1 /** @file 2 This is an implementation of the ACPI Support protocol. This is defined in 3 the Tiano ACPI External Product Specification, revision 0.3.6. 4 5 Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> 6 7 This program and the accompanying materials 8 are licensed and made available under the terms and conditions 9 of the BSD License which accompanies this distribution. The 10 full text of the license may be found at 11 http://opensource.org/licenses/bsd-license.php 12 13 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 14 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 15 16 **/ 17 18 // 19 // Includes 20 // 21 #include "AcpiSupport.h" 22 23 // 24 // Handle to install ACPI Table Protocol (and ACPI Suppport protocol). 25 // 26 EFI_HANDLE mHandle = NULL; 27 28 /** 29 Entry point of the ACPI support driver. This function creates and initializes an instance of the ACPI Support 30 Protocol and installs it on a new handle. 31 32 @param ImageHandle A handle for the image that is initializing this driver 33 @param SystemTable A pointer to the EFI system table 34 35 @retval EFI_SUCCESS Driver initialized successfully 36 @retval EFI_LOAD_ERROR Failed to Initialize or has been loaded 37 @retval EFI_OUT_OF_RESOURCES Could not allocate needed resources 38 **/ 39 EFI_STATUS 40 EFIAPI 41 InstallAcpiSupport ( 42 IN EFI_HANDLE ImageHandle, 43 IN EFI_SYSTEM_TABLE *SystemTable 44 ) 45 46 { 47 EFI_STATUS Status; 48 EFI_ACPI_SUPPORT_INSTANCE *PrivateData; 49 50 // 51 // Initialize our protocol 52 // 53 PrivateData = AllocateZeroPool (sizeof (EFI_ACPI_SUPPORT_INSTANCE)); 54 ASSERT (PrivateData); 55 PrivateData->Signature = EFI_ACPI_SUPPORT_SIGNATURE; 56 57 // 58 // Call all constructors per produced protocols 59 // 60 Status = AcpiSupportAcpiSupportConstructor (PrivateData); 61 if (EFI_ERROR (Status)) { 62 gBS->FreePool (PrivateData); 63 return EFI_LOAD_ERROR; 64 } 65 66 // 67 // Install ACPI Table protocol and optional ACPI support protocol based on 68 // feature flag: PcdInstallAcpiSupportProtocol. 69 // 70 if (FeaturePcdGet (PcdInstallAcpiSupportProtocol)) { 71 Status = gBS->InstallMultipleProtocolInterfaces ( 72 &mHandle, 73 &gEfiAcpiTableProtocolGuid, 74 &PrivateData->AcpiTableProtocol, 75 &gEfiAcpiSupportProtocolGuid, 76 &PrivateData->AcpiSupport, 77 NULL 78 ); 79 ASSERT_EFI_ERROR (Status); 80 } else { 81 Status = gBS->InstallMultipleProtocolInterfaces ( 82 &mHandle, 83 &gEfiAcpiTableProtocolGuid, 84 &PrivateData->AcpiTableProtocol, 85 NULL 86 ); 87 ASSERT_EFI_ERROR (Status); 88 } 89 90 return Status; 91 } 92
