thorpej 165d4e6d83 Rewrite the ARM mutex implementation to be of the simple-mutex variety. ... Because pre-v6 ARM lacks support for an atomic compare-and-swap, we implement _lock_cas() as a restartable atomic squence that is checked in the IRQ handler right before AST processing. (This is safe because, for all practical purposes, there are no SMP pre-v6 ARM systems.) This can serve as a model for other non-MP platforms that lack the necessary atomic operations for mutexes (SuperH, for example). Upshots of this change: - kmutex_t is now down to 8 bytes on ARM; about as good as we can get. - ARM2 systems don't have to trap and emulate SWP or SWPB for mutexes. The acorn26 port is not updated by this commit to do the LOCK_CAS_CHECK. That is left as an exercise for the port maintainer. Reviewed and tested by Matt Thomas.		2007-03-09 19:21:57 +00:00
..
files.arm	Rewrite the ARM mutex implementation to be of the simple-mutex variety.	2007-03-09 19:21:57 +00:00
files.footbridge
files.sa11x0	move devices entry to MD/conf/files.*	2007-01-08 16:21:45 +00:00
kern.ldscript.head
kern.ldscript.tail
majors.arm32	s/independant/independent/, from Zafer.	2006-11-24 22:04:21 +00:00
Makefile.arm	src/sys/arch/arm32 is long gone, so stop referring to it.	2007-03-04 12:08:58 +00:00