Dear ppclinux gurus, I have just compiled linux-2.6.24 for a MPC8540 target using a MPC8540 specific gcc.
After my first attempt using ARCH=ppc, leading to an infinity of messages : "SPE used in kernel", I recompiled the whole kernel sources using the default ARCH (ARCH=powerpc). I now have a kernel that does not complain about "SPE used in kernel", but user processes still crash ramdomly. Searching around, I learned that the E500 GPR registers are 64-bits wide, and gcc targetted for powerpc-linuxspe uses them sometimes. In the other PPC32 targets, those registers are 32-bits wide. The specific E500 64-bit move instructions are `evstdd' and `evldd'. I searched in the linux kernel sources (2.6.24) but did not find where those GPR registers could be saved in 64-bit mode for context-switch. Is there a patch pending somewhere to preserve the E500 GPR's in 64-bit mode for context-switch ? Philippe _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
