John Baldwin 2db99100a4 Improve the handling of static DMA buffers that use non-default memory ... attributes (currently just BUS_DMA_NOCACHE): - Don't call pmap_change_attr() on the returned address, instead use kmem_alloc_contig() to ask the VM system for memory with the requested attribute. - As a result, always use kmem_alloc_contig() for non-default memory attributes, even for sub-page allocations. This requires adjusting bus_dmamem_free()'s logic for determining which free routine to use. - For x86, add a new dummy bus_dmamap that is used for static DMA buffers allocated via kmem_alloc_contig(). bus_dmamem_free() can then use the map pointer to determine which free routine to use. - For powerpc, add a new flag to the allocated map (bus_dmamem_alloc() always creates a real map on powerpc) to indicate which free routine should be used. Note that the BUS_DMA_NOCACHE handling in powerpc is currently #ifdef'd out. I have left it disabled but updated it to match x86. Reviewed by: scottl MFC after: 1 month		2012-08-03 13:50:29 +00:00
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acpica	- Remove unused code for CR3 and CR4.	2012-06-13 22:53:56 +00:00
bios	Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.	2011-11-07 15:43:11 +00:00
cpufreq	Fix apparent logic reversal in setting the 'auto_mode' flag.	2012-02-26 21:24:27 +00:00
include	Add support for the XSAVEOPT instruction use. Our XSAVE/XRSTOR usage	2012-07-14 15:48:30 +00:00
isa	Restore proper use of bounce buffers for ISA DMA. When locking was	2012-03-29 18:58:02 +00:00
pci	Trim stray blank line.	2012-04-11 21:00:33 +00:00
x86	Improve the handling of static DMA buffers that use non-default memory	2012-08-03 13:50:29 +00:00