Re: [Xenomai-core] User space drivers on PPC440

["Steven A. Falco" <sfalco@domain.hid>]

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That works perfectly.  Thanks!

    Steve


Philippe Gerum wrote:
> Philippe Gerum wrote:
>   
>> Steven A. Falco wrote:
>>     
>>> Solved.  As you pointed out, Xenomai inverts the returned value from
>>> request_region.  So, that was a bug in my application.
>>>
>>> However, turns out that instead of request_region, I have to use
>>> request_mem_region.  This is because the I/O region only goes up to
>>> 2^32, but the mem region goes up to 2^64.
>>>
>>> So, attached is a patch to add two new syscalls: rt_misc_get_mem_region
>>> and rt_misc_put_mem_region.
>>>
>>>       
>> Thanks. At this chance, I've reworked the I/O region support to
>> introduce descriptors, so that this API conforms to the
>> one-descriptor-per-object rule commonly followed by other services from
>> the native skin. I've merged your MMIO support on top of this. The added
>> bonus is that auto-cleanup upon process exit becomes available with I/O
>> regions too, since we now have the proper descriptor to hold the cleanup
>> data.
>>
>> The calls supporting this scheme are named rt_io_get_region, and
>> rt_io_put_region, taking a RT_IOREGION object descriptor to hold the
>> internal resource information. The rt_misc_io_get/put_region API is now
>> deprecated starting with 2.4-rc6, albeit still available to allow for
>> smooth transition; one will only get a warning as a reminder to upgrade
>> to the new calls when using the old ones. e.g.
>>
>> RT_IOREGION iorn;
>>
>> rt_io_get_region(&iorn, label, start, len, IORN_IOPORT)
>> is equivalent to calling:
>> rt_misc_get_io_region(start, len, label)
>>
>> the same way,
>>
>> rt_io_get_region(&iorn, label, start, len, IORN_MEMORY)
>>     
>
> s,IORN_MEMORY,IORN_IOMEM,
>
> (for consistency reason with Linux's naming scheme)
>
>   
>> is equivalent to calling:
>> rt_misc_get_mem_region(start, len, label)
>>
>> Conversely,
>>
>> rt_io_put_region(&iorn)
>> is equivalent to calling:
>> rt_misc_put_io/mem_region(start, len)
>>
>>
>>     
>
>
>   

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