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GET /api/1.2/patches/2230923/?format=api
{ "id": 2230923, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2230923/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/71a675d6947a679b73b422c708231e01837e1b4c.1777536451.git.simona.toaca@nxp.com/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/1.2/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<71a675d6947a679b73b422c708231e01837e1b4c.1777536451.git.simona.toaca@nxp.com>", "list_archive_url": null, "date": "2026-04-30T08:33:33", "name": "[v4,4/4] doc: board: nxp: Add Quickboot documentation", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "65414116b8fb9d65867bf6874e4ff8cda15ecb3a", "submitter": { "id": 92829, "url": "http://patchwork.ozlabs.org/api/1.2/people/92829/?format=api", "name": "Simona Toaca (OSS)", "email": "simona.toaca@oss.nxp.com" }, "delegate": { "id": 151988, "url": "http://patchwork.ozlabs.org/api/1.2/users/151988/?format=api", "username": "festevam", "first_name": "Fabio", "last_name": "Estevam", "email": "festevam@gmail.com" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/71a675d6947a679b73b422c708231e01837e1b4c.1777536451.git.simona.toaca@nxp.com/mbox/", "series": [ { "id": 502232, "url": "http://patchwork.ozlabs.org/api/1.2/series/502232/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=502232", "date": "2026-04-30T08:33:29", "name": "imx9{4,5,52}: Add Quickboot support", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/502232/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230923/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230923/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com\n header.a=rsa-sha256 header.s=selector1-NXP1-onmicrosoft-com\n header.b=wvXLj8k3;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=85.214.62.61; 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mx.microsoft.com 1; spf=pass\n smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com;\n dkim=pass header.d=oss.nxp.com; arc=none", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com;\n s=selector1-NXP1-onmicrosoft-com;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=Qm3MNfvxF7jzA1wHDFI5jFgFJmPL0omqjkCdrhId/8k=;\n b=wvXLj8k3r+xcSdj4+mZ/qBPsu+/fNVB0/sK9P2INHzOw+dKOcK8lYICxgQfZNFqFoez3oaV+nNmb2WxehnMY69cfaQY9fyhmBWLHHB/rml1vehWRCNVWh3gssu3lM0MTBSiyazIIPK2V3SWvCUlhjWDmZWLuyLzlnQm9WbuJaVzb6PJflli3SZka4z5Ir0/FiNa+MQeCe94Txx8XQ+3eNCHgqSSxzX7NOt40s+4++zlLcJm6sFdI4H6LsfOMzUXbuV4gugZFT0e5iaOunCzU0IhcAHLtKkPueNkE8/7zftjzWltxSsNxDjkKa7mWxAeKdIyDkUsXsJ2OliCkfu7Akg==", "From": "\"Simona Toaca (OSS)\" <simona.toaca@oss.nxp.com>", "To": "uboot-imx@nxp.com,\n\tu-boot@lists.denx.de", "Cc": "Stefano Babic <sbabic@nabladev.com>, festevam@gmail.com, peng.fan@nxp.com,\n alice.guo@nxp.com, ye.li@nxp.com, simona.toaca@nxp.com,\n viorel.suman@nxp.com, fedor.ross@ifm.com, marex@nabladev.com,\n joao.goncalves@toradex.com, ravi@prevas.dk, ping.bai@nxp.com,\n ji.luo@nxp.com, qijian.guo@nxp.com", "Subject": "[PATCH v4 4/4] doc: board: nxp: Add Quickboot documentation", "Date": "Thu, 30 Apr 2026 11:33:33 +0300", "Message-ID": "\n <71a675d6947a679b73b422c708231e01837e1b4c.1777536451.git.simona.toaca@nxp.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<cover.1777536451.git.simona.toaca@nxp.com>", "References": "<cover.1777536451.git.simona.toaca@nxp.com>", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "AM9P250CA0022.EURP250.PROD.OUTLOOK.COM\n (2603:10a6:20b:21c::27) To VI0PR04MB11917.eurprd04.prod.outlook.com\n (2603:10a6:800:306::9)", "MIME-Version": "1.0", "X-MS-Exchange-MessageSentRepresentingType": "1", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "VI0PR04MB11917:EE_|DB8PR04MB7036:EE_", "X-MS-Office365-Filtering-Correlation-Id": "7625d4a1-f390-4d2a-a89a-08dea691bbea", "X-MS-Exchange-SharedMailbox-RoutingAgent-Processed": "True", "X-LD-Processed": "686ea1d3-bc2b-4c6f-a92c-d99c5c301635,ExtAddr", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;\n ARA:13230040|366016|1800799024|19092799006|376014|18002099003|56012099003|22082099003;", "X-Microsoft-Antispam-Message-Info": "\n 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", "X-Forefront-Antispam-Report": "CIP:255.255.255.255; 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SPDX-License-Identifier: GPL-2.0+\n+ Copyright 2026 NXP\n+\n+DDR QuickBoot flow\n+------------------\n+\n+Some NXP SoCs (which use OEI - iMX943, iMX95, iMX952 etc.) support saving\n+DDR training data (collected by OEI during Training flow) from volatile\n+to non-volatile memory, which is then available to OEI at next cold reboot.\n+OEI uses the saved data to run Quickboot flow and avoid training the DDR again.\n+This significantly reduces the boot time.\n+\n+The location of the quickboot data in NVM is a space left in the bootloader by\n+mkimage, with the size of 64K. The qb command searches for this space to\n+save the data. Thus, the NVM should also be a boot device and contain\n+the bootloader at the time of the saving.\n+\n+U-Boot provides no authentication for quickboot data, only its integrity\n+is verified via the CRC32. The authentication is done in OEI. With\n+the exception of iMX95 A0/A1, which use CRC32 as well for verifying\n+the data, the rest of the SoCs use ELE to verify the MAC stored\n+in the ddrphy_qb_state structure.\n+\n+If the quickboot data in memory is not valid (CRC32 check fails),\n+U-Boot does not save it to NVM. So, if OEI runs Quickboot flow -> no\n+data is written to volatile memory -> invalid data -> no saving happens\n+(qb save fails during qb check).\n+\n+After successful saving, U-Boot clears the data in volatile memory so\n+that qb check fails at next reboot and the NVM isn't accessed again.\n+\n+There are 2 ways to save this data, both can be enabled:\n+\n+1. automatically, in SPL (by enabling CONFIG_SPL_IMX_QB)\n+\n+- this will save the data on the current boot device (e.g. SD)\n+- other configs specific to the boot device need to be enabled (CONFIG_SPL_MMC_WRITE for saving to eMMC/SD)\n+- use for: automating qb save / saving quickboot data if using Falcon mode (skipping U-Boot proper)\n+\n+2. using qb command in U-Boot console (by enabling CONFIG_CMD_IMX_QB)\n+\n+- supports saving on the current boot device, or on another, specified device.\n+- supports specifying the hwpartition for eMMC (for booting from boot0/boot1)\n+- if flashing via uuu, the command can be added in an uuu script (boot device needs to be specified)\n+- use 'qb erase' to force DDR re-training\n+- use for: saving quickboot data during flashing / controlling the NVM to save to / forcing re-training\n+\n+::\n+\n+ # To save/erase on current boot device\n+ # For eMMC boot1, mmc 0:2 has to be specified explicitly\n+ => qb save/erase\n+\n+ # To save/erase on other boot device\n+ => qb save/erase mmc 0 # eMMC boot0\n+ => qb save/erase mmc 0:1 # eMMC boot0\n+ => qb save/erase mmc 0:2 # eMMC boot1\n+ => qb save/erase mmc 1 # SD\n+ => qb save/erase spi # NOR SPI\n", "prefixes": [ "v4", "4/4" ] }