MFC r256937:

MFC r256937:

MFP4:
Change 231031 by brooks@brooks_zenith on 2013/07/11 16:22:08

	Turn the unused and uncompilable MIPS_DISABLE_L1_CACHE define in
	cache.c into an option and when set force I- and D-cache line
	sizes to 0 (the latter part might be better as a tunable).

	Fix some casts in an #if 0'd bit of code which attempts to
	disable L1 cache ops when the cache is coherent.

Sponsored by:	DARPA/AFRL

git-svn-id: svn://svn.freebsd.org/base/stable/10@261277 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f