From mboxrd@z Thu Jan  1 00:00:00 1970
From: jrjr <jason622@hotmail.com>
Date: Wed, 17 Mar 2010 09:49:15 +0000
Subject: [U-Boot] Instructions in TEXT section can not load data from
 other	section
In-Reply-To: <OF65384DC2.1470C66B-ONC12576E9.003035ED-C12576E9.003067C7@transmode.se>
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	<SNT117-W22EDE17AE8F81325E3CECE802C0@phx.gbl>,
	<OFDDD6C953.292271B8-ONC12576E9.0026AC5F-C12576E9.0026F24C@transmode.se>
	<SNT117-W532A2322087B34C9509D20802C0@phx.gbl>,
	<OF65384DC2.1470C66B-ONC12576E9.003035ED-C12576E9.003067C7@transmode.se>
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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_BASE at h
    ori    r3, r3, CONFIG_SYS_MONITOR_BASE at 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: jason622 at hotmail.com
> CC: u-boot at lists.denx.de
> From: joakim.tjernlund at transmode.se
> Date: Wed, 17 Mar 2010 09:48:42 +0100
> 
> jrjr <jason622@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_OR0 at l(r3)
> >     li    r5, 0x7fff
> >     and    r4, r4, r5
> >     stw    r4, IM_OR0 at l(r3)
> >
> >     /* Calculate absolute address in FLASH and jump there        */
> >     /*--------------------------------------------------------------*/
> >
> >     lis &nbs p;  r3, CONFIG_SYS_MONITOR_BASE at h
> >     ori    r3, r3, CONFIG_SYS_MONITOR_BASE at 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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