Thread (38 messages) 38 messages, 4 authors, 2007-09-24

Re: [patch 3/6] Walnut DTS

From: Segher Boessenkool <hidden>
Date: 2007-09-05 11:39:16

quoted
Hrm.. I'm still slightly uneasy though.  In my Ebony device tree, the
POB's ranges exists to embed the 32-bit OPB space into the 64-bit PLB
space by tacking on a 0x1 in bits 32:35.  In your 405gp ranges, you're
describing just the address range used by OPB peripherals
(0xef600000-0xf0000000) as residing at address 0 in OPB-space.

Since the ranges will still generate the right physical addresses, I
guess it doesn't matter.  But I'm not sure it meets the principle of
least surprise - since I think the documentation generally talks as
though addresses on the 405 OPB bus are identical to addreses on the
PLB.
I don't care either way.  If I remember correctly, this way of doing it
came out of a discussion with Segher.
I don't think I ever said that this is a better way of doing things --
then again, I change my mind now and then.

Someone needs to write down a proposed device binding for these busses,
and then we can really discuss things ;-)


Segher
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help