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audk/ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiParser.c

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/** @file
ACPI parser
Copyright (c) 2016 - 2020, Arm Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include "AcpiParser.h"
#include "AcpiView.h"
#include "AcpiViewConfig.h"
STATIC UINT32 gIndent;
STATIC UINT32 mTableErrorCount;
STATIC UINT32 mTableWarningCount;
STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
/**
An ACPI_PARSER array describing the ACPI header.
**/
STATIC CONST ACPI_PARSER AcpiHeaderParser[] = {
PARSE_ACPI_HEADER (&AcpiHdrInfo)
};
/**
This function resets the ACPI table error counter to Zero.
**/
VOID
ResetErrorCount (
VOID
)
{
mTableErrorCount = 0;
}
/**
This function returns the ACPI table error count.
@retval Returns the count of errors detected in the ACPI tables.
**/
UINT32
GetErrorCount (
VOID
)
{
return mTableErrorCount;
}
/**
This function resets the ACPI table warning counter to Zero.
**/
VOID
ResetWarningCount (
VOID
)
{
mTableWarningCount = 0;
}
/**
This function returns the ACPI table warning count.
@retval Returns the count of warning detected in the ACPI tables.
**/
UINT32
GetWarningCount (
VOID
)
{
return mTableWarningCount;
}
/**
This function increments the ACPI table error counter.
**/
VOID
EFIAPI
IncrementErrorCount (
VOID
)
{
mTableErrorCount++;
}
/**
This function increments the ACPI table warning counter.
**/
VOID
EFIAPI
IncrementWarningCount (
VOID
)
{
mTableWarningCount++;
}
/**
This function verifies the ACPI table checksum.
This function verifies the checksum for the ACPI table and optionally
prints the status.
@param [in] Log If TRUE log the status of the checksum.
@param [in] Ptr Pointer to the start of the table buffer.
@param [in] Length The length of the buffer.
@retval TRUE The checksum is OK.
@retval FALSE The checksum failed.
**/
BOOLEAN
EFIAPI
VerifyChecksum (
IN BOOLEAN Log,
IN UINT8* Ptr,
IN UINT32 Length
)
{
UINTN ByteCount;
UINT8 Checksum;
UINTN OriginalAttribute;
//
// set local variables to suppress incorrect compiler/analyzer warnings
//
OriginalAttribute = 0;
ByteCount = 0;
Checksum = 0;
while (ByteCount < Length) {
Checksum += *(Ptr++);
ByteCount++;
}
if (Log) {
OriginalAttribute = gST->ConOut->Mode->Attribute;
if (Checksum == 0) {
if (GetColourHighlighting ()) {
gST->ConOut->SetAttribute (
gST->ConOut,
EFI_TEXT_ATTR (EFI_GREEN,
((OriginalAttribute&(BIT4|BIT5|BIT6))>>4))
);
}
Print (L"Table Checksum : OK\n\n");
} else {
IncrementErrorCount ();
if (GetColourHighlighting ()) {
gST->ConOut->SetAttribute (
gST->ConOut,
EFI_TEXT_ATTR (EFI_RED,
((OriginalAttribute&(BIT4|BIT5|BIT6))>>4))
);
}
Print (L"Table Checksum : FAILED (0x%X)\n\n", Checksum);
}
if (GetColourHighlighting ()) {
gST->ConOut->SetAttribute (gST->ConOut, OriginalAttribute);
}
}
return (Checksum == 0);
}
/**
This function performs a raw data dump of the ACPI table.
@param [in] Ptr Pointer to the start of the table buffer.
@param [in] Length The length of the buffer.
**/
VOID
EFIAPI
DumpRaw (
IN UINT8* Ptr,
IN UINT32 Length
)
{
UINTN ByteCount;
UINTN PartLineChars;
UINTN AsciiBufferIndex;
CHAR8 AsciiBuffer[17];
ByteCount = 0;
AsciiBufferIndex = 0;
Print (L"Address : 0x%p\n", Ptr);
Print (L"Length : %d\n", Length);
while (ByteCount < Length) {
if ((ByteCount & 0x0F) == 0) {
AsciiBuffer[AsciiBufferIndex] = '\0';
Print (L" %a\n%08X : ", AsciiBuffer, ByteCount);
AsciiBufferIndex = 0;
} else if ((ByteCount & 0x07) == 0) {
Print (L"- ");
}
if ((*Ptr >= ' ') && (*Ptr < 0x7F)) {
AsciiBuffer[AsciiBufferIndex++] = *Ptr;
} else {
AsciiBuffer[AsciiBufferIndex++] = '.';
}
Print (L"%02X ", *Ptr++);
ByteCount++;
}
// Justify the final line using spaces before printing
// the ASCII data.
PartLineChars = (Length & 0x0F);
if (PartLineChars != 0) {
PartLineChars = 48 - (PartLineChars * 3);
if ((Length & 0x0F) <= 8) {
PartLineChars += 2;
}
while (PartLineChars > 0) {
Print (L" ");
PartLineChars--;
}
}
// Print ASCII data for the final line.
AsciiBuffer[AsciiBufferIndex] = '\0';
Print (L" %a\n\n", AsciiBuffer);
}
/**
This function traces 1 byte of data as specified in the format string.
@param [in] Format The format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
DumpUint8 (
IN CONST CHAR16* Format,
IN UINT8* Ptr
)
{
Print (Format, *Ptr);
}
/**
This function traces 2 bytes of data as specified in the format string.
@param [in] Format The format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
DumpUint16 (
IN CONST CHAR16* Format,
IN UINT8* Ptr
)
{
Print (Format, *(UINT16*)Ptr);
}
/**
This function traces 4 bytes of data as specified in the format string.
@param [in] Format The format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
DumpUint32 (
IN CONST CHAR16* Format,
IN UINT8* Ptr
)
{
Print (Format, *(UINT32*)Ptr);
}
/**
This function traces 8 bytes of data as specified by the format string.
@param [in] Format The format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
DumpUint64 (
IN CONST CHAR16* Format,
IN UINT8* Ptr
)
{
// Some fields are not aligned and this causes alignment faults
// on ARM platforms if the compiler generates LDRD instructions.
// Perform word access so that LDRD instructions are not generated.
UINT64 Val;
Val = *(UINT32*)(Ptr + sizeof (UINT32));
Val = LShiftU64(Val,32);
Val |= (UINT64)*(UINT32*)Ptr;
Print (Format, Val);
}
/**
This function traces 3 characters which can be optionally
formated using the format string if specified.
If no format string is specified the Format must be NULL.
@param [in] Format Optional format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
Dump3Chars (
IN CONST CHAR16* Format OPTIONAL,
IN UINT8* Ptr
)
{
Print (
(Format != NULL) ? Format : L"%c%c%c",
Ptr[0],
Ptr[1],
Ptr[2]
);
}
/**
This function traces 4 characters which can be optionally
formated using the format string if specified.
If no format string is specified the Format must be NULL.
@param [in] Format Optional format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
Dump4Chars (
IN CONST CHAR16* Format OPTIONAL,
IN UINT8* Ptr
)
{
Print (
(Format != NULL) ? Format : L"%c%c%c%c",
Ptr[0],
Ptr[1],
Ptr[2],
Ptr[3]
);
}
/**
This function traces 6 characters which can be optionally
formated using the format string if specified.
If no format string is specified the Format must be NULL.
@param [in] Format Optional format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
Dump6Chars (
IN CONST CHAR16* Format OPTIONAL,
IN UINT8* Ptr
)
{
Print (
(Format != NULL) ? Format : L"%c%c%c%c%c%c",
Ptr[0],
Ptr[1],
Ptr[2],
Ptr[3],
Ptr[4],
Ptr[5]
);
}
/**
This function traces 8 characters which can be optionally
formated using the format string if specified.
If no format string is specified the Format must be NULL.
@param [in] Format Optional format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
Dump8Chars (
IN CONST CHAR16* Format OPTIONAL,
IN UINT8* Ptr
)
{
Print (
(Format != NULL) ? Format : L"%c%c%c%c%c%c%c%c",
Ptr[0],
Ptr[1],
Ptr[2],
Ptr[3],
Ptr[4],
Ptr[5],
Ptr[6],
Ptr[7]
);
}
/**
This function traces 12 characters which can be optionally
formated using the format string if specified.
If no format string is specified the Format must be NULL.
@param [in] Format Optional format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
Dump12Chars (
IN CONST CHAR16* Format OPTIONAL,
IN UINT8* Ptr
)
{
Print (
(Format != NULL) ? Format : L"%c%c%c%c%c%c%c%c%c%c%c%c",
Ptr[0],
Ptr[1],
Ptr[2],
Ptr[3],
Ptr[4],
Ptr[5],
Ptr[6],
Ptr[7],
Ptr[8],
Ptr[9],
Ptr[10],
Ptr[11]
);
}
/**
This function indents and prints the ACPI table Field Name.
@param [in] Indent Number of spaces to add to the global table indent.
The global table indent is 0 by default; however
this value is updated on entry to the ParseAcpi()
by adding the indent value provided to ParseAcpi()
and restored back on exit.
Therefore the total indent in the output is
dependent on from where this function is called.
@param [in] FieldName Pointer to the Field Name.
**/
VOID
EFIAPI
PrintFieldName (
IN UINT32 Indent,
IN CONST CHAR16* FieldName
)
{
Print (
L"%*a%-*s : ",
gIndent + Indent,
"",
(OUTPUT_FIELD_COLUMN_WIDTH - gIndent - Indent),
FieldName
);
}
/**
This function is used to parse an ACPI table buffer.
The ACPI table buffer is parsed using the ACPI table parser information
specified by a pointer to an array of ACPI_PARSER elements. This parser
function iterates through each item on the ACPI_PARSER array and logs the
ACPI table fields.
This function can optionally be used to parse ACPI tables and fetch specific
field values. The ItemPtr member of the ACPI_PARSER structure (where used)
is updated by this parser function to point to the selected field data
(e.g. useful for variable length nested fields).
@param [in] Trace Trace the ACPI fields TRUE else only parse the
table.
@param [in] Indent Number of spaces to indent the output.
@param [in] AsciiName Optional pointer to an ASCII string that describes
the table being parsed.
@param [in] Ptr Pointer to the start of the buffer.
@param [in] Length Length of the buffer pointed by Ptr.
@param [in] Parser Pointer to an array of ACPI_PARSER structure that
describes the table being parsed.
@param [in] ParserItems Number of items in the ACPI_PARSER array.
@retval Number of bytes parsed.
**/
UINT32
EFIAPI
ParseAcpi (
IN BOOLEAN Trace,
IN UINT32 Indent,
IN CONST CHAR8* AsciiName OPTIONAL,
IN UINT8* Ptr,
IN UINT32 Length,
IN CONST ACPI_PARSER* Parser,
IN UINT32 ParserItems
)
{
UINT32 Index;
UINT32 Offset;
BOOLEAN HighLight;
UINTN OriginalAttribute;
//
// set local variables to suppress incorrect compiler/analyzer warnings
//
OriginalAttribute = 0;
Offset = 0;
// Increment the Indent
gIndent += Indent;
if (Trace && (AsciiName != NULL)){
HighLight = GetColourHighlighting ();
if (HighLight) {
OriginalAttribute = gST->ConOut->Mode->Attribute;
gST->ConOut->SetAttribute (
gST->ConOut,
EFI_TEXT_ATTR(EFI_YELLOW,
((OriginalAttribute&(BIT4|BIT5|BIT6))>>4))
);
}
Print (
L"%*a%-*a :\n",
gIndent,
"",
(OUTPUT_FIELD_COLUMN_WIDTH - gIndent),
AsciiName
);
if (HighLight) {
gST->ConOut->SetAttribute (gST->ConOut, OriginalAttribute);
}
}
for (Index = 0; Index < ParserItems; Index++) {
if ((Offset + Parser[Index].Length) > Length) {
// For fields outside the buffer length provided, reset any pointers
// which were supposed to be updated by this function call
if (Parser[Index].ItemPtr != NULL) {
*Parser[Index].ItemPtr = NULL;
}
// We don't parse past the end of the max length specified
continue;
}
if (GetConsistencyChecking () &&
(Offset != Parser[Index].Offset)) {
IncrementErrorCount ();
Print (
L"\nERROR: %a: Offset Mismatch for %s\n"
L"CurrentOffset = %d FieldOffset = %d\n",
AsciiName,
Parser[Index].NameStr,
Offset,
Parser[Index].Offset
);
}
if (Trace) {
// if there is a Formatter function let the function handle
// the printing else if a Format is specified in the table use
// the Format for printing
PrintFieldName (2, Parser[Index].NameStr);
if (Parser[Index].PrintFormatter != NULL) {
Parser[Index].PrintFormatter (Parser[Index].Format, Ptr);
} else if (Parser[Index].Format != NULL) {
switch (Parser[Index].Length) {
case 1:
DumpUint8 (Parser[Index].Format, Ptr);
break;
case 2:
DumpUint16 (Parser[Index].Format, Ptr);
break;
case 4:
DumpUint32 (Parser[Index].Format, Ptr);
break;
case 8:
DumpUint64 (Parser[Index].Format, Ptr);
break;
default:
Print (
L"\nERROR: %a: CANNOT PARSE THIS FIELD, Field Length = %d\n",
AsciiName,
Parser[Index].Length
);
} // switch
}
// Validating only makes sense if we are tracing
// the parsed table entries, to report by table name.
if (GetConsistencyChecking () &&
(Parser[Index].FieldValidator != NULL)) {
Parser[Index].FieldValidator (Ptr, Parser[Index].Context);
}
Print (L"\n");
} // if (Trace)
if (Parser[Index].ItemPtr != NULL) {
*Parser[Index].ItemPtr = (VOID*)Ptr;
}
Ptr += Parser[Index].Length;
Offset += Parser[Index].Length;
} // for
// Decrement the Indent
gIndent -= Indent;
return Offset;
}
/**
An array describing the ACPI Generic Address Structure.
The GasParser array is used by the ParseAcpi function to parse and/or trace
the GAS structure.
**/
STATIC CONST ACPI_PARSER GasParser[] = {
{L"Address Space ID", 1, 0, L"0x%x", NULL, NULL, NULL, NULL},
{L"Register Bit Width", 1, 1, L"0x%x", NULL, NULL, NULL, NULL},
{L"Register Bit Offset", 1, 2, L"0x%x", NULL, NULL, NULL, NULL},
{L"Address Size", 1, 3, L"0x%x", NULL, NULL, NULL, NULL},
{L"Address", 8, 4, L"0x%lx", NULL, NULL, NULL, NULL}
};
/**
This function indents and traces the GAS structure as described by the GasParser.
@param [in] Ptr Pointer to the start of the buffer.
@param [in] Indent Number of spaces to indent the output.
@param [in] Length Length of the GAS structure buffer.
@retval Number of bytes parsed.
**/
UINT32
EFIAPI
DumpGasStruct (
IN UINT8* Ptr,
IN UINT32 Indent,
IN UINT32 Length
)
{
Print (L"\n");
return ParseAcpi (
TRUE,
Indent,
NULL,
Ptr,
Length,
PARSER_PARAMS (GasParser)
);
}
/**
This function traces the GAS structure as described by the GasParser.
@param [in] Format Optional format string for tracing the data.
@param [in] Ptr Pointer to the start of the buffer.
**/
VOID
EFIAPI
DumpGas (
IN CONST CHAR16* Format OPTIONAL,
IN UINT8* Ptr
)
{
DumpGasStruct (Ptr, 2, sizeof (EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE));
}
/**
This function traces the ACPI header as described by the AcpiHeaderParser.
@param [in] Ptr Pointer to the start of the buffer.
@retval Number of bytes parsed.
**/
UINT32
EFIAPI
DumpAcpiHeader (
IN UINT8* Ptr
)
{
return ParseAcpi (
TRUE,
0,
"ACPI Table Header",
Ptr,
sizeof (EFI_ACPI_DESCRIPTION_HEADER),
PARSER_PARAMS (AcpiHeaderParser)
);
}
/**
This function parses the ACPI header as described by the AcpiHeaderParser.
This function optionally returns the signature, length and revision of the
ACPI table.
@param [in] Ptr Pointer to the start of the buffer.
@param [out] Signature Gets location of the ACPI table signature.
@param [out] Length Gets location of the length of the ACPI table.
@param [out] Revision Gets location of the revision of the ACPI table.
@retval Number of bytes parsed.
**/
UINT32
EFIAPI
ParseAcpiHeader (
IN UINT8* Ptr,
OUT CONST UINT32** Signature,
OUT CONST UINT32** Length,
OUT CONST UINT8** Revision
)
{
UINT32 BytesParsed;
BytesParsed = ParseAcpi (
FALSE,
0,
NULL,
Ptr,
sizeof (EFI_ACPI_DESCRIPTION_HEADER),
PARSER_PARAMS (AcpiHeaderParser)
);
*Signature = AcpiHdrInfo.Signature;
*Length = AcpiHdrInfo.Length;
*Revision = AcpiHdrInfo.Revision;
return BytesParsed;
}
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