AT91RM9200 & uClinux

AT91RM9200 & uClinux

1. Copy & Unpack uClinux distributive to opt cp uClinux-dist-20041215.tar.bz2 /opt cd /opt tar -xjvf ./uClinux-dist-20041215.tar.bz2

1. Copy & Unpack Atmel Linux kernel to uClinux tree cp linux-2.4.19-rmk7.tar.gz /opt/uClinux-dist cd /opt/uClinux-dist tar -xzvf linux-2.4.19-rmk7.tar.gz

2. Copy & apply EVM9200 support for linux-2.4.19-rmk7 cp linux-2.4.19-rmk7-EVM9200.patch /opt/uClinux-dist cd /opt/uClinux-dist cat ./linux-2.4.19-rmk7-EVM9200.patch | patch -p0

If you board differ from EVM9200. Don't apply linux-2.4.19-rmk7-EVM9200.patch.

ln -s /opt/uClinux-dist/linux-2.4.19-rmk7 /opt/uClinux-dist/linux-2.4.19.rmk7.x

1. Copy & Apply EVM9200 support for uClinux cp EVM9200-uClinux-20041215.patch /opt cd ./opt cat ./EVM9200-uClinux-20041215.patch | patch -p0

1. Configure linux-2.4.19-rmk7 & uClinux user applications

type: make menuconfig

From main menu select item: 'Vendor/Product Selection'

Then from 'Vendor/Product Selection' dialog Select Vendor: '(Atmel) Vendor' Select Product: '(EVM9200)'

If you board differ select another board type.

Return to main menu. From main menu select item:'Kernel/Library/Default Selection'

Then from 'Kernel/Library/Default Selection' dialog Select kernel version:(linux-2.4.19-rmk7.x) and Libc Version : (glibc)

Return to main menu. Select "Exit" to exit from 'make menuconfig' utility.

1. Compile linux-2.4.19-rmk7 & uClinux user applications

type:

make dep 2>&1 | tee make_dep.out make | tee make.out

files appear:

/opt/uClinux-dist/images/ucImage /opt/uClinux-dist/images/ucInitrd

1. Update kernel image via u-boot.

u-boot>tftpboot 20800000 ucImage u-boot>protect off 10020000 100BFFFF u-boot>erase 10020000 100BFFFF u-boot>cp.b 20800000 10020000 9FFFF

where: u-boot> - u-boot prompt

tftpboot - u-boot load file via tftp protocol command

20800000 - SDRAM load address ucImage - linux kernel image

uImage must be located at the host tftp server download directory (Linux host) /tftpboot

protect - u-boot flash protect on/off command off - disable protection

10020000 - start flash address
100BFFFF - end flash address

erase - u-boot flash erase command

10020000 - start flash erase address
100BFFFF - end flash erase address

cp.b - u-boot byte copy command

20800000 - SDRAM source address
10020000 - flash destination address
9FFFF - bytes copy

1. Update linux initrd via u-boot tftp.

If initrd is in parallel flash: u-boot>tftpboot 20800000 ucInitrd u-boot>erase 100C0000 101EFFFF u-boot>cp.b 20800000 100C0000 12FFFF

If in AT45DB642: u-boot>tftpboot 20800000 ucInitrd u-boot>protect off C0000000 C001FFFF u-boot>cp.b 20800000 C0000000

1. Set u-boot environment variables. for 32Mb SDRAM: u-boot>setenv bootargs root=/dev/ram rw initrd=0x20800000,0x400000 ramdisk_size=8000 console=ttyS0,115200 mem=32M or for 16Mb SDRAM: u-boot>setenv bootargs root=/dev/ram rw initrd=0x20800000,0x400000 ramdisk_size=8000 console=ttyS0,115200 mem=16M

u-boot>bootcmd bootm 10020000 100C0000

or if initrd disk in AT45DB642:

u-boot>bootcmd bootm 10020000 C0000000

u-boot>saveenv

1. Reboot target.

Best Regards, Dmitriy Ckerkashin.