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 *----------------------------------------------------------------------------------------
78 IN IDT_BASE_LIMIT *IdtInfo,
79 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
85 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
90 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
94 ExecuteHltInstruction (
95 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
99 ExecuteWbinvdInstruction (
100 IN AMD_CONFIG_PARAMS *StdHeader
103 /*----------------------------------------------------------------------------------------
104 * E X P O R T E D F U N C T I O N S
105 *----------------------------------------------------------------------------------------
109 //----------------------------------------------------------------------------
113 PrimaryCoreFunctions (AP_MTRR_SETTINGS *ApMtrrSettingsList)
117 // Configure the MTRRs on the AP so
118 // when it runs remote code it will execute
119 // out of RAM instead of ROM.
120 // Disable MTRRs and turn on modification enable bit
122 data = __readmsr (0xC0010010); // MTRR_SYS_CFG
123 data &= ~(1 << 18); // MtrrFixDramEn
124 data &= ~(1 << 20); // MtrrVarDramEn
125 data |= (1 << 19); // MtrrFixDramModEn
126 data |= (1 << 17); // SysUcLockEn
129 __writemsr (0xC0010010, data);
131 // Set 7FFFh-00000h and 9FFFFh-80000h as WB DRAM
132 __writemsr (0x250, 0x1E1E1E1E1E1E1E1E); // AMD_MTRR_FIX64k_00000
133 __writemsr (0x258, 0x1E1E1E1E1E1E1E1E); // AMD_MTRR_FIX16k_80000
135 // Set BFFFFh-A0000h, DFFFFh-C0000h as Uncacheable Memory-mapped IO
136 __writemsr (0x259, 0); // AMD_AP_MTRR_FIX16k_A0000
137 __writemsr (0x268, 0); // AMD_MTRR_FIX4k_C0000
138 __writemsr (0x269, 0); // AMD_MTRR_FIX4k_C8000
139 __writemsr (0x26A, 0); // AMD_MTRR_FIX4k_D0000
140 __writemsr (0x26B, 0); // AMD_MTRR_FIX4k_D8000
142 // Set FFFFFh-E0000h as Uncacheable Memory
143 for (msrno = 0x26C; msrno <= 0x26F; msrno++)
144 __writemsr (msrno, 0x1818181818181818);
146 // If IBV provided settings for Fixed-Sized MTRRs,
147 // overwrite the default settings.
148 if ((uintptr_t) ApMtrrSettingsList != 0 && (uintptr_t) ApMtrrSettingsList != 0xFFFFFFFF)
151 for (index = 0; ApMtrrSettingsList [index].MsrAddr != CPU_LIST_TERMINAL; index++)
152 __writemsr (ApMtrrSettingsList [index].MsrAddr, ApMtrrSettingsList [index].MsrData);
155 // restore variable MTTR6 and MTTR7 to default states
156 for (msrno = 0x20F; msrno <= 0x20C; msrno--) // decrement so that the pair is disable before the base is cleared
157 __writemsr (msrno, 0);
159 // Enable fixed-range and variable-range MTRRs
160 // Set Fixed-Range Enable (FE) and MTRR Enable (E) bits
161 __writemsr (0x2FF, __readmsr (0x2FF) | 0xC00);
163 // Enable Top-of-Memory setting
164 // Enable use of RdMem/WrMem bits attributes
165 data = __readmsr (0xC0010010); // MTRR_SYS_CFG
166 data |= (1 << 18); // MtrrFixDramEn
167 data |= (1 << 20); // MtrrVarDramEn
168 data &= ~(1 << 19); // MtrrFixDramModEn
169 __writemsr (0xC0010010, data);
172 //----------------------------------------------------------------------------
175 ExecuteFinalHltInstruction (
176 IN UINT32 SharedCore,
177 IN AP_MTRR_SETTINGS *ApMtrrSettingsList,
178 IN AMD_CONFIG_PARAMS *StdHeader
185 cr0val = __readcr0 ();
188 // set CombineCr0Cd and enable cache in CR0
189 __writemsr (MSR_CU_CFG3, __readmsr (MSR_CU_CFG3) | 1ULL << 49);
190 __writecr0 (cr0val & ~0x60000000);
193 __writecr0 (cr0val | 0x60000000);
195 if (SharedCore & 1) PrimaryCoreFunctions (ApMtrrSettingsList);
197 // Make sure not to touch any Shared MSR from this point on
199 // Restore settings that were temporarily overridden for the cache as ram phase
200 data = __readmsr (0xC0011022); // MSR_DC_CFG
201 data &= ~(1 << 4); // DC_DIS_SPEC_TLB_RLD
202 data &= ~(1 << 8); // DIS_CLR_WBTOL2_SMC_HIT
203 data &= ~(1 << 13); // DIS_HW_PF
204 __writemsr (0xC0011022, data);
206 data = __readmsr (0xC0011021); // MSR_IC_CFG - C001_1021
207 data &= ~(1 << 9); // IC_DIS_SPEC_TLB_RLD
208 __writemsr (0xC0011021, data);
210 // AMD_DISABLE_STACK_FAMILY_HOOK
211 __cpuid (abcdRegs, 1);
212 if ((abcdRegs [0] >> 20) == 1) //-----family 10h (Hydra) only-----
214 data = __readmsr (0xC0011022);
218 __writemsr (0xC0011022, data);
220 data = __readmsr (0xC0011021);
223 __writemsr (0xC0011021, data);
225 data = __readmsr (0xC001102A);
227 data &= ~(1ull << 35);
228 __writemsr (0xC001102A, data);
230 else if ((abcdRegs [0] >> 20) == 6) //-----family 15h (Orochi) only-----
232 data = __readmsr (0xC0011020);
234 __writemsr (0xC0011020, data);
236 data = __readmsr (0xC0011021);
238 __writemsr (0xC0011021, data);
240 data = __readmsr (0xC0011022);
243 __writemsr (0xC0011022, data);
253 //----------------------------------------------------------------------------
255 /// Structure needed to load the IDTR using the lidt instruction
259 IN IDT_BASE_LIMIT *IdtInfo,
260 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
266 //----------------------------------------------------------------------------
271 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
274 static const UINT8 opcode [] = {0x8C, 0xC8, 0xC3}; // mov eax, cs; ret
275 *Selector = ((UINT16 (*)(void)) (size_t) opcode) ();
278 //----------------------------------------------------------------------------
282 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
285 static const UINT8 opcode [] = {0xCF}; // iret
286 ((void (*)(void)) (size_t) opcode) ();
289 //----------------------------------------------------------------------------
292 ExecuteHltInstruction (
293 IN OUT AMD_CONFIG_PARAMS *StdHeaderPtr
300 //---------------------------------------------------------------------------
303 ExecuteWbinvdInstruction (
304 IN AMD_CONFIG_PARAMS *StdHeader
310 //----------------------------------------------------------------------------