58 lines
1.6 KiB
Forth
58 lines
1.6 KiB
Forth
\ *****************************************************************************
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\ * Copyright (c) 2004, 2008 IBM Corporation
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\ * All rights reserved.
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\ * This program and the accompanying materials
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\ * are made available under the terms of the BSD License
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\ * which accompanies this distribution, and is available at
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\ * http://www.opensource.org/licenses/bsd-license.php
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\ *
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\ * Contributors:
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\ * IBM Corporation - initial implementation
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\ ****************************************************************************/
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100 CONSTANT quiesce-xt#
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\ The array with the quiesce execution tokens:
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CREATE quiesce-xts quiesce-xt# cells allot
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quiesce-xts quiesce-xt# cells erase
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0 VALUE quiesce-done?
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\ Add a token to the quiesce execution token array:
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: add-quiesce-xt ( xt -- )
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quiesce-xt# 0 DO
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quiesce-xts I cells + ( xt arrayptr )
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dup @ 0= ( xt arrayptr true|false )
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IF
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! UNLOOP EXIT
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ELSE ( xt arrayptr )
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over swap ( xt xt arrayptr )
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@ = \ xt already stored ?
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IF
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drop UNLOOP EXIT
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THEN ( xt )
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THEN
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LOOP
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drop ( xt -- )
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." Warning: quiesce xt list is full." cr
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;
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\ The quiesce call asserts that the firmware and all hardware
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\ is in a sane state (e.g. assert that no background DMA is
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\ running anymore)
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: quiesce ( -- )
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quiesce-done? IF EXIT THEN
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true to quiesce-done?
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quiesce-xt# 0 DO
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quiesce-xts I cells + ( arrayptr )
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@ dup IF ( xt )
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EXECUTE
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ELSE
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drop UNLOOP EXIT
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THEN
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LOOP
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;
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