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1 | /** @file\r |
2 | Xen ARM ACPI Platform Driver using Xen ARM multiboot protocol\r | |
3 | \r | |
4 | Copyright (C) 2016, Linaro Ltd. All rights reserved.\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <Library/BaseLib.h>\r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/UefiBootServicesTableLib.h>\r | |
19 | #include <Library/UefiDriverEntryPoint.h>\r | |
20 | \r | |
21 | #include <Protocol/AcpiTable.h>\r | |
22 | #include <Protocol/FdtClient.h>\r | |
23 | \r | |
24 | #include <IndustryStandard/Acpi.h>\r | |
25 | \r | |
26 | /**\r | |
27 | Get the address of Xen ACPI Root System Description Pointer (RSDP)\r | |
28 | structure.\r | |
29 | \r | |
30 | @param RsdpStructurePtr Return pointer to RSDP structure\r | |
31 | \r | |
32 | @return EFI_SUCCESS Find Xen RSDP structure successfully.\r | |
33 | @return EFI_NOT_FOUND Don't find Xen RSDP structure.\r | |
34 | @return EFI_ABORTED Find Xen RSDP structure, but it's not integrated.\r | |
35 | \r | |
36 | **/\r | |
37 | STATIC\r | |
38 | EFI_STATUS\r | |
39 | EFIAPI\r | |
40 | GetXenArmAcpiRsdp (\r | |
41 | OUT EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER **RsdpPtr\r | |
42 | )\r | |
43 | {\r | |
44 | EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr;\r | |
45 | EFI_STATUS Status;\r | |
46 | FDT_CLIENT_PROTOCOL *FdtClient;\r | |
47 | CONST UINT64 *Reg;\r | |
48 | UINT32 RegElemSize, RegSize;\r | |
49 | UINT64 RegBase;\r | |
50 | UINT8 Sum;\r | |
51 | \r | |
52 | RsdpStructurePtr = NULL;\r | |
53 | FdtClient = NULL;\r | |
54 | //\r | |
55 | // Get the RSDP structure address from DeviceTree\r | |
56 | //\r | |
57 | Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,\r | |
58 | (VOID **)&FdtClient);\r | |
59 | ASSERT_EFI_ERROR (Status);\r | |
60 | \r | |
61 | Status = FdtClient->FindCompatibleNodeReg (FdtClient, "xen,guest-acpi",\r | |
62 | (CONST VOID **)&Reg, &RegElemSize, &RegSize);\r | |
63 | if (EFI_ERROR (Status)) {\r | |
64 | DEBUG ((EFI_D_WARN, "%a: No 'xen,guest-acpi' compatible DT node found\n",\r | |
65 | __FUNCTION__));\r | |
66 | return EFI_NOT_FOUND;\r | |
67 | }\r | |
68 | \r | |
69 | ASSERT (RegSize == 2 * sizeof (UINT64));\r | |
70 | \r | |
71 | RegBase = SwapBytes64(Reg[0]);\r | |
72 | RsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)RegBase;\r | |
73 | \r | |
74 | if (RsdpStructurePtr && RsdpStructurePtr->Revision >= 2) {\r | |
75 | Sum = CalculateSum8 ((CONST UINT8 *)RsdpStructurePtr,\r | |
76 | sizeof (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER));\r | |
77 | if (Sum != 0) {\r | |
78 | return EFI_ABORTED;\r | |
79 | }\r | |
80 | }\r | |
81 | \r | |
82 | *RsdpPtr = RsdpStructurePtr;\r | |
83 | return EFI_SUCCESS;\r | |
84 | }\r | |
85 | \r | |
86 | /**\r | |
87 | Get Xen Acpi tables from the RSDP structure. And installs Xen ACPI tables\r | |
88 | into the RSDT/XSDT using InstallAcpiTable. Some signature of the installed\r | |
89 | ACPI tables are: FACP, APIC, GTDT, DSDT.\r | |
90 | \r | |
91 | @param AcpiProtocol Protocol instance pointer.\r | |
92 | \r | |
93 | @return EFI_SUCCESS The table was successfully inserted.\r | |
94 | @return EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL, TableHandle is\r | |
95 | NULL, or AcpiTableBufferSize and the size\r | |
96 | field embedded in the ACPI table pointed to\r | |
97 | by AcpiTableBuffer are not in sync.\r | |
98 | @return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete the request.\r | |
99 | \r | |
100 | **/\r | |
101 | STATIC\r | |
102 | EFI_STATUS\r | |
103 | EFIAPI\r | |
104 | InstallXenArmTables (\r | |
105 | IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol\r | |
106 | )\r | |
107 | {\r | |
108 | EFI_STATUS Status;\r | |
109 | UINTN TableHandle;\r | |
110 | VOID *CurrentTableEntry;\r | |
111 | UINTN CurrentTablePointer;\r | |
112 | EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;\r | |
113 | UINTN Index;\r | |
114 | UINTN NumberOfTableEntries;\r | |
115 | EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *XenAcpiRsdpStructurePtr;\r | |
116 | EFI_ACPI_DESCRIPTION_HEADER *Xsdt;\r | |
117 | EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *FadtTable;\r | |
118 | EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;\r | |
119 | \r | |
120 | XenAcpiRsdpStructurePtr = NULL;\r | |
121 | FadtTable = NULL;\r | |
122 | DsdtTable = NULL;\r | |
123 | TableHandle = 0;\r | |
124 | NumberOfTableEntries = 0;\r | |
125 | \r | |
126 | //\r | |
127 | // Try to find Xen ARM ACPI tables\r | |
128 | //\r | |
129 | Status = GetXenArmAcpiRsdp (&XenAcpiRsdpStructurePtr);\r | |
130 | if (EFI_ERROR (Status)) {\r | |
131 | DEBUG ((EFI_D_INFO, "%a: No RSDP table found\n", __FUNCTION__));\r | |
132 | return Status;\r | |
133 | }\r | |
134 | \r | |
135 | //\r | |
136 | // If XSDT table is find, just install its tables.\r | |
137 | //\r | |
138 | if (XenAcpiRsdpStructurePtr->XsdtAddress) {\r | |
139 | //\r | |
140 | // Retrieve the addresses of XSDT and\r | |
141 | // calculate the number of its table entries.\r | |
142 | //\r | |
143 | Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)\r | |
144 | XenAcpiRsdpStructurePtr->XsdtAddress;\r | |
145 | NumberOfTableEntries = (Xsdt->Length -\r | |
146 | sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /\r | |
147 | sizeof (UINT64);\r | |
148 | //\r | |
149 | // Install ACPI tables found in XSDT.\r | |
150 | //\r | |
151 | for (Index = 0; Index < NumberOfTableEntries; Index++) {\r | |
152 | //\r | |
153 | // Get the table entry from XSDT\r | |
154 | //\r | |
155 | CurrentTableEntry = (VOID *) ((UINT8 *) Xsdt +\r | |
156 | sizeof (EFI_ACPI_DESCRIPTION_HEADER) +\r | |
157 | Index * sizeof (UINT64));\r | |
158 | CurrentTablePointer = (UINTN) *(UINT64 *)CurrentTableEntry;\r | |
159 | CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;\r | |
160 | \r | |
161 | //\r | |
162 | // Install the XSDT tables\r | |
163 | //\r | |
164 | Status = AcpiProtocol->InstallAcpiTable (\r | |
165 | AcpiProtocol,\r | |
166 | CurrentTable,\r | |
167 | CurrentTable->Length,\r | |
168 | &TableHandle\r | |
169 | );\r | |
170 | \r | |
171 | if (EFI_ERROR (Status)) {\r | |
172 | return Status;\r | |
173 | }\r | |
174 | \r | |
175 | //\r | |
176 | // Get the FACS and DSDT table address from the table FADT\r | |
177 | //\r | |
178 | if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {\r | |
179 | FadtTable = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)\r | |
180 | (UINTN) CurrentTablePointer;\r | |
181 | DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) FadtTable->Dsdt;\r | |
182 | }\r | |
183 | }\r | |
184 | }\r | |
185 | \r | |
186 | //\r | |
187 | // Install DSDT table.\r | |
188 | //\r | |
189 | Status = AcpiProtocol->InstallAcpiTable (\r | |
190 | AcpiProtocol,\r | |
191 | DsdtTable,\r | |
192 | DsdtTable->Length,\r | |
193 | &TableHandle\r | |
194 | );\r | |
195 | if (EFI_ERROR (Status)) {\r | |
196 | return Status;\r | |
197 | }\r | |
198 | \r | |
199 | return EFI_SUCCESS;\r | |
200 | }\r | |
201 | \r | |
202 | STATIC\r | |
203 | EFI_ACPI_TABLE_PROTOCOL *\r | |
204 | FindAcpiTableProtocol (\r | |
205 | VOID\r | |
206 | )\r | |
207 | {\r | |
208 | EFI_STATUS Status;\r | |
209 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
210 | \r | |
211 | AcpiTable = NULL;\r | |
212 | Status = gBS->LocateProtocol (\r | |
213 | &gEfiAcpiTableProtocolGuid,\r | |
214 | NULL,\r | |
215 | (VOID**)&AcpiTable\r | |
216 | );\r | |
217 | ASSERT_EFI_ERROR (Status);\r | |
218 | return AcpiTable;\r | |
219 | }\r | |
220 | \r | |
221 | /**\r | |
222 | Entrypoint of Xen ARM Acpi Platform driver.\r | |
223 | \r | |
224 | @param ImageHandle\r | |
225 | @param SystemTable\r | |
226 | \r | |
227 | @return EFI_SUCCESS\r | |
228 | @return EFI_LOAD_ERROR\r | |
229 | @return EFI_OUT_OF_RESOURCES\r | |
230 | \r | |
231 | **/\r | |
232 | \r | |
233 | EFI_STATUS\r | |
234 | EFIAPI\r | |
235 | XenAcpiPlatformEntryPoint (\r | |
236 | IN EFI_HANDLE ImageHandle,\r | |
237 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
238 | )\r | |
239 | {\r | |
240 | EFI_STATUS Status;\r | |
241 | \r | |
242 | Status = InstallXenArmTables (FindAcpiTableProtocol ());\r | |
243 | return Status;\r | |
244 | }\r |