From mboxrd@z Thu Jan 1 00:00:00 1970 From: lamej Date: Mon, 26 Nov 2007 05:37:59 -0800 (PST) Subject: [U-Boot-Users] boot up u-boot from RAM In-Reply-To: References: Message-ID: <13948771.post@talk.nabble.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi lee, I am using lite5200 and Ihave dowaload uboot IT was working perfect, but I got the usb tap and the Code warrior. my problems are : USB tab does not comminicate with the board . and I donot know if uboot goes with code warrior thanks Nghiem, Tien wrote: > > Lei, > > You have to rebuild your code to put your code in the RAM area (other than > the FLASH area). Don't use the address 0x00-0x2fff because its reserved > for the exception vectors usually. I have a Lite5200 EVB. I use the > address 0x20000 to put my u-boot in RAM and it works. I don't know if it > could be done for the mpc8270. > > Tien > > -----Original Message----- > From: u-boot-users-bounces at lists.sourceforge.net > [mailto:u-boot-users-bounces at lists.sourceforge.net]On Behalf Of Lei Sun > Sent: Thursday, October 26, 2006 4:15 PM > To: u-boot-users at lists.sourceforge.net > Subject: [U-Boot-Users] boot up u-boot from RAM > > > Hi all: > I am debugging a costomized board based on mpc8270, due to the > design flaw, we can't boot up the system using flash, so I was trying > to debug u-boot by loading it into the RAM. > I used JTAG debugger to initialize the SDRAM and load the u-boot to > 0x0, after reset, the PC is at 0x100. the disassembled code looks > correct on that location, however, i can't single step start from > 0x100. Is that because 0x100 is the reset vector ? I tried to put some > breakpoint at some places not far from start point, but it gave me > "unknown halt at 0x00000000" error after "run" command. after that the > memory seems corrupted. > Too bad I was using a bad debugger(Guardian-SE), I have a > evaluation copy of the codewarrior plus USB+TAP from freescale. I > tried that on our PQ2FADS-VR SDK. After reset, and CPU halt, I can't > see any disassembed code on 0x100 (the uboot is already in the flash, > and I assume it should read data from CS0 upon reset). Although the > code does execute after hitting "run" button. I wonder why can't I > see the disassembed code after reset? > > Thanks > lei > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job > easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > U-Boot-Users mailing list > U-Boot-Users at lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/u-boot-users > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job > easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > U-Boot-Users mailing list > U-Boot-Users at lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/u-boot-users > > -- View this message in context: http://www.nabble.com/boot-up-u-boot-from-RAM-tf2516529.html#a13948771 Sent from the Uboot - Users mailing list archive at Nabble.com.