From mboxrd@z Thu Jan 1 00:00:00 1970 To: "SangTae Ha" Cc: linuxppc-embedded@lists.linuxppc.org Subject: Re: RPXclassic PPCBOOT on RAM From: Wolfgang Denk Mime-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 In-reply-to: Your message of "Mon, 25 Jun 2001 14:44:43 +0900." <010601c0fd39$ef0cca90$3877b5d3@dolbae> Date: Mon, 25 Jun 2001 10:48:42 +0200 Message-Id: <20010625084847.744FD10072@denx.denx.de> Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: In message <010601c0fd39$ef0cca90$3877b5d3@dolbae> you wrote: > > I am trying to have the PPCBOOT work on RPXclassic board. I've I don't see any Linux content in this message, so it's off topic in this mailing list. Chances to receive help for PPCBoot porting issues are much better in the PPCBoot User's mailing list. > already port the 8xxROM this board already but I've failed with > PPCBOOT. All configuration parameters are same with 8xxROM and my > BDI2000 didn't get the flash information of RPXClassic (FLASH TYPE, > CHIPSIZE, BUSWIDTH), therefore I really want to test the PPCBOOT on When you don't have such basic hardware information you better forget about low-level work like porting PPCBoot. > RAM space first to debug. In order to make srec file run on RAM This is not a good idea. Executing code from the boot device (flash memory) is the simplest thing you can do. Running from (SD)RAM is MUCH more complicated, since it needs a LOT of initialization which must be correct or you'll just see random problems. It is NOT a good idea to try complicated things as long as you don't have the muchg simpler things running first. > there woule be many efficient debugging techniques. I am currently > using BDI2000, as I mentioned above, but I couldn't get the flash > work. How can I debug the PPCBOOT efficiently in my current stage? Why not? You know the flash type. There are two ways to attach it to the bus (as 8 or as 16 bit devices), and there are 4 possibel bus widths (8, 16, or 32 bit). Even without any further information it is just a couple of minutes to try out these 8 possible combinations. When you cannot get flash working, I guarantee you will fail with SDRAM, too. > Any comments would be appreciated. Try simple things first. And better post such questions to the ppcboot mailing list. Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de panic: kernel trap (ignored) ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/