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/** @file
SLIT table parser
Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
@par Reference(s):
- ACPI 6.2 Specification - Errata A, September 2017
**/
#include <IndustryStandard/Acpi.h>
#include <Library/PrintLib.h>
#include <Library/UefiLib.h>
#include "AcpiParser.h"
#include "AcpiTableParser.h"
// Local Variables
STATIC CONST UINT64* SlitSystemLocalityCount;
STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
/**
An ACPI_PARSER array describing the ACPI SLIT table.
**/
STATIC CONST ACPI_PARSER SlitParser[] = {
PARSE_ACPI_HEADER (&AcpiHdrInfo),
{L"Number of System Localities", 8, 36, L"0x%lx", NULL,
(VOID**)&SlitSystemLocalityCount, NULL, NULL}
};
/**
Macro to get the value of a System Locality
**/
#define SLIT_ELEMENT(Ptr, i, j) *(Ptr + (i * LocalityCount) + j)
/**
This function parses the ACPI SLIT table.
When trace is enabled this function parses the SLIT table and
traces the ACPI table fields.
This function also validates System Localities for the following:
- Diagonal elements have a normalized value of 10
- Relative distance from System Locality at i*N+j is same as
j*N+i
@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
ParseAcpiSlit (
IN BOOLEAN Trace,
IN UINT8* Ptr,
IN UINT32 AcpiTableLength,
IN UINT8 AcpiTableRevision
)
{
UINT32 Offset;
UINT64 Count;
UINT64 Index;
UINT64 LocalityCount;
UINT8* LocalityPtr;
CHAR16 Buffer[80]; // Used for AsciiName param of ParseAcpi
if (!Trace) {
return;
}
Offset = ParseAcpi (
TRUE,
0,
"SLIT",
Ptr,
AcpiTableLength,
PARSER_PARAMS (SlitParser)
);
LocalityPtr = Ptr + Offset;
LocalityCount = *SlitSystemLocalityCount;
// We only print the Localities if the count is less than 16
// If the locality count is more than 16 then refer to the
// raw data dump.
if (LocalityCount < 16) {
UnicodeSPrint (
Buffer,
sizeof (Buffer),
L"Entry[0x%lx][0x%lx]",
LocalityCount,
LocalityCount
);
PrintFieldName (0, Buffer);
Print (L"\n");
Print (L" ");
for (Index = 0; Index < LocalityCount; Index++) {
Print (L" (%3d) ", Index);
}
Print (L"\n");
for (Count = 0; Count< LocalityCount; Count++) {
Print (L" (%3d) ", Count);
for (Index = 0; Index < LocalityCount; Index++) {
Print (L" %3d ", SLIT_ELEMENT (LocalityPtr, Count, Index));
}
Print (L"\n");
}
}
// Validate
for (Count = 0; Count < LocalityCount; Count++) {
for (Index = 0; Index < LocalityCount; Index++) {
// Element[x][x] must be equal to 10
if ((Count == Index) && (SLIT_ELEMENT (LocalityPtr, Count,Index) != 10)) {
IncrementErrorCount ();
Print (
L"ERROR: Diagonal Element[0x%lx][0x%lx] (%3d)."
" Normalized Value is not 10\n",
Count,
Index,
SLIT_ELEMENT (LocalityPtr, Count, Index)
);
}
// Element[i][j] must be equal to Element[j][i]
if (SLIT_ELEMENT (LocalityPtr, Count, Index) !=
SLIT_ELEMENT (LocalityPtr, Index, Count)) {
IncrementErrorCount ();
Print (
L"ERROR: Relative distances for Element[0x%lx][0x%lx] (%3d) and \n"
"Element[0x%lx][0x%lx] (%3d) do not match.\n",
Count,
Index,
SLIT_ELEMENT (LocalityPtr, Count, Index),
Index,
Count,
SLIT_ELEMENT (LocalityPtr, Index, Count)
);
}
}
}
}
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