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Wed, 12 Aug 2026 01:36:44 +0000 Received: from KL1PR02MB4977.apcprd02.prod.outlook.com ([fe80::9fdf:2557:8351:6c03]) by KL1PR02MB4977.apcprd02.prod.outlook.com ([fe80::9fdf:2557:8351:6c03%4]) with mapi id 15.21.0315.012; Wed, 12 Aug 2026 01:36:43 +0000 From: Bin Meng To: QEMU Cc: Bin Meng , Jean-Christophe Dubois , Peter Maydell , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Pierrick Bouvier , qemu-arm@nongnu.org, qemu-block@nongnu.org Subject: [PATCH 00/10] hw/arm: Enable U-Boot boot on MCIMX6UL-EVK Date: Wed, 12 Aug 2026 09:36:03 +0800 Message-ID: <20260812013619.2134092-1-bin.meng@processmission.com> X-Mailer: git-send-email 2.53.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: DU6P191CA0007.EURP191.PROD.OUTLOOK.COM (2603:10a6:10:540::22) To KL1PR02MB4977.apcprd02.prod.outlook.com (2603:1096:820:71::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: KL1PR02MB4977:EE_|KUXPR02MB9309:EE_ X-MS-Office365-Filtering-Correlation-Id: 43cd3c56-dcdd-4765-5fc6-08def8122a31 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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envelope-from=bin.meng@processmission.com; helo=SEYPR02CU001.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org The mcimx6ul-evk machine can boot Linux directly, but it cannot run the U-Boot proper produced by Buildroot far enough to load a kernel from its SD card. Early U-Boot boot test accesses currently abort or observe placeholder values, and the i.MX uSDHC model exposes several issues. This series lets an unmodified Buildroot 2026.05 U-Boot 2024.07 image run on mcimx6ul-evk, load zImage and imx6ul-14x14-evk.dtb from USDHC2, start Linux, mount the SD card root file system, and reach the Buildroot login prompt. It also documents and tests the existing direct Linux boot path. Patches 1 through 4 provide the minimum early-firmware-visible state. Patches 5 through 8 address i.MX uSDHC behavior needed by U-Boot. The last two patches document both boot paths and add functional tests for U-Boot and direct Linux boot. Bin Meng (10): hw/arm: fsl-imx6ul: Add SCU compatibility window hw/misc: imx6ul_ccm: Update PMU_MISC0 reset value hw/arm: fsl-imx6ul: Map early firmware register placeholders hw/arm: fsl-imx6ul: Add a minimal MMDC geometry model hw/sd: sdhci: Use a QEMU-local no-busy IRQ quirk bit hw/sd: sdhci: Honor i.MX uSDHC vendor clock gates hw/sd: sdhci: Preserve uSDHC status enables for U-Boot hw/sd: sdhci: Skip SDMA boundary stops for i.MX uSDHC docs/system/arm: Document MCIMX6UL-EVK Buildroot boot tests/functional/arm: Add MCIMX6UL-EVK boot tests MAINTAINERS | 1 + docs/system/arm/mcimx6ul-evk.rst | 67 +++++++++++++++++ hw/arm/fsl-imx6ul.c | 87 +++++++++++++++++++++- hw/arm/mcimx6ul-evk.c | 2 + hw/misc/imx6ul_ccm.c | 2 +- hw/sd/sdhci.c | 89 +++++++++++++++++++---- include/hw/arm/fsl-imx6ul.h | 2 + include/hw/sd/sdhci.h | 15 +++- tests/functional/arm/meson.build | 2 + tests/functional/arm/test_mcimx6ul_evk.py | 70 ++++++++++++++++++ 10 files changed, 315 insertions(+), 22 deletions(-) create mode 100644 tests/functional/arm/test_mcimx6ul_evk.py --- base-commit: e8d693e12af9cbb89d724baadfcc08559669e279 branch: imx6ul-evk -- 2.53.0