ARM: memblock: setup lowmem mappings using memblock

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Use memblock information to setup lowmem mappings rather than the
membank array.

This allows platforms to manipulate the memblock information during
initialization to reserve (and remove) memory from the kernel's view
of memory - and thus allowing platforms to setup their own private
mappings for this memory without causing problems with multiple
aliasing mappings:

	size = min(size, SZ_2M);
	base = memblock_alloc(size, min(align, SZ_2M));
	memblock_free(base, size);
	memblock_remove(base, size);

This is needed because multiple mappings of regions with differing
attributes (sharability, type, cache) are not permitted with ARMv6
and above.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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This commit is contained in:

Russell King 2010-10-27 19:57:38 +01:00

parent f25b4b4c89

commit 8df6516864

1 changed files with 29 additions and 20 deletions

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arch/arm/mm/mmu.c

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