/** @file | |
Entry point of OVMF ACPI Platform Driver | |
Copyright (C) 2015, Red Hat, Inc. | |
Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR> | |
This program and the accompanying materials are licensed and made available | |
under the terms and conditions of the BSD License which accompanies this | |
distribution. The full text of the license may be found at | |
http://opensource.org/licenses/bsd-license.php | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT | |
WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
**/ | |
#include <Protocol/PciEnumerationComplete.h> | |
#include "AcpiPlatform.h" | |
STATIC | |
EFI_ACPI_TABLE_PROTOCOL * | |
FindAcpiTableProtocol ( | |
VOID | |
) | |
{ | |
EFI_STATUS Status; | |
EFI_ACPI_TABLE_PROTOCOL *AcpiTable; | |
Status = gBS->LocateProtocol ( | |
&gEfiAcpiTableProtocolGuid, | |
NULL, | |
(VOID**)&AcpiTable | |
); | |
ASSERT_EFI_ERROR (Status); | |
return AcpiTable; | |
} | |
STATIC | |
VOID | |
EFIAPI | |
OnPciEnumerated ( | |
IN EFI_EVENT Event, | |
IN VOID *Context | |
) | |
{ | |
EFI_STATUS Status; | |
DEBUG ((EFI_D_INFO, "%a: PCI enumeration complete, installing ACPI tables\n", | |
__FUNCTION__)); | |
Status = InstallAcpiTables (FindAcpiTableProtocol ()); | |
if (EFI_ERROR (Status)) { | |
DEBUG ((EFI_D_ERROR, "%a: InstallAcpiTables: %r\n", __FUNCTION__, Status)); | |
} | |
gBS->CloseEvent (Event); | |
} | |
EFI_STATUS | |
EFIAPI | |
AcpiPlatformEntryPoint ( | |
IN EFI_HANDLE ImageHandle, | |
IN EFI_SYSTEM_TABLE *SystemTable | |
) | |
{ | |
EFI_STATUS Status; | |
VOID *Interface; | |
EFI_EVENT PciEnumerated; | |
VOID *Registration; | |
// | |
// If the platform doesn't support PCI, or PCI enumeration has been disabled, | |
// install the tables at once, and let the entry point's return code reflect | |
// the full functionality. | |
// | |
if (PcdGetBool (PcdPciDisableBusEnumeration)) { | |
DEBUG ((EFI_D_INFO, "%a: PCI or its enumeration disabled, installing " | |
"ACPI tables\n", __FUNCTION__)); | |
return InstallAcpiTables (FindAcpiTableProtocol ()); | |
} | |
// | |
// Similarly, if PCI enumeration has already completed, install the tables | |
// immediately. | |
// | |
Status = gBS->LocateProtocol (&gEfiPciEnumerationCompleteProtocolGuid, | |
NULL /* Registration */, &Interface); | |
if (!EFI_ERROR (Status)) { | |
DEBUG ((EFI_D_INFO, "%a: PCI enumeration already complete, " | |
"installing ACPI tables\n", __FUNCTION__)); | |
return InstallAcpiTables (FindAcpiTableProtocol ()); | |
} | |
ASSERT (Status == EFI_NOT_FOUND); | |
// | |
// Otherwise, delay installing the ACPI tables until PCI enumeration | |
// completes. The entry point's return status will only reflect the callback | |
// setup. | |
// | |
Status = gBS->CreateEvent (EVT_NOTIFY_SIGNAL, TPL_CALLBACK, OnPciEnumerated, | |
NULL /* Context */, &PciEnumerated); | |
if (EFI_ERROR (Status)) { | |
return Status; | |
} | |
Status = gBS->RegisterProtocolNotify ( | |
&gEfiPciEnumerationCompleteProtocolGuid, PciEnumerated, | |
&Registration); | |
if (EFI_ERROR (Status)) { | |
gBS->CloseEvent (PciEnumerated); | |
} else { | |
DEBUG ((EFI_D_INFO, "%a: PCI enumeration pending, registered callback\n", | |
__FUNCTION__)); | |
} | |
return Status; | |
} |