Jake Burkholder 4c4a1a19e8 Implement a nested window state. This avoids attempting to spill a user ... window to the user stack while in a nested kernel trap. We do this for entry to the kernel from user mode, but if we get an interrupt in kernel mode while there are still user windows in the cpu, and we attempt to spill to the user stack, we may take too many nested traps and overflow the trap stack, causing a red state exception. This is needed by upcoming changes to allow the user tsb to not be locked in the tlb. Reviewed by: tmm		2002-02-25 18:37:17 +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	Sync with the Alpha's GENERIC configuration.	2002-02-24 18:49:38 +00:00
ebus	Minor bug fixes (add a missing break, correct the resource ranges, remove	2002-02-13 15:35:22 +00:00
include	Implement a nested window state. This avoids attempting to spill a user	2002-02-25 18:37:17 +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	Implement a nested window state. This avoids attempting to spill a user	2002-02-25 18:37:17 +00:00