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1 | /** @file\r |
2 | This is the driver that publishes the SMM Access Ppi\r | |
3 | instance for the Quark SOC.\r | |
4 | \r | |
5 | Copyright (c) 2013-2015 Intel Corporation.\r | |
6 | \r | |
7 | This program and the accompanying materials\r | |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | #include <PiPei.h>\r | |
17 | #include <Ppi/SmmAccess.h>\r | |
18 | #include <Guid/SmramMemoryReserve.h>\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
20 | #include <Library/MemoryAllocationLib.h>\r | |
21 | #include <Library/DebugLib.h>\r | |
22 | #include <Library/HobLib.h>\r | |
23 | #include <Library/PciLib.h>\r | |
24 | #include <Library/PeiServicesLib.h>\r | |
25 | #include <Library/QNCSmmLib.h>\r | |
26 | #include <QNCAccess.h>\r | |
27 | \r | |
28 | #define SMM_ACCESS_PRIVATE_DATA_FROM_THIS(a) \\r | |
29 | CR ( \\r | |
30 | a, \\r | |
31 | SMM_ACCESS_PRIVATE_DATA, \\r | |
32 | SmmAccess, \\r | |
33 | SMM_ACCESS_PRIVATE_DATA_SIGNATURE \\r | |
34 | )\r | |
35 | \r | |
36 | #define MAX_CPU_SOCKET 1\r | |
37 | #define MAX_SMRAM_RANGES 4\r | |
38 | \r | |
39 | typedef struct {\r | |
40 | UINTN Signature;\r | |
41 | EFI_HANDLE Handle;\r | |
42 | PEI_SMM_ACCESS_PPI SmmAccess;\r | |
43 | UINTN NumberRegions;\r | |
44 | EFI_SMRAM_DESCRIPTOR SmramDesc[MAX_SMRAM_RANGES];\r | |
45 | UINT8 TsegSize;\r | |
46 | UINT8 MaxBusNumber;\r | |
47 | UINT8 SocketPopulated[MAX_CPU_SOCKET];\r | |
48 | UINT8 SocketBusNum[MAX_CPU_SOCKET];\r | |
49 | } SMM_ACCESS_PRIVATE_DATA;\r | |
50 | \r | |
51 | #define SMM_ACCESS_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('i', 's', 'm', 'a')\r | |
52 | \r | |
53 | \r | |
54 | EFI_STATUS\r | |
55 | EFIAPI\r | |
56 | Open (\r | |
57 | IN EFI_PEI_SERVICES **PeiServices,\r | |
58 | IN PEI_SMM_ACCESS_PPI *This,\r | |
59 | IN UINTN DescriptorIndex\r | |
60 | )\r | |
61 | /*++\r | |
62 | \r | |
63 | Routine Description:\r | |
64 | \r | |
65 | This routine accepts a request to "open" a region of SMRAM. The\r | |
66 | region could be legacy ABSEG, HSEG, or TSEG near top of physical memory.\r | |
67 | The use of "open" means that the memory is visible from all PEIM\r | |
68 | and SMM agents.\r | |
69 | \r | |
70 | Arguments:\r | |
71 | \r | |
72 | PeiServices - General purpose services available to every PEIM.\r | |
73 | This - Pointer to the SMM Access Interface.\r | |
74 | DescriptorIndex - Region of SMRAM to Open.\r | |
75 | \r | |
76 | Returns:\r | |
77 | \r | |
78 | EFI_SUCCESS - The region was successfully opened.\r | |
79 | EFI_DEVICE_ERROR - The region could not be opened because locked by\r | |
80 | chipset.\r | |
81 | EFI_INVALID_PARAMETER - The descriptor index was out of bounds.\r | |
82 | \r | |
83 | --*/\r | |
84 | {\r | |
85 | SMM_ACCESS_PRIVATE_DATA *SmmAccess;\r | |
86 | \r | |
87 | SmmAccess = SMM_ACCESS_PRIVATE_DATA_FROM_THIS (This);\r | |
88 | \r | |
89 | if (DescriptorIndex >= SmmAccess->NumberRegions) {\r | |
90 | return EFI_INVALID_PARAMETER;\r | |
91 | } else if (SmmAccess->SmramDesc[DescriptorIndex].RegionState & EFI_SMRAM_LOCKED) {\r | |
92 | return EFI_DEVICE_ERROR;\r | |
93 | }\r | |
94 | \r | |
95 | //\r | |
96 | // Open TSEG\r | |
97 | //\r | |
98 | if (!QNCOpenSmramRegion ()) {\r | |
99 | SmmAccess->SmramDesc[DescriptorIndex].RegionState |= EFI_SMRAM_LOCKED;\r | |
100 | return EFI_DEVICE_ERROR;\r | |
101 | }\r | |
102 | \r | |
103 | SmmAccess->SmramDesc[DescriptorIndex].RegionState &= ~(EFI_SMRAM_CLOSED | EFI_ALLOCATED);\r | |
104 | SmmAccess->SmramDesc[DescriptorIndex].RegionState |= EFI_SMRAM_OPEN;\r | |
105 | SmmAccess->SmmAccess.OpenState = TRUE;\r | |
106 | \r | |
107 | return EFI_SUCCESS;\r | |
108 | }\r | |
109 | \r | |
110 | EFI_STATUS\r | |
111 | EFIAPI\r | |
112 | Close (\r | |
113 | IN EFI_PEI_SERVICES **PeiServices,\r | |
114 | IN PEI_SMM_ACCESS_PPI *This,\r | |
115 | IN UINTN DescriptorIndex\r | |
116 | )\r | |
117 | /*++\r | |
118 | \r | |
119 | Routine Description:\r | |
120 | \r | |
121 | This routine accepts a request to "close" a region of SMRAM. This is valid for\r | |
122 | compatible SMRAM region.\r | |
123 | \r | |
124 | Arguments:\r | |
125 | \r | |
126 | PeiServices - General purpose services available to every PEIM.\r | |
127 | This - Pointer to the SMM Access Interface.\r | |
128 | DescriptorIndex - Region of SMRAM to Close.\r | |
129 | \r | |
130 | Returns:\r | |
131 | \r | |
132 | EFI_SUCCESS - The region was successfully closed.\r | |
133 | EFI_DEVICE_ERROR - The region could not be closed because locked by\r | |
134 | chipset.\r | |
135 | EFI_INVALID_PARAMETER - The descriptor index was out of bounds.\r | |
136 | \r | |
137 | --*/\r | |
138 | {\r | |
139 | SMM_ACCESS_PRIVATE_DATA *SmmAccess;\r | |
140 | BOOLEAN OpenState;\r | |
141 | UINTN Index;\r | |
142 | \r | |
143 | \r | |
144 | SmmAccess = SMM_ACCESS_PRIVATE_DATA_FROM_THIS (This);\r | |
145 | \r | |
146 | if (DescriptorIndex >= SmmAccess->NumberRegions) {\r | |
147 | return EFI_INVALID_PARAMETER;\r | |
148 | } else if (SmmAccess->SmramDesc[DescriptorIndex].RegionState & EFI_SMRAM_LOCKED) {\r | |
149 | return EFI_DEVICE_ERROR;\r | |
150 | }\r | |
151 | \r | |
152 | if (SmmAccess->SmramDesc[DescriptorIndex].RegionState & EFI_SMRAM_CLOSED) {\r | |
153 | return EFI_DEVICE_ERROR;\r | |
154 | }\r | |
155 | \r | |
156 | //\r | |
157 | // Close TSEG\r | |
158 | //\r | |
159 | if (!QNCCloseSmramRegion ()) {\r | |
160 | SmmAccess->SmramDesc[DescriptorIndex].RegionState |= EFI_SMRAM_LOCKED;\r | |
161 | return EFI_DEVICE_ERROR;\r | |
162 | }\r | |
163 | \r | |
164 | SmmAccess->SmramDesc[DescriptorIndex].RegionState &= ~EFI_SMRAM_OPEN;\r | |
165 | SmmAccess->SmramDesc[DescriptorIndex].RegionState |= (EFI_SMRAM_CLOSED | EFI_ALLOCATED);\r | |
166 | \r | |
167 | //\r | |
168 | // Find out if any regions are still open\r | |
169 | //\r | |
170 | OpenState = FALSE;\r | |
171 | for (Index = 0; Index < SmmAccess->NumberRegions; Index++) {\r | |
172 | if ((SmmAccess->SmramDesc[Index].RegionState & EFI_SMRAM_OPEN) == EFI_SMRAM_OPEN) {\r | |
173 | OpenState = TRUE;\r | |
174 | }\r | |
175 | }\r | |
176 | \r | |
177 | SmmAccess->SmmAccess.OpenState = OpenState;\r | |
178 | \r | |
179 | return EFI_SUCCESS;\r | |
180 | }\r | |
181 | \r | |
182 | EFI_STATUS\r | |
183 | EFIAPI\r | |
184 | Lock (\r | |
185 | IN EFI_PEI_SERVICES **PeiServices,\r | |
186 | IN PEI_SMM_ACCESS_PPI *This,\r | |
187 | IN UINTN DescriptorIndex\r | |
188 | )\r | |
189 | /*++\r | |
190 | \r | |
191 | Routine Description:\r | |
192 | \r | |
193 | This routine accepts a request to "lock" SMRAM. The\r | |
194 | region could be legacy AB or TSEG near top of physical memory.\r | |
195 | The use of "lock" means that the memory can no longer be opened\r | |
196 | to PEIM.\r | |
197 | \r | |
198 | Arguments:\r | |
199 | \r | |
200 | PeiServices - General purpose services available to every PEIM.\r | |
201 | This - Pointer to the SMM Access Interface.\r | |
202 | DescriptorIndex - Region of SMRAM to Lock.\r | |
203 | \r | |
204 | Returns:\r | |
205 | \r | |
206 | EFI_SUCCESS - The region was successfully locked.\r | |
207 | EFI_DEVICE_ERROR - The region could not be locked because at least\r | |
208 | one range is still open.\r | |
209 | EFI_INVALID_PARAMETER - The descriptor index was out of bounds.\r | |
210 | \r | |
211 | --*/\r | |
212 | {\r | |
213 | SMM_ACCESS_PRIVATE_DATA *SmmAccess;\r | |
214 | \r | |
215 | SmmAccess = SMM_ACCESS_PRIVATE_DATA_FROM_THIS (This);\r | |
216 | \r | |
217 | if (DescriptorIndex >= SmmAccess->NumberRegions) {\r | |
218 | return EFI_INVALID_PARAMETER;\r | |
219 | } else if (SmmAccess->SmmAccess.OpenState) {\r | |
220 | return EFI_DEVICE_ERROR;\r | |
221 | }\r | |
222 | \r | |
223 | SmmAccess->SmramDesc[DescriptorIndex].RegionState |= EFI_SMRAM_LOCKED;\r | |
224 | SmmAccess->SmmAccess.LockState = TRUE;\r | |
225 | \r | |
226 | //\r | |
227 | // Lock TSEG\r | |
228 | //\r | |
229 | QNCLockSmramRegion ();\r | |
230 | \r | |
231 | return EFI_SUCCESS;\r | |
232 | }\r | |
233 | \r | |
234 | EFI_STATUS\r | |
235 | EFIAPI\r | |
236 | GetCapabilities (\r | |
237 | IN EFI_PEI_SERVICES **PeiServices,\r | |
238 | IN PEI_SMM_ACCESS_PPI *This,\r | |
239 | IN OUT UINTN *SmramMapSize,\r | |
240 | IN OUT EFI_SMRAM_DESCRIPTOR *SmramMap\r | |
241 | )\r | |
242 | /*++\r | |
243 | \r | |
244 | Routine Description:\r | |
245 | \r | |
246 | This routine services a user request to discover the SMRAM\r | |
247 | capabilities of this platform. This will report the possible\r | |
248 | ranges that are possible for SMRAM access, based upon the\r | |
249 | memory controller capabilities.\r | |
250 | \r | |
251 | Arguments:\r | |
252 | \r | |
253 | PeiServices - General purpose services available to every PEIM.\r | |
254 | This - Pointer to the SMRAM Access Interface.\r | |
255 | SmramMapSize - Pointer to the variable containing size of the\r | |
256 | buffer to contain the description information.\r | |
257 | SmramMap - Buffer containing the data describing the Smram\r | |
258 | region descriptors.\r | |
259 | Returns:\r | |
260 | \r | |
261 | EFI_BUFFER_TOO_SMALL - The user did not provide a sufficient buffer.\r | |
262 | EFI_SUCCESS - The user provided a sufficiently-sized buffer.\r | |
263 | \r | |
264 | --*/\r | |
265 | {\r | |
266 | EFI_STATUS Status;\r | |
267 | SMM_ACCESS_PRIVATE_DATA *SmmAccess;\r | |
268 | UINTN BufferSize;\r | |
269 | \r | |
270 | SmmAccess = SMM_ACCESS_PRIVATE_DATA_FROM_THIS (This);\r | |
271 | BufferSize = SmmAccess->NumberRegions * sizeof (EFI_SMRAM_DESCRIPTOR);\r | |
272 | \r | |
273 | if (*SmramMapSize < BufferSize) {\r | |
274 | Status = EFI_BUFFER_TOO_SMALL;\r | |
275 | } else {\r | |
276 | CopyMem (SmramMap, SmmAccess->SmramDesc, *SmramMapSize);\r | |
277 | Status = EFI_SUCCESS;\r | |
278 | }\r | |
279 | \r | |
280 | *SmramMapSize = BufferSize;\r | |
281 | \r | |
282 | return Status;\r | |
283 | }\r | |
284 | \r | |
285 | \r | |
286 | EFI_STATUS\r | |
287 | EFIAPI\r | |
288 | SmmAccessPeiEntryPoint (\r | |
289 | IN EFI_PEI_FILE_HANDLE FileHandle,\r | |
290 | IN CONST EFI_PEI_SERVICES **PeiServices\r | |
291 | )\r | |
292 | /*++\r | |
293 | \r | |
294 | Routine Description:\r | |
295 | \r | |
296 | This is the constructor for the SMM Access Ppi\r | |
297 | \r | |
298 | Arguments:\r | |
299 | \r | |
300 | FfsHeader - FfsHeader.\r | |
301 | PeiServices - General purpose services available to every PEIM.\r | |
302 | \r | |
303 | Returns:\r | |
304 | \r | |
305 | EFI_SUCCESS - Protocol successfully started and installed.\r | |
306 | EFI_UNSUPPORTED - Protocol can't be started.\r | |
307 | --*/\r | |
308 | {\r | |
309 | \r | |
310 | EFI_STATUS Status;\r | |
311 | UINTN Index;\r | |
312 | EFI_SMRAM_HOB_DESCRIPTOR_BLOCK *DescriptorBlock;\r | |
313 | SMM_ACCESS_PRIVATE_DATA *SmmAccessPrivate;\r | |
314 | EFI_PEI_PPI_DESCRIPTOR *PpiList;\r | |
315 | EFI_HOB_GUID_TYPE *GuidHob;\r | |
316 | \r | |
317 | //\r | |
318 | // Initialize private data\r | |
319 | //\r | |
320 | SmmAccessPrivate = AllocatePool (sizeof(*SmmAccessPrivate));\r | |
321 | ASSERT(SmmAccessPrivate);\r | |
322 | \r | |
323 | PpiList = AllocatePool (sizeof(*PpiList));\r | |
324 | ASSERT (PpiList);\r | |
325 | \r | |
326 | //\r | |
327 | // Build SMM related information\r | |
328 | //\r | |
329 | SmmAccessPrivate->Signature = SMM_ACCESS_PRIVATE_DATA_SIGNATURE;\r | |
330 | \r | |
331 | //\r | |
332 | // Get Hob list\r | |
333 | //\r | |
334 | GuidHob = GetFirstGuidHob (&gEfiSmmPeiSmramMemoryReserveGuid);\r | |
335 | DescriptorBlock = GET_GUID_HOB_DATA (GuidHob);\r | |
336 | ASSERT (DescriptorBlock);\r | |
337 | \r | |
338 | // Get CPU Max bus number\r | |
339 | \r | |
340 | SmmAccessPrivate->MaxBusNumber = PCI_BUS_NUMBER_QNC;\r | |
341 | for (Index = 0; Index < MAX_CPU_SOCKET; Index++) {\r | |
342 | SmmAccessPrivate->SocketPopulated[Index] = TRUE;\r | |
343 | SmmAccessPrivate->SocketBusNum[Index] = PCI_BUS_NUMBER_QNC;\r | |
344 | }\r | |
345 | \r | |
346 | //\r | |
347 | // Use the hob to publish SMRAM capabilities\r | |
348 | //\r | |
349 | ASSERT (DescriptorBlock->NumberOfSmmReservedRegions <= MAX_SMRAM_RANGES);\r | |
350 | for (Index = 0; Index < DescriptorBlock->NumberOfSmmReservedRegions; Index++) {\r | |
351 | SmmAccessPrivate->SmramDesc[Index].PhysicalStart = DescriptorBlock->Descriptor[Index].PhysicalStart;\r | |
352 | SmmAccessPrivate->SmramDesc[Index].CpuStart = DescriptorBlock->Descriptor[Index].CpuStart;\r | |
353 | SmmAccessPrivate->SmramDesc[Index].PhysicalSize = DescriptorBlock->Descriptor[Index].PhysicalSize;\r | |
354 | SmmAccessPrivate->SmramDesc[Index].RegionState = DescriptorBlock->Descriptor[Index].RegionState;\r | |
355 | }\r | |
356 | \r | |
357 | SmmAccessPrivate->NumberRegions = Index;\r | |
358 | SmmAccessPrivate->SmmAccess.Open = Open;\r | |
359 | SmmAccessPrivate->SmmAccess.Close = Close;\r | |
360 | SmmAccessPrivate->SmmAccess.Lock = Lock;\r | |
361 | SmmAccessPrivate->SmmAccess.GetCapabilities = GetCapabilities;\r | |
362 | SmmAccessPrivate->SmmAccess.LockState = FALSE;\r | |
363 | SmmAccessPrivate->SmmAccess.OpenState = FALSE;\r | |
364 | \r | |
365 | PpiList->Flags = (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST);\r | |
366 | PpiList->Guid = &gPeiSmmAccessPpiGuid;\r | |
367 | PpiList->Ppi = &SmmAccessPrivate->SmmAccess;\r | |
368 | \r | |
369 | Status = (**PeiServices).InstallPpi (PeiServices, PpiList);\r | |
370 | ASSERT_EFI_ERROR(Status);\r | |
371 | \r | |
372 | DEBUG (\r | |
373 | (EFI_D_INFO, "SMM Base:Size %08X:%08X\n",\r | |
374 | (UINTN)(SmmAccessPrivate->SmramDesc[SmmAccessPrivate->NumberRegions-1].PhysicalStart),\r | |
375 | (UINTN)(SmmAccessPrivate->SmramDesc[SmmAccessPrivate->NumberRegions-1].PhysicalSize)\r | |
376 | ));\r | |
377 | \r | |
378 | SmmAccessPrivate->TsegSize = (UINT8)(SmmAccessPrivate->SmramDesc[SmmAccessPrivate->NumberRegions-1].PhysicalSize);\r | |
379 | \r | |
380 | return EFI_SUCCESS;\r | |
381 | }\r | |
382 | \r |