Re: [microblaze-uclinux] Boa + SSL hanging after certificate download

[Ivan <salorankatu@xxxxxxxx>]

El mar, 25-10-2005 a las 04:29 -0700, Jonathan Jung escribió:
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> Hi Ivan,

Hi,

> 
> I may have run across a paper from your project previously... I do  
> remember the something about downloading the cores from the network.   
> Very interesting indeed!  I'm an undergrad working on this for my  
> senior project.

Yes, it is a good idea to upgrade the cores. I think that the John's
paper "Embedded Linux as a Platform for Dynamically Self-Reconfiguring
Systems-On-Chip" is the first previous work about it (using uCLinux, of
course). About my work, I have a paper and I need to look for it.

> 
> I'm actually 'cheating' a little by using Handel-C for this project  
> to create the hardware blocks.  I'll find out how many co-processors  
> cores into my FPGA to support different ciphers (starting with AES),  
> but I didn't plan to implement a self reconfiguring system (though I  
> could work on that, time allowing).

Yes, the use of Handle-C simplifies the development in order to obtain
quickly the designs. The problem when you implement a lot of cipher
cores is the area of the device. The partial reconfiguration is a good
solution to resolve this problem, you only implement the core that you
need :)

> 
> At the time you completed your project, were you using John William's  
> FSL driver, or your own?  What was the clock speed of your AES co- 
> processor?  How does the FPGA reconfigure itself on the fly (does the  
> microblaze continue to run, or does it halt)?

I did not implement a driver... I implemented functions to access
directly to the FSL buses (in uCLinux is not necessary to implement
drivers to have access to the hardware), but of course, I could use
John' FSL driver easily :)

About the MicroBlaze, yes, of course, the MicroBlaze is running during
the reconfiguration because it does the partial reconfiguration through
the SelectMAP interface (I used a GPIO to manages the SelectMAP using an
external connection).

Regards,

Ivan


		
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