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

[Scott Wood <scottwood@freescale.com>]

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.

-Scott