tree ee47f43af373d0c021cc83ff9e22925942e9d001
parent 92078e0618f525e22945040b5daea21d4b6d4a16
author David Daney <ddaney@caviumnetworks.com> 1255547816 -0700
committer Ralf Baechle <ralf@linux-mips.org> 1261015021 +0000

MIPS: Put PGD in C0_CONTEXT for 64-bit R2 processors.

Processors that support the mips64r2 ISA can in four instructions
convert a shifted PGD pointer stored in the upper bits of c0_context
into a usable pointer.  By doing this we save a memory load and
associated potential cache miss in the TLB exception handlers.

Since the upper bits of c0_context were holding the CPU number, we
move this to the upper bits of c0_xcontext which doesn't have enough
bits to hold the PGD pointer, but has plenty for the CPU number.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>