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Re: MI overrides of bus_dma(9), bus_space(9), pci(9)
On Wed, Mar 10, 2010 at 10:50 PM, Martin Husemann
> On Wed, Mar 10, 2010 at 09:46:03PM +0900, Masao Uebayashi wrote:
>> [..] For example,
>> bus_addr_t of a device instance should be taught to struct device as
>> an attribute (or property or whatever you call).
> What is *the* "bus_addr_t of a device instance"?
And this answer has never been answered. This is why we have all the
messy MD bus code like rbus...
>> Then we can have a
>> unified way to calculate the physical address of the device, by
>> summing up its parents' bus_addr_t.
> I'm neither sure this could be done on all archs,
It *should* be done on *all* archs.
> nor why you would want to do this at all.
Because NetBSD/arm (imx31) had no bus_space_mmap(9). See
grep -r bs_notimpl_bs_mmap sys/arch/arm
The problem is MD code is responsible to everything.
(And this is where I started being side-tracked horribly from XIP...)
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