Re: [PATCH v14 3/6] arm64: dts: imx8ulp-evk: add nxp secure enclave firmware

[Frank Li <Frank.li@nxp.com>]

On Thu, Mar 27, 2025 at 12:07:59AM +0530, Pankaj Gupta wrote:
> Add support for NXP secure enclave called EdgeLock Enclave
> firmware (se-fw) for imx8ulp-evk.
>
> EdgeLock Enclave has a hardware limitation of restricted access to DDR
> address: 0x80000000 to 0xafffffff, so reserve 1MB of DDR memory region
> from 0x80000000.
>
> Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
> ---
> changes from v13 to v14
> - added the blank line.
> - removed the lines: #address-cells = <1>; , #size-cells = <0>;
> - moved the ele-reserved under the parent node "reserved-memory".
> - rename the node name "ele-reserved" to general name "memory".
> ---
>  arch/arm64/boot/dts/freescale/imx8ulp-evk.dts | 12 +++++++++++-
>  arch/arm64/boot/dts/freescale/imx8ulp.dtsi    | 11 +++++++++--
>  2 files changed, 20 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
> index 290a49bea2f7..10aaf02f8ea7 100644
> --- a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts

Shawn require board dts and chip dts are two patches.

Frank

> @@ -1,6 +1,6 @@
>  // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>  /*
> - * Copyright 2021 NXP
> + * Copyright 2021, 2025 NXP
>   */
>
>  /dts-v1/;
> @@ -37,6 +37,12 @@ linux,cma {
>  			linux,cma-default;
>  		};
>
> +		ele_reserved: memory@90000000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0 0x90000000 0 0x100000>;
> +			no-map;
> +		};
> +
>  		m33_reserved: noncacheable-section@a8600000 {
>  			reg = <0 0xa8600000 0 0x1000000>;
>  			no-map;
> @@ -259,6 +265,10 @@ &usdhc0 {
>  	status = "okay";
>  };
>
> +&hsm0 {
> +	memory-region = <&ele_reserved>;
> +};
> +
>  &fec {
>  	pinctrl-names = "default", "sleep";
>  	pinctrl-0 = <&pinctrl_enet>;
> diff --git a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
> index 2562a35286c2..05db47668b7e 100644
> --- a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
> @@ -1,6 +1,6 @@
>  // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>  /*
> - * Copyright 2021 NXP
> + * Copyright 2021, 2025 NXP
>   */
>
>  #include <dt-bindings/clock/imx8ulp-clock.h>
> @@ -154,7 +154,7 @@ sosc: clock-sosc {
>  		#clock-cells = <0>;
>  	};
>
> -	sram@2201f000 {
> +	sram0: sram@2201f000 {
>  		compatible = "mmio-sram";
>  		reg = <0x0 0x2201f000 0x0 0x1000>;
>
> @@ -186,6 +186,13 @@ scmi_sensor: protocol@15 {
>  				#thermal-sensor-cells = <1>;
>  			};
>  		};
> +
> +		hsm0: secure-enclave {
> +			 compatible = "fsl,imx8ulp-se-ele-hsm";
> +			 mbox-names = "tx", "rx";
> +			 mboxes = <&s4muap 0 0>, <&s4muap 1 0>;
> +			 sram = <&sram0>;
> +		 };
>  	};
>
>  	cm33: remoteproc-cm33 {
>
> --
> 2.43.0
>