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522203de | 1 | /** @file\r |
2 | OVMF ACPI QEMU support\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2012, 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 "AcpiPlatform.h"\r | |
255b4184 | 16 | #include <Library/BaseMemoryLib.h>\r |
17 | #include <Library/MemoryAllocationLib.h>\r | |
522203de | 18 | #include <Library/QemuFwCfgLib.h>\r |
19 | \r | |
20 | \r | |
21 | BOOLEAN\r | |
22 | QemuDetected (\r | |
23 | VOID\r | |
24 | )\r | |
25 | {\r | |
26 | if (!QemuFwCfgIsAvailable ()) {\r | |
27 | return FALSE;\r | |
28 | }\r | |
29 | \r | |
30 | return TRUE;\r | |
31 | }\r | |
32 | \r | |
33 | \r | |
255b4184 | 34 | STATIC\r |
35 | EFI_STATUS\r | |
36 | EFIAPI\r | |
37 | QemuInstallAcpiMadtTable (\r | |
38 | IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,\r | |
39 | IN VOID *AcpiTableBuffer,\r | |
40 | IN UINTN AcpiTableBufferSize,\r | |
41 | OUT UINTN *TableKey\r | |
42 | )\r | |
43 | {\r | |
44 | EFI_STATUS Status;\r | |
45 | UINTN Count;\r | |
46 | UINTN Loop;\r | |
47 | EFI_ACPI_DESCRIPTION_HEADER *Hdr;\r | |
48 | UINTN NewBufferSize;\r | |
49 | EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC_STRUCTURE *LocalApic;\r | |
50 | \r | |
51 | QemuFwCfgSelectItem (QemuFwCfgItemSmpCpuCount);\r | |
52 | Count = (UINTN) QemuFwCfgRead16 ();\r | |
53 | ASSERT (Count >= 1);\r | |
54 | \r | |
55 | if (Count == 1) {\r | |
56 | //\r | |
57 | // The pre-built MADT table covers the single CPU case\r | |
58 | //\r | |
59 | return InstallAcpiTable (\r | |
60 | AcpiProtocol,\r | |
61 | AcpiTableBuffer,\r | |
62 | AcpiTableBufferSize,\r | |
63 | TableKey\r | |
64 | );\r | |
65 | }\r | |
66 | \r | |
67 | //\r | |
68 | // We need to add additional Local APIC entries to the MADT\r | |
69 | //\r | |
70 | NewBufferSize = AcpiTableBufferSize + ((Count - 1) * sizeof (*LocalApic));\r | |
71 | Hdr = (EFI_ACPI_DESCRIPTION_HEADER*) AllocatePool (NewBufferSize);\r | |
72 | ASSERT (Hdr != NULL);\r | |
73 | \r | |
74 | CopyMem (Hdr, AcpiTableBuffer, AcpiTableBufferSize);\r | |
75 | \r | |
76 | LocalApic = (EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC_STRUCTURE*)\r | |
77 | (((UINT8*) Hdr) + AcpiTableBufferSize);\r | |
78 | \r | |
79 | //\r | |
80 | // Add Local APIC entries for the APs to the MADT\r | |
81 | //\r | |
82 | for (Loop = 1; Loop < Count; Loop++) {\r | |
83 | LocalApic->Type = EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC;\r | |
84 | LocalApic->Length = sizeof (*LocalApic);\r | |
75ccc2b2 | 85 | LocalApic->AcpiProcessorId = (UINT8) Loop;\r |
86 | LocalApic->ApicId = (UINT8) Loop;\r | |
255b4184 | 87 | LocalApic->Flags = 1;\r |
88 | LocalApic++;\r | |
89 | }\r | |
90 | \r | |
75ccc2b2 | 91 | Hdr->Length = (UINT32) NewBufferSize;\r |
255b4184 | 92 | \r |
93 | Status = InstallAcpiTable (AcpiProtocol, Hdr, NewBufferSize, TableKey);\r | |
94 | \r | |
95 | FreePool (Hdr);\r | |
96 | \r | |
97 | return Status;\r | |
98 | }\r | |
99 | \r | |
100 | \r | |
522203de | 101 | EFI_STATUS\r |
102 | EFIAPI\r | |
103 | QemuInstallAcpiTable (\r | |
104 | IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,\r | |
105 | IN VOID *AcpiTableBuffer,\r | |
106 | IN UINTN AcpiTableBufferSize,\r | |
107 | OUT UINTN *TableKey\r | |
108 | )\r | |
109 | {\r | |
255b4184 | 110 | EFI_ACPI_DESCRIPTION_HEADER *Hdr;\r |
111 | EFI_ACPI_TABLE_INSTALL_ACPI_TABLE TableInstallFunction;\r | |
112 | \r | |
113 | Hdr = (EFI_ACPI_DESCRIPTION_HEADER*) AcpiTableBuffer;\r | |
114 | switch (Hdr->Signature) {\r | |
115 | case EFI_ACPI_1_0_APIC_SIGNATURE:\r | |
116 | TableInstallFunction = QemuInstallAcpiMadtTable;\r | |
117 | break;\r | |
118 | default:\r | |
119 | TableInstallFunction = InstallAcpiTable;\r | |
120 | }\r | |
121 | \r | |
122 | return TableInstallFunction (\r | |
522203de | 123 | AcpiProtocol,\r |
124 | AcpiTableBuffer,\r | |
125 | AcpiTableBufferSize,\r | |
126 | TableKey\r | |
127 | );\r | |
128 | }\r | |
129 | \r |