dts/common/nordic/nrf91xx_partition.dtsi

/*
 * Copyright 2024 Embeint Inc
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Default memory partitioning for nRF91 devices.
 */

&flash0 {
	/*
	 * Default Flash planning for nRF91 series SoCs.
	 * This layout matches (by necessity) that in the TF-M repository:
	 *
	 * 0x0000_0000 BL2 - MCUBoot (64 KB)
	 * 0x0001_0000 Primary image area (448 KB):
	 *    0x0001_0000 Secure     image primary (256 KB)
	 *    0x0005_0000 Non-secure image primary (192 KB)
	 * 0x0008_0000 Secondary image area (448 KB):
	 *    0x0008_0000 Secure     image secondary (256 KB)
	 *    0x000c_0000 Non-secure image secondary (192 KB)
	 * 0x000f_0000 Protected Storage Area (16 KB)
	 * 0x000f_4000 Internal Trusted Storage Area (8 KB)
	 * 0x000f_6000 OTP / NV counters area (8 KB)
	 * 0x000f_8000 Non-secure storage, used when built with NRF_NS_STORAGE=ON,
	 *             otherwise unused (32 KB)
	 */
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x00000000 0x10000>;
		};
		slot0_partition: partition@10000 {
			label = "image-0";
			reg = <0x00010000 0x40000>;
		};
		slot0_ns_partition: partition@50000 {
			label = "image-0-nonsecure";
			reg = <0x00050000 0x30000>;
		};
		slot1_partition: partition@80000 {
			label = "image-1";
			reg = <0x00080000 0x40000>;
		};
		slot1_ns_partition: partition@c0000 {
			label = "image-1-nonsecure";
			reg = <0x000c0000 0x30000>;
		};
		tfm_ps_partition: partition@f0000 {
			label = "tfm-ps";
			reg = <0x000f0000 0x00004000>;
		};
		tfm_its_partition: partition@f4000 {
			label = "tfm-its";
			reg = <0x000f4000 0x00002000>;
		};
		tfm_otp_partition: partition@f6000 {
			label = "tfm-otp";
			reg = <0x000f6000 0x00002000>;
		};
		storage_partition: partition@f8000 {
			label = "storage";
			reg = <0x000f8000 0x00008000>;
		};
	};
};

/ {
	/*
	 * Default SRAM planning when building for nRF91xx with
	 * ARM TrustZone-M support
	 * - Lowest 88 kB SRAM allocated to Secure image (sram0_s).
	 * - Upper 168 kB SRAM allocated to Non-Secure image (sram0_ns).
	 * Of the memory allocated to the Non-Secure image
	 * - 40 kB SRAM reserved for and used by the modem library (sram0_ns_modem).
	 * - 128 kB allocated to the application (sram0_ns_app).
	 */
	reserved-memory {
		#address-cells = <1>;
		#size-cells = <1>;
		ranges;

		sram0_s: image_s@20000000 {
			/* Secure image memory */
			reg = <0x20000000 DT_SIZE_K(88)>;
		};

		sram0_ns: image_ns@20016000 {
			/* Non-Secure image memory */
			reg = <0x20016000 DT_SIZE_K(168)>;
		};

		sram0_ns_modem: image_ns_modem@20016000 {
			/* Modem (shared) memory */
			reg = <0x20016000 DT_SIZE_K(40)>;
		};

		sram0_ns_app: image_ns_app@20020000 {
			/* Non-Secure application memory */
			reg = <0x20020000 DT_SIZE_K(128)>;
		};
	};
};