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\ *****************************************************************************
\ * Copyright (c) 2004, 2008 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
\ ****************************************************************************/
\ Generic disk support
\ Input:
\ name of device ( e.g. "disk", "cdrom", ... )
\ dev#
\ Needs from parent in device tree:
\ dev-read-blocks ( addr block# #blocks phys.lo ... phys.hi -- #read )
\ block-size
\ max-transfer
\ Provides:
\ open ( -- okay? )
\ close ( -- )
\ read ( addr len -- actual )
\ seek ( pos.lo pos.hi -- status )
\ read-blocks ( addr block# #blocks -- #read )
\ Uses:
\ disk-label package interpose for partition and file systems support
\ deblocker package for byte read support
( str len phys.lo ... phys.hi -- )
new-device set-unit ( str len )
2dup device-name
s" 0 pci-alias-" 2swap $cat evaluate
s" block" device-type
\ Requiered interface for deblocker
s" block-size" $call-parent CONSTANT block-size
s" max-transfer" $call-parent CONSTANT max-transfer
: read-blocks ( addr block# #blocks -- #read )
my-unit s" dev-read-blocks" $call-parent
;
INSTANCE VARIABLE deblocker
: open ( -- okay? )
0 0 s" deblocker" $open-package dup deblocker ! dup IF
s" disk-label" find-package IF
my-args rot interpose
THEN
THEN 0<> ;
: close ( -- )
deblocker @ close-package ;
: seek ( pos.lo pos.hi -- status )
s" seek" deblocker @ $call-method ;
: read ( addr len -- actual )
s" read" deblocker @ $call-method ;
finish-device
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