Rafal Jaworowski 959aea56c1 Improve kernel stack handling on e500.
- Allocate thread0.td_kstack in pmap_bootstrap(), provide guard page
- Switch to thread0.td_kstack as soon as possible i.e. right after return
  from e500_init() and before mi_startup() happens
- Clean up temp stack area
- Other minor cosmetics in machdep.c

Obtained from:	Semihalf
2008-08-26 17:07:37 +00:00
..
2008-04-27 17:13:22 +00:00