Hello 2008/10/7 Wolfgang Denk <[EMAIL PROTECTED]>: > The advantage of the PowerPC implementation with relocation is that > we can measure the actual size of memory present on the board, and > then relocate U-Boot to the very end of the RAM, leaving nearly th When you say "end of the RAM', I think you mean higher addresses, i.e. 0xffff_ffff downwards or lower 0x000_0000 onwards? (this depends on how to look at memory map, written on a sheet of paper -- straight or upside down :-) ).
So the bottom line of PPC architecture is that it tries to have unified booting/relocation process for every platform? For instance, always copy itself in the upper addresses, occupying, say, 128kB or so of RAM. > whole RAM usable as one big contiguous area for "applications" like > loading Linux kernel, ramdisk, etc. [skip] > Just try to imagine you have to install a new version of the BIOS on > your PC just because you add or remove a memory module. Would you buy > such a PC? Well, you convinced me; but despite its flaws and drawbacks the current ARM port architecture exists and it is here to stay for quite awhile, unless there will be some hero ready to break it up and build a new from scratch. -- Roman Mashak _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
