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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 | |
b26f0cf9 | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
04951644 LE |
8 | **/\r |
9 | \r | |
cc302b79 LE |
10 | #include <Guid/RootBridgesConnectedEventGroup.h> // gRootBridgesConnectedEve...\r |
11 | #include <Library/DebugLib.h> // DEBUG()\r | |
12 | #include <Library/PcdLib.h> // PcdGetBool()\r | |
13 | #include <Library/UefiBootServicesTableLib.h> // gBS\r | |
14 | #include <Protocol/AcpiTable.h> // EFI_ACPI_TABLE_PROTOCOL\r | |
180f1908 | 15 | \r |
04951644 LE |
16 | #include "AcpiPlatform.h"\r |
17 | \r | |
18 | STATIC\r | |
19 | EFI_ACPI_TABLE_PROTOCOL *\r | |
20 | FindAcpiTableProtocol (\r | |
21 | VOID\r | |
22 | )\r | |
23 | {\r | |
ac0a286f MK |
24 | EFI_STATUS Status;\r |
25 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
04951644 LE |
26 | \r |
27 | Status = gBS->LocateProtocol (\r | |
28 | &gEfiAcpiTableProtocolGuid,\r | |
29 | NULL,\r | |
ac0a286f | 30 | (VOID **)&AcpiTable\r |
04951644 LE |
31 | );\r |
32 | ASSERT_EFI_ERROR (Status);\r | |
33 | return AcpiTable;\r | |
34 | }\r | |
35 | \r | |
818bc86a LE |
36 | STATIC\r |
37 | VOID\r | |
38 | EFIAPI\r | |
b6bc800d | 39 | OnRootBridgesConnected (\r |
ac0a286f MK |
40 | IN EFI_EVENT Event,\r |
41 | IN VOID *Context\r | |
818bc86a LE |
42 | )\r |
43 | {\r | |
ac0a286f | 44 | EFI_STATUS Status;\r |
818bc86a | 45 | \r |
ac0a286f MK |
46 | DEBUG ((\r |
47 | DEBUG_INFO,\r | |
b6bc800d | 48 | "%a: root bridges have been connected, installing ACPI tables\n",\r |
ac0a286f MK |
49 | __FUNCTION__\r |
50 | ));\r | |
818bc86a LE |
51 | Status = InstallAcpiTables (FindAcpiTableProtocol ());\r |
52 | if (EFI_ERROR (Status)) {\r | |
70d5086c | 53 | DEBUG ((DEBUG_ERROR, "%a: InstallAcpiTables: %r\n", __FUNCTION__, Status));\r |
818bc86a | 54 | }\r |
ac0a286f | 55 | \r |
818bc86a LE |
56 | gBS->CloseEvent (Event);\r |
57 | }\r | |
58 | \r | |
04951644 LE |
59 | EFI_STATUS\r |
60 | EFIAPI\r | |
61 | AcpiPlatformEntryPoint (\r | |
ac0a286f MK |
62 | IN EFI_HANDLE ImageHandle,\r |
63 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
04951644 LE |
64 | )\r |
65 | {\r | |
ac0a286f MK |
66 | EFI_STATUS Status;\r |
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 | |
ac0a286f MK |
75 | DEBUG ((\r |
76 | DEBUG_INFO,\r | |
77 | "%a: PCI or its enumeration disabled, installing "\r | |
78 | "ACPI tables\n",\r | |
79 | __FUNCTION__\r | |
80 | ));\r | |
818bc86a LE |
81 | return InstallAcpiTables (FindAcpiTableProtocol ());\r |
82 | }\r | |
83 | \r | |
84 | //\r | |
b6bc800d LE |
85 | // Otherwise, delay installing the ACPI tables until root bridges are\r |
86 | // connected. The entry point's return status will only reflect the callback\r | |
87 | // setup. (Note that we're a DXE_DRIVER; our entry point function is invoked\r | |
88 | // strictly before BDS is entered and can connect the root bridges.)\r | |
818bc86a | 89 | //\r |
ac0a286f MK |
90 | Status = gBS->CreateEventEx (\r |
91 | EVT_NOTIFY_SIGNAL,\r | |
92 | TPL_CALLBACK,\r | |
93 | OnRootBridgesConnected,\r | |
94 | NULL /* Context */,\r | |
95 | &gRootBridgesConnectedEventGroupGuid,\r | |
96 | &RootBridgesConnected\r | |
97 | );\r | |
818bc86a | 98 | if (!EFI_ERROR (Status)) {\r |
ac0a286f MK |
99 | DEBUG ((\r |
100 | DEBUG_INFO,\r | |
b6bc800d | 101 | "%a: waiting for root bridges to be connected, registered callback\n",\r |
ac0a286f MK |
102 | __FUNCTION__\r |
103 | ));\r | |
818bc86a | 104 | }\r |
04951644 | 105 | \r |
04951644 LE |
106 | return Status;\r |
107 | }\r |