Where is the source code of Coreboot for PPC?

[Hamo]

Hi lists,
As I want to port Coreboot to ARM, I need to study the structure of
Coreboot. Since Coreboot supported PPC once, I want to study the
structure of the source code. But I can't find it. Can someone help
me? Thanks.

[Joseph Smith]

On 04/02/2011 08:14 AM, Hamo wrote:
> Hi lists,
> As I want to port Coreboot to ARM, I need to study the structure of
> Coreboot. Since Coreboot supported PPC once, I want to study the
> structure of the source code. But I can't find it. Can someone help
> me? Thanks.

Doxygen gives a pretty good visual of the logical flow of coreboot in 
general.

http://qa.coreboot.org/docs/doxygen/

I believe PPC was purged from the tree a little while ago so if you go 
back some revisions you will be able to find it.

Hope that helps.

[Hamo]

On Sun, Apr 3, 2011 at 1:08 AM, Joseph Smith  wrote:
> On 04/02/2011 08:14 AM, Hamo wrote:
> > Hi lists,
> > As I want to port Coreboot to ARM, I need to study the structure of
> > Coreboot. Since Coreboot supported PPC once, I want to study the
> > structure of the source code. But I can't find it. Can someone help
> > me? Thanks.
>
> Doxygen gives a pretty good visual of the logical flow of coreboot in
> general.
>
> http://qa.coreboot.org/docs/doxygen/

That's GREAT. But some information is missing.
> I believe PPC was purged from the tree a little while ago so if you go back
> some revisions you will be able to find it.
>
> Hope that helps.

[Peter Stuge]

Hamo wrote:
> As I want to port Coreboot to ARM, I need to study the structure of
> Coreboot. Since Coreboot supported PPC once, I want to study the
> structure of the source code.

Is a good idea.
> But I can't find it. Can someone help me? Thanks.

It will be in the current coreboot repository. I suggest you go
backwards in steps of 1000 commits, and when it's there I think you
should also try to build the code. Note that it will probably use the
old v2 style of configuring and building. (Use buildtarget in the
mainboards directory, it's a little odd.) The ppc stuff has not been
tested for a long time so it's possible that you would have to go
back another 1000 revs to get a working build, once you find a rev
that has the code.

I think that we by now may be making a few PC-only assumptions in the
coreboot code, but in principle we do not want to, so if there are
any and they are identified then we want to not have them anymore. :)

//Peter

[Corey Osgood]

On Sat, Apr 2, 2011 at 8:13 PM, Peter Stuge  wrote:
> Hamo wrote:
> > As I want to port Coreboot to ARM, I need to study the structure of
> > Coreboot. Since Coreboot supported PPC once, I want to study the
> > structure of the source code.
>
> Is a good idea.
> > But I can't find it. Can someone help me? Thanks.
>
> It will be in the current coreboot repository. I suggest you go
> backwards in steps of 1000 commits, and when it's there I think you
> should also try to build the code. Note that it will probably use the
> old v2 style of configuring and building. (Use buildtarget in the
> mainboards directory, it's a little odd.) The ppc stuff has not been
> tested for a long time so it's possible that you would have to go
> back another 1000 revs to get a working build, once you find a rev
> that has the code.
>
> I think that we by now may be making a few PC-only assumptions in the
> coreboot code, but in principle we do not want to, so if there are
> any and they are identified then we want to not have them anymore. :)

Looks like you want to go prior to r4700 or so

http://www.coreboot.org/pipermail/coreboot/2009-October/052650.html

Note that coreboot has changed a LOT since then.

-Corey

[Hamo]

Thanks Corey. I got the source code I need.

On Sun, Apr 3, 2011 at 9:14 AM, Corey Osgood  wrote:
> On Sat, Apr 2, 2011 at 8:13 PM, Peter Stuge  wrote:
> > Hamo wrote:
> > > As I want to port Coreboot to ARM, I need to study the structure of
> > > Coreboot. Since Coreboot supported PPC once, I want to study the
> > > structure of the source code.
> >
> > Is a good idea.
> > > But I can't find it. Can someone help me? Thanks.
> >
> > It will be in the current coreboot repository. I suggest you go
> > backwards in steps of 1000 commits, and when it's there I think you
> > should also try to build the code. Note that it will probably use the
> > old v2 style of configuring and building. (Use buildtarget in the
> > mainboards directory, it's a little odd.) The ppc stuff has not been
> > tested for a long time so it's possible that you would have to go
> > back another 1000 revs to get a working build, once you find a rev
> > that has the code.
> >
> > I think that we by now may be making a few PC-only assumptions in the
> > coreboot code, but in principle we do not want to, so if there are
> > any and they are identified then we want to not have them anymore. :)
>
> Looks like you want to go prior to r4700 or so
>
> http://www.coreboot.org/pipermail/coreboot/2009-October/052650.html
>
> Note that coreboot has changed a LOT since then.
>
> -Corey

[Hamo]

On Sun, Apr 3, 2011 at 8:13 AM, Peter Stuge  wrote:
> Hamo wrote:
> > As I want to port Coreboot to ARM, I need to study the structure of
> > Coreboot. Since Coreboot supported PPC once, I want to study the
> > structure of the source code.
>
> Is a good idea.
> > But I can't find it. Can someone help me? Thanks.
>
> It will be in the current coreboot repository. I suggest you go
> backwards in steps of 1000 commits, and when it's there I think you
> should also try to build the code. Note that it will probably use the
> old v2 style of configuring and building. (Use buildtarget in the
> mainboards directory, it's a little odd.) The ppc stuff has not been
> tested for a long time so it's possible that you would have to go
> back another 1000 revs to get a working build, once you find a rev
> that has the code.
>
> I think that we by now may be making a few PC-only assumptions in the
> coreboot code, but in principle we do not want to, so if there are
> any and they are identified then we want to not have them anymore. :)

Shall I first make the PPC support available in the current source
tree to make sure that all of the IA32-only code has disappeared or
just begin my porting to ARM. If the former,  I have no experiences
developing PPC software and I don't have a PPC device. Can someone
give me a hand on this?
> //Peter

[Peter Stuge]

Hamo wrote:
> > I think that we by now may be making a few PC-only assumptions in the
> > coreboot code, but in principle we do not want to, so if there are
> > any and they are identified then we want to not have them anymore. :)
>
> Shall I first make the PPC support available in the current source
> tree to make sure that all of the IA32-only code has disappeared or
> just begin my porting to ARM.

I say go straight for ARM.

//Peter

[bari]

Hamo wrote:
> Shall I first make the PPC support available in the current source
> tree to make sure that all of the IA32-only code has disappeared or
> just begin my porting to ARM.

No. Just work on ARM. There is not much interest in reviving PPC support 
for coreboot. PPC interest and applications are shrinking while ARM is 
exploding.

-Bari