[ECOS] eCos application offset for Redboot load

[ECOS] eCos application offset for Redboot load

[gmail]

I am trying to build an eCos application (and the test suite) to load 
onto a board with a Redboot monitor.

I've created an  xxx_ram.ldi / .h for the board but don't know if I need 
to add in the offset in that file for the Redboot monitor or if that is 
done elsewhere.

The monitor indicates:
Platform: TS-7250 Board (ARM920T) Rev A
Copyright (C) 2000, 2001, 2002, 2003, 2004 Red Hat, Inc.

RAM: 0x00000000-0x02000000, [0x000530c0-0x01fdd000] available
FLASH: 0x60000000 - 0x68000000, 1024 blocks of 0x00020000 bytes each.

Do I change the text base in the .ldi to something above 0x000530c0?

Thanks


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Re: [ECOS] eCos application offset for Redboot load

[Gary Thomas]

On 2011-08-08 17:25, gmail wrote:
> I am trying to build an eCos application (and the test suite) to load onto a board with a Redboot monitor.
>
> I've created an xxx_ram.ldi / .h for the board but don't know if I need to add in the offset in that file for the Redboot monitor or if that is done elsewhere.
>
> The monitor indicates:
> Platform: TS-7250 Board (ARM920T) Rev A
> Copyright (C) 2000, 2001, 2002, 2003, 2004 Red Hat, Inc.
>
> RAM: 0x00000000-0x02000000, [0x000530c0-0x01fdd000] available
> FLASH: 0x60000000 - 0x68000000, 1024 blocks of 0x00020000 bytes each.
>
> Do I change the text base in the .ldi to something above 0x000530c0?

Yes, e.g. 0x80000 would be suitable.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

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Re: [ECOS] eCos application offset for Redboot load

[gmail]

On 8/8/2011 5:51 PM, Gary Thomas wrote:
> On 2011-08-08 17:25, gmail wrote:
>> I am trying to build an eCos application (and the test suite) to load 
>> onto a board with a Redboot monitor.
>>
>> I've created an xxx_ram.ldi / .h for the board but don't know if I 
>> need to add in the offset in that file for the Redboot monitor or if 
>> that is done elsewhere.
>>
>> The monitor indicates:
>> Platform: TS-7250 Board (ARM920T) Rev A
>> Copyright (C) 2000, 2001, 2002, 2003, 2004 Red Hat, Inc.
>>
>> RAM: 0x00000000-0x02000000, [0x000530c0-0x01fdd000] available
>> FLASH: 0x60000000 - 0x68000000, 1024 blocks of 0x00020000 bytes each.
>>
>> Do I change the text base in the .ldi to something above 0x000530c0?
>
> Yes, e.g. 0x80000 would be suitable.
>
Thanks.

I am now hitting another issue that doesn't make sense...

While stepping through one of the test programs w/ gdb, in the vectors.S 
file hal_hardware_init is being called which in turn calls 
hal_mmu_init() which looks like is halting the program.

If I am trying to run a program loaded into ram via redboot, shouldn't 
the hardware (or at least the MMU) initialization be skipped? Isn't it 
going to wipe out RAM?

Thanks for listening... :-)

--JJ--

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