Voipac at 09:28, 23 October 2021

2021-10-23T09:28:00Z

Voipac at 05:48, 26 April 2021

2021-04-26T05:48:23Z

Voipac at 08:14, 22 April 2021

2021-04-22T08:14:28Z

Voipac: Created page with "Category:i.MX25 SODIMM PC - Development kit
TOC
i.MX25 SODIMM PC - Development kit uses Barebox as a bootloader. This page disp..."

2021-04-22T08:10:28Z

Created page with "Category:i.MX25 SODIMM PC - Development kit  <div style="float:right">__TOC__</div> i.MX25 SODIMM PC - Development kit uses Barebox as a bootloader. This page disp..."

New page

[[Category:i.MX25 SODIMM PC - Development kit]]

<div style="float:right">__TOC__</div>
i.MX25 SODIMM PC - Development kit uses Barebox as a bootloader. This page displays how to configure and build it.<br /><br />

Barebox is a bootloader responsible for hardware initialization, loading and booting Linux kernel. It is also used for module flashing.

== Barebox 2017.12.0 ==

=== Set toolchain ===
Export [[i.MX25_SODIMM_PC_Toolchain|toolchain variables]] for every related terminal session.

=== Download and extract source code ===
<syntaxhighlight lang="bash">
mkdir -pv ~/workdir/vmx/bootloader/
cd ~/workdir/vmx/bootloader/
git clone https://github.com/voipac/barebox.git barebox-voipac
cd barebox-voipac
git checkout barebox-v2017.12.0
</syntaxhighlight>

=== Compile ===
Output file is stored as images/barebox-voipac-vmx25.img
<syntaxhighlight lang="bash">
cd ~/workdir/vmx/bootloader/barebox-voipac
#make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- menuconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- imx_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j8
</syntaxhighlight>

=== Configuring bootloader environment ===
==== DTB file selection ====
As different module configurations use altered device trees, defining the correct board variant is important. Correct ''global.vmx.model'' variable is set based on these options:
* "254" for Basic configuration
* "264" for Pro configuration
* "265" for Max configuration
<syntaxhighlight lang="bash">
barebox@Voipac VMX25:/ edit env/config-board
#!/bin/sh

# board defaults, do not change in running system. Change /env/config
# instead

global vmx
global vmx.model
global vmx.kernelno
global vmx.kernel
global vmx.dtb

#global.vmx.model=254
#global.vmx.model=264
global.vmx.model=265
global.vmx.dtb=imx25-voipac-vmx25-${global.vmx.model}.dtb

global.hostname=vmx25
global.linux.bootargs.base="console=ttymxc0,115200"
global.boot.default=nand-ubi
</syntaxhighlight>

The Barebox environment should be saved afterwards to apply the changes:
<syntaxhighlight lang="bash">
barebox@Voipac VMX25:/ saveenv
</syntaxhighlight>

== Barebox 2014.03.0 ==
=== Set toolchain ===
Export [[i.MX25_SODIMM_PC_Toolchain|toolchain variables]] for every related terminal session.

=== Set shell variables ===
<syntaxhighlight lang="bash">
BB_VERSION=2014.03.0
SW_VERSION=20151129
</syntaxhighlight>

=== Download and extract source code ===
<syntaxhighlight lang="bash">
mkdir -pv ~/workdir/vmx/bootloader/
cd ~/workdir/vmx/bootloader/
wget http://barebox.org/download/barebox-${BB_VERSION}.tar.bz2
tar xvjf barebox-${BB_VERSION}.tar.bz2
mv barebox-${BB_VERSION} barebox-${BB_VERSION}.orig
cp -rv barebox-${BB_VERSION}.orig barebox-${BB_VERSION}.work
</syntaxhighlight>

=== Download and apply Voipac patches ===
<syntaxhighlight lang="bash">
cd ~/workdir/vmx/bootloader/
wget http://downloads.voipac.com/files/i.MX25_SODIMM_PC-Development_kit/module/software/barebox/sources/barebox-${BB_VERSION}_vmx25_${SW_VERSION}.cfg
wget http://downloads.voipac.com/files/i.MX25_SODIMM_PC-Development_kit/module/software/barebox/sources/barebox-${BB_VERSION}_vmx25_${SW_VERSION}.patch
cd ~/workdir/vmx/bootloader/barebox-${BB_VERSION}.work
patch -p1 < ../barebox-${BB_VERSION}_vmx25_${SW_VERSION}.patch
cp ../barebox-${BB_VERSION}_vmx25_${SW_VERSION}.cfg .config
</syntaxhighlight>

=== Compile ===
Output file is stored in arch/arm/pbl/zbarebox.bin:
<syntaxhighlight lang="bash">
cd ~/workdir/vmx/bootloader/barebox-${BB_VERSION}.work
#make ARCH=arm menuconfig
make -j4
</syntaxhighlight>

=== Configuring bootloader environment ===
==== Edit boot options ====

Barebox provides 4 boot configurations by default:
* nand-legacy-ubi
** Load kernel (nand - kernel)
** Attach rootfs (nand - rootfs)
* nand-dtb-ubi
** Load kernel (nand - kernel)
** Load device tree (nand - bareboxenv)
** Attach rootfs (nand - rootfs)
* net-legacy
** Load kernel (tftp)
** Attach rootfs (nfs)
* net-dtb
** Load kernel (tftp)
** Load device tree (tftp)
** Attach rootfs (nfs)
<br />
Boot configuration files support custom kernel definition. These settings also allow updating paths or names for binaries:
<syntaxhighlight lang="bash">
barebox@Voipac VMX25:/ edit /env/boot/net-legacy
</syntaxhighlight>

<syntaxhighlight lang="bash">
barebox@Voipac VMX25:/ edit /env/config

# list of boot entries. These are executed in order until one
# succeeds. An entry can be:
# - a filename in /env/boot/
# - a full path to a directory. All files in this directory are
# treated as boot files and executed in alphabetical order
global.boot.default=nand-legacy-ubi
</syntaxhighlight>

=== DTB file selection ===
As different module configurations use altered device trees, defining the correct board variant is important:
<syntaxhighlight lang="bash">
barebox@Voipac VMX25:/ edit /env/config
...
# BASIC=254, PRO=264, MAX=265
#global.vmxmodel=254
#global.vmxmodel=264
#global.vmxmodel=265
...
barebox@Voipac VMX25:/ saveenv
barebox@Voipac VMX25:/ reset
</syntaxhighlight>

@@ Line 1: / Line 1: @@
-[[Category:i.MX25 SODIMM PC - Development kit]]
+[[Category:i.MX25 SODIMM PC - Development Kit]]
 [[Category:Barebox]]
 <!-- -->
 <div style="float:right">__TOC__</div>
-i.MX25 SODIMM PC - Development kit uses Barebox as a bootloader. This page displays how to configure and build it.<br /><br />
+i.MX25 SODIMM PC - Development Kit uses Barebox as a bootloader. This page displays how to configure and build it.<br /><br />
 Barebox is a bootloader responsible for hardware initialization, loading and booting Linux kernel. It is also used for module flashing.

@@ Line 31: / Line 31: @@
 === Configuring bootloader environment ===
 ==== DTB file selection ====
-As different module configurations use altered device trees, defining the correct board variant is important. Correct ''global.vmx.model'' variable is set based on these options:
+As different module configurations use altered device trees, defining the actual board variant is important. The correct ''global.vmx.model'' variable is set based on these options:
 * "254" for Basic configuration
 * "264" for Pro configuration

i.MX25 SODIMM PC Barebox - Revision history

Voipac at 09:28, 23 October 2021

Voipac at 05:48, 26 April 2021

Voipac at 08:14, 22 April 2021

Voipac: Created page with "Category:i.MX25 SODIMM PC - Development kit __TOC__ i.MX25 SODIMM PC - Development kit uses Barebox as a bootloader. This page disp..."

Voipac: Created page with "Category:i.MX25 SODIMM PC - Development kit
TOC
i.MX25 SODIMM PC - Development kit uses Barebox as a bootloader. This page disp..."