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Diffstat (limited to 'board/logicpd/imx6/README')
| -rw-r--r-- | board/logicpd/imx6/README | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/board/logicpd/imx6/README b/board/logicpd/imx6/README index df43b55d6b..26d053a32c 100644 --- a/board/logicpd/imx6/README +++ b/board/logicpd/imx6/README @@ -22,8 +22,17 @@ To build U-Boot for the Dual and Quad variants: Flashing U-Boot into the SD card -------------------------------- +U-Boot is now building with SPL enabled which means there are two files to +load into the SD card. Make sure the card is formatted with at least two +partitions with the first partition being FAT32. First copy u-boot-dtb.img +to the first partition then burn SPL to the SD card with dd. +The SPL portion is programmed into a certain location for use by the internal +bootROM and it cannot be changed. The following instructions assume the SD +card is located as /dev/sdb. + + cp u-boot-dtb.img /dev/media/logic/boot + sudo dd if=SPL of=/dev/sdb bs=1k seek=1 oflag=sync status=none && sync -See README.imximage for details on booting from SD Flashing U-Boot into NAND ------------------------- @@ -32,6 +41,43 @@ with: kobs-ng init -v -x u-boot-dtb.imx + +Using Falcon Mode +----------------- +With Falcon Mode enabled, U-Boot can be bypassed by having SPL directly load +the kernel. The device tree, Kernel and boot args must first be configured, +and stored to a file on the micro SD card called 'args' +The kernel uImage is built with LOAD_ADDR=0x12000000 and the device tree is +assummed to be imx6q-logicpd.dtb. + +By default the mmcroot is set to the baseboard. + + # Establish bootargs + run mmcargs + + # Load Linux Kernel uImage + fatload mmc 1 $loadaddr uImage + + # Load Device Tree + run loadfdt + + # Setup the blob that will get passed to the kernel + spl export fdt ${loadaddr} - ${fdt_addr_r} + + # Note the starting and ending address of the updated device tree. + # for this example: + # Loading Device Tree to 1ffdf000, end 1fff038b ... OK + # Notice that 0x1fff038b - 1ffdf000 = 0x1138b + # now Add 1, so the length is 0x1138c. + + fatwrite mmc 1 0x1ffdf000 args 0x1138c + + # Reset the board and it will bypass U-Boot and SPL will directly boot + # the uImage + +To interrupt the boot sequence and force U-Boot to load, hold the 'c' button +while starting. + Additional Support Documentation can be found at: https://support.logicpd.com/ |