[U-Boot] Regarding P2020 core 1

[U-Boot] Regarding P2020 core 1

[vinay hegde]

Hi All,

We are coming up with a new platform that uses Freescale P2020 processor and P2020 U-Boot. In this platform, we will be using only one core (core 0) of P2020 and will be disabling the core 1 (thro, some hardware strapping as hardware folks told me).

If anybody has already investigated and knows how to disable core 1 (and support only core 0) in P2020 U-Boot (or in general, say mpc8572), please let me know. Any pointers will be very useful.

Thanks
Vinay


      

[U-Boot] Regarding P2020 core 1

[Kumar Gala]

On Apr 7, 2010, at 1:11 AM, vinay hegde wrote:

> Hi All,
> 
> We are coming up with a new platform that uses Freescale P2020 processor and P2020 U-Boot. In this platform, we will be using only one core (core 0) of P2020 and will be disabling the core 1 (thro, some hardware strapping as hardware folks told me).
> 
> If anybody has already investigated and knows how to disable core 1 (and support only core 0) in P2020 U-Boot (or in general, say mpc8572), please let me know. Any pointers will be very useful.

You can use the 'cpu disable' command.

- k

[U-Boot] Regarding P2020 core 1

[vinay hegde]

Hi Kumar,

I have ported U-Boot for our new platform (which is based on P2020 and has other platform specific peripherals). So, actually I wanted to know how to disable core 1 in U-boot source code (I see MPC85xx_DEVDISR_CPU0 and MPC85xx_DEVDISR_CPU1 defines in immap_85xx.h, which are not used). 
So, in my case, when U-boot bringup code runs, it should initialize only core 0 and keep the other core in reset. 

Sorry, I think my earlier e-mail wasn't clear enough.

Thanks
Vinay

> > Hi All,
> > 
> > We are coming up with a new platform that uses
> Freescale P2020 processor and P2020 U-Boot. In this
> platform, we will be using only one core (core 0) of P2020
> and will be disabling the core 1 (thro, some hardware
> strapping as hardware folks told me).
> > 
> > If anybody has already investigated and knows how to
> disable core 1 (and support only core 0) in P2020 U-Boot (or
> in general, say mpc8572), please let me know. Any pointers
> will be very useful.
> 
> You can use the 'cpu disable' command.
> 
> - k


      

[U-Boot] Regarding P2020 core 1

[Kumar Gala]

You should just be able to remove CONFIG_MP from your board <CONFIG.h>

- k

On Apr 7, 2010, at 1:41 AM, vinay hegde wrote:

> Hi Kumar,
> 
> I have ported U-Boot for our new platform (which is based on P2020 and has other platform specific peripherals). So, actually I wanted to know how to disable core 1 in U-boot source code (I see MPC85xx_DEVDISR_CPU0 and MPC85xx_DEVDISR_CPU1 defines in immap_85xx.h, which are not used). 
> So, in my case, when U-boot bringup code runs, it should initialize only core 0 and keep the other core in reset. 
> 
> Sorry, I think my earlier e-mail wasn't clear enough.
> 
> Thanks
> Vinay
> 
>>> Hi All,
>>> 
>>> We are coming up with a new platform that uses
>> Freescale P2020 processor and P2020 U-Boot. In this
>> platform, we will be using only one core (core 0) of P2020
>> and will be disabling the core 1 (thro, some hardware
>> strapping as hardware folks told me).
>>> 
>>> If anybody has already investigated and knows how to
>> disable core 1 (and support only core 0) in P2020 U-Boot (or
>> in general, say mpc8572), please let me know. Any pointers
>> will be very useful.
>> 
>> You can use the 'cpu disable' command.
>> 
>> - k
> 
> 
>