tree 601fa49272b540b3a3e6cc3728db27c525b73721
parent 30c91d576e9ea41c963e7f28643219bda73b0ddc
author David S. Miller <davem@davemloft.net> 1140583873 -0800
committer David S. Miller <davem@sunset.davemloft.net> 1142846035 -0800

[SPARC64]: Make use of Niagara 256MB PTEs for kernel mappings.

We use a bitmap, one bit for every 256MB of memory.  If the
bit is set we can use a 256MB PTE for linear mappings, else
we have to use a 4MB PTE.

SUN4V support is there, and we can very easily add support
for Panther cpu 256MB PTEs in the future.

Signed-off-by: David S. Miller <davem@davemloft.net>