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Created page with '== How to cross compile the linux kernel == Embedded Linux is the use of a Linux operating system in embedded computer systems such as mobile phones, personal digital assistant…'
== How to cross compile the linux kernel ==
Embedded Linux is the use of a Linux operating system in embedded computer systems such as mobile phones, personal digital assistants, media players, set-top boxes, and other consumer electronics devices, networking equipment, machine control, industrial automation, navigation equipment and medical instruments.
Unlike desktop and server versions of Linux, embedded versions of Linux are designed for devices with relatively limited resources, such as cell phones and set-top boxes. Due to concerns such as cost and size, embedded devices usually have much less RAM and secondary storage than desktop computers, and are likely to use flash memory instead of a hard drive. Since embedded devices serve specific rather than general purposes, developers optimize their embedded Linux distributions to target specific hardware configurations and usage situations. These optimizations can include reducing the number of device drivers and software applications, and modifying the Linux kernel to be a real-time operating system.
=== Overview of How-To ===
This How-To is meant to be a starting point for people to learn build a kernel image for IGEP v2 devices as quickly and easily as possible.
This How-To works with the Ubuntu 8.04 IGEP v2.0 SDK Virtual Machine but most of the contents are valid also for other GNU/Linux distributions. We do not issue any guarantee that this will work on other distributions.
=== Requirements ===
*'''Ubuntu 8.04 IGEP v2.0 SDK Virtual Machine'''
=== Supported kernels ===
First of all setup the build environment sourcing this script
<pre>$ source /usr/local/poky/eabi-glibc/arm/environment-setup
</pre>
or
<pre>$ source /usr/local/poky/eabi-glibc/environment-setup-arm-none-linux-gnueabi
</pre>
if you have updated your SDK environment to latest version (see [[Ubuntu804IGEPv20SDKVirtualMachine|Ubuntu 8.04 IGEP v2.0 SDK Virtual Machine]])
=== Kernel image for IGEP v2 ===
==== Linux OMAP v2.6.33 series (stable) ====
Latest stable kernel version is: '''2.6.33.4-0 (20100517)'''
{| border="1"
|-
! '''Sources'''
! '''uImage binary'''
! '''Modules binaries'''
|-
| [http://downloads.igep.es/sources/linux-omap-2.6.33.4-0.tar.gz 2.6.33.4-0] ([http://downloads.igep.es/sources/linux-omap-2.6.33.4-0.tar.gz.md5 md5sum])
| [http://downloads.igep.es/binaries/kernel/v2.6.33.4-0/uImage-2.6.33.4-0.bin uImage-2.6.33.4-0.bin] ([http://downloads.igep.es/binaries/kernel/v2.6.33.4-0/uImage-2.6.33.4-0.bin.md5 md5sum])
| [http://downloads.igep.es/binaries/kernel/v2.6.33.4-0/linux-omap-modules-2.6.33.4-0.tar.gz modules-2.6.33.4-0] ([http://downloads.igep.es/binaries/kernel/v2.6.33.4-0/linux-omap-modules-2.6.33.4-0.tar.gz.md5 md5sum)]
|}
Download the IGEP v2 Linux kernel sources and follow next steps:
<pre>$ wget http://www.downloads.igep.es/sources/linux-omap-2.6.33.tar.gz
$ tar xzf linux-omap-2.6.33.tar.gz
$ cd [kernel version]
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- igep0020_defconfig
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage modules
</pre>
The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules_install INSTALL_MOD_PATH=[path to your target rootfs]
</pre>
==== Linux OMAP v2.6.28 series (stable) ====
Latest stable kernel version is: '''2.6.28.10-3 (20100318)'''
{| border="1" class="simple"
|-
! '''Sources'''
! '''uImage binary'''
! '''Modules binaries'''
|-
| [http://downloads.igep.es/sources/linux-omap-2.6.28.10-3.tar.gz 2.6.28.10-3] ([http://downloads.igep.es/sources/linux-omap-2.6.28.10-3.tar.gz.md5 md5sum])
| [http://downloads.igep.es/binaries/kernel/v2.6.28.10-3/uImage-2.6.28.10-3.bin uImage-2.6.28.10-3.bin] ([http://downloads.igep.es/binaries/kernel/v2.6.28.10-3/uImage-2.6.28.10-3.bin.md5 md5sum])
| [http://downloads.igep.es/binaries/kernel/v2.6.28.10-3/linux-omap-modules-2.6.28.10-3.tar.gz modules-2.6.28.10-3] ([http://downloads.igep.es/binaries/kernel/v2.6.28.10-3/linux-omap-modules-2.6.28.10-3.tar.gz.md5 md5sum)]
|}
Download the IGEP v2 Linux kernel sources and follow next steps:
<pre>$ wget http://downloads.igep.es/sources/linux-omap-2.6.28.tar.gz
$ tar xzf linux-omap-2.6.28.tar.gz
$ cd [kernel version]
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- igep0020_defconfig
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage modules
</pre>
The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules_install INSTALL_MOD_PATH=[path to your target rootfs]
</pre>
==== Linux Android 2.6 (development) ====
Clone the GIT repository from git.myigep.com. Based on rowboat project tree.
<pre>$ git clone git://git.igep.es/pub/scm/linux-omap-2.6.git
$ cd linux-omap-2.6
$ git checkout origin/linux-android-2.6 -b linux-android-2.6
</pre>
and build with
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- igep0020_android_defconfig
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage modules
</pre>
The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules_install INSTALL_MOD_PATH=[path to your target rootfs]
</pre>
==== Linux mainline tree (development) ====
Here is where the development work takes place and you should use this if you're after to work with the latest cutting edge developments. It is possible 'master' can suffer temporary periods of instability while new features are developed and if this is undesirable we recommend using one of the release branches. Additional patches can be found at http://patchwork.kernel.org/project/linux-omap/list
This Linux kernel is also considered as a downstream of tmlind's Linux kernel. The main difference between this tree and the linux-omap tree is that the myigep OMAP tree has unpublished patches for IGEP v2 support.
Clone GIT repository from git.myigep.com
<pre>$ git clone git://git.igep.es/pub/scm/linux-omap-2.6.git
$ cd linux-omap-2.6
</pre>
and build with
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- igep0020_defconfig
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage modules
</pre>
The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules_install INSTALL_MOD_PATH=[path to your target rootfs]
</pre>
=== Reference: Kernel features ===
{| border="1" cellspacing="2" cellpadding="2" style="color: black; border-collapse: collapse;"
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
! ''' Kernel version '''
! ''' Ethernet '''
! ''' USB OTG '''
! ''' USB host '''
! ''' WIFI SDIO '''
! ''' Bluetooth '''
! ''' Audio IN '''
! ''' Audio OUT '''
! ''' DVI-D (Vesa) '''
! ''' HDMI (720p) '''
! ''' OneNAND '''
! ''' Hw. Rev. B '''
! ''' Hw. Rev. C '''
|- style="text-align: center;"
| style="text-align: left;" | 2.6.33.4-0 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=e26b3cb4dad330ba57df7d62ada045875d0a3221 20100517])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
|- style="text-align: center;"
| style="text-align: left;" | 2.6.33.2-0 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=4fe0a5750b1658dc4fc177e25648d263807d3184 20100406])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% red;" | FAIL
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | NA
|- style="text-align: center;"
| style="text-align: left;" | 2.6.28.10-3 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=452be20337eabca99d0e012720b3b8ff05f7097e 20100318])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
|- style="text-align: center;"
| style="text-align: left;" | 2.6.28.10-2 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=2b15dcde40cf725b95141df88e9a7702316e48cf 20091222])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | NA
|- style="text-align: center;"
| style="text-align: left;" | 2.6.28.10-1 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=ceb0923118949490108f2e637877cd23e0a46e65 20091109])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | FAIL
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | NA
|- style="text-align: center;"
| style="text-align: left;" | 2.6.28.10-0 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=f12323fa4f65c024970174e79ba8da8f184dceaa 20090903])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% red;" | FAIL
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% red;" | FAIL
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | NA
|}
=== Reference: QA, diagnosis & tests ===
==== OneNAND ====
This page describes basic testing of OneNAND/NAND Flash devices, controllers, and wear levelling filesystems.
===== Simple read and write test =====
How to test:
#run 'nandtest -l 4194304 -k -p 5 /dev/mtd4'.
Result should be like this:
<pre>ECC corrections: 0
ECC failures : 0
Bad blocks : 0
BBT blocks : 0
003c0000: checking...
Finished pass 1 successfully
003c0000: checking...
Finished pass 2 successfully
003c0000: checking...
Finished pass 3 successfully
003c0000: checking...
Finished pass 4 successfully
003c0000: checking...
Finished pass 5 successfully
</pre>
{| border="1" cellspacing="2" cellpadding="2" style="color: black; border-collapse: collapse;"
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
! ''' 2.6.28.y '''
! ''' 2.6.33.y '''
! ''' 2.6.34.y '''
|- style="text-align: center;"
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
|}
===== Flash filesystem performance =====
How to test: run
#flash_eraseall /dev/mtd4
#mkdir /mnt/qa
#mount -t jffs2 /dev/mtdblock4 /mnt/qa
#cd /mnt/qa
#bonnie++ -u 0:0 -s 32 -m 16 -r 16
Result should be like this:
<pre>Using uid:0, gid:0.
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.03c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
16 32M 268 8 282 0 311 0 3082 99 +++++ +++ 331.8 1
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 50 1 2296 24 48 1 48 1 2440 21 48 1
16,32M,268,8,282,0,311,0,3082,99,+++++,+++,331.8,1,16,50,1,2296,24,48,1,48,1,2440,21,48,1
</pre>
{| border="1" align="left" cellspacing="2" cellpadding="2" width="867" style="color: black; border-collapse: collapse;"
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
| colspan="2" | '''Kernel 2.6.33'''<br>
| colspan="6" style="text-align: center;" | '''Sequential Output'''
| colspan="4" | '''Sequential Input'''
| colspan="2" rowspan="2" |
'''Random'''<br> '''Seeks'''
| colspan="1" | <br>
| colspan="6" | '''Sequential Create'''
| colspan="6" | '''Random Create'''
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
| Filesystem<br>
| Size(MB)
| colspan="2" | Per Char
| colspan="2" | Block
| colspan="2" | Rewrite
| colspan="2" | Per Char
| colspan="2" | Block
| Files
| colspan="2" | Create
| colspan="2" | Stat
| colspan="2" | Delete
| colspan="2" | Create
| colspan="2" | Stat
| colspan="2" | Delete
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
| colspan="2" | <br>
| <font size="-2">K/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">K/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">K/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">K/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">K/sec</font>
| <font size="-2">% CPU</font>
| <font size="-2">/ sec</font>
| <font size="-2">%CPU</font>
| <br>
| <font size="-2">/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/ sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/ sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/sec</font>
| <font size="-2">%CPU</font>
|-
| style="text-align: center;" | '''JFFS2'''
| style="text-align: center;" | 32M
| style="text-align: center;" | 268
| style="text-align: center;" | 8
| 282
| style="text-align: center;" | 0
| style="text-align: center;" | 311
| style="text-align: center;" | 0
| style="text-align: center;" | 3082
| style="text-align: center;" | 99
| style="text-align: center;" | +++++
| style="text-align: center;" | +++
| style="text-align: center;" | 331.8
| style="text-align: center;" | 1
| style="text-align: center;" | 16
| style="text-align: center;" | 50
| style="text-align: center;" | 1
| style="text-align: center;" | 2296
| style="text-align: center;" | 24
| style="text-align: center;" | 48
| style="text-align: center;" | 1
| 48
| style="text-align: center;" | 1
| style="text-align: center;" | 2440
| style="text-align: center;" | 21
| style="text-align: center;" | 48
| style="text-align: center;" | 1
|}
==== SD-card ====
===== SD filesystem performance =====
How to test: run
#Insert a formated sd-card
#cd /mnt/mmcblk0p1
#bonnie++ -u 0:0 -s 32 -m 16 -r 16
Embedded Linux is the use of a Linux operating system in embedded computer systems such as mobile phones, personal digital assistants, media players, set-top boxes, and other consumer electronics devices, networking equipment, machine control, industrial automation, navigation equipment and medical instruments.
Unlike desktop and server versions of Linux, embedded versions of Linux are designed for devices with relatively limited resources, such as cell phones and set-top boxes. Due to concerns such as cost and size, embedded devices usually have much less RAM and secondary storage than desktop computers, and are likely to use flash memory instead of a hard drive. Since embedded devices serve specific rather than general purposes, developers optimize their embedded Linux distributions to target specific hardware configurations and usage situations. These optimizations can include reducing the number of device drivers and software applications, and modifying the Linux kernel to be a real-time operating system.
=== Overview of How-To ===
This How-To is meant to be a starting point for people to learn build a kernel image for IGEP v2 devices as quickly and easily as possible.
This How-To works with the Ubuntu 8.04 IGEP v2.0 SDK Virtual Machine but most of the contents are valid also for other GNU/Linux distributions. We do not issue any guarantee that this will work on other distributions.
=== Requirements ===
*'''Ubuntu 8.04 IGEP v2.0 SDK Virtual Machine'''
=== Supported kernels ===
First of all setup the build environment sourcing this script
<pre>$ source /usr/local/poky/eabi-glibc/arm/environment-setup
</pre>
or
<pre>$ source /usr/local/poky/eabi-glibc/environment-setup-arm-none-linux-gnueabi
</pre>
if you have updated your SDK environment to latest version (see [[Ubuntu804IGEPv20SDKVirtualMachine|Ubuntu 8.04 IGEP v2.0 SDK Virtual Machine]])
=== Kernel image for IGEP v2 ===
==== Linux OMAP v2.6.33 series (stable) ====
Latest stable kernel version is: '''2.6.33.4-0 (20100517)'''
{| border="1"
|-
! '''Sources'''
! '''uImage binary'''
! '''Modules binaries'''
|-
| [http://downloads.igep.es/sources/linux-omap-2.6.33.4-0.tar.gz 2.6.33.4-0] ([http://downloads.igep.es/sources/linux-omap-2.6.33.4-0.tar.gz.md5 md5sum])
| [http://downloads.igep.es/binaries/kernel/v2.6.33.4-0/uImage-2.6.33.4-0.bin uImage-2.6.33.4-0.bin] ([http://downloads.igep.es/binaries/kernel/v2.6.33.4-0/uImage-2.6.33.4-0.bin.md5 md5sum])
| [http://downloads.igep.es/binaries/kernel/v2.6.33.4-0/linux-omap-modules-2.6.33.4-0.tar.gz modules-2.6.33.4-0] ([http://downloads.igep.es/binaries/kernel/v2.6.33.4-0/linux-omap-modules-2.6.33.4-0.tar.gz.md5 md5sum)]
|}
Download the IGEP v2 Linux kernel sources and follow next steps:
<pre>$ wget http://www.downloads.igep.es/sources/linux-omap-2.6.33.tar.gz
$ tar xzf linux-omap-2.6.33.tar.gz
$ cd [kernel version]
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- igep0020_defconfig
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage modules
</pre>
The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules_install INSTALL_MOD_PATH=[path to your target rootfs]
</pre>
==== Linux OMAP v2.6.28 series (stable) ====
Latest stable kernel version is: '''2.6.28.10-3 (20100318)'''
{| border="1" class="simple"
|-
! '''Sources'''
! '''uImage binary'''
! '''Modules binaries'''
|-
| [http://downloads.igep.es/sources/linux-omap-2.6.28.10-3.tar.gz 2.6.28.10-3] ([http://downloads.igep.es/sources/linux-omap-2.6.28.10-3.tar.gz.md5 md5sum])
| [http://downloads.igep.es/binaries/kernel/v2.6.28.10-3/uImage-2.6.28.10-3.bin uImage-2.6.28.10-3.bin] ([http://downloads.igep.es/binaries/kernel/v2.6.28.10-3/uImage-2.6.28.10-3.bin.md5 md5sum])
| [http://downloads.igep.es/binaries/kernel/v2.6.28.10-3/linux-omap-modules-2.6.28.10-3.tar.gz modules-2.6.28.10-3] ([http://downloads.igep.es/binaries/kernel/v2.6.28.10-3/linux-omap-modules-2.6.28.10-3.tar.gz.md5 md5sum)]
|}
Download the IGEP v2 Linux kernel sources and follow next steps:
<pre>$ wget http://downloads.igep.es/sources/linux-omap-2.6.28.tar.gz
$ tar xzf linux-omap-2.6.28.tar.gz
$ cd [kernel version]
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- igep0020_defconfig
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage modules
</pre>
The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules_install INSTALL_MOD_PATH=[path to your target rootfs]
</pre>
==== Linux Android 2.6 (development) ====
Clone the GIT repository from git.myigep.com. Based on rowboat project tree.
<pre>$ git clone git://git.igep.es/pub/scm/linux-omap-2.6.git
$ cd linux-omap-2.6
$ git checkout origin/linux-android-2.6 -b linux-android-2.6
</pre>
and build with
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- igep0020_android_defconfig
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage modules
</pre>
The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules_install INSTALL_MOD_PATH=[path to your target rootfs]
</pre>
==== Linux mainline tree (development) ====
Here is where the development work takes place and you should use this if you're after to work with the latest cutting edge developments. It is possible 'master' can suffer temporary periods of instability while new features are developed and if this is undesirable we recommend using one of the release branches. Additional patches can be found at http://patchwork.kernel.org/project/linux-omap/list
This Linux kernel is also considered as a downstream of tmlind's Linux kernel. The main difference between this tree and the linux-omap tree is that the myigep OMAP tree has unpublished patches for IGEP v2 support.
Clone GIT repository from git.myigep.com
<pre>$ git clone git://git.igep.es/pub/scm/linux-omap-2.6.git
$ cd linux-omap-2.6
</pre>
and build with
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- igep0020_defconfig
$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- uImage modules
</pre>
The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs
<pre>$ make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules_install INSTALL_MOD_PATH=[path to your target rootfs]
</pre>
=== Reference: Kernel features ===
{| border="1" cellspacing="2" cellpadding="2" style="color: black; border-collapse: collapse;"
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
! ''' Kernel version '''
! ''' Ethernet '''
! ''' USB OTG '''
! ''' USB host '''
! ''' WIFI SDIO '''
! ''' Bluetooth '''
! ''' Audio IN '''
! ''' Audio OUT '''
! ''' DVI-D (Vesa) '''
! ''' HDMI (720p) '''
! ''' OneNAND '''
! ''' Hw. Rev. B '''
! ''' Hw. Rev. C '''
|- style="text-align: center;"
| style="text-align: left;" | 2.6.33.4-0 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=e26b3cb4dad330ba57df7d62ada045875d0a3221 20100517])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
|- style="text-align: center;"
| style="text-align: left;" | 2.6.33.2-0 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=4fe0a5750b1658dc4fc177e25648d263807d3184 20100406])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% red;" | FAIL
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | NA
|- style="text-align: center;"
| style="text-align: left;" | 2.6.28.10-3 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=452be20337eabca99d0e012720b3b8ff05f7097e 20100318])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
|- style="text-align: center;"
| style="text-align: left;" | 2.6.28.10-2 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=2b15dcde40cf725b95141df88e9a7702316e48cf 20091222])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | NA
|- style="text-align: center;"
| style="text-align: left;" | 2.6.28.10-1 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=ceb0923118949490108f2e637877cd23e0a46e65 20091109])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | FAIL
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | NA
|- style="text-align: center;"
| style="text-align: left;" | 2.6.28.10-0 ([http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=f12323fa4f65c024970174e79ba8da8f184dceaa 20090903])
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% red;" | FAIL
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% red;" | FAIL
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% yellow;" | NA
|}
=== Reference: QA, diagnosis & tests ===
==== OneNAND ====
This page describes basic testing of OneNAND/NAND Flash devices, controllers, and wear levelling filesystems.
===== Simple read and write test =====
How to test:
#run 'nandtest -l 4194304 -k -p 5 /dev/mtd4'.
Result should be like this:
<pre>ECC corrections: 0
ECC failures : 0
Bad blocks : 0
BBT blocks : 0
003c0000: checking...
Finished pass 1 successfully
003c0000: checking...
Finished pass 2 successfully
003c0000: checking...
Finished pass 3 successfully
003c0000: checking...
Finished pass 4 successfully
003c0000: checking...
Finished pass 5 successfully
</pre>
{| border="1" cellspacing="2" cellpadding="2" style="color: black; border-collapse: collapse;"
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
! ''' 2.6.28.y '''
! ''' 2.6.33.y '''
! ''' 2.6.34.y '''
|- style="text-align: center;"
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
| style="background: none repeat scroll 0% 0% green;" | PASS
|}
===== Flash filesystem performance =====
How to test: run
#flash_eraseall /dev/mtd4
#mkdir /mnt/qa
#mount -t jffs2 /dev/mtdblock4 /mnt/qa
#cd /mnt/qa
#bonnie++ -u 0:0 -s 32 -m 16 -r 16
Result should be like this:
<pre>Using uid:0, gid:0.
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.03c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
16 32M 268 8 282 0 311 0 3082 99 +++++ +++ 331.8 1
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 50 1 2296 24 48 1 48 1 2440 21 48 1
16,32M,268,8,282,0,311,0,3082,99,+++++,+++,331.8,1,16,50,1,2296,24,48,1,48,1,2440,21,48,1
</pre>
{| border="1" align="left" cellspacing="2" cellpadding="2" width="867" style="color: black; border-collapse: collapse;"
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
| colspan="2" | '''Kernel 2.6.33'''<br>
| colspan="6" style="text-align: center;" | '''Sequential Output'''
| colspan="4" | '''Sequential Input'''
| colspan="2" rowspan="2" |
'''Random'''<br> '''Seeks'''
| colspan="1" | <br>
| colspan="6" | '''Sequential Create'''
| colspan="6" | '''Random Create'''
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
| Filesystem<br>
| Size(MB)
| colspan="2" | Per Char
| colspan="2" | Block
| colspan="2" | Rewrite
| colspan="2" | Per Char
| colspan="2" | Block
| Files
| colspan="2" | Create
| colspan="2" | Stat
| colspan="2" | Delete
| colspan="2" | Create
| colspan="2" | Stat
| colspan="2" | Delete
|- style="background: none repeat scroll 0% 0% rgb(209, 209, 209); text-align: center;"
| colspan="2" | <br>
| <font size="-2">K/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">K/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">K/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">K/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">K/sec</font>
| <font size="-2">% CPU</font>
| <font size="-2">/ sec</font>
| <font size="-2">%CPU</font>
| <br>
| <font size="-2">/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/ sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/ sec</font>
| <font size="-2">%CPU</font>
| <font size="-2">/sec</font>
| <font size="-2">%CPU</font>
|-
| style="text-align: center;" | '''JFFS2'''
| style="text-align: center;" | 32M
| style="text-align: center;" | 268
| style="text-align: center;" | 8
| 282
| style="text-align: center;" | 0
| style="text-align: center;" | 311
| style="text-align: center;" | 0
| style="text-align: center;" | 3082
| style="text-align: center;" | 99
| style="text-align: center;" | +++++
| style="text-align: center;" | +++
| style="text-align: center;" | 331.8
| style="text-align: center;" | 1
| style="text-align: center;" | 16
| style="text-align: center;" | 50
| style="text-align: center;" | 1
| style="text-align: center;" | 2296
| style="text-align: center;" | 24
| style="text-align: center;" | 48
| style="text-align: center;" | 1
| 48
| style="text-align: center;" | 1
| style="text-align: center;" | 2440
| style="text-align: center;" | 21
| style="text-align: center;" | 48
| style="text-align: center;" | 1
|}
==== SD-card ====
===== SD filesystem performance =====
How to test: run
#Insert a formated sd-card
#cd /mnt/mmcblk0p1
#bonnie++ -u 0:0 -s 32 -m 16 -r 16
