Bringing up Genode run/nested_init on a Beaglebone.

[Bob Stewart]

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.

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:
.
.
.
*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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