Wolfgang Denk wrote:
Are you sure about this? Normally ARM systems have flash memory (or some other ROM) mapped at 0, because this is where execution starts out of reset.
Yes I am. On this system (at least as it is now) U-boot is executed from memory when DDR has already been initialized. So yes, I confirm DDR is mapped from 0x00000000 to 0x3fffffff but I only have 64MB so the end of physical RAM is 0x03ffffff.
First problem: I can compile U-boot with ELDK 4.1 but if I enter the "examples" directory and issue a make:
Who says you should do that? The examples are automatically built when running "make all" (or just "make") in the top level directory.
Sorry my fault.
I do not have RAM at that location! Shall I modify the Makefile for this?
Yes, you have to adjust the link address to your actual memory map.
Well now it is somewhat clearer and I think I understand. I will do some experiments on the target on Tuesday, after labor's day of course :)
It's not only gly, but also error-prone. You should not use plain pointer accesses to read or write to registers, but the correct accessor functions/macros ({in,out}[bwl]).
Uh... are those defined for U-boot as well? Thanks.
bye! as