/** @file
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Boot service DXE ASL update library implementation.
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These functions in this file can be called during DXE and cannot be called during runtime
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or in SMM which should use a RT or SMM library.
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This library uses the ACPI Support protocol.
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Copyright (c) 2017 - 2020, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Uefi/UefiBaseType.h>
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#include <Uefi/UefiSpec.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/AslUpdateLib.h>
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//
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// Function implementations
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//
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/**
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Initialize the ASL update library state.
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This must be called at the beginning of the function calls in this library.
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@retval EFI_SUCCESS - The function completed successfully.
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**/
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EFI_STATUS
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InitializeAslUpdateLib (
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VOID
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)
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{
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return EFI_SUCCESS;
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}
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/**
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This function uses the ACPI SDT protocol to locate an ACPI SSDT table.
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@param[in] TableId - Pointer to an ASCII string containing the OEM Table ID from the ACPI table header
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@param[in] TableIdSize - Length of the TableId to match. Table ID are 8 bytes long, this function
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will consider it a match if the first TableIdSize bytes match
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@param[in, out] Table - Updated with a pointer to the table
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@param[in, out] Handle - AcpiSupport protocol table handle for the table found
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@retval EFI_SUCCESS - The function completed successfully.
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**/
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EFI_STATUS
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LocateAcpiTableByOemTableId (
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IN UINT8 *TableId,
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IN UINT8 TableIdSize,
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IN OUT EFI_ACPI_DESCRIPTION_HEADER **Table,
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IN OUT UINTN *Handle
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)
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{
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return EFI_SUCCESS;
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}
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/**
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This procedure will update immediate value assigned to a Name.
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@param[in] AslSignature - The signature of Operation Region that we want to update.
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@param[in] Buffer - source of data to be written over original aml
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@param[in] Length - length of data to be overwritten
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@retval EFI_SUCCESS - The function completed successfully.
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**/
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EFI_STATUS
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EFIAPI
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UpdateNameAslCode (
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IN UINT32 AslSignature,
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IN VOID *Buffer,
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IN UINTN Length
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)
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{
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return EFI_SUCCESS;
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}
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/**
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This procedure will update immediate value assigned to a Name in SSDT table.
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@param[in] TableId - Pointer to an ASCII string containing the OEM Table ID from the ACPI table header
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@param[in] TableIdSize - Length of the TableId to match. Table ID are 8 bytes long, this function
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@param[in] AslSignature - The signature of Operation Region that we want to update.
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@param[in] Buffer - source of data to be written over original aml
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@param[in] Length - length of data to be overwritten
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@retval EFI_SUCCESS - The function completed successfully.
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**/
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EFI_STATUS
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EFIAPI
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UpdateSsdtNameAslCode (
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IN UINT8 *TableId,
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IN UINT8 TableIdSize,
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IN UINT32 AslSignature,
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IN VOID *Buffer,
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IN UINTN Length
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)
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{
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return EFI_SUCCESS;
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}
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/**
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This procedure will update the name of ASL Method.
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@param[in] AslSignature - The signature of Operation Region that we want to update.
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@param[in] Buffer - source of data to be written over original aml
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@param[in] Length - length of data to be overwritten
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@retval EFI_SUCCESS - The function completed successfully.
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**/
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EFI_STATUS
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EFIAPI
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UpdateMethodAslCode (
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IN UINT32 AslSignature,
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IN VOID *Buffer,
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IN UINTN Length
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)
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{
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return EFI_SUCCESS;
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}
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/**
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This function uses the ACPI SDT protocol to locate an ACPI table.
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It is really only useful for finding tables that only have a single instance,
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e.g. FADT, FACS, MADT, etc. It is not good for locating SSDT, etc.
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Matches are determined by finding the table with ACPI table that has
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a matching signature.
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@param[in] Signature - Pointer to an ASCII string containing the OEM Table ID from the ACPI table header
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@param[in, out] Table - Updated with a pointer to the table
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@param[in, out] Handle - AcpiSupport protocol table handle for the table found
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@retval EFI_SUCCESS - The function completed successfully.
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**/
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EFI_STATUS
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EFIAPI
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LocateAcpiTableBySignature (
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IN UINT32 Signature,
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IN OUT EFI_ACPI_DESCRIPTION_HEADER **Table,
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IN OUT UINTN *Handle
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)
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{
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return EFI_SUCCESS;
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}
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