Re: Booting base-hw image on a Freescale i.MX6

29 Jan 2014

      Hello all,
Genode base-hw kernel runs successfully on i.MX6. Stefan: we were looking
at the wrong UART port (1 instead of 2) which led us on a wild goose chase.
And we set the GPIO pins directly by setting IOMUX to GPIO mode: we lit a
LED bulb successfully. The driver, as you mentioned is quite complex.
We're getting the following message for test-printf ::
Starting kernel ...
int main(): --- create local services ---
int main(): --- start init ---
int main(): transferred 1020 MB to init
int main(): --- init created, waiting for exit condition ---
[init] Could not open file "ld.lib.so"
[init -> test-printf] -1 = -1 = -1
[init] virtual void Genode::Child_policy::exit(int): child exited with exit
value 0
We ran nested_init to verify again and got the following::
int main(): --- create local services ---
int main(): --- start init ---
int main(): transferred 1021 MB to init
int main(): --- init created, waiting for exit condition ---
[init] Could not open file "ld.lib.so"
[init] parent provides
[init]   service "ROM"
[init]   service "RAM"
[init]   service "CAP"
[init]   service "PD"
[init]   service "RM"
[init]   service "CPU"
[init]   service "LOG"
[init]   service "SIGNAL"
[init] child "init"
[init]   RAM quota:  10223616
[init]   ELF binary: init
[init]   priority:   0
[init -> init] Could not open file "ld.lib.so"
[init -> init] parent provides
[init -> init]   service "ROM"
[init -> init]   service "RAM"
[init -> init]   service "CAP"
[init -> init]   service "PD"
[init -> init]   service "RM"
[init -> init]   service "CPU"
[init -> init]   service "LOG"
[init -> init]   service "SIGNAL"
[init -> init] child "init"
[init -> init]   RAM quota:  4980736
[init -> init]   ELF binary: init
[init -> init]   priority:   0
[init -> init -> init] Could not open file "ld.lib.so"
[init -> init -> init] parent provides
[init -> init -> init]   service "ROM"
[init -> init -> init]   service "RAM"
[init -> init -> init]   service "CAP"
[init -> init -> init]   service "PD"
[init -> init -> init]   service "RM"
[init -> init -> init]   service "CPU"
[init -> init -> init]   service "LOG"
[init -> init -> init]   service "SIGNAL"
[init -> init -> init] No children to start
One, Are these satisfactory messages? (Are the test scripts running as they
should) Two, Why does test-printf not work when I try to print
Genode::printf("Hello World!"); and consequently set run_genode_until
"Hello World!" 10 (or {Hello World!} 10). [init -> test-printf] does not
get initialized.
Regards
Aditya.
On Mon, Jan 20, 2014 at 8:35 PM, Stefan Kalkowski <
stefan.kalkowski@...1...> wrote:
...
Hi Meenakshi,
On 01/18/2014 09:16 AM, Meenakshi Narayanan wrote:
...
Hi Stefan,
I'm working with Aditya on the port. We're now trying to blink an LED at
the start of execution of the kernel (at the place where you asked us to
print a PDBG), since the JTAG is going to take a while. We've tried using
i.MX53's GPIO driver by modifying the register addresses in board_base.h.
well, I don't think this is the way to success.
Because you didn't finished to get some output from the UART, possibly
because your kernel image isn't setup correctly, you're now trying to
rope the far more complex GPIO driver code into the kernel? As long as
things are working similar like within the i.MX53 SoC, moreover the GPIO
pins depend on a correctly configured IOMUX controller, which is a ball
of wires. Just to give you some complexity metric between both in form
of reference manual pages, the IOMUX controller comprises 800 pages, and
the UART about 80. To sum it up, setting up GPIO pins correctly is a far
more error-prone task than setting up the UART on this platform.
What about my advices within the last mail, compiling your own u-boot,
thereby having the ability to better check the setup of your kernel
(e.g. via additional prints), and not initializing the UART within the
kernel, because it's already done successfully by u-boot?
Moreover, you might start with a very easy binary (no complete Genode
kernel/image), which you write from scratch. That binary can be some
very simple assembler code, which only puts some character to the UART,
and nothing more. If that fails too, it's probably a boot issue, which I
would guess it is.
...
Basically, we need to write to the GPIO9 (GPIO1_IO09 in i.MX6) : Can this
be accomplished by calling the read/write/direction functions in driver.h
of os/src/driver/gpio. Or can we simply write to a register by
implementing
...
util/mmio.h?
Of course, you can use the classes in "util/mmio.h" to simply access I/O
memory mapped registers. In fact, the MMIO framework is designed for
that operation purpose.
The code in "os/src/driver/gpio" is used for the user-level GPIO driver
in Genode, and cannot be used directly within the base-hw kernel.
Regards
Stefan
...
Thanks and regards
Meenakshi
On Thu, Jan 9, 2014 at 3:14 PM, Stefan Kalkowski <
stefan.kalkowski@...1...> wrote:
...
Hi Aditya,
On 01/09/2014 08:30 AM, Aditya Kousik wrote:
...
Hello Stefan,
I was looking for alternate methods of running the program loaded at
address 10001000. That was the only motive behind trying go. I kept
using
...
...
...
bootm till then. I wasn't exactly able to check where u-boot loaded its
own
...
memory sections. So instead, I set the load address for the kernel way
above at 20000000 where I'm sure nothing else clashed. And loaded the
uImage to 20800000.
I recommend using a self-compiled u-boot on you imx6 board. Therefore,
you'll be able to check its memory regions.
...
While it's still stuck at  'Starting kernel...' , I'll take your
previous
...
...
...
advice seriously. To use a JTAG debugger or recheck the UART
definitions.
...
...
Moreover, you might skip the UART initialization routine. Just comment
the body of the Imx31_uart_base constructor out in:
base/include/drivers/uart/imx31_uart_base.h
The UART should be initialized by u-boot anyway.
Of course, if you've a JTAG debugger present, and a corresponding
connector on your test board, this probably will be the most comfortable
path.
...
I ran test-printf on linux and this is what I got:
spawn ./core
int main(): --- create local services ---
int main(): --- start init ---
int main(): transferred 17592186044415 MB to init
int main(): --- init created, waiting for exit condition ---
[init] Could not open file "ld.lib.so"
Quota exceeded! amount=4096, size=4096, consumed=4096
[init] upgrading quota donation for SIGNAL session
[init -> test-printf] -1 = -1 = -1
Test succeeded
Am I supposed to get similar messages from core on my board?
Yes that's right.
Regards
Stefan
...
Thanks in advance
Aditya
On Mon, Jan 6, 2014 at 3:28 PM, Stefan Kalkowski <
stefan.kalkowski@...1...> wrote:
...
Hi Aditya,
On 01/06/2014 09:18 AM, Aditya Kousik wrote:
...
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?
Well, I can't follow your conclusions to not using bootm? You've a
complete scenario packed into an ELF image, which is built to be
loaded
...
...
...
...
at start address 0x10001000. This ELF image is used by u-boot's
mkimage
...
...
...
...
utility to form a uImage file. This uImage can be loaded to some
address
...
...
...
...
above 0x10300000 e.g. via TFTP like you did it.
Assuming you've loaded the uImage to 0x10800000, you should boot the
scenario with "bootm 0x10800000". After that u-boot will interpret the
uImage header at that address, load the ELF image within the uImage to
the appropriated memory sections, prepare the machine registers, and
finally jump to 0x10001000.
...

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"
Using the 'go XXX' command let u-boot simply load that address into
the
...
...
...
...
ip register. As you've loaded an uImage to the related address, the
machine executes the u-boot image header information, which of course
fails. Even if you load the ELF image by hand to the appropriated
memory
...
...
...
...
sections, it is not recommended to use the 'go' command, as u-boot
doesn't prepare the machine as expected. For instance, the kernel gets
executed with the MMU enabled using u-boot's page-table setup etc.
...
What is the sequence of events, the programs that are sequentially
executed
...
to say that the kernel is 'running'?
In your case I assume:
tftp 0x10800000 <network path to uImage>
  bootm 0x10800000
One further problem might be that u-boot's own memory sections (binary
data, exception vector) clashes with the scenario ones. Unfortunately,
mostly u-boot doesn't warn you if it fails to load the whole image due
to memory clashes. Therefore, it would be good, if it's possible to
you,
...
...
...
...
to analyze the memory layout of the u-boot binary used on your
platform,
...
...
...
...
e.g.: "readelf -S <u-boot binary>"
If there's a clash you can change the "LD_TEXT_ADDR" variable in
"base-hw/mk/spec-hw_imx6.mk" to another non-clashing address.
Regards
Stefan
...
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
>

...
...
...
...
...
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

...
...
...
CenturyLink Cloud: The Leader in Enterprise Cloud Services.
Learn Why More Businesses Are Choosing CenturyLink Cloud For
Critical Workloads, Development Environments & Everything In Between.
Get a Quote or Start a Free Trial Today.
http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.cl...
...
...
...

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/

...
...
CenturyLink Cloud: The Leader in Enterprise Cloud Services.
Learn Why More Businesses Are Choosing CenturyLink Cloud For
Critical Workloads, Development Environments & Everything In Between.
Get a Quote or Start a Free Trial Today.
http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.cl...
...
...

Genode-main mailing list
Genode-main@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/genode-main

...
CenturyLink Cloud: The Leader in Enterprise Cloud Services.
Learn Why More Businesses Are Choosing CenturyLink Cloud For
Critical Workloads, Development Environments & Everything In Between.
Get a Quote or Start a Free Trial Today.
http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.cl...
...

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/

CenturyLink Cloud: The Leader in Enterprise Cloud Services.
Learn Why More Businesses Are Choosing CenturyLink Cloud For
Critical Workloads, Development Environments & Everything In Between.
Get a Quote or Start a Free Trial Today.
http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.cl...
_______________________________________________
Genode-main mailing list
Genode-main@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/genode-main

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

Re: Booting base-hw image on a Freescale i.MX6