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/** @file
CCEL table parser
Copyright (c) 2025, Arm Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- ACPI 6.5 Specification - 29 Aug 2022
**/
#include <IndustryStandard/Acpi.h>
#include <Library/UefiLib.h>
#include "AcpiParser.h"
#include "AcpiTableParser.h"
#include "AcpiViewConfig.h"
// Local variables.
STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
/**
Print the CC Type.
@param [in] Format Optional format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
@param [in] Length Length of the field.
**/
VOID
EFIAPI
PrintCcType (
IN CONST CHAR16 *Format OPTIONAL,
IN UINT8 *Ptr,
IN UINT32 Length
)
{
UINT8 CcType;
CcType = *Ptr;
switch (CcType) {
case EFI_ACPI_6_5_CC_TYPE_NONE:
Print (L"CC Type '%u' - None", CcType);
break;
case EFI_ACPI_6_5_CC_TYPE_SEV:
Print (L"CC Type '%u' - SEV", CcType);
break;
case EFI_ACPI_6_5_CC_TYPE_TDX:
Print (L"CC Type '%u' - TDX", CcType);
break;
case EFI_ACPI_6_5_CC_TYPE_APTEE:
Print (L"CC Type '%u' - APTEE", CcType);
break;
case EFI_ACPI_6_5_CC_TYPE_ARMCCA:
Print (L"CC Type '%u' - Arm CCA", CcType);
break;
default:
Print (L"CC Type '%u' - Unknown", CcType);
} // switch
}
/**
This function validates CC Type field.
@param [in] Ptr Pointer to the start of the field data.
@param [in] Length Length of the field.
@param [in] Context Pointer to context specific information.
**/
VOID
EFIAPI
ValidateCcType (
IN UINT8 *Ptr,
IN UINT32 Length,
IN VOID *Context
)
{
UINT8 CcType;
CcType = *Ptr;
if (CcType > EFI_ACPI_6_5_CC_TYPE_ARMCCA) {
IncrementErrorCount ();
Print (L"\nERROR : Invalid/Unknown CC Type - %u.\n", CcType);
}
}
/**
An ACPI_PARSER array describing the ACPI CCEL Table.
**/
STATIC CONST ACPI_PARSER CcelParser[] = {
PARSE_ACPI_HEADER (&AcpiHdrInfo),
{ L"CC Type", 1, 36, L"%d", NULL, NULL, NULL, NULL },
{ L"CC Subtype", 1, 37, L"%d", PrintCcType, NULL, ValidateCcType, NULL },
{ L"Reserved", 2, 38, NULL, DumpReserved, NULL, ValidateReserved, NULL },
{ L"Log Area Minimum Length (LAML)",8, 40, L"0x%lx", NULL, NULL, NULL, NULL },
{ L"Log Area Start Address (LASA)",8, 48, L"0x%lx", NULL, NULL, NULL, NULL }
};
/**
This function parses the ACPI CCEL table.
When trace is enabled this function parses the CCEL table and
traces the ACPI table fields.
@param [in] Trace If TRUE, trace the ACPI fields.
@param [in] Ptr Pointer to the start of the buffer.
@param [in] AcpiTableLength Length of the ACPI table.
@param [in] AcpiTableRevision Revision of the ACPI table.
**/
VOID
EFIAPI
ParseAcpiCcel (
IN BOOLEAN Trace,
IN UINT8 *Ptr,
IN UINT32 AcpiTableLength,
IN UINT8 AcpiTableRevision
)
{
if (!Trace) {
return;
}
ParseAcpi (
TRUE,
0,
"CCEL",
Ptr,
AcpiTableLength,
PARSER_PARAMS (CcelParser)
);
}
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