Jerry Van Baren wrote: > Pieter wrote: >> Hi all >> >> I have been working on booting our custom MPC8548 board using a FDT. >> The board boots up to the point where "controll is passed to Linux" >> and then nothing happens. I have plased the final part of the console >> output at the bottom of this message. >> >> Does anyone have an idea about what is going wrong? >> Is the error in my u-boot, device tree blob or linux kernel side? > > Probably. :-/ >> thanks pieter >> >> WARNING: adjusting available memory to 10000000 >> ## Booting kernel from Legacy Image at 00200000 ... > Try a higher address, say 00400000? >> Image Name: Linux-2.6.27 >> Image Type: PowerPC Linux Kernel Image (gzip compressed) >> Data Size: 1194002 Bytes = 1.1 MB >> Load Address: 00000000 >> Entry Point: 00000000 >> Verifying Checksum ... OK >> kernel data at 0x00200040, len = 0x00123812 (1194002) >> ## Flattened Device Tree blob at 00800000 >> Booting using the fdt blob at 0x800000 >> of_flat_tree at 0x00800000 size 0x000037bc >> Uncompressing Kernel Image ... OK >> kernel loaded at 0x00000000, end = 0x00294a90 >> ## device tree at 0x00800000 ... 0x008037BB (len=26556=0x67BC) >> ## Transferring control to Linux (at address 00000000) ... >> Booting using OF flat tree... > Where did you get your FDT source from? > Did you modify it? > Does your FDT blob get properly fixed up by your u-boot? > > It is difficult (and not very profitable) to try to make a new linux > kernel run with an old u-boot version because both linux and u-boot > fdt handling matured considerably over the last year. The (kernel) > FDT blob sources have matured a huge amount over the last year. > > Good luck, > gvb I should have added more specific information - i apologize. The board worked on my old plarform which consisted of U-Boot 1.2 booting Linux 2.6.24 not using a FDT. ( the ppc architecture).My current effort is porting to U-Boot 2008.10 and booting Linux 2.6.27. This prompted the move to the powerpc architecture and requirement to use a FDT.
The Designers of the board I have did not support FDT, thus I created a FDT source for my board based on the sbc8548 board (included in U-boot) and using the "Booting the Linux/ppc kernel without Open Firmware" document supplied with Lnux 2.6.27. I am uncertain about assigning interrupts to the variouse nodes. I compiled the blob using dtc Version: 1.1.0: dtc -b 0 -V 17 -p 0x2000 -I dts -R 8 -O dtb -f arch/powerpc/boot/dts/equus.dts > SDH0/tftp/equus.dtb My FDT blob is minimal, containg the CPU node, Memory node, SOC node and Localbus. U-boot seems happy with the blob and fill in the appropriate field in the CPU node (bus / cpu clocks) and Ethernet MAC addresses I moved both the uImage and the FDTblob load addresses higher, 0x01000000 and 0x02000000 respectively. but the boot stil hangs after " ## Transferring control to Linux (at address 00000000) ... Booting using OF flat tree... " _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
