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/** @file
ARM FADT Table Helpers
Copyright (c) 2017 - 2023, Arm Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- ACPI 6.5 Specification, Aug 29, 2022
**/
#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>
#include "FadtGenerator.h"
/** ARM Standard FADT Generator
Requirements:
The following Configuration Manager Object(s) are required by
this Generator:
- EArmObjBootArchInfo
*/
/** This macro expands to a function that retrieves the Boot
Architecture Information from the Configuration Manager.
*/
GET_OBJECT_LIST (
EObjNameSpaceArm,
EArmObjBootArchInfo,
CM_ARM_BOOT_ARCH_INFO
);
/** This macro defines the FADT flag options for ARM Platforms.
*/
#define FADT_FLAGS (EFI_ACPI_6_5_HW_REDUCED_ACPI | \
EFI_ACPI_6_5_LOW_POWER_S0_IDLE_CAPABLE)
/** Updates the Architecture specific information in the FADT Table.
@param [in] CfgMgrProtocol Pointer to the Configuration Manager
Protocol Interface.
@param [in, out] Fadt Pointer to the constructed ACPI Table.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_NOT_FOUND The required object was not found.
@retval EFI_BAD_BUFFER_SIZE The size returned by the Configuration
Manager is less than the Object size for the
requested object.
**/
STATIC
EFI_STATUS
EFIAPI
ArmFadtBootArchInfoUpdate (
IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
IN OUT EFI_ACPI_6_5_FIXED_ACPI_DESCRIPTION_TABLE *Fadt
)
{
EFI_STATUS Status;
CM_ARM_BOOT_ARCH_INFO *BootArchInfo;
ASSERT (CfgMgrProtocol != NULL);
ASSERT (Fadt != NULL);
// Get the Boot Architecture flags from the Platform Configuration Manager
Status = GetEArmObjBootArchInfo (
CfgMgrProtocol,
CM_NULL_TOKEN,
&BootArchInfo,
NULL
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: FADT: Failed to get Boot Architecture flags. Status = %r\n",
Status
));
return Status;
}
DEBUG ((
DEBUG_INFO,
"FADT BootArchFlag = 0x%x\n",
BootArchInfo->BootArchFlags
));
Fadt->ArmBootArch = BootArchInfo->BootArchFlags;
return Status;
}
/** Updates the Architecture specific information in the FADT Table.
@param [in] CfgMgrProtocol Pointer to the Configuration Manager
Protocol Interface.
@param [in, out] Fadt Pointer to the constructed ACPI Table.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_NOT_FOUND The required object was not found.
@retval EFI_BAD_BUFFER_SIZE The size returned by the Configuration
Manager is less than the Object size for the
requested object.
**/
EFI_STATUS
EFIAPI
FadtArchUpdate (
IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
IN OUT EFI_ACPI_6_5_FIXED_ACPI_DESCRIPTION_TABLE *Fadt
)
{
ASSERT (CfgMgrProtocol != NULL);
ASSERT (Fadt != NULL);
Fadt->Flags = FADT_FLAGS;
return ArmFadtBootArchInfoUpdate (CfgMgrProtocol, Fadt);
}
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