PPC 405 port complains about 'tlbwe' opcode

PPC 405 port complains about 'tlbwe' opcode

[Prakash kanthi]

Hi There,

I am in the process of porting linux-2.4.18 with
ppc-patch-2.4.18 to make a 405 linux os. For 'make
bzImage' it complains about 'tlbwe' being Unrecognied
opcode from head_4xx.S.

-------
powerpc-eabi-gcc -D__ASSEMBLY__ -D__KERNEL__
-I/root/ppctest/linux/include -c -o head_4xx.o
head_4xx.S
head_4xx.S: Assember messages:
head_4xx.S:111: Error: Unrecognized opcode: `tlbwe`
head_4xx.S:112: Error: Unrecognized opcode: `tlbwe`
make[1]: *** [head_4xx.o] Error 1
-------

I saw couple of postings saying that 'tlbwe' is not a
405 opcode. But it is defined by PPC-405 manual. I am
not sure what WS value should be, if i have to add
'tlbwe' to supported opcodes.

Please suggest. If you can share a PPC-405 port for
linux or any other embedded free OS, please let me
know.

thanks in advance,
Prakash


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Re: PPC 405 port complains about 'tlbwe' opcode

[Kumar Gala]

You need to pass down to the assembler an option to enable 403/405
instructions.  Add a -Wa,-m405 to the gcc line.

- kumar

On Thursday, October 24, 2002, at 03:18  PM, Prakash kanthi wrote:

>
> Hi There,
>
> I am in the process of porting linux-2.4.18 with
> ppc-patch-2.4.18 to make a 405 linux os. For 'make
> bzImage' it complains about 'tlbwe' being Unrecognied
> opcode from head_4xx.S.
>
> -------
> powerpc-eabi-gcc -D__ASSEMBLY__ -D__KERNEL__
> -I/root/ppctest/linux/include -c -o head_4xx.o
> head_4xx.S
> head_4xx.S: Assember messages:
> head_4xx.S:111: Error: Unrecognized opcode: `tlbwe`
> head_4xx.S:112: Error: Unrecognized opcode: `tlbwe`
> make[1]: *** [head_4xx.o] Error 1
> -------
>
> I saw couple of postings saying that 'tlbwe' is not a
> 405 opcode. But it is defined by PPC-405 manual. I am
> not sure what WS value should be, if i have to add
> 'tlbwe' to supported opcodes.
>
> Please suggest. If you can share a PPC-405 port for
> linux or any other embedded free OS, please let me
> know.
>
> thanks in advance,
> Prakash
>
>


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Re: PPC 405 port complains about 'tlbwe' opcode

[Wolfgang Denk]

In message <348359E2-E78F-11D6-A3F7-003065BFB10E@motorola.com> you wrote:
>
> You need to pass down to the assembler an option to enable 403/405
> instructions.  Add a -Wa,-m405 to the gcc line.

Actually the cross compiler should automatically  set  the  necessary
options  for  the  target,  or you might run into problems because of
missing or inconsistent options for your compiles (kernel, libraries,
applications) - "-msoft-float"  is  another  candidate  for  such  an
option.

> > Please suggest. If you can share a PPC-405 port for
> > linux or any other embedded free OS, please let me
> > know.

for 4xx systems the linuxppc_2_4_devel tree  is  recommended;  either
fetch  it  from the BK server, or form our CVS server. We also have a
working set of cross and native tools  available  for  free  download
(ELDK - soon available in version 2.0).

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Microsoft Multimedia:
You have nice graphics, sound and animations when the system crashes.

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Re: PPC 405 port complains about 'tlbwe' opcode

[Wolfgang Denk]

In message <20021024155238.7207.h007.c007.wm@mail.directvinternet.com.criticalpath.net> you wrote:
>
> > Actually the cross compiler should automatically  set  the  necessary
> > options  for  the  target,  or you might run into problems because of
> > missing or inconsistent options for your compiles (kernel, libraries,
> > applications) - "-msoft-float"  is  another  candidate  for  such  an
> > option.
>
>
> This is a problem if you created your own cross compiler with GCC 2.95.3. I
> understand this has been fixed in newer versions. Perhaps this is fixed in the
> denk version? I know that the MontaVista distributions fixed this problem.

I know that we fixed it in the ELDK.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
"It is better to have tried and failed than to have  failed  to  try,
but the result's the same."                           - Mike Dennison

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