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1 | /** @file\r | |
2 | OVMF ACPI Xen support\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>\r | |
5 | Copyright (c) 2012, Bei Guan <gbtju85@gmail.com>\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 | \r | |
17 | #include "AcpiPlatform.h"\r | |
18 | #include <Library/HobLib.h>\r | |
19 | #include <Guid/XenInfo.h>\r | |
20 | #include <Library/BaseLib.h>\r | |
21 | \r | |
22 | #define XEN_ACPI_PHYSICAL_ADDRESS 0x000EA020\r | |
23 | #define XEN_BIOS_PHYSICAL_END 0x000FFFFF\r | |
24 | \r | |
25 | EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *XenAcpiRsdpStructurePtr = NULL;\r | |
26 | \r | |
27 | /**\r | |
28 | This function detects if OVMF is running on Xen.\r | |
29 | \r | |
30 | **/\r | |
31 | BOOLEAN\r | |
32 | XenDetected (\r | |
33 | VOID\r | |
34 | )\r | |
35 | {\r | |
36 | EFI_HOB_GUID_TYPE *GuidHob;\r | |
37 | \r | |
38 | //\r | |
39 | // See if a XenInfo HOB is available\r | |
40 | //\r | |
41 | GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);\r | |
42 | if (GuidHob == NULL) {\r | |
43 | return FALSE;\r | |
44 | }\r | |
45 | \r | |
46 | return TRUE;\r | |
47 | }\r | |
48 | \r | |
49 | /**\r | |
50 | Get the address of Xen ACPI Root System Description Pointer (RSDP)\r | |
51 | structure.\r | |
52 | \r | |
53 | @param RsdpStructurePtr Return pointer to RSDP structure\r | |
54 | \r | |
55 | @return EFI_SUCCESS Find Xen RSDP structure successfully.\r | |
56 | @return EFI_NOT_FOUND Don't find Xen RSDP structure.\r | |
57 | @return EFI_ABORTED Find Xen RSDP structure, but it's not integrated.\r | |
58 | \r | |
59 | **/\r | |
60 | EFI_STATUS\r | |
61 | EFIAPI\r | |
62 | GetXenAcpiRsdp (\r | |
63 | OUT EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER **RsdpPtr\r | |
64 | )\r | |
65 | {\r | |
66 | EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr;\r | |
67 | UINT8 *XenAcpiPtr;\r | |
68 | UINT8 Sum;\r | |
69 | \r | |
70 | //\r | |
71 | // Detect the RSDP structure\r | |
72 | //\r | |
73 | for (XenAcpiPtr = (UINT8*)(UINTN) XEN_ACPI_PHYSICAL_ADDRESS;\r | |
74 | XenAcpiPtr < (UINT8*)(UINTN) XEN_BIOS_PHYSICAL_END;\r | |
75 | XenAcpiPtr += 0x10) {\r | |
76 | \r | |
77 | RsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)\r | |
78 | (UINTN) XenAcpiPtr;\r | |
79 | \r | |
80 | if (!AsciiStrnCmp ((CHAR8 *) &RsdpStructurePtr->Signature, "RSD PTR ", 8)) {\r | |
81 | //\r | |
82 | // RSDP ACPI 1.0 checksum for 1.0/2.0/3.0 table.\r | |
83 | // This is only the first 20 bytes of the structure\r | |
84 | //\r | |
85 | Sum = CalculateSum8 (\r | |
86 | (CONST UINT8 *)RsdpStructurePtr,\r | |
87 | sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER)\r | |
88 | );\r | |
89 | if (Sum != 0) {\r | |
90 | return EFI_ABORTED;\r | |
91 | }\r | |
92 | \r | |
93 | if (RsdpStructurePtr->Revision >= 2) {\r | |
94 | //\r | |
95 | // RSDP ACPI 2.0/3.0 checksum, this is the entire table\r | |
96 | //\r | |
97 | Sum = CalculateSum8 (\r | |
98 | (CONST UINT8 *)RsdpStructurePtr,\r | |
99 | sizeof (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER)\r | |
100 | );\r | |
101 | if (Sum != 0) {\r | |
102 | return EFI_ABORTED;\r | |
103 | }\r | |
104 | }\r | |
105 | *RsdpPtr = RsdpStructurePtr;\r | |
106 | return EFI_SUCCESS;\r | |
107 | }\r | |
108 | }\r | |
109 | \r | |
110 | return EFI_NOT_FOUND;\r | |
111 | }\r | |
112 | \r | |
113 | /**\r | |
114 | Get Xen Acpi tables from the RSDP structure. And installs Xen ACPI tables\r | |
115 | into the RSDT/XSDT using InstallAcpiTable. Some signature of the installed\r | |
116 | ACPI tables are: FACP, APIC, HPET, WAET, SSDT, FACS, DSDT.\r | |
117 | \r | |
118 | @param AcpiProtocol Protocol instance pointer.\r | |
119 | \r | |
120 | @return EFI_SUCCESS The table was successfully inserted.\r | |
121 | @return EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL, TableHandle is\r | |
122 | NULL, or AcpiTableBufferSize and the size\r | |
123 | field embedded in the ACPI table pointed to\r | |
124 | by AcpiTableBuffer are not in sync.\r | |
125 | @return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete the request.\r | |
126 | \r | |
127 | **/\r | |
128 | EFI_STATUS\r | |
129 | EFIAPI\r | |
130 | InstallXenTables (\r | |
131 | IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol\r | |
132 | )\r | |
133 | {\r | |
134 | EFI_STATUS Status;\r | |
135 | UINTN TableHandle;\r | |
136 | \r | |
137 | EFI_ACPI_DESCRIPTION_HEADER *Rsdt;\r | |
138 | EFI_ACPI_DESCRIPTION_HEADER *Xsdt;\r | |
139 | VOID *CurrentTableEntry;\r | |
140 | UINTN CurrentTablePointer;\r | |
141 | EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;\r | |
142 | UINTN Index;\r | |
143 | UINTN NumberOfTableEntries;\r | |
144 | EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt2Table;\r | |
145 | EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt1Table;\r | |
146 | EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs2Table;\r | |
147 | EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs1Table;\r | |
148 | EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;\r | |
149 | \r | |
150 | Fadt2Table = NULL;\r | |
151 | Fadt1Table = NULL;\r | |
152 | Facs2Table = NULL;\r | |
153 | Facs1Table = NULL;\r | |
154 | DsdtTable = NULL;\r | |
155 | TableHandle = 0;\r | |
156 | NumberOfTableEntries = 0;\r | |
157 | \r | |
158 | //\r | |
159 | // Try to find Xen ACPI tables\r | |
160 | //\r | |
161 | Status = GetXenAcpiRsdp (&XenAcpiRsdpStructurePtr);\r | |
162 | if (EFI_ERROR (Status)) {\r | |
163 | return Status;\r | |
164 | }\r | |
165 | \r | |
166 | //\r | |
167 | // If XSDT table is find, just install its tables. \r | |
168 | // Otherwise, try to find and install the RSDT tables.\r | |
169 | //\r | |
170 | if (XenAcpiRsdpStructurePtr->XsdtAddress) {\r | |
171 | //\r | |
172 | // Retrieve the addresses of XSDT and \r | |
173 | // calculate the number of its table entries.\r | |
174 | //\r | |
175 | Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)\r | |
176 | XenAcpiRsdpStructurePtr->XsdtAddress;\r | |
177 | NumberOfTableEntries = (Xsdt->Length -\r | |
178 | sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /\r | |
179 | sizeof (UINT64);\r | |
180 | \r | |
181 | //\r | |
182 | // Install ACPI tables found in XSDT.\r | |
183 | //\r | |
184 | for (Index = 0; Index < NumberOfTableEntries; Index++) {\r | |
185 | //\r | |
186 | // Get the table entry from XSDT\r | |
187 | //\r | |
188 | CurrentTableEntry = (VOID *) ((UINT8 *) Xsdt +\r | |
189 | sizeof (EFI_ACPI_DESCRIPTION_HEADER) +\r | |
190 | Index * sizeof (UINT64));\r | |
191 | CurrentTablePointer = (UINTN) *(UINT64 *)CurrentTableEntry;\r | |
192 | CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;\r | |
193 | \r | |
194 | //\r | |
195 | // Install the XSDT tables\r | |
196 | //\r | |
197 | Status = InstallAcpiTable (\r | |
198 | AcpiProtocol,\r | |
199 | CurrentTable,\r | |
200 | CurrentTable->Length,\r | |
201 | &TableHandle\r | |
202 | );\r | |
203 | \r | |
204 | if (EFI_ERROR (Status)) {\r | |
205 | return Status;\r | |
206 | }\r | |
207 | \r | |
208 | //\r | |
209 | // Get the FACS and DSDT table address from the table FADT\r | |
210 | //\r | |
211 | if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {\r | |
212 | Fadt2Table = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)\r | |
213 | (UINTN) CurrentTablePointer;\r | |
214 | Facs2Table = (EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)\r | |
215 | (UINTN) Fadt2Table->FirmwareCtrl;\r | |
216 | DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt2Table->Dsdt;\r | |
217 | }\r | |
218 | }\r | |
219 | }\r | |
220 | else if (XenAcpiRsdpStructurePtr->RsdtAddress) {\r | |
221 | //\r | |
222 | // Retrieve the addresses of RSDT and\r | |
223 | // calculate the number of its table entries.\r | |
224 | //\r | |
225 | Rsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)\r | |
226 | XenAcpiRsdpStructurePtr->RsdtAddress;\r | |
227 | NumberOfTableEntries = (Rsdt->Length -\r | |
228 | sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / \r | |
229 | sizeof (UINT32);\r | |
230 | \r | |
231 | //\r | |
232 | // Install ACPI tables found in XSDT.\r | |
233 | //\r | |
234 | for (Index = 0; Index < NumberOfTableEntries; Index++) {\r | |
235 | //\r | |
236 | // Get the table entry from RSDT\r | |
237 | //\r | |
238 | CurrentTableEntry = (UINT32 *) ((UINT8 *) Rsdt +\r | |
239 | sizeof (EFI_ACPI_DESCRIPTION_HEADER) +\r | |
240 | Index * sizeof (UINT32));\r | |
241 | CurrentTablePointer = *(UINT32 *)CurrentTableEntry;\r | |
242 | CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;\r | |
243 | \r | |
244 | //\r | |
245 | // Install the RSDT tables\r | |
246 | //\r | |
247 | Status = InstallAcpiTable (\r | |
248 | AcpiProtocol,\r | |
249 | CurrentTable,\r | |
250 | CurrentTable->Length,\r | |
251 | &TableHandle\r | |
252 | );\r | |
253 | \r | |
254 | if (EFI_ERROR (Status)) {\r | |
255 | return Status;\r | |
256 | }\r | |
257 | \r | |
258 | //\r | |
259 | // Get the FACS and DSDT table address from the table FADT\r | |
260 | //\r | |
261 | if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {\r | |
262 | Fadt1Table = (EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *)\r | |
263 | (UINTN) CurrentTablePointer;\r | |
264 | Facs1Table = (EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)\r | |
265 | (UINTN) Fadt1Table->FirmwareCtrl;\r | |
266 | DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt1Table->Dsdt;\r | |
267 | }\r | |
268 | }\r | |
269 | }\r | |
270 | \r | |
271 | //\r | |
272 | // Install the FACS table.\r | |
273 | //\r | |
274 | if (Fadt2Table) {\r | |
275 | //\r | |
276 | // FACS 2.0\r | |
277 | //\r | |
278 | Status = InstallAcpiTable (\r | |
279 | AcpiProtocol,\r | |
280 | Facs2Table,\r | |
281 | Facs2Table->Length,\r | |
282 | &TableHandle\r | |
283 | );\r | |
284 | if (EFI_ERROR (Status)) {\r | |
285 | return Status;\r | |
286 | }\r | |
287 | }\r | |
288 | else if (Fadt1Table) {\r | |
289 | //\r | |
290 | // FACS 1.0\r | |
291 | //\r | |
292 | Status = InstallAcpiTable (\r | |
293 | AcpiProtocol,\r | |
294 | Facs1Table,\r | |
295 | Facs1Table->Length,\r | |
296 | &TableHandle\r | |
297 | );\r | |
298 | if (EFI_ERROR (Status)) {\r | |
299 | return Status;\r | |
300 | }\r | |
301 | }\r | |
302 | \r | |
303 | //\r | |
304 | // Install DSDT table.\r | |
305 | //\r | |
306 | Status = InstallAcpiTable (\r | |
307 | AcpiProtocol,\r | |
308 | DsdtTable,\r | |
309 | DsdtTable->Length,\r | |
310 | &TableHandle\r | |
311 | );\r | |
312 | if (EFI_ERROR (Status)) {\r | |
313 | return Status;\r | |
314 | }\r | |
315 | \r | |
316 | return EFI_SUCCESS;\r | |
317 | }\r | |
318 | \r |