[PATCH v4 2/3] arm64: dts: ti: k3-am64-main: Reserve OCMRAM for DMSC-lite and secure proxy communication

[Suman Anna]

On 6/15/21 12:43 PM, Aswath Govindraju wrote:
> The final 128KB in SRAM is reserved by default for DMSC-lite code and
> secure proxy communication buffer. The memory region used for DMSC-lite
> code can be optionally freed up by secure firmware API[1]. However, the
> buffer for secure proxy communication is not configurable. This default
> hardware configuration is unique for AM64.
> 
> Therefore, indicate the area reserved for DMSC-lite code and secure proxy
> communication buffer in the oc_sram device tree node.
> 
> [1] - http://downloads.ti.com/tisci/esd/latest/6_topic_user_guides/security_handover.html#triggering-security-handover
> 
> Signed-off-by: Aswath Govindraju <a-govindraju at ti.com>

Reviewed-by: Suman Anna <s-anna at ti.com>

> ---
>  arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
> index 693fe24e7f7a..6a883f4349cb 100644
> --- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
> @@ -27,6 +27,14 @@
>  		tfa-sram at 0 {
>  			reg = <0x0 0x1c000>;
>  		};
> +
> +		dmsc-sram at 1e0000 {
> +			reg = <0x1e0000 0x1c000>;
> +		};
> +
> +		sproxy-sram at 1fc000 {
> +			reg = <0x1fc000 0x4000>;
> +		};
>  	};
>  
>  	main_conf: syscon at 43000000 {
>