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Hash :
1a08f436
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Date :
2010-08-25T09:23:17
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\ ========== Copyright Header Begin ==========================================
\
\ Hypervisor Software File: scrubmem.fth
\
\ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
\
\ - Do no alter or remove copyright notices
\
\ - Redistribution and use of this software in source and binary forms, with
\ or without modification, are permitted provided that the following
\ conditions are met:
\
\ - Redistribution of source code must retain the above copyright notice,
\ this list of conditions and the following disclaimer.
\
\ - Redistribution in binary form must reproduce the above copyright notice,
\ this list of conditions and the following disclaimer in the
\ documentation and/or other materials provided with the distribution.
\
\ Neither the name of Sun Microsystems, Inc. or the names of contributors
\ may be used to endorse or promote products derived from this software
\ without specific prior written permission.
\
\ This software is provided "AS IS," without a warranty of any kind.
\ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
\ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
\ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
\ MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
\ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
\ DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN
\ OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
\ FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
\ DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
\ ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
\ SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
\
\ You acknowledge that this software is not designed, licensed or
\ intended for use in the design, construction, operation or maintenance of
\ any nuclear facility.
\
\ ========== Copyright Header End ============================================
id: @(#)scrubmem.fth 2.39 06/02/16
purpose:
copyright: Copyright 2006 Sun Microsystems, Inc. All Rights Reserved
copyright: Use is subject to license terms.
\ Clear memory to establish valid check bits.
\ This depends on the availmemory list organization defined in memlist.fth
defer scrub-bank ( padr-lo padr-hi size -- )
headerless
stand-init: Init scrub-bank
fpu-enabled? if ['] bclear-memory-4MB else ['] clear-memory then
is scrub-bank
;
" /memory" find-device
: scrub-4meg ( pa.lo pa.hi len -- ) lock[ 4meg min scrub-bank ]unlock ;
: .megs ( n -- )
push-decimal ( n ) ( r: base )
1meg round-up 1meg / \ Modulo 1MB
dup h# fff and if \ Even GB count?
5 u.r ." MB" \ No, list in MegaBytes
else ( n ) ( r: base )
d# 10 rshift 5 u.r ." GB" \ Yes, list in GigaBytes
then ( ) ( r: base )
pop-base ( )
;
: next-chunk ( adr,len chunk -- adr+chunk len+chunk )
2dup > if /string exit then
drop + 0
;
: .mem-progress ( megabytes -- megabytes )
\ d# 29 to match ".5GB" check in 'scrub-node' below
dup d# 29 rshift 4 mod " -/|\" drop + c@ emit 1 backspaces
;
: .initializing ( pa.lo pa.hi len -- pa.lo pa.hi len )
min+mode? if
3dup nip ( pa.lo pa.hi len pa.lo len )
." Initializing " .megs ." of memory at addr " .nx
1 spaces ( pa.lo pa.hi len )
then
;
\ Routine for use with find-node. Scrubs the nodes memory, returning
\ false so that every node will be processed.
: scrub-node ( node-adr -- false )
node-range pages>phys-adr,len ( pa.lo pa.hi len )
.initializing ( pa.lo pa.hi len )
swap >r ( pa.lo len ) ( r: pa.hi )
min+mode? -rot ( flag pa.lo len ) ( r: pa.hi )
begin ( flag pa.lo len ) ( r: pa.hi )
2dup r@ swap scrub-4meg ( flag pa.lo len ) ( r: pa.hi )
4meg next-chunk ( flag pa.lo+ len- ) ( r: pa.hi )
2 pick if ( flag pa.lo+ len- ) ( r: pa.hi )
\ Slow down idle chatter...only every .5GB or so...often
\ enough to indicate "still alive" yet not slow us down
dup h# 1ff00000 and 0= if ( flag pa.lo+ len- ) ( r: pa.hi )
.mem-progress ( flag pa.lo+ len- ) ( r: pa.hi )
then ( flag pa.lo+ len- ) ( r: pa.hi )
then ( flag pa.lo+ len- ) ( r: pa.hi )
dup 0<= ( flag pa.lo+ len- ) ( r: pa.hi )
until ( flag pa.lo+ len- ) ( r: pa.hi )
r> 3drop false ( flag false )
swap if (cr d# 70 spaces (cr then ( flag false )
;
headers
: scrub-memory ( -- )
memory-clean? @ 0= if
physavail ['] scrub-node find-node 2drop
first-phys-avail drop 0 4meg map-pages
memory-clean? on
['] clear-memory is clear-mem
then
;
device-end