Hi Peter, I'm not up on what can be done with the simple image you refer to in 1. I'm sure I should be, but there's a lot to learn.
With regards to 2, the elf image, zImage (without the elf extension), is located in arch/powerpc/boot. You can make a SystemACE file from that elf image just as you did in arch/ppc. We have a default device tree file, ml405.dts, in the arch/powerpc/boot/dts directory for our ml405 board. The kernel configuration has a config, DEVICE_TREE, that specifies the name of the device tree file. I normally compile the device tree into the kernel which is the default build, make ARCH=powerpc zImage. That image does not require a boot loader. I inserted the text below from a document that I have about building the arch/ppc and arch/powerpc kernels. Hope that helps, John Notation The phrase "<ppc or powerpc>" is used throughput the text and means that one or the other, "ppc" or "powerpc" is to be typed depending on the architecture you are building. Commands that are used in a bash shell are preceded by ">". Getting Ready To Build the Kernel This assumes you installed the ELDK tools and assumes you'll be using a bash shell. >bash >export CROSS_COMPILE=ppc_4xx- Setting Up the Kernel Tree If you have previously built this kernel for another architecture, ppc or powerpc, then the tree needs to be setup correctly for the new architecture. Assuming you have not previously built it, this does not need to be done. >make ARCH=<ppc or powerpc> mrproper Configuring the Kernel The kernel should be configured to run on the ML405 or ML507 board from Xilinx. >make ARCH=<ppc or powerpc> ml405_defconfig or >make ARCH=<ppc or powerpc> ml507_defconfig Building the Kernel The following command will build the Linux kernel assuming you are in the root directory of the kernel. The root directory of the kernel from the Xilinx Git tree is linux-2.6-xlnx. An elf file, zImage.elf, is created in the arch/ppc/boot/images directory for ppc architecture. An elf file, zImage, is created in the the arch/powerpc/boot directory for the powerpc architecture. >make ARCH=<ppc or powerpc> zImage Building the Kernel With Ramdisk A ram disk image, a file named *.gz, must be placed into the arch/ppc/boot/images or arch/powerpc/boot directory, depending on the architecture, prior to building the kernel. >make ARCH=<ppc or powerpc> zImage.initrd An elf file, zImage.initrd.elf, is created in arch/ppc/boot/images directory for the ppc architecture. An elf file file, zImage.initrd, is created in arch/powerpc/boot directory for the powerpc architecture. Generating An Ace File The elf file generated for the kernel and the bit stream can be combined to create an ACE file for compact flash. The following assumes a bash shell where XMD is accessible and a xilinx probe attached to the board for which you are generating an ace file. >xmd -tcl genace.tcl -jprog -target ppc_hw -hw <bit file name> -elf <elf file name> -board <ml405 or ml507> -ace <desired ace file name> -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Mendham Sent: Tuesday, June 24, 2008 3:02 AM To: linuxppc-embedded@ozlabs.org Subject: Linux on Virtex board with ARCH=powerpc Dear all, I'm trying to boot a 2.6.26-rc6 kernel on a custom Virtex 4 board. I have used the Xilinx utility to generate a device tree and now want to generate an image for throwing onto CF for use with a SystemACE (just like on the the ML3/4xx boards). I don't want to use a bootloader (I don't really need one). I saw something on this list about simpleImage, "simple" sounded good to me so I thought I'd try that (or did I misinterpret what this is for?). I also don't want the image to be too big, I always used to use a zImage under ARCH=ppc. So, two questions, which hopefully are easy ones: 1. I did what Grant said in a post to this list about simpleImage, and dumped my dts into arch/powerpc/boot/dts and I called it system.dts (for now). I then tried to do make simpleImage.system which ran right through to final link then moaned about a missing simpleboot-system. Where is this supposed to come from? What am I doing wrong? I naively tried copying simpleboot.o to simpleboot-system.o and the error went away. Hmm. 2. I need an ELF to give to my SystemACE file generator. This used to pop up in arch/ppc/boot/images and be called zImage.elf, which made sense to me. What's the deal now with powerpc? What should I be using? Finally, can anyone give me a heads-up on any gotchas with what I'm trying to do. As you can tell, I don't entirely know what I'm doing, so any pointers would be gratefully received. Thanks, -- Peter The University of Dundee is a Scottish Registered Charity, No. SC015096. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded