AM625-Q1: where is the device tree node /reserved-memory/tfa@80000000 come from after system boot up

Hi Bert,

This tfa memory region is originally defined in the kernel devicetree:

https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi?h=10.00.07#n103

However, U-Boot might load TF-A to a different location, so U-Boot modifies this memory region in kernel devicetree using function ft_system_setup() below,

https://git.ti.com/cgit/ti-u-boot/ti-u-boot/tree/arch/arm/mach-k3/am625_fdt.c?h=10.00.07#n78

based on the value of CONFIG_K3_ATF_LOAD_ADDR which would be 0x80000000 defined in Kconfig:

https://git.ti.com/cgit/ti-u-boot/ti-u-boot/tree/arch/arm/mach-k3/Kconfig?h=10.00.07#n140