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CVS: cvs.openbsd.org: src

Module name:	src
Changes by:	oga_(_at_)_cvs_(_dot_)_openbsd_(_dot_)_org	2009/02/04 18:15:20

Modified files:
	sys/arch/amd64/amd64: bus_dma.c pmap.c 
	sys/arch/amd64/include: bus.h pmap.h 

Log message:
Mirroring the i386 commit just made. Add MD PMAP_NOCACHE flag to pmap,
and use it to implement BUS_DMA_NOCACHE for uncached mappings of dma
memory. Needed for some broken hardware.

Discussion with art, miod, kettenis and toby, ok miod.

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