On Tue, 14 Oct 2008, Wolfgang Denk wrote: > Dear Trent, > > In message <[EMAIL PROTECTED]> you wrote: >> >> At this point all the mpc85xx linker scripts are exactly the same, except for >> one line that defines the flash bank size, so they are combined into one >> script in cpu/mpc85xx/u-boot.lds. A common flash bank size that will work >> for >> all boards is used. If a board in the future needs something different > > Umm... This is not how it should be done. > > U-Boot should *never* assume static flash bank sizes. The whole > design is based on the idea to automatically determine the actual > size of flash and RAM that is fit on a specific board, and to > auto-adjust for this.
The bank size here is only used for linking u-boot. The actual u-boot code is no different that it is now. In order to boot on mpc85xx, the u-boot image must be linked to locate the boot page as the last page in the flash bank. There is no way to do this at run time, it's the boot page. All existing 85xx platforms hard code the location of the boot page in the u-boot image one way or another. I'm just changing the linker script to do it in a way where the same script will work on all 85xx boards. Right now changing the u-boot image size and/or the boot flash bank mapping requires changes to the linker script. Since not all boards have the same image size and/or flash bank mapping, they can't use the same script. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
