On Tue, Dec 4, 2012 at 6:18 AM, James White <james.white.2012@xxxxxxxxxxx> wrote: > > > > ---------------------------------------- >> 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? > This relates to your dd commands, 451 is actually hex, 0x451 :) -Christoffer _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
