Jake Burkholder 5573db3f0b Allocate tlb contexts on the fly in cpu_switch, instead of statically 1 to 1 ... with pmaps. When the context numbers wrap around we flush all user mappings from the tlb. This makes use of the array indexed by cpuid to allow a pmap to have a different context number on a different cpu. If the context numbers are then divided evenly among cpus such that none are shared, we can avoid sending tlb shootdown ipis in an smp system for non-shared pmaps. This also removes a limit of 8192 processes (pmaps) that could be active at any given time due to running out of tlb contexts. Inspired by: the brown book Crucial bugfix from: tmm		2002-03-04 05:20:29 +00:00
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compile	Obrien created this directory, but I didn't cvs add cvsignore	2001-07-01 23:37:03 +00:00
conf	I was able to boot this kernel using the latest WIP kernel sources.	2002-02-25 22:13:44 +00:00
ebus	Minor bug fixes (add a missing break, correct the resource ranges, remove	2002-02-13 15:35:22 +00:00
include	Allocate tlb contexts on the fly in cpu_switch, instead of statically 1 to 1	2002-03-04 05:20:29 +00:00
isa	Fix typos in a comment.	2002-02-13 15:43:42 +00:00
pci	Merge r1.39 from NetBSD (manage both streaming caches for psycho pairs).	2002-02-13 16:07:59 +00:00
sbus	Add support for the SBus, which is used in early Sun UltraSPARC machines.	2002-02-13 16:11:36 +00:00
sparc64	Allocate tlb contexts on the fly in cpu_switch, instead of statically 1 to 1	2002-03-04 05:20:29 +00:00