Thanks Brian,
i see now,
movel #CONFIG_VECTORBASE,%a7
movec %a7,%VBR /* set vectors addr */
So %a7, that is %sp, is used just to transfer the #CONFIG_VECTORBASE to
%VBR.
I used 0x00000000 as CONFIG_VECTORBASE address, and kernel start at
0x400, after the vector table.
Anyway, once %a7 is written, the $pc jump somewhere else, ending up into
a _fault routine, still there in the Flash from Colilo.
thanks, angelo
Brian S. Julin wrote:
On Sat, 8 May 2010, angelo wrote:
Hi all,
well i have some news with this coldfire 5307 issue,
i disassembled and put some loop as opcodes here and there in the
kernel (4ef9 0000 XXXX jmp XXXX ) as a very rude debug.
The issue is just at the beginning:
Dump of assembler code for function _text:
0x00000400 <_text+0>: nop
0x00000402 <_text+2>: movew #9984,%sr
0x00000406 <_text+6>: moveal #0,%sp <--- Issue is here
0x0000040c <_text+12>: movec %sp,%vbr
0x00000410 <_text+16>: movel %sp,0xe8944 <_ramvec>
See arch/m68knommu/platform/coldfire/head.S
CONFIG_VECTORBASE is the #0
There are a few config options, you'll see them as macros in
coldfire/head.S
and can trace their names to the Kconfig or vendor/ configs.
Also you can customize own head.S if PLATFORM_SETUP is not enough for
you.
--
Brian
_______________________________________________
uClinux-dev mailing list
uClinux-dev@uclinux.org
http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
This message was resent by uclinux-dev@uclinux.org
To unsubscribe see:
http://mailman.uclinux.org/mailman/options/uclinux-dev
