freebsd-nq/sys/amd64
Alan Cox 6031c68de4 The page flag PGA_WRITEABLE is set and cleared exclusively by the pmap
layer, but it is read directly by the MI VM layer.  This change introduces
pmap_page_is_write_mapped() in order to completely encapsulate all direct
access to PGA_WRITEABLE in the pmap layer.

Aesthetics aside, I am making this change because amd64 will likely begin
using an alternative method to track write mappings, and having
pmap_page_is_write_mapped() in place allows me to make such a change
without further modification to the MI VM layer.

As an added bonus, tidy up some nearby comments concerning page flags.

Reviewed by:	kib
MFC after:	6 weeks
2012-06-16 18:56:19 +00:00
..
acpica - Remove unused code for CR3 and CR4. 2012-06-13 22:53:56 +00:00
amd64 Update a couple comments to reflect r235598. 2012-06-14 17:47:54 +00:00
compile
conf Oops - use the actual 11n enable option. 2012-06-15 15:32:16 +00:00
ia32 Eliminate ia32_reg.h by moving its contents to x86 and ia64 reg.h. 2012-03-18 19:12:11 +00:00
include The page flag PGA_WRITEABLE is set and cleared exclusively by the pmap 2012-06-16 18:56:19 +00:00
linux32 Regenerate system call tables. 2012-05-25 21:52:57 +00:00
pci Move {amd64,i386}/pci/pci_bus.c and {amd64,i386}/include/pci_cfgreg.h to 2011-06-22 21:04:13 +00:00
Makefile Adjustments to make a tags file a bit more suitable to amd64. 2008-12-01 14:15:10 +00:00