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@denx.de [mailto:wd@denx.de] 发送时间: 2006年7月4日 19:30 收件人: jack zhao 抄送: u-boot-users@lists.sourceforge.net 主题: Re: [U-Boot-Users] U-boot support arm926ejs
In message 001801c69f5c$04aa8710$ce39a8c0@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