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Standalone boot (XELK)

239 bytes added, 11:52, 30 August 2019
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|-
|4.0.0
|July 2018Aug 2019
|[[Axel_Embedded_Linux_Kit_(XELK)#XELK_4.0.0|XELK 4.0.0]]
|XELK 4.0.0
|-
|}
 
== Introduction ==
This document has been written and tested with the software/hardware combination described in the history table above. However it contains general concept that can be adapted on any DAVE Embedded Systems' Linux platform using the SPL.
We'll explain how to program and configure a [[Category: AxelLite|Axel Lite]] to boot in standalone mode, without the need of a system microSD card or a NFS server, with two options:
* booting with NOR + NAND
** U-Boot will fetch Linux kernel binary images (kernel + device tree) from on-board NOR flash memory, while later the OS will mount the root file system from a NAND partition.
=> run load_spl
Using FEC device
TFTP from server 192.168.0.8289; our IP address is 192.168.0.83Filename 'xelk4axel/SPLxelk-4.spi0.0_mx6qdlaxel_spi_SPL'.
Load address: 0x12000000
Loading: ############
=> run load_uboot
Using FEC device
TFTP from server 192.168.0.8289; our IP address is 192.168.0.83Filename 'xelk4axel/uxelk-4.0.0_mx6qdlaxel_spi_u-boot.img.spi'.
Load address: 0x12000000
Loading: #################################################################
<pre class="board-terminal">
root@imx6dlxelk:~# kobs-ng -x -v -w MTD CONFIG: chip_0_device_path = "/dev/mtd0" chip_1_device_path = "(null)" search_exponent = 2 data_setup_time = 80 data_hold_time = 60 address_setup_time = 25 data_sample_time = 6 row_address_size = 3 column_address_size = 2 read_command_code1 = 0 read_command_code2 = 48 boot_stream_major_version = 1 boot_stream_minor_version = 0 boot_stream_sub_version = 0 ncb_version = 3 boot_stream_1_address = 0 boot_stream_2_address = xelk-4.0unable to create a temporary fileroot@imx6dlxelk:~# kobs-ng -x -v -w SPL.nand 0_mx6qdlaxel_nand_SPL
MTD CONFIG:
chip_0_device_path = "/dev/mtd0"
mtd: We write one page for save guard. *
root@imx6qxelk:~# flash_erase /dev/mtd1 0 0Erasing 128 Kibyte @ 5e0000 -- 100 % complete root@imx6dlxelk:~# nandwrite -p /dev/mtd1 uxelk-4.0.0_mx6qdlaxel_nand_u-boot.img.nand
Writing data to block 0 at offset 0x0
Writing data to block 1 at offset 0x20000
* Boot the system via SD or NFS as described into the [[XELK_Quick_Start_Guide|Quick_start_guide]]
* By default, the NAND is already partitioned to allow booting from NAND-only (see next section) and, thus, some partitions are reserved for U-boot and kernel images. Here we won't modify this default configuration. The [[Memory Tecnology Device (MTD)|MTD]] partitions can be dumped with <code>/proc/mtd</code> (the partition's name should be self-explanatory)
 
<pre class="board-terminal">
root@axel-liteimx6dlxelk:~# cat /proc/mtd
dev: size erasesize name
mtd0: 00800000 00200000 00020000 "nand-SPL"mtd1: 00600000 00020000 "nand-uboot"mtd1mtd2: 00100000 00020000 "nand-env1"mtd2mtd3: 00100000 00020000 "nand-env2"mtd3mtd4: 00100000 00020000 "nand-fdt"mtd4mtd5: 00100000 00020000 "nand-spare"mtd5mtd6: 00800000 00020000 "nand-kernel"mtd6mtd7: 00400000 00020000 "nand-splash"mtd7mtd8: 1e800000 00020000 "nand-ubi"mtd8mtd9: 00010000 00010000 "spi-SPL"mtd10: 00100000 000f0000 00010000 "spi-uboot"mtd9mtd11: 00040000 00010000 "spi-env1"mtd10mtd12: 00040000 00010000 "spi-env2"mtd11mtd13: 00080000 00010000 "spi-dtb"mtd12mtd14: 00600000 00800000 00010000 "spi-kernel"mtd13mtd15: 00400000 00010000 "spi-splash"mtd14mtd16: 01400000 01200000 00010000 "spi-free"root@axel-lite:~#
</pre>
* Format and initialize ''nand-ubi'' partition, which in our case is <code>mtd7mtd8</code>, using [[Memory Tecnology Device (MTD)#UBI|UBI]] with:
<pre>
ubiformat /dev/mtd7mtd8ubiattach -m 78
ubimkvol /dev/ubi0 -N rootfs -m
</pre>
<pre class="board-terminal">
root@axel-lite:~# ubiformat /dev/mtd7mtd8ubiformat: mtd7 mtd8 (nand), size 511705088 bytes (488.0 MiB), 3904 eraseblocks of 131072 bytes (128.0 KiB), min. I/O size 2048 bytes
libscan: scanning eraseblock 3903 -- 100 % complete
ubiformat: 3904 eraseblocks have valid erase counter, mean value is 31
ubiformat: formatting eraseblock 3903 -- 100 % complete
root@axel-lite:~# ubiattach -m 78[ 517.999286] UBI: attaching mtd7 mtd8 to ubi0
[ 524.468201] UBI: scanning is finished
[ 524.498833] UBI: attached mtd7 mtd8 (name "nand-ubi", size 488 MiB) to ubi0
[ 524.505476] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
[ 524.512290] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
<pre>
tar xvjf xelk-24.20.0_axel-fsl-image-qt5-xelk-l.tar.bz2 -C /mnt/nand
</pre>
<pre>
umount /mnt/nand/
ubidetach -m 78
</pre>
[ 575.115560] UBIFS: un-mount UBI device 0, volume 0
[ 575.120424] UBIFS: background thread "ubifs_bgt0_0" stops
root@axel-lite:~# ubidetach -m 78[ 575.171074] UBI: detaching mtd7 mtd8 from ubi0[ 575.182401] UBI: mtd7 mtd8 is detached from ubi0
root@axel-lite:~#
</pre>
<pre>
nand_args=setenv bootargs ubi.mtd=7 8 root=ubi0_0 rootfstype=ubifs rw
</pre>
 
'''Note:''' In Xelk-3.0.0 ''nand_args'' has been replaced by ''nandargs''
== Program boot images ==
<pre class="board-terminal">
U-Boot => sf probe; run loadk spi_updatek loadfdt spi_updatefdtSF: Detected S25FL256S s25fl256s_64k with page size 256 Bytes, erase size 64 KiB, total 32 MiB
Using FEC device
TFTP from server 192.168.0.1389; our IP address is 192.168.0.9883Filename 'axel/linux/xelk-24.30.1_uImage0_uImage'.
Load address: 0x12000000
Loading: #################################################################
#################################################################
#################################################################
################################################################# ################################################################# ################################################################# ### 1.6 3 MiB/s
done
Bytes transferred = 5887704 6668104 (59d6d8 65bf48 hex)SF: 8388608 bytes @ 0x200000 Erased: OKdevice 0 offset 0x200000, size 0x65bf48SF: 6668104 bytes @ 0x200000 Written: OK
Using FEC device
TFTP from server 192.168.0.1389; our IP address is 192.168.0.9883Filename 'axel/linux/xelk-24.30.1_imx6q-xelk0_imx6q-lsbcx-2.0.0cb0012.dtbdtb_wl'.
Load address: 0x18000000
Loading: ########### 1604.2 MiB5 KiB/s
done
Bytes transferred = 46326 51400 (b4f6 c8c8 hex)U-Boot >SF: 524288 bytes @ 0x180000 Erased: OKdevice 0 offset 0x180000, size 0xc8c8SF: 51400 bytes @ 0x180000 Written: OK </pre>
<pre class="board-terminal">
U-Boot => setenv bootcmd run spi_nandU-Boot => saveenv
</pre>
<pre>
=> print nand_updatek nand_updatefdt nand_loadk nand_loadfdt nand_nand
nand_updatek=nand erase.part nand-kernel; nand write ${loadaddr} nand-kernel ${filesize}
nand_updatefdt=nand erase.part nand-fdt; nand write ${fdtaddr} nand-fdt ${filesize}
 
nand_loadk=nand read ${loadaddr} nand-kernel
nand_loadfdt=nand read ${fdtaddr} nand-fdt
<pre class="board-terminal">
U-Boot => run loadk nand_updatek loadfdt nand_updatefdt
Using FEC device
TFTP from server 192.168.0.1389; our IP address is 192.168.0.9883Filename 'axel/linux/xelk-24.30.1_uImage0_uImage'.
Load address: 0x12000000
Loading: #################################################################
#################################################################
#################################################################
################################################################# ################################################################# ################################################################# ### 1.6 2 MiB/s
done
Bytes transferred = 5887704 6668104 (59d6d8 65bf48 hex)
NAND erase.part: device 0 offset 0xc00000, size 0x800000
size adjusted to 0x7e0000 (1 bad blocks)Skipping bad block at 0x00d600000x00d00000 Erasing at 0x13c0000 0x13e0000 -- 100% complete.
OK
NAND write: device 0 offset 0xc00000, size 0x59d6d80x65bf48Skip bad block 0x00d600000x00d00000 5887704 6668104 bytes written: OK
Using FEC device
TFTP from server 192.168.0.1389; our IP address is 192.168.0.9883Filename 'axel/linux/xelk-24.30.1_imx6q-xelk0_imx6q-lsbcx-2.0.0cb0012.dtb'.
Load address: 0x18000000
Loading: ########### 1726.3 MiB6 KiB/s
done
Bytes transferred = 46326 51400 (b4f6 c8c8 hex)
NAND erase.part: device 0 offset 0xa00000, size 0x100000
OK
NAND write: device 0 offset 0xa00000, size 0xb4f60xc8c8 46326 51400 bytes written: OKU-Boot =>
</pre>
<pre class="board-terminal">
U-Boot => setenv bootcmd run nand_nandU-Boot => saveenv
</pre>
U0007
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