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04951644 LE |
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 | This program and the accompanying materials are licensed and made available\r | |
8 | under the terms and conditions of the BSD License which accompanies this\r | |
9 | 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, WITHOUT\r | |
13 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | **/\r | |
15 | \r | |
b6bc800d | 16 | #include <Guid/RootBridgesConnectedEventGroup.h>\r |
04951644 LE |
17 | #include "AcpiPlatform.h"\r |
18 | \r | |
19 | STATIC\r | |
20 | EFI_ACPI_TABLE_PROTOCOL *\r | |
21 | FindAcpiTableProtocol (\r | |
22 | VOID\r | |
23 | )\r | |
24 | {\r | |
25 | EFI_STATUS Status;\r | |
26 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
27 | \r | |
28 | Status = gBS->LocateProtocol (\r | |
29 | &gEfiAcpiTableProtocolGuid,\r | |
30 | NULL,\r | |
31 | (VOID**)&AcpiTable\r | |
32 | );\r | |
33 | ASSERT_EFI_ERROR (Status);\r | |
34 | return AcpiTable;\r | |
35 | }\r | |
36 | \r | |
818bc86a LE |
37 | \r |
38 | STATIC\r | |
39 | VOID\r | |
40 | EFIAPI\r | |
b6bc800d | 41 | OnRootBridgesConnected (\r |
818bc86a LE |
42 | IN EFI_EVENT Event,\r |
43 | IN VOID *Context\r | |
44 | )\r | |
45 | {\r | |
46 | EFI_STATUS Status;\r | |
47 | \r | |
b6bc800d LE |
48 | DEBUG ((EFI_D_INFO,\r |
49 | "%a: root bridges have been connected, installing ACPI tables\n",\r | |
818bc86a LE |
50 | __FUNCTION__));\r |
51 | Status = InstallAcpiTables (FindAcpiTableProtocol ());\r | |
52 | if (EFI_ERROR (Status)) {\r | |
53 | DEBUG ((EFI_D_ERROR, "%a: InstallAcpiTables: %r\n", __FUNCTION__, Status));\r | |
54 | }\r | |
55 | gBS->CloseEvent (Event);\r | |
56 | }\r | |
57 | \r | |
58 | \r | |
04951644 LE |
59 | EFI_STATUS\r |
60 | EFIAPI\r | |
61 | AcpiPlatformEntryPoint (\r | |
62 | IN EFI_HANDLE ImageHandle,\r | |
63 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
64 | )\r | |
65 | {\r | |
66 | EFI_STATUS Status;\r | |
b6bc800d | 67 | EFI_EVENT RootBridgesConnected;\r |
818bc86a LE |
68 | \r |
69 | //\r | |
70 | // If the platform doesn't support PCI, or PCI enumeration has been disabled,\r | |
71 | // install the tables at once, and let the entry point's return code reflect\r | |
72 | // the full functionality.\r | |
73 | //\r | |
74 | if (PcdGetBool (PcdPciDisableBusEnumeration)) {\r | |
75 | DEBUG ((EFI_D_INFO, "%a: PCI or its enumeration disabled, installing "\r | |
76 | "ACPI tables\n", __FUNCTION__));\r | |
77 | return InstallAcpiTables (FindAcpiTableProtocol ());\r | |
78 | }\r | |
79 | \r | |
80 | //\r | |
b6bc800d LE |
81 | // Otherwise, delay installing the ACPI tables until root bridges are\r |
82 | // connected. The entry point's return status will only reflect the callback\r | |
83 | // setup. (Note that we're a DXE_DRIVER; our entry point function is invoked\r | |
84 | // strictly before BDS is entered and can connect the root bridges.)\r | |
818bc86a | 85 | //\r |
b6bc800d LE |
86 | Status = gBS->CreateEventEx (EVT_NOTIFY_SIGNAL, TPL_CALLBACK,\r |
87 | OnRootBridgesConnected, NULL /* Context */,\r | |
88 | &gRootBridgesConnectedEventGroupGuid, &RootBridgesConnected);\r | |
818bc86a | 89 | if (!EFI_ERROR (Status)) {\r |
b6bc800d LE |
90 | DEBUG ((EFI_D_INFO,\r |
91 | "%a: waiting for root bridges to be connected, registered callback\n",\r | |
818bc86a LE |
92 | __FUNCTION__));\r |
93 | }\r | |
04951644 | 94 | \r |
04951644 LE |
95 | return Status;\r |
96 | }\r |