* Ask for a page-aligned page instead of an arbitrary address. This should

* Ask for a page-aligned page instead of an arbitrary address.  This should
  not be necessary but might be helpful and at least reduce fragmentation.
* Add an assert to detect if the wakecode ever grows too big.  We include
  1 KB for stack, which should be more than enough also.
* Remove unnecessary initialization of static variables.
* Add comments and a bootverbose print giving the page phys address.