Dear =?GB2312?B?vOHKrw==?=,
In message CAKM5mEg9rbi8yLsQfjawE74gh-eu9p7prSgP=TSX7P9RJiMQAw@mail.gmail.com you wrote:
I have found some tutorials to debug uboot an samsung 2440 and 6410 chip by JTAG .I also known I must write a init program or script first .But I don't known to debug uboot on S5pv210 and write the init DDR script.Anyone gives me a guide to establish the process.
Why would you need to initialize DDR though the JTAG debugger?
The common use of a JTAG debugger to debug U-Boot is _not_ to initialize the system at all though JTAG, as this will be done by U-Boot. Just start the CPU out of reset.
Actually on quite a number of architectures U-Boot expects to find a virgin CPU right out of reset, and any previous meddling with the configuration may have unexpected (and usually adverse) effects. Better don't do it.
Best regards,
Wolfgang Denk