From: Paul Mundt Date: Wed, 12 Nov 2008 03:53:48 +0000 (+0900) Subject: sh: Provide a sane valid_phys_addr_range() to prevent TLB reset with PMB. X-Git-Tag: v2.6.28-rc5~3^2~6 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=185aed75570fb4f78ef283dfa26cd9da5fa06a91;p=pandora-kernel.git sh: Provide a sane valid_phys_addr_range() to prevent TLB reset with PMB. With the PMB enabled, only P1SEG and up are covered by the PMB mappings, meaning that situations where out-of-bounds physical addresses are read from will lead to TLB reset after the PMB miss, allowing for use cases like dd if=/dev/mem to reset the TLB. Fix this up to make sure the reference is between __MEMORY_START (phys) and __pa(high_memory). This is coherent across all variants of sh/sh64 with and without MMU, though the PMB bug itself is only applicable to SH-4A parts. Reported-by: Hideo Saito Signed-off-by: Paul Mundt --- Reading git-diff-tree failed