Jason R Thorpe wrote:

>  > Is anyone working to update tc_bus_mem.c to fix this?
>  > Anyway, bba configuration in TCWSCONS should be disabled for now...
> 
> Actually, this is a bug in the `bba' driver.
> 
> Alpha and DECstation are little-endian, and the bytes happen to be
> padded out.  So, do 4-byte access with the byte you want in the least
> significant 8-bits of the 4-byte longword.
> 
> The following patch should make it go:

[cut]

I tested your patch on pmax and there are no problems.

> Anyway, I also noticed that there's a TIMETOWASTE constant in there
> which looks like it was intended to implement a recovery delay.  It
> doesn't work -- the compiler optimizes the loop right out.  If the
> delay is really needed (which I would guess it is not, since it's
> not actually there right now), it should be done with delay().

With the internal toolchain, the loop is not 'optimised out' on the
mips.  Nevertheless, I removed the spin-loop and a quick evaluation
indicates the driver continues to operate correctly on pmax.

	-- Gregory McGarry <g.mcgarry@ieee.org>