kernel newbie

kernel newbie

[Ramya Ravichandran]

Hi,

   I am a newbie to Linux.I have to develop an
embedded linux controller that boots from the Compact
flash card instead of the HD and work from RAM. I have
to have a bare minimum implementation of Linux kernel
to do this.
  I don't know where to start. Shud I start by writing
the driver for the CF card? What background knowledge
shud I have for implementing the kernel?

Please Help.Thanks

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Re: kernel newbie -- Compact Flash booting

[Matti Aarnio]

On Thu, Jan 24, 2002 at 10:52:37PM -0800, Ramya Ravichandran wrote:
> Hi,
> 
>    I am a newbie to Linux.I have to develop an
> embedded linux controller that boots from the Compact
> flash card instead of the HD and work from RAM. I have
> to have a bare minimum implementation of Linux kernel
> to do this.
>   I don't know where to start. Shud I start by writing
> the driver for the CF card? What background knowledge
> shud I have for implementing the kernel?

  The compact flashes appear to PCMCIA as removable IDE drives.
  Unless the PCMCIA-CF adapter is more than just two connectors
  plus a set of wires in between, you should have no problems
  at all.   Either IDE, or IDE_CS driver should do it.
  (The IDE_CS will, of course, need the PCMCIA suite too to
   support removable media.  IDE doesn't support removability.)

  To boot from CF you need support in your boot-rom/flash
  code.  Something which might not be true, unless you write
  it yourself..

> Please Help.Thanks

/Matti Aarnio

Re: kernel newbie -- Compact Flash booting

[GNUOrder]

What if the CF connects to the IDE bus with an adapter?  Whould the IDE-CS 
still work or do you mean the IDE chipset itself doesn't support hot swapping 
or removable drives?  Also what kind of support is there for USB CF 
read/writers?

GO

On Friday 25 January 2002 02:37, Matti Aarnio wrote:
> On Thu, Jan 24, 2002 at 10:52:37PM -0800, Ramya Ravichandran wrote:
> > Hi,
> >
> >    I am a newbie to Linux.I have to develop an
> > embedded linux controller that boots from the Compact
> > flash card instead of the HD and work from RAM. I have
> > to have a bare minimum implementation of Linux kernel
> > to do this.
> >   I don't know where to start. Shud I start by writing
> > the driver for the CF card? What background knowledge
> > shud I have for implementing the kernel?
>
>   The compact flashes appear to PCMCIA as removable IDE drives.
>   Unless the PCMCIA-CF adapter is more than just two connectors
>   plus a set of wires in between, you should have no problems
>   at all.   Either IDE, or IDE_CS driver should do it.
>   (The IDE_CS will, of course, need the PCMCIA suite too to
>    support removable media.  IDE doesn't support removability.)
>
>   To boot from CF you need support in your boot-rom/flash
>   code.  Something which might not be true, unless you write
>   it yourself..
>
> > Please Help.Thanks
>
> /Matti Aarnio
> -
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Re: kernel newbie

[Pedro M. Rodrigues]

   Look at the Embedded Coyote Linux project at 
http://www.coyotelinux.com/embedded/docs/cflash.php . It may give you 
some hints on the subject.


/Pedro

On 24 Jan 2002 at 22:52, Ramya Ravichandran wrote:

> Hi,
> 
>    I am a newbie to Linux.I have to develop an
> embedded linux controller that boots from the Compact
> flash card instead of the HD and work from RAM. I have
> to have a bare minimum implementation of Linux kernel
> to do this.
>   I don't know where to start. Shud I start by writing
> the driver for the CF card? What background knowledge
> shud I have for implementing the kernel?
> 
> Please Help.Thanks
>