]>
Commit | Line | Data |
---|---|---|
1 | /** @file | |
2 | Machine Check features. | |
3 | ||
4 | Copyright (c) 2017, Intel Corporation. All rights reserved.<BR> | |
5 | This program and the accompanying materials | |
6 | are licensed and made available under the terms and conditions of the BSD License | |
7 | which accompanies this distribution. The full text of the license may be found at | |
8 | http://opensource.org/licenses/bsd-license.php | |
9 | ||
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
12 | ||
13 | **/ | |
14 | ||
15 | #include "CpuCommonFeatures.h" | |
16 | ||
17 | /** | |
18 | Detects if Machine Check Exception feature supported on current processor. | |
19 | ||
20 | @param[in] ProcessorNumber The index of the CPU executing this function. | |
21 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION | |
22 | structure for the CPU executing this function. | |
23 | @param[in] ConfigData A pointer to the configuration buffer returned | |
24 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if | |
25 | CPU_FEATURE_GET_CONFIG_DATA was not provided in | |
26 | RegisterCpuFeature(). | |
27 | ||
28 | @retval TRUE Machine Check Exception feature is supported. | |
29 | @retval FALSE Machine Check Exception feature is not supported. | |
30 | ||
31 | @note This service could be called by BSP/APs. | |
32 | **/ | |
33 | BOOLEAN | |
34 | EFIAPI | |
35 | MceSupport ( | |
36 | IN UINTN ProcessorNumber, | |
37 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, | |
38 | IN VOID *ConfigData OPTIONAL | |
39 | ) | |
40 | { | |
41 | return (CpuInfo->CpuIdVersionInfoEdx.Bits.MCE == 1); | |
42 | } | |
43 | ||
44 | /** | |
45 | Initializes Machine Check Exception feature to specific state. | |
46 | ||
47 | @param[in] ProcessorNumber The index of the CPU executing this function. | |
48 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION | |
49 | structure for the CPU executing this function. | |
50 | @param[in] ConfigData A pointer to the configuration buffer returned | |
51 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if | |
52 | CPU_FEATURE_GET_CONFIG_DATA was not provided in | |
53 | RegisterCpuFeature(). | |
54 | @param[in] State If TRUE, then the Machine Check Exception feature must be enabled. | |
55 | If FALSE, then the Machine Check Exception feature must be disabled. | |
56 | ||
57 | @retval RETURN_SUCCESS Machine Check Exception feature is initialized. | |
58 | ||
59 | @note This service could be called by BSP only. | |
60 | **/ | |
61 | RETURN_STATUS | |
62 | EFIAPI | |
63 | MceInitialize ( | |
64 | IN UINTN ProcessorNumber, | |
65 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, | |
66 | IN VOID *ConfigData, OPTIONAL | |
67 | IN BOOLEAN State | |
68 | ) | |
69 | { | |
70 | // | |
71 | // Set MCE bit in CR4 | |
72 | // | |
73 | CPU_REGISTER_TABLE_WRITE_FIELD ( | |
74 | ProcessorNumber, | |
75 | ControlRegister, | |
76 | 4, | |
77 | IA32_CR4, | |
78 | Bits.MCE, | |
79 | (State) ? 1 : 0 | |
80 | ); | |
81 | return RETURN_SUCCESS; | |
82 | } | |
83 | ||
84 | /** | |
85 | Detects if Machine Check Architecture feature supported on current processor. | |
86 | ||
87 | @param[in] ProcessorNumber The index of the CPU executing this function. | |
88 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION | |
89 | structure for the CPU executing this function. | |
90 | @param[in] ConfigData A pointer to the configuration buffer returned | |
91 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if | |
92 | CPU_FEATURE_GET_CONFIG_DATA was not provided in | |
93 | RegisterCpuFeature(). | |
94 | ||
95 | @retval TRUE Machine Check Architecture feature is supported. | |
96 | @retval FALSE Machine Check Architecture feature is not supported. | |
97 | ||
98 | @note This service could be called by BSP/APs. | |
99 | **/ | |
100 | BOOLEAN | |
101 | EFIAPI | |
102 | McaSupport ( | |
103 | IN UINTN ProcessorNumber, | |
104 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, | |
105 | IN VOID *ConfigData OPTIONAL | |
106 | ) | |
107 | { | |
108 | return (CpuInfo->CpuIdVersionInfoEdx.Bits.MCA == 1); | |
109 | } | |
110 | ||
111 | /** | |
112 | Initializes Machine Check Architecture feature to specific state. | |
113 | ||
114 | @param[in] ProcessorNumber The index of the CPU executing this function. | |
115 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION | |
116 | structure for the CPU executing this function. | |
117 | @param[in] ConfigData A pointer to the configuration buffer returned | |
118 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if | |
119 | CPU_FEATURE_GET_CONFIG_DATA was not provided in | |
120 | RegisterCpuFeature(). | |
121 | @param[in] State If TRUE, then the Machine Check Architecture feature must be enabled. | |
122 | If FALSE, then the Machine Check Architecture feature must be disabled. | |
123 | ||
124 | @retval RETURN_SUCCESS Machine Check Architecture feature is initialized. | |
125 | ||
126 | @note This service could be called by BSP only. | |
127 | **/ | |
128 | RETURN_STATUS | |
129 | EFIAPI | |
130 | McaInitialize ( | |
131 | IN UINTN ProcessorNumber, | |
132 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, | |
133 | IN VOID *ConfigData, OPTIONAL | |
134 | IN BOOLEAN State | |
135 | ) | |
136 | { | |
137 | MSR_IA32_MCG_CAP_REGISTER McgCap; | |
138 | UINT32 BankIndex; | |
139 | ||
140 | McgCap.Uint64 = AsmReadMsr64 (MSR_IA32_MCG_CAP); | |
141 | for (BankIndex = 0; BankIndex < (UINT32) McgCap.Bits.Count; BankIndex++) { | |
142 | CPU_REGISTER_TABLE_WRITE64 ( | |
143 | ProcessorNumber, | |
144 | Msr, | |
145 | MSR_IA32_MC0_CTL + BankIndex * 4, | |
146 | MAX_UINT64 | |
147 | ); | |
148 | } | |
149 | ||
150 | if (PcdGetBool (PcdIsPowerOnReset)) { | |
151 | for (BankIndex = 0; BankIndex < (UINTN) McgCap.Bits.Count; BankIndex++) { | |
152 | CPU_REGISTER_TABLE_WRITE64 ( | |
153 | ProcessorNumber, | |
154 | Msr, | |
155 | MSR_IA32_MC0_STATUS + BankIndex * 4, | |
156 | 0 | |
157 | ); | |
158 | } | |
159 | } | |
160 | ||
161 | return RETURN_SUCCESS; | |
162 | } | |
163 | ||
164 | /** | |
165 | Detects if IA32_MCG_CTL feature supported on current processor. | |
166 | ||
167 | @param[in] ProcessorNumber The index of the CPU executing this function. | |
168 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION | |
169 | structure for the CPU executing this function. | |
170 | @param[in] ConfigData A pointer to the configuration buffer returned | |
171 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if | |
172 | CPU_FEATURE_GET_CONFIG_DATA was not provided in | |
173 | RegisterCpuFeature(). | |
174 | ||
175 | @retval TRUE IA32_MCG_CTL feature is supported. | |
176 | @retval FALSE IA32_MCG_CTL feature is not supported. | |
177 | ||
178 | @note This service could be called by BSP/APs. | |
179 | **/ | |
180 | BOOLEAN | |
181 | EFIAPI | |
182 | McgCtlSupport ( | |
183 | IN UINTN ProcessorNumber, | |
184 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, | |
185 | IN VOID *ConfigData OPTIONAL | |
186 | ) | |
187 | { | |
188 | MSR_IA32_MCG_CAP_REGISTER McgCap; | |
189 | ||
190 | if (!McaSupport (ProcessorNumber, CpuInfo, ConfigData)) { | |
191 | return FALSE; | |
192 | } | |
193 | McgCap.Uint64 = AsmReadMsr64 (MSR_IA32_MCG_CAP); | |
194 | return (McgCap.Bits.MCG_CTL_P == 1); | |
195 | } | |
196 | ||
197 | /** | |
198 | Initializes IA32_MCG_CTL feature to specific state. | |
199 | ||
200 | @param[in] ProcessorNumber The index of the CPU executing this function. | |
201 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION | |
202 | structure for the CPU executing this function. | |
203 | @param[in] ConfigData A pointer to the configuration buffer returned | |
204 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if | |
205 | CPU_FEATURE_GET_CONFIG_DATA was not provided in | |
206 | RegisterCpuFeature(). | |
207 | @param[in] State If TRUE, then the IA32_MCG_CTL feature must be enabled. | |
208 | If FALSE, then the IA32_MCG_CTL feature must be disabled. | |
209 | ||
210 | @retval RETURN_SUCCESS IA32_MCG_CTL feature is initialized. | |
211 | ||
212 | @note This service could be called by BSP only. | |
213 | **/ | |
214 | RETURN_STATUS | |
215 | EFIAPI | |
216 | McgCtlInitialize ( | |
217 | IN UINTN ProcessorNumber, | |
218 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, | |
219 | IN VOID *ConfigData, OPTIONAL | |
220 | IN BOOLEAN State | |
221 | ) | |
222 | { | |
223 | CPU_REGISTER_TABLE_WRITE64 ( | |
224 | ProcessorNumber, | |
225 | Msr, | |
226 | MSR_IA32_MCG_CTL, | |
227 | (State)? MAX_UINT64 : 0 | |
228 | ); | |
229 | return RETURN_SUCCESS; | |
230 | } | |
231 |