cros/dts/flashmap-16mb-sandbox-rw.dtsi

// SPDX-License-Identifier: GPL-2.0+
/*
 * Read/write flash map for a 16MB SPI flash
 *
 * Copyright 2018 Google LLC
 */

/ {
	binman {
		/*
		 * Note: rw-a and rw-b are used by auto-update. They must be
		 * the same size, and must include the vblock, boot and
		 * firmware-id parts within them. There is no check on this
		 * at present so you need to manually verify that it is
		 * correct.
		 *
		 * The rw-b section must not overlap/include the rw-vpd
		 * section.
		 */

		/* ---- Section: Rewritable slot A ---- */
		read-write-a {
			u-boot,dm-pre-reloc;
			type = "section";
			label-prefix = "rw-a-";
			block-offset = /bits/ 64 <0x00004400>;
			vblock {
				align = <0x1000>;
				align-size = <0x1000>;
				u-boot,dm-pre-reloc;
				/*
				 * Alignment: 4k (for updating) and must be in
				 * start of each RW_SECTION
				 */
				size = <0x2000>;
				content = <&rw_a_spl>;
				keyblock = "firmware.keyblock";
				signprivate = "firmware_data_key.vbprivk";
				version = <1>;
				kernelkey = "kernel_subkey.vbpubk";
				preamble-flags = <0>;
			};
			rw_a_spl: u-boot-spl {
				u-boot,dm-pre-reloc;
				type = "u-boot-spl-elf";
				compress = "lzma";
				strip;
			};
			u-boot {
				u-boot,dm-pre-reloc;
				type = "u-boot-elf";
				compress = "lzma";
				hash {
					u-boot,dm-pre-reloc;
					algo = "sha256";
				};
			};
			cros-ec-rw {
				align-size = <0x1000>;
				compress = "lzma";
				hash {
					u-boot,dm-pre-reloc;
					algo = "sha256";
				};
			};
			firmware-id {
				/* Alignment: no requirement */
				size = <0x100>;
				type = "text";
				text-label = "frid";
			};
		};

		/* ---- Section: Rewritable slot B ---- */
		read-write-b {
			u-boot,dm-pre-reloc;
			type = "section";
			label-prefix = "rw-b-";
			align = <0x100000>;
			block-offset = /bits/ 64 <0x00084400>;

			vblock {
				type = "fill";
				align = <0x1000>;
				align-size = <0x1000>;
				u-boot,dm-pre-reloc;
				/*
				 * Alignment: 4k (for updating) and must be in
				 * start of each RW_SECTION
				 */
				size = <0x2000>;
				content = <&rw_b_dtb>;
				keyblock = "firmware.keyblock";
				signprivate = "firmware_data_key.vbprivk";
				version = <1>;
				kernelkey = "kernel_subkey.vbpubk";
				preamble-flags = <0>;
			};
			rw_b_dtb: u-boot-dtb {
			};
			cros-ec-rw {
				align-size = <0x1000>;
				hash {
					u-boot,dm-pre-reloc;
					algo = "sha256";
				};
			};
			firmware-id {
				/* Alignment: no requirement */
				size = <0x100>;
				type = "text";
				text-label = "frid";
			};
		};

		/* ---- Section: Rewritable VPD 32 KB ---- */
		read-write-vpd {
			type = "section";
			rw-vpd {
				/* Alignment: 4k (for updating) */
				size = <0x00008000>;
				type = "fill";
				fill-value = [ff];
			};
		};

		/* ---- Section: Rewritable shared 16 KB---- */
		shared-section {
			type = "section";
			/* Anything in this range may be updated in recovery */
			size = <0x4000>;
			shared-data {
				label = "shared-data";
				/*
				 * Alignment: 4k (for random read/write).
				 * RW firmware can put calibration data here
				 */
				size = <0x00004000>;
				type = "fill";
				fill-value = [00];
			};
		};

		/* ---- Section: Rewritable private 16 KB---- */
		rw-private {
			type = "section";
			size = <0x00014000>;
			rw-environment {
				label = "rw-environment";
				/*
				 * Alignment: 4k, and must occupy bottom of
				 * U-Boot firmware -- check CONFIG_ENV_OFFSET
				 */
				size = <0x00004000>;

				/*
				 * We could put the dev environment here, but
				 * U-Boot has a default built in. Devs can
				 * 'saveenv' to set this up.
				 */
				type = "fill";
				fill-value = [00];
			};
			recovery-mrc-cache {
				size = <0x10000>;
				type = "fill";
				fill-value = [ff];
			};
		};
	};
};