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3 Commits

Author SHA1 Message Date
Paul Mundt 4a4a9be3eb sh: Move arch_get_unmapped_area() in to arch/sh/mm/mmap.c. 
Now that arch/sh/mm/mmap.c exists, move arch_get_unmapped_area() there.
Follows the ARM change.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
 2008-12-22 18:42:49 +09:00
Paul Mundt 10840f034e sh: Don't factor in PAGE_OFFSET for valid_phys_addr_range() check. 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
 2008-11-13 15:38:02 +09:00
Paul Mundt 185aed7557 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 <saito@densan.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
 2008-11-12 12:53:48 +09:00