0x0 0xc000bf3c <>: mcr 15, 0, r5, cr7, cr10, {4} 0xc000bf40 <>: mcr 15, 0, r5, cr8, cr6, {0} 0xc000bf44 <>: mcr 15, 0, r5, cr8, cr5, {0} //throws an exception here, Invalidate Instruction TLB Register 0xc000bf48 <>: mcr 15, 0, r5, cr7, cr5, {6} 0xc000bf4c <>: mcr 15, 0, r5, cr7, cr10, {4} 0xc000bf50 <>: mcr 15, 0, r5, cr7, cr5, {4} 0xc000bf54 <>: ldr lr, [pc, #176] ; 0xc000c00c The kernel has been patched with the 2.6.38-arm1 patch, and configured to be as minimal as possible (the vmlinux.elf is 1.8MB) and cross-compiled with the Codesourcery gcc toolchain. The minimal size is improtant because the aim is to make the kernel run with only 5-6MB of memory (from c0000000 to c0500000). The 'boot_loader' i wrote passes the atag pointers (basically core and memory) and the kernel seemingly reads and parses them fine. The __log_buf before the exception: <5>Linux version 2.6.38-rc8 (VirtualBox) (gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41) ) #6 Wed Nov 9 21:59:29 CET 2011 <4>CPU: ARMv6-compatible processor [410fb025] revision 5 (ARMv7), cr=08c5387f" <4>CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache <4>Machine: ARM-RealView PB11MPCore <5>Ignoring RAM at c0000000-c04fffff (vmalloc region overlap). The last one might be solved with setting the high mem option before compiling (it might be a problem as i load the whole kernel to that region). Im only a beginner, and im sorry for the low quality of the question, i appreciate any help. Even comments on how 'accomplishable' this project is. Also, the board is not a realview board, but it might not be an issue at this stage. Thank you in advance. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-arm-kernel