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/** @file
XSDT table parser
Copyright (c) 2016 - 2019, ARM Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- ACPI 6.2 Specification - Errata A, September 2017
**/
#include <IndustryStandard/Acpi.h>
#include <Library/UefiLib.h>
#include <Library/PrintLib.h>
#include "AcpiParser.h"
#include "AcpiTableParser.h"
// Local variables
STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
/** An ACPI_PARSER array describing the ACPI XSDT table.
*/
STATIC CONST ACPI_PARSER XsdtParser[] = {
PARSE_ACPI_HEADER (&AcpiHdrInfo)
};
/**
Get the ACPI XSDT header info.
**/
CONST ACPI_DESCRIPTION_HEADER_INFO *
EFIAPI
GetAcpiXsdtHeaderInfo (
VOID
)
{
return &AcpiHdrInfo;
}
/**
This function parses the ACPI XSDT table and optionally traces the ACPI table fields.
This function also performs validation of the XSDT table.
@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
ParseAcpiXsdt (
IN BOOLEAN Trace,
IN UINT8 *Ptr,
IN UINT32 AcpiTableLength,
IN UINT8 AcpiTableRevision
)
{
UINT32 Offset;
UINT32 TableOffset;
UINT64 *TablePointer;
UINTN EntryIndex;
CHAR16 Buffer[32];
Offset = ParseAcpi (
Trace,
0,
"XSDT",
Ptr,
AcpiTableLength,
PARSER_PARAMS (XsdtParser)
);
TableOffset = Offset;
if (Trace) {
EntryIndex = 0;
TablePointer = (UINT64 *)(Ptr + TableOffset);
while (Offset < AcpiTableLength) {
CONST UINT32 *Signature;
CONST UINT32 *Length;
CONST UINT8 *Revision;
if ((UINT64 *)(UINTN)(*TablePointer) != NULL) {
UINT8 *SignaturePtr;
ParseAcpiHeader (
(UINT8 *)(UINTN)(*TablePointer),
&Signature,
&Length,
&Revision
);
SignaturePtr = (UINT8 *)Signature;
UnicodeSPrint (
Buffer,
sizeof (Buffer),
L"Entry[%d] - %c%c%c%c",
EntryIndex++,
SignaturePtr[0],
SignaturePtr[1],
SignaturePtr[2],
SignaturePtr[3]
);
} else {
UnicodeSPrint (
Buffer,
sizeof (Buffer),
L"Entry[%d]",
EntryIndex++
);
}
PrintFieldName (2, Buffer);
Print (L"0x%lx\n", *TablePointer);
// Validate the table pointers are not NULL
if ((UINT64 *)(UINTN)(*TablePointer) == NULL) {
IncrementErrorCount ();
Print (
L"ERROR: Invalid table entry at 0x%lx, table address is 0x%lx\n",
TablePointer,
*TablePointer
);
}
Offset += sizeof (UINT64);
TablePointer++;
} // while
}
// Process the tables
Offset = TableOffset;
TablePointer = (UINT64 *)(Ptr + TableOffset);
while (Offset < AcpiTableLength) {
if ((UINT64 *)(UINTN)(*TablePointer) != NULL) {
ProcessAcpiTable ((UINT8 *)(UINTN)(*TablePointer));
}
Offset += sizeof (UINT64);
TablePointer++;
} // while
}
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