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 <[email protected]> > --- > 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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