Bringing up Genode run/nested_init on a Beaglebone.

[Bob Stewart]

On 08/25/2013 01:56 PM, Alexander Tarasikov wrote:
>
>
>
> On Sun, Aug 25, 2013 at 8:18 PM, Bob Stewart <robjsstewart at ...196... 
> <mailto:robjsstewart at ...196...>> wrote:
>
>     I'm try to get a basic Genode setup working on a Beaglebone Black
>     (TI AM335x processor). I'm using a version of u-boot specifically
>     built for the Beaglebone Black from Robert Nelson's eewiki pages.
>     The only modification I made was to allow for elf file commands.
>
>
> I would suggest taking a look at github.com/ksys-labs 
> <http://github.com/ksys-labs>, we should have a tree that supports Omap3
>
>
>     Carefully following how the PandaBoard and the imx53 platforms
>     were build I successfully built from base-hw an elf image for
>     run/nested_init and loaded that onto an SDCard which contained the
>     two stages of u-boot. (Previously, I had succesfuly built a
>     helloworld test version of Fiasco.OC and successfully manually
>     booted it from an SDCard with the same MLO and u-boot.img files.
>     So the basic process of booting an elf image file works.)
>
>     The elf image is built to load and 0x81000000 with u-boot using
>     the space from start of SDRAM at 0x80000000. The elf file header
>     has an entry point address of 0x81004DC0.
>     Booting the Beagleboard into u-boot from the SDCard, manually
>     loading the elf image file to the load address above, and giving
>     it a"go" command to the entry point address, I get an "application
>     terminated" message as shown below in the console output through
>     minicom:
>     .
>
>
> I would suppose you are expected to do a "bootelf 0x81000000" to let 
> u-boot properly align the ELF sections. Otherwise, it should be 
> possible to add the "u-boot" to build.conf flags to build an uImage. 
> Either way, what I did was to take the image.bin.gz, ungzip it and 
> substract 0x8000 bytes from the address. So, I loaded it to the 
> address "0x80ff8000". Then, you can either "go" or "bootz" (if your 
> u-boot supports it).
> Take a look around here for details
> http://allsoftwaresucks.blogspot.ru/2013/05/porting-genode-to-commercial-hardware.html
>
>     .
>     .
>     *U-Boot# load mmc 0 0x81000000 image.elf**
>     **reading image.elf**
>     **604700 bytes read in 73 ms (7.9 MiB/s)**
>     **U-Boot# go 0x81004dc0**
>     **## Starting application at 0x81004DC0 ...**
>     **## Application terminated, rc = 0x8108C004**
>     **U-Boot# *
>
>     At termination, the output above shows rc to be pointed at 4 bytes
>     beyond the start of the bss section of the image.
>
>     I would have expected to see at least some Genode core debugging
>     messages, at least. Is core not being executed at the entry point?
>
>     I believe I have the Board_base stucture and cores cpu, pic,
>     platform_support, timer and tlb files correctly set up for the AM335x.
>
>     Thank you for any help you can provide.
>
>         Bob Stewart
>
>
>
>
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> -- 
> Regards, Alexander
>
>
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> Thanks for the reply Alexander. I'll build it with the u-boot in 
> spec.conf and try loading the uImage.    "bootelf" on the loadaddr 
> resulted in a data abort crash.
>
Bob

>
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