MPC7410 doesn't work with linux-2.4.20-denx

MPC7410 doesn't work with linux-2.4.20-denx

[Christian Meyer]

Hello!

I'm currently trying to get linux running on an embedded board:
	* MPC7410 Rev.1.4
	* PowerQUICC (MPC 8260)
	* RAM: 128 MB
	* Flash: 64 MB
	* Kernel: 2.4.20-denx

For some reason, it doesn't boot properly. It says "Now booting Linux",
after that something triggers a hard reset. For the last 2 weeks I tried
to debug (using the hardware debugger BDI2000) the kernel and more or
less found out where the problem might be located.

start_here() (arch/ppc/kernel/head.S) calls call_setup_cpu()
(arch/ppc/kernel/misc.S), machine_init() (arch/ppc/kernel/setup.c),
MMU_init() (arch/ppc/mm/init.c) and load_up_mmu()
(arch/ppc/kernel/head.S). call_setup_cpu() and machine_init() seem to
be fine; MMU_init() calls MMU_init_hw() and mapin_ram(). As far as I
can tell, that's the point where the board initiates a hard reset. I
don't know why it does that and I also don't know any solution to solve
that problem. It seems like either the MMU isn't correctly initialized
or there's a problem with the L2 cache. Motorola says, that the MPC7410
is compatible to the MPC75x; regarding my current problem it looks like
that there's a difference somewhere.

Maybe you know a solution for the problem or have an idea how to find
out what's wrong.

Thanks in advance,
--
Christian Meyer

Technische Universität München
E-Mail: Christian.Meyer@cs.tum.edu
UIN: 72107443
AIM: chrisime
Jabber: chrisime@charente.de

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Re: MPC7410 doesn't work with linux-2.4.20-denx

[Wolfgang Denk]

Dear Christian,

in message <200308141128.h7EBSnQ06089@mailgate5.cinetic.de> you wrote:
>
> I'm currently trying to get linux running on an embedded board:
> 	* MPC7410 Rev.1.4
> 	* PowerQUICC (MPC 8260)
> 	* RAM: 128 MB
> 	* Flash: 64 MB
> 	* Kernel: 2.4.20-denx
>
> For some reason, it doesn't boot properly. It says "Now booting Linux",
> after that something triggers a hard reset. For the last 2 weeks I tried

A couple of questions:

* Which bootloader are you using?
* Are you sure that the SDRAM initialization is correct?
* Are you sure the information passed from the bootloader to the Linux
  kernel (memory size, clocks, ...) is correct?
* Finally: did you disable the software watchdog?


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
If you fail to plan, plan to fail.

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RE: MPC7410 doesn't work with linux-2.4.20-denx

[Ron Bianco]

I'm curious as to what an MPC8260 is doing on a board based on an MPC7410?
Is this a dual processor board?

Ron

>
> Dear Christian,
>
> in message <200308141128.h7EBSnQ06089@mailgate5.cinetic.de> you wrote:
> >
> > I'm currently trying to get linux running on an embedded board:
> > 	* MPC7410 Rev.1.4
> > 	* PowerQUICC (MPC 8260)
> > 	* RAM: 128 MB
> > 	* Flash: 64 MB
> > 	* Kernel: 2.4.20-denx
> >
> > For some reason, it doesn't boot properly. It says "Now booting Linux",
> > after that something triggers a hard reset. For the last 2 weeks I tried
>
> A couple of questions:
>
> * Which bootloader are you using?
> * Are you sure that the SDRAM initialization is correct?
> * Are you sure the information passed from the bootloader to the Linux
>   kernel (memory size, clocks, ...) is correct?
> * Finally: did you disable the software watchdog?
>
>
> 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
> If you fail to plan, plan to fail.
>
>

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Re: MPC7410 doesn't work with linux-2.4.20-denx

[Wolfgang Denk]

In message <000301c36357$240d93c0$4d00a8c0@warp-speed> you wrote:
>
> I'm curious as to what an MPC8260 is doing on a board based on an MPC7410?
> Is this a dual processor board?

I guess the CPU core of the 8260 is disabled, and they use it as  I/O
processor only. It provides a lot of nice communication features ...

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
Pain is a thing of the mind.  The mind can be controlled.
	-- Spock, "Operation -- Annihilate!" stardate 3287.2

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problems on building linux kernel

[John Zhou]

Dear All,

I met a problem as following when I'm building linux kernel image. Does anyboday give me some advics or comments?

Thanks in advance!
=========================================================================

root@localhost linux-2.4.1]# make vmmage
ppc-linux-gcc -D__KERNEL__ -I/opt/Embedix/home/abc/project/ppcTest/build/rpmdir/BUILD/linux-2.4.1/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -fno-strict-aliasing -D__powerpc__ -fsigned-char -msoft-float -pipe -ffixed-r2 -Wno-uninitialized -mmultiple -mstring -Wa,-mppc64bridge -I/opt/Embedix/home/abc/project/ppcTest/build/rpmdir/BUILD/linux-2.4.1/include -I/opt/Embedix/home/abc/project/ppcTest/build/rpmdir/BUILD/linux-2.4.1/include/asm-ppc/ -I/opt/Embedix/home/abc/project/ppcTest/build/rpmdir/BUILD/linux-2.4.1/include/linux   -c -o init/main.o init/main.c
Assembler messages:
Error: Internal assembler error for instruction bdnzlr-
Error: Internal assembler error for instruction bdnzlr+
Error: Internal assembler error for instruction bdnzlrl-
Error: Internal assembler error for instruction bdnzlrl+
Error: Internal assembler error for instruction bdzlr-
Error: Internal assembler error for instruction bnulrl+
Error: Internal assembler error for instruction btlr-
Error: Internal assembler error for instruction btlr+
Error: Internal assembler error for instruction btlrl-
Error: Internal assembler error for instruction btlrl+
Error: Internal assembler error for instruction bflr-
Error: Internal assembler error for instruction bflr+
Error: Internal assembler error for instruction bflrl-
Error: Internal assembler error for instruction bflrl+
Error: Internal assembler error for instruction bltctr-
Error: Internal assembler error for instruction bltctr+
Error: Internal assembler error for instruction bltctrl-
Error: Internal assembler error for instruction bltctrl+
Error: Internal assembler error for instruction bngctrl+
Error: Internal assembler error for instruction bnectr-
Error: Internal assembler error for instruction bfctrl-
Error: Internal assembler error for instruction bfctrl+
Internal error, aborting at ../../gas/config/tc-ppc.c line 1309 in md_begin
Please report this bug.
init/main.c:283: Internal compiler error:
init/main.c:283: output pipe has been closed
cpp0: output pipe has been closed
make: *** [init/main.o] Error 1
[root@localhost linux-2.4.1]#

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Re: problems on building linux kernel

[Dan Kegel]

John Zhou wrote:
> ppc-linux-gcc -D__KERNEL__ -I/opt/Embedix/home/abc/project/ppcTest/build/rpmdir/BUILD/linux-2.4.1/include ...
> Error: Internal assembler error for instruction bdnzlr- ...
> Error: Internal assembler error for instruction bfctrl+
> Internal error, aborting at ../../gas/config/tc-ppc.c line 1309 in md_begin

Looks like the error reported in
http://sources.redhat.com/ml/binutils/2002-02/msg00500.html
which was presumably fixed in binutils-2.12.
Where'd you get your compiler?
If you have a supported copy of Embedix, contact the vendor...
Otherwise, you might try upgrading to newer binutils on your own.
- Dan

--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045


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