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@ -1,56 +1,47 @@ |
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How to use and build U-Boot on mx6sabresd: |
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Currently there are four methods for booting mx6sabresd boards: |
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How to use and build U-Boot on mx6sabresd |
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1. Booting from SD card via normal U-Boot (u-boot.imx) |
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The following methods can be used for booting mx6sabresd boards: |
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2. Booting from eMMC via normal U-Boot |
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1. Booting from SD card |
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3. Booting via SPL (SPL and u-boot.img) |
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2. Booting from eMMC |
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4. Booting via Falcon mode (SPL launches the kernel directly) |
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3. Booting via Falcon mode (SPL launches the kernel directly) |
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1. Booting from SD card via normal U-Boot |
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----------------------------------------- |
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1. Booting from SD card via SPL |
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------------------------------- |
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$ make mx6qsabresd_defconfig (If you want to build for mx6qsabresd) |
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mx6sabresd_defconfig target supports mx6q/mx6dl/mx6qp sabresd variants. |
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or |
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In order to build it: |
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$ make mx6dlsabresd_defconfig (If you want to build for mx6dlsabresd) |
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$ make mx6sabresd_defconfig |
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$ make |
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This will generate the image called u-boot.imx. |
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This will generate the SPL and u-boot.img binaries. |
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- Flash the u-boot.imx binary into the SD card: |
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- Flash the SPL binary into the SD card: |
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$ sudo dd if=u-boot.imx of=/dev/sdb bs=1K seek=1 && sync |
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$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync |
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- Flash the u-boot.img binary into the SD card: |
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2. Booting from eMMC via normal U-Boot |
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-------------------------------------- |
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$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 && sync |
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$ make mx6qsabresd_defconfig (If you want to build for mx6qsabresd) |
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or |
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2. Booting from eMMC |
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-------------------- |
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$ make mx6dlsabresd_defconfig (If you want to build for mx6dlsabresd) |
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$ make mx6sabresd_defconfig |
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$ make |
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This will generate the image called u-boot.imx. |
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- Flash the u-boot.imx binary into the eMMC: |
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Set SW6 to download mode: 00001100 |
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This will generate the SPL and u-boot.img binaries. |
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Plug a usb cable to USB-OTG and load the u-boot image using the imx_usb_loader |
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tool (https://github.com/boundarydevices/imx_usb_loader): |
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$ sudo ./imx_usb u-boot.imx |
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- Boot first from SD card as shown in the previous section |
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In U-boot change the eMMC partition config: |
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@ -60,48 +51,29 @@ Mount the eMMC in the host PC: |
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=> ums 0 mmc 2 |
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Flash the u-boot.imx binary |
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- Flash SPL and u-boot.img binaries into the eMMC: |
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$ sudo dd if=u-boot.imx of=/dev/sdX bs=1K seek=1 && sync |
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$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync |
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$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 && sync |
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Set SW6 to eMMC 8-bit boot: 11010110 |
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3. Booting via SPL |
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------------------ |
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Other method for building U-Boot on mx6qsabresd and mx6qpsabresd is |
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through SPL. In order to do so: |
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$ make mx6sabresd_spl_defconfig |
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$ make |
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This will generate the SPL image called SPL and the u-boot.img. |
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- Flash the SPL image into the SD card: |
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$ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 && sync |
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- Flash the u-boot.img image into the SD card: |
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$ sudo dd if=u-boot.img of=/dev/sdbbs=1K seek=69 && sync |
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4. Booting via Falcon mode |
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3. Booting via Falcon mode |
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-------------------------- |
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$ make mx6sabresd_spl_defconfig |
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$ make mx6sabresd_defconfig |
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$ make |
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This will generate the SPL image called SPL and the u-boot.img. |
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- Flash the SPL image into the SD card: |
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$ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 oflag=sync status=none && sync |
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$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 oflag=sync status=none && sync |
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- Flash the u-boot.img image into the SD card: |
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$ sudo dd if=u-boot.img of=/dev/sdbbs=1K seek=69 oflag=sync status=none && sync |
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$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 oflag=sync status=none && sync |
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Create a partition for root file system and extract it there: |
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