Masa Murayama wrote:
> ----- Original Message -----
>
>>
>
> Typical sparc IOMMU DVMA range is 0xff000000 - 0xffffffff, the highest
> 16Mbyte in PCI memory sparce. Threfore, PCI master devices *must*
> support the range for dma.
>
> Recently I saw the same message for BCM4401 driver on sparc,
> the divece only supports the dma range of 0x00000000 - 0x40000000,
> the lowest 1Gbyte. So bcm4401 doesn't work on sparc.
>
Right. An interesting data point about SPARC -- I had forgotten that
limitation. There are a few other devices I've run into in the past
that had this limitation.
These days, it seems most device mfgr's understand that it is important
to support at least the full 32-bit address space, and more and more --
the full 64-bit address space.
-- Garrett
> -masa
>
>
>
>> Yet magic and hierarchy
>> arise from the same source,
>> and this source has a null pointer.
>>
>> Reference the NULL within NULL,
>> it is the gateway to all wizardry.
>>
>
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