Wiren Board 5: Build an image to download in USB Mass-Storage mode/en: различия между версиями
(Новая страница: «== Building Linux ==») |
(Новая страница: «* To get the kernel sources from git,'' <nowiki> $ git clone https://github.com/contactless/linux.git $ cd linux $ git checkout dev/v4.1.15 </nowiki> * Download…») |
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== Building Linux == | == Building Linux == | ||
* | * To get the kernel sources from git,'' | ||
<nowiki> | <nowiki> | ||
$ git clone https://github.com/contactless/linux.git | $ git clone https://github.com/contactless/linux.git | ||
$ cd linux | $ cd linux | ||
$ git checkout dev/v4.1.15 </nowiki> | $ git checkout dev/v4.1.15 </nowiki> | ||
* | * Download initramfs from [https://github.com/contactless/wirenboard/tree/master/initramfs_usbgadget repository] and unzip | ||
<nowiki> | <nowiki> | ||
$ unzip initramfs_usbgadget.zip | $ unzip initramfs_usbgadget.zip | ||
$ sudo tar xvf initramfs_usbgadget.tar</nowiki> | $ sudo tar xvf initramfs_usbgadget.tar</nowiki> | ||
* | * Initialize the environment to build the kernel. If necessary, change the ''DT'' and ''CROSS_COMPILE'' variables in this file | ||
<nowiki> | <nowiki> | ||
$ . ./scripts/kbuild-env.sh | $ . ./scripts/kbuild-env.sh | ||
$ set +e</nowiki> | $ set +e</nowiki> | ||
* | * Set the config of the kernel | ||
<nowiki>$ make mxs_usbgadget_defconfig</nowiki> | <nowiki>$ make mxs_usbgadget_defconfig</nowiki> | ||
* | * Build the kernel and modules by installing them in unpacked initramfs | ||
<nowiki>$ INSTALL_MOD_PATH=./initramfs_usbgadget/ ./scripts/kbuild.sh</nowiki> | <nowiki>$ INSTALL_MOD_PATH=./initramfs_usbgadget/ ./scripts/kbuild.sh</nowiki> | ||
* | * Build kernel with appended DTB and initramfs | ||
<nowiki>$ ./scripts/kbuild-dtb.sh</nowiki> | <nowiki>$ ./scripts/kbuild-dtb.sh</nowiki> | ||
Версия 19:28, 31 мая 2019
This manual describes how to build bootstream to boot Linux from USB Mass Storage Gadget. In this case, the contents of the SD-card becomes available via USB as a normal USB flash drive.
The structure of the bootstream:
- U-Boot SPL - primary boot loader performs initial initialization
- U-Boot - the boot loader itself, runs Linux
- The Linux kernel image consists of several parts
- zImage - kernel
- initramfs - file system with modules to support USB gadget, is included in zImage
- DTB - nformation about the periphery required for the kernel to work. Is appended to the end of the zImage, CONFIG_ARM_APPENDED_DTB option should be enabled in the config
Building Linux
- To get the kernel sources from git,
$ git clone https://github.com/contactless/linux.git $ cd linux $ git checkout dev/v4.1.15
- Download initramfs from repository and unzip
$ unzip initramfs_usbgadget.zip $ sudo tar xvf initramfs_usbgadget.tar
- Initialize the environment to build the kernel. If necessary, change the DT and CROSS_COMPILE variables in this file
$ . ./scripts/kbuild-env.sh $ set +e
- Set the config of the kernel
$ make mxs_usbgadget_defconfig
- Build the kernel and modules by installing them in unpacked initramfs
$ INSTALL_MOD_PATH=./initramfs_usbgadget/ ./scripts/kbuild.sh
- Build kernel with appended DTB and initramfs
$ ./scripts/kbuild-dtb.sh
Сборка U-Boot
- Получить исходники U-Boot из git. Нужна ветка wb_v2015.07
$ cd .. $ git clone https://github.com/contactless/u-boot.git $ cd u-boot $ git checkout wb_v2015.07
- Задать конфиг U-Boot
$ make mx28_wirenboard5_usbgadget_defconfig
- Скопировать ранее собранный образ [[Special:MyLanguage/kernel+initramfs]+DTB] в директорию U-Boot
$ cp ../linux/zImage-imx28-evk ./zImage
- Собрать совмещенный образ [U-Boot+[[kernel+initramfs]+DTB|kernel+initramfs]+DTB] в директорию U-Boot
$ cp ../linux/zImage-imx28-evk ./zImage
- Собрать совмещенный образ [U-Boot+[[kernel+initramfs]+DTB]], пригодный для загрузки по USB (bootstream)
$ CROSS_COMPILE='arm-linux-gnueabi-' make -j4 u-boot.sb
Сборка mxsldr
Эта утилита нужна для загрузки полученного образа по USB. Требуется установленная библиотека libusb-1.0 (apt-get install libusb-1.0-0-dev)
$ cd .. $ git clone http://git.denx.de/mxsldr.git $ cd mxsldr $ make
Загрузка собранного образа с помощью mxsldr
$ ./mxsldr ../u-boot/u-boot.sb