linux/arch/arm/mach-ixp23xx
Lennert Buytenhek 23759dc643 [ARM] 3439/2: xsc3: add I/O coherency support
Patch from Lennert Buytenhek

This patch adds support for the I/O coherent cache available on the
xsc3.  The approach is to provide a simple API to determine whether the
chipset supports coherency by calling arch_is_coherent() and then
setting the appropriate system memory PTE and PMD bits.  In addition,
we call this API on dma_alloc_coherent() and dma_map_single() calls.
A generic version exists that will compile out all the coherency-related
code that is not needed on the majority of ARM systems.

Note that we do not check for coherency in the dma_alloc_writecombine()
function as that still requires a special PTE setting.  We also don't
touch dma_mmap_coherent() as that is a special ARM-only API that is by
definition only used on non-coherent system.

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-04-02 00:07:39 +01:00
..
core.c [ARM] 3388/1: ixp23xx: add core ixp23xx support 2006-03-28 21:18:54 +01:00
espresso.c [ARM] 3438/1: ixp23xx: add pci slave support 2006-04-01 18:33:35 +01:00
ixdp2351.c [ARM] 3388/1: ixp23xx: add core ixp23xx support 2006-03-28 21:18:54 +01:00
Kconfig [ARM] 3388/1: ixp23xx: add core ixp23xx support 2006-03-28 21:18:54 +01:00
Makefile [ARM] 3388/1: ixp23xx: add core ixp23xx support 2006-03-28 21:18:54 +01:00
Makefile.boot [ARM] 3388/1: ixp23xx: add core ixp23xx support 2006-03-28 21:18:54 +01:00
pci.c [ARM] 3439/2: xsc3: add I/O coherency support 2006-04-02 00:07:39 +01:00
roadrunner.c [ARM] 3388/1: ixp23xx: add core ixp23xx support 2006-03-28 21:18:54 +01:00