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This page explains how to manually update the U-Boot binaries on an SD Card.
When you have access to the device (with the card reader of a PC, or the UMS command on a target), the 3 first partitions on the SDCard are:
See Boot_chains_overview, for the bootloader definitions.
You can use the Linux dd command to copy the FSBL and SSBL directly to the correct partition:
dd if=<file> of=/dev/<dev> conv=fdatasync
<dev> is:
where <X> is the ID of the device, and <n> the ID of the partition.
Note: the dd option conv=fdatasync is used to force synchronous copying.
The internal card reader is /dev/mmcblk0, partition <n> is /dev/mmcblk0p<n>:
dd if=tf-a.stm32 of=/dev/mmcblk0p1 conv=fdatasync dd if=tf-a.stm32 of=/dev/mmcblk0p2 conv=fdatasync dd if=u-boot.stm32 of=/dev/mmcblk0p3 conv=fdatasync
The USB card reader is /dev/sdb, partition <n> is /dev/sdb<n>
dd if=u-boot-spl.stm32 of=/dev/sdb1 conv=fdatasync dd if=u-boot-spl.stm32 of=/dev/sdb2 conv=fdatasync dd if=u-boot.img of=/dev/sdb3 conv=fdatasync
<noinclude> {{ArticleMainWriter | PatrickD}} {{ArticleApprovedVersion | PatrickD | PatriceC | No previous approved version | PhilipS - 05Nov'18 | 5Nov'18}} [[Category:How_ to_run_use_cases populate boards]]</noinclude> This page explains how to manually update the [[U-Boot_overview|U-Boot]] binaries on an SD Card. == Copying a binary to an SD card with the Linux dd command == When you have access to the device (with the card reader of a PC, or the [[How to use USB mass storage in U-Boot|UMS command]] on a target), [[STM32MP15_Flash_mapping#SD_card_memory_mapping|the 3 first partitions on the SDCard]] are: # FSBL1 # FSBL2 # SSBL See [[Boot_chains_overview]], for the bootloader definitions. You can use the Linux dd command to copy the FSBL and SSBL directly to the correct partition: {{PC$}} dd if=<file> of=/dev/<dev> conv=fdatasync <dev> is: * mmcblk<X>p<n> : PC-embedded card reader case * sd<X><N> : USB-connected SD card reader case where <X> is the ID of the device, and <n> the ID of the partition. Note: the dd option conv=fdatasync is used to force synchronous copying. == Trusted boot chain update example == The internal card reader is /dev/mmcblk0, partition <n> is /dev/mmcblk0p<n>: {{PC$}} dd if=tf-a.stm32 of=/dev/mmcblk0p1 conv=fdatasync {{PC$}} dd if=tf-a.stm32 of=/dev/mmcblk0p2 conv=fdatasync {{PC$}} dd if=u-boot.stm32 of=/dev/mmcblk0p3 conv=fdatasync == Basic boot chain udpate example == The USB card reader is /dev/sdb, partition <n> is /dev/sdb<n> {{PC$}} dd if=u-boot-spl.stm32 of=/dev/sdb1 conv=fdatasync {{PC$}} dd if=u-boot-spl.stm32 of=/dev/sdb2 conv=fdatasync {{PC$}} dd if=u-boot.img of=/dev/sdb3 conv=fdatasync
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