Flameman/dht-walnut/rootfs

= rootfs =

what you need
you need
 * a PC running a tftpboot server
 * the new ramrootfs
 * for an empty 2..4Gbyte storage for the full gentoo rootfs
 * for an empty 512Mb..1Gbyte storage for the embedded gentoo rootfs

new ramrootfs, tftp uboot uImage: install/recovery/first-aid
Image Name:  "ramrootfs" Created:     Fri Jul  3 15:51:20 2009 Image Type:  PowerPC unix Kernel uboot-uImage (gzip compressed) Load Address: 0x00000000 Entry Point: 0x00000000

goal
this is a pretty embedded kit able to bootstrap the dht-walunt with a early ram rootfs populated with the essential you need to


 * mount/nfs mount a disk
 * nano/hexedit configure mounted disk files from disaster
 * badklocks/fsck.{ext2,ext3,minix} a disk
 * fdisk, mac-fdisk a disk
 * scp/wget file from the lan (it's very goot to install gentoo stages from gentoo mirrors)
 * ssh/telnet to/from hostes
 * sync your system date to the internet rdate

about
this rootfs has been build with
 * gcc powerpc-softfloat-linux-uclibc v4.1.2
 * static stripped elf

it is based on the following packages:


 * bash-3.2_p33: ok
 * busybox-1.7.4: ok
 * dropbear-0.49: ok
 * e2fsprogs-1.40.9: ok
 * hexedit-1.2.12: ok
 * mac-fdisk-hacked-for-mips-arm: ok
 * nano-2.1.5: ok
 * nfs-utils-1.1.0: ok
 * openssh-4.7_p1-r6: ok
 * shadow-4.0.18.2: ok
 * sysvinit-2.86: ok
 * my-init: no
 * tty-redirect-openpty: ok

it works

 * locally on the serial console, where it bootstrap
 * remotely on telnet with the ip 192.168.1.2

sorry sshd is not provided yet, you have to telnet

issue
there is an issue if you decide to use ssh/scp on the serial console the problem is related to a redirection of /dev/console to /dev/tty so to avoid you need to invoke openpty (an app i prepared as temporary fixup)

scp is reporting debug1: Next authentication method: password debug1: read_passphrase: can't open /dev/tty: No such device or address

workaround

uc-earlyrootfs ~ # tty /dev/ttyS0 uc-earlyrootfs ~ # echo "hAllo" > /dev/tty /dev/tty no such decice or address uc-earlyrootfs ~ # openpty uc-earlyrootfs ~ # tty /dev/pts/0 uc-earlyrootfs ~ # echo "hAllo" > /dev/tty hAllo

missing

 * /dev/initctl
 * halt/reset/shudown
 * sshd, fptd

download
07-2009: kernel 2.6.15.4+initramfs full tested and working [[Media:kernel-dht-walnut-ramrootfs-uImage.tgz|kernel-dht-walnut-ramrootfs-uImage.tgz]]

file size: 3.97 MB, MIME type, the original was 4.3Mb but this wiki is refusing to upload file greater than 4Mb, so the kernel has been reduced and in features: no scsi and graph console support

contents:

gentoo-2.6.15.4-dht-walnut-uImage -> what you have to tftpboot to dht-walnut

gentoo-2.6.15.4-dht-walnut-uImage.md5 -> the md5sum should be b6c1e725984c665e46c1428d0f953149

tested with

 * U-Boot 1.2.0-g7882751c-dirty (Apr 14 2007 - 16:44:37): working (with ide support, working, tftp bug)
 * U-Boot 2009.06-00273-g59869ca-dirty (Jul 08 2009 - 08:12:46): working (but this version has no ide capabilities, so no disk-boot is possible)
 * U-Boot 1.2-2009 (Jul 24 2009 - still under development): working (with ide support, working, suggest as the final firmware)

firmware issues with
reported issues with uboot 1.1.4 and ppcboot 1.1.6


 * host: tftp-boot-image, md5 check passes
 * gentoo-walnut-rammrootfs-uImage has md5 B6C1E725984C665E46C1428D0F953149
 * the image file size is 4161527 bytes, crc32 of the file is 8031f4dc
 * target: tftp
 * set up the ramrootfs boot args and tftp the image into the DHT-walnut
 * full 4161527 bytes were transferred.
 * loaded image, performed a crc32 command, passes
 * bootm, panic, It reports "4161463 Bytes = 4063 kB = 3 MB"

usage
assure you have bootargs console=ttyS0,9600 rdinit=/sbin/init init=/bin/bash in your tftp

here it is my whole environment, in where i simply invoke 2 macro + bootm


 * run ramrootfs
 * run boot-tftp
 * bootm

earlyrootfs login: root Password: (enter, no password)

=> printenv bootdelay=5 loads_echo=1 netdev=eth0 ramargs=setenv bootargs root=/dev/ram rw                     addip=setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}:${netdev}:off panic=1 addtty=setenv bootargs ${bootargs} console=ttyS0,${baudrate} kernel_addr=fff80000 ramdisk_addr=fff80000 update=protect off fffc0000 ffffffff;era fffc0000 ffffffff;cp.b 100000 fffc0000 40000;setenv filesize;saveenv ethact=ppc_4xx_eth0 hostname=walnut-ppc405 ethaddr=DE:AD:BE:EF:DE:AD preboot=echo "ide.part.1th stores kernel rawimage" myroot=/dev/hda4 myinit=/sbin/init fileaddr=800000 netmask=255.255.255.0 bootcmd=run boot-disk ; bootm myboot_diskpart=0:1 myboot_kernel_addr=800000 baudrate=9600 myuart=ttyS0 setconsole_uart=setenv myconsole ${myuart},${baudrate} setconsole_video=setenv myconsole tty video=${myvideofb} myvideofb=matroxfb:800x600-16@60 setbootargs=setenv bootargs console=${myconsole} root=${myroot} init=${myinit} myconsole=ttyS0,9600 bootargs=console=ttyS0,9600 root=/dev/hda4 init=/sbin/init boot-tftp=tftpboot ${myboot_kernel_addr} ${myboot_file} boot-disk=diskboot ${myboot_kernel_addr} ${myboot_diskpart} ipaddr=192.168.1.5 serverip=192.168.1.14 gatewayip=192.168.1.1 myboot_file=gentoo-walnut-ramrootfs.img ramrootfs=setenv bootargs console=ttyS0,9600 rdinit=/sbin/init init=/bin/bash stdin=serial stdout=serial stderr=serial ver=U-Boot 1.2.0-g7882751c-dirty (Apr 14 2007 - 16:44:37)

Environment size: 1405/16379 bytes => run ramrootfs => run boot-tftp PHY speed read failed, assuming 10bT PHY duplex read failed, assuming half duplex ENET Speed is 10 Mbps - HALF duplex connection (EMAC0) Using ppc_4xx_eth0 device TFTP from server 192.168.1.14; our IP address is 192.168.1.5 Filename 'gentoo-walnut-ramrootfs.img'. Load address: 0x800000 Loading: ################################################################# #################################################################        #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         ############################## done Bytes transferred = 4161527 (3f7ff7 hex) => bootm Image Name:  "ramrootfs" Created:     2009-07-06  11:19:06 UTC Image Type:  PowerPC Linux Kernel Image (gzip compressed) Data Size:   4161463 Bytes =  4 MB           Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK  Uncompressing Kernel Image ... OK kernel 2.6.15.4-sliding-snow-leopard-dht-walnut-ppc405 (root@minerva) (gcc version 4.1.2) #30 Fri Jul 3 15:14:11 CEST 2009 IBM Walnut port (C) 2000-2002 MontaVista Software, Inc. (source@mvista.com) ...
 * 1) Booting image at 00800000 ...