I think it's a u-boot 'feature' and has nothing to do with the kernel. xianghua
Scott Coulter wrote: >Xianghua, > >That seems to have worked. > >Do you think that this is worth investigating? > >Thanks, > > >Scott > > > > > > >___________________________________________________________________ > > Scott N. Coulter > Senior Software Engineer > > Cyclone Microsystems > 370 James Street Phone: 203.786.5536 ext. 118 > New Haven, CT 06513-3051 Email: scott.coulter at cyclone.com > U.S.A. Web: http://www.cyclone.com >___________________________________________________________________ > >-----Original Message----- >From: Xianghua Xiao [mailto:x.xiao at freescale.com] >Sent: Friday, June 09, 2006 3:37 PM >To: Scott Coulter >Subject: Re: booting Linux 2.6.15 using a ramdisk and greater than 512MB >of DRAM > >try set initrd_high=0xffffffff under u-boot, see if it helps > >Scott Coulter wrote: > > > >>Hi everyone, >> >>I am not sure if this is a linux question or a u-boot question. I have >>a custom MPC8540 board running U-boot 1.1.4. With a NFS root >>configuration, I have booted and run 2.6.15 with memory from 256MB to >>2GB. If I build a ramdisk image (or even if I use the ramdisk image >>with the 85xx version of ELDK 4.0) and then combine it with the kernel >>image (vmlinux.gz) using "mkimage", the linux boot blows out with an >>oops if I boot the board with more that 512MB of DRAM. From the U-boot >>output, it looks like the ramdisk image is getting copied to the upper >>portion of DRAM. Is it possible that the kernel doesn't map enough >> >> >DRAM > > >>to allow the image to be read? >> >>I haven't spent a lot of time debugging this once I saw that the 512MB >>configuration worked OK. Has anyone run into this? >> >>Thanks, >> >>Scott >> >> >> >>___________________________________________________________________ >> >> Scott N. Coulter >> Senior Software Engineer >> >> Cyclone Microsystems >> 370 James Street Phone: 203.786.5536 ext. 118 >> New Haven, CT 06513-3051 Email: scott.coulter at cyclone.com >> U.S.A. Web: http://www.cyclone.com >>___________________________________________________________________ >> >>_______________________________________________ >>Linuxppc-embedded mailing list >>Linuxppc-embedded at ozlabs.org >>https://ozlabs.org/mailman/listinfo/linuxppc-embedded >> >> >> >>
