OMAP2420-HS flashing question

OMAP2420-HS flashing question

[Andrejs Cainikovs]

Dear all,

I've googled that OMAP HS are checking some kind of signature (applications should be signed with the special tool (OST Tools)) so the developer must own the keys for particular CPU? It is possible to turn off the HS option so I'll be able to work with non-signed binaries?
The problem is that I want to get kernel running on custom OMAP2420-HS board but have no keys.

If somebody can send me the OMAP2420 HS (or similar) datasheet, I'll really appreciate that.

Thanks,
Andrejs Cainikovs.

Re: OMAP2420-HS flashing question

[Vladimir Pantelic]

Andrejs Cainikovs wrote:
> Dear all,
>
> I've googled that OMAP HS are checking some kind of signature (applications should be signed with the special tool
> (OST Tools)) so the developer must own the keys for particular CPU? It is possible to turn off the HS option so I'll
> be able to work with non-signed binaries? The problem is that I want to get kernel running on custom OMAP2420-HS
> board but have no keys.

no, it cannot be turned off, that would somehow counteract the "high" part in "high security"

> If somebody can send me the OMAP2420 HS (or similar) datasheet, I'll really appreciate that.

hehe, nice try... :-)

RE: OMAP2420-HS flashing question

[Woodruff, Richard]

> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
> owner@vger.kernel.org] On Behalf Of Andrejs Cainikovs
> Sent: Monday, October 19, 2009 12:33 PM

> I've googled that OMAP HS are checking some kind of signature (applications
> should be signed with the special tool (OST Tools)) so the developer must own
> the keys for particular CPU? It is possible to turn off the HS option so I'll
> be able to work with non-signed binaries?
> The problem is that I want to get kernel running on custom OMAP2420-HS board
> but have no keys.

With out keys it's mostly impossible to introduce new boot code into the system.

There isn't a practical way to 'turn off HS' with out destroying the omap chip itself.

The way to add code would be through what ever mechanism the OEM has left to add code into the system (if any).  From there depending on software some kind of KEXEC could be attempted.

Regards,
Richard W.

Re: OMAP2420-HS flashing question

[Andrejs Cainikovs]

Woodruff, Richard wrote:
>> I've googled that OMAP HS are checking some kind of signature (applications
>> should be signed with the special tool (OST Tools)) so the developer must own
>> the keys for particular CPU? It is possible to turn off the HS option so I'll
>> be able to work with non-signed binaries?
>> The problem is that I want to get kernel running on custom OMAP2420-HS board
>> but have no keys.
>>     
>
> With out keys it's mostly impossible to introduce new boot code into the system.
>
> There isn't a practical way to 'turn off HS' with out destroying the omap chip itself.
>
> The way to add code would be through what ever mechanism the OEM has left to add code into the system (if any).  From there depending on software some kind of KEXEC could be attempted.
>
> Regards,
> Richard W.
>   
Thanks Richard, unfortunately this is what I've expected to hear.

Regards,
Andrejs Cainikovs.

Re: OMAP2420-HS flashing question

[Andrejs Cainikovs]

Shankar Ganesh wrote:
> On Mon, Oct 19, 2009 at 1:32 PM, Andrejs Cainikovs 
> <andrejsc@globalautomationsystems.com 
> <mailto:andrejsc@globalautomationsystems.com>> wrote:
>
>     Dear all,
>
>     I've googled that OMAP HS are checking some kind of signature
>     (applications should be signed with the special tool (OST Tools))
>     so the developer must own the keys for particular CPU? It is
>     possible to turn off the HS option so I'll be able to work with
>     non-signed binaries?
>     The problem is that I want to get kernel running on custom
>     OMAP2420-HS board but have no keys.
>
>
>
> Try CSST [1] for 2430 , having signing support for 24xx. There are 
> default keys available with the release. You may go through quick 
> start guide  (available with binary) for further info.
>
> [1] 
> http://focus.ti.com/general/docs/wtbu/wtbugencontent.tsp?templateId=6123&navigationId=12013&contentId=4581 
> <http://focus.ti.com/general/docs/wtbu/wtbugencontent.tsp?templateId=6123&navigationId=12013&contentId=4581>  
>
Thanks Shankar,

This custom board is the part of dead Nokia phone, I really doubt it 
will work with default keys. Anyway, it is worth a try...

Regards,
Andrejs Cainikovs.