\ ========== Copyright Header Begin ========================================== \ \ Hypervisor Software File: hotplugdetect.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: @(#)hotplugdetect.fth 1.1 06/04/05 15:50:27 copyright: Copyright 2006 Sun Microsystems, Inc. All Rights Reserved copyright: Use is subject to license terms. headerless \ Hot plug capability detection code to be used \ in pci bridge code. \ Called only if pcie capability is present. Called with the \ offset of pcie capability register. Check pcie capability \ for downstream port type, slot implemented and slot capability \ for hotplug capability of the slot. : pcie-hotplug-capable? ( offs -- flag ) >r r@ 2+ my-w@ ( pcie-cap ) ( R: offs ) dup 4 >> h# f and 6 = swap ( downstream? pcie-cap ) h# 100 and and if ( ) ( R: offs ) \ downstream port and slot implemented. \ check for hotplug capable bit in \ slot capability register r> d# 20 + my-l@ h# 40 and 0<> ( flag ) else \ upstream port or slot not implemented r> drop false ( false ) then ; \ Called only if pcie capability is present. Called with \ the offset of pcie capability register. Check pcie \ capability for downstream port type and slot implemented. : pcie-slot-implemented? ( offs -- flag ) 2+ my-w@ ( pcie-cap ) dup 4 >> h# f and 6 = swap ( downstream? pcie-cap ) h# 100 and and ( flag ) ; \ Identifying a "hotplug-capable" bridge. If capability \ ptr is implemented then we search for the existence of \ SHPC capability. If SHPC capability is present then we \ say that the bridge supports hotplug. If no SHPC, then \ if PCIE capability is present then we check the slot \ capability for the presence of hotplug capability. If \ present then it is hotplug capable. : hotplug-capability? ( -- flag ) shpc-capability-regs if true exit then pcie-capability-regs ?dup if ( offs ) pcie-hotplug-capable? ( flag ) else false ( false ) then ; \ Since there is no way to tell if a pcie-pcix bridge has \ physical slot underneath it, we resort to finding if \ the bridge is hotplug capable and hence has slot \ underneath. For a pcie port,it is possible to find if \ there is physical slot implemented by looking at pci \ express capability. : slot-implemented? ( -- flag ) \ SHPC Capability? shpc-capability-regs if true exit then pcie-capability-regs ?dup if ( offs ) pcie-slot-implemented? ( flag ) else ( ) false ( false ) then ;