diff options
Diffstat (limited to 'EmbeddedPkg/Library/AcpiLib/AcpiLib.c')
| -rw-r--r-- | EmbeddedPkg/Library/AcpiLib/AcpiLib.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/EmbeddedPkg/Library/AcpiLib/AcpiLib.c b/EmbeddedPkg/Library/AcpiLib/AcpiLib.c new file mode 100644 index 000000000..409005592 --- /dev/null +++ b/EmbeddedPkg/Library/AcpiLib/AcpiLib.c @@ -0,0 +1,146 @@ +/** @file
+*
+* Copyright (c) 2014, ARM Limited. All rights reserved.
+*
+* 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 <Uefi.h>
+
+#include <Library/AcpiLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#include <Protocol/AcpiTable.h>
+#include <Protocol/FirmwareVolume2.h>
+
+#include <IndustryStandard/Acpi.h>
+
+/**
+ Locate and Install the ACPI tables from the Firmware Volume
+
+ @param AcpiFile Guid of the ACPI file into the Firmware Volume
+
+ @return EFI_SUCCESS The function completed successfully.
+ @return EFI_NOT_FOUND The protocol could not be located.
+ @return EFI_OUT_OF_RESOURCES There are not enough resources to find the protocol.
+
+**/
+EFI_STATUS
+LocateAndInstallAcpiFromFv (
+ IN CONST EFI_GUID* AcpiFile
+ )
+{
+ EFI_STATUS Status;
+ EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol;
+ EFI_HANDLE *HandleBuffer;
+ UINTN NumberOfHandles;
+ UINT32 FvStatus;
+ UINTN Index;
+ EFI_FIRMWARE_VOLUME2_PROTOCOL *FvInstance;
+ INTN SectionInstance;
+ UINTN SectionSize;
+ EFI_ACPI_COMMON_HEADER *AcpiTable;
+ UINTN AcpiTableSize;
+ UINTN AcpiTableKey;
+
+ // Ensure the ACPI Table is present
+ Status = gBS->LocateProtocol (
+ &gEfiAcpiTableProtocolGuid,
+ NULL,
+ (VOID**)&AcpiProtocol
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ FvStatus = 0;
+ SectionInstance = 0;
+
+ // Locate all the Firmware Volume protocols.
+ Status = gBS->LocateHandleBuffer (
+ ByProtocol,
+ &gEfiFirmwareVolume2ProtocolGuid,
+ NULL,
+ &NumberOfHandles,
+ &HandleBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ // Looking for FV with ACPI storage file
+ for (Index = 0; Index < NumberOfHandles; Index++) {
+ //
+ // Get the protocol on this handle
+ // This should not fail because of LocateHandleBuffer
+ //
+ Status = gBS->HandleProtocol (
+ HandleBuffer[Index],
+ &gEfiFirmwareVolume2ProtocolGuid,
+ (VOID**) &FvInstance
+ );
+ if (EFI_ERROR (Status)) {
+ goto FREE_HANDLE_BUFFER;
+ }
+
+ while (Status == EFI_SUCCESS) {
+ // AcpiTable must be allocated by ReadSection (ie: AcpiTable == NULL)
+ AcpiTable = NULL;
+
+ // See if it has the ACPI storage file
+ Status = FvInstance->ReadSection (
+ FvInstance,
+ AcpiFile,
+ EFI_SECTION_RAW,
+ SectionInstance,
+ (VOID**) &AcpiTable,
+ &SectionSize,
+ &FvStatus
+ );
+ if (!EFI_ERROR (Status)) {
+ AcpiTableKey = 0;
+ AcpiTableSize = ((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Length;
+ ASSERT (SectionSize >= AcpiTableSize);
+
+ DEBUG ((EFI_D_ERROR, "- Found '%c%c%c%c' ACPI Table\n",
+ (((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Signature & 0xFF),
+ ((((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Signature >> 8) & 0xFF),
+ ((((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Signature >> 16) & 0xFF),
+ ((((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Signature >> 24) & 0xFF)));
+
+ // Install the ACPI Table
+ Status = AcpiProtocol->InstallAcpiTable (
+ AcpiProtocol,
+ AcpiTable,
+ AcpiTableSize,
+ &AcpiTableKey
+ );
+ // Free memory allocated by ReadSection
+ gBS->FreePool (AcpiTable);
+
+ if (EFI_ERROR (Status)) {
+ break;
+ }
+
+ // Increment the section instance
+ SectionInstance++;
+ }
+ }
+ }
+
+FREE_HANDLE_BUFFER:
+ //
+ // Free any allocated buffers
+ //
+ gBS->FreePool (HandleBuffer);
+
+ return EFI_SUCCESS;
+}
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