---------------------------------------- > Date: Mon, 3 Dec 2012 10:39:05 -0500 > Subject: Re: Arndale support > From: cdall@xxxxxxxxxxxxxxx > To: james.white.2012@xxxxxxxxxxx > CC: kvmarm@xxxxxxxxxxxxxxxxxxxxx > > On Mon, Dec 3, 2012 at 10:28 AM, James White > <james.white.2012@xxxxxxxxxxx> wrote: > > > >> Subject: Re: Arndale support > >> > >> > >> > >> On Tue, Nov 20, 2012 at 9:35 AM, Christoffer Dall > >> <cdall@xxxxxxxxxxxxxxx<mailto:cdall@xxxxxxxxxxxxxxx>> wrote: > >> Hi there, > >> > >> For those of you with an Arndale board who would like to boot KVM on > >> it, I have a hack for u-boot and the kernel that makes things work. > >> > >> Take a look here: > >> > >> https://github.com/columbia/linux-kvm-arm/tree/lue_arndale-kvm > >> branch: lue_arndale-kvm > >> (use the arndale_kvm_defconfig if you like) > >> > >> And the u-boot code here: > >> https://github.com/columbia/u-boot-arndale > >> branch: lue_arndale-kvm > >> > >> > >> oh, and here's some instructions for how to flash. > >> > >> Use this as a starting > >> point: https://wiki.linaro.org/Boards/Arndale/Setup/EnterpriseUbuntuServer > >> > >> Make sure you flash the bl1 and the dt and such, and set up the right > >> u-boot environment. > >> > >> To flash this u-boot, do: > >> > >> $ export ARCH=arm > >> $ export CROSS_COMPILE=<whatever you use> > >> $ cd u-boot-arndlae > >> $ make arndale5250 #builds both SPL and u-boot proper > >> $ sudo dd if=spl/smdk5250-spl.bin of=/dev/sdX bs=512 seek=17 > >> $ sudo dd if=u-boot.bin of=/dev/sdX bs=512 seek=49 > >> > >> $ cd ../linux-kvm-arm > >> $ git checkout lue_arndale-kvm > >> $ make arndale_kvm_defconfig > >> $ make -j8 uImage > >> $ sudo dd if=arch/arm/boot/uImage of=/dev/sdX bs=512 seek=1105 > >> > >> and that's it. > > > > I have built u-boot and linux-kvm-arm from your trees, but when I try to boot the board I get the following error: > > > > MMC read: dev # 0, block # 1105, count 8192 ... 8192 blocks read: OK > > ## Booting kernel from Legacy Image at 40007000 ... > > Image Name: Linux-3.7.0-rc4 > > Image Type: ARM Linux Kernel Image (uncompressed) > > Data Size: 2640608 Bytes = 2.5 MiB > > Load Address: 40008000 > > Entry Point: 40008000 > > Verifying Checksum ... OK > > Loading Kernel Image ... OK > > OK > > > > Starting kernel ... > > > > Uncompressing Linux... done, booting the kernel. > > > > Error: unrecognized/unsupported machine ID (r1 = 0x00000ebe). > > > > Available machine support: > > > > ID (hex) NAME > > ffffffff SAMSUNG EXYNOS5 (Flattened Device Tree) > > > > Please check your kernel config and/or bootloader. > > > > > > I have built a DTB as described here https://wiki.linaro.org/Boards/Arndale/Setup/EnterpriseUbuntuServer and it is the last binary on the SD card. ( I dd'ed it onto the card as described in that documentation. ) > > > > However, I think the kernel fails to find the DTB and so it complains. > > > > Looking through the u-boot code, in particular lowlevel_init.S I do not see where u-boot hands the address of the DTB to the kernel? Shouldn't that be placed in register r3 as described in Documentation/arm/Booting, or am I missing something? > > > > Thanks for your help. > > > I had this one too, but I don't remember what I did wrong. Perhaps not > setting the right u-boot params. Try following this guide *carefully*: > https://wiki.linaro.org/Boards/Arndale/Setup/EnterpriseUbuntuServer I think it comes from the bootcmd environment variable. bootcmd=mmc read 40007000 451 2000;mmc read 42000000 2451 20;bootm 40007000 - 42000000 Can you explain where the offset 451 comes from? I assume that is the starting point of the kernel binary, and then 2451 is the starting point of the DTB? Can you confirm that this is this case and how it is meant to be? Or is 2451 actually the starting point of the ramdisk? Thanks for your help. _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
