2009-03-10 10:40:43 non cahing the particular portion of the sdram
hari a (INDIA)
We have created the ldr file from vdsp with some of the sdram portion is non-cached. Because the same section is using for MDMA .
This one we are using as a loadable module in uClinux.
Here(uClinux) how we have to non-cache the particular sdram portion which was used in loadable module?
2009-03-10 10:54:29 non cahing the particular portion of the sdram
Michael Hennerich (GERMANY)
Message: 70705 You need to allocate none cacheable DMA memory using following functions.
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
There are various examples in Blackfin DMA capable device drivers.
2009-03-10 12:51:49 Re: non cahing the particular portion of the sdram
Robin Getz (UNITED STATES)
> We have created the ldr file from vdsp
As soon as I see that - I stop reading. Do not do that - it is not supported. Not supported means that no one will answer any questions you have.
The only thing that compiles things that works for compiling the Linux kernel - is gcc - see inux-2.6.x/Documentation/Changes - Current Minimal Requirements : Gnu C
2009-03-10 15:14:39 Re: non cahing the particular portion of the sdram
Mike Frysinger (UNITED STATES)
LDR files and Linux do not mix ... nor does it really make sense