* [U-Boot] Can anyone help me to solve the stack problem of U-boot? Urgent~
@ 2012-04-25 16:35 吳志峰
2012-04-25 22:11 ` Wolfgang Denk
0 siblings, 1 reply; 4+ messages in thread
From: 吳志峰 @ 2012-04-25 16:35 UTC (permalink / raw)
To: u-boot
Dear all:
I had a ARM platform which call DVTEST.
While booting, the platform (ROM code) will copy image from SD card to SDRAM
base address (0x0).
So my TEXT_BASE address should be start from 0x00000000.
But I found all the ARM platforms in U-boot didn?t start from their SDRAM
base address.
They also set up the stack pointer by growing up direction
/* Set up the stack */
stack_setup:
ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot
*/
sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area
*/
sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */
My question is can I start U-boot from SDRAM base address (0x00000000)?
If so, how to change the stack direction? (GCC option or some else)
Please help me because this problem had confused me a lot of days.
Thanks.
Best Regards.
Richard
^ permalink raw reply [flat|nested] 4+ messages in thread
* [U-Boot] Can anyone help me to solve the stack problem of U-boot? Urgent~
2012-04-25 16:35 [U-Boot] Can anyone help me to solve the stack problem of U-boot? Urgent~ 吳志峰
@ 2012-04-25 22:11 ` Wolfgang Denk
2012-04-26 4:24 ` Macpaul Lin
0 siblings, 1 reply; 4+ messages in thread
From: Wolfgang Denk @ 2012-04-25 22:11 UTC (permalink / raw)
To: u-boot
Dear =?big5?B?p2Sn065w?=,
In message <001e01cd2301$609c2e00$21d48a00$@xyz@msa.hinet.net> you wrote:
...
Urgent~
...
> Please help me because this problem had confused me a lot of days.
Please see the README (section "U-Boot Porting Guide", but also
section "System Initialization"), and read doc/README.SPL and
http://catb.org/esr/faqs/smart-questions.html
If this is urgent, and you spent many days on this, then the best
advice for you is to hire an expert.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"Unix is simple, but it takes a genius to understand the simplicity."
- Dennis Ritchie
^ permalink raw reply [flat|nested] 4+ messages in thread
* [U-Boot] Can anyone help me to solve the stack problem of U-boot? Urgent~
2012-04-25 22:11 ` Wolfgang Denk
@ 2012-04-26 4:24 ` Macpaul Lin
2012-04-26 8:32 ` 吳志峰
0 siblings, 1 reply; 4+ messages in thread
From: Macpaul Lin @ 2012-04-26 4:24 UTC (permalink / raw)
To: u-boot
Hi Civic Wu,
> Please see the README (section "U-Boot Porting Guide", but also
> section "System Initialization"), and read doc/README.SPL and
> http://catb.org/esr/faqs/smart-questions.html
>
> If this is urgent, and you spent many days on this, then the best
> advice for you is to hire an expert.
>
> Best regards,
>
> Wolfgang Denk
http://www.youtube.com/watch?v=XaetQBZB_E4
Hope this introduction "U-boot Porting Guide for NDS32 based SoC" may help you.
The stack setup of NDS32 is similar as ARM.
Please also read the document at first. :)
--
Best regards,
Macpaul Lin
^ permalink raw reply [flat|nested] 4+ messages in thread
* [U-Boot] Can anyone help me to solve the stack problem of U-boot? Urgent~
2012-04-26 4:24 ` Macpaul Lin
@ 2012-04-26 8:32 ` 吳志峰
0 siblings, 0 replies; 4+ messages in thread
From: 吳志峰 @ 2012-04-26 8:32 UTC (permalink / raw)
To: u-boot
Dear all:
I'd solved this problem.
I define a global symbol at link script and used this global symbol to set
up stack pointer.
This global symbol indicated the end address of U-boot.
I also changed the globla gd pointer address and memory allocation address.
Thanks....
-----Original Message-----
From: Macpaul Lin [mailto:macpaul at gmail.com]
Sent: Thursday, April 26, 2012 12:24 PM
To: Wolfgang Denk
Cc: ???; u-boot at lists.denx.de
Subject: Re: [U-Boot] Can anyone help me to solve the stack problem of
U-boot? Urgent~
Hi Civic Wu,
> Please see the README (section "U-Boot Porting Guide", but also
> section "System Initialization"), and read doc/README.SPL and
> http://catb.org/esr/faqs/smart-questions.html
>
> If this is urgent, and you spent many days on this, then the best
> advice for you is to hire an expert.
>
> Best regards,
>
> Wolfgang Denk
http://www.youtube.com/watch?v=XaetQBZB_E4
Hope this introduction "U-boot Porting Guide for NDS32 based SoC" may help
you.
The stack setup of NDS32 is similar as ARM.
Please also read the document at first. :)
--
Best regards,
Macpaul Lin
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-04-26 8:32 UTC | newest]
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2012-04-25 16:35 [U-Boot] Can anyone help me to solve the stack problem of U-boot? Urgent~ 吳志峰
2012-04-25 22:11 ` Wolfgang Denk
2012-04-26 4:24 ` Macpaul Lin
2012-04-26 8:32 ` 吳志峰
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