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) 2011, 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 * ***************************************************************************
56 #include "cpuRegisters.h"
59 /*----------------------------------------------------------------------------------------
60 * D E F I N I T I O N S A N D M A C R O S
61 *----------------------------------------------------------------------------------------
64 /*----------------------------------------------------------------------------------------
65 * T Y P E D E F S A N D S T R U C T U R E S
66 *----------------------------------------------------------------------------------------
69 // typedef unsigned int uintptr_t;
71 /*----------------------------------------------------------------------------------------
72 * 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
73 *----------------------------------------------------------------------------------------
77 ExecuteFinalHltInstruction (
79 IN AP_MTRR_SETTINGS *ApMtrrSettingsList,
80 IN AMD_CONFIG_PARAMS *StdHeader
85 IN IDT_BASE_LIMIT *IdtInfo,
86 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
92 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
97 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
101 ExecuteHltInstruction (
102 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
106 ExecuteWbinvdInstruction (
107 IN AMD_CONFIG_PARAMS *StdHeader
110 /*----------------------------------------------------------------------------------------
111 * E X P O R T E D F U N C T I O N S
112 *----------------------------------------------------------------------------------------
116 //----------------------------------------------------------------------------
120 PrimaryCoreFunctions (AP_MTRR_SETTINGS *ApMtrrSettingsList)
124 // Configure the MTRRs on the AP so
125 // when it runs remote code it will execute
126 // out of RAM instead of ROM.
127 // Disable MTRRs and turn on modification enable bit
129 data = __readmsr (0xC0010010); // MTRR_SYS_CFG
130 data &= ~(1 << 18); // MtrrFixDramEn
131 data &= ~(1 << 20); // MtrrVarDramEn
132 data |= (1 << 19); // MtrrFixDramModEn
133 data |= (1 << 17); // SysUcLockEn
136 __writemsr (0xC0010010, data);
138 // Set 7FFFh-00000h and 9FFFFh-80000h as WB DRAM
139 __writemsr (0x250, 0x1E1E1E1E1E1E1E1E); // AMD_MTRR_FIX64k_00000
140 __writemsr (0x258, 0x1E1E1E1E1E1E1E1E); // AMD_MTRR_FIX16k_80000
142 // Set BFFFFh-A0000h, DFFFFh-C0000h as Uncacheable Memory-mapped IO
143 __writemsr (0x259, 0); // AMD_AP_MTRR_FIX16k_A0000
144 __writemsr (0x268, 0); // AMD_MTRR_FIX4k_C0000
145 __writemsr (0x269, 0); // AMD_MTRR_FIX4k_C8000
146 __writemsr (0x26A, 0); // AMD_MTRR_FIX4k_D0000
147 __writemsr (0x26B, 0); // AMD_MTRR_FIX4k_D8000
149 // Set FFFFFh-E0000h as Uncacheable Memory
150 for (msrno = 0x26C; msrno <= 0x26F; msrno++)
151 __writemsr (msrno, 0x1818181818181818);
153 // If IBV provided settings for Fixed-Sized MTRRs,
154 // overwrite the default settings.
155 if ((uintptr_t) ApMtrrSettingsList != 0 && (uintptr_t) ApMtrrSettingsList != 0xFFFFFFFF)
158 for (index = 0; ApMtrrSettingsList [index].MsrAddr != CPU_LIST_TERMINAL; index++)
159 __writemsr (ApMtrrSettingsList [index].MsrAddr, ApMtrrSettingsList [index].MsrData);
162 // restore variable MTTR6 and MTTR7 to default states
163 for (msrno = 0x20F; msrno <= 0x20C; msrno--) // decrement so that the pair is disable before the base is cleared
164 __writemsr (msrno, 0);
166 // Enable fixed-range and variable-range MTRRs
167 // Set Fixed-Range Enable (FE) and MTRR Enable (E) bits
168 __writemsr (0x2FF, __readmsr (0x2FF) | 0xC00);
170 // Enable Top-of-Memory setting
171 // Enable use of RdMem/WrMem bits attributes
172 data = __readmsr (0xC0010010); // MTRR_SYS_CFG
173 data |= (1 << 18); // MtrrFixDramEn
174 data |= (1 << 20); // MtrrVarDramEn
175 data &= ~(1 << 19); // MtrrFixDramModEn
176 __writemsr (0xC0010010, data);
179 //----------------------------------------------------------------------------
182 ExecuteFinalHltInstruction (
183 IN UINT32 SharedCore,
184 IN AP_MTRR_SETTINGS *ApMtrrSettingsList,
185 IN AMD_CONFIG_PARAMS *StdHeader
192 cr0val = __readcr0 ();
195 // set CombineCr0Cd and enable cache in CR0
196 __writemsr (MSR_CU_CFG3, __readmsr (MSR_CU_CFG3) | 1ULL << 49);
197 __writecr0 (cr0val & ~0x60000000);
200 __writecr0 (cr0val | 0x60000000);
202 if (SharedCore & 1) PrimaryCoreFunctions (ApMtrrSettingsList);
204 // Make sure not to touch any Shared MSR from this point on
206 // Restore settings that were temporarily overridden for the cache as ram phase
207 data = __readmsr (0xC0011022); // MSR_DC_CFG
208 data &= ~(1 << 4); // DC_DIS_SPEC_TLB_RLD
209 data &= ~(1 << 8); // DIS_CLR_WBTOL2_SMC_HIT
210 data &= ~(1 << 13); // DIS_HW_PF
211 __writemsr (0xC0011022, data);
213 data = __readmsr (0xC0011021); // MSR_IC_CFG - C001_1021
214 data &= ~(1 << 9); // IC_DIS_SPEC_TLB_RLD
215 __writemsr (0xC0011021, data);
217 // AMD_DISABLE_STACK_FAMILY_HOOK
218 __cpuid (abcdRegs, 1);
219 if ((abcdRegs [0] >> 20) == 1) //-----family 10h (Hydra) only-----
221 data = __readmsr (0xC0011022);
225 __writemsr (0xC0011022, data);
227 data = __readmsr (0xC0011021);
230 __writemsr (0xC0011021, data);
232 data = __readmsr (0xC001102A);
234 data &= ~(1ull << 35);
235 __writemsr (0xC001102A, data);
237 else if ((abcdRegs [0] >> 20) == 6) //-----family 15h (Orochi) only-----
239 data = __readmsr (0xC0011020);
241 __writemsr (0xC0011020, data);
243 data = __readmsr (0xC0011021);
245 __writemsr (0xC0011021, data);
247 data = __readmsr (0xC0011022);
250 __writemsr (0xC0011022, data);
260 //----------------------------------------------------------------------------
262 /// Structure needed to load the IDTR using the lidt instruction
266 IN IDT_BASE_LIMIT *IdtInfo,
267 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
273 //----------------------------------------------------------------------------
278 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
281 static const UINT8 opcode [] = {0x8C, 0xC8, 0xC3}; // mov eax, cs; ret
282 *Selector = ((UINT16 (*)(void)) (size_t) opcode) ();
285 //----------------------------------------------------------------------------
289 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
292 static const UINT8 opcode [] = {0xCF}; // iret
293 ((void (*)(void)) (size_t) opcode) ();
296 //----------------------------------------------------------------------------
299 ExecuteHltInstruction (
300 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
307 //---------------------------------------------------------------------------
310 ExecuteWbinvdInstruction (
311 IN AMD_CONFIG_PARAMS *StdHeader
317 //----------------------------------------------------------------------------