TI LaunchPad 120XL BSP issue.

[Sebastian Huber]

Hello Karel,

with 32KiB RTEMS will only run with a careful chosen configuration.  The POSIX 
threads use 8KiB stack by default on ARM, so you run quickly out of memory if 
you use this.

Please have a look at the Configuration global variable with the debugger.  It 
tells you the size estimates for a given configuration.

On 2013-08-11 20:42, Karel Gardas wrote:
>
> Hello,
>
> I'm adopting LM369xx BSP to work on LM4F120XL Lanchpad board. The board does
> have Cortex-M4F CPU with 256 kB flash, 32 kB RAM and 2 kB EEPROM. I've
> successfully run RTEMS hello world on it already so now I'm on ticker.exe
> hacking. I'm debugging it since it always fails with following backtrace:
>
> (gdb) where
> #0  _Workspace_Handler_initialization (areas=0x200010c8, area_count=1,
> extend=0x0 <bsp_start_vector_table_begin>) at
> /export/home/karel/vcs/rtems/c/src/../../cpukit/score/src/wkspace.c:89
> #1  0x00001180 in bsp_work_area_initialize_default (area_begin=0x20002938,
> area_size=22216) at ../../../../../.././lm4f120/lib/include/bsp/bootcard.h:176
> #2  0x000011d0 in bsp_work_area_initialize () at
> /export/home/karel/vcs/rtems/c/src/lib/libbsp/arm/lm3s69xx/../../shared/bspgetworkarea.c:57
>
> #3  0x00001122 in boot_card (cmdline=0x0 <bsp_start_vector_table_begin>) at
> /export/home/karel/vcs/rtems/c/src/lib/libbsp/arm/lm3s69xx/../../shared/bootcard.c:101
>
> #4  0x00000116 in bsp_start_hook_0_done () at
> /export/home/karel/vcs/rtems/c/src/lib/libbsp/arm/lm3s69xx/../shared/start/start.S:311
>
> #5  0x00000116 in bsp_start_hook_0_done () at
> /export/home/karel/vcs/rtems/c/src/lib/libbsp/arm/lm3s69xx/../shared/start/start.S:311
>
> Backtrace stopped: previous frame identical to this frame (corrupt stack?)
> (gdb)
>
>
> I don't know workspace manager at all so I'm curious what's so big problem that
> there is probably some remaining unallocated RAM? I.e. remaining is > 0 ? At
> least I hope I interpret this well...
>
> Thanks!
> Karel
>
> PS: I've configured rtems with --enable-posix --enable-samples --disable-itron
> --target=arm-rtemseabi --disable-networking --enable-rtemsbsp=lm4f120 -- and
> I'm curious if 32 kB RAM is not enough for POSIX?
>
> PPS: I'm using RTEMS HEAD as of Friday last week and of course one I get this
> working I'll submit my changes for inclusion as the TI LaunchPad is really nice
> and cheap board to experiment with RTEMS.
>
> PPPS: linkcmds.lm4f120 looks:
>
> /**
>   * @file
>   *
>   * @brief Memory map.
>   */
>
> MEMORY {
>      RAM_INT (AIW) : ORIGIN = 0x20000000, LENGTH = 32K
>      ROM_INT (RX)  : ORIGIN = 0x00000000, LENGTH = 256K
> }
>
> REGION_ALIAS ("REGION_START", ROM_INT);
> REGION_ALIAS ("REGION_VECTOR", RAM_INT);
> REGION_ALIAS ("REGION_TEXT", ROM_INT);
> REGION_ALIAS ("REGION_TEXT_LOAD", ROM_INT);
> REGION_ALIAS ("REGION_RODATA", ROM_INT);
> REGION_ALIAS ("REGION_RODATA_LOAD", ROM_INT);
> REGION_ALIAS ("REGION_DATA", RAM_INT);
> REGION_ALIAS ("REGION_DATA_LOAD", ROM_INT);
> REGION_ALIAS ("REGION_FAST_TEXT", RAM_INT);
> REGION_ALIAS ("REGION_FAST_TEXT_LOAD", ROM_INT);
> REGION_ALIAS ("REGION_FAST_DATA", RAM_INT);
> REGION_ALIAS ("REGION_FAST_DATA_LOAD", ROM_INT);
> REGION_ALIAS ("REGION_BSS", RAM_INT);
> REGION_ALIAS ("REGION_WORK", RAM_INT);
> REGION_ALIAS ("REGION_STACK", RAM_INT);
>
> INCLUDE linkcmds.armv7m
>
> _______________________________________________
> rtems-devel mailing list
> rtems-devel at rtems.org
> http://www.rtems.org/mailman/listinfo/rtems-devel


-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber at embedded-brains.de
PGP     : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.