[U-Boot] U-Boot hangs after loading device tree

[Pieter <phenning@vastech.co.za>]

Afzal Nadirshah wrote:

> > Hi,
> >        I am trying to bring linux up on our custom board, by loading the kernel.img , canynlands.dtb and Ramdisk onto the RAM using the serial port.
> >        However the boot process is getting hung. The boot boot process stops after the following messages :
> >
> >
> >      => run flash_self
> > ## Booting kernel from Legacy Image at 1c000000 ...
> >    Image Name:   Linux-2.6.25.7-00002-geaaf8db
> >    Created:      2008-06-30  13:53:11 UTC
> >    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
> >    Data Size:    1547704 Bytes =  1.5 MB
> >    Load Address: 00000000
> >    Entry Point:  00000000
> >    Verifying Checksum ... OK
> > ## Loading init Ramdisk from Legacy Image at 1c200000 ...
> >    Image Name:   Simple Embedded Linux Framework
> >    Created:      2002-10-24   9:30:38 UTC
> >    Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
> >    Data Size:    1476478 Bytes =  1.4 MB
> >    Load Address: 00000000
> >    Entry Point:  00000000
> >    Verifying Checksum ... OK
> > ## Flattened Device Tree blob at 1c1e0000
> >    Booting using the fdt blob at 0x1c1e0000
> >    Uncompressing Kernel Image ... OK
> >    Loading Ramdisk to 1fc78000, end 1fde077e ... OK
> >    Loading Device Tree to 007f9000, end 007ff0b4 ... OK
> >
> >
> > I have changed the kernel_addr, fdt_addr and the ramdisk_addr to the RAM addresses.
> > This is the output of the printenv command :
> >
> >
> > => printenv
> > bootdelay=5
> > baudrate=115200
> > loads_echo=
> > preboot=echo;echo Type "run flash_nfs" to mount root filesystem over NFS;echo
> > hostname=canyonlands
> > netdev=eth0
> > nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=${serverip}:${rootpath}
> > ramargs=setenv bootargs root=/dev/ram rw
> > addip=setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}1
> > addtty=setenv bootargs ${bootargs} console=ttyS0,${baudrate}
> > addmisc=setenv bootargs ${bootargs}
> > initrd_high=30000000
> > kernel_addr_r=400000
> > fdt_addr_r=800000
> > ramdisk_addr_r=C00000
> > hostname=canyonlands
> > bootfile=canyonlands/uImage
> > ramdisk_file=canyonlands/uRamdisk
> > rootpath=/opt/eldk/ppc_4xxFP
> > flash_self=run ramargs addip addtty addmisc;bootm ${kernel_addr} ${ramdisk_addr} ${fdt_addr}
> > flash_nfs=run nfsargs addip addtty addmisc;bootm ${kernel_addr} - ${fdt_addr}
> > net_nfs=tftp ${kernel_addr_r} ${bootfile}; tftp ${fdt_addr_r} ${fdt_file}; run nfsargs addip a}
> > net_self_load=tftp ${kernel_addr_r} ${bootfile};tftp ${fdt_addr_r} ${fdt_file};tftp ${ramdisk_;
> > net_self=run net_self_load;run ramargs addip addtty addmisc;bootm ${kernel_addr_r} ${ramdisk_a}
> > fdt_file=canyonlands/canyonlands.dtb
> > load=tftp 200000 canyonlands/u-boot.bin
> > update=protect off 0x01000000 FFFFFFFF;era 0x01000000 FFFFFFFF;cp.b ${fileaddr} 0x01000000 ${fv
> > upd=run load update
> > nload=tftp 200000 canyonlands/u-boot-nand.bin
> > nupdate=nand erase 0 100000;nand write 200000 0 100000;setenv filesize;saveenv
> > nupd=run nload nupdate
> > pciconfighost=1
> > pcie_mode=RP:RP
> > fdt_addr=1c1e0000
> > ramdisk_addr=1c200000
> > ram_root=run ramargs addip;bootm ${kernel_addr} ${ramdisk_addr} ${fdt_addr}
> > ram_ws=1C000000
> > kernel_addr=1c000000
> > stdin=serial
> > stdout=serial
> > stderr=serial
> > ver=U-Boot 2009.01 (Feb 25 2009 - 15:12:15)
> > bootcmd=run flash_self
> > bootargs=root=/dev/ram rw ip=::::canyonlands:eth0:off panic=1 console=ttyS0,115200
> > filesize=1687BE
> >
> > Have anybody faced a similar problem?
> >   
>   
I recently had a similar problem - the solution was a combination of DTS
tweaks and U-Boot defines for my board. have a look at the post mortem
debugging and recheck all your defines.

 <http://www.denx.de/wiki/view/DULG/LinuxPostMortemAnalysis>

or search the mailing list for my postings: 
	 [U-Boot] Custom MPC8548 boot using FDT problem
cheers pieter



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