Re: HIGHMEM now working

Dan Malek writes:

Right, but that is just the most recent implementation for something
we have to admit exists and we integrate into your HIGHMEM and other
changes.  We have to allow, somehow, mapping of board control registers
or other resources that must be used prior to page tables or other
VM initialization.  Right now we map things in BATs or large TLB

OK, that means you need to access these things in the bootloader, or
inside identify_machine() (which calls m8xx_init in your case) or
MMU_init().  Once we get into setup_arch (and then m8xx_setup_arch) we
can just ioremap as normal.

What do you have to initialize that can't wait until m8xx_setup_arch?
Can you give me an example of what sorts of physical addresses you
need to access?

Thanks,
Paul.

--
Paul Mackerras, Senior Open Source Researcher, Linuxcare, Inc.
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paulus@linuxcare.com.au, http://www.linuxcare.com.au/
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