Re: [PATCH 6/6] arm: mach-k3: Move DRAM address of ATF for AM62/AM62a

[Bryan Brattlof <bb@ti.com>]

On February 14, 2024 thus sayeth Andrew Davis:
> The current address of TF-A in DRAM is just below the 512MB address line.
> This means if the DRAM in a system is 512MB then TF-A is right at the
> end of memory which is often reused, for instance U-Boot relocates itself
> here. If a system has less than 512MB then that system wouldn't work at
> all as TF-A would fail to load.
> 
> To avoid the issues above, move TF-A to the start of DRAM, which doesn't
> change from system to system.
> 
> As TF-A is position independent, this has no dependency on TF-A. We
> also fixup DT as needed when TF-A address is moved, so this change also
> has no dependency on Linux and is fully forward/backward compatible.
> 
> Signed-off-by: Andrew Davis <afd@ti.com>

Acked-by: Bryan Brattlof <bb@ti.com>

Thanks for this! This will make adding SIP support much easier.

~Bryan

> ---
>  arch/arm/mach-k3/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
> index 55bb874d9aa..33f20f61f83 100644
> --- a/arch/arm/mach-k3/Kconfig
> +++ b/arch/arm/mach-k3/Kconfig
> @@ -123,7 +123,7 @@ config SYS_K3_SPL_ATF
>  
>  config K3_ATF_LOAD_ADDR
>  	hex "Load address of ATF image"
> -	default 0x9e780000 if (SOC_K3_AM625 || SOC_K3_AM62A7)
> +	default 0x80000000 if (SOC_K3_AM625 || SOC_K3_AM62A7)
>  	default 0x70000000
>  	help
>  	  The load address for the ATF image. This value is used to build the
> -- 
> 2.39.2
>