about uclinux for armnommu dma allocate issue

about uclinux for armnommu dma allocate issue

[Wan ZongShun]

Hi Greg,

I am programming ohci driver for my arm7 based on 2.6.38.

td_alloc -> dma_pool_alloc -> dma_alloc_coherent().

In previous uclinux version, there is the consistent.c located in
arch/armnommu/mm to implement
this dma_alloc_coherent, but now this latest version, I did not see
this 'dma_alloc_coherent' function
for armnommu, so I can use this function directly like this arm mmu?

In addtion, the 'kmalloc' is the same to previous uclinux armnommu
version? I can use it directly?

Wan.

thanks!
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about uclinux for armnommu dma allocate issue

[Greg Ungerer]

Hi Wan,

On 11/04/11 00:04, Wan ZongShun wrote:
> I am programming ohci driver for my arm7 based on 2.6.38.
>
> td_alloc ->  dma_pool_alloc ->  dma_alloc_coherent().
>
> In previous uclinux version, there is the consistent.c located in
> arch/armnommu/mm to implement
> this dma_alloc_coherent, but now this latest version, I did not see
> this 'dma_alloc_coherent' function
> for armnommu, so I can use this function directly like this arm mmu?

Yes. There is no separate one for the nommu case. It just
uses the standard one in arch/arm/mm/dma-mapping.c.


> In addtion, the 'kmalloc' is the same to previous uclinux armnommu
> version? I can use it directly?

Oh, yes. There is no changes in how that works.

Regards
Greg