DynamicTablesPkg/Library/Acpi/Arm/AcpiRawLibArm/RawGenerator.c

/** @file
  MCFG Table Generator

  Copyright (c) 2017 - 2019, ARM Limited. All rights reserved.
  SPDX-License-Identifier: BSD-2-Clause-Patent
**/

#include <Library/AcpiLib.h>
#include <Library/DebugLib.h>
#include <Protocol/AcpiTable.h>

// Module specific include files.
#include <AcpiTableGenerator.h>
#include <ConfigurationManagerObject.h>
#include <ConfigurationManagerHelper.h>
#include <Library/TableHelperLib.h>
#include <Protocol/ConfigurationManagerProtocol.h>

/** Construct the ACPI table using the ACPI table data provided.

  This function invokes the Configuration Manager protocol interface
  to get the required hardware information for generating the ACPI
  table.

  If this function allocates any resources then they must be freed
  in the FreeXXXXTableResources function.

  @param [in]  This           Pointer to the table generator.
  @param [in]  AcpiTableInfo  Pointer to the ACPI Table Info.
  @param [in]  CfgMgrProtocol Pointer to the Configuration Manager
                              Protocol Interface.
  @param [out] Table          Pointer to the constructed ACPI Table.

  @retval EFI_SUCCESS           Table generated successfully.
  @retval EFI_INVALID_PARAMETER A parameter is invalid.
**/
STATIC
EFI_STATUS
EFIAPI
BuildRawTable (
  IN  CONST ACPI_TABLE_GENERATOR                  *CONST  This,
  IN  CONST CM_STD_OBJ_ACPI_TABLE_INFO            *CONST  AcpiTableInfo,
  IN  CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL  *CONST  CfgMgrProtocol,
  OUT       EFI_ACPI_DESCRIPTION_HEADER          **CONST  Table
  )
{
  ASSERT (This != NULL);
  ASSERT (AcpiTableInfo != NULL);
  ASSERT (CfgMgrProtocol != NULL);
  ASSERT (Table != NULL);
  ASSERT (AcpiTableInfo->TableGeneratorId == This->GeneratorID);
  ASSERT (AcpiTableInfo->AcpiTableData != NULL);

  if (AcpiTableInfo->AcpiTableData == NULL) {
    *Table = NULL;
    return EFI_INVALID_PARAMETER;
  }

  *Table = AcpiTableInfo->AcpiTableData;

  return EFI_SUCCESS;
}

/** This macro defines the Raw Generator revision.
*/
#define RAW_GENERATOR_REVISION  CREATE_REVISION (1, 0)

/** The interface for the Raw Table Generator.
*/
STATIC
CONST
ACPI_TABLE_GENERATOR  RawGenerator = {
  // Generator ID
  CREATE_STD_ACPI_TABLE_GEN_ID (EStdAcpiTableIdRaw),
  // Generator Description
  L"ACPI.STD.RAW.GENERATOR",
  // ACPI Table Signature - Unused
  0,
  // ACPI Table Revision - Unused
  0,
  // Minimum ACPI Table Revision - Unused
  0,
  // Creator ID
  TABLE_GENERATOR_CREATOR_ID_ARM,
  // Creator Revision
  RAW_GENERATOR_REVISION,
  // Build Table function
  BuildRawTable,
  // No additional resources are allocated by the generator.
  // Hence the Free Resource function is not required.
  NULL,
  // Extended build function not needed
  NULL,
  // Extended build function not implemented by the generator.
  // Hence extended free resource function is not required.
  NULL
};

/** Register the Generator with the ACPI Table Factory.

  @param [in]  ImageHandle  The handle to the image.
  @param [in]  SystemTable  Pointer to the System Table.

  @retval EFI_SUCCESS           The Generator is registered.
  @retval EFI_INVALID_PARAMETER A parameter is invalid.
  @retval EFI_ALREADY_STARTED   The Generator for the Table ID
                                is already registered.
**/
EFI_STATUS
EFIAPI
AcpiRawLibConstructor (
  IN  EFI_HANDLE        ImageHandle,
  IN  EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;

  Status = RegisterAcpiTableGenerator (&RawGenerator);
  DEBUG ((DEBUG_INFO, "RAW: Register Generator. Status = %r\n", Status));
  ASSERT_EFI_ERROR (Status);
  return Status;
}

/** Deregister the Generator from the ACPI Table Factory.

  @param [in]  ImageHandle  The handle to the image.
  @param [in]  SystemTable  Pointer to the System Table.

  @retval EFI_SUCCESS           The Generator is deregistered.
  @retval EFI_INVALID_PARAMETER A parameter is invalid.
  @retval EFI_NOT_FOUND         The Generator is not registered.
**/
EFI_STATUS
EFIAPI
AcpiRawLibDestructor (
  IN  EFI_HANDLE        ImageHandle,
  IN  EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;

  Status = DeregisterAcpiTableGenerator (&RawGenerator);
  DEBUG ((DEBUG_INFO, "RAW: Deregister Generator. Status = %r\n", Status));
  ASSERT_EFI_ERROR (Status);
  return Status;
}