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\ Hypervisor Software File: memprobe.fth
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id: @(#)memprobe.fth 1.3 06/11/09
purpose:
copyright: Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved
copyright: Use is subject to license terms.

headerless

" /memory" find-device

: (free-range) ( xdr,len adr size  -- xdr,len' )
   over bytes>pages hi-memory-base @
   h# 3ff invert and <>  if			( xdr,len adr,size )
      2dup obmem swap				( xdr,len adr,size lo hi size )
      phys-adr,len>pages			( xdr,len adr,size pg# #pgs )
      physavail  free-memrange			( xdr,len adr,size )
   then						( xdr,len adr,size )
   >r xlsplit swap >r encode-int encode+  r> encode-int encode+
   r> xlsplit swap >r encode-int encode+  r> encode-int encode+
;

headers
\ Track the upper memory address available; we do this so the
\ memory? is efficient - the address shifting trick does not work.
\
: probe-memory ( -- )
   0 0 encode-bytes					( xdr,len )
   0							( xdr,len node )
   begin
      " mblock" md-find-node ?dup
   while						( xdr,len node )
      dup " base" ascii v md-find-prop ?dup if	( xdr,len node entry )
         md-decode-prop drop				( xdr,len node adr )
         over " size" ascii v md-find-prop ?dup if  ( xdr,len node adr entry )
            md-decode-prop drop		    	    ( xdr,len node adr len )
	    2dup + physmax  2dup @ < if  2drop else ! then
            rot >r (free-range) r>			( xdr',len' node )
         else
            drop					( xdr,len node )
         then						( xdr,len node )
      then						( xdr,len node )
   repeat						( xdr,len )
   " reg" property
;
device-end

stand-init: Build memory nodes
   " probe-memory" memory-node @ $call-method
;