5 * HyperTransport features and sequence implementation.
7 * Implements the external AmdHtInitialize entry point.
8 * Contains routines for directing the sequence of available features.
9 * Mostly, but not exclusively, AGESA_TESTPOINT invocations should be
10 * contained in this file, and not in the feature code.
12 * From a build option perspective, it may be that a few lines could be removed
13 * from compilation in this file for certain options. It is considered that
14 * the code savings from this are too small to be of concern and this file
15 * should not have any explicit build option implementation.
17 * @xrefitem bom "File Content Label" "Release Content"
19 * @e sub-project: HyperTransport
20 * @e \$Revision: 35978 $ @e \$Date: 2010-08-07 02:18:50 +0800 (Sat, 07 Aug 2010) $
24 *****************************************************************************
26 * Copyright (C) 2012 Advanced Micro Devices, Inc.
27 * All rights reserved.
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions are met:
31 * * Redistributions of source code must retain the above copyright
32 * notice, this list of conditions and the following disclaimer.
33 * * Redistributions in binary form must reproduce the above copyright
34 * notice, this list of conditions and the following disclaimer in the
35 * documentation and/or other materials provided with the distribution.
36 * * Neither the name of Advanced Micro Devices, Inc. nor the names of
37 * its contributors may be used to endorse or promote products derived
38 * from this software without specific prior written permission.
40 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
42 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
43 * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY
44 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
45 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
48 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
49 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ***************************************************************************
55 /*----------------------------------------------------------------------------------------
56 * M O D U L E S U S E D
57 *----------------------------------------------------------------------------------------
65 /*----------------------------------------------------------------------------------------
66 * D E F I N I T I O N S A N D M A C R O S
67 *----------------------------------------------------------------------------------------
70 /*----------------------------------------------------------------------------------------
71 * T Y P E D E F S A N D S T R U C T U R E S
72 *----------------------------------------------------------------------------------------
75 /*----------------------------------------------------------------------------------------
76 * P R O T O T Y P E S O F L O C A L F U N C T I O N S
77 *----------------------------------------------------------------------------------------
112 AlignPointerTo16Byte (
113 IN OUT UINT8 **BufferPtrPtr
117 /*----------------------------------------------------------------------------------------
118 * E X P O R T E D F U N C T I O N S
119 *----------------------------------------------------------------------------------------
122 /*---------------------------------------------------------------------------------------
123 * L O C A L F U N C T I O N S
124 *---------------------------------------------------------------------------------------
129 //----------------------------------------------------------------------------
132 MemUWriteCachelines (
140 __m128i *Src = (void *) Pattern;
141 __m128i *Dest = (void *) (size_t)Address;
143 Position = (void *) Pattern;
145 // ssd - important: without this, the src data may get evicted from cache
148 for (Index = 0; Index < ClCount * 4; Index++){
149 _mm_stream_si128_fs (Dest, Src);
154 // ssd - might not be required, but no measurable boot time impact
159 //----------------------------------------------------------------------------
160 // MemUReadCachelines:
162 // Read a pattern of 72 bit times (per DQ), to test dram functionality. The
163 // pattern is a stress pattern which exercises both ISI and crosstalk. The number
164 // of cache lines to fill is dependent on DCT width mode and burstlength.
166 // In: Buffer - pointer to a buffer where read data will be stored
167 // Address - Physical address to be read
168 // ClCount - number of cachelines to be read
180 for (Index = 0; Index < ClCount * 16; Index++) {
181 Dest = (void *) &Buffer [Index * 4];
182 *Dest = __readfsdword (Address + Index * 4);
187 //----------------------------------------------------------------------------
190 // Perform a single cache line read from a given physical address.
192 // In: Address - Physical address to be read
193 // ClCount - number of cachelines to be read
195 //FUNC_ATTRIBUTE (noinline)
202 __readfsbyte (Address);
205 //----------------------------------------------------------------------------
215 //----------------------------------------------------------------------------
218 // Flush a pattern of 72 bit times (per DQ) from cache. This procedure is used
219 // to ensure cache miss on the next read training.
221 // In: Address - Physical address to be flushed
222 // ClCount - number of cachelines to be flushed
223 //FUNC_ATTRIBUTE(noinline)
232 // ssd - theory: a tlb flush is needed to avoid problems with clflush
233 __writemsr (0x20F, __readmsr (0x20F));
235 for (Index = 0; Index < ClCount; Index++) {
236 // mfence prevents speculative execution of the clflush
238 _mm_clflush_fs ((void *) (size_t) (Address + Index * 64));
242 //----------------------------------------------------------------------------
244 //FUNC_ATTRIBUTE(noinline)
246 AlignPointerTo16Byte (
247 IN OUT UINT8 **BufferPtrPtr
250 size_t Address = (size_t) *BufferPtrPtr;
252 Address -= Address % 16;
253 *BufferPtrPtr = (void *) Address;
256 //----------------------------------------------------------------------------