5 * Northbridge generic non-coherent support routines.
7 * @xrefitem bom "File Content Label" "Release Content"
9 * @e sub-project: HyperTransport
10 * @e \$Revision: 56279 $ @e \$Date: 2011-07-11 13:11:28 -0600 (Mon, 11 Jul 2011) $
14 *****************************************************************************
16 * Copyright (C) 2012 Advanced Micro Devices, Inc.
17 * All rights reserved.
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are met:
21 * * Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * * Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * * Neither the name of Advanced Micro Devices, Inc. nor the names of
27 * its contributors may be used to endorse or promote products derived
28 * from this software without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
32 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
33 * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY
34 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
35 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
36 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
37 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
39 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 * ***************************************************************************
46 *----------------------------------------------------------------------------
49 *----------------------------------------------------------------------------
60 #include "htNbCommonHardware.h"
61 #include "htNbNonCoherent.h"
66 #define FILECODE PROC_HT_NBCOMMON_HTNBNONCOHERENT_FILECODE
67 /*----------------------------------------------------------------------------
68 * DEFINITIONS AND MACROS
70 *----------------------------------------------------------------------------
73 /***************************************************************************
74 *** Non-coherent init code ***
75 *** Northbridge access routines ***
76 ***************************************************************************/
78 /*----------------------------------------------------------------------------------------*/
80 * Return the Link to the Southbridge
82 * @HtNbMethod{::F_READ_SB_LINK}
84 * @param[in] Nb this northbridge
86 * @return the Link to the southbridge
95 Reg.AddressValue = MAKE_SBDFO (MakePciSegmentFromNode (0),
96 MakePciBusFromNode (0),
97 MakePciDeviceFromNode (0),
100 LibAmdPciReadBits (Reg, 10, 8, &Temp, Nb->ConfigHandle);
104 /*----------------------------------------------------------------------------------------*/
106 * Verify that the Link is non-coherent, connected, and ready
108 * @HtNbMethod{::F_VERIFY_LINK_IS_NON_COHERENT}
110 * @param[in] Node the Node that will be examined
111 * @param[in] Link the Link on that Node to examine
112 * @param[in] Nb this northbridge
114 * @retval TRUE The Link has the following status
115 * - LinkCon=1, Link is connected
116 * - InitComplete=1, Link initialization is complete
117 * - NC=1, Link is noncoherent
118 * - UniP-cLDT=0, Link is not Uniprocessor cLDT
119 * - LinkConPend=0 Link connection is not pending
120 * @retval FALSE The Link has some other status
123 VerifyLinkIsNonCoherent (
132 ASSERT ((Node < MAX_NODES) && (Link < MAX_NODES));
134 LinkBase = Nb->MakeLinkBase (Node, Link, Nb);
135 LinkBase.Address.Register += HTHOST_LINK_TYPE_REG;
137 // FN0_98/A4/C4 = LDT Type Register
138 LibAmdPciRead (AccessWidth32, LinkBase, &LinkType, Nb->ConfigHandle);
140 // Verify LinkCon = 1, InitComplete = 1, NC = 1, UniP-cLDT = 0, LinkConPend = 0
141 return (BOOLEAN) ((LinkType & HTHOST_TYPE_MASK) == HTHOST_TYPE_NONCOHERENT);