CVS commit: src/sys/arch/powerpc/oea

["Jason R Thorpe" <thorpej%netbsd.org@localhost>]

Module Name:    src
Committed By:   thorpej
Date:           Wed Mar 10 18:29:07 UTC 2021

Modified Files:
        src/sys/arch/powerpc/oea: pmap.c

Log Message:
- In pmap_bootstrap1(), make sure to initialize pmap_kernel()->pm_vsid
  with the kernel's base VSID.
- In va_to_vsid(), always compute the VSID from the base VSID in the
  pmap and the effective segment ID (ESID), rather than extracting it
  from the pmap's segment register value for that ESID.  Not only does
  this make the code the same between OEA and OEA64, but is also lets
  us compute the correct VSID for that pmap/ESID even if the cached SR
  for that ESID currently contains something else, such as an I/O segment
  mapping (as might be the case on a 601).

With this change, we can temporarily toggle between an I/O segment and
and HTAB-mapped segment if needed (e.g. when calling OpenFirmware on
a 601-based system).


To generate a diff of this commit:
cvs rdiff -u -r1.101 -r1.102 src/sys/arch/powerpc/oea/pmap.c

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