Testing Fiasco.OC+L4re on ODROID-X2(Exynos4412)

Adam Lackorzynski adam at os.inf.tu-dresden.de
Mon May 11 00:18:22 CEST 2015


On Tue May 05, 2015 at 01:28:46 -0400, Reinier Millo Sánchez wrote:
> 
> Hi Adam
> >>>    FPU0: Arch: VFPv3(3), Part: VFPv3(30), r: 4, v: 9, i: 41, t: hard,
> >>>    p: dbl/sngl
> >>>
> >>>    KERNEL: Warning: No page-fault handler for 0xee202214, error
> >>>    0x94000848, pc f0039420
> >>>
> >>>Somebody have tested Fiasco.OC+L4re on ODROID-X2 or another Exynos 4412
> >>>platform?
> >On this platform this seems to be some pattern. However, last time I
> >tried it worked for me. So, hmm, could you try another compiler version
> >and see if it changes behavior? Maybe this gives us some hints.
> I'm using a linaro toolchain
> (gcc-linaro-arm-linux-gnueabihf-4.8-2014.03_x86_64). I have tried the
> arm-none-eabi toolchain in Debian repository but fails compiling the
> snapshot.
> I have made some progress trying to run FiascoOC+L4re on Odroid-X2. There
> are some changes that I have made:
> I have modified the file "l4/mk/platforms/exynos4.conf" adapting Exynos4's
> platform to Odroid-X2. In this case the RAM size differs (Odroid-X2 have
> 2Gb). In this file I have configured the UART for serial output (I'm using
> UART 1).
> 
>    PLATFORM_RAM_BASE       = 0x40000000
>    -  PLATFORM_RAM_SIZE_MB  = 1024
>    + PLATFORM_RAM_SIZE_MB  = 2047
>    + PLATFORM_UART_NR          = 1
> 
> Booting the generated image I have detected that bootstrap's server is not
> using UART 1 for output. I have modified the "init" function on
> "l4/pkg/bootstrap/server/src/platform/exynos.cc"  to use the configured UART
> on the platform file modified above.
> 
>    unsigned long uart_base;
>    -  unsigned uart_nr = 2;
>    + unsigned uart_nr = PLATFORM_UART_NR;
> 
> I have tried to compile and test the image on the Odroid-X2, but fails the
> execution, this is the serial output:
> 
>    L4 Bootstrapper
>       Build: #18 Sat May  2 15:56:00 CDT 2015, 4.8.3 20140303 (prerelease)
>       Scanning up to 2047 MB RAM, starting at offset 32MB
>       Memory size is 2047MB (40000000 - bfefffff)
>       Limiting 'RAM' region   [ 40000000,  bfefffff] { 7ff00000} to [
>    40000000,  bcffffff] { 7d000000} due to 3024 MB address limit
>       RAM: 0000000040000000 - 00000000bcffffff: 2048000kB
>       Total RAM: 2000MB
>       Scanning fiasco
>       Scanning sigma0
>       Scanning moe
>       Moving up to 5 modules behind 41100000
>       moving module 02 { 410b4000-410e565f } -> { 411a5000-411d665f }
>    [202336]
>       moving module 01 { 410aa000-410b3377 } -> { 4119b000-411a4377 }
>    [37752]
>       moving module 00 { 41043000-410a9daf } -> { 41134000-4119adaf }
>    [421296]
>       moving module 04 { 41029000-410425b3 } -> { 4111a000-411335b3 }
>    [103860]
>       moving module 03 { 4100f000-41028493 } -> { 41100000-41119493 }
>    [103572]
>       Loading fiasco
>       Loading sigma0
>       Loading moe
>       find kernel info page...
>       found kernel info page at 0x40002000
>    Regions of list 'regions'
>         [ 40000000,  400000e3] {       e4} Root   mbi_rt
>         [ 40001000,  40001aff] {      b00} Kern   fiasco
>         [ 40002000,  40076fff] {    75000} Kern   fiasco
>         [ 40090000,  4009681b] {     681c} Sigma0 sigma0
>         [ 40098000,  4009e177] {     6178} Sigma0 sigma0
>         [ 40140000,  4018b4ab] {    4b4ac} Root   moe
>         [ 41000000,  4100e4ff] {     e500} Boot   bootstrap
>         [ 41100000,  41133fff] {    34000} Root   Module
>       API Version: (87) experimental
>       Sigma0 config    ip:40090100 sp:00000000
>       Roottask config  ip:4014020c sp:00000000
>       Starting kernel fiasco at 400012c8
>    Hello from Startup::stage2
>    Per_cpu_data_alloc: (orig: 0xf0063a50-0xf00644d0)
>    Number of IRQs available at this GIC: 160
>    FPU0: Arch: VFPv3(3), Part: VFPv3(30), r: 4, v: 9, i: 41, t: hard,
>    p: dbl/sngl
> 
>    KERNEL: Warning: No page-fault handler for 0xee202214, error
>    0x94000848, pc f0039420
> 
> I have been testing and changing the compiling configuration. Using the
> below configuration to compile Fiasco.OC, the system boots and hangs at
> "Calibrating timer loop...":
> 
>    Platform Timer -> Multi-core timer
>    Use ExtGic -> True
>    Execution Model -> TrustZone normal side
>    Secure Monitor Interface -> Mobicore
>    Enable multi processor support -> True
>    Maximal supported number of CPUs -> 4

Interesting. What's the difference to the previos config?

> This is the serial output when tested the image on Odroid-X2:
>    Calibrating timer loop...
> 
> I think that the problem now is with the Exynos4's Timers, but i have been
> reviewing the implementations and it seems fine.
> Is there anything wrong on my configuration or somebody have any idea?

Does the counter of the timer count, i.e. multiple reads return
different values?



Adam
-- 
Adam                 adam at os.inf.tu-dresden.de
  Lackorzynski         http://os.inf.tu-dresden.de/~adam/



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