freebsd-dev/sys/amd64
Mike Smith 595bd0d58e Lightly overhaul the memory sizing code again.
- The kernel environment variable 'hw.physmem' can be used to set the
   amount of physical memory space, based at 0, that FreeBSD will use.
   Any memory detected over this limit is ignored.  Documentation for
   this is available under 'help set tunables' in the loader.

 - In the case where system memory size can't be accurately determined,
   hw.physmem is used as a best-guess memory size, but speculative
   probing will be used to determine actual memory size if any of the
   guesses or hints are 16M or more.

 - If RB_VERBOSE, we list the memory regions as we test them.

 - The compile-time option MAXMEM supplies a default value for
   'hw.physmem'.
1999-07-02 20:33:32 +00:00
..
amd64 Lightly overhaul the memory sizing code again. 1999-07-02 20:33:32 +00:00
conf Put on my asbestos suit and attempt to tidy up and add some simple docs 1999-06-29 18:55:53 +00:00
include Changes in the way that the APs are started appears to have removed the 1999-06-23 23:02:38 +00:00
isa Shut up gcc. 1999-06-27 09:08:48 +00:00
pci Move pcibus (host -> pci bus) probe/attach routines from nexus 1999-05-18 20:48:43 +00:00
Makefile Update to know about current kernel directory layout. 1999-02-28 22:14:16 +00:00