Unrecognized opcode: `mtdcr'

Unrecognized opcode: `mtdcr'

[Stephen Cameron]

Hi,

I just started trying to play with my new Ebony board...

I noticed now 'as' complains: Unrecognized opcode: `mtdcr'
when I do this:
	make ebony_config
	make mrproper
	make menuconfig
	make dep
	make zImage

But, if I do this:
	make walnut_config
	make mrproper
	make menuconfig
	make dpe
	make zImage

I can make a zImage just fine.

Of course I can manually add '-Wa,-m405' into my CFLAGS in
the Makefile, and it will build ok, but I'm thinking that's
not what I want to do.

My 'as' says:

[scameron@zuul sslinux]$ /usr/local/powerpc-linux/bin/as --version
GNU assembler 2.12
Copyright 2002 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
This assembler was configured for a target of `powerpc-linux'.

I also tried binutils 2.12.1, with the same results.

Any ideas?

Thanks,

-- steve


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Re: Unrecognized opcode: `mtdcr'

[Tom Rini]

On Wed, May 29, 2002 at 01:48:22PM -0500, Stephen Cameron wrote:
>
> Hi,
>
> I just started trying to play with my new Ebony board...
>
> I noticed now 'as' complains: Unrecognized opcode: `mtdcr'
> when I do this:
> 	make ebony_config
[snip]
> But, if I do this:
> 	make walnut_config
[snip]
> Any ideas?

I think we need to change arch/ppc/Makefile from:
ifdef CONFIG_40x
CFLAGS := $(CFLAGS) -Wa,-m405
endif

To:
ifdef CONFIG_4xx
CFLAGS := $(CFLAGS) -Wa,-m405
endif

For the moment.  Until there's some 440-specific opcodes we use (are
there any?) which means we'll need to do -Wa,-m440.

Matt, do you want to do this or shall I?

--
Tom Rini (TR1265)
http://gate.crashing.org/~trini/

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RE: Unrecognized opcode: `mtdcr'

[Cameron, Steve]

[..snip...]
>
> I think we need to change arch/ppc/Makefile from:
> ifdef CONFIG_40x
> CFLAGS := $(CFLAGS) -Wa,-m405
> endif
>
> To:
> ifdef CONFIG_4xx
> CFLAGS := $(CFLAGS) -Wa,-m405
> endif

Ok, this worked for me.  Thanks!  (I guess I wasn't so
far off track after all.)

> For the moment.  Until there's some 440-specific opcodes we use (are
> there any?) which means we'll need to do -Wa,-m440.

When I had tried "-Wa,-m440" before, it wasn't recognized as an option.
(but perhaps by "do -Wa,-m440", you mean enhance the C compiler and/or
assembler.)

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Re: Unrecognized opcode: `mtdcr'

[Tom Rini]

On Wed, May 29, 2002 at 02:30:16PM -0500, Cameron, Steve wrote:
> [..snip...]
> >
> > I think we need to change arch/ppc/Makefile from:
> > ifdef CONFIG_40x
> > CFLAGS := $(CFLAGS) -Wa,-m405
> > endif
> >
> > To:
> > ifdef CONFIG_4xx
> > CFLAGS := $(CFLAGS) -Wa,-m405
> > endif
>
> Ok, this worked for me.  Thanks!  (I guess I wasn't so
> far off track after all.)
>
> > For the moment.  Until there's some 440-specific opcodes we use (are
> > there any?) which means we'll need to do -Wa,-m440.
>
> When I had tried "-Wa,-m440" before, it wasn't recognized as an option.
> (but perhaps by "do -Wa,-m440", you mean enhance the C compiler and/or
> assembler.)

Well, iff there's 440-specific opcodes, at somepoint gas will know about
them, and we can use -Wa,-m440, or so.  But for now -Wa,-m405 seems
correct for 4xx.

--
Tom Rini (TR1265)
http://gate.crashing.org/~trini/

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Re: Unrecognized opcode: `mtdcr'

[Matt Porter]

On Wed, May 29, 2002 at 12:54:29PM -0700, Tom Rini wrote:
>
> On Wed, May 29, 2002 at 02:30:16PM -0500, Cameron, Steve wrote:
> > [..snip...]
> > >
> > > I think we need to change arch/ppc/Makefile from:
> > > ifdef CONFIG_40x
> > > CFLAGS := $(CFLAGS) -Wa,-m405
> > > endif
> > >
> > > To:
> > > ifdef CONFIG_4xx
> > > CFLAGS := $(CFLAGS) -Wa,-m405
> > > endif
> >
> > Ok, this worked for me.  Thanks!  (I guess I wasn't so
> > far off track after all.)

Pushed this.

> > > For the moment.  Until there's some 440-specific opcodes we use (are
> > > there any?) which means we'll need to do -Wa,-m440.
> >
> > When I had tried "-Wa,-m440" before, it wasn't recognized as an option.
> > (but perhaps by "do -Wa,-m440", you mean enhance the C compiler and/or
> > assembler.)
>
> Well, iff there's 440-specific opcodes, at somepoint gas will know about
> them, and we can use -Wa,-m440, or so.  But for now -Wa,-m405 seems
> correct for 4xx.

There is _a_ 440-specific opcode, dlbmnz.  It's not yet supported by
gas (and ideally glibc).  For now, a 405 enabled toolchain is
sufficient.

When I push some CONFIG_BOOKE cleanup we'll have an option to enable
-mbooke with as well.  That's where most of the new instructions
come from, but they aren't 440 specific (they'll be on the e500
Book E core as well).  Right now, the important booke opcodes
are picked up by the PPC403 conf in gas so there's not a huge
hurry.

Regards,
--
Matt Porter
porter@cox.net
This is Linux Country. On a quiet night, you can hear Windows reboot.

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Re: Unrecognized opcode: `mtdcr'

[Matt Porter]

On Wed, May 29, 2002 at 01:43:50PM -0700, Matt Porter wrote:
> There is _a_ 440-specific opcode, dlbmnz.  It's not yet supported by
> gas (and ideally glibc).  For now, a 405 enabled toolchain is
> sufficient.

Heh, can't type...the opcode is dlmzb.

-Matt

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Memory usage

[Owen Green]

Hi all,

I`m currently developing applications for a linuxppc
embedded system (mpc8xx) with linux-2.4.4 from denx
and I realised that even with a tiny application I
spent something like 140k on my RAM area, where at
least 100k of that is for ld-2.2.3.so, I guess.
The question is, am I right? Is there a way to share
the code section of ld-2.2.3.so along applications? Is
there a way to get this memory size down?

Thanks in advance,

Owen.


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