T2/Linux fails to boot on r12k Sgi/O2

[rxrbln]

It is widely known that the speculative execution and cache coherency of r10k based O2 cause Linux instability. However, historically archived web looked like it should boot. For a r12k O2 I could not yet get arcload (which surprisingly works ;-) to load and execute the Linux kernel.

http://www.total-knowledge.com/progs/mips/R10K-issue.shtml https://bukosek.si/hardware/collection/sgi-o2.html (various internal Sgi specs) http://www.pfrst.de/download.html http://www.total-knowledge.com/progs/mips/vice/ https://www.linux-mips.org/~glaurung/