Older versions of U-Boot (e.g uboot-2009.08-lab126) handle DCD tables in a different manner than later versions. On Freescale/NXP SoC, peripheral and DRAM initialisation is handled using data structures known as DCD tables. This requires some additional customisation and configuration, depending on the U-Boot version. Imx_usb_loader is also capable of loading a U-Boot image and Linux kernel (and in theory, a rootfs) at the same time. Status failedThis error can be safely ignored and is explored in more detail in the "Loading a Linux binary" section. ![]() Loading binary file(./u-boot.bin) to 00980000, skip=0, fsize=1a1e4 type=aa HAB security state: development mode (0x56787856) Trying to open device vid=0x15a2 pid=0x0063 It is strongly recommended that developers create backups of the /dev/mmcblk0boot* sectors and transfer these backups to a safe location first. This method is semi-permanent, meaning that the device will always boot into SDP mode until a U-Boot build is reinstalled to the device. SDP as a SoC fallback method can be activated by erasing a small section at the beginning of the eMMC storage, which will intentionally break the bootloader. It may be possible to activate SDP directly from Linux by writing the required boot mode value directly to the required hardware register and executing a soft reset, but this has not been tested. On older devices, SDP mode can be activated by a special key sequence known as the "Magic Key".This test point has been observed on KT2, KT3, PW2 and PW3 and may exist on additional devices. On some devices, SDP mode can be activated by applying 3.3v to a test/manufacturing point on the PCB.This has been observed by users who have mistakenly erased the eMMC storage of their devices SDP mode will be activated by the SoC as a fallback if a functional bootloader is not found.SDP can be activated in at least 3 ways, depending on the device: SDP is likely used during the device manufacturing process to flash the initial firmware image and has also been utilised by the MobileRead community as part of the Kubrick recovery system. This is a low-level, built-in feature of the Freescale/NXP SoC used on Kindle devices that allows the user to load and execute arbitrary code via a USB connection. This how-to is applicable to Kindle devices that do not implement the Secure Boot feature of the SoC (i.e all devices up to and including KT3).Īlmost all Kindle devices support the use of Serial Download Protocol. SDP allows a developer to test that binaries function as expected without needing to flash them to eMMC storage, which reduces the risk of bricking the test device and extends the life of the eMMC storage by avoiding unnecessary write cycles. and 37: ◊ 5.4.2.This how-to covers the process of booting stock or self compiled U-Boot and Linux binaries over USB using Serial Download Protocol.and 31: during the build process, but will.and 29: the following commands (the example.and 25: tcp_wrappers-devel 7.6-48 tcp_wrapp. ![]() ![]() and 17: -d Specifies the root directory of.and 15: To avoid confusion with the host OS.Unpacking the Source Code The DENX U-Boot and Linux Guide (DULG) for canyonlands 1 Configuration of a BOOTP / DHCP Server ♦ 4.8. Format of the cpkgs.lst and tpkgs.lst Files ♦ 3.11. Setting Up ELDK Build Environment ◊ 3.10.3. Rebuilding the ELDK from Scratch ◊ 3.10.1. Mounting Target Components via NFS ♦ 3.8. Switching Between Multiple Installations ♦ 3.7. Removal of the Entire Installation ♦ 3.6. Installation and Removal of Individual Packages ◊ 3.5.5. The DENX U-Boot and Linux Guide (DULG) for canyonlands Table of contents:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |