[Fwd: ppc4xx Ports]

Hi there,

Thanks to Matt Porter for suggesting I might care to try here.

Cheers,

Jon.

Jon Masters wrote:

I am working on a 405D port using a base kernel of originally 2.4.20 and
now 2.4.21 from kernel.org rather than Montavista etc.

There are several 4xx ports kicking around and each bodges the tlb stuff
in pgtable.h and elsewhere makes simple fixes to make the stock kernel
actually work...though there are several different offerings by now.
Would someone care to share experiences privately about 4xx ports?

Cheers,

Jon.

P.S. The stock 2.4.21 kernel on has a bunch of very trivial bugs (from
losing a register in the syscall handler to breaking shared ptes) and
will not compile correctly out of the box so to speak. A lot of people
seem to be using the Montavista tree as a result. Now rather than
whining I would also like to help so am asking to make contact with
whoever co-ordinates merging these trees together etc.

We've been using the linuxppc_2_4_devel tree for ppc405.
I would really love to see its fixes merged into the vanilla
tree, but haven't had occasion to do more than whine about it myself.
- Dan


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Dan Kegel wrote:

| We've been using the linuxppc_2_4_devel tree for ppc405.
| I would really love to see its fixes merged into the vanilla
| tree, but haven't had occasion to do more than whine about it myself.
| - Dan

Situation basically is that the port nearly works now (I can ellaborate
obviously but not until the work is finished for commerical reasons)
and it is not using the Montavista tree so I have already made some
progress with the stock kernel and could carry on in my spare time.

Jon.


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On Thu, Nov 13, 2003 at 11:42:49PM +0000, Jon Masters wrote:

I am working on a 405D port using a base kernel of originally 2.4.20 and
now 2.4.21 from kernel.org rather than Montavista etc.

There are several 4xx ports kicking around and each bodges the tlb stuff
in pgtable.h and elsewhere makes simple fixes to make the stock kernel
actually work...though there are several different offerings by now.
Would someone care to share experiences privately about 4xx ports?

Cheers,

Jon.

P.S. The stock 2.4.21 kernel on has a bunch of very trivial bugs (from
losing a register in the syscall handler to breaking shared ptes) and
will not compile correctly out of the box so to speak. A lot of people
seem to be using the Montavista tree as a result. Now rather than
whining I would also like to help so am asking to make contact with
whoever co-ordinates merging these trees together etc.

I use linuxppc-2.4 based tree in our 40x based products. I haven't
checked the most recent version of this tree though (mine is based on
2.4.21 version + some stuff from more recent one (mostly for 440)).

If you have problems with linuxppc-2.4 on 40x hw, report them here :)

Eugene.


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Eugene Surovegin wrote:

| If you have problems with linuxppc-2.4 on 40x hw, report them here :)

Only problem at the moment is that I am reworking some of the pte stuff
to kludge in some of the Montavista code in to 2.4.21 rather than the
homebrew solution I have been using which modifies the bits in hardware
TLB entries from everyone else :-). Some random other bugs too which
amuse me like I can only use half of the TLBs due a known errata with
the Virtex II Pro. The other ports seem to have missed that errata...

Fun.

Cheers,

Jon.


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On Fri, Nov 14, 2003 at 12:36:59AM +0000, Jon Masters wrote:

| If you have problems with linuxppc-2.4 on 40x hw, report them here :)

Only problem at the moment is that I am reworking some of the pte stuff
to kludge in some of the Montavista code in to 2.4.21 rather than the
homebrew solution I have been using which modifies the bits in hardware
TLB entries from everyone else :-).

Could you elaborate on that? What bugs are present in current
linuxppc-2.4? Why are you reworking PTE stuff?

I don't have any PTE/TLB related problems on 405GP/405GPr.

Eugene

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Eugene Surovegin wrote:

| Could you elaborate on that? What bugs are present in current
| linuxppc-2.4? Why are you reworking PTE stuff?

As I said before I am not using linuxppc-2.4 tree so I need to fix up
the stock kernel tree.

Jon.


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