Hello World Error...

[Madhu Raju]

Hi,
I still haven't been able to figure out the problem.
But Have I configured the RTEMS properly?
I have a Dy4 DMV 177 SBC with powerpc.And I want to install RTEMS on my linux
machine and download the application from this machine on to the board.

I used the following configure command..
../rtems-ss-20020528/configure --target=powerpc-rtems --disable-posix
--enable-tcpip --disable-cxx --enable-rtemsbsp=dmv177 --prefix=/opt/rtems


Is this correct?

Thanking you,
Madhu

>===== Original Message From Till Straumann <strauman at SLAC.Stanford.EDU> =====
>AFAIK, the 603e has no hardware TLB replacement,
>so the pte121 implementation for using the page
>hash table and the TLBs doesn't work. The pte121
>"driver" I contributed only can be used on 604 and up.
>(And software reloading the TLBs is perhaps not
>really wise on a RTOS anyways).
>
>The easiest way is using the BATs. Load up your
>BATs to get mappings for everything you need
>prior to doing _CPU_MSR_SET()
>
>(You need IBAT and DBAT mappings for your
>physical memory and more DBAT mappings for
>all the devices, PCI space and VME space
>you want do access. Since you only have
>4 DBATs, you might have to rearrange your
>PCI configuration etc.)
>
>Look at the motorola_powerpc (under libbsp/powerpc/shared)
>BSP how they do it...
>
>
>HTH
>
>-- Till
>
>Madhu Raju wrote:
>> Hi,
>> How do I initialize the MMU and let the RTEMS config know where it is?
>>
>> Thanks for helping,
>> Madhu
>>
>>
>>
>>>===== Original Message From Till Straumann <strauman at SLAC.Stanford.EDU>
=====
>>>Hmm - I do not know that BSP at all.
>>>However, a look at 'bspstart.c' reveals
>>>
>>>
>>>void bsp_start( void )
>>>{
>>>  unsigned char *work_space_start;
>>>  unsigned int  msr_value = 0x2030;
>>>
>>>  /*
>>>   * Set BSP to initial value. Note: This value is a guess
>>>   * check how the real board comes up. This is critical to
>>>   * getting the source to work with the debugger.
>>>   */
>>>
>>>  _CPU_MSR_SET( msr_value );
>>>
>>>
>>>Probably, your MMU is not initialized and reading the
>>>instruction following CPU_MSR_SET() (which enables the MMU)
>>>crashes for lack of a valid address translation.
>>>
>>>HTH
>>>-- Till
>>>
>>>Madhu Raju wrote:
>>>
>>>>===== Original Message From Joel Sherrill <joel.sherrill at oarcorp.com>
=====
>>>>Madhu Raju wrote:
>>>>
>>>>Hi,
>>>>I have configured RTEMS for dmv177 bsp for powerpc.I did that
succesfully.I
>>>>downloaded a hello world application onto SVME/DMV-177 PowerPC 603e Single
>>>>Board Computer using minicom.When i try to execute the application, I get
>>>>
>>>
>>>the
>>>
>>>
>>>>following error:
>>>>
>>>>Exception 0400:  Instruction Access Exception
>>>>     SRR0(pc) 00041A10   SRR1(msr) 10002030
>>>>
>>>>
>>>>I found out from Hello.num and hello.dump that the instruction is
>>>>
>>>>000419ec T bsp_start
>>>>
>>>>Could anyone please help me solve this problem?
>>>>
>>>>I have no guesses but recommend using powerpc-rtems-objdump -da to find
>>>>out
>>>>what instruction is at 00041A10.  That would give a clue as to what
>>>>happened.
>>>>
>>>>One thing I do see is that the linkcmds assumes 32M of RAM.  If this
>>>>doesn't
>>>>match your board, it could be accessing non-existent memory.
>>>>
>>>>I haven't heard a report on this BSP in a long time.  Please keep us
>>>>posted.
>>>>
>>>>
>>>>Thanks,
>>>>
>>>>Madhu
>>>>
>>>
>>>
>>>The instruction at 41A10 is
>>> 41a10:	80 87 00 04 	lwz	r4,4(r7)
>>>
>>>Can the problem be guessed using this instruction information?
>>>
>>>Thanks,
>>>Madhu
>>>
>>>
>>>
>>
>>