On 8/16/21 3:25 PM, Clément Léger wrote:
Loading U-Boot after OP-TEE requires to move the base address of the DRAM and reduce its size. Indeed, OP-TEE will be loaded at start of DRAM for these platforms and this DRAM will be secured and thus not accessible to U-Boot.
Currently, addresses are hardcoded in board configs. This series adds memory property when missing to existing device tree and modify init code to fetch DRAM size from devicetree. This will allow to modify only the device tree to reduce DRAM when needed.
Memory addresses have been chosen to have a 32Mb hole at the start of DRAM which allows to put OP-TEE and necessary exchange memory zones.
Changes in v2:
- Move memory node from sama5d2.dtsi to at91-sama5d2_xplained.dts
Clément Léger (5): board: sama5d27_som1_ek: Get dram size and base from device tree board: sama5d27_som1_ek: Modify load addresses ARM: dts: at91: sama5d2_xplained: Add memory node in devicetree board: sama5d2_xplained: Get dram size and base from device tree board: sama5d2_xplained: Modify load addresses
arch/arm/dts/at91-sama5d2_xplained.dts | 4 ++++ .../atmel/sama5d27_som1_ek/sama5d27_som1_ek.c | 12 ++++++---- .../atmel/sama5d2_xplained/sama5d2_xplained.c | 11 +++++---- include/configs/sama5d27_som1_ek.h | 12 ++++------ include/configs/sama5d2_xplained.h | 24 ++++++++----------- 5 files changed, 33 insertions(+), 30 deletions(-)
-- 2.32.0
Applied series to u-boot-atmel/next , thanks !