Branch
Hash :
1a08f436
Author :
Date :
2010-08-25T09:23:17
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\ ========== Copyright Header Begin ==========================================
\
\ Hypervisor Software File: switchcpu.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: @(#)switchcpu.fth 1.14 02/09/20
purpose:
copyright: Copyright 1995-2002 Sun Microsystems, Inc. All Rights Reserved
copyright: Use is subject to license terms.
headerless
: cpu-status? ( cpu status -- flag )
over mid-ok? if
swap >cpu-struct >cpu-status @ =
else
2drop false
then
;
: cpu-started? ( cpu# -- flag ) CPU-STARTED cpu-status? ;
: cpu-idled? ( cpu# -- flag ) CPU-PARKED cpu-status? ;
: idle-cpu ( cpu# -- )
dup cpu-started? over mid@ <> and if ( cpu# )
xcall-idle-cpu ( fail? )
then drop ( )
;
: resume-cpu ( cpu# -- )
dup cpu-idled? over mid@ <> and if ( cpu# )
xcall-resume-cpu ( fail? )
then drop ( )
;
: idle-other-cpus ( -- ) ['] idle-cpu do-foreach-cpu ;
: resume-other-cpus ( -- ) ['] resume-cpu do-foreach-cpu ;
headers
: switch-cpu ( cpu# -- )
\ Simply return if cpu# is the currently running CPU
dup mid@ = if drop exit then
dup mid-ok? if ( cpu# )
dup xcall-get-pc 0= if ( cpu# pc )
drop ( cpu# )
dup idle-cpu ( cpu# )
dup >cpu-struct >cpu-status @ ( cpu# status )
CPU-IDLING <> if ( cpu# )
d# 5 0 do dup cpu-idled? ?leave d# 100 ms loop
dup cpu-idled? ( cpu# switch? )
else ( cpu# )
true ( cpu# true )
then ( cpu# switch? )
if master-release-prom else drop then
then
then ( )
drop ." CPU not responding" cr
;
chain: enterforth-chain
idle-other-cpus
;
chain: go-chain
resume-other-cpus
;