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656419f9 RC |
1 | /** @file\r |
2 | Entry point of OVMF ACPI Platform Driver\r | |
3 | \r | |
4 | Copyright (C) 2015, Red Hat, Inc.\r | |
5 | Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
6 | \r | |
7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
8 | **/\r | |
9 | \r | |
10 | #include <Guid/RootBridgesConnectedEventGroup.h>\r | |
11 | #include "AcpiPlatform.h"\r | |
12 | \r | |
13 | STATIC\r | |
14 | EFI_ACPI_TABLE_PROTOCOL *\r | |
15 | FindAcpiTableProtocol (\r | |
16 | VOID\r | |
17 | )\r | |
18 | {\r | |
ac0a286f MK |
19 | EFI_STATUS Status;\r |
20 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
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21 | \r |
22 | Status = gBS->LocateProtocol (\r | |
23 | &gEfiAcpiTableProtocolGuid,\r | |
24 | NULL,\r | |
ac0a286f | 25 | (VOID **)&AcpiTable\r |
656419f9 RC |
26 | );\r |
27 | ASSERT_EFI_ERROR (Status);\r | |
28 | return AcpiTable;\r | |
29 | }\r | |
30 | \r | |
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31 | STATIC\r |
32 | VOID\r | |
33 | EFIAPI\r | |
34 | OnRootBridgesConnected (\r | |
ac0a286f MK |
35 | IN EFI_EVENT Event,\r |
36 | IN VOID *Context\r | |
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37 | )\r |
38 | {\r | |
ac0a286f | 39 | EFI_STATUS Status;\r |
656419f9 | 40 | \r |
ac0a286f MK |
41 | DEBUG ((\r |
42 | DEBUG_INFO,\r | |
656419f9 | 43 | "%a: root bridges have been connected, installing ACPI tables\n",\r |
ac0a286f MK |
44 | __FUNCTION__\r |
45 | ));\r | |
656419f9 RC |
46 | Status = InstallAcpiTables (FindAcpiTableProtocol ());\r |
47 | if (EFI_ERROR (Status)) {\r | |
48 | DEBUG ((DEBUG_ERROR, "%a: InstallAcpiTables: %r\n", __FUNCTION__, Status));\r | |
49 | }\r | |
ac0a286f | 50 | \r |
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51 | gBS->CloseEvent (Event);\r |
52 | }\r | |
53 | \r | |
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54 | EFI_STATUS\r |
55 | EFIAPI\r | |
56 | AcpiPlatformEntryPoint (\r | |
ac0a286f MK |
57 | IN EFI_HANDLE ImageHandle,\r |
58 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
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59 | )\r |
60 | {\r | |
ac0a286f MK |
61 | EFI_STATUS Status;\r |
62 | EFI_EVENT RootBridgesConnected;\r | |
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63 | \r |
64 | //\r | |
65 | // If the platform doesn't support PCI, or PCI enumeration has been disabled,\r | |
66 | // install the tables at once, and let the entry point's return code reflect\r | |
67 | // the full functionality.\r | |
68 | //\r | |
69 | if (PcdGetBool (PcdPciDisableBusEnumeration)) {\r | |
ac0a286f MK |
70 | DEBUG ((\r |
71 | DEBUG_INFO,\r | |
72 | "%a: PCI or its enumeration disabled, installing "\r | |
73 | "ACPI tables\n",\r | |
74 | __FUNCTION__\r | |
75 | ));\r | |
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76 | return InstallAcpiTables (FindAcpiTableProtocol ());\r |
77 | }\r | |
78 | \r | |
79 | //\r | |
80 | // Otherwise, delay installing the ACPI tables until root bridges are\r | |
81 | // connected. The entry point's return status will only reflect the callback\r | |
82 | // setup. (Note that we're a DXE_DRIVER; our entry point function is invoked\r | |
83 | // strictly before BDS is entered and can connect the root bridges.)\r | |
84 | //\r | |
ac0a286f MK |
85 | Status = gBS->CreateEventEx (\r |
86 | EVT_NOTIFY_SIGNAL,\r | |
87 | TPL_CALLBACK,\r | |
88 | OnRootBridgesConnected,\r | |
89 | NULL /* Context */,\r | |
90 | &gRootBridgesConnectedEventGroupGuid,\r | |
91 | &RootBridgesConnected\r | |
92 | );\r | |
656419f9 | 93 | if (!EFI_ERROR (Status)) {\r |
ac0a286f MK |
94 | DEBUG ((\r |
95 | DEBUG_INFO,\r | |
656419f9 | 96 | "%a: waiting for root bridges to be connected, registered callback\n",\r |
ac0a286f MK |
97 | __FUNCTION__\r |
98 | ));\r | |
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99 | }\r |
100 | \r | |
101 | return Status;\r | |
102 | }\r |