Re: [U-Boot-Users] help starting
Wolfgang Denk wd@denx.de wrote:
Is your BDI is configured to use hardware
breakpoints?
Well, I'd like to cut in here. A little out of topic:-)
Does BDI2000 support Interrupt Service Routine debug? How about exception?
Thanks in advance,
===== Best regards,
Sam
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In message 20041202084804.96333.qmail@web15602.mail.cnb.yahoo.com you wrote:
Does BDI2000 support Interrupt Service Routine debug?
Yes.
How about exception?
Yes with some limitations.
Is it just my paranoid suspicion or did you really forget to read the FAQ before postting? See http://www.denx.de/twiki/bin/view/DULG/FaqBDI2000
Best regards,
Wolfgang Denk
Ehm... okay, I was going to write an sdram- initialization-/refresh-/access- code following the wise and detailed instructions in chapter 15.9 of my fine MPC886 family reference manual.
I also took a look to uboot/board/NAME/NAME.c files to see how others initialize their SDRAM and program it.
Now the problem is that I'm not sure if the bit order of the documentation and the bit-order of the hex-values in the C-Code are corresponding. So I'm neither capable of looking what the others did in their code nor of generating hexadecimal representations of my bitstrings.
It seems like not to know this is incredibly stupid as I couldn't find anything about byte order in the README or the u-boot manual.
Anyway, if anyone could please tell me something about the byte-order of the u-boot code and how it relates to MPC-manual-byte-order, I'd be very happy.
Peter Asemann
In message 41AF11BC.6050403@web.de you wrote:
Now the problem is that I'm not sure if the bit order of the documentation and the bit-order of the hex-values in the C-Code are
The PowerPC documentation lists bit 0 as MSB. For a 32 bit value, bit 31 is the LSB.
It seems like not to know this is incredibly stupid as I couldn't find anything about byte order in the README or the u-boot manual.
Anyway, if anyone could please tell me something about the byte-order of the u-boot code and how it relates to MPC-manual-byte-order, I'd be very happy.
Now _BYTE_order is something completely different. For your question it does not matter at all [FYI: U-Boot is (except for eventually remaining bugs) byteorder-independent].
The bit order doesn't matter, either. Just write down the constants as listed in the manual - MSB as MSB down to LSB as LSB ;-)
Best regards,
Wolfgang Denk
Wolfgang Denk wd@denx.de 的正文：
Does BDI2000 support Interrupt Service Routine
debug?
Yes.
How about exception?
Yes with some limitations.
Is it just my paranoid suspicion or did you really forget to read the FAQ before postting? See http://www.denx.de/twiki/bin/view/DULG/FaqBDI2000
Oops, I forgot the post etiquette. Apologize, no more next time.
Thank you very much,
===== Best regards,
Sam
_________________________________________________________ Do You Yahoo!? 150万曲MP3疯狂搜，带您闯入音乐殿堂 http://music.yisou.com/ 美女明星应有尽有，搜遍美图、艳图和酷图 http://image.yisou.com 1G就是1000兆，雅虎电邮自助扩容！ http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/event/mail_1...
participants (3)
-
Peter Asemann -
Sam Song -
Wolfgang Denk