Re: Problems with alpha/pci + radeon/ttm

Richard Henderson
2010-06-28T16:38:44Z

On 06/28/2010 02:03 AM, Michael Cree wrote:
> On 28/06/10 11:14, Dave Airlie wrote:
>> The bus error is caused by the kernel, its something alpha specific
>> with how mmap works,
>> I'm not sure if alpha needs some special mmap flags or something,
>
> Neither am I. All I know is that Alpha reorders CPU instructions more
> aggressively than most other architectures, the page map size is 8kB,
> and memory accesses must be aligned to the datum size.

There are no special mmap flags on alpha. The non-cacheable property
is a function of the physical address (e.g. bit 40 set for ev5), and
this has already been taken care of by the kernel.

r~