Hello 2008/10/7 Wolfgang Denk <[EMAIL PROTECTED]>: >> I'm trying to understand how it's done on ARM -- > > On ARM it's being done wrong - no real relocation is preformed;
What do you mean by "real relocation"? As per start.S bootcode is copied from ROM to RAM. > instead, U-Boot is liked to a fixed address in RAM. The startup code > (mostly assembler) can run from ROM (too). However, this is possible if only startup code is in NOR flash. > The problem with the ARM implementation is that the link address is > fixed, i. e. it cannot be adjusted to varying RAM sizes. Usually one ports U-Boot on a board with predefined hardware layout, i.e. flash, SDRAM and peripherals are fixed. If hardware changes, say SDRAM size, no big deal to make two/three distinct u-boot images -- after all it ends up by changing TEXT_BASE only, as I understand. -- Roman Mashak _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
