[PATCH v2] xilinx: zynqmp: Do not use 0 as spl bss start address

[Stefan Herbrechtsmeier]

Hi Michal,

what is the default entry address for the aft / bl31.bin?

I have a bl31.bin with an entry address of 0x1000 and this is inside the 
BSS.

Regards
   Stefan

Am 07.06.2022 um 10:13 schrieb Michal Simek:
> út 7. 6. 2022 v 9:44 odesílatel Stefan Herbrechtsmeier
> <stefan.herbrechtsmeier-oss at weidmueller.com> napsal:
>>
>> From: Stefan Herbrechtsmeier <stefan.herbrechtsmeier at weidmueller.com>
>>
>> Do not use 0 as address for memory because of the special meaning for
>> pointers (null pointer). Change the spl bss start address to the second
>> page.
>>
>> Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier at weidmueller.com>
>>
>> ---
>> The problem was discovered with a static array initialized with zero.
>> The compiler placed the array at address 0 and thereby a pointer to the
>> array was interpreted as null pointer.
>>
>> Changes in v2:
>> - Rework commit message and replace address null by 0
>>
>>   include/configs/xilinx_zynqmp.h | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/include/configs/xilinx_zynqmp.h b/include/configs/xilinx_zynqmp.h
>> index f25d796a1e..21a5cf1617 100644
>> --- a/include/configs/xilinx_zynqmp.h
>> +++ b/include/configs/xilinx_zynqmp.h
>> @@ -209,7 +209,7 @@
>>   #define CONFIG_SPL_MAX_SIZE            0x40000
>>
>>   /* Just random location in OCM */
>> -#define CONFIG_SPL_BSS_START_ADDR      0x0
>> +#define CONFIG_SPL_BSS_START_ADDR      0x1000
>>   #define CONFIG_SPL_BSS_MAX_SIZE                0x80000
>>
>>   #if defined(CONFIG_SPL_SPI_FLASH_SUPPORT)
>> --
>> 2.30.2
>>
> 
> Applied.
> M
>