Hello Stefan,
I added the print debug call inside extern "C" void kernel() function as you'd suggested. Still no response from the processor.
I checked the address specifications in both Imx31_uart_base.h and also base/include/platform/imx6/board_base.h in Nikolay's branch. They are correct, to the dot. Even AIPS mapping in board.h in base-hw's core. The definitions seem to be fine.
Ideally, what is expected to happen, i.e, the expected course of action? we can't load the kernel by running 'bootm' since you say it uses a different config. So what do we do with the uImage?
1. I loaded the uImage to 0x10800000 with TFTP as 'tftp 10800000'. It succesfully loaded the kernel to that address. At this point, I had changed the load address to 10002000 to check if the image was read properly. It did. 2. As a different approach, ran 'go 10002000'. This was what I got "##Application started at 0x10002000, Application terminated, rc = 0x100A4004"
What is the sequence of events, the programs that are sequentially executed to say that the kernel is 'running'?
Thanks in advance Aditya Kousik
On Thu, Jan 2, 2014 at 4:33 PM, Stefan Kalkowski < stefan.kalkowski@...1...> wrote:
Hi,
On 01/02/2014 08:52 AM, Aditya Kousik wrote:
Hello all,
We've tried to run a basic test-printf script on a Freescale i.MX6 sabrelite board. Based on thishttp://sourceforge.net/p/genode/mailman/message/31760885/, we implemented the necessary files. We had also come across an i.MX6
branch
by Nikolay Golikov stating that he had a preliminary port of i.MX6 here: https://github.com/decaprox/genode/tree/i.mx6
We ran RUN_OPT="--target=uboot" make run/printf to see if it does print
"-1
= -1 = -1" to the serial console (tested with gtkterm).
We ran the boot image uImage through TFTP at load address 0x10800000. It loads the kernel (267.9 kB) but stops at "Loading kernel".
Assuming, your resulting kernel image is linked to 0x10001000, and ends at about 0x102cbc55, like the result I got when compiling Nikolay's branch, your load address for the u-boot uImage sounds reasonable. Unfortunately, I can't reproduce your experiments, because I don't have such a board available. The first thing that comes to my mind is, that Nikolay used another board containing the i.MX6 SoC than you with another memory layout of the related peripherals.
How do we know if the kernel is indeed running, or are we checking the right UART ports? (we checked UART1)
First at all, you should add a printf command like:
PDBG("kernel started!")"
at the very beginning of the kernel's execution. In Nikolay's branch I would add it here:
https://github.com/decaprox/genode/blob/i.mx6/base-hw/src/core/kernel.cc#L13...
If that message isn't printed, very likely your UART definitions aren't correct.
I gave "console=ttymxc0, 115200" as bootargs in u-boot. Any suggestions
on
how to proceed? Because we are literally stuck.
Forget about "bootargs" in u-boot. They are specific to booting the Linux kernel. U-boot puts them into the Linux/ARM specific ATAG structure. In Genode that structure isn't used. It's hard coded in the kernel, which UART is used for kernel/core debug messages. In Nikolay's branch, he uses the UART with memory mapped I/O located at 0x02020000, and with the following UART definition:
https://github.com/decaprox/genode/blob/i.mx6/base/include/drivers/uart/imx3...
Please check whether this corresponds with your board's definitions.
Also, is there a good debugging tool for testing the genode environment
on
direct hardware?
Well, there is JTAG of course, which isn't related to Genode specifically. There are other debugging utils available on Genode, like GDB, but that wouldn't help on that low level you're currently working at.
Regards Stefan
Thanks in advance Aditya Kousik
Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into
your
Java,.NET, & PHP application. Start your 15-day FREE TRIAL of
AppDynamics Pro!
http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clk...
Genode-main mailing list Genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
-- Stefan Kalkowski Genode Labs
http://www.genode-labs.com/ · http://genode.org/
Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clk... _______________________________________________ Genode-main mailing list Genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main