Re: [U-Boot] Instructions in TEXT section can not load data from other section
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@l(r3) li r5, 0x7fff and r4, r4, r5 stw r4, IM_OR0@l(r3)
/* Calculate absolute address in FLASH and jump there */ /*--------------------------------------------------------------*/
lis r3, CONFIG_SYS_MONITOR_BASE@h ori r3, r3, CONFIG_SYS_MONITOR_BASE@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?
--JRJR
Subject: RE: [U-Boot] Instructions in TEXT section can not load data from other section To: jason622@hotmail.com CC: u-boot@lists.denx.de From: joakim.tjernlund@transmode.se Date: Wed, 17 Mar 2010 08:05:23 +0100
jrjr jason622@hotmail.com wrote on 2010/03/17 07:28:04:
Thanks for your advise, I compile with -mrelocatable. If I remove this flag, Error is shown:
ERROR: Your compiler doesn't generate .fixup sections!
My host gcc is gcc 4.1.2 20080704 (Red Hat 4.1.2-44), I try different toolchain: powerpc-unknown-linux-gnu-gcc gcc version 4.4.3 (crosstool-NG-1.6.0) ppc_82xx-gcc gcc version 4.2.2 from ELDK powerpc-603-linux-gnu-gcc gcc version 4.1.0 from crosstool 0.43
The problem is still there : (
--JRJR
Check your linker script(*.lds) for .fixup sections and compare that to a working working board. OR Your TEXT_BASE is wrong
Subject: Re: [U-Boot] Instructions in TEXT section can not load data from
other section
To: jason622@hotmail.com CC: u-boot@lists.denx.de From: joakim.tjernlund@transmode.se Date: Tue, 16 Mar 2010 09:50:42 +0100
Hi, everyone.
I have got a problem when I porting U-BOOT to my board
with MPC8247. My configuration file is based on the MPC8260ADS_config.
The problem is : The instruction in TEXT section can not load data in
other (DATA) sections. It seems there is a relocation to the data section .
For example: If I use
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { if ((*init_fnc_ptr) () != 0) { hang (); } }
I can't jump to functions in init_sequence[] ;
If I called functions such as get_clocks() in board_init_f , it works fine.
So the code in board_init_f can not load address in init_sequence[] , because
init_sequence[] is out of TEXT section.
The same thing happens wit h iop_conf_tab[][], and strings used by "puts".
Anyone there has the same problem? Or know the point? Pls help!
Yes, that is a relocation problem. Do you compile with -mrelocatable? If so, you might have a broken toolchain that don't produce .fixups
jocke
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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@l(r3) li r5, 0x7fff and r4, r4, r5 stw r4, IM_OR0@l(r3) /* Calculate absolute address in FLASH and jump there */ /*--------------------------------------------------------------*/ lis &nbs p; r3, CONFIG_SYS_MONITOR_BASE@h ori r3, r3, CONFIG_SYS_MONITOR_BASE@l addi r3, r3, in_flash - _start + EXC_OFF_SYS_RESET mtlr r3 blrin_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.
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@h ori r3, r3, CONFIG_SYS_MONITOR_BASE@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@hotmail.com CC: u-boot@lists.denx.de From: joakim.tjernlund@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@l(r3) li r5, 0x7fff and r4, r4, r5 stw r4, IM_OR0@l(r3) /* Calculate absolute address in FLASH and jump there */ /*--------------------------------------------------------------*/ lis &nbs p; r3, CONFIG_SYS_MONITOR_BASE@h ori r3, r3, CONFIG_SYS_MONITOR_BASE@l addi r3, r3, in_flash - _start + EXC_OFF_SYS_RESET mtlr r3 blrin_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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jrjr jason622@hotmail.com wrote on 2010/03/17 10:49:15:
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.
Did you read the comment? /* When booting from ROM (Flash or EPROM), clear the */ /* Address Mask in OR0 so ROM appears everywhere */
Try with pristine source first.
On Wed, Mar 17, 2010 at 09:49:15AM +0000, jrjr wrote:
Because I want to use LED controlled by OR3 to debug the code,so I don't want to clear OR0.
It's temporary; you can use bank 3 after BRn/ORn are set to their final values (confusingly named PRELIM) in cpu_init_f().
-Scott
participants (3)
-
Joakim Tjernlund -
jrjr -
Scott Wood