What does KERNELBASE mean?

[Alan Mimms]

KERNELBASE is the virtual address the physical RAM is mapped to.

On most kernels on PowerPC this is 0xC0000000.  If you subtract KERNELBASE from
a virtual address, you get its physical address in RAM, since PowerPC platforms
more or less universally define that RAM starts at 0x00000000.  Hence the name
TOPHYS.

a

On Tue, 04 Jan
2000, LiuTao wrote: > Hi:
> 
> In linux/arch/ppc/kernel/head.S, what does KERNELBASE mean?
> What does the following mean?
> ".long	TOPHYS(__start),0,0"
> 
> Thanks.
> 
> LiuTao
-- 
Alan Mimms     Packet Engines, Inc.     Spokane, Washington [99214-0497]
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