On Fri, Aug 21, 2015 at 3:30 PM, Miod Vallat <[email protected]> wrote: >> is 'bus_dma' >> http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man9/bus_dma.9 >> the <<equivalent>> of 'ioremap/ioread32' >> http://www.makelinux.net/ldd3/chp-9-sect-4-- >> ? > > I don't think so. > > It looks like you are attempting to port a PCI driver, and attempting to > access the device's register. > > PCI device regions in memory and I/O space are made available to the > kernel with pci_mapreg_map(), which gives you a bus_space_handle_t > suitable for use with thi bus_space(9) API. This would be a sugar-coated > equivalent of ioremap(). > > From then on, bus_space_read_(N/8) will match ioreadN() calls.
Thank you :-) I figure it was not dma by grep the call of those everywhere, still need to understand the mapping. ( working on the AMD Bobcat WDT actually, i have the base adress trough bus space map : in acpi 0xFED0 0000 and the then doc say go to 00b0 but i do not understand where this address makes sense, and how to write in it ) -- --------------------------------------------------------------------------------------------------------------------- () ascii ribbon campaign - against html e-mail /\
