projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| d7c11502 VM |
1 | How to use and build U-Boot on mx6sabreauto |
| 2 | ------------------------------------------- | |
| 3 | ||
| 4 | mx6sabreauto_defconfig target supports mx6q/mx6dl/mx6qp sabreauto variants. | |
| 5 | ||
| 6 | In order to build it: | |
| 7 | ||
| 8 | $ make mx6sabreauto_defconfig | |
| 9 | ||
| 10 | $ make | |
| 11 | ||
| 12 | This will generate the SPL and u-boot.img binaries. | |
| 13 | ||
| 14 | - Flash the SPL binary into the SD card: | |
| 15 | ||
| 16 | $ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync | |
| 17 | ||
| 18 | - Flash the u-boot.img binary into the SD card: | |
| 19 | ||
| 20 | $ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 && sync | |
| 07f6ddb6 DD |
21 | |
| 22 | Booting via Falcon mode | |
| 23 | ----------------------- | |
| 24 | ||
| 25 | Write in mx6sabreauto_defconfig the following define below: | |
| 26 | ||
| 27 | CONFIG_SPL_OS_BOOT=y | |
| 28 | ||
| 29 | In order to build it: | |
| 30 | ||
| 31 | $ make mx6sabreauto_defconfig | |
| 32 | ||
| 33 | $ make | |
| 34 | ||
| 35 | This will generate the SPL image called SPL and the u-boot.img. | |
| 36 | ||
| 37 | - Flash the SPL image into the SD card: | |
| 38 | ||
| 39 | $ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 && sync | |
| 40 | ||
| 41 | - Flash the u-boot.img image into the SD card: | |
| 42 | ||
| 43 | $ sudo dd if=u-boot.img of=/dev/sdb bs=1K seek=69 && sync | |
| 44 | ||
| 45 | Create a FAT16 boot partition to store uImage and the dtb file, then copy the files there: | |
| 46 | ||
| 47 | $ sudo cp uImage /media/boot | |
| 48 | ||
| 49 | $ sudo cp imx6dl-sabreauto.dtb /media/boot | |
| 50 | ||
| 51 | Create a partition for root file system and extract it there: | |
| 52 | ||
| 53 | $ sudo tar xvf rootfs.tar.gz -C /media/root | |
| 54 | ||
| 55 | The SD card must have enough space for raw "args" and "kernel". | |
| 56 | To configure Falcon mode for the first time, on U-Boot do the following commands: | |
| 57 | ||
| 58 | - Load dtb file from boot partition: | |
| 59 | ||
| 60 | # load mmc 0:1 ${fdt_addr} imx6dl-sabreauto.dtb | |
| 61 | ||
| 62 | - Load kernel image from boot partition: | |
| 63 | ||
| 64 | # load mmc 0:1 ${loadaddr} uImage | |
| 65 | ||
| 66 | - Write kernel at 2MB offset: | |
| 67 | ||
| 68 | # mmc write ${loadaddr} 0x1000 0x4000 | |
| 69 | ||
| 70 | - Setup kernel bootargs: | |
| 71 | ||
| 72 | # setenv bootargs "console=ttymxc3,115200 root=/dev/mmcblk0p1 rootfstype=ext4 rootwait quiet rw" | |
| 73 | ||
| 74 | - Prepare args: | |
| 75 | ||
| 76 | # spl export fdt ${loadaddr} - ${fdt_addr} | |
| 77 | ||
| 78 | - Write args 1MB data (0x800 sectors) to 1MB offset (0x800 sectors) | |
| 79 | ||
| 80 | # mmc write 18000000 0x800 0x800 | |
| 81 | ||
| 82 | - Restart the board and then SPL binary will launch the kernel directly. |