Thierry Reding wrote at Monday, October 17, 2011 4:27 AM: > * Thierry Reding wrote: > > * Stephen Warren wrote: > > > ... [U-Boot patch/build instructions] > > > Then, run nvflash just like you would normally. > > > > Okay, I've been able to build U-Boot and setup some scripts that should > > automate the nvflash procedure according to your instructions. I'll have to > > wait until I get back to work on Monday to see whether it actually works, > > though. > > I'm unable to make this work. I've done as you said, branched from the commit > you mentioned and applied the patches you listed. Then ran: > > $ make CROSS_COMPILE=... O=build/harmony harmony_config > $ make CROSS_COMPILE=... O=build/harmony -j8 > > And flashed the resulting u-boot.bin like you described, by replacing the > fastboot.bin in the configuration with u-boot.bin. When rebooting the device > (I used a Harmony for this testing obviously) there's nothing. No output on > the serial line. Flashing fastboot.bin I can at least see some debugging > output. > > I also tried to update the TEXT_BASE, which seems to be 0x00108000 for > fastboot, and 0x00E08000 for U-Boot, but that didn't make a difference. Any > ideas on what could be the problem? Ah yes, sorry, I'd forgotten about that. The default load address for fastboot and U-Boot is different. I don't know why, but apparently U-Boot doesn't work when built with a load address that matches fastboot. I believe we have a bug filed to investigate why, but I don't know any more details. > I'm not quite sure where these values come from. Are they hard-coded in the > boot ROM? And how does it know from which NAND partition to load the > bootloader? These addresses exist in a couple places: * In the BCT, which tells the boot ROM the SDRAM address where the boot- loader should be copied to, and what the entry point is. * Hard-coded into nvflash, and the fastboot.bin used during the flashing process. Hence, internally, I believe we use nvflash/fastboot.bin that have been specifically recompiled to support U-Boot's load address. Thinking about this some more, I think we have shipped those rebuilt versions outside NVIDIA in a publically accessible place. I'll follow up internally and see if we have, or what we can do about it. Sorry for sending you on a wild goose chase. -- nvpublic -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
