In message 6.0.1.1.0.20041207154508.01efa490@192.168.2.1 you wrote:
I'm working with a custom hardware based on Cirrus Logic EP9315 processor. As the on-chip SDRAM controller is unable to map the memory in contiguous regions, I have to use the MMU to do that.
... if you need it. Maybe one bank of memory is sufficient for the operation of U-Boot?
- In my understanding the function cleanup_before_linux
(cpu/arm920t/cpu.c) is supposed to perform this opearation but it does not. Is this the right place to turn MMU off?
Yes.
- The second questions refers to memory tags. They should describe _physical_
mapping, right? If this is correct, the bd->bi_dram fields should be extended
Right.
in order to describe both physical and virtual regions. Does it make sense?
Why would you need virtual addresses? U-Boot does not need these for operation, and Linux will not use these anyway.
Best regards,
Wolfgang Denk