The VxWorks BSP template needs to be updated to implement the workaround for PPC405 errata 213.
The workaround should be placed in sysALib.s immediately after clearing the MSR at which point bits 1 and 3 of CCR0 are set. Note that these bits are undocumented by IBM.
Failure to implement this fix can lead to random memory corruption.
This issue has been resolved in EDK 8.1 service pack 1