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authorLennert Buytenhek <buytenh@wantstofly.org>2007-03-31 12:03:20 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-04-01 22:38:36 +0100
commit398e692fd5cecdd25d311b47bbae69f7bac3a3cb (patch)
treef1852c28d9f9c47c4763607630ac3db1c91930d6 /drivers
parent9a4d93d49d140c196020a1bae339efcf211cac03 (diff)
[ARM] 4298/1: fix memory barriers for DMA coherent and SMP platforms
This patch: - Switches mb/rmb/wmb back to being full-blown DMBs on ARM SMP systems, since mb/rmb/wmb are required to order Normal memory accesses as well. - Enables the use of DMB and ISB on XSC3 (which is an ARMv5TE ISA core but conforms to the ARMv6 memory ordering model and supports the various ARMv6 barriers.) - Makes DMA coherent platforms (only ixp23xx at the moment) map mb/rmb/wmb to dmb(), as on DMA coherent platforms, DMA consistent mappings are done as Normal mappings, which are weakly ordered. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions