[U-Boot-Users] 答复: [U-Boot-Users] U-boot support arm926ejs

[jack zhao]

Thanks
	But In 5182 system, when I plug out the ddr memory in demo board,
nothing appeared in serial port, while I can see information in powerpc 8347
system. 

-----邮件原件-----
发件人: wd at denx.de [mailto:wd at denx.de] 
发送时间: 2006年7月4日 19:30
收件人: jack zhao
抄送: u-boot-users at lists.sourceforge.net
主题: Re: [U-Boot-Users] U-boot support arm926ejs 

In message <001801c69f5c$04aa8710$ce39a8c0 at usish.com.cn> you wrote:
>
> 	Now I am debugging the board which use Marvell 5182 core, which core
> is arm9, but I can not seem any information from Serial port. I have
traced
> the code with GPIO LED port, from that I can seem there are something
wrong

Use a debugger to find out what exactly is happening.

> in DDR RAM, maybe hardware. Since the arm core use memory to init all the
> decide:

I don't understand what you mean. Missing console output has  nothing
to  do  with  RAM;  you have console output long before even touching
RAM.

> But in powerpc the code use DCache to run the init part, so that even if
the

You misunderstand. Dcache has *nothing* to do with this.

All this code is running from flash, both on ARM and on PowerPC.

> ram does not work normally, we can see information from serial port, could

This has nothing to do with each other.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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