How to load encrypted module using secured kernel on C6748

Hi,

We use C6748 generic secured device for our project.

I am  interesting in explanation (embedded code only) for how to use SK_decryptMod feature for decrypting my module.

If it possible I am interesting in  some short example, the same way there is example for SK_SetUserKey feature in the user guid.

1.  Does DSP should be in secured mode (Exit mode = SecureWithSK) or not?

2.  Is any memory placement constraint (DDR? L2RAM? shared RAM?) or I can use any of them (taking into the account the secured kernel constraint at the start of L2RAM?

3.  Using this function I had some strange undocumented result values:  -256, address of the input buffer, why is that happens?

4.  What should be the return value in case of success?

Thanks

Dani