I plan to port linux-mips to a a 32bit 4KEc based (little endian)
I have three questions:
Q1- The nice book `see mips run' states that it's better that the
physical address map fits entirely in kseg1 (in 0x0-0x2000_0000).
I would not be the first to plan for a lot of RAM and I understand
HIGHMEM patch is ok if an extra RAM area is out of reach of kseg1.
But what if my PCI devices I/O do not lie in kseg1? I may program the
TLB to see them thru kseg2 (but kseg2 seems to be the place where page
tables are stored...)
Q2- Most hardware platforms have their SDRAM chips mapped at
physical address 0x0. Mine does not. Am I going ahead of problems?
It seems to be assumed at a lot of places (I have already ported YAMON).
Q3- I'd rather stick to a 2.4.x linux port. But... should I use:
a- the latest official 2.4.x kernel
b- the latest 2.4.x-preY kernel
c- the latest linux-mips.org 2.4.x kernel
d- cvs -z3 -d :pserver:email@example.com:/home/cvs co -r linux_2_4
Thanks for any useful advise.