4 Commits

Author	SHA1	Message	Date
Magnus Damm	e7cc9a7340	sh: trapped io support V2 ... The idea is that we want to get rid of the in/out/readb/writeb callbacks from the machvec and replace that with simple inline read and write operations to memory. Fast and simple for most hardware devices (think pci). Some devices require special treatment though - like 16-bit only CF devices - so we need to have some method to hook in callbacks. This patch makes it possible to add a per-device trap generating filter. This way we can get maximum performance of sane hardware - which doesn't need this filter - and crappy hardware works but gets punished by a performance hit. V2 changes things around a bit and replaces io access callbacks with a simple minimum_bus_width value. In the future we can add stride as well. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>	2008-02-14 14:22:09 +09:00
Paul Mundt	830626caf8	sh: Fix up switch_to() type casts. ... Signed-off-by: Paul Mundt <lethal@linux-sh.org>	2008-01-28 13:19:00 +09:00
Stuart Menefy	cbaa118ecf	sh: Preparation for uncached jumps through PMB. ... Presently most of the 29-bit physical parts do P1/P2 segmentation with a 1:1 cached/uncached mapping, jumping between the two to control the caching behaviour. This provides the basic infrastructure to maintain this behaviour on 32-bit physical parts that don't map P1/P2 at all, using a shiny new linker section and corresponding fixmap entry. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>	2008-01-28 13:18:59 +09:00
Paul Mundt	a62a3861e0	sh: Split out system.h in to _32 and _64 variants. ... Signed-off-by: Paul Mundt <lethal@linux-sh.org>	2008-01-28 13:18:42 +09:00