2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[mikpe]

vmlinux.coff built from 2.4.20-ben8 fails immediately at boot
on my old-world PowerMac 4400 (OF 2.0.2) with a CLAIM error:

0> boot fd:vmlinux.coff root=/dev/hda8 loading XCOFF
tsize=5E40 dsize=C500C bsize=215DC entry=500000
SECTIONS:
.text	00500000 00500000 00005E40 000000D4
.data	00506000 00506000 000C500C 00005F14
.bss	005CB000 005CB000 000215DC 00000000
loading .text, done..
loading .data, done..
clearing .bssCLAIM failed

Olaf Hering wrote that it was a known bug and suggested the
patch below, but it didn't make any difference.

This is a regression from 2.2.24, which works fine on this
machine (with one patch to disable a prom quiesce call).

Any other patches I should try? I don't want to be stuck at 2.2.24...

/Mikael
(. please cc: me on any replies;
   I've tried twice now to subscribe, without success .)

--- linux-2.4.20-pre11/arch/ppc/boot/ld.script  Sun Oct 27 19:21:01 2002
+++ linux-2.4.20-pre11..7200/arch/ppc/boot/ld.script    Sun Oct 27 18:13:02 2002
@@ -39,7 +39,7 @@ SECTIONS
   PROVIDE (etext = .);

   /* Read-write section, merged into data segment: */
-  . = ALIGN(8);
+  . = ALIGN(0x1000);
   .data    :
   {
     *(.data)

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Olaf Hering]

 On Thu, Mar 13, mikpe@csd.uu.se wrote:

> vmlinux.coff built from 2.4.20-ben8 fails immediately at boot
> on my old-world PowerMac 4400 (OF 2.0.2) with a CLAIM error:
>
> 0> boot fd:vmlinux.coff root=/dev/hda8 loading XCOFF
> tsize=5E40 dsize=C500C bsize=215DC entry=500000
> SECTIONS:
> .text	00500000 00500000 00005E40 000000D4
> .data	00506000 00506000 000C500C 00005F14
> .bss	005CB000 005CB000 000215DC 00000000
> loading .text, done..
> loading .data, done..
> clearing .bssCLAIM failed

Can you provide the 'printenv' output? Does flushing the pram help?
And my patch does fix the 'loading .data' error, your bug is different.

Does the vmlinux.coff from http://penguinppc.org/~olaf/2.4.6/ boot?

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[mikpe]

Olaf Hering writes:
 >  On Thu, Mar 13, mikpe@csd.uu.se wrote:
 >
 > > vmlinux.coff built from 2.4.20-ben8 fails immediately at boot
 > > on my old-world PowerMac 4400 (OF 2.0.2) with a CLAIM error:
 > >
 > > 0> boot fd:vmlinux.coff root=/dev/hda8 loading XCOFF
 > > tsize=5E40 dsize=C500C bsize=215DC entry=500000
 > > SECTIONS:
 > > .text	00500000 00500000 00005E40 000000D4
 > > .data	00506000 00506000 000C500C 00005F14
 > > .bss	005CB000 005CB000 000215DC 00000000
 > > loading .text, done..
 > > loading .data, done..
 > > clearing .bssCLAIM failed
 >
 > Can you provide the 'printenv' output? Does flushing the pram help?
 > And my patch does fix the 'loading .data' error, your bug is different.
 >
 > Does the vmlinux.coff from http://penguinppc.org/~olaf/2.4.6/ boot?

Yes! Your 2.4.6 vmlinux.coff booted from floppy without problems.

My nvsetenv output is below; all values are at their defaults, except
for the obvious tweaks to auto-boot?, input-device, and output-device.

little-endian?  false
real-mode?      false
auto-boot?      false
diag-switch?    false
fcode-debug?    false
oem-banner?     false
oem-logo?       false
use-nvramrc?    true
real-base       0xffffffff
real-size       0x100000
virt-base       0xffffffff
virt-size       0x100000
load-base       0x4000
pci-probe-list  0xffffffff
screen-#columns 0x64
screen-#rows    0x28
selftest-#megs  0x0
boot-device     /AAPL,ROM
boot-file
diag-device     fd:diags
diag-file
input-device    kbd
output-device   /bandit/ATY,264VT
oem-banner
oem-logo
nvramrc         ' byte-load-file d na+  ' or  blpatch  ' byte-load-file? d na+  ' or  blpatch
boot-command    boot

/Mikael

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Olaf Hering]

 On Thu, Mar 13, mikpe@csd.uu.se wrote:

> Olaf Hering writes:
>  >  On Thu, Mar 13, mikpe@csd.uu.se wrote:
>  >
>  > > vmlinux.coff built from 2.4.20-ben8 fails immediately at boot
>  > > on my old-world PowerMac 4400 (OF 2.0.2) with a CLAIM error:
>  > >
>  > > 0> boot fd:vmlinux.coff root=/dev/hda8 loading XCOFF
>  > > tsize=5E40 dsize=C500C bsize=215DC entry=500000
>  > > SECTIONS:
>  > > .text	00500000 00500000 00005E40 000000D4
>  > > .data	00506000 00506000 000C500C 00005F14
>  > > .bss	005CB000 005CB000 000215DC 00000000
>  > > loading .text, done..
>  > > loading .data, done..
>  > > clearing .bssCLAIM failed
>  >
>  > Can you provide the 'printenv' output? Does flushing the pram help?
>  > And my patch does fix the 'loading .data' error, your bug is different.
>  >
>  > Does the vmlinux.coff from http://penguinppc.org/~olaf/2.4.6/ boot?
>
> Yes! Your 2.4.6 vmlinux.coff booted from floppy without problems.

I'm not sure if the 2.4.18 version fits on a floppy, but it should still
boot.

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Benjamin Herrenschmidt]

what are the respective sizes of the working 2.4.6 kernel
and my non working 2.4.20 ? Can you try to shrink the 2.4.20
down to the 2.4.6 size (removing drivers etc...) and see if
that helps ?

Ben.


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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Olaf Hering]

 On Thu, Mar 13, Benjamin Herrenschmidt wrote:

> what are the respective sizes of the working 2.4.6 kernel
> and my non working 2.4.20 ? Can you try to shrink the 2.4.20
> down to the 2.4.6 size (removing drivers etc...) and see if
> that helps ?

There are 2 problems.
My 'loading data' failure must be fixed by page alignment.

diff -purN linux_ppc.orig/arch/ppc/boot/ld.script linux_ppc/arch/ppc/boot/ld.script
--- linux_ppc.orig/arch/ppc/boot/ld.script      2002-11-27 14:42:42.000000000 +0000
+++ linux_ppc/arch/ppc/boot/ld.script   2002-11-27 18:53:34.000000000 +0000
@@ -39,7 +39,8 @@ SECTIONS
   PROVIDE (etext = .);

   /* Read-write section, merged into data segment: */
-  . = ALIGN(8);
+  /* this must be page aligned for OF 1.05 in old Macs, for coff boot */
+  . = ALIGN(0x1000);
   .data    :
   {
     *(.data)

The second problem might be related, I remember Eddie can not boot
anymore with recent kernels and the patch above doesnt fix it. It is
probably still unfixed, and the cause unknown.


Gruss Olaf

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Benjamin Herrenschmidt]

On Thu, 2003-03-13 at 17:07, Olaf Hering wrote:
>  On Thu, Mar 13, Benjamin Herrenschmidt wrote:
>
> > what are the respective sizes of the working 2.4.6 kernel
> > and my non working 2.4.20 ? Can you try to shrink the 2.4.20
> > down to the 2.4.6 size (removing drivers etc...) and see if
> > that helps ?
>
> There are 2 problems.
> My 'loading data' failure must be fixed by page alignment.
>
> diff -purN linux_ppc.orig/arch/ppc/boot/ld.script linux_ppc/arch/ppc/boot/ld.script
> --- linux_ppc.orig/arch/ppc/boot/ld.script      2002-11-27 14:42:42.000000000 +0000
> +++ linux_ppc/arch/ppc/boot/ld.script   2002-11-27 18:53:34.000000000 +0000
> @@ -39,7 +39,8 @@ SECTIONS
>    PROVIDE (etext = .);
>
>    /* Read-write section, merged into data segment: */
> -  . = ALIGN(8);
> +  /* this must be page aligned for OF 1.05 in old Macs, for coff boot */
> +  . = ALIGN(0x1000);
>    .data    :
>    {
>      *(.data)
>
> The second problem might be related, I remember Eddie can not boot
> anymore with recent kernels and the patch above doesnt fix it. It is
> probably still unfixed, and the cause unknown.

Ok. I'll do some experiments with floppies on the 8500 then

Ben.


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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[mikpe]

Benjamin Herrenschmidt writes:
 > what are the respective sizes of the working 2.4.6 kernel
 > and my non working 2.4.20 ? Can you try to shrink the 2.4.20
 > down to the 2.4.6 size (removing drivers etc...) and see if
 > that helps ?

I doubt it's a size problem. My 2.4.20 vmlinux.coff was about 700K,
since I only included the drivers and file systems I actually use.
Olaf's 2.4.6 vmlinux.coff that booted fine is 1.3M.

/Mikael

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Benjamin Herrenschmidt]

On Thu, 2003-03-13 at 18:08, mikpe@csd.uu.se wrote:
> Benjamin Herrenschmidt writes:
>  > what are the respective sizes of the working 2.4.6 kernel
>  > and my non working 2.4.20 ? Can you try to shrink the 2.4.20
>  > down to the 2.4.6 size (removing drivers etc...) and see if
>  > that helps ?
>
> I doubt it's a size problem. My 2.4.20 vmlinux.coff was about 700K,
> since I only included the drivers and file systems I actually use.
> Olaf's 2.4.6 vmlinux.coff that booted fine is 1.3M.

Ok, good to know. Right now I have no exact clue but I suggest
you try changing the .coff wrapper in arch/ppc/boot of 2.4.20
to what it was in 2.4.18 and tell me if that helps.

Ben.


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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[mikpe]

Benjamin Herrenschmidt writes:
 > On Thu, 2003-03-13 at 18:08, mikpe@csd.uu.se wrote:
 > > Benjamin Herrenschmidt writes:
 > >  > what are the respective sizes of the working 2.4.6 kernel
 > >  > and my non working 2.4.20 ? Can you try to shrink the 2.4.20
 > >  > down to the 2.4.6 size (removing drivers etc...) and see if
 > >  > that helps ?
 > >
 > > I doubt it's a size problem. My 2.4.20 vmlinux.coff was about 700K,
 > > since I only included the drivers and file systems I actually use.
 > > Olaf's 2.4.6 vmlinux.coff that booted fine is 1.3M.
 >
 > Ok, good to know. Right now I have no exact clue but I suggest
 > you try changing the .coff wrapper in arch/ppc/boot of 2.4.20
 > to what it was in 2.4.18 and tell me if that helps.

vmlinux.coff built from 2.4.18, both vanilla and with Olaf's patch in
http://penguinppc.org/~olaf/2.4.18/01_linux-2.4.18-rc4-lxppc_devel-0.diff.gz,
boots Ok. However, 2.4.18 has the "excessively slow swim3 floppy writes"
problem I mentioned earlier that 2.2.24 doesn't have.

I also tried 2.4.20-ben8 with coffmain.c from 2.4.18 as you suggested,
but it got the same CLAIM error as before. (hack-coff.c was unchanged
and I didn't find anything else coff-related.)

/Mikael

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Olaf Hering]

 On Fri, Mar 14, mikpe@csd.uu.se wrote:

> I also tried 2.4.20-ben8 with coffmain.c from 2.4.18 as you suggested,
> but it got the same CLAIM error as before. (hack-coff.c was unchanged
> and I didn't find anything else coff-related.)

Your 4400 will work fine with kernel.org kernels.
I remember Eddie said it broke around 2.4.19-pre7 (probably the benh
version).
I do not have much oldworlds left, a 6400 has OF 2.0, I will try it
tomorrow.


Gruss Olaf

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Benjamin Herrenschmidt]

> vmlinux.coff built from 2.4.18, both vanilla and with Olaf's patch in
> http://penguinppc.org/~olaf/2.4.18/01_linux-2.4.18-rc4-lxppc_devel-0.diff.gz,
> boots Ok. However, 2.4.18 has the "excessively slow swim3 floppy writes"
> problem I mentioned earlier that 2.2.24 doesn't have.

What about Olaf's 2.4.6 for swim3 ?

Ben.


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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Benjamin Herrenschmidt]

> vmlinux.coff built from 2.4.18, both vanilla and with Olaf's patch in
> http://penguinppc.org/~olaf/2.4.18/01_linux-2.4.18-rc4-lxppc_devel-0.diff.gz,
> boots Ok. However, 2.4.18 has the "excessively slow swim3 floppy writes"
> problem I mentioned earlier that 2.2.24 doesn't have.
>
> I also tried 2.4.20-ben8 with coffmain.c from 2.4.18 as you suggested,
> but it got the same CLAIM error as before. (hack-coff.c was unchanged
> and I didn't find anything else coff-related.)

Can you try -ben8 and change _both_ ALIGN(8) to ALIGN(4096) ?

Part of the problem is that oldworld OF has known bugs in its
implementation of CLAIM(), I wonder if we should merge text, data
and bss into a single segment in the COFF to make it happy...

Ben.

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[mikpe]

Benjamin Herrenschmidt writes:
 >
 > > vmlinux.coff built from 2.4.18, both vanilla and with Olaf's patch in
 > > http://penguinppc.org/~olaf/2.4.18/01_linux-2.4.18-rc4-lxppc_devel-0.diff.gz,
 > > boots Ok. However, 2.4.18 has the "excessively slow swim3 floppy writes"
 > > problem I mentioned earlier that 2.2.24 doesn't have.
 > >
 > > I also tried 2.4.20-ben8 with coffmain.c from 2.4.18 as you suggested,
 > > but it got the same CLAIM error as before. (hack-coff.c was unchanged
 > > and I didn't find anything else coff-related.)
 >
 > Can you try -ben8 and change _both_ ALIGN(8) to ALIGN(4096) ?

In ld.script you mean? I noticed the second ALIGN(8) for bss and
changed it to 4096 yesterday: it doesn't fix the problem.

/Mikael

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Re: 2.4.20-ben8 vmlinux.coff CLAIM error on PowerMac 4400

[Benjamin Herrenschmidt]

On Fri, 2003-03-14 at 17:01, mikpe@csd.uu.se wrote:
> Benjamin Herrenschmidt writes:
>  >
>  > > vmlinux.coff built from 2.4.18, both vanilla and with Olaf's patch in
>  > > http://penguinppc.org/~olaf/2.4.18/01_linux-2.4.18-rc4-lxppc_devel-0.diff.gz,
>  > > boots Ok. However, 2.4.18 has the "excessively slow swim3 floppy writes"
>  > > problem I mentioned earlier that 2.2.24 doesn't have.
>  > >
>  > > I also tried 2.4.20-ben8 with coffmain.c from 2.4.18 as you suggested,
>  > > but it got the same CLAIM error as before. (hack-coff.c was unchanged
>  > > and I didn't find anything else coff-related.)
>  >
>  > Can you try -ben8 and change _both_ ALIGN(8) to ALIGN(4096) ?
>
> In ld.script you mean? I noticed the second ALIGN(8) for bss and
> changed it to 4096 yesterday: it doesn't fix the problem.

Ok, thanks

Ben.


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