Embedding Linux on the Encore Simputer Samyeer Metrani Encore Software Limited

Agenda The Encore Simputer Building an ARM Linux Kernel Porting to the Encore Simputer Porting the 2.6-test9 kernel

The Encore Simputer

Building an ARM Linux Kernel

Porting to the Encore Simputer

Porting the 2.6-test9 kernel

The Encore-Simputer

The Encore Simputer 206Mhz StrongARM Processor 32-64 MB DRAM – 16-32MB Flash LCD Panel Color/Mono Display TouchPanel Input Internal Mic & Speaker USB Slave and Serial Port PC Connectivity Smartcard Interface V.90 Internal Modem USB Master Compact Flash (CF II)

206Mhz StrongARM Processor

32-64 MB DRAM – 16-32MB Flash

LCD Panel Color/Mono Display

TouchPanel Input

Internal Mic & Speaker

USB Slave and Serial Port PC Connectivity

Smartcard Interface

V.90 Internal Modem

USB Master

Compact Flash (CF II)

What is on the Simputer? Stock Linux ARM Kernel glibc 2.2.4 XWindows 4.2 and Related X Libraries GTK 1.2 Libraries Networking Tools PPP, ftp, telnet, … Utilities and Feature Demo’s

Stock Linux ARM Kernel

glibc 2.2.4

XWindows 4.2 and Related X Libraries

GTK 1.2 Libraries

Networking Tools

PPP, ftp, telnet, …

Utilities and Feature Demo’s

Tools Needed The ARM Toolchain Using the skiff toolchain Other pre-built toolchains ftp://ftp.arm.linux.org.uk/pub/armlinux/toolchain/ Building a toolchain.

The ARM Toolchain

Using the skiff toolchain

Other pre-built toolchains

ftp://ftp.arm.linux.org.uk/pub/armlinux/toolchain/

Building a toolchain.

Building an ARM-Linux Kernel Selecting a Platform The Assabet Platform The Linux Kernel www.kernel.org Russel King’s Patches www.arm.linux.org.uk Building the first kernel Cross Compilation Support Makefile Modifications.

Selecting a Platform

The Assabet Platform

The Linux Kernel

www.kernel.org

Russel King’s Patches

www.arm.linux.org.uk

Building the first kernel

Cross Compilation Support

Makefile Modifications.

Running the Kernel The Bootloader BLOB – www.lart.tudelft.nl bootldr - http://www.handhelds.org/projects/cvsproj.html?project= bootldr What does the bootloader do Processor and Memory initialisation Setup a serial console Load kernel (and ramdisk) Bootloader support for the kernel.

The Bootloader

BLOB – www.lart.tudelft.nl

bootldr - http://www.handhelds.org/projects/cvsproj.html?project= bootldr

What does the bootloader do

Processor and Memory initialisation

Setup a serial console

Load kernel (and ramdisk)

Bootloader support for the kernel.

Adding a new architecture Registering a Machine Type www.arm.linux.org.uk/developer/machines/ arch/arm/tools/mach-types Modifying the configuration menu Creating a default configuration Booting the First Kernel Turning on Kernel Debug.

Registering a Machine Type

www.arm.linux.org.uk/developer/machines/

arch/arm/tools/mach-types

Modifying the configuration menu

Creating a default configuration

Booting the First Kernel

Turning on Kernel Debug.

Getting the Kernel Booting Bootloader specific initialisation Kernel Notes http://www.arm.linux.org.uk/developer/kernelnotes.shtml Modifying Configure.help Building a kernel patch.

Bootloader specific initialisation

Kernel Notes

http://www.arm.linux.org.uk/developer/kernelnotes.shtml

Modifying Configure.help

Building a kernel patch.

Machine Specific Initialisations Architecture specific initialisation esl_simputer.c, esl_simputer.h Makefile Modifications Board specific Initialisations DRAM Support Flash MAPS Bringing up the display Building a new patch.

Architecture specific initialisation

esl_simputer.c, esl_simputer.h

Makefile Modifications

Board specific Initialisations

DRAM Support

Flash MAPS

Bringing up the display

Building a new patch.

What next… Hardware Interfaces Peripheral Support Touchpanel Audio Support Keypad Support RTC Support USB, Compact Flash Kernel 2.6…

Hardware Interfaces

Peripheral Support

Touchpanel

Audio Support

Keypad Support

RTC Support

USB, Compact Flash

Kernel 2.6…

Porting the 2.6-test9 kernel Why 2.6 kernel? Toolchain Differences 2.95.3, 3,3,1 … Bootloader Support Configuration Files.

Why 2.6 kernel?

Toolchain Differences

2.95.3, 3,3,1 …

Bootloader Support

Configuration Files.

Thank You Samyeer Metrani