Because I want to use LED controlled by OR3 to debug the code,so I don't want
to clear OR0.
You remind me, so I enable the "Calculate absolute address in FLASH and jump
there " part,
It seems that I get close to the point: jump to "in_flash:" failed.
Here is the start.S part:
/* Calculate absolute address in FLASH and jump there */
/*--------------------------------------------------------------*/
lis r3, config_sys_monitor_b...@h
ori r3, r3, config_sys_monitor_b...@l
addi r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
mtlr r3
blr
in_flash:
...
...
The disassemble part :
fff80158: 3c 60 ff f8 lis r3,-8
fff8015c: 60 63 00 00 ori r3,r3,0 /*r3 is 0xfff80000 */
fff80160: 38 63 01 6c addi r3,r3,364 /* 0xfff8016c */
fff80164: 7c 68 03 a6 mtlr r3
fff80168: 4e 80 00 20 blr
fff8016c <in_flash>:
And my text_base is 0xfff80000.
Something is wrong with the "absolute address" and "relative address", I am
not sure about
that. Expect for your advise.
--JRJR
> Subject: RE: [U-Boot] Instructions in TEXT section can not load data from
> other section
> To: jason...@hotmail.com
> CC: u-boot@lists.denx.de
> From: joakim.tjernl...@transmode.se
> Date: Wed, 17 Mar 2010 09:48:42 +0100
>
> jrjr <jason...@hotmail.com> wrote on 2010/03/17 09:45:08:
> >
> > And I have made some change in cpu/mpc8260/start.S, I removed following
> > lines:
> >
> > #ifndef CONFIG_SYS_RAMBOOT
> > /* When booting from ROM (Flash or EPROM), clear the */
> > /* Address Mask in OR0 so ROM appears everywhere */
> > /*--------------------------------------------------------------*/
> >
> > lis r3, (CONFIG_SYS_IMMR+IM_REGBASE)@h
> > lwz r4, im_...@l(r3)
> > li r5, 0x7fff
> > and r4, r4, r5
> > stw r4, im_...@l(r3)
> >
> > /* Calculate absolute address in FLASH and jump there */
> > /*--------------------------------------------------------------*/
> >
> > lis &nbs p; r3, config_sys_monitor_b...@h
> > ori r3, r3, config_sys_monitor_b...@l
> > addi r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
> > mtlr r3
> > blr
> >
> > in_flash:
> > #endif /* CONFIG_SYS_RAMBOOT */
> >
> > Becasue I don't think I need to clear the Address Mask in OR0, Is there
> > anything wrong?
>
> uhh, Why did you remove that? It is vital code, especially the
> /* Calculate absolute address in FLASH and jump there */ part.
>
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