Comment 2 for bug 1222863

Correct, the osl.c code is the starting point. There are two phases to these mappings within ACPI: (1) very early in the boot when it is assumed the tables are at physical addresses, and then (2) a second pass that tries to put the tables in a final location. I've got a patch that gets into the second phase but is not yet mapping the tables correctly -- will continue working that out and post here for testing eventually.