[ECOS] Board Speed of MPC8555 processor

[ECOS] Board Speed of MPC8555 processor

[Dileep Kumar]

Hi,
I am new to eCos.
In the CDL file for VADS , " hal_powerpc_vads.cdl " , there is  an option
 cdl_option CYGHWR_HAL_POWERPC_BOARD_SPEED,

Can you tell me what is the board speed for  MPC8555 processor ?
 The underlying board is AMC channel card.

Thanks
Dileep Kumar

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[ECOS] Is there any issue with eCOS running on 512 or 1GB of memory

[Domegan, Patrick]

Hi,

Is there any issue with eCOS running on 512 or 1GB of memory?

Thanks
Patrick


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Re: [ECOS] Is there any issue with eCOS running on 512 or 1GB of memory

[Andrew Lunn]

On Fri, May 02, 2008 at 02:35:04PM -0400, Domegan, Patrick wrote:
> Hi,
> 
> Is there any issue with eCOS running on 512 or 1GB of memory?

What architecture? Since you are AMD i presume you mean i386?

I don't know of any problems, but i've not tried it myself.

  Andrew

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[ECOS] Is there any issue with eCOS running on 512 or 1GB ofmemory

[Domegan, Patrick]

Andrew,

Sorry I mean MIPS core, specifically MIPS 4KEc

Thanks
Patrick

-----Original Message-----
From: Andrew Lunn [mailto:andrew@lunn.ch] 
Sent: Friday, May 02, 2008 2:44 PM
To: Domegan, Patrick
Cc: ecos-discuss@sourceware.org
Subject: Re: [ECOS] Is there any issue with eCOS running on 512 or 1GB
ofmemory

On Fri, May 02, 2008 at 02:35:04PM -0400, Domegan, Patrick wrote:
> Hi,
> 
> Is there any issue with eCOS running on 512 or 1GB of memory?

What architecture? Since you are AMD i presume you mean i386?

I don't know of any problems, but i've not tried it myself.

  Andrew



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Re: [ECOS] Is there any issue with eCOS running on 512 or 1GB ofmemory

[Nick Garnett]

"Domegan, Patrick" <Patrick.Domegan@amd.com> writes:

> Andrew,
> 
> Sorry I mean MIPS core, specifically MIPS 4KEc

In the case of MIPS you will have to deal with the kseg0/1 segment
size limits. From memory these are limited to 512MB. So if you have
more RAM, you would have to set up the MMU to map the excess into
useg. eCos generally doesn't use the MMU in MIPS targets, so there is
little example code, but you should be able to map everything using
one or two TLB entries.


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Nick Garnett                                      eCos Kernel Architect
eCosCentric Limited    http://www.eCosCentric.com      The eCos experts
Barnwell House, Barnwell Drive, Cambridge, UK.     Tel: +44 1223 245571
Registered in England and Wales:                        Reg No: 4422071


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Re: [ECOS] Is there any issue with eCOS running on 512 or 1GB ofmemory

[Stefan Sommerfeld]

Hi,

> "Domegan, Patrick" <Patrick.Domegan@amd.com> writes:
> 
>> Andrew,
>>
>> Sorry I mean MIPS core, specifically MIPS 4KEc
> 
> In the case of MIPS you will have to deal with the kseg0/1 segment
> size limits. From memory these are limited to 512MB. So if you have
> more RAM, you would have to set up the MMU to map the excess into
> useg. eCos generally doesn't use the MMU in MIPS targets, so there is
> little example code, but you should be able to map everything using
> one or two TLB entries.
> 
> 

I'm running eCos on a 1GHz MIPS and I've done the MMU setup. If you need some 
examples, I could provide them.

Bye...

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