CVS commit: [netbsd-6] src/sys/arch

["Jeff Rizzo" <riz%netbsd.org@localhost>]

Module Name:    src
Committed By:   riz
Date:           Wed Feb 22 18:59:06 UTC 2012

Modified Files:
        src/sys/arch/x86/x86 [netbsd-6]: pmap.c
        src/sys/arch/xen/x86 [netbsd-6]: cpu.c

Log Message:
Pull up following revision(s) (requested by bouyer in ticket #31):
        sys/arch/x86/x86/pmap.c: revision 1.166
        sys/arch/xen/x86/cpu.c: revision 1.83
- Make pmap_write_protect() work with pmap_kernel() too ((va & L2_FRAME)
  strips the high bits of a LP64 address)
- use pmap_protect() in pmap_pdp_ctor() to remap the PDP read-only instead
  of (ab)using pmap_kenter_pa(). No more "mapping already present" on
  console with DIAGNOSTIC kernels
- make sure to zero the whole PDP (NTOPLEVEL_PDES doens't include
  high-level entries on i386 and i386PAE, reserved by Xen). Not sure
  how it has worked before
- remove an always-true test (&& pmap != pmap_kernel(); we KASSERT that
  at the function entry).
use pmap_protect() instead of pmap_kenter_pa() to remap R/O an exiting
page. This gets rid of the last "mapping already present" warnings.


To generate a diff of this commit:
cvs rdiff -u -r1.164.2.1 -r1.164.2.2 src/sys/arch/x86/x86/pmap.c
cvs rdiff -u -r1.80.2.1 -r1.80.2.2 src/sys/arch/xen/x86/cpu.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.