[PATCH] xilinx: mbv: Update stack, heap, and OpenSBI memory

[Michal Simek]

On 2/18/26 15:12, Tom Rini wrote:
> On Wed, Feb 18, 2026 at 12:03:15PM +0530, Padmarao Begari wrote:
> 
>> A 2 MB region of DDR memory is allocated for U‑Boot SPL, with the
>> heap starting at address 0x80000000 and the stack at 0x80200000.
>> However, U‑Boot fails when using OpenSBI v1.8 because OpenSBI begins
>> execution at 0x80100000, causing an overlap between the SPL stack
>> and the malloc region.
>> To resolve this conflict, the SPL heap and stack are moved to
>> higher memory addresses, and OpenSBI is relocated to 0x80000000.
>> The SPL heap now starts at 0x8C000000, and the stack is placed
>> at 0x8F000000. The MB-V requires at least 256MB of DDR to run U-Boot.
>>
>> 	_________________
>> 	|		|0x8FFFFFFF
>> 	|_______________|
>> 	|  SPL- Stack	|0x8F000000
>> 	|		|
>>      	|		|
>> 	|  SPL - Heap	|
>> 	|_______________|0x8C000000
>> 	|		|
>> 	|		|
>> 	| Full U-Boot	|
>> 	|_______________|0x81200000
>> 	|Load FIT Image |
>> 	|_______________|0x80200000
>> 	|   OpenSBI     |
>> 	|_______________|0x80000000
>>
>> Signed-off-by: Padmarao Begari <padmarao.begari at amd.com>
>> ---
>>   configs/xilinx_mbv32_defconfig       | 4 ++--
>>   configs/xilinx_mbv32_smode_defconfig | 2 +-
>>   configs/xilinx_mbv64_smode_defconfig | 2 +-
>>   3 files changed, 4 insertions(+), 4 deletions(-)
> 
> As general feedback, this is something that ought to be in doc/board/
> somewhere too. One such existing example is doc/board/ti/am62x_sk.rst
> and follow-up patches are fine.

Just curious. Memory layout is something what every platform has to deal with.
Don't we have any script for it?

Thanks,
Michal