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How to Boot Linux From SD Card

To boot Linux from SD Card, users should put the kernel image and dtb file along with a file system located on the SD Card.

Generate the Filesystem for SD Card Boot

For users want to use run ramboot_emmc boot method, do the following commands to prepare the ramdisk filesystem file.

$ bitbake adsp-sc5xx-ramdisk

For users want to use run sdcardboot boot method, ADI provides two kinds of images to allow users to boot from SD Card using sdcardboot boot command.

  • adsp-sc5xx-full
  • adsp-sc5xx-minimal

The minimal image is a subset of the full image which has less packages than full image. There is no difference for the Linux kernel in the minimal and full image.

Run “bitbake <TARGET>” to generate the images you want.

$ bitbake adsp-sc5xx-full


$ bitbake adspsc5xx-minimal

If you want to compile and deploy the images at your second time, run the command “bitbake <TARGET> -C compile”.

If you want to add packages to filesystem, you could add package to IMAGE_INSTALL_append = “<PACKAGE_NAME>“ in build/conf/local.conf file.

SD Card Set Up

Formatting the SD Card

In order to use an SD Card with Linux we need to prepare it by formatting it in the correct format. This section of instructions requires you to correctly identify the SD Card and format the card. If you select the wrong drive you may cause irreversible damage to you Host PC. To format the SD Card, follow the commands below. The example code in this section assumes that the SD Card device is reported to be /dev/sdb. Ensure that you change these commands to use your device.

$ sudo fdisk /dev/sdb
/* Create primary partition 1, 256M size*/
Command (m for help): n
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-3887103, default 2048): PRESS ENTER
Last sector, +sectors or +size{K,M,G} (2048-3887103, default 3887103): PRESS ENTER

/* Save partition */
Command (m for help): w

Format the SD card to EXT filesystem

$ sudo mkfs.ext2 /dev/sdb1

Writing the file system to the SD Card

Next, we need to copy the Linux file system and kernel image to the SD Card. We install this on to the SD Card by mounting the file system on to the local Host PC and copying the contents on to the SD Card.

$ sudo mkfs.ext2 /dev/sdb1 
$ sudo mount -t ext2 /dev/sdb1 /mnt

For users want to use run ramboot_emmc boot method, users copy the following files into SD card.

$ sudo cp build/tmp/deploy/images/<MACHINE>/<RAMDISK_FILE> /mnt/boot/ramdisk.cpio.xz.u-boot
$ sudo cp build/tmp/deploy/images/<MACHINE>/<DTB_FILE> /mnt/boot/
$ sudo cp build/tmp/deploy/images/<MACHINE>/zImage /mnt/boot/
$ sudo umount /mnt

For users want to use run sdcardboot boot method, users copy the following files into SD card.

$ sudo tar -xf build/tmp/deploy/images/<MACHINE>/<FULL/MINIMAL_FS_IMAGE> -C /mnt
$ sudo cp build/tmp/deploy/images/<MACHINE>/<DTB_FILE> /mnt/boot/
$ sudo cp build/tmp/deploy/images/<MACHINE>/zImage /mnt/boot/
$ sudo umount /mnt

The file system and kernel image are now installed on to the SD Card. The SD Card can now be safely removed from the Host PC.

Booting Linux From SD Card

Insert the SD card to target board, and reset the board and enter into U-Boot

U-Boot 2015.01 ADI-YOCTO-1.0.0 (May 14 2020 - 19:26:23)

CPU:   ADSP ADSP-SC589-0.1 (Detected Rev: 1.1) (spi flash boot)
VCO: 450 MHz, Cclk0: 450 MHz, Sclk0: 112.500 MHz, Sclk1: 112.500 MHz, DCLK: 450 MHz
OCLK: 150 MHz
       Watchdog enabled
I2C:   ready
DRAM:  224 MiB
MMC:   SC5XX SDH: 0                                                                                                        
SF: Detected IS25LP512 with page size 256 Bytes, erase size 64 KiB, total 64 MiB                                           
In:    serial                                                                                                              
Out:   serial                                                                                                              
Err:   serial                                                                                                              
other init                                                                                                                 
Net:   dwmac.3100c000                                                                                                      
Hit any key to stop autoboot:  0                                                                                           
sc # run sdcardboot
sc # run ramboot_emmc

The linux kernel would then boot up and the file system stored in SD card.

Starting syslogd/klogd: done
 * Starting Avahi mDNS/DNS-SD Daemon: avahi-daemon

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     @@@@@@@@  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@

        Analog Devices Yocto Distribution
adsp-sc589-mini login: root
Password: adi

The default username is root and the password is adi.

Appendix: Macro Definition

adsp-sc589-mini sc589-mini.dtb adsp-sc5xx-full-adsp-sc589-mini.tar.xz adsp-sc5xx-minimal-adsp-sc589-mini.tar.xz adsp-sc5xx-ramdisk-adsp-sc589-mini.cpio.xz.u-boot
adsp-sc589-ezkit sc589-ezkit.dtb adsp-sc5xx-full-adsp-sc589-ezkit.tar.xz adsp-sc5xx-minimal-adsp-sc589-ezkit.tar.xz adsp-sc5xx-ramdisk-adsp-sc589-ezkit.cpio.xz.u-boot
adsp-sc584-ezkit sc584-ezkit.dtb adsp-sc5xx-full-adsp-sc584-ezkit.tar.xz adsp-sc5xx-minimal-adsp-sc584-ezkit.tar.xz adsp-sc5xx-ramdisk-adsp-sc584-ezkit.cpio.xz.u-boot
adsp-sc573-ezkit sc573-ezkit.dtb adsp-sc5xx-full-adsp-sc573-ezkit.tar.xz adsp-sc5xx-minimal-adsp-sc573-ezkit.tar.xz adsp-sc5xx-ramdisk-adsp-sc573-ezkit.cpio.xz.u-boot

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resources/tools-software/linuxdsp/docs/quickstartguide/installing/installing_sdcardboot.1605259024.txt.gz · Last modified: 13 Nov 2020 10:17 by jian chen