From 9cc3a1ac9a819cadff05ca37bb7f208013a22035 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Tue, 21 Feb 2006 20:51:13 -0800
Subject: [PATCH] [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>
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