Changes between Version 5 and Version 6 of uboot

Timestamp:

04/19/2024 09:29:33 PM (3 weeks ago)

Author:

Tim Harvey

Comment:

add additional comments to installation of split media

uboot

@@ -780 +780 @@
  * https://github.com/Gateworks/u-boot-imx6/blob/gateworks_v2015.04/doc/README.NetConsole
 
+
+[=#split]
 == Installing Large Disk Images on Systems with Limited RAM
 
@@ -785 +787 @@
 
 === Spliting the Disk Image Into Segments
-Before proceeding with the update process, the disk image needs to be split into smaller parts. This can be achieved using the Linux's split command, making sure to decompress the image if it's compressed. The key requirement for the process outlined here is that the file must be divided into segments that are evenly divisible by 512-byte blocks. This ensures that the subsequent calculation of block count, as demonstrated in the script in the following section.  Here are the steps to split our BSP disk image as an example:
+Before proceeding with the update process, the disk image needs to be split into smaller parts. This can be achieved using the Linux {{{split}}} command, making sure to decompress the image if it's compressed. The key requirement for the process outlined here is that the file must be divided into segments that are evenly divisible by 512-byte blocks (so any multiple of KB or MB is fine). This ensures that the subsequent calculation of block count, as demonstrated in the script in the following section. Here are the steps to split our BSP disk image as an example:
 {{{#!bash
 # If the image is compressed, extract it first
 gunzip jammy-venice.img.gz
 
-# Split the image into parts of 500MB each
+# Split the image into parts of 500MB each named 'jammy-venice.img.part<x>'
 split -d -b 500M jammy-venice.img jammy-venice.img.part
 }}}
@@ -827 +829 @@
             setexpr offset ${offset} + ${blkcnt}
             setexpr i ${i} + 1
-            setexpr rem ${i} % 0x10
-            itest ${rem} -eq 0x0a && setexpr i ${i} + 6
+            # setexpr results in a hex number so convert to dec
+            setexpr rem ${i} % 0x10; itest ${rem} -eq 0x0a && setexpr i ${i} + 6
         else
             echo "Error writing segment ${i} of ${filesize} bytes"
@@ -844 +846 @@
 }}}
 
-U-Boot requires scripts to be in a specific binary format for execution. To compile the script into this format, we use the mkimage tool, which is provided as part of the U-Boot distribution.
+U-Boot requires scripts to be in a specific binary format for execution with the {{{source}}} command. To compile the script into this format, we use the mkimage tool, which is provided as part of the U-Boot distribution.
 {{{#!bash
 mkimage -A arm64 -T script -C none -d storage_split_update ustorage_split_update
@@ -853 +855 @@
 {{{#!bash
 cp storage_split_update your_tftp_server
-
 cp jammy-venice.img.part* your_tftp_server
 }}}
@@ -874 +875 @@
 {{{#!bash
 #mmc dev <device#> <hardware_partition#>
+# hardware partition: 0=user 1=boot0 2=boot1
+u-boot=> mmc list # show mmc devs
 u-boot=> mmc dev 2 0
 u-boot=> setenv iface mmc
@@ -880 +883 @@
 {{{#!bash
 #usb dev <device#> <hardware_partition#>
-u-boot=> usb stop && usb start && usb storage
+u-boot=> usb stop && usb start && usb storage # scan and show storage devs
 u-boot=> usb dev 0 0
 u-boot=> setenv iface usb
 }}}
+**For SATA:
+{{{#!bash
+#sata dev <device#>
+u-boot=> sata init && sata device # scan and show storage devs
+u-boot=> sata dev 0
+u-boot=> setenv iface sata
+}}}
 **For NVMe:
 {{{#!bash
 #nvme dev <device#>
-u-boot=> pci enum && nvme scan
+u-boot=> pci enum && nvme scan && nvme info # scan and show storage devs
 u-boot=> nvme dev 0
 u-boot=> setenv iface nvme