1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556 |
- Summary
- =======
- The source for omap3logic.c encompases the OMAP35 and DM3730 SOM-LV and DM3730 Torpedo platforms, but there are device trees custom taylored to each board.
- omap3_logic_defconfig = DM37 Torpedo / Torpedo + Wireless
- omap35_logic_defconfig = OMAP35 Torpedo
- omap3_logic_somlv_defconfig = DM37 SOM-LV
- omap35_logic_somlv_defconfig = OMAP35 SOM-LV
- The device tree included with each of the defconfig files will also direct the board as to which dtb file to load when loading the kernel, so it is not
- recomended to mix and match the defconfig files.
- Falcon Mode: FAT SD cards
- =========================
- In this case the additional file is written to the filesystem. In this
- example we assume that the uImage and device tree to be used are already on
- the FAT filesystem (only the uImage MUST be for this to function
- afterwards) along with a Falcon Mode aware MLO and the FAT partition has
- already been created and marked bootable:
- U-Boot # mmc rescan
- # Load kernel and device tree into memory, perform export
- U-Boot # fatload mmc 0 ${loadaddr} uImage
- U-Boot # run loadfdt
- U-Boot # setenv optargs quiet
- U-Boot # run mmcargs
- U-Boot # run common_bootargs
- U-Boot # spl export fdt ${loadaddr} - ${fdtaddr}
- This will print a number of lines and then end with something like:
- Loading Device Tree to 8dec9000, end 8dee0295 ... OK
- So then note the starting address and write the args to mmc/sd:
- U-Boot # fatwrite mmc 0:1 0x8dec9000 args 0x20000
- The size of 0x20000 matches the CMD_SPL_WRITE_SIZE.
- Falcon Mode: NAND
- =================
- In this case the additional data is written to another partition of the
- NAND. In this example we assume that the uImage and device tree to be are
- already located on the NAND somewhere (such as filesystem or mtd partition)
- along with a Falcon Mode aware MLO written to the correct locations for
- booting and mtdparts have been configured correctly for the board:
- U-Boot # nand read ${loadaddr} kernel
- U-Boot # load nand rootfs ${fdtaddr} /boot/am335x-evm.dtb
- U-Boot # run nandargs
- U-Boot # run common_bootargs
- U-Boot # spl export fdt ${loadaddr} - ${fdtaddr}
- U-Boot # nand erase.part u-boot-spl-os
- U-Boot # nand write ${fdtaddr} u-boot-spl-os
|