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

[Tom Rini]

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.

-- 
Tom
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