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\ *****************************************************************************
\ * Copyright (c) 2011 IBM Corporation
\ * All rights reserved.
\ * This program and the accompanying materials
\ * are made available under the terms of the BSD License
\ * which accompanies this distribution, and is available at
\ * http://www.opensource.org/licenses/bsd-license.php
\ *
\ * Contributors:
\ * IBM Corporation - initial implementation
\ ****************************************************************************/
\ ." Populating " pwd cr
s" block" device-type
FALSE VALUE initialized?
\ Required interface for deblocker
200 VALUE block-size
8000 CONSTANT max-transfer
INSTANCE VARIABLE deblocker
/vd-len BUFFER: virtiodev
virtiodev virtio-setup-vd
\ Quiesce the virtqueue of this device so that no more background
\ transactions can be pending.
: shutdown ( -- )
initialized? IF
my-phandle node>path open-dev ?dup IF
virtiodev virtio-blk-shutdown
close-dev
THEN
FALSE to initialized?
THEN
;
\ Basic device initialization - which has only to be done once
: init ( -- )
virtiodev virtio-blk-init to block-size
TRUE to initialized?
['] shutdown add-quiesce-xt
;
\ Read multiple blocks - called by deblocker package
: read-blocks ( addr block# #blocks -- #read )
virtiodev virtio-blk-read
;
\ Standard node "open" function
: open ( -- okay? )
open 0= IF false EXIT THEN
dup initialized? 0= AND IF
init
THEN
0 0 s" deblocker" $open-package dup deblocker ! dup IF
s" disk-label" find-package IF
my-args rot interpose
THEN
THEN
0<>
;
\ Standard node "close" function
: close ( -- )
deblocker @ close-package
close
;
\ Standard node "seek" function
: seek ( pos.lo pos.hi -- status )
s" seek" deblocker @ $call-method
;
\ Standard node "read" function
: read ( addr len -- actual )
s" read" deblocker @ $call-method
;
\ Set disk alias if none is set yet
: (set-alias)
s" disk" get-next-alias ?dup IF
get-node node>path set-alias
THEN
;
(set-alias)
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