LRAT is described in "EREF: A Programmer’s Reference Manual for Freescale Power Architecture Processors" and implemented in e6500 core as described in this document. Here is a direct link to this document:
http://www.nxp.com/files-static/32bit/doc/ref_manual/EREF_RM.pdf
For the description of LRAT and information how to initialize LRAT please look Section 7.5.5
Multi-threading is described in Chapter 2 of this document. For enable/disable procedure please look Section 2.3.1.1
Have a great day,
Alexander
TIC
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