[okl4-developer] Iguana memsections

[Guillaume PETITJEAN]

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OK thanks.
And what about memsection_create_dma() ?
In fact I need to allocate an area that is uncacheable and this is the
only function where I can give some attributes like this.


Geoffrey Lee wrote:
> On Wed, Jul 16, 2008 at 12:34:19PM +0200, Guillaume PETITJEAN
> wrote: My understanding is that, in order to access a memsection, I
> need to call the following funtions: 1) memsection_create() 2)
> memsection_map(memsection_ref_t memsect, uintptr_t offset,
> physmem_ref_t phys)
>
> For 2) i don't understand why I should provide the phys addr. The
> application should not be manipulating phys addr right ?
>
>> Hi Guillaume
>
>> memsection_create() will create a memesection which backs it with
>> physical memory.  You can can also create a memsection that be
>> manually mapped with memsection_create_user().  The
>> memsection_map() API is supposed to allow you to map memory into
>> user-mapped memory sections.  The physmem reference can be
>> created with physpool_alloc(), and information can be obtained
>> from the physpool with physmem_info().
> libs/iguana/test/memsect_tests.c
>> contain some tests which contain some examples on how to use this
>> API.
>
>
>
>> -gl
>
> Could you explain the exact behaviour of these functions and how I
> should compute the phys addr ?
>
> Guillaume
>>
>>
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