* [ECOS] Problems with the PowerPC simulator
@ 1999-11-04 12:39 Bernd Sprenger
1999-11-05 1:28 ` Jesper Skov
0 siblings, 1 reply; 2+ messages in thread
From: Bernd Sprenger @ 1999-11-04 12:39 UTC (permalink / raw)
To: ecos-discuss
I have a problem using eCos together with the PowerPC simulator (and
GDB). I have installed the sourceware distribution of ecos-1.2.1 and
ecosSWtools-990319. Everything went smoothly.
I configured eCos for: --target=powerpc --platform=sim --startup=ram
When I try to run the tutorial I encounter a problem with the powerpc
simulator and gdb
(ecos-1.2.1/doc/tutorials/ecos-tutorial/run-an-ecos-test-case.html):
>powerpc-eabi-run install/tests/kernel/bin_sem0
core_find_mapping() - access to unmaped address, attach a default
map to handle this - addr=0xf000101a nr_bytes=0x1 processor=
0x40118008 cia=0x55b4
The same happens when running with gdb.
I debugged this test program and found out, that the error happens in
the macro HAL_DIAG_WRITE_CHAR defined in the file
ecos-1.2.1/packages/hal/powerpc/sim/v1_2_1/include/hal_diag.h:
#define OEA_DEV 0xf0001000
#define HAL_DIAG_WRITE_CHAR(_c_) \
CYG_MACRO_START \
volatile unsigned char *tty_buffer = \
(unsigned char*)(OEA_DEV + PAL_WRITE_FIFO); \
volatile unsigned char *tty_status = \
(unsigned char*)(OEA_DEV + PAL_WRITE_STATUS); \
unsigned long __state; \
\
HAL_DISABLE_INTERRUPTS(__state) \
if( _c_ != '\r' ) \
{ \
while( *tty_status == 0 ) continue; \
*tty_buffer = _c_; \
} \
HAL_RESTORE_INTERRUPTS(__state); \
CYG_MACRO_END
This lead me to the realization, that the simulated hardware in psim
might not be the one required by eCos. Searching the hal source code
I found the file ecos-1.2.1/packages/hal/powerpc/sim/v1_2_1/runtime/tree
with the following content:
/#address-cells 1
/openprom/init/register/pc 0x100
/iobus@0xf0000000/reg 0xf0000000 0x01000000
/iobus/pal@0xf0001000/reg 0xf0001000 32
Using this definition I was able to run the test program via the
following command line:
>powerpc-eabi-run -o '/#address-cells 1' \
-o '/openprom/init/register/pc 0x100' \
-o '/iobus@0xf0000000/reg 0xf0000000 0x01000000' \
-o '/iobus/pal@0xf0001000/reg 0xf0001000 32' \
install/tests/kernel/bin_sem0
The same is true for the gdb using these paramaters when selecting the
target.
Now my question:
Is there a possibility to configure psim that it uses this device-tree
by default?
Is there a better documentation of psim available than the files its
source directory
(Bugs, Install, Readme, Run and Psim.texinfo)?
Thanks a lot for your help,
Bernd
sprenger@robotics.stanford.edu
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [ECOS] Problems with the PowerPC simulator
1999-11-04 12:39 [ECOS] Problems with the PowerPC simulator Bernd Sprenger
@ 1999-11-05 1:28 ` Jesper Skov
0 siblings, 0 replies; 2+ messages in thread
From: Jesper Skov @ 1999-11-05 1:28 UTC (permalink / raw)
To: Bernd Sprenger; +Cc: ecos-discuss
>>>>> "Bernd" == Bernd Sprenger <sprenger@Robotics.Stanford.EDU> writes:
Bernd> Using this definition I was able to run the test program via
Bernd> the following command line:
>> powerpc-eabi-run -o '/#address-cells 1' \
Bernd> -o '/openprom/init/register/pc 0x100' \ -o
Bernd> '/iobus@0xf0000000/reg 0xf0000000 0x01000000' \ -o
Bernd> '/iobus/pal@0xf0001000/reg 0xf0001000 32' \
Bernd> install/tests/kernel/bin_sem0
This can be reduced to:
-o '/iobus/pal@0xf0001000/reg 0xf0001000 32'
Bernd> The same is true for the gdb using these paramaters when
Bernd> selecting the target.
Bernd> Now my question:
Bernd> Is there a possibility to configure psim that it uses this
Bernd> device-tree by default?
I don't know, but it shouldn't really matter. In GDB you can make a
macro instead of typing in the runes by hand (as suggested in the
Getting Started Guide). For the stand-alone simulator you can create a
shell alias or a shell script with the necessary runes.
Bernd> Is there a better documentation of psim available than the
Bernd> files its source directory (Bugs, Install, Readme, Run and
Bernd> Psim.texinfo)?
There's sourceware.cygnus.com/psim, but I suspect it's the same
documentation as distributed with the sources.
Jesper
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