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1 | /** @file\r |
2 | CPU Register Table Library functions.\r | |
3 | \r | |
4 | Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include <PiPei.h>\r | |
16 | \r | |
17 | #include <Library/HobLib.h>\r | |
18 | #include <Library/PeiServicesLib.h>\r | |
19 | #include <Library/PeiServicesTablePointerLib.h>\r | |
20 | #include <Ppi/MpServices.h>\r | |
21 | #include "RegisterCpuFeatures.h"\r | |
22 | \r | |
23 | #define REGISTER_CPU_FEATURES_GUID \\r | |
24 | { \\r | |
25 | 0xa694c467, 0x697a, 0x446b, { 0xb9, 0x29, 0x5b, 0x14, 0xa0, 0xcf, 0x39, 0xf } \\r | |
26 | }\r | |
27 | \r | |
28 | EFI_GUID mRegisterCpuFeaturesHobGuid = REGISTER_CPU_FEATURES_GUID;\r | |
29 | \r | |
30 | /**\r | |
31 | Worker function to get CPU_FEATURES_DATA pointer.\r | |
32 | \r | |
33 | @return Pointer to CPU_FEATURES_DATA.\r | |
34 | **/\r | |
35 | CPU_FEATURES_DATA *\r | |
36 | GetCpuFeaturesData (\r | |
37 | VOID\r | |
38 | )\r | |
39 | {\r | |
40 | CPU_FEATURES_DATA *CpuInitData;\r | |
41 | EFI_HOB_GUID_TYPE *GuidHob;\r | |
42 | VOID *DataInHob;\r | |
43 | UINT64 Data64;\r | |
44 | \r | |
45 | CpuInitData = NULL;\r | |
46 | GuidHob = GetFirstGuidHob (&mRegisterCpuFeaturesHobGuid);\r | |
47 | if (GuidHob != NULL) {\r | |
48 | DataInHob = GET_GUID_HOB_DATA (GuidHob);\r | |
49 | CpuInitData = (CPU_FEATURES_DATA *) (*(UINTN *) DataInHob);\r | |
50 | ASSERT (CpuInitData != NULL);\r | |
51 | } else {\r | |
52 | CpuInitData = AllocateZeroPool (sizeof (CPU_FEATURES_DATA));\r | |
53 | ASSERT (CpuInitData != NULL);\r | |
54 | //\r | |
55 | // Build location of CPU MP DATA buffer in HOB\r | |
56 | //\r | |
57 | Data64 = (UINT64) (UINTN) CpuInitData;\r | |
58 | BuildGuidDataHob (\r | |
59 | &mRegisterCpuFeaturesHobGuid,\r | |
60 | (VOID *) &Data64,\r | |
61 | sizeof (UINT64)\r | |
62 | );\r | |
63 | }\r | |
64 | \r | |
65 | return CpuInitData;\r | |
66 | }\r | |
67 | \r | |
68 | /**\r | |
69 | Worker function to get MP PPI service pointer.\r | |
70 | \r | |
71 | @return PEI PPI service pointer.\r | |
72 | **/\r | |
73 | EFI_PEI_MP_SERVICES_PPI *\r | |
74 | GetMpPpi (\r | |
75 | VOID\r | |
76 | )\r | |
77 | {\r | |
78 | EFI_STATUS Status;\r | |
79 | EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;\r | |
80 | \r | |
81 | //\r | |
82 | // Get MP Services Protocol\r | |
83 | //\r | |
84 | Status = PeiServicesLocatePpi (\r | |
85 | &gEfiPeiMpServicesPpiGuid,\r | |
86 | 0,\r | |
87 | NULL,\r | |
88 | (VOID **)&CpuMpPpi\r | |
89 | );\r | |
90 | ASSERT_EFI_ERROR (Status);\r | |
91 | return CpuMpPpi;\r | |
92 | }\r | |
93 | \r | |
94 | /**\r | |
95 | Worker function to return processor index.\r | |
96 | \r | |
97 | @return The processor index.\r | |
98 | **/\r | |
99 | UINTN\r | |
100 | GetProcessorIndex (\r | |
101 | VOID\r | |
102 | )\r | |
103 | {\r | |
104 | EFI_STATUS Status;\r | |
105 | EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;\r | |
106 | UINTN ProcessorIndex;\r | |
107 | \r | |
108 | CpuMpPpi = GetMpPpi ();\r | |
109 | \r | |
110 | Status = CpuMpPpi->WhoAmI(GetPeiServicesTablePointer (), CpuMpPpi, &ProcessorIndex);\r | |
111 | ASSERT_EFI_ERROR (Status);\r | |
112 | return ProcessorIndex;\r | |
113 | }\r | |
114 | \r | |
115 | /**\r | |
116 | Worker function to MP-related information on the requested processor at the\r | |
117 | instant this call is made.\r | |
118 | \r | |
119 | @param[in] ProcessorNumber The handle number of processor.\r | |
120 | @param[out] ProcessorInfoBuffer A pointer to the buffer where information for\r | |
121 | the requested processor is deposited.\r | |
122 | \r | |
123 | @return Status of MpServices->GetProcessorInfo().\r | |
124 | **/\r | |
125 | EFI_STATUS\r | |
126 | GetProcessorInformation (\r | |
127 | IN UINTN ProcessorNumber,\r | |
128 | OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer\r | |
129 | )\r | |
130 | {\r | |
131 | EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;\r | |
132 | EFI_STATUS Status;\r | |
133 | \r | |
134 | CpuMpPpi = GetMpPpi ();\r | |
135 | Status = CpuMpPpi->GetProcessorInfo (\r | |
136 | GetPeiServicesTablePointer(),\r | |
137 | CpuMpPpi,\r | |
138 | ProcessorNumber,\r | |
139 | ProcessorInfoBuffer\r | |
140 | );\r | |
141 | return Status;\r | |
142 | }\r | |
143 | \r | |
144 | /**\r | |
145 | Worker function to execute a caller provided function on all enabled APs.\r | |
146 | \r | |
147 | @param[in] Procedure A pointer to the function to be run on\r | |
148 | enabled APs of the system.\r | |
149 | **/\r | |
150 | VOID\r | |
151 | StartupAPsWorker (\r | |
b3c71b47 ED |
152 | IN EFI_AP_PROCEDURE Procedure,\r |
153 | IN EFI_EVENT MpEvent\r | |
80c4b236 JF |
154 | )\r |
155 | {\r | |
156 | EFI_STATUS Status;\r | |
157 | EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;\r | |
b3c71b47 ED |
158 | CPU_FEATURES_DATA *CpuFeaturesData;\r |
159 | \r | |
160 | CpuFeaturesData = GetCpuFeaturesData ();\r | |
80c4b236 JF |
161 | \r |
162 | //\r | |
163 | // Get MP Services Protocol\r | |
164 | //\r | |
165 | Status = PeiServicesLocatePpi (\r | |
166 | &gEfiPeiMpServicesPpiGuid,\r | |
167 | 0,\r | |
168 | NULL,\r | |
169 | (VOID **)&CpuMpPpi\r | |
170 | );\r | |
171 | ASSERT_EFI_ERROR (Status);\r | |
172 | \r | |
173 | //\r | |
174 | // Wakeup all APs for data collection.\r | |
175 | //\r | |
176 | Status = CpuMpPpi->StartupAllAPs (\r | |
177 | GetPeiServicesTablePointer (),\r | |
178 | CpuMpPpi,\r | |
179 | Procedure,\r | |
180 | FALSE,\r | |
181 | 0,\r | |
b3c71b47 | 182 | CpuFeaturesData\r |
80c4b236 JF |
183 | );\r |
184 | ASSERT_EFI_ERROR (Status);\r | |
185 | }\r | |
186 | \r | |
187 | /**\r | |
188 | Worker function to switch the requested AP to be the BSP from that point onward.\r | |
189 | \r | |
190 | @param[in] ProcessorNumber The handle number of AP that is to become the new BSP.\r | |
191 | **/\r | |
192 | VOID\r | |
193 | SwitchNewBsp (\r | |
194 | IN UINTN ProcessorNumber\r | |
195 | )\r | |
196 | {\r | |
197 | EFI_STATUS Status;\r | |
198 | EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;\r | |
199 | \r | |
200 | //\r | |
201 | // Get MP Services Protocol\r | |
202 | //\r | |
203 | Status = PeiServicesLocatePpi (\r | |
204 | &gEfiPeiMpServicesPpiGuid,\r | |
205 | 0,\r | |
206 | NULL,\r | |
207 | (VOID **)&CpuMpPpi\r | |
208 | );\r | |
209 | ASSERT_EFI_ERROR (Status);\r | |
210 | \r | |
211 | //\r | |
212 | // Wakeup all APs for data collection.\r | |
213 | //\r | |
214 | Status = CpuMpPpi->SwitchBSP (\r | |
215 | GetPeiServicesTablePointer (),\r | |
216 | CpuMpPpi,\r | |
217 | ProcessorNumber,\r | |
218 | TRUE\r | |
219 | );\r | |
220 | ASSERT_EFI_ERROR (Status);\r | |
221 | }\r | |
222 | \r | |
223 | /**\r | |
224 | Worker function to retrieve the number of logical processor in the platform.\r | |
225 | \r | |
226 | @param[out] NumberOfCpus Pointer to the total number of logical\r | |
227 | processors in the system, including the BSP\r | |
228 | and disabled APs.\r | |
229 | @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical\r | |
230 | processors that exist in system, including\r | |
231 | the BSP.\r | |
232 | **/\r | |
233 | VOID\r | |
234 | GetNumberOfProcessor (\r | |
235 | OUT UINTN *NumberOfCpus,\r | |
236 | OUT UINTN *NumberOfEnabledProcessors\r | |
237 | )\r | |
238 | {\r | |
239 | EFI_STATUS Status;\r | |
240 | EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;\r | |
241 | \r | |
242 | //\r | |
243 | // Get MP Services Protocol\r | |
244 | //\r | |
245 | Status = PeiServicesLocatePpi (\r | |
246 | &gEfiPeiMpServicesPpiGuid,\r | |
247 | 0,\r | |
248 | NULL,\r | |
249 | (VOID **)&CpuMpPpi\r | |
250 | );\r | |
251 | ASSERT_EFI_ERROR (Status);\r | |
252 | \r | |
253 | //\r | |
254 | // Get the number of CPUs\r | |
255 | //\r | |
256 | Status = CpuMpPpi->GetNumberOfProcessors (\r | |
257 | GetPeiServicesTablePointer (),\r | |
258 | CpuMpPpi,\r | |
259 | NumberOfCpus,\r | |
260 | NumberOfEnabledProcessors\r | |
261 | );\r | |
262 | ASSERT_EFI_ERROR (Status);\r | |
263 | }\r | |
b3c71b47 ED |
264 | \r |
265 | /**\r | |
266 | Performs CPU features Initialization.\r | |
267 | \r | |
268 | This service will invoke MP service to perform CPU features\r | |
269 | initialization on BSP/APs per user configuration.\r | |
270 | \r | |
271 | @note This service could be called by BSP only.\r | |
272 | **/\r | |
273 | VOID\r | |
274 | EFIAPI\r | |
275 | CpuFeaturesInitialize (\r | |
276 | VOID\r | |
277 | )\r | |
278 | {\r | |
279 | CPU_FEATURES_DATA *CpuFeaturesData;\r | |
280 | UINTN OldBspNumber;\r | |
281 | \r | |
282 | CpuFeaturesData = GetCpuFeaturesData ();\r | |
283 | \r | |
284 | OldBspNumber = GetProcessorIndex();\r | |
285 | CpuFeaturesData->BspNumber = OldBspNumber;\r | |
286 | \r | |
287 | //\r | |
288 | // Known limitation: In PEI phase, CpuFeatures driver not\r | |
289 | // support async mode execute tasks. So semaphore type\r | |
290 | // register can't been used for this instance, must use\r | |
291 | // DXE type instance.\r | |
292 | //\r | |
293 | \r | |
294 | //\r | |
295 | // Wakeup all APs for programming.\r | |
296 | //\r | |
297 | StartupAPsWorker (SetProcessorRegister, NULL);\r | |
298 | //\r | |
299 | // Programming BSP\r | |
300 | //\r | |
301 | SetProcessorRegister (CpuFeaturesData);\r | |
302 | \r | |
303 | //\r | |
304 | // Switch to new BSP if required\r | |
305 | //\r | |
306 | if (CpuFeaturesData->BspNumber != OldBspNumber) {\r | |
307 | SwitchNewBsp (CpuFeaturesData->BspNumber);\r | |
308 | }\r | |
309 | }\r | |
310 | \r |