projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| c9bba52f LE |
1 | /** @file\r |
| 2 | Entry point of OVMF ACPI Platform Driver for Xen guests\r | |
| 3 | \r | |
| 4 | Copyright (C) 2015-2021, 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> // 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 | |
| 15 | \r | |
| 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 | |
| 24 | EFI_STATUS Status;\r | |
| 25 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
| 26 | \r | |
| 27 | Status = gBS->LocateProtocol (\r | |
| 28 | &gEfiAcpiTableProtocolGuid,\r | |
| 29 | NULL,\r | |
| 30 | (VOID**)&AcpiTable\r | |
| 31 | );\r | |
| 32 | ASSERT_EFI_ERROR (Status);\r | |
| 33 | return AcpiTable;\r | |
| 34 | }\r | |
| 35 | \r | |
| 36 | \r | |
| 37 | STATIC\r | |
| 38 | VOID\r | |
| 39 | EFIAPI\r | |
| 40 | OnRootBridgesConnected (\r | |
| 41 | IN EFI_EVENT Event,\r | |
| 42 | IN VOID *Context\r | |
| 43 | )\r | |
| 44 | {\r | |
| 45 | EFI_STATUS Status;\r | |
| 46 | \r | |
| 47 | DEBUG ((DEBUG_INFO,\r | |
| 48 | "%a: root bridges have been connected, installing ACPI tables\n",\r | |
| 49 | __FUNCTION__));\r | |
| 50 | Status = InstallAcpiTables (FindAcpiTableProtocol ());\r | |
| 51 | if (EFI_ERROR (Status)) {\r | |
| 52 | DEBUG ((DEBUG_ERROR, "%a: InstallAcpiTables: %r\n", __FUNCTION__, Status));\r | |
| 53 | }\r | |
| 54 | gBS->CloseEvent (Event);\r | |
| 55 | }\r | |
| 56 | \r | |
| 57 | \r | |
| 58 | EFI_STATUS\r | |
| 59 | EFIAPI\r | |
| 60 | AcpiPlatformEntryPoint (\r | |
| 61 | IN EFI_HANDLE ImageHandle,\r | |
| 62 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
| 63 | )\r | |
| 64 | {\r | |
| 65 | EFI_STATUS Status;\r | |
| 66 | EFI_EVENT RootBridgesConnected;\r | |
| 67 | \r | |
| 68 | //\r | |
| 69 | // If the platform doesn't support PCI, or PCI enumeration has been disabled,\r | |
| 70 | // install the tables at once, and let the entry point's return code reflect\r | |
| 71 | // the full functionality.\r | |
| 72 | //\r | |
| 73 | if (PcdGetBool (PcdPciDisableBusEnumeration)) {\r | |
| 74 | DEBUG ((DEBUG_INFO, "%a: PCI or its enumeration disabled, installing "\r | |
| 75 | "ACPI tables\n", __FUNCTION__));\r | |
| 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 | |
| 85 | Status = gBS->CreateEventEx (EVT_NOTIFY_SIGNAL, TPL_CALLBACK,\r | |
| 86 | OnRootBridgesConnected, NULL /* Context */,\r | |
| 87 | &gRootBridgesConnectedEventGroupGuid, &RootBridgesConnected);\r | |
| 88 | if (!EFI_ERROR (Status)) {\r | |
| 89 | DEBUG ((DEBUG_INFO,\r | |
| 90 | "%a: waiting for root bridges to be connected, registered callback\n",\r | |
| 91 | __FUNCTION__));\r | |
| 92 | }\r | |
| 93 | \r | |
| 94 | return Status;\r | |
| 95 | }\r |