1 files changed, 68 insertions, 0 deletions
diff --git a/roms/SLOF/slof/fs/generic-disk.fs b/roms/SLOF/slof/fs/generic-disk.fs
new file mode 100644
index 00000000..0543c890
--- /dev/null
+++ b/roms/SLOF/slof/fs/generic-disk.fs
@@ -0,0 +1,68 @@
+\ *****************************************************************************
+\ * 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