[U-Boot] [PATCH 3/4][v3] powerpc/85xx:Make debug exception vector accessible

[Prabhakar Kushwaha <prabhakar@freescale.com>]

Hi Scott,

On Wednesday 25 April 2012 08:20 PM, Scott Wood wrote:
> On 04/24/2012 11:05 PM, Andy Fleming wrote:
>> On Tue, Apr 24, 2012 at 10:48 PM, Prabhakar Kushwaha
>> <prabhakar@freescale.com>  wrote:
>>> Hi,
>>>
>>>
>>>
>>> On Wednesday 25 April 2012 02:50 AM, Andy Fleming wrote:
>>>>
>>>> On Tue, Apr 24, 2012 at 4:10 PM, Scott Wood<scottwood@freescale.com>
>>>>   wrote:
>>>>>
>>>>> On 04/24/2012 03:45 PM, Andy Fleming wrote:
>>>>>>
>>>>>> On Mon, Mar 26, 2012 at 4:00 AM, Prabhakar Kushwaha
>>>>>>>
>>>>>>> @@ -107,6 +107,7 @@
>>>>>>>   #define CONFIG_MAX_CPUS                        1
>>>>>>>   #define CONFIG_FSL_SDHC_V2_3
>>>>>>>   #define CONFIG_SYS_FSL_NUM_LAWS                12
>>>>>>> +#define CONFIG_SYS_PPC_E500_DEBUG_TLB  3
>>>>>>
>>>>>>
>>>>>> You've only enabled this for one processor. Maybe the P1010. Nowhere
>>>>>> in the patch description does it mention that this is only being
>>>>>> enabled for one chip. As it is, I think you meant to enable it for
>>>>>> more chips, and I'm wondering why it's not enabled for the other 
>>>>>> chips
>>>>>> mentioned in the comments above as being test platforms for this
>>>>>> patch...
>>>>>>
>>>>>> Probably, for this feature, we should make a default definition, 
>>>>>> which
>>>>>> can be overridden by other parts if necessary.
>>>>>>
>>>>>> In other words, add something like this near the end:
>>>>>>
>>>>>> #ifndef CONFIG_SYS_PPC_E500_DEBUG_TLB
>>>>>> #define CONFIG_SYS_PPC_E500_DEBUG_TLB 3
>>>>>> #endif
>>>>>
>>>>> We don't want to enable this on e500mc (testing in that context just
>>>>> means that we didn't break the code path where this isn't 
>>>>> enabled).  I'm
>>>>> not sure whether it will break anything if we do enable it on e500mc,
>>>>> but we don't need it.
>>>>
>>>> Ok, but we still either need this to be enabled for all e500/e500v2.
>>>> OR split off this config option into a separate patch where it's
>>>> mentioned that this is only being enabled on the P1010.
>>>>
>>>> Actually, it should probably be added to this area that deals in
>>>> core-specific config options:
>>>
>>>
>>>   I agree. I will split the debugger patch and P1010 debug enable.
>>> A separate patch will be send for P1010 SoC.
>>> For other e500v2 processor based SoC,as i am not sure about their
>>> verification.  It will be send as and when verified.
>>
>> That should be fine.
>
> Enabling it on individual SoCs based on verification conflicts with 
> putting this in the core-specific config area.
>
> Just test with a reasonable sample of SoCs, grep for TLB assignments 
> to look for any conflicts, and then enable it in the generic e500v2 
> area that Andy pointed out.

I believe , let this patch-set be applied in upstream. then during 
enabling debugging support of BSC9131 , i will enable for other SoC like 
P1020, P2020 etc.


Regards,
Prabhakar